CN110035472A - A kind of transmission method and the network equipment - Google Patents

Abstract

This application provides a kind of transmission method and the network equipments, the transmission method includes: first instruction information of the first network node reception from the second network node, which is used to indicate the effective coverage of each system information at least one system information；The first network node sends at least one system information and the first instruction information to terminal device, in order to which the terminal device knows effective coverage applied by least one system information.The transmission method of the embodiment of the present application helps to solve the problems, such as the effective coverage of system information being indicated to terminal device.

Description

A transmission method and network device

technical field

The present application relates to the field of communications, and more particularly, to a transmission method and network device.

Background technique

In new access technologies such as 5G (New Radio, NR) technology, a minimum system information (Minimum System Information, MSI) is defined, and the MSI can provide other system information (other SIs) available in the cell. NR is used in the broadcast system. When the information is received, other SIs in the MSI may not necessarily be broadcast, and the terminal device determines whether the required System Information Block (SIB) has been broadcast by checking the received scheduling information. For the SI that is not broadcast, the terminal device can request the base station to obtain the SI.

In NR, a base station can be composed of a Centralized Unit (CU) and a Distributed Unit (DU), that is, the functions of the base station in the original access network are split, and some functions of the base station are deployed in One CU deploys the remaining functions in multiple DUs, and multiple DUs share one CU, which can save costs and facilitate network expansion.

At present, the DU under the NR CU-DU architecture in the standard broadcast system information can indicate the effective area ID (area ID) of the system information to the terminal equipment. When the terminal equipment moves to a new effective area, it will read the new effective area ID. , if there is no change in the valid area identifier, there is no need to re-read the system information. How to indicate the effective area of the system information to the terminal device has become an urgent problem to be solved.

SUMMARY OF THE INVENTION

The present application provides a transmission method and network device, wherein the effective area of system information is determined by a second network node, which helps to solve the problem of indicating the effective area of system information to terminal equipment.

In a first aspect, a transmission method is provided, the method comprising: a first network node receiving first indication information from a second network node, where the first indication information is used to indicate at least one system information of each system information Effective area; the first network node sends the at least one system information and the first indication information to the terminal device, so that the terminal device can know the effective area to which the at least one system information is applied.

In some possible implementations, the valid area of the at least one system information is cell granularity or base station granularity.

In the transmission method of the embodiment of the present application, the effective area of the system information is determined by the second network node, which helps to solve the problem of indicating the effective area of the system information to the terminal device.

With reference to the first aspect, in some possible implementations of the first aspect, the method further includes: the first network node receiving first configuration information from the second network node, where the first configuration information includes at least one At least one of the system information block, the scheduling information of the at least one system information block, the mapping relationship between the at least one system information and the at least one system information block, and the scheduling period of each system information in the at least one system information.

In some possible implementations, the first indication information and the first configuration information may be respectively indicated to the first network node by the second network node in two information elements, or may be indicated by the first network node in the same information element. The second network node indicates to the first network node.

In the transmission method of the embodiment of the present application, the first network node receives the configuration information of the system information of the second network node, which helps the first network node to determine the final configuration information of the at least one system information, so as to broadcast the system information to the terminal device .

With reference to the first aspect, in some possible implementations of the first aspect, the method further includes: the first network node determining second configuration information, where the second configuration information is used by the first network node to send the at least one used by the system information, the second configuration information includes the window length of each system information in the at least one system information, the scheduling information of the at least one system information block, the mapping relationship between the at least one system information and the at least one system information block, the At least one of the scheduling periods of each system information in the at least one system information.

With reference to the first aspect, in some possible implementations of the first aspect, the scheduling information of the at least one system information block includes a scheduling period of each system information block in the at least one system information block, and the at least one system information block At least one of the alert area list of each system information block and the broadcast times of each system information block in the at least one system information.

With reference to the first aspect, in some possible implementations of the first aspect, the method further includes: the first network node receiving closed subscriber group (Closed Subscriber Group, CSG) indication information from the second network node and CSG identification information, where the CSG indication information is used to indicate that the cell where the terminal equipment is located is a CSG cell, or the CSG indication information is used to indicate that the cell where the terminal equipment is located is not a CSG cell.

In the transmission method of the embodiment of the present application, determining the CSG indication information by the second network node helps the terminal device to determine whether the cell where the terminal device is located is a CSG cell.

In some possible implementations, when at least part of the system information in the at least one system information is updated, the method further includes: the first network node receiving second indication information from the second network node, the second The indication information is used to indicate at least one of the at least part of the system information, the system information block in the at least part of the system information, and the valid area of the at least part of the system information.

With reference to the first aspect, in some possible implementations of the first aspect, when the valid area indicates an area level, the first indication information includes an area identifier area ID.

With reference to the first aspect, in some possible implementations of the first aspect, when the valid area indicates an area level and a cell level, the first indication information includes an area ID and bitmap information bitmap.

In conjunction with the first aspect, in some possible implementations of the first aspect, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function; and/or The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

In some possible implementations, the protocol stack architecture of the first network node is at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function.

In some possible implementations, the protocol stack architecture of the second network node is at least one of a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer.

In some possible implementations, the first network node is a DU, and the second network node is a CU.

The transmission methods in the embodiments of the present application are applicable to the NR CU-DU architecture, and are also applicable to other technical fields, such as scenarios similar to Long Term Evolution (Long Term Evolution, LTE) and other standard collaboration scenarios.

In a second aspect, a transmission method is provided, the method comprising: a second network node determining a valid area of each system information in at least one system information; the second network node sending first indication information to the first network node, the The first indication information is used to indicate the valid area of each system information in the at least one system information.

With reference to the second aspect, in some possible implementations of the second aspect, the method further includes: the second network node sending first configuration information to the first network node, where the first configuration information includes at least one piece of system information at least one of the block, the scheduling information of the at least one system information block, the mapping relationship between the at least one system information and the at least one system information block, and the scheduling period of each system information in the at least one system information.

With reference to the second aspect, in some possible implementations of the second aspect, the scheduling information of the at least one system information block includes a scheduling period of each system information block in the at least one system information block, and the at least one system information block At least one of the alert area list of each system information block and the broadcast times of each system information block in the at least one system information.

With reference to the second aspect, in some possible implementations of the second aspect, the method further includes: the second network node determines CSG indication information and CSG identification information, where the CSG indication information is used to indicate a cell where the terminal device is located is a CSG cell, or the CSG indication information is used to indicate that the cell where the terminal device is located is not a CSG cell; the second network node sends the CSG indication information and the CSG identification information to the first network node.

In some possible implementations, when at least part of the system information in the at least one system information is updated, the method further includes: the second network node sending second indication information to the first network node, the second indication information It is used to indicate at least one of the at least part of the system information, the system information block in the at least part of the system information, and the valid area of the at least part of the system information.

In conjunction with the second aspect, in some possible implementations of the second aspect, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function; and/or The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

In some possible implementations, the protocol stack architecture of the first network node is at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function.

In some possible implementations, the protocol stack architecture of the second network node is at least one of a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer.

In a third aspect, a transmission method is provided, the method comprising: a terminal device receiving at least one system information and first indication information from a first network node, where the first indication information is used to indicate each of the at least one system information The effective area of the system information; the terminal device determines the effective area to which the at least one system information is applied according to the first indication information.

With reference to the third aspect, in some possible implementation manners of the third aspect, the method further includes: the terminal device receiving closed subscriber group CSG indication information and CSG identification information from the first network node, the CSG indication information It is used to indicate that the cell where the terminal equipment is located is a CSG cell, or the CSG indication information is used to indicate that the cell where the terminal equipment is located is not a CSG cell.

With reference to the third aspect, in some possible implementations of the third aspect, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function.

In some possible implementations, the protocol stack architecture of the first network node is at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function.

In some possible implementations, the protocol stack architecture of the second network node is at least one of a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer.

A fourth aspect is a transmission method, the method comprising: a first network node determining that a terminal device uses a first message to request system information or a system information block, where the first message is a random access first message or a random access third message , the first network node includes at least one of a radio link layer control protocol layer, a media access control layer and a physical layer function; the first network node sends third indication information to the terminal device, the third indication information It is used to instruct the terminal device to use the first message to request system information or a system information block; wherein the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function.

In some possible implementations, the protocol stack architecture of the first network node is at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function.

In the transmission method of the embodiment of the present application, the first network node determines that the terminal device uses the first message to request the system information or the system information block, which helps the terminal device to specify the request method when requesting the system information or the system information block.

With reference to the fourth aspect, in some possible implementations of the fourth aspect, the first message is a random access first message, and the third indication information is further used to indicate at least one system information and a random access preamble sequence Mapping relations.

With reference to the fourth aspect, in some possible implementations of the fourth aspect, the first message is a third random access message, and the method further includes: the first network node receiving a system from the second network node At least one of information request response information and conflict resolution identification information.

With reference to the fourth aspect, in some possible implementations of the fourth aspect, the first message is a third random access message, and the method further includes: the first network node receiving a bitmap from the second network node indication information, the bitmap indication information is used to indicate the system information or system information block sent to the terminal device; the first network node sends a MAC CE to the terminal device, and the MAC CE includes the bitmap indication information; or, the first network The node forwards the bitmap indication sent by the second network node to the terminal device, where the bitmap indication is used to indicate the system information or system information block sent to the terminal device.

The transmission method of the embodiment of the present application indicates to the terminal equipment the mapping relationship between the system information and the random access preamble sequence through the first network node, which helps to solve the problem of specifying the request method when the terminal equipment requests system information or system information blocks.

A fifth aspect provides a transmission method, the method comprising: a second network node determining that a terminal device uses a first message to request system information or a system information block, where the first message is a random access first message or a random access first message Three messages; the second network node sends third indication information to the first network node, the third indication information is used to instruct the first network node to send fourth indication information to the terminal device, and the fourth indication information is used to indicate The terminal device uses the first message to request system information or a system information block; wherein the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

In some possible implementations, the protocol stack architecture of the first network node is at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function.

In some possible implementations, the protocol stack architecture of the second network node is at least one of a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer.

In the transmission method of the embodiment of the present application, the second network node determines that the terminal device uses the first message to request the system information or the system information block, which helps to solve the problem of specifying the request method when the terminal device requests the system information or the system information block.

With reference to the fifth aspect, in some possible implementations of the fifth aspect, the first message is a random access first message, and the third indication information is further used to indicate at least one system information and a random access preamble sequence Mapping relations.

In the transmission method of the embodiment of the present application, the second network node indicates the mapping relationship between the system information and the random access preamble sequence to the terminal device, which helps to solve the problem of specifying the request method when the terminal device requests system information or system information blocks.

With reference to the fifth aspect, in some possible implementations of the fifth aspect, the first message is a random access first message, and the fourth indication information is further used to indicate at least one system information and a random access preamble sequence Mapping relations.

The transmission method of the embodiment of the present application indicates to the terminal equipment the mapping relationship between the system information and the random access preamble sequence through the first network node, which helps to solve the problem of specifying the request method when the terminal equipment requests system information or system information blocks.

With reference to the fifth aspect, in some possible implementations of the fifth aspect, the first message is a third random access message, and the third indication information is also used by the first network node to indicate to the terminal device to use the The random access third message requests system information, or, the third indication information is used by the first network node to indicate to the terminal device to use the random access third message to request a system information block.

With reference to the fifth aspect, in some possible implementations of the fifth aspect, the first message is a third random access message, and the method further includes: the second network node sending a system information request to the first network node In response, the system information request response includes at least one of system information request response information and conflict resolution identification information.

With reference to the fifth aspect, in some possible implementations of the fifth aspect, the first message is a third random access message, and the method further includes: the second network node indicates information to the bitmap of the first network node , the bitmap indication information is used to indicate the system information sent to the terminal device; or, the second network node sends bitmap indication information to the terminal device through the first network node, and the bitmap indication information is used to indicate the system information sent to the terminal device. System Information or System Information Block.

In the transmission method of the embodiment of the present application, the second network node instructs the terminal device to instruct the terminal device to use the random access third message to request the system information or the system information block, which helps to solve the problem that the terminal device requests the system information or the system information Specify the request method when blocking.

In a sixth aspect, a transmission method is provided, the method comprising: a first network node sending resource status information to a second network node, the resource status information including at least one of physical resource blocks, hardware loads and almost blank subframes ; wherein, the first network node includes at least one of radio link layer control protocol layer, medium access control layer and physical layer function; and/or the second network node includes radio resource control protocol layer, service data adaptation layer at least one of a configuration layer and a packet data convergence protocol layer.

In some possible implementations, the protocol stack architecture of the first network node is at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function.

In some possible implementations, the protocol stack architecture of the second network node is at least one of a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer.

In the transmission method of the embodiment of the present application, the first network node sends the resource status information to the second network node, which helps to solve the problem of mutual requests for resource status between network devices.

With reference to the sixth aspect, in some possible implementations of the sixth aspect, before the first network node sends the resource status information to the second network node, the method further includes: the first network node receives the resource sent by the second network node Status request message, the resource status request message is used to request the resource status information.

With reference to the sixth aspect, in some possible implementation manners of the sixth aspect, the method further includes: the first network node receiving the resource status information from the third network node of the second network node.

In a seventh aspect, a transmission method is provided, the method comprising: a second network node receiving first resource state information from a first network node, the first resource state information including physical resource blocks, hardware loads and almost blanks at least one of the subframes; the second network node sends second resource status information to the third network node, the second resource status information includes physical resource blocks, hardware loads, almost blank subframes, transport network layer loads, available capacity , at least one of a reference signal received power measurement report and a channel state information report. Wherein, the first network node includes at least one of radio link layer control protocol layer, medium access control layer and physical layer function; and/or the second network node includes radio resource control protocol layer, service data adaptation layer layer and at least one of the Packet Data Convergence Protocol layer.

In some possible implementations, the protocol stack architecture of the first network node is at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function.

In some possible implementations, the protocol stack architecture of the second network node is at least one of a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer.

In the transmission method of the embodiment of the present application, the resource status information is sent by the second network node to the third network node, which helps to solve the problem of mutual requests for resource status between network devices.

With reference to the seventh aspect, in some possible implementations of the seventh aspect, before the second network node receives the first resource state information from the first network node, the method further includes: the second network node receives the The second resource status request information sent by the third network node, the second resource request information is used to request the second resource status information; the second network node sends the first resource status request information to the first network node, the first resource status request information The resource status request message is used to request the first resource status information; the second network node receives a measurement result from the first network node, and the measurement result includes at least one of physical resource blocks, hardware loads and almost blank subframes kind.

With reference to the seventh aspect, in some possible implementations of the seventh aspect, the method further includes: receiving, by the second network node, the second resource status information sent by the third network node; The first network node sends the first resource status information.

In an eighth aspect, a transmission method is provided, the transmission method comprising: generating a second message by a terminal device, where the second message includes fourth indication information, where the fourth indication information is used to instruct the terminal device to request system information or system information information block, or the fourth indication information is used to instruct the terminal device to request to establish an RRC connection; or, the terminal device generates a second message, the second message is carried on the first logical channel or the second logical channel, the first logical The channel is used to carry a message requesting system information or a system information block, and the second logical channel is used to carry a message requesting an RRC connection; or, the terminal device generates a second message, and the second message uses the first logical channel identifier or the second a logical channel identifier, the first logical channel identifier is used to identify a message requesting system information, and the second logical channel identifier is used to identify a message requesting an RRC connection; the terminal device sends the second message to the first network node, the first logical channel identifier A network node includes at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function.

With reference to the eighth aspect, in some possible implementations of the eighth aspect, the fourth indication information is included in a message header of a fourth message, and the message header may be a MAC layer header or an RLC layer header; The indication information is message type information;

In a ninth aspect, a transmission method is provided, the transmission method includes: a first network node receives a second message from a terminal device, the second message includes fourth indication information, and the fourth indication information is used to indicate the terminal The device requests system information or a system information block, or the fourth indication information is used to instruct the terminal device to request the establishment of an RRC connection, and the first network node includes a radio link layer control protocol layer, a medium access control layer, and a physical layer function at least one of; or, the first network node receives the second message on the first logical channel or the second logical channel, the message carried on the first logical channel is used to request system information or a system information block, the second The message carried by the logical channel is used to request the establishment of an RRC connection; or, the first network node receives a second message from the terminal device, where the second message uses the first logical channel identifier, or the second message uses the The second logical channel identifier; the first network node sends a third message to the second network node, the third message includes a first container of the second message, and the information of the first container indicates the system information that the terminal device needs to request , the second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

A tenth aspect provides a transmission method, the transmission method comprising: the second network node receives a third message from the first network node, where the third message is used to request the establishment of an RRC connection, or the third message is used for For requesting system information or a system information block, the purpose of the third message is determined according to the information of the first container in the third message; the second network node determines that the second message does not include the second container, and the second The container is an RRC container from the first network node to the second network node; the second network node sends rejection indication information to the terminal device through the first network node, and the rejection indication information is used to indicate that the terminal device is rejected to establish an RRC connection .

In some possible implementations, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or the second network node includes a radio resource control protocol at least one of a layer, a service data adaptation layer and a packet data convergence protocol layer.

In some possible implementations, the method further includes: the second network node receives a third message from the first network node, where the third message is used to request system information or a system information block, and the purpose of the third message is to Determined according to the information of the first container in the third message; the second network node determines that the information of the first container indicates the system information or system information block that the terminal device needs to request; the second network node The network node sends system information request response information or bitmap indication information to the terminal device, where the bitmap indication information is used to indicate the system information or system information block sent to the terminal device.

In some possible implementations, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or the second network node includes a radio resource control protocol at least one of a layer, a service data adaptation layer and a packet data convergence protocol layer.

In some possible implementations, the information of the first container is a message type.

In an eleventh aspect, a network device is provided for executing the method in the first aspect or any possible implementation manner of the first aspect. Specifically, the network device includes a module for executing the method in the first aspect or any possible implementation manner of the first aspect.

A twelfth aspect provides a network device configured to execute the method in the second aspect or any possible implementation manner of the second aspect. Specifically, the network device includes a module for performing the method in the second aspect or any possible implementation manner of the second aspect.

A thirteenth aspect provides a terminal device for executing the third aspect or the method in any possible implementation manner of the third aspect. Specifically, the terminal device includes a module for executing the third aspect or the method in any possible implementation manner of the third aspect.

In a fourteenth aspect, a network device is provided for executing the method in the fourth aspect or any possible implementation manner of the fourth aspect. Specifically, the network device includes a module for performing the method in the above-mentioned fourth aspect or any possible implementation manner of the fourth aspect.

A fifteenth aspect provides a network device for executing the method in the fifth aspect or any possible implementation manner of the fifth aspect. Specifically, the network device includes a module for executing the method in the fifth aspect or any possible implementation manner of the fifth aspect.

A sixteenth aspect provides a network device configured to execute the method in the sixth aspect or any possible implementation manner of the sixth aspect. Specifically, the network device includes a module for executing the method in the sixth aspect or any possible implementation manner of the sixth aspect.

A seventeenth aspect provides a network device configured to execute the method in the seventh aspect or any possible implementation manner of the seventh aspect. Specifically, the network device includes a module for performing the method in the above seventh aspect or any possible implementation manner of the seventh aspect.

In an eighteenth aspect, a terminal device is provided, which is configured to execute the method in the eighth aspect or any possible implementation manner of the eighth aspect. Specifically, the terminal device includes a module for executing the method in the above eighth aspect or any possible implementation manner of the eighth aspect.

In a nineteenth aspect, a network device is provided for executing the method in the ninth aspect or any possible implementation manner of the ninth aspect. Specifically, the network device includes a module for executing the method in the above ninth aspect or any possible implementation manner of the ninth aspect.

In a twentieth aspect, a network device is provided for executing the method in the tenth aspect or any possible implementation manner of the tenth aspect. Specifically, the network device includes a module for executing the method in the tenth aspect or any possible implementation manner of the tenth aspect.

A twenty-first aspect provides a network device, the network device includes a memory, a transceiver, and at least one processor, the memory, the transceiver, and the at least one processor are interconnected through a line, and the transceiver uses In performing the method in the first aspect and any possible implementation manner of the first aspect, the operation of sending and receiving messages performed at the first network node; the at least one processor invokes the stored data stored in the memory; The instruction is executed, and the processing operation performed on the first network node in the method in the first aspect and any possible implementation manner of the first aspect is executed.

A twenty-second aspect provides a network device, the network device includes a memory, a transceiver, and at least one processor, the memory, the transceiver, and the at least one processor are interconnected through a line, and the transceiver uses In performing the method in the second aspect and any possible implementation manner of the second aspect, the operation of message sending and receiving performed at the second network node; the at least one processor invokes the stored data in the memory; The instruction is executed, and the processing operation performed on the second network node in the method in the second aspect and any possible implementation manner of the second aspect is executed.

A twenty-third aspect provides a terminal device, the terminal device includes a memory, a transceiver and at least one processor, the memory, the transceiver and the at least one processor are interconnected through a line, and the transceiver uses In executing the third aspect and the method in any possible implementation manner of the third aspect, the operation of sending and receiving a message performed by the terminal device; the at least one processor invokes the instruction stored in the memory , execute the processing operation performed by the terminal device in the third aspect and the method in any possible implementation manner of the third aspect.

A twenty-fourth aspect provides a network device, the network device includes a memory, a transceiver, and at least one processor, the memory, the transceiver, and the at least one processor are interconnected through a line, and the transceiver uses In performing the method in the fourth aspect and any possible implementation manner of the fourth aspect, the operation of sending and receiving messages performed at the first network node; the at least one processor invokes the stored data in the memory; The instruction is executed, and the processing operation performed on the first network node in the method in the fourth aspect and any possible implementation manner of the fourth aspect is performed.

A twenty-fifth aspect provides a network device, the network device includes a memory, a transceiver, and at least one processor, the memory, the transceiver, and the at least one processor are interconnected through a line, and the transceiver uses In performing the method in the fifth aspect and any possible implementation manner of the fifth aspect, the operation of sending and receiving messages performed at the second network node; the at least one processor invokes the stored data in the memory; The instruction is executed, and the processing operation performed on the second network node in the method in the fifth aspect and any possible implementation manner of the fifth aspect is performed.

A twenty-sixth aspect provides a network device, the network device includes a memory, a transceiver, and at least one processor, the memory, the transceiver, and the at least one processor are interconnected through a line, and the transceiver uses In performing the method in the sixth aspect and any possible implementation manner of the sixth aspect, the operation of sending and receiving a message performed at the first network node; the at least one processor invokes the stored data in the memory; The above instruction is used to execute the processing operation performed on the first network node in the method in the sixth aspect and any possible implementation manner of the sixth aspect.

A twenty-seventh aspect provides a network device, the network device includes a memory, a transceiver, and at least one processor, the memory, the transceiver, and the at least one processor are interconnected through a line, and the transceiver uses In performing the method in the seventh aspect and any possible implementation manner of the seventh aspect, the operation of sending and receiving a message performed at the second network node; the at least one processor invokes the stored data in the memory. The instruction is executed, and the processing operation performed on the second network node in the method in the seventh aspect and any possible implementation manner of the seventh aspect is performed.

A twenty-eighth aspect provides a terminal device, the terminal device includes a memory, a transceiver, and at least one processor, the memory, the transceiver, and the at least one processor are interconnected through a line, and the transceiver uses In performing the method in the eighth aspect and any possible implementation manner of the eighth aspect, the operation of sending and receiving a message performed by the terminal device; the at least one processor invokes the instruction stored in the memory , performing the processing operations performed on the terminal device in the eighth aspect and the method in any possible implementation manner of the eighth aspect.

A twenty-ninth aspect provides a network device, the network device includes a memory, a transceiver, and at least one processor, the memory, the transceiver, and the at least one processor are interconnected through a line, and the transceiver uses In performing the method in the ninth aspect and any possible implementation manner of the ninth aspect, the operation of sending and receiving a message performed at the first network node; the at least one processor invokes the stored data in the memory; The instruction is executed, and the processing operation performed on the first network node in the method in the ninth aspect and any possible implementation manner of the ninth aspect is performed.

In a thirtieth aspect, a network device is provided, the network device includes a memory, a transceiver and at least one processor, the memory, the transceiver and the at least one processor are interconnected by a line, the transceiver is used for In performing the method in the tenth aspect and any possible implementation manner of the tenth aspect, the operation of sending and receiving a message performed by the second network node; the at least one processor invokes the message stored in the memory The instruction executes the processing operation performed on the second network node in the method in the tenth aspect and any possible implementation manner of the tenth aspect.

A thirty-first aspect provides a transmission method, the method comprising: a control plane node receives fifth indication information sent by a user plane node, where the fifth indication information is used to indicate a radio link failure of the first network node; the control The plane node determines whether to switch the first network node according to the fifth indication information; wherein, the protocol stack structure of the control plane node is at least one of a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer. and/or the protocol stack architecture of the first network node is at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function.

A thirty-second aspect provides a transmission method, the method comprising: a user plane node sending fifth indication information to a control plane node, where the fifth indication information is used to indicate a radio link failure of the first network node; wherein, The protocol stack architecture of the user plane node is at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer; and/or the protocol stack architecture of the first network node is a radio link layer control layer At least one of protocol layer, medium access control layer and physical layer functions.

With reference to the thirty-second aspect, in some possible implementation manners of the thirty-second aspect, the method further includes: the user plane node receiving a user plane interface message sent by the first network node, the user plane interface message using for indicating a radio link failure of the first network node.

A thirty-third aspect provides a transmission method, the method comprising: the first control plane node sending sixth indication information to the first user plane node, where the sixth indication information is used to trigger allocation of a data forwarding address of the first bearer ; the first control plane node receives the data forwarding address sent by the first user plane node; wherein, the protocol stack architecture of the first control plane node is a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol at least one of the layers.

With reference to the thirty-third aspect, in some possible implementation manners of the thirty-third aspect, the method further includes: the data forwarding address sent by the first control plane node to the second user plane node.

With reference to the thirty-third aspect, in some possible implementations of the thirty-third aspect, the method further includes: the first control plane node sends the data to the second user plane node through the second control plane node forwarding address.

According to a thirty-fourth aspect, a network device is provided for performing the method of the thirty-first aspect or any possible implementation manner of the thirty-first aspect. Specifically, the network device includes a module for performing the method in the above thirty-first aspect or any possible implementation manner of the thirty-first aspect.

According to a thirty-fifth aspect, a network device is provided for executing the method of the thirty-second aspect or any possible implementation manner of the thirty-second aspect. Specifically, the network device includes a module for performing the method in the above thirty-second aspect or any possible implementation manner of the thirty-second aspect.

According to a thirty-sixth aspect, a network device is provided for executing the method of the thirty-third aspect or any possible implementation manner of the thirty-third aspect. Specifically, the network device includes a module for performing the method in the above thirty-third aspect or any possible implementation manner of the thirty-third aspect.

In a thirty-seventh aspect, a network device is provided, the network device includes a memory, a transceiver and at least one processor, the memory, the transceiver and the at least one processor are interconnected by a line, and the transceiver uses In performing the method in any one possible implementation manner of the thirty-first aspect and the thirty-first aspect, the operation of sending and receiving a message performed by the control plane node; the at least one processor calls the memory in the memory. The stored instruction executes the processing operation performed on the control plane node in the method in any one possible implementation manner of the thirty-first aspect and the thirty-first aspect.

In a thirty-eighth aspect, a network device is provided, the network device includes a memory, a transceiver and at least one processor, the memory, the transceiver and the at least one processor are interconnected by a line, and the transceiver uses In performing the method in any possible implementation manner of the thirty-second aspect and the thirty-second aspect, the operation of sending and receiving a message performed by the user plane node; the at least one processor calls the memory in the memory. The stored instruction executes the processing operation performed on the user plane node in the method in any one possible implementation manner of the thirty-second aspect and the thirty-second aspect.

A thirty-ninth aspect provides a network device, the terminal device includes a memory, a transceiver and at least one processor, the memory, the transceiver and the at least one processor are interconnected through a line, and the transceiver uses In performing the method in any possible implementation manner of the thirty-third aspect and the thirty-third aspect, the operation of sending and receiving a message performed at the first control plane node; the at least one processor invokes the The instructions stored in the memory execute the processing operations performed on the first control plane node in the method in any possible implementation manner of the thirty-third aspect and the thirty-third aspect.

In a fortieth aspect, a chip system is provided, which is applied to a network device. The chip system includes: at least one processor, at least one memory, and an interface circuit, where the interface circuit is responsible for information interaction between the chip system and the outside world, The at least one memory, the interface circuit, and the at least one processor are interconnected by wires, and instructions are stored in the at least one memory; the instructions are executed by the at least one processor to perform all of the above aspects. operations of the first network node or the second network node in the method described above.

In a forty-first aspect, a communication system is provided, including: a network device, and/or a terminal device; wherein, the network device is the network device described in the above aspects.

A forty-second aspect provides a computer program product for use in a network device, the computer program product includes a series of instructions, when the instructions are executed, to perform the methods described in the above aspects. operations of the first network node, the second network node, the control plane node or the user plane node.

In a forty-third aspect, a computer-readable storage medium is provided, and instructions are stored in the computer-readable storage medium, which, when executed on a computer, cause the computer to perform the methods of the above aspects.

Description of drawings

FIG. 1 is a schematic diagram of an application scenario of the technical solutions of the embodiments of the present application.

FIG. 2 is a schematic diagram of another application scenario of the technical solutions of the embodiments of the present application.

FIG. 3 is a schematic diagram of still another application scenario of the technical solution of the embodiment of the present application.

FIG. 4 is a schematic diagram of still another application scenario of the technical solution of the embodiment of the present application.

FIG. 5 is a schematic diagram of still another application scenario of the technical solution of the embodiment of the present application.

FIG. 6 is a schematic flowchart of a transmission method according to an embodiment of the present application.

FIG. 7 is another schematic flowchart of a transmission method according to an embodiment of the present application.

FIG. 8 is a mapping relationship diagram of SI and SIB.

FIG. 9 is still another schematic flowchart of a transmission method according to an embodiment of the present application.

FIG. 10 is another schematic flowchart of the transmission method according to the embodiment of the present application.

FIG. 11 is another schematic flowchart of the transmission method according to the embodiment of the present application.

FIG. 12 is another schematic flowchart of the transmission method according to the embodiment of the present application.

FIG. 13 is another schematic flowchart of the transmission method according to the embodiment of the present application.

FIG. 14 is a schematic diagram of a MAC protocol layer of an RRC message.

FIG. 15 is another schematic flowchart of a transmission method according to an embodiment of the present application.

FIG. 16 is another schematic flowchart of a transmission method according to an embodiment of the present application.

FIG. 17 is another schematic flowchart of a transmission method according to an embodiment of the present application.

FIG. 18 is a schematic block diagram of a network device according to an embodiment of the present application.

FIG. 19 is another schematic block diagram of a network device according to an embodiment of the present application.

FIG. 20 is a schematic block diagram of a terminal device according to an embodiment of the present application.

FIG. 21 is still another schematic block diagram of a network device according to an embodiment of the present application.

FIG. 22 is another schematic block diagram of a network device according to an embodiment of the present application.

FIG. 23 is still another schematic block diagram of a network device according to an embodiment of the present application.

FIG. 24 is still another schematic block diagram of a network device according to an embodiment of the present application.

FIG. 25 is another schematic block diagram of a terminal device according to an embodiment of the present application.

FIG. 26 is another schematic block diagram of a network device according to an embodiment of the present application.

FIG. 27 is still another schematic block diagram of a network device according to an embodiment of the present application.

FIG. 28 is still another schematic block diagram of a network device according to an embodiment of the present application.

FIG. 29 is a schematic block diagram of a communication device according to an embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The embodiments of the present application are applicable to various forms of systems including partial function separation in network devices. FIG. 1 shows a schematic diagram of an application scenario of the technical solutions of the embodiments of the present application. As shown in FIG. 1 , in the network device Part of the functionality is separated into a first network node and a second network node.

Specifically, FIG. 2 shows a schematic diagram of another application scenario of the technical solutions of the embodiments of the present application. As shown in FIG. 2 , in the CRAN architecture, CU-DU segmentation is introduced, and the DU may correspond to FIG. 1 . The first network node in the CU corresponds to the second network node in FIG. 1 .

It should be understood that the first network node and the second network node may be two physically or logically separated modules in an overall network architecture, or may be two completely independent logical network elements.

It should also be understood that the second network node may separate the control plane and the user plane to form the user plane of the second network node and the control plane of the second network node.

The CU has radio resource control (Radio Resource Control, RRC) or part of the RRC control function, including all the protocol layer functions or part of the protocol layer functions of the existing base station; for example, only includes the RRC function or part of the RRC function, or includes the RRC function or service Data Adaptation Protocol (Service Data Adaptation Protocol, SDAP) layer function, or includes RRC/Packet Data Convergence Protocol (Packet Data Convergence Protocol, PDCP) layer function, or includes RRC/PDCP and some Radio Link Layer Control Protocol (Radio Link) Control, RLC) layer function; or include RRC/PDCP/Media Access Control (Media Access Control, MAC) layer, or even some or all of the physical layer PHY functions, do not exclude any other possibility.

DU has all or part of the protocol layer functions of the existing base station, that is, some protocol layer functional units of RRC/SDAP/PDCP/RLC/MAC/PHY, such as including some RRC functions and PDCP/RLC/MAC/PHY and other protocol layer functions, Or include protocol layer functions such as PDCP/RLC/MAC/PHY, or include protocol layer functions such as RLC/MAC/PHY, or include some RLC/MAC/PHY functions, or only include all or part of PHY functions; it should be noted that the The functions of the various protocol layers mentioned above may change, which are all within the scope of protection of this application.

It should be understood that in this embodiment of the present application, different protocol layers may be deployed in the first network node and the second network node respectively, and a possible implementation manner is that at least the first protocol layer is deployed in the second network node and the second protocol layer, deploying at least the third protocol layer and the fourth protocol layer in the first network node,

For example, the first protocol layer may be the RRC layer, the second protocol layer may be the PDCP layer, the third protocol layer may be the MAC layer, and the fourth protocol layer may be the PHY layer.

It should be understood that the above enumeration of the first protocol layer, the second protocol layer, the third protocol layer and the fourth protocol layer is only an exemplary illustration, and should not constitute any limitation to the present application. The first protocol layer and the second protocol layer may also be existing protocols (eg, LTE protocol) or other protocol layers defined in future protocols, which are not particularly limited in this application.

For another example, in the 5G network, the new type of relay node also has new technological progress. For example, the relay node is only deployed with layer 2 (for example, including the radio link control (RLC) layer, MAC layer, etc.) and the protocol stack architecture of layer 1 (eg, including the PHY layer), without deploying all protocol stack functions above layer 2, such as all RRC layer functions. Therefore, the data or signaling generated by the donor base station needs to be forwarded by the relay node to the terminal device.

It should be understood that the first network node in this embodiment of the present application may correspond to a DU in the CU-DU architecture, or may correspond to the above-mentioned relay node, and the second network node may correspond to a CU in the CU-DU architecture, or may Corresponding to the above-mentioned donor base station, or the CU and DU correspond to the above-mentioned donor base station, the DU and the UE are transmitted through one relay node or multiple relay nodes, and the last hop relay node of the UE corresponds to the first network node.

FIG. 3 shows a schematic diagram of still another application scenario of the technical solution according to the embodiment of the present application. As shown in FIG. 3 , the technical solution of the embodiment of the present application is applicable to the NR CU-DU architecture system, and for the NR CU-DU system Under the architecture, the interface between the CU and the DU is the F1 interface, the interface between the base station 1 (gNB1) and the base station 2 (gNB2) is the Xn interface, and the interface between the base station and the core network (5GC) is the NG interface.

4 and 5 show schematic diagrams of still another application scenario of the technical solution according to the embodiment of the present application. As shown in FIG. 4 , the technical solution of the embodiment of the present application is applicable to an LTE CU-DU architecture system, and the difference lies in the CU The V1 interface is similar to the F1 interface. The interface between the base stations (eNB) is the X2 interface. The CU can be connected to the core network EPC or the NR core network 5GC.

It should be understood that the current 3rd Generation Partnership Project (3GPP) names the interface between the CU-DU as F1, and the F1 interface includes a control plane (Control Plane, CP) and a user plane (User Plane, UP). ), the transport layer protocol of the control plane is Stream Control Transmission Protocol (SCTP), and the transmitted application layer message is F1AP (Application Protocol) message. The transport layer protocol of the user plane is the GPRS Tunnelling Protocol-Userplane (GTP-U) of the user plane.

It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, for example: a Global System of Mobile Communication (GSM) system, a Code Division Multiple Access (CDMA) system, a wideband code division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD), Universal Mobile Communication system (Universal Mobile Telecommunication System, UMTS), future 5th-Generation (5th-Generation, 5G) communication system, CRAN and other communication systems.

It should also be understood that the network device in this embodiment of the present application may be a device for communicating with a terminal device, for example, may be a base station (Base Transceiver Station, BTS) and a base station controller (BaseStation Controller, BSC) in a GSM system or CDMA ), it can also be a base station (NodeB, NB) and a radio network controller (Radio Network Controller, RNC) in a WCDMA system, or an evolved base station (EvolutionalNode B, eNB or eNodeB) in an LTE system, or The network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, and an access network device in a future 5G network, such as a next-generation base station, or a future evolved Public Land Mobile Network (PLMN) network. access network equipment, etc.

Specifically, in the UMTS system in the third-generation mobile communication technology (3rd-Generation, 3G), there is a scenario in which the wireless network control node and the base station are separated; in the LTE system, there is a scenario in which the baseband module and the radio frequency module are separated, that is, the radio frequency The remote scenario; the Data Center (DC) scenario, which requires interconnection between two different networks; the large and small station scenarios, where there are interfaces connected to each other; LTE-Wifi aggregation (LWA) scenarios; In the 5G system, there are various non-cell scenarios (terminals can switch freely between cells, and there is no clear boundary between cells), and there is a control node connected to all cells, or under a cell Connecting each transmission node; CRAN scenario, there is a scenario of BBU segmentation; CRAN virtualization scenario, a certain part of the BBU function is centrally deployed and virtualized, and another part of the function is deployed separately, and there is a possibility of physical separation between the two parts; It is understood that scenarios where different systems/standards coexist are within the scope of application of this application.

Various embodiments are described herein in conjunction with terminal devices. Terminal equipment may also refer to User Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication function handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or terminal devices in PLMN, etc.

FIG. 6 is a schematic flowchart of a transmission method 100 according to an embodiment of the present application. As shown in FIG. 6 , the first network node in the transmission method 100 may be the first network node in FIG. 1 , and may also be the first network node in FIG. 2 In the DU in the transmission method 100, the second network node in the transmission method 100 may be the second network node in FIG. 1, or the CU in FIG. 2. The method 100 includes:

S110, the second network node determines the effective area of each system information in the at least one system information;

S120, the second network node sends first indication information to the first network node, and the first network node receives the first indication information from the second network node, where the first indication information can be used to indicate the at least one The valid area of each system information in the system information;

S130, the first network node sends the at least one system information and the first indication information to a terminal device, and the terminal device receives the at least one system information and the first indication information from the first network node, so as to facilitate the The terminal device learns the valid area to which the at least one system information applies.

It should be understood that the effective area of each system information in the at least one system information may be different from each other, or may be partially the same, or the effective area of each system information may be the same.

Optionally, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or

The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

The types of system information (System Information, SI) may include master information block (MasterInformation Block, MIB), system information block 1 (System Information Block1, SIB1), and other system information other SIs (for example: SIB2 numbered 2 to 22 -SIB22). SI can also be divided into minimum system message MSI and other SIs according to the sending method, wherein MSI mainly includes MIB and SIB1. In particular, the terminal device can request otherSIs, and the network device can send the requested other SIs by way of broadcasting or dedicated RRC signaling. System messages can be divided into multiple system message blocks, and which SIBs each SI block contains can be specified by a protocol, or can be specifically determined by a network device. If the SIBs included in the SI block are determined by the network device, the network device needs to broadcast in the MSI to inform the terminal device.

Specifically, the second network node first determines an effective area (area ID), the effective area is the effective area corresponding to the system information SI, the second network node sends first indication information to the first network node, the first The indication information is used to indicate the effective area of each system information in the at least one system information. After the first network node receives the first indication information from the second network node, the at least one system information and the first indication The information is broadcast to the terminal device, the terminal device receives the at least one system information and the first indication information, the terminal device can know the valid area to which the at least one system information is applied, and when the terminal device moves, the terminal device will obtain new information. The effective area of the system information, if the effective area does not change, the terminal device does not need to re-read the system information.

It can be understood that the first indication information may include the effective area of each system information in the at least one system information, or the first indication information may include the effective area of the system information, or the first indication information may include the effective area of the system information and the bit map information, wherein the bitmap information may be replaced by an indication list (all the bitmap information described in this application may be replaced by an indication list, which will not be repeated below). The bitmap information is a 0/1 bitmap indication (for example, 00001101, etc., where 0 means that the system information is valid in this cell, 1 means that the system information is valid in the cell with the same area ID), and the indication list is a separate , such as SIB2:0, SIB3:1, etc., where 0 indicates that the system information is valid in this cell, and 1 indicates that the system information is valid in the cell with the same area ID.

It can be understood that if the valid area can indicate both the cell level and the area level, for example, the system information can be valid only in the current cell or in the cell with the same area identifier, then the first indication information includes the system information. Effective area and bitmap information; if the effective area only indicates the area level, for example, the system information is only valid in cells with the same area ID, then the first indication information includes the effective area of the system information.

Optionally, the valid area may only include the area identifier area ID, or the valid area may also include the area ID and bitmap information, or the valid area may also include the area ID and indication information, wherein the area ID is an area identifier, which is used to identify the area identifier to which the system information can be applied, that is, each cell has an area ID or each cell has an area ID list, and the bitmap information is a 0/1 bitmap indication (eg , 00001101, etc., where 0 indicates that the system information is valid in this cell, 1 indicates that the system information is valid in the cell with the same area ID), the indication information is a separate indication, such as SIB2:0, SIB3:1, etc., where 0 indicates that the system information is valid in this cell, and 1 indicates that the system information is valid in the cell with the same area ID.

Optionally, the first indication information may be configured by a network operation and maintenance (Operation Administration and Maintenance, OAM) to the second network node or the first network node:

If the OAM configures the first indication information to the second network node, the second network node needs to send the first indication information to the first network node; or

If the OAM configures the first indication information to the first network node, the first network node may directly send the information to the terminal device. Optionally, the area ID of the effective area in the first indication information can be directly configured through OAM, that is, OAM is directly configured to the first network node, and the bitmap information of the effective area in the first indication information is the second one. determined by the network node.

Optionally, the bitmap information of the effective area in the first indication information can be directly configured through OAM, that is, OAM is directly configured to the first network node, and the area ID of the effective area in the first indication information is the second. determined by the network node.

Specifically, the first indication information is used to indicate the valid area of each system information in the at least one system information, that is, the first indication information sent by the second network node to the first network node is each of the at least one system information. The valid area corresponding to the system information, the first indication information only includes the area ID, for example, the cell format is as follows:

IE/Group Name SI list >SI >area ID

or:

IE/Group Name SIB list >SIB >area ID

The cell format is not limited to the above table.

It should be noted that, for the optional item, the area ID may be a value (for example, the area ID is 5), or it may be an ID list, such as (areaID list, 5, 6, 7).

It should also be noted that, for the option, after the first network node receives the valid area of the system information sent by the second network node, the first network node may generate a bitmap information.

Optionally, the first indication information is used to indicate the valid area of each system information in the at least one system information, that is, the first indication information sent by the second network node to the first network node is each of the at least one system information. The valid area corresponding to each system information, the first indication information includes area ID and bitmap information, such as the cell format is as follows:

or:

IE/Group Name SIB list >SIB >area ID Bitmap

The cell format is not limited to the above table.

It should be noted that, for the optional item, the area ID may be a value (for example, the area ID is 5), or it may be an ID list, such as (areaID list, 5, 6, 7).

It should also be noted that, for the optional option, after the first network node receives the valid area of the system information and the bitmap information sent by the second network node, the first network node can also modify the bitmap information.

Optionally, the first indication information is used to indicate the effective area of the system information, that is, the first indication information sent by the second network node to the first network node is the effective area of the system information, and the first indication information only Including the areaID, the area IDs corresponding to all system information or all system information blocks are the same.

Table 1 Cell list of the first indication information

IE/Group Name SI list >SI area ID

or:

Table 2 Another cell list of the first indication information

IE/Group Name SIB list >SIB area ID

The cell format is not limited to the above table.

It should be noted that, for the optional item, the area ID may be a value (for example, the area ID is 5), or it may be an ID list, such as (areaID list, 5, 6, 7).

It should also be noted that, for the option, after the first network node receives the valid area of the system information sent by the second network node, the first network node may generate a bitmap information.

Optionally, the first indication information also indicates a valid area of system information, that is, the first indication information sent by the second network node to the first network node is the valid area of system information, all system information or all system information. The area IDs corresponding to the information blocks are all the same. Table 3 and Table 4 show the cell lists of the two kinds of first indication information, as shown in Table 3 and Table 4.

Table 3 Still another cell list of the first indication information

or:

Table 4 Yet another cell list of the first indication information

IE/Group Name SIB list area ID Bitmap

The cell format is not limited to the above table.

It should be noted that, for the optional item, the area ID may be a value (for example, the area ID is 5), or it may be an ID list, such as (areaID list, 5, 6, 7).

It should also be noted that, for the optional option, after the first network node receives the valid area of the system information and the bitmap information sent by the second network node, the first network node can also modify the bitmap information.

Specifically, the bitmap information is used to indicate an area to which the system information is applicable, that is, some system information is applicable to this cell, and some system information is applicable not only to this cell, but also to other cells. (For example, there are 4 SIs in other SIs, and 22 SIBs. If the bitmap indicates SI granularity, the number of bits in the bitmap is 4-bit 0/1 indication, such as the indication can be 0110, 0 means that the system information is in this The cell is valid, 1 means that the system information is valid in the cell with the same area ID, the position of the 0110 corresponds to the number of the SI one-to-one, and it can also be a protocol definition, which is not limited in the present invention; if the bitmap indicates SIB granularity, then The bitmap indication can be a series of 22-bit 0/1 indications, for example, the indication can be 0011…..1001, 0 means the system information is valid in this cell, 1 means the system information is valid in the cell with the same area ID, the 22 bits The position of the SIB corresponds to the number of the SIB one-to-one, and it can also be a protocol definition, which is not limited in this application).

After receiving the system information and the first indication information sent by the second network node, the first network node sends the system information and the first indication information to the terminal device. Specifically, the first network node sends the system information, area ID and bit information to the terminal device. At least one of the picture information is sent to the terminal device. When the first indication information is the bitmap and the area ID, after the terminal device receives the bitmap and the area ID, if the bitmap value corresponding to the system information to be read is 0, it is considered that the read system information is valid in the cell , the system information needs to be read again after moving to another cell; if the bitmap value corresponding to the system information to be read is 1, it is considered that the read system information is valid in the cell with the area ID, for example, if the area ID is 6 If the area ID is 6, the terminal device does not need to read the system information again.

Specifically, the area ID and bitmap information may be carried in the F1AP message sent by the CU to the DU, for example, may be carried in the F1setup response message, or may be carried in the gNB-CU configurationupdate message sent by the CU to the DU, or, It can be carried in the gNB-DU configuration update acknowledge message of the gNB-DU, or it can also be carried in other existing messages of F1AP, or it can also be carried in a new F1AP message, which is not limited in this application.

It should be noted that, the valid area (area ID) may be cell ID (PCI)/cell ID list (PCIlist), or may be an integer number such as 1/2/3.

It should be noted that the area ID involved in this application means that each cell has an area ID, and the area ID may be an integer number.

It should be understood that the protocol stack architecture of the first network node may be at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function, and the protocol stack architecture of the second network node may be a radio resource At least one of a control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

It should also be understood that the area ID may be in one-to-one correspondence with the cells, that is, the area ID may be a cell ID, a cell list, or an integer number such as 1/2/3.

It should also be understood that the area ID may also be in one-to-one correspondence with the base station, that is, the area ID may be a gNB ID, a gNB list, or an integer number such as 1/2/3.

Table 5 shows a cell list of the first indication information, as shown in Table 5.

Table 5 Cell list of the first indication information

It should be understood that, in the IE identification information element in Table 5, Group Name represents a group name.

It should also be understood that the first network node may be the gNB-DU in FIG. 3 , or the first network node may be the eNB-DU in FIG. 4 or FIG. 5 , and the second network node may be the gNB-DU in FIG. 3 . The gNB-CU, or the first network node may be the eNB-CU in FIG. 4 or FIG. 5 .

For example, the first network node may be the gNB-DU in FIG. 3 , the second network node may be the gNB-CU in FIG. 3 , the gNB-CU may carry the first indication information through the F1 interface message, and the gNB-DU starts The F1 interface setup sends an F1 interface setup request (F1setup request) message to the gNB-CU, and the F1 interface setup request response (F1setup response) message returned by the gNB-CU to the gNB-DU carries the first indication information.

For another example, the first network node may be the gNB-DU in FIG. 3 , the second network node may be the gNB-CU in FIG. 3 , and the gNB-CU may carry the gNB-DU in the response to the configuration update message of the gNB-DU The first indication information, the gNB-DU starts the gNB-DU update process, sends a gNB-DU configuration update (configuration update) message to the gNB-CU, and the gNB-CU responds to the configuration update message and sends the gNB-DU configuration update to the gNB-DU The first indication information is carried in an acknowledgement (configuration updateacknowledge) message.

For another example, the first network node may be the gNB-DU in FIG. 3 , the second network node may be the gNB-CU in FIG. 3 , and the gNB-CU may carry the first indication in a configuration update message of the gNB-CU. information, the gNB-CU sends a configuration update message to the gNB-DU, where the configuration update message includes the first indication information.

It should be understood that after receiving the first indication information, the gNB-DU can put the first indication information in SIB1 and broadcast it to the terminal device.

It should be noted that the area ID in this application may be in one-to-one correspondence with the cells, that is, the area ID may be a cell ID, a cell list, or an integer number such as 1/2/3, or It may be an identifier capable of identifying an area defined by other definitions, which is not limited in this application.

In the transmission method of the embodiment of the present application, at least one valid area of system information is determined by the second network node and sent to the terminal device by the first network node, which helps to solve the problem of indicating the valid area of the system information to the terminal device.

Optionally, the transmission method 100 further includes:

The second network node configures closed subscriber group CSG indication information and CSG identification information, where the CSG indication information is used to indicate that the cell of the first network node is a CSG cell, or the CSG indication information is used to indicate that the cell of the first network node is not a CSG cell CSG cell.

The second network node sends the CSG indication information and the CSG identification information to the first network node, and the first network node receives the CSG indication information and the CSG identification information from the second network node.

Specifically, the CSG indication information and the CSG identification information may be configured by the second network node, then the second network node may carry the CSG indication information and the CSG indication information in the message sent by the second network node to the first network node. The CSG identification information is given to the first network node, and the first network node may add the CSG indication information and the CSG identification information to the final system information and broadcast it to the terminal device.

For example, if the CSG cell is configured by the gNB-CU, the gNB-CU can carry the CSG indication information and CSG identification information to the gNB-DU in the F1 interface message, and the gNB-DU can add the CSG indication information and the CSG indication information to the SIB1. CSG identification information and broadcast to terminal equipment.

It should be understood that the CSG cell can be configured by the gNB-DU, then when the gNB-DU triggers the establishment of the F1 interface with the gNB-CU, it can carry the CSG identification information in the F1 interface establishment request message for the gNB-CU to obtain CSG membership status. Specifically, the CSG identification information may be displayed and indicated in the F1 interface message, or may be carried in the SIB1 and indicated to the gNB-CU.

Optionally, for the configuration of the above-mentioned CSG cell, the gNB-CU or gNB-DU may also configure the access mode of the cell. If the cell access mode (cell access mode, there are three access modes closed, open, and hybrid) The function is to control the access of the UE) If it is determined by the gNB-DU, then the DU needs to inform the CU of the cell access mode, which is used to inform the core network when the CU interacts with the core network, and the core network performs access control. . This solution is also applicable to the LTE CU-DU system. Or, if the cell access mode (cell access mode, there are three access modes closed, open, hybrid. The function is to control the access of the UE), if it is determined by the gNB-CU, then the CU needs to inform the cell access mode. DU.

Optionally, the gNB-DU still has some parameters that need to be sent to the gNB-CU (that is, the parameters can only be obtained by the gNB-DU), which are used by the gNB-CU to compile the SIB in other SIs. The specific parameters include:

-Part of the parameters in SIB2: at least one of ac-barring (Access Class Barring), UE timers and constants, frequency information, multiband information, MBSFN subframe configuration, etc.

- Part of parameters in SIB13: MCCH configuration, for which gNB-CU/OAM needs to provide MBSFN area to gNB-DU.

-Part of the parameters in SIB14: EAB (Extended Access Barring) parameters.

-Part of the parameters in SIB16: at least one of GPS time, Coordinated Universal Time (UTC) and the like.

-Part of the parameters in SIB18/19: sidelink communication related resource configuration, for the configuration, gNB-CU/OAM (Operation, Administration and Maintenance, operation and maintenance management system) needs to provide gNB-DU with relevant areas that support sidelink communication .

-Part of the parameters in SIB20: Multimedia Broadcast and Multicast Service (MBMS) transmission control information using single-cell point-to-multipoint technology (SC-PTM)

-Part of the parameters in SIB21: V2X (Vehicle-to-Everything, vehicle IoT) sidelink communication configuration, for which the gNB-CU/OAM needs to provide the gNB-DU with a relevant area that supports sidelink communication.

Or, optionally, the gNB-DU can also have the above-mentioned several SIB compilation functions, that is, after the SIB compiled by the gNB-CU is sent to the gNB-DU, the gNB-DU can modify some parameters in it, that is, recompile and so on.

Optionally, when at least part of the system information in the at least one system information is updated, the transmission method 100 further includes:

The second network node determines second indication information, where the second indication information is used to indicate the at least part of the system information, the system information block in the at least part of the system information, and the data in the valid area of the at least part of the system information at least one;

The second network node sends the second indication information to the first network node, and the first network node receives the second indication information from the second network node.

Specifically, when at least part of the system information in the at least one system information is updated, the second network node may send the second indication information to the first network node, and the first network node receives the second indication information Then, the second indication information is broadcast to the terminal device.

For example, gNB-CU and gNB-DU can exchange their updated system information through F1 interface messages, specifically:

If the system information is updated through the configuration update process of the gNB-DU: the gNB-DU starts the gNB-DU update process, and the gNB-DU sends the gNB-DU configuration update message to the gNB-CU, which includes the system information (MIB) of the gNB-DU. and/or SIB1); the gNB-CU responds to the update of the gNB-DU and sends the gNB-DU configuration updateacknowledge message to the gNB-DU, the message carries the system information of the updated gNB-CU, and the updated system information can be the same as the SIB One-to-one correspondence, or one-to-one correspondence with SI, that is, the updated system information may be of SIB granularity or SI granularity.

Optionally, the configuration update acknowledge message also includes a system information update indication. The update indication may only indicate that the system information is updated, that is, a value tag. If the system information is updated, the value of the value tag is increased by 1, so that the receiving end receives After arrival, it can be identified whether the system information is updated, or the update indication can also specifically indicate which SIB/SI has been updated, that is, SIB granularity or SI granularity, so that the receiving end can directly identify which SIB is received after receiving it. /SI updated. It should be noted that the value tag may be of SIB granularity or SI granularity, that is, the value tag corresponds to SIB or SI one-to-one.

Optionally, the message further includes an area ID, where the area ID is used to indicate an area where the updated system information is valid.

It should be understood that the combination of the area ID and the value tag can indicate whether the system information of a larger range of multiple cells is valid.

If the system information is updated through the configuration update process of the gNB-CU: the gNB-CU starts the gNB-CU update process, and sends a gNB-CU configuration update message to the gNB-DU. The message includes the system information updated by the gNB-CU. -The system information updated by the CU is similar to that described above, that is, it may include one or more of the updated system information SIB/SI, update indication/value tag, and area ID, which will not be repeated here; the gNB-DU response Update the gNB-CU and send the gNB-CU configuration update acknowledge message to the gNB-CU.

The transmission method 100 according to the embodiment of the present application is described in detail above with reference to FIG. 6 . The method 100 introduces how to indicate the effective area of the system information to the terminal device. The following describes the transmission method according to the embodiment of the present application in detail with reference to FIG. 7 . Transmission method 200. The method 200 introduces the process of determining the configuration information of the system information.

FIG. 7 shows a schematic flowchart of a transmission method 200 according to an embodiment of the present application. As shown in FIG. 7 , the first network node in the transmission method 200 may be the first network node in FIG. 1 , or may be For the DU in FIG. 2, the second network node in the transmission method 200 may be the second network node in FIG. 1, and may also be the CU in FIG. 2, and the method 200 includes:

S210: The first network node sends the system information of the first network node to the second network node, and the second network node receives the system information of the first network node sent by the first network node.

For example, the first network node may be the gNB-DU in FIG. 3 , the second network node may be the gNB-CU in FIG. 3 , and the gNB-DU may carry the system information of the gNB-DU in the establishment request message through the F1 interface (The system information is in the form of RRCcontainer), the system information of gNB-DU can be MIB, SIB1, and the content of MIB and SIB1 can be similar to MIB and SIB1 defined by existing LTE/NR. Repeat.

It should be understood that the gNB-DU can also carry the system information of the gNB-DU through the configuration update message of the gNB-DU, and can also carry the system information of the gNB-DU through the configuration update confirmation message of the gNB-DU to the gNB-CU.

It should be understood that the F1 interface setup message, the gNB-DU configuration update message and the gNB-CU configuration update message can all be used to exchange system information, and the exchanged system information may be the same or different.

S220, the second network node sends first configuration information to the first network node, and the first network node receives the first configuration information from the second network node, where the first configuration information includes at least one system information block , at least one of the scheduling information of the at least one system information block, the mapping relationship between the at least one system information and the at least one system information block, and the scheduling period of each system information in the at least one system information.

Optionally, the scheduling information of the at least one system information block includes a scheduling period of each system information block in the at least one system information block, a warning area list of each system information block in the at least one system information block, and the at least one system information block. At least one of the broadcast times for each system information block in the message.

It should be noted that the above steps of S210 and S220 are not in order.

S230, the first network node determines second configuration information, where the second configuration information is used by the first network node to send the at least one system information, and the second configuration information includes the information of each system information in the at least one system information At least one of the window length, the scheduling information of the at least one system information block, the mapping relationship between the at least one system information and the at least one system information block, and the scheduling period of each system information in the at least one system information.

Specifically, the second network node sends the first configuration information to the first network node, where the first configuration information includes at least one system information block, scheduling information of the at least one system information block, the at least one system information and At least one of the mapping relationship of the at least one system information block and the scheduling period of each system information in the at least one system information, after the first network node receives the first configuration information from the second network node, The first network node determines the second configuration information, the second configuration information is used by the first network node to send the at least one system information, and the second configuration information includes a window of each system information in the at least one system information at least one of the length, the scheduling information of the at least one system information block, the mapping relationship between the at least one system information and the at least one system information block, and the scheduling period of each system information in the at least one system information.

In the following, the first network node is the gNB-DU in FIG. 3 and the second network node is the gNB-CU in FIG. 3 as an example. interact.

For example, the gNB-CU sends the first configuration information to the gNB-DU, and the gNB-DU receives the first configuration information sent by the gNB-CU, and the first configuration information is the SIB (except MIB and SIB1) in all Other SIs other SIBs, such as SIB2, SIB3, SIB4...) and the scheduling information of the SIBs in all the Other SIs, wherein the scheduling information of the SIBs in the other SIs is optional.

Table 6 shows a kind of cell information of the first configuration information, as shown in Table 6.

Table 6 Cell information of the first configuration information

It should be understood that the SIB type in Table 6 may be SIB2, SIB3, etc., and the SIB message may also be called SIBcontainer, and the specific content is similar to the definition in LTE/NR, which is not repeated here for brevity.

It should also be understood that when the gNB-CU sends Other SIs (other SIBs except MIB and SIB1, such as SIB2, SIB3, SIB4...) to the gNB-DU, it needs to send the scheduling information of the specific SIBs in the Other SIs to the gNB- DU, the scheduling information of the specific SIB in the Other SIs may be at least the scheduling period/transmission period of the specific SIB in the Other SIs, the early warning area list of the specific SIB in the Other SIs, and the broadcast times of the specific SIB in the Other SIs. part.

It should also be understood that the early warning area list of the SIB can be a cell list, a tracking area list and an emergency area list. Specifically, the cell identifier can be a global cell identifier (Cell Global Identifier, CGI), and the tracking area list is a tracking area identifier. (Tracking Area identity, TAI) and other identification information.

It should also be understood that the scheduling period/transmission period of the specific SIB in the Other SIs, the early warning area list of the specific SIB in the Other SIs and the broadcast times of the specific SIB in the Other SIs are mainly applicable to SIB10, SIB11 and SIB12, which are used for earthquake early warning In other scenarios, when the gNB-DU receives the configuration information, it can be used directly or used as a reference, and this application is not limited to this.

After receiving the first configuration information, the gNB-DU can determine the second configuration information, where the second configuration information is the SI window length (SI-windowlength) in other SIs, the mapping relationship between SI and SIB, and the SI scheduling period (SI-periodicity).

It should be understood that the mapping relationship between the SI and the SIB is the specific SIB type (SIB-mappinginfo) included in the corresponding SI.

It should also be understood that the gNB-DU may refer to the scheduling information of the SI in the Other SIs sent by the gNB-CU, or may use it as a reference to re-determine the scheduling information of the SI in the Other SIs by itself.

Figure 8 shows a mapping relationship between SI and SIB. As shown in Figure 8, after the gNB-DU receives the scheduling information of the SIB sent by the gNB-CU, it determines the SI according to the transmission period of the SI and the scheduling information of the SIB. The mapping relationship with SIB, for example, gNB-DU determines that the transmission period of SI1 is 160ms, and the transmission period of SIB2 and SIB3 is also 160ms, then gNB-DU puts SIB2 and SIB3 in SI1 and broadcasts it to terminal equipment; gNB-DU determines The transmission period of SI2 is 320ms, and the transmission period of SIB4 and SIB5 is also 320ms, then gNB-DU puts SIB4 and SIB5 in SI2 and broadcasts it to terminal equipment; gNB-DU determines that the transmission period of SI3 is 320ms, and the transmission period of SIB6 is also is 320ms, then gNB-DU puts SIB6 in SI3 and broadcasts it to terminal equipment; gNB-DU determines that the transmission period of SI4 is 640ms, and the transmission period of SIB6 is also 640ms, then gNB-DU puts SIB7 in SI4 and broadcasts it to the terminal equipment, and at the same time, the determined mapping relationship between SI and SIB should be placed in SIB1 and broadcast to the terminal equipment.

It should be understood that each SI is only transmitted in one SI window: (1) One SI is associated with one SI window, and only this SI can be sent in the SI window and can be sent repeatedly (how many times, in which subframes) (2) SI windows are next to each other (if adjacent), neither overlapping nor having gaps; (3) ) The SI window lengths of all SIs are the same; (4) the periods of different SIs are independent of each other.

It should also be understood that if the other SIs can be encoded by the gNB-DU, then the gNB-DU determines the SI configuration and directly encodes and broadcasts it. Otherwise, if the other SIs are encoded by the gNB-CU, then the gNB-DU also needs to encode the determined SIs. The mapping relationship between the SI and SIB is informed to the gNB-CU, which is encoded by the gNB-CU and then sent to the gNB-DU, and broadcast by the DU (it should be understood that the meaning of the encoding can be understood as who generated each SI of the other SIs .)

For another example, the gNB-CU sends the first configuration information to the gNB-DU, and the gNB-DU receives the first configuration information sent by the gNB-CU, where the first configuration information is all Other SIs and scheduling of all Other SIs The mapping relationship between information, SI and SIB.

Table 7 shows a kind of cell information of the first configuration information, as shown in Table 7.

Table 7 Cell information of the first configuration information

It should be understood that the SI IDs in Table 7 may be SI1, SI2, etc. The specific SIBs included in the SI are determined by the gNB-CU. The specific content of the SIBs is similar to the definition in LTE/NR. For brevity, details are not repeated here.

After receiving the first configuration information, the gNB-DU may determine the second configuration information, the SI window length (SI-windowlength) of the second configuration information, and the scheduling period of the SI.

For another example, the NB-CU sends the first configuration information to the gNB-DU, and the gNB-DU receives the first configuration information sent by the gNB-CU, where the first configuration information is all Other SIs and scheduling of all Other SIs Information, the mapping relationship between SI and SIB, and the scheduling period of SI.

Table 8 shows a kind of cell information of the first configuration information, as shown in Table 8.

Table 8 Cell information of the first configuration information

After receiving the first configuration information, the gNB-DU may determine the second configuration information, the SI window length (SI-windowlength) of the second configuration information.

It should be understood that the interaction of the above-mentioned system information can also be replaced by a gNB-DU configuration update message, that is, the gNB-DU starts the gNB-DU update process, and sends a gNB-DU configuration update message to the gNB-CU, which includes the gNB-DU configuration update message. System information (the system information is in the form of an RRC container), the gNB-CU responds to the update of the gNB-DU and sends a gNB-DU configuration update acknowledge message to the gNB-DU, and the message includes the first configuration information (the said The system information is in the form of an RRC container), wherein the system information of the gNB-DU and the first configuration information are the same as those described above, and are not repeated here for brevity.

It should also be understood that the interaction of the above-mentioned system information can also be replaced by a gNB-CU configuration update message, that is, the gNB-CU starts the gNB-CU update process, and sends a gNB-CU configuration update message to the gNB-DU, which includes the first gNB-CU configuration update message. Configuration information (the first configuration information is in the form of an RRC container), the gNB-DU responds to the update of the gNB-CU and sends a gNB-CU configuration update acknowledge message to the gNB-CU, and the message includes the system information of the gNB-DU (Optionally, the system information is in the form of an RRC container), wherein the system information of the gNB-DU and the first configuration information are the same as those described above, and for brevity, they are not repeated here.

S240, the first network node sends the at least one system information to the terminal device, and the terminal device receives the at least one system information sent by the first network node.

In the transmission method of the embodiment of the present application, the first network node receives the configuration information of the system information of the second network node, which helps the first network node to determine the final configuration information of the at least one system information, so as to broadcast the system information to the terminal device .

It should be understood that the first indication information in the method 100 and the first configuration information in the method 200 may be carried in the messages (F1setup update message and configuration update message) sent by the gNB-CU to the gNB-DU at the same time, and the gNB-CU sends the gNB-CU to the gNB-DU. - The list of possible cells sent by the DU is shown in Table 9, Table 10 and Table 11.

Table 9 List of possible cells sent by gNB-CU to gNB-DU

Table 10 List of possible cells sent by gNB-CU to gNB-DU

Table 11 List of possible cells sent by gNB-CU to gNB-DU

It should be understood that the list of possible information elements sent by the gNB-CU to the gNB-DU may also be shown in Table 12, Table 13 and Table 14.

Table 12 List of possible cells sent by gNB-CU to gNB-DU

Table 13 List of possible cells sent by gNB-CU to gNB-DU

Table 14 List of possible cells sent by gNB-CU to gNB-DU

It should be noted that the bitmaps in Table 12, Table 13, and Table 14 are optional.

It should also be understood that the list of possible information elements sent by the gNB-CU to the gNB-DU may also be shown in Table 15, Table 16 and Table 17.

Table 15 List of possible cells sent by gNB-CU to gNB-DU

Table 16 List of possible cells sent by gNB-CU to gNB-DU

Table 17 List of possible cells sent by gNB-CU to gNB-DU

It should be noted that the bitmaps in Table 15, Table 16, and Table 17 are optional.

It should also be noted that if the area ID in the above table can be a value or a list, if the area ID is a value, the area ID of the cell is the area ID; if the area ID is a list, then The cell also needs to be configured with an area ID', where the area ID' is used to indicate the area ID of the cell. Take Table 18 as an example:

Table 18 List of possible cells sent by gNB-CU to gNB-DU

The transmission method 200 according to the embodiment of the present application is described above with reference to FIG. 7 . The configuration of the system information in the method 200 is determined by the first network node. The following describes the transmission method 300 and the method 300 of the embodiment of the present application with reference to FIG. 9 . The configuration of the system information in the network is determined by the second network node.

FIG. 9 shows a schematic flowchart of a transmission method 300 according to an embodiment of the present application. As shown in FIG. 9 , the first network node in the transmission method 300 may be the first network node in FIG. 1 , or may be For the DU in FIG. 2 , the second network node in the transmission method 300 may be the second network node in FIG. 1 or the CU in FIG. 2 , and the method 300 includes:

S310, the first network node sends the system information of the first network node to the second network node, and the second network node receives the system information from the first network node;

S320, the second network node determines third configuration information, where the third configuration information includes the window length of each system information in the at least one system information, the scheduling information of the at least one system information block, the at least one system information, and the at least one At least one of the mapping relationship of the system information blocks and the scheduling period of each system information in the at least one piece of system information.

Specifically, the first network node sends the system information of the first network node to the second network node, and the second network node determines the third configuration information, where the third configuration information includes each of the at least one system information At least one of the window length of the system information, the scheduling information of the at least one system information block, the mapping relationship between the at least one system information and the at least one system information block, and the scheduling period of each system information in the at least one system information.

It should be noted that the above steps of S310 and S320 are not in order.

In the following, the first network node is the gNB-DU in FIG. 3 and the second network node is the gNB-CU in FIG. 3 as an example. The gNB-DU and the gNB-CU exchange system information through F1 interface messages. .

For example, an F1 interface setup message or a gNB-CU/gNB-DU configuration update message is used between the gNB-CU and the gNB-DU, specifically:

The gNB-DU initiates the establishment of the F1 interface and sends an F1setup request message to the gNB-CU. The message includes the system information of the gNB-DU. The system information of the gNB-DU can be MIB, SIB1, and the specific content of MIB and SIB1 can be similar to the existing LTE/ The MIB and SIB1 defined by NR are not repeated here for brevity.

The gNB-CU responds to the request of the gNB-DU and sends an F1setup response message to the gNB-DU. The message includes the SI configuration information determined by the gNB-CU. The SI configuration information can be configured before Step 1.1, or can be It is configured after that, and the present application is not limited to this.

Optionally, the gNB-CU determines the third configuration information, where the third configuration information is at least one of the SI window length of the other SIs, the SIB scheduling information in the other SIs, the mapping relationship between the SI and the SIB, and the scheduling period of the SI. kind.

Optionally, the above steps can also be replaced by a gNB-CU/gNB-DU configuration update message.

Optionally, the message sent by the gNB-CU to the gNB-DU may also carry an effective area (area ID). For the definition of the effective area, refer to the previous embodiment, which will not be repeated here.

The determination of the configuration information of the effective area and the system information and the interaction between the network nodes are described in detail in conjunction with FIGS. 6 to 9 above. Below, in conjunction with FIG. 10 and FIG. The flow of information blocks.

FIG. 10 shows a schematic flowchart of a transmission method 400 according to an embodiment of the present application. As shown in FIG. 10 , the first network node in the transmission method 400 may be the first network node in FIG. 1 , or may be For the DU in FIG. 2 , the second network node in the transmission method 400 may be the second network node in FIG. 1 or the CU in FIG. 2 , and the method 400 includes:

S410, the first network node determines that the terminal device uses a first message to request system information or a system information block, where the first message is a first random access message or a third random access message, and the first network node includes a radio link layer at least one of the functions of the control protocol layer, the medium access control layer and the physical layer;

S420, the first network node sends third indication information to the terminal device, and the terminal device receives the third indication information from the first network node, where the third indication information is used to instruct the terminal device to use the first indication The message requests system information or a system information block.

It should be understood that the terminal device may request system information or a system information block from the first network node according to the third indication information; or, the terminal device may request system information from the second network node according to the third indication information or System Information Block.

Specifically, the first network node first determines that the terminal device uses a first message to request SI or SIB, where the first message is a random access first message (MSG1) or a random access third message (MSG3). The network node sends third indication information to the terminal device, where the third indication information is used to instruct the terminal device to use the first message to request system information or a system information block, and the terminal device sends a message to the first network according to the third indication information Device requests SI or SIB.

Optionally, the first network node determines that the terminal device uses MSG1 to request SI from the first network node, and the third indication information is also used to indicate at least one system information or a mapping relationship between a system information block and a random access preamble sequence .

For example, the gNB-DU determines the mapping relationship between the system information requested by the terminal device and the preamble code, and then broadcasts the mapping relationship to the terminal device in the system information (eg SIB1). The terminal device sends Preamble1 to indicate an application for SI1, and preamble2 to indicate an application for SI2. Subsequently, when the DU receives the preamble of the UE, it broadcasts the SI corresponding to the preamble according to the correspondence between the preamble and the SI.

In the transmission method of the embodiment of the present application, the first network node determines that the terminal device uses MSG1 or MSG3 to request system information or system information blocks, which helps the terminal device to specify the request method when requesting system information or system information blocks.

Optionally, the first network node determines that the terminal device uses MSG1 to request the SI/SIB from the first network node, and the method 400 further includes:

The first network node sends system information request response information to the terminal device, and the terminal device receives the system information request response information sent by the first network node.

Optionally, the first network node determines that the terminal device uses MSG1 to request the SI/SIB from the second network node, and the method 400 further includes:

The first network node sends bitmap indication information to the terminal device, and the terminal device receives the bitmap indication information sent by the first network node, where the bitmap indication information is used to indicate system information or system information blocks sent to the terminal device.

It should be understood that when the terminal device requests system information or a system information block based on MSG1, if multiple terminal devices simultaneously request different SI/SIB, then after receiving the request, the first network node sends a system information request response, the said The system information request response includes at least one of response information (such as ack) and a bitmap indication, where the bitmap indication is used to indicate which SI/SIBs have been broadcast, specifically:

The system information request response may be included in the MAC header of the medium access control layer, and sent by the first network node to the terminal device through the medium access control layer control element MAC CE;

Alternatively, the system information request response may be included in the system message/system information, and is sent to the terminal device by the first network node through a system broadcast message.

It should be understood that when multiple terminal devices request SI/SIB through MSG3 or MSG1, and the SI or SIB requested by multiple terminal devices are different, then the first network node or the second network node can use bitmap to indicate which SI/SIB has been broadcast so that terminal devices can read the required system information as needed.

For example, UE1 requests SI2 from DU through MSG1, and UE2 requests SI3 from DU through MSG1. DU can send bitmap indication information to UE1 while broadcasting SI2 and SI3. The bitmap indication information is used to indicate that SI2 and SI3 have been broadcast, and UE1 can use SI2, when UE1 needs to use SI3, since the bitmap indication information has been received before, UE1 can directly use SI3.

Optionally, the first network node determines that the terminal device uses MSG3 to request SI/SIB from the second network node, and the method 400 further includes:

The second network node sends system information request response information to the first network node, and the first network node receives the system information request response information sent by the second network node and sends it to the terminal device; or, the second network node The first network node forwards the system information request response information to the terminal device, and the terminal device receives the system information request response information sent by the first network node. Optionally, the first network node determines that the terminal device uses MSG3 to request SI/SIB from the second network node, and the method 400 further includes:

The second network node sends bitmap indication information to the first network node, and the first network node receives the bitmap indication information sent by the second network node and sends it to the terminal device; or, the second network node passes through the first network node The node forwards the bitmap indication information to the terminal device, and the terminal device receives the bitmap indication information sent by the first network node, where the bitmap indication information is used to indicate system information or system information blocks sent to the terminal device.

It should be understood that when the terminal device requests system information or a system information block based on MSG3, if multiple terminal devices simultaneously request different SI/SIB, the second network node sends a system information request response after receiving the request, and The system information request response includes system information request response information (such as ack), and the response information is used to indicate that the system information requested by the terminal device has already responded and is about to be broadcast. Optionally, the system information request response also includes A bitmap indication information may be included, and the bitmap indication information is used to indicate which SI/SIBs have been broadcasted. Optionally, the system information request response may further include a conflict resolution identification information (CRID).

For example, when the CU receives the request message and recognizes that it is a system information request, the CU replies with the system information request response information, and also sends the system information transmission command information to the DU (for example, the system information transmission command information is sent from the CU through the system information command message) DU), the CU can also send a bitmap indication information, the system information request response information is used to indicate that the system information of the terminal equipment is about to be broadcast, and the system information transmission command message is sent to the DU to instruct the DU to broadcast the requested information. System information, bitmap indication information is used to indicate to the UE which system information or system information blocks have been broadcast.

It should be understood that the system information request response information can be sent through an RRC message: an RRC message is generated by the CU and sent to the terminal device, for example, the RRC message can be a fourth random access message (MSG4), that is, an RRC connection setup message. , the CU sends the RRC message through the DL RRC message transfer message between the CU and the DU to send the system information request response to the terminal device, and the DU forwards the RRC message to the UE;

Alternatively, the system information request response information can be sent through a MAC CE message: the DU generates the MAC CE message, then the CU can send the system information request response to the DU through the F1 interface message with the DU before that, for example, sent through the CU The system information command message is sent to the DU, or other new messages, which are not limited in this application, and the identification information (UE ID) of the terminal device should be added to the message to indicate which terminal device the system information request response is addressed to. , after the DU is received, the response is included in the MAC header and sent to the terminal device through the MAC CE.

It should also be understood that the Command message is a system information command message.

It should also be understood that the bitmap indication may be CU generation or DU generation.

If it is generated by the CU, the bitmap indication information generated by the CU can be sent to the terminal device through an RRC message, or the CU first sends the bitmap indication information to the DU through the F1 interface, and the DU sends it to the terminal device through the MAC CE. information sending process.

If it is generated by DU, after receiving the system information sent by the CU in the system information delivery message, the DU generates bitmap indication information, and then the DU adds the bitmap indication information to the MAC header and sends it to the terminal device through the MAC CE, The same as the response information sending process.

It should be noted that, if there is bitmap indication information, the system information request response information is optional.

It should also be understood that the conflict resolution identification information (CRID) can also be generated by a CU or a DU, and sent to the terminal device through an RRC message or a MAC CE, which is the same as the bitmap indication information sending process.

It should also be noted that, for the DU to determine whether the terminal device uses MSG1 or MSG3 or the CU to determine whether the terminal device uses MSG1 or MSG3, or to use other methods to determine whether to use MSG1 or MSG3 to request system information or a system information block, the terminal device is based on MSG1 or MSG3. When the MSG3 requests the system information or the system information block, the system information request response and the sending method of the bitmap indication can all adopt the above method. This application is not limited.

FIG. 11 shows a schematic flowchart of a transmission method 500 according to an embodiment of the present application. As shown in FIG. 11 , the first network node in the transmission method 500 may be the first network node in FIG. 1 , or may be For the DU in FIG. 2, the second network node in the transmission method 500 may be the second network node in FIG. 1, and may also be the CU in FIG. 2, and the method 500 includes:

S510, the second network node determines that the terminal device uses a first message to request system information or a system information block, where the first message is a first random access message or a third random access message, and the second network node includes a radio resource control protocol at least one of a layer, a service data adaptation layer and a packet data convergence protocol layer;

S520, the second network node sends third indication information to the first network node, and the first network node receives the third indication information from the second network node, where the third indication information is used to indicate the first network The node sends fourth indication information to the terminal device, where the fourth indication information is used to instruct the terminal device to use the first message to request system information or a system information block, and the first network node includes a radio link layer control protocol layer, a media at least one of access control layer and physical layer functions;

It should be understood that the terminal device requests system information or a system information block from the first network node according to the fourth indication information; or, the terminal device requests system information or system information from the second network node according to the fourth indication information information block.

Specifically, the second network node first determines that the terminal device uses MSG1 or MSG3 to request SI or SIB, and the second network node sends third indication information to the first network node, where the third indication information is used to indicate the The first network node sends fourth indication information to the terminal device, where the fourth indication information is used to instruct to use MSG1 or MSG3 to request system information or a system information block.

Optionally, the first message is a random access first message, and the third indication information is further used to indicate a mapping relationship between at least one system information and a random access preamble sequence.

For example, the CU determines whether the terminal device uses MSG1 or MSG3, and after the CU determines, sends the third indication information to the DU. The third indication information includes the mapping relationship between the system information and the preamble sequence or the mapping relationship between the system information block and the preamble sequence. After the DU receives The indication information is added to the system message (eg SIB1) and sent to the terminal device.

Optionally, the first message is a random access first message, and the fourth indication information is further used to indicate a mapping relationship between at least one system information and a random access preamble sequence.

For example, the CU determines whether the terminal device uses MSG1 or MSG3. After the CU determines whether it is MSG1 or MSG3, the CU sends third indication information to the DU. The third indication information indicates whether it is MSG1 or MSG3, such as 0, 1, etc. After the DU receives it, it identifies MSG1 or MSG3. If yes MSG1, then the DU constructs fourth indication information, the fourth indication information includes the mapping relationship between the system information and the preamble sequence or the mapping relationship between the system information block and the preamble sequence, and then the DU adds the fourth indication information in the system message and sends it to the terminal device.

Optionally, the first message is a third random access message, and the third indication information is also used by the first network node to indicate to the terminal device to use the random access third message to request system information, or the third The three indication information is used by the first network node to indicate to the terminal device to use the random access third message to request a system information block.

For example, the CU determines whether the terminal device uses MSG1 or MSG3. For those using MSG3, it can further indicate whether the request for system information using MSG3 is SI or SIB, and send the instruction to the DU, and the DU sends the instruction to the DU after receiving it. Terminal Equipment.

Optionally, the second network node determines that the terminal device uses MSG1 to request the SI/SIB from the first network node, and the method 500 further includes:

The first network node sends system information request response information to the terminal device, and the terminal device receives the system information request response information sent by the first network node.

Optionally, the second network node determines that the terminal device uses MSG1 to request the SI/SIB from the second network node, and the method 500 further includes:

The first network node sends bitmap indication information to the terminal device, and the terminal device receives the bitmap indication information sent by the first network node, where the bitmap indication information is used to indicate system information sent to the terminal device.

It should be understood that when the terminal device requests system information or a system information block based on MSG1, if multiple terminal devices simultaneously request different SI/SIB, after receiving the request, the first network node sends a system information request response, so The system information request response includes at least one of response information (such as ack) and bitmap indication, and the bitmap indication is used to indicate which SI/SIB has been broadcast, specifically:

The system information request response may be included in the MAC header of the medium access control layer, and sent by the first network node to the terminal device through the medium access control layer control element MAC CE;

Alternatively, the system information request response may be included in the system message/system information, and sent to the terminal device by the first network node through a system broadcast message;

Optionally, the second network node determines that the terminal device uses MSG3 to request SI/SIB from the second network node, and the method 500 further includes:

The second network node sends system information request response information to the first network node, and the first network node receives the system information request response information sent by the second network node and sends it to the terminal device; or, the second network node The first network node forwards the system information request response information to the terminal device, and the terminal device receives the system information request response information sent by the first network node.

Optionally, the second network node determines that the terminal device uses MSG3 to request SI/SIB from the second network node, and the method 500 further includes:

The second network node sends bitmap indication information to the first network node, and the first network node receives the bitmap indication information sent by the second network node and sends it to the terminal device; or, the second network node passes through the first network node The node forwards the bitmap indication information to the terminal device, and the terminal device receives the bitmap indication information sent by the first network node, where the bitmap indication information is used to indicate system information or system information blocks sent to the terminal device.

It should be understood that when the terminal device requests system information or a system information block based on MSG3, if multiple terminal devices simultaneously request different SI/SIB, the second network node sends a system information request response after receiving the request, and The request response includes system information request response information (such as ack), and the response is used to indicate that the system information requested by the terminal device has responded and is about to be broadcast. Optionally, the system information response request may also include a The bitmap indication is used to indicate which SI/SIBs have been broadcast. It should also be understood that the transmission mode of the system information request response, the conflict resolution identifier and the bitmap indication information contained in the system information response request is similar to that in the method 400, and for brevity, details are not repeated here.

The bitmap indication included in the system information response request can be included in the RRC message, then the second network node initiates an RRC message carrying the bitmap indication and forwards it to the terminal device through the first network node;

Alternatively, the system information response request may also be included in the MAC header of the media access control layer of the first network node. The network node sends it to the terminal device. At this time, the bitmap indication may be generated by the first network node and added to the MAC header, that is, the first network node generates the bitmap according to the requested system information sent by the second network node. Alternatively, it can also be generated by the second network node, and then the second network node can send the first network node the system information response request through the interface message, and the interface message may also need to indicate the specific The identification information (UE ID) of the terminal device. After receiving the first network node, the bitmap indication is added to the MAC header and sent to the terminal device through the MAC CE. Specifically, the bitmap indication may be in a form similar to 0100, and other possible forms are not limited in this application.

It should be noted that, the above-mentioned system information response request may also only include the bitmap indication, but not include the response information (ack).

It should also be noted that, for the CU to determine whether the terminal device uses MSG1 or MSG3 or the DU to determine whether the terminal device uses MSG1 or MSG3, or to use other methods to determine whether to use MSG1 or MSG3 to request system information or a system information block, the terminal device is based on MSG1 or MSG3. When the MSG3 requests the system information or the system information block, the system information request response and the sending method of the bitmap indication can all use the above method. This application is not limited.

10 and FIG. 11 , the method 400 and the method 500 according to the embodiments of the present application are described in detail. The method 400 and the method 500 respectively determine that the terminal device requests system information or The method of information block, the following describes the transmission method 600 according to the embodiment of the present application in detail with reference to FIG. 12 . The method 600 mainly introduces the process of mutual requesting of resource status between network devices.

FIG. 12 shows a schematic flowchart of a transmission method 600 according to an embodiment of the present application. As shown in FIG. 12 , the first network node in the transmission method 600 may be the first network node in FIG. 1 , or may be For the DU in FIG. 2, the second network node in the transmission method 600 may be the second network node in FIG. 1, and may also be the CU in FIG. 2, and the method 600 includes:

S610: The first network node sends first resource status information to a second network node, where the first resource status information includes at least one of physical resource blocks, hardware loads, and almost blank subframes, and the first network node includes a wireless link at least one of a road layer control protocol layer, a media access control layer and a physical layer function, the second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer;

S620, the second network node sends second resource status information to the third network node, where the second resource status information includes physical resource blocks, hardware loads, almost blank subframes, transport network layer loads, available capacity, and reference signal reception At least one of a power measurement report and a channel state information report.

Specifically, the first network node may actively report the first resource status information measured by the first network node to the second network node periodically, and the period may be configured by the second network node or may also be configured by the second network node. The first network node is preconfigured, and the first resource state information includes at least one of a physical resource block (Physical Resource Block, PRB), a hardware load (HW load), and an almost blank subframe (Almost Blank Subframe, ABS), the The second network node determines at least one of transmission network layer load, available capacity, reference signal received power measurement report, and channel state information report, and then the second network node reports the second resource state information to the third network node, The second resource status information includes physical resource blocks, hardware load, almost blank subframes, transmission network layer load (TNL load), available capacity (Composite Available Capacity), reference signal receiving power (Reference Signal Receiving Power, RSRP) measurement report, At least one of Channel Status Information (Channel Status Information, CSI) reports.

It should be understood that the first network node may be the gNB1-DU in FIG. 3 , the second network node may be the gNB1-CU in FIG. 3 , the third network node may be the gNB2 in FIG. 3 , or the The three network nodes are the CUs of gNB2 in FIG. 3 .

Optionally, before the first network node sends the first resource status information to the second network node, the method 600 further includes:

S601, the second network node receives a second resource state request message sent by the third network node, where the second resource request message is used to request the second resource state information;

S602, the second network node sends a first resource state request message to the first network node, where the first resource state request message is used to request the first resource state information.

Specifically, the third network node may request the second resource state information from the second network node, where the second resource state information includes physical resource blocks, hardware loads, almost blank subframes, transport network layer loads, and available capacity , at least one of a reference signal received power measurement report and a channel state information report, and the second network node requests the first resource state information from the first network node.

Optionally, the transmission method 600 further includes:

The third network node sends third resource status information to the second network node, and the second network node receives the third resource status information sent by the third network node, where the third resource status information includes physical resource blocks, hardware at least one of load, almost blank subframe, transmission network layer load, available capacity, reference signal received power measurement report, and channel state information report;

The second network node sends the fourth resource state information of the third network node to the first network node, the first network node receives the fourth resource state information of the third network node from the second network node, the The fourth resource state information includes at least one of physical resource blocks, hardware loads, and almost blank subframes.

Specifically, the third network node may request the second resource status information from the second network node, and may also send the third resource status information of the third network node to the second network node. The second network node After receiving the third resource state information of the third network node, send the fourth resource state information to the first network node. The first network node sends the fourth resource state information, and the first network node can load the load according to the fourth resource state information related work, such as coordination, etc.

In the transmission method of the embodiment of the present application, the first network node sends the resource status information to the second network node, which helps to solve the problem of mutual requests for resource status between network devices.

FIG. 13 shows a schematic flowchart of a transmission method 700 according to an embodiment of the present application. As shown in FIG. 13 , the first network node in the transmission method 700 may be the first network node in FIG. 1 , or may be For the DU in FIG. 2 , the second network node in the transmission method 700 may be the second network node in FIG. 1 or the CU in FIG. 2 , and the method 700 includes:

S710: The terminal device generates a second message, where the second message message includes fourth indication information, where the fourth indication information is used to instruct the terminal device to request system information, or the fourth indication information is used to instruct the terminal device to request establishment RRC connection;

Or, the second message generated by the terminal device, the second message is carried on the first logical channel or the second logical information, the first logical information is used to carry the message requesting system information, and the second logical channel is used to carry the RRC request connection message.

Alternatively, the terminal device generates a second message, where the second message uses a first logical channel identifier or a second logical channel identifier, the first logical channel identifier is used to identify a message requesting system information, and the second logical channel identifier A message used to identify a request for an RRC connection;

Specifically, the terminal device first generates an RRC message, where the RRC message includes fourth indication information, where the fourth indication information is used to instruct the terminal device to request system information, or the fourth indication information is used to instruct the terminal device to request system information Establish an RRC connection.

Alternatively, it is also possible to distinguish whether the message sent by the terminal device requests system information or requests an RRC connection through a logical channel.

Alternatively, the logical channel identifier can also be used to distinguish whether the message sent by the terminal device requests system information or requests an RRC connection.

It should be understood that the RRC message may also be called a Common Control Channel (Common Control Channel, CCCH) message, the CCCH is used to carry the RRC message, and the RRC messages that the CCCH can carry include but are not limited to: RRC reset (resume) message, RRC Re-establishment message, RRC connection establishment request message and system information request message. Among them, the RRC reset (resume) message, the RRC re-establishment message, and the RRC connection establishment request message can be classified as the first type of RRC message, and the first type of RRC message is used to request the establishment of an RRC connection; the system information request message can be classified as The second type of RRC message, the second type of RRC message is used to request system information, for example, the system information request message may be MSG3.

FIG. 14 shows a schematic diagram of the MAC protocol layer of an RRC message.

Optionally, the terminal device adds the fourth indication information in the MAC header. As shown in FIG. 14 , indication information (such as 0, 1) may be added in the R field or the F field, for example, 0 represents the first type of RRC message , 1 represents the second type of RRC message.

Optionally, the terminal device uses a new logical channel or logical channel identifier to send the system information request message, that is, the logical channel or logical channel identifier used by the system information request message is different from the logical channel or logical channel used by other RRC connection establishment messages. logical channel identifier

It should be understood that when a terminal device uses a new logical channel identifier to send a system information request message, the terminal device carries a new logical channel identifier (Logical Channel Identify, LCID) in the MAC header, and the LCID is when the terminal device initiates the RRC message. Added to the MAC header of the RRC message, the new LCID may be defined by a protocol or obtained by other means such as configuration by a base station, which is not limited in this application.

It should be understood that when a terminal device uses a new logical channel to send a system information request message, the RRC message can apply new CCCE configuration information, which has a new LCID, and the new LCID can be predefined by the protocol. The new CCCE configuration It can be transmitted in a new Signaling Radio Bearer (SRB) or on an existing SRB0.

Table 19 shows a new CCCH configuration as shown in Table 19.

Table 19 A CCCH configuration

Optionally, the terminal device adds the fourth indication information in the RLC header, where the fourth indication information is added to the RLC header of the RRC message when the terminal device initiates the RRC message.

Optionally, the fourth indication information is message type identification information of a message type of the second message, and the message type identification information is used to identify that the RRC message is a first-type RRC message or a second-type RRC message, specifically, The message type includes one of a first type of RRC message and a second type of RRC message.

It should be understood that the first type of RRC message includes but is not limited to the above three types. The first type of RRC message may also have other purposes. For example, the first type of RRC message may be used to request other requests except system information. , the embodiment of the present application aims to distinguish an RRC message requesting system information from other RRC messages.

S720, the terminal device sends the second message to the first network node, and the first network node receives the second message from the terminal device;

S730, the first network node sends a third message to the second network node, the second network node receives the third message sent by the first network node, the third message includes a first container, and the first container contains can indicate that the terminal equipment needs to request system information or system information blocks, or can indicate that the terminal equipment needs other purposes such as RRC connection establishment, the second network node includes a radio resource control protocol layer, a service data adaptation layer and a packet At least one of the data convergence protocol layers.

Specifically, the third message may be an initial UL RRC message transfer message, the first container is an RRC-container, and the RRC-container in the first container includes the message type and message content of the RRC message of the terminal device At least one of, after the second network node receives the third message, according to the purpose of the third message, that is, according to the content included in the first container included in the third message, it can be known that the purpose of the third message is Used to request system information or establish an RRC connection, such as RRC connection setup or RRC connection re-establish or RRC connection resume, etc. Specifically, the second network node can confirm the third message according to the message type included in the first container Or the purpose of the second message.

Optionally, if S721 is performed, that is, the first network node has identified the type of the second message, that is, the type of the RRC message, the first network node may also add an indication to indicate the second network node. The type of the second message ( The type of the second message includes requesting system information or establishing an RRC connection, such as at least one of system information request, system information block request, RRC connection setup, RRC connection re-establish, and RRC connection resume), so that After receiving the third message, the second network node directly identifies the purpose of the third message (the purpose includes requesting system information or establishing an RRC connection, such as system information request, system information block request, RRCconnection setup, RRC connection at least one of connection re-establish and RRC connection resume).

Optionally, before the first network node sends the third message to the second network node, the method 700 further includes:

S721, the first network node identifies the second message.

Specifically, after receiving the second message, the first network node identifies the second message, for example, can identify the MAC protocol layer of the second message, and if the R field is 1, determines the second message The message is used to request SI/SIB. If the R field is 0, it is determined that the RRC message is for other purposes; or, the LCID in the MAC protocol layer of the second message is identified, if the LCID is the LCID defined by the protocol for requesting system information (For example, the LCID is 10100/110111), then determine that the second message is used to request SI/SIB, otherwise, determine that the second message is for other purposes; or, identify whether the second message is transmitted from a new logical channel or other If it is transmitted from the logical channel, if it is transmitted from a new logical channel (the new logical channel can be defined by a protocol, for example, the LCID is 4, which corresponds to SRB4), it is determined that the second message is used to request SI/SIB, otherwise, it is determined that the second message is used to request SI/SIB. The second message is for other purposes.

It should be understood that the second message may be an RRC message, the third message may be a UL RRC messagetransfer message, and the RRC message may be encapsulated in the UL RRC message transfer message as a Container and sent to the second network node.

Optionally, if the first network node has a partial RRC function, then the first network node can determine whether the RRC message is used to request SI/SIB or other information by identifying the message type in the RRC message sent by the terminal device. use.

For example, the first network node is a DU, and the second network node is a CU. After recognizing that the RRC message is for requesting SI/SIB, the DU directly sends the initial UL RRC message to the CU. The initial UL RRC message The DU to CU RRC Container may not be included in the DU to CU RRC Container (the DU to CU RRC Container is used for the CU to trigger the establishment of SRB1).

For another example, after the DU recognizes that the RRC message is for requesting SI/SIB, it performs admission control of the RRC message, that is, the DU has the admission control function for requesting system information, if the DU does not allow the access of the RRC message , then one way is that the DU directly sends the rejection indication information to the terminal equipment, and the rejection indication information is included in the MAC CE; the other way is that the DU does not allow the access of the RRC message, and the DU sends the rejection indication information to the CU, Then the CU informs the terminal device through an RRC message.

Optionally, before the first network node sends the third message to the second network node, the method 700 further includes:

S722, the first network node performs admission control on the RRC message.

Specifically, the RRC message includes a first-type RRC message and a second-type RRC message, and the admission control policy is the same for the first-type and second-type RRC messages.

It should be understood that the first network node may perform S722 after S721, may only perform S721, may only perform S722, or may not perform both S721 and S722.

It should be noted that if neither S721 nor S722 is performed, the second message generated by the terminal device in S710 may not include the fourth indication information, or the terminal device may use the same logical channel to carry the second message, or , the terminal device can use the same logical channel identifier to identify the second message.

For example, the DU may not identify the RRC message, but perform admission control on all RRC messages. If the DU does not allow admission, it directly sends an initial UL RRC message to the CU, where the initial UL RRC message includes the RRC container , but does not include the DU to CU RRC Container. After receiving the message, the CU identifies the message type of the RRC message through the content (for example, message type) in the RRC container included in the initial UL RRC message message, and determines Whether it is a system information or system information block request, if it is not an RRC message of system information or system information block request, the CU determines that the RRC message does not include the DU to CU RRC Container, and the CU sends the rejection indication information to the terminal device through the DU . Otherwise, if the CU identifies that the RRC message is a system message request through the content in the RRC container (for example, message type), a system message request response is performed.

For another example, the DU can identify the RRC message. When the DU identifies that the RRC message is a system information request, it allows admission, and sends a newly defined message (for example, SI request message transfer) to transfer the RRC message. The newly defined message includes CGI and RRC Container (the message type is included in the RRC Container). After the CU receives it, it can recognize that the newly defined message is used to request SI. Further, the CU also needs to pass the system included in the RRCContainer. The content of the information request identifies which SI/SIB is requested by the terminal device.

S740, the second network node determines that the third message includes a first container, and the information of the first container indicates that the terminal device needs to request system information or a system information block;

S750, the second network node sends at least one of system information request response information, bitmap indication information and conflict resolution identifier to the first network node, and the first network node receives the system information request response information sent by the second network node , at least one of the bitmap indication information and the conflict resolution identifier and send the information to the terminal device, or the second network node forwards the system information request response information, the bitmap indicator information and the conflict resolution identifier to the terminal device through the first network node At least one of the bitmap indication information is used to indicate the system information or system information block sent to the terminal device.

Optionally, the second network node determines that the third message includes a first container, and the message type in the first container indicates that the terminal device is requesting an RRC connection, not requesting system information or a system information block, then the second network The node also determines that the third message does not include the second container, and the second container is the RRC container from the first network node to the second network node (that is, the RRC information from the first network node to the second network node), then The second network node sends rejection indication information to the terminal device through the first network node, wherein the rejection indication information includes a message type of the rejection indication.

Specifically, the third message is an initial UL RRC message transfer, the first container is an RRC-container, and the second container is a DU to CU RRC container or a DU to CU RRCinformation information element.

Wherein, the purpose of the third message is used for transport layer 3 messages (such as DL CCCH message, or RRC message, or system information request), it can be understood that the purpose of the third message is to establish an RRC connection or system Information request, wherein establishing an RRC connection includes at least the RRC connection establishment message (RRCconnectionreestablishment), the RRC connection establishment rejection message (RRCconnectionreestablishmentreject), the RRC connection establishment message (RRCconnectionsetup), the RRC connection rejection message (RRCconnectionreject), and the RRC reset message (RRCresume). One; the system information request includes at least one of a system information request (system information request) and a system information block request (system information block request).

The first container includes at least one of a CCCH message and an RRC message of the terminal device, wherein both the CCCH message and the RRC message of the terminal device may include at least one of a message type and a message content, wherein the message type includes RRC connection establishment message (RRCconnectionreestablishment), RRC connection establishment reject message (RRCconnectionreestablishmentreject), RRC connection establishment message (RRCconnectionsetup), RRC connection reject message (RRCconnectionreject), RRC reset message (RRC resume), system information request (systeminformation request) and system information block At least one of the request (system information block request), the message content and message type are specifically similar to the CCCH message or RRC message in the existing LTE or NR technology, which is not limited in this application; it can be understood that the purpose of the third message is It may be determined according to the information of the first container in the third message, or may be determined by other information elements in the third message, which is not limited in this application.

The second container includes configuration information of SRB1 (signaling radio bearer, signaling bearer).

The second network node determines whether to reject the request of the terminal device according to the purpose of the third message. Specifically, the purpose of the message identified by the second network node according to the content of the first container included in the third message is to request RRC connection (eg, RRC connection setup or RRC connection re-establish or RRCconnection resume), then if the second container is not included in the third message, the second network node rejects the assumption that the first network node cannot serve the terminal device The terminal device, optionally, the second network node sends rejection indication information to the terminal device through the first network node, where the rejection indication information may include a message type of the rejection indication.

For example, the CU receives the third message sent by the DU, and the CU identifies through the third message that the third message is a system information request message. Type message type) identifies that the RRC message is a system information request message, and performs a system message request response.

For another example, the CU receives the third message sent by the DU, and the CU identifies the system information request message when the third message is the third message. Specifically, the CU uses the content in the RRC container (eg, RRC The message type (message type) identifies that the RRC message is the first type of RRC message, that is, the RRC message of RRC connection setup or re-establish or resume, that is, it can be understood that the message type corresponding to the RRC message is RRC connection setup or re-establish or the message type of resume (for example, it is recognized that the RRC message is not used for a system information request), and the CU recognizes that the third message does not include the DU to CU RRC Container (or DU to CURRC information), then the DU cannot serve the Under the assumption of the terminal equipment, the terminal equipment is rejected, that is, the CU rejects the RRC message of the terminal equipment. For example, the CU sends the rejection indication information to the terminal equipment through the DU. Specifically, the CU can pass the DL RRC message transfer message to the rejection. The indication information is sent to the DU, and the DU is sent to the terminal device.

The CU identifies that the RRC message is for a system information request through the content in the RRC container (for example, message type), or the CU identifies that the RRC message is for a system information request through the SI request message transfer message sent by the DU , the CU shall send a system information request response to the terminal device through the DU. Specifically, the CU puts the system information request response information (ack) in the RRC connection setup message, and the RRC connection setup message can be encapsulated in a DL RRC message transfer message and sent by the CU to the DU, and then the DU sends the RRC The connection setup message is sent to the end device.

Optionally, if the CU needs to perform conflict resolution (that is, the CU has access to the RRC connection establishment of the terminal device), it also needs to send a conflict resolution identifier (CRID) to the terminal device. Specifically, the conflict resolution identifier can be carried in the The RRCconnection setup message, or may also be sent in a new message, and the specific sending method is the same as the sending method of the system information request response, which will not be repeated here.

Optionally, the CU can also first send the system information request response or CRID to the DU through the F1 interface message of the DU and the CU (such as a system information delivery command message, or other existing interface messages or new messages, which are not limited in this application), Then, the DU adds the conflict resolution identifier to the MAC header and sends it to the terminal device through the MAC CE.

Or, for the RRC message requested by the system message, the CU may not send the above-mentioned response information and CRID, and the CU sends a bitmap through the DU (for example, if there are 4 SIs in other SIs and 22 SIBs, then the system information request is SI , the bitmap indication can be 0110, 0 means no broadcast, 1 means system information has been broadcast, the position of 0110 corresponds to the number of SI, if the system information request is SIB, the bitmap indication can be a string of 22 bits The 01 indicates, 0 means no broadcast, 1 means system information has been broadcast, the position of the 22 bits corresponds to the number of the SIB) to the terminal device, the bitmap is used to indicate which system information or system information blocks are requested. , the bitmap indication can be sent through the RRC message of the CU, or the CU can also first send the bitmap indication to the DU through an F1 interface message (such as a system information delivery command message) between the CU and the DU, and the message needs to carry the terminal The identification of the device, and then the DU adds the bitmap indication in the MAC header and sends it to the terminal device through the MAC CE, which is the same as the sending method of the system information request response information and the conflict resolution identification, and will not be repeated here.

In the transmission method of the embodiment of the present application, the second network node identifies the RRC container in the third message, thereby determining whether the terminal device requests system information, avoiding the second network node directly rejecting the terminal device requesting system information.

It should be understood that in this embodiment of the present application, the messages between the DU and the CU, such as the initial UL RRC messagetrasfer, DL RRC message transfer, and UL RRC message transfer, are all used to transfer the RRC message of the terminal device. The RRC container will include the message type, which is used to describe what the RRC message of the terminal device is, such as the RRC connection setup message, the SI request message, and so on.

FIG. 15 shows a schematic flowchart of a transmission method 800 according to an embodiment of the present application. As shown in FIG. 15 , the transmission method 800 includes:

S801, the terminal device is connected to the first network node and the third network node and can transmit/receive data from the first network node and the third network node.

Optionally, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function.

Optionally, the third network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function;

It should be understood that the first network node may be DU1, the third network node may be DU2, and the UE connects to DU1 and DU2 and sends/receives data in the following two scenarios:

Scenario 1: The UE has connections with DU1 and DU2, but the bearers established by DU1 and DU2 and the UE are different bearers. In this scenario, after a radio link problem occurs in DU1, if the data is to be transferred to DU2 for transmission, the CU needs to establish a relevant bearer with the UE through DU2.

Scenario 2: The UE is connected to DU1 and DU2, and DU2 belongs to the backup link of DU1 and establishes the same bearer as the UE. Alternatively, the bearers established by DU2 and DU1 with the UE are partially the same, and partially different, which is not limited in this application.

It should also be understood that if the UE is not connected to DU1 and DU2 at the same time, when the CU-CP decides to replace the DU for data transmission, it also needs to establish bearer information with the new DU. Specifically, for example, through UE context setup/modification relevant process.

S802, the first network node finds that there is a problem with its own wireless link.

Specifically, the determination of the radio link problem of the DU1 is achieved through the DU, which is not limited in this application.

S803, the first network node sends a first notification message to the user plane node, and the user plane node receives the first notification message sent by the first network node.

Specifically, DU1 sends a first notification message (a radio link problem notification message, that is, a radio link outage notification message) to CU-UP through the F1-U interface, and the CU-UP receives the first notification message sent by DU1 through the F1-U interface. notification message.

It should be understood that the first notification message may be transmitted through a DDDS PDU, that is, as a part of a data radio bearer DDDS (DL DATA DELIVERY STATUS) PDU, or may also be a part of other existing PDUs, or be newly defined The PDU, or a part of the newly defined PDU, is not limited in this application. The notification message may also include the SN number of the lost data packet, such as Number of lost F1-U Sequence Number rangesreported, which corresponds to the PDCP PDUs that DU1 has not yet transmitted.

It should be noted that since the radio link outage notification message here is sent through the F1-U interface, the message is sent to the CU-UP, because the CU-UP and the DU have user plane interfaces.

It should be understood that the message of the F1-U interface is a DDDS (DL DATA DELIVERY STATUS) PDU. Specifically, the message includes an uplink/downlink radio link outage notification, or other existing messages of the F1-U interface, or It is new news, and this application does not make any limitation on it. It should be noted that the uplink/downlink radio link outage notification may be a cause value or other indication, which is not limited in this application.

S804, the user plane node sends the first notification message to the control plane node, and the control plane node receives the first notification message sent by the user plane node.

It should be understood that the user plane node may be a CU-UP, and the control plane node may be a CU-CP.

Specifically, the CU-UP may send the first notification message through an E1AP interface message.

It should be understood that after the CU-UP receives the DDDS PDU, it reads the first notification message. If it reads the cause value and learns that there is a problem with the radio link of the DU, then the CU-UP sends the first notification message to the It is carried in the E1AP interface message and sent to the CU-CP.

It should also be understood that, specifically, the E1AP message may be a UE bearer setup/modificationrequest/response message or a UE bearer modification required/confirm message, etc., or may also be other existing E1AP messages, or a new message. Without any limitation.

S805, after receiving the first notification message, the control plane node determines whether to replace the first network node.

Specifically, after receiving the first notification message, the CU-CP determines whether to replace the DU, that is, whether to change the DU1 to DU2 to transmit data, or whether to retransmit the data that was not successfully transmitted by DU1 through DU2, etc. The application is here Not limited.

It should be understood that the link between the CU-CP and the UE transmission through DU1 may not be cancelled (the link may be restored later, through the resume process), or the link between the CU-CP and the UE transmission through DU1 may also be cancelled (Subsequent restoration of this link requires rebuilding the link).

It should also be understood that if the DU2 that the CU-CP decides to replace has not allocated relevant resources to the UE (that is, the scenario 1 described above), then the CU-CP also needs to initiate a bearer establishment related process to DU2, specifically:

The CU-CP sends the F1AP message UE context setup/modification request to the DU2, and requests the DU2 to establish the relevant bearer for data transmission. After receiving the message, the DU2 responds to the F1AP UE context setup/modification response to the CU-CP.

S806, after the control plane node makes a decision, send a first response message to the user plane node, and the user plane node combines the first response message sent by the control plane node.

For example, after the CU-CP makes a decision, it sends a first response message to the CU-UP, and the CU-UP receives the first response message sent by the CU-CP, that is, the CU-CP informs the CU-UP of the decision result (such as updating the identifiers of DU and DU). Wait).

Specifically, the first response message can be sent through an E1AP interface message, and the E1AP message can be a UEbearer setup/modification/release request/response message or a UE bearermodification required/confirm message, or can also be other existing E1AP messages , or new news, which is not limited in this application.

It should be understood that the first response message includes an identifier of the update DU, and the identifier of the DU may be an identifier that identifies the cellID, or other identifiers that can identify the DU, which is not limited in this application.

Optionally, after receiving the first response message, the CU-UP stops DU1 from transmitting data. Alternatively, the CU-UP stops the DU1 from transmitting data at S803, which is not limited in this application.

It should be noted that this step is optional. If this step is not present, the user plane node can decide to change the DU for data transmission by default, that is, after the user plane node sends the first notification message to the control plane node, it directly decides to change the DU. Data transmission is performed, or the user plane node sends the first notification message to the control panel node and also sends the DU information of the decision change to the control panel node, thereby informing the control panel node that the DU for data transmission has been replaced.

S807: The control plane node sends fifth indication information to the third network node, where the fifth indication information is used to instruct the terminal device to replace the network node.

After the CU-CP determines to replace the DU for uplink/downlink data transmission, it sends a fifth indication message to DU2, where the fifth indication message is used to inform the UE of the result of replacing the DU; specifically, the fifth indication information can be transmitted through the F1 interface message .

It should be noted that this step is optional, and there is no order restriction between this step and other steps.

S808, the third network node sends the fifth indication information to the terminal device, and the terminal device receives the fifth indication information sent by the third network node.

Specifically, the CU-CP sends the result of replacing the DU to the UE (eg, informs the UE through DU2) through an F1AP message (eg, a DL RRC message transfer message), and the result, eg, uplink data is transmitted from DU2.

It should be understood that this step and other steps are not limited in order, and may be performed before or after any step.

It should also be understood that if the indication of radio link outage is an indication of a problem with uplink transmission, then the CU-CP may decide that the source DU1 continues to transmit downlink data, and DU2 transmits uplink data. At this time, the CU-CP needs to This decision informs the UE, that is, the DU that instructs the UE to perform uplink transmission, so that the UE knows the direction of the uplink and downlink data.

It should also be understood that if the indication of radio link outage is an indication of a problem with downlink transmission, then the CU-CP may decide to transmit all uplink and downlink data from DU2. At this time, the CU-CP needs to inform the UE of this decision, that is, A DU that instructs the UE to perform uplink or downlink transmission, so that the UE knows the direction of the uplink and downlink data.

In general, the fifth indication message is sent to the UE through an RRC message through the CU-CP, and specifically, the indication may be the identifier of the DU for uplink transmission, the identifier of the cell for uplink transmission, the cell group for uplink transmission ( At least one of the identifier of the cellgroup) and the identifier of the SCG for uplink transmission, which is not limited in this application.

It should be noted that this step is optional, and there is no order restriction between this step and other steps.

S809, the user plane node sends data to the third network node, and the third network node receives the data sent by the user plane node.

For example, the CU-UP starts to send new PDU data or retransmitted PDU data to DU2, and sends it to the UE through DU2.

S810, when the radio link of the first network node is restored, the first network node sends a second notification message to the user plane node.

For example, if the DU1 finds that the radio link resumes, it sends a second notification message (eg, a radio link resume radio link resume notification message) to the CU-UP, and the CU-UP receives the second notification message sent by the DU1.

Specifically, the second notification message is sent through the F1-U user plane interface, and is similar to the notification of radio linkoutage. The message of the F1-U interface is a DDDS (DL DATA DELIVERY STATUS) PDU, that is, a part of a data radio bearer DDDS (DL DATA DELIVERY STATUS) PDU, or a part of other existing PDUs, or a newly defined PDU , or a part of a newly defined PDU, which is not limited in this application. Specifically, the message includes the cause value of the uplink/downlink radio link resume, or may also be other existing messages of the F1-U interface, or a new message, which is not limited in this application.

S811, the user plane node sends the second notification message to the control plane node, and the control plane node receives the second notification message sent by the user plane node.

For example, after receiving the second notification message, the CU-UP forwards the second notification message to the CU-CP through the E1 interface, so that the CP decides whether to resume the DU for data transmission.

It should be understood that, after the CU-UP receives the DDDS PDU, it reads the cause value and learns that the radio link of the DU is restored, then the CU-UP carries the information in the E1AP interface message and sends it to the CU-CP.

It should also be understood that the E1AP message may be a UE bearer setup/modification/releaserequest/response message or a UE bearer modification required/confirm message, etc., or may also be other existing E1AP messages, or a new message, which is not made in this application. any restrictions.

Optionally, after receiving the response, the CU-UP stops the DU2 from transmitting data, or the CU-UP stops the DU2 from transmitting data at S810, which is not limited in this application.

S812, the control plane node sends a second response message to the user plane node, and the user plane node receives the second response message sent by the control plane node.

For example, after the CU-CP makes a decision, it sends a second response message to the CU-UP, and the CU-UP receives the second response message sent by the CU-CP, that is, informs the UP of the decision result (such as restoring the DU, the DU identifier, etc.), the The second response message may be sent through an E1AP interface message.

Specifically, the E1AP message may be a UE bearer setup/modification/releaserequest/response message or a UE bearer modification required/confirm message, etc., or may also be other existing E1AP messages, or a new message, which is not made in this application. any restrictions.

It should be understood that the second response message includes the identifier of the restored DU, and the identifier of the DU may be an identifier that identifies the cellID, or other identifiers that can identify the DU, which is not limited in this application. Alternatively, it can also be a recovery instruction directly, that is, the UP stores the source DU in advance, and once the recovery instruction is received, it can know which DU to recover data for transmission.

It should be noted that this step is optional. If this step is not present, the user plane node can decide by itself to restore the DU for data transmission by default, that is, after the user plane node sends the first notification message to the control plane node, it directly decides to restore the DU. Data transmission is performed, or the user plane node sends the first notification message to the control panel node and also sends the decision-recovered DU information to the control panel node, thereby informing the control panel node that the DU for data transmission has been restored.

S813, the user plane node sends data to the first network node, and the first network node receives the data sent by the user plane node.

For example, after the CU-UP resumes data transmission of DUs, it sends new PDUs or retransmitted PDUs and transmits them to the UE through DU1.

Specifically, the CU-UP can decide to resume the uplink and downlink data transmission of DU1.

Optionally, the control panel node may further notify the UE that the data transmission node is restored to the first network node through the third network node or the first network node.

In the current prior art, for the CU-DU architecture, the determination of the radio link problem of the DU belongs to the realization of the DU, and the DU sends the indication to the CU through the interface between the DU and the CU after confirming the radio link failure/recovery. Yes, the DU can send the radio link problem through the user plane or control plane protocol, and the CU decides whether to replace the DU after receiving it. If the DU is replaced, the CU performs data transmission with the UE through the new DU. However, the prior art only solves the problem of indicating the radio link problem under the CU-DU architecture, and the prior art cannot solve the indicating of the radio link problem under the CP-UP architecture. Under the UP architecture, the CP obtains the method of radio link failure/recovery.

The wireless communication method according to the embodiment of the present application helps to solve the problem of indicating the fault/recovery of the wireless link under the CP-UP architecture.

The transmission method 800 according to the embodiment of the present application is described above with reference to FIG. 15 . In FIG. 15 , the wireless link failure indication is transmitted through the F1-U user plane interface. The following describes the transmission method 900 according to the embodiment of the present application in detail with reference to FIG. 16 . , in the method 900, the radio link failure indication can be transmitted through the F1-C control plane interface. If the radio link problem indication is a process of transmitting through the F1-C control plane interface, the DU can be transmitted through the F1AP message (for example, UE context setup/ modification/release request/response/required/confirm message, etc.) to send the indication to the CU-CP, as shown in FIG. 16 , the method 900 includes:

S901, the terminal device is connected to the first network node and the third network node and can transmit/receive data from the first network node and the third network node.

For example, the UE is connected to DU1 and DU2 and can transmit/receive data from DU1 and DU2.

S902, the first network node finds that there is a problem with its own wireless link.

For example, DU1 finds a problem with its wireless link.

It should be understood that the process of S901-S902 is similar to that of S801-S802, and for the sake of brevity, details are not repeated here.

S903, the first network node sends a first notification message to the control plane node, and the control plane node receives the first notification message sent by the first network node.

For example, DU1 sends a first notification message (radio link outage notification message) to CU-CP through F1-C interface, and CU-CP receives the first notification message from DU1 through F1-C interface.

Specifically, F1AP messages, such as UE context setup/modification request/response/required messages, etc., or other existing F1AP messages, or new messages may be used, which is not limited in this application.

It should be noted that if the DU2 that the CU-CP decides to replace has not allocated relevant resources to the UE (that is, the scenario 1 described above), then the CU-CP also needs to initiate a bearer establishment related process to DU2, specifically:

The CU-CP sends the F1AP message UE context setup/modification request to DU2, and requests the DU2 to establish the relevant bearer to be digitally transmitted. After receiving the message, DU2 responds to the F1AP UE context setup/modification response to the CU-CP.

S904, the control plane node sends data to the third network node, and the third network node receives the data sent by the control plane node.

For example, the CU-CP starts to send new PDU data or retransmitted PDU data to DU2, and sends it to the UE through DU2.

S905, when the radio link of the first network node is restored, the first network node sends a second notification message to the control plane node.

For example, if the DU1 finds that the radio link is restored, it sends a second notification message (radio linkresume notification message) to the CU-CP, and the CU-CP receives the second notification message sent by the DU1.

S906, the control plane node sends data to the first network node, and the first network node receives the data sent by the control plane node.

For example, after the CU-CP decides to restore the data transmission DU, a new PDU or a retransmitted PDU is transmitted through DU1.

Optionally, the CU-CP decides to restore the uplink and downlink data transmission of DU1.

The transmission method 1000 according to the embodiment of the present application is described below with reference to FIG. 17 . The transmission method 1000 is mainly aimed at a scenario in which the UP changes due to the movement of the UE under the framework of the CP-UP, that is, the scenario in which the UE switches from the source UP to the target UP, At this time, the source UP may buffer some data from the core network. Therefore, at this time, the buffered data needs to be sent from the source UP to the target UP during the handover process, that is, the user plane channel needs to be established between the UPs. data forwarding. The embodiments of the present application are mainly aimed at the following scenarios:

Scenario 1: CP does not change during UP change

The CP decides to switch UP, and decides to forward data (for example, ask the source UP in advance whether there is cached data, or the source UP periodically reports the status of the buffered data), and sends an indication to the target UP (displayed indication of the need for data forwarding, or hidden type handover status indication), instruct the target UP to allocate a data forwarding address (the data forwarding address can be PDU session granularity and/or DRB granularity, and can be an uplink/downlink data forwarding address, which is not limited in this application);

The target UP sends the allocated data forwarding address to the source UP through the CP;

The source UP forwards the buffered data according to the data forwarding address.

Scenario 2: CP changes during UP change

The source CP decides to switch UP, and decides to forward data (for example, ask the source UP in advance whether there is buffered data, or the source UP periodically reports the status of buffered data), and sends an instruction to the target UP through the target CP (the displayed data needs to be forwarded) indication, or an implicit handover status indication), instructing the target UP to allocate a data forwarding address (the data forwarding address may be of PDU session granularity and/or DRB granularity, and may be an uplink/downlink data forwarding address, which is not limited in the present invention);

The target UP sends the allocated data forwarding address to the source UP through the target CP and the source CP.

The source UP forwards the buffered data according to the data forwarding address.

FIG. 17 shows a schematic flowchart of a transmission method 1000 according to an embodiment of the present application. As shown in FIG. 17 , the method 1000 includes:

S1001, the control plane node triggers the change of the user plane node.

For example, the CP triggers a change to UP. Specifically, how the control plane node triggers the change of the user plane node belongs to implementation, which is not limited in this application.

S1002, the control plane node sends a handover request message to the source user plane node, and the source user plane node receives the handover request message sent by the control plane node.

For example, the CP sends a handover request message to the source UP, and the source UP receives the handover request message sent by the CP.

S1003, the source user plane node sends a handover request response message to the control plane node, and the control plane node receives the handover request response message sent by the source user plane node.

For example, the source UP sends a handover request response message to the CP, and the CP receives the handover request response message sent by the source UP.

Specifically, the CP first sends a handover request message to the source UP. The handover request message carries a data status request (such as a cached data status). After receiving the source UP, the source UP responds to the CP. If the UP has a cache, it can decide to forward the data. , then carry the data forwarding instruction to the CP.

It should be understood that S1002-S1003 are optional, and the handover request initiated by the CP to the UP can be the use of an existing E1AP message, and the message name is not limited, such as bearer modification/setup/release request/response/required/confirm message, or other This application does not make any limitation on the existing E1AP message or the new message.

It should be noted that the two steps of S1002 and S1003 can be replaced by one step, that is, the source user plane node directly sends status information to the control plane node, and the status information is such as data cache information, and the control plane node considers that it can be triggered after receiving it. data forwarding. The state information may be triggered periodically or by an event, which is not limited in this application.

S1004, the control plane node sends sixth indication information to the target user plane node, and the target user plane node receives the sixth indication information sent by the control plane node.

For example, the CP sends sixth indication information to the target UP, and the target UP receives the sixth indication information sent by the CP, where the sixth indication information is used to instruct the source UP to perform data forwarding, that is, instruct the target UP to allocate a data forwarding to the source UP address.

It should be understood that the sixth indication information may be carried in an existing E1AP message, such as a bearer modification/setup/release request/response/required/confirm message, or other existing E1 AP messages, or a new message. There are no restrictions on this application.

It should also be understood that the sixth indication information may be a displayed data forwarding indication (eg, data forwarding indication, which may be uplink or downlink), or may also be an implicit indication (eg, HO status, HO, etc., that is, telling the target UP The message is triggered by the UP handover, not triggered by the initial access of the UE), or, it can also be implicitly indicated by information carrying a specific PDU session or DRB, or it can also be a data forwarding indication carrying a specific PDU session or DRB. (For example, data forwarding indication of DRB ID1, data forwarding indication of PDU session 1, that is, the target UP only allocates a data forwarding address for the DRB or the PDU session, and the source UP only forwards the data of the DRB or the PDU session ).

S1005, the target user plane node allocates a data forwarding address, and sends the data forwarding address to the control plane node.

For example, the target UP allocates a data forwarding address and sends the data forwarding address to the CP.

Specifically, the data forwarding address may be PDU session granularity and/or DRB granularity, and may be an uplink/downlink data forwarding address, for example, DL/UL Forwarding GTP Tunnel Endpoint, PDU Sessionlevel DL data forwarding GTP-U Tunnel Endpoint, this application does not make any limitation on this.

S1006, the control plane node forwards the data forwarding address to the source user plane node.

For example, after receiving the data forwarding address, the CP sends it to the source UP.

It should be understood that the data forwarding address can be carried in existing E1AP messages, such as bearermodification/setup/release request/response/required/confirm messages, other existing E1AP messages, or new messages. This application There is no restriction on this.

It should be understood that the method 1000 also includes the modification of the bearer between the CU and the DU through the F1AP message; the SN (sequence number sequence number) transfer process is performed between the CP and the target UP, between the CP and the source UP; data forwarding is performed between the source UP and the source UP. Executed between target UPs; the CP and the core network perform a path update process, these processes are similar to the existing processes, and are not repeated here for brevity.

Optionally, for scenario 2, that is, when the CP is changed, after receiving the data forwarding address sent by the target UP, the target CP can send the data forwarding address to the source CP, and the source CP sends the data forwarding address to the source CP. The source is UP. Specifically, the target CP sends the data forwarding address through an interface between the target CP and the source CP, such as an Xn interface, an X2 interface or other existing or new interfaces, which is not limited in this application. It should be noted that the target CP instructs the target UP to allocate a data forwarding address, wherein the data forwarding instruction of the target CP may be triggered by itself or by the source CP, that is, after the source CP triggers data forwarding, the source The CP sends the data forwarding indication to the target CP (for example, through the Xn interface or the X2 interface), and the target CP instructs the target UP to allocate a data forwarding address, wherein the method for the target UP to allocate the data forwarding address is similar to that in scenario 1, and here No longer. The data forwarding address is similar to that of the first scenario, and details are not repeated here.

The transmission method according to the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 17 , and the network device and the terminal device according to the embodiment of the present application are described in detail below with reference to FIG. 18 to FIG. 29 .

FIG. 18 shows a schematic block diagram of a network device 1100 according to an embodiment of the present application. As shown in FIG. 18 , the network device 1100 includes:

The processing module 1110 is configured to control the transceiver module 1120 to receive the first indication information from the second network node, where the first indication information is used to indicate the valid area of each system information in the at least one system information;

The transceiver module 1120 is further configured to send the at least one system information and the first indication information to the terminal device, so that the terminal device can know the valid area to which the at least one system information is applied.

Optionally, the transceiver module is further configured to receive first configuration information from the second network node, where the first configuration information includes at least one system information block, scheduling information of the at least one system information block, and the at least one system information block. At least one of the mapping relationship between the information and the at least one system information block, and the scheduling period of each system information in the at least one system information.

Optionally, the processing module 1110 is further configured to determine second configuration information, the second configuration information is used by the first network node to send the at least one system information, and the second configuration information includes each of the at least one system information. At least one of the window length of the system information, the scheduling information of the at least one system information block, the mapping relationship between the at least one system information and the at least one system information block, and the scheduling period of each system information in the at least one system information .

Optionally, the scheduling information of the at least one system information block includes a scheduling period of each system information block in the at least one system information block, a warning area list of each system information block in the at least one system information block, and the at least one system information block. At least one of the broadcast times for each system information block in the message.

Optionally, the transceiver module is further configured to receive closed subscriber group CSG indication information and CSG identification information from the second network node, where the CSG indication information is used to indicate that the cell where the terminal device is located is a CSG cell, or the The CSG indication information is used to indicate that the cell where the terminal device is located is not a CSG cell.

Optionally, the network device includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or

The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

FIG. 19 shows a schematic block diagram of a network device 1200 according to an embodiment of the present application. As shown in FIG. 19 , the network device 1200 includes:

a processing module 1210, configured to determine the valid area of each system information in the at least one system information;

The transceiver module 1220 is configured to send first indication information to the first network node, where the first indication information is used to indicate an effective area of each system information in the at least one system information.

Optionally, the transceiver module 1220 is further configured to send first configuration information to the first network node, where the first configuration information includes at least one system information block, scheduling information of the at least one system information block, and the at least one system information block At least one of the mapping relationship with at least one system information block, and the scheduling period of each system information in the at least one system information.

Optionally, the scheduling information of the at least one system information block includes a scheduling period of each system information block in the at least one system information block, a warning area list of each system information block in the at least one system information block, and the at least one system information block. At least one of the broadcast times for each system information block in the message.

Optionally, the processing module 1210 is further configured to determine CSG indication information and CSG identification information, where the CSG indication information is used to indicate that the cell where the terminal equipment is located is a CSG cell, or the CSG indication information is used to indicate that the terminal equipment is located. The current cell is not a CSG cell;

The transceiver module 1220 is further configured to send the CSG indication information and the CSG identification information to the first network node.

Optionally, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or

The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

FIG. 20 shows a schematic block diagram of a terminal device 1300 according to an embodiment of the present application. As shown in FIG. 20 , the terminal device 1300 includes:

The transceiver module 1310 receives at least one system information and first indication information from the first network node, where the first indication information is used to indicate the valid area of each system information in the at least one system information;

The processing module 1320 is configured to determine, according to the first indication information, an effective area to which the at least one system information is applied.

Optionally, the transceiver module 1310 is further configured to receive closed subscriber group CSG indication information and CSG identification information from the first network node, where the CSG indication information is used to indicate that the cell where the terminal device is located is a CSG cell, or, The CSG indication information is used to indicate that the cell where the terminal device is located is not a CSG cell.

Optionally, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function.

FIG. 21 shows a schematic block diagram of a network device 1400 according to an embodiment of the present application. As shown in FIG. 21 , the network device 1400 includes:

The processing module 1410 is configured to determine that the terminal device uses a first message to request system information or a system information block, the first message is a random access first message or a random access third message, and the first network node includes a radio link layer at least one of the functions of the control protocol layer, the medium access control layer and the physical layer;

The transceiver module 1420 is configured to send third indication information to the terminal device, where the third indication information is used to instruct the terminal device to use the first message to request system information or a system information block.

Optionally, the first message is a random access first message, and the third indication information is further used to indicate a mapping relationship between at least one system information and a random access preamble sequence.

Optionally, the first message is a third random access message, and the transceiver module 1120 is further configured to receive at least one of system information request response information and conflict resolution identification information from the second network node.

Optionally, the first message is a third random access message, and the transceiver module 1120 is further configured to receive bitmap indication information from the second network node, where the bitmap indication information is used to indicate the data sent to the terminal device. system information or system information blocks;

The transceiver module 1420 is further configured to send a MAC CE to the terminal device, where the MAC CE includes the bitmap indication information;

Or, the transceiver module 1420 forwards the bitmap indication information sent by the second network node to the terminal device, where the bitmap indication information is used to indicate the system information or system information block sent to the terminal device.

FIG. 22 shows a schematic block diagram of a network device 1500 according to an embodiment of the present application. As shown in FIG. 22 , the network device 1500 includes:

A processing module 1510, configured to determine that the terminal device uses a first message to request system information or a system information block, where the first message is a random access first message or a random access third message;

The transceiver module 1520 is configured to send third indication information to the first network node, where the third indication information is used to instruct the first network node to send fourth indication information to the terminal device, and the fourth indication information is used to instruct the terminal The device requests system information or a system information block using the first message;

Wherein, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or

The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

Optionally, the first message is a random access first message, and the third indication information is further used to indicate a mapping relationship between at least one system information and a random access preamble sequence.

Optionally, the first message is a random access first message, and the fourth indication information is further used to indicate a mapping relationship between at least one system information and a random access preamble sequence.

Optionally, the first message is a third random access message, and the third indication information is further used by the first network node to indicate to the terminal device to use the third random access message to request system information, or the third The three indication information is used by the first network node to indicate to the terminal device to use the random access third message to request a system information block.

Optionally, the first message is a random access third message, and the transceiver module 1520 is further configured to send a system information request response to the first network node, where the system information request response includes system information request response information and conflict resolution at least one of the identification information;

Alternatively, the transceiver module 1520 is further configured to send a system information request response to the terminal device through the first network node, where the system information request response includes at least one of system information request response information and conflict resolution identification information.

Optionally, the first message is a third random access message, and the transceiver module 1520 is further configured to send bitmap indication information to the first network node, where the bitmap indication information is used to indicate system information sent to the terminal device;

Alternatively, the transceiver module 1520 is further configured to send bitmap indication information to the terminal device through the first network node, where the bitmap indication information is used to indicate system information or system information blocks sent to the terminal device.

FIG. 23 shows a schematic block diagram of a network device 1600 according to an embodiment of the present application. As shown in FIG. 23 , the network device 1600 includes:

a processing module 1610, configured to generate resource state information, the resource state information including at least one of physical resource blocks, hardware loads and almost blank subframes;

a transceiver module 1620, configured to send the resource status information to the second network node;

Wherein, the network device includes at least one of radio link layer control protocol layer, medium access control layer and physical layer function; and/or

The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

Optionally, the transceiver module 1620 is further configured to receive a resource status request message sent by the second network node, where the resource status request message is used to request the resource status information.

Optionally, the transceiver module 1620 is further configured to receive the resource status information from the third network node of the second network node.

FIG. 24 shows a schematic block diagram of a network device 1700 according to an embodiment of the present application. As shown in FIG. 24 , the network device 1700 includes:

a transceiver module 1710, receiving first resource state information from a first network node, where the first resource state information includes at least one of physical resource blocks, hardware loads, and almost blank subframes;

The processing module 1720 is configured to control the transceiver module 1710 to send second resource status information to the third network node, where the second resource status information includes physical resource blocks, hardware loads, almost blank subframes, transport network layer loads, available capacity, reference at least one of a signal received power measurement report and a channel state information report;

Wherein, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or

The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

Optionally, the transceiver module 1710 is further configured to receive second resource status request information sent by the third network node, where the second resource request information is used to request the second resource status information;

The transceiver module 1710 is further configured to send first resource state request information to the first network node, and the second resource state request information is used to request the first resource state information;

The transceiver module 1710 is further configured to receive a measurement result from the first network node, where the measurement result includes at least one of physical resource blocks, hardware loads, and almost blank subframes.

Optionally, the transceiver module 1710 is also used for:

receiving the second resource status information sent by the third network node;

The first resource status information is sent to the first network node.

FIG. 25 shows a schematic block diagram of a network device 1800 according to an embodiment of the present application. As shown in FIG. 25 , the network device 1800 includes:

The processing module 1810 is configured to generate a second message, where the second message includes fourth indication information, the fourth indication information is used to instruct the terminal device to request system information, or the fourth indication information is used to instruct the terminal device Request to establish an RRC connection;

Alternatively, the processing module 1810 is configured to generate a second message, where the second message is carried on a first logical channel or a second logical channel, where the first logical channel is used to carry a message requesting system information, and the second logical channel is used for Bearing a message requesting an RRC connection;

Alternatively, the processing module 1810 is configured to generate a second message, where the second message uses a first logical channel identifier or a second logical channel identifier, where the first logical channel identifier is used to identify a message requesting system information, and the second logical channel identifier Identifies the message used to identify the request for an RRC connection;

The transceiver module 1820 is configured to send the second message to the first network node, where the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function.

Optionally, the fourth indication information is included in a message header of the fourth message, and the message header may be a MAC layer header or an RLC layer header; or

The fourth indication information is message type information;

FIG. 26 shows a schematic block diagram of a network device 1900 according to an embodiment of the present application. As shown in FIG. 26 , the network device 1900 includes:

The transceiver module 1910 receives a second message from the terminal device, where the second message includes fourth indication information, and the fourth indication information is used to instruct the terminal device to request system information or a system information block, or, the fourth indication information is used for for instructing the terminal device to request to establish an RRC connection, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function;

Alternatively, the transceiver module 1910 is configured to receive a second message on the first logical channel or the second logical channel, the message carried on the first logical channel is used for requesting system information, and the message carried on the second logical channel is used for requesting Establish an RRC connection;

Alternatively, the transceiver module 1910 is configured to receive a second message from the terminal device, where the second message uses the first logical channel identifier, or the second message uses the second logical channel identifier;

a processing module 1920, configured to generate a third message, where the third message includes a first container of the second message, and the message type information of the first container indicates the system information that the terminal device needs to request;

The transceiver module 1910 is further configured to send a third message to the second network node, where the third message includes a first container, and the information in the first container indicates the system information or system information block that the terminal device needs to request. The network node includes at least one of a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer.

FIG. 27 shows a schematic block diagram of a network device 2000 according to an embodiment of the present application. As shown in FIG. 27 , the network device 2000 includes:

A transceiver module 2010, configured to receive a third message from the first network node, where the third message is used to request the establishment of an RRC connection, and the purpose of the third message is determined according to the information of the first container in the third message ;

a processing module 2020, configured to determine that the information in the first container indicates that the terminal device needs to establish an RRC connection;

The processing module 2020 is further configured to determine that the third message does not include a second container, and the second container is an RRC container from the first network node to the second network node;

The transceiver module 2010 is further configured to send rejection indication information to the terminal device through the first network node, where the rejection indication information is used to instruct the terminal device to reject the establishment of the RRC connection.

Optionally, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or

The network device 2000 includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

FIG. 28 shows a schematic block diagram of a network device 2100 according to an embodiment of the present application. As shown in FIG. 28 , the network device 2100 includes:

The transceiver module 2110 is configured to receive a third message from the first network node, where the third message is used to request system information or a system information block, and the purpose of the third message is based on the content of the first container in the third message. information determined;

a processing module 2120, configured to determine that the information of the first container indicates the system information or system information block that the terminal device needs to request;

The transceiver module 2110 is further configured to send system information request response information or bitmap indication information to the terminal device through the first network node, where the bitmap indication information is used to indicate the system information or system information block sent to the terminal device.

Optionally, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or

The network device includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer.

It can be understood that for the terminal equipment, the first network node and the second network node involved in the foregoing embodiments, or the UE, DU (for example, eNB-DU or gNB-DU) and CU involved in the foregoing embodiments (For example, eNB-CU or gNB-CU), the functions involved in any of the designs in the foregoing embodiments of the present application can be implemented by executing program instructions on a hardware platform with a processor and a communication interface. Based on this, as shown in FIG. 29, an embodiment of the present application provides a schematic block diagram of a communication device 2200, where the communication device 2200 includes:

At least one processor 2201, optionally including a communication interface 2202, the communication interface is used to support communication and interaction between the communication device 2200 and other devices; when the program instructions are executed in the at least one processor 2201, the foregoing embodiments of the present application In either design, functionality operating on any of the following devices is implemented: a terminal device, a first network node, and a second network node, or, a UE, a DU (eg, eNB-DU or gNB-DU), and a CU (eg, eNB-CU or gNB-CU). In an optional design, the communication device 2200 may further include a memory 2203 to store program instructions necessary to implement the above-mentioned device functions or process data generated during program execution. Optionally, the communication device 2200 may further include an internal interconnection circuit, so as to realize the communication interaction among the at least one processor 2201 , the communication interface 2202 and the memory 2203 . The at least one processor 2201 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

An embodiment of the present application further provides a chip system, which is applied to a network device. The chip system includes: at least one processor, at least one memory, and an interface circuit, where the interface circuit is responsible for information interaction between the chip system and the outside world, The at least one memory, the interface circuit, and the at least one processor are interconnected by wires, and instructions are stored in the at least one memory; the instructions are executed by the at least one processor to perform all of the above aspects. operations of the first network node or the second network node in the method described above.

An embodiment of the present application further provides a chip system, which is applied to a terminal device, and the chip system includes: at least one processor, at least one memory, and an interface circuit, where the interface circuit is responsible for information interaction between the chip system and the outside world, The at least one memory, the interface circuit, and the at least one processor are interconnected by wires, and instructions are stored in the at least one memory; the instructions are executed by the at least one processor to perform all of the above aspects. operations of the terminal device in the method described above.

An embodiment of the present application further provides a communication system, including: a network device, and/or a terminal device; wherein, the network device is the network device described in the above aspects.

Embodiments of the present application further provide a computer program product, which is applied to a network device, and the computer program product includes a series of instructions, when the instructions are executed, to perform the methods described in the above aspects. Operation of the first network node or the second network node.

In the embodiments of the present application, it should be noted that the foregoing method embodiments in the embodiments of the present application may be applied to a processor, or implemented by a processor. A processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable Logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) And direct memory bus random access memory (DirectRambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It is to be understood that reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic associated with the embodiment is included in at least one embodiment of the present application. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

Additionally, the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that, in this embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is only determined according to A, and B may also be determined according to A and/or other information.

The above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product may include one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic disks), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), and the like.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a removable hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk and other media that can store program codes.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (43)

1. a transmission method, is characterized in that, comprises: The first network node receives first indication information from the second network node, where the first indication information is used to indicate a valid area of each system information in the at least one system information; The first network node sends the at least one system information and the first indication information to the terminal device, so that the terminal device can learn the valid area to which the at least one system information is applied. 2. The method according to claim 1, wherein the method further comprises: The first network node receives first configuration information from the second network node, where the first configuration information includes at least one system information block, scheduling information of the at least one system information block, and the at least one system information block. At least one of the mapping relationship between the information and the at least one system information block, and the scheduling period of each system information in the at least one system information. 3. The method according to claim 2, wherein the method further comprises: The first network node determines second configuration information, the second configuration information is used by the first network node to send the at least one system information, and the second configuration information includes each of the at least one system information. The window length of the system information, the scheduling information of the at least one system information block, the mapping relationship between the at least one system information and the at least one system information block, and at least one of the scheduling periods of each system information in the at least one system information A sort of. The method according to claim 2 or 3, wherein the scheduling information of the at least one system information block comprises a scheduling period of each system information block in the at least one system information block, and the at least one system information block At least one of the alert area list of each system information block in the at least one system information block and the broadcast times of each system information block in the at least one system information. 5. The method according to any one of claims 1 to 4, wherein when the effective area indicates an area level, the first indication information includes an area identifier area ID, or the effective area indicates a cell level and area level, the first indication information includes area ID and bitmap information bitmap. 6. The method according to any one of claims 1 to 5, wherein the first network node comprises at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function ;and / or The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer. 7. A network device, comprising: memory for storing instructions; A processor for invoking instructions in the memory to perform operations according to the method of any one of claims 1 to 6. 8. A transmission method, characterized in that, comprising: The second network node determines the valid area of each system information in the at least one system information; The second network node sends first indication information to the first network node, where the first indication information is used to indicate a valid area of each system information in the at least one system information. 9. The method according to claim 8, wherein the method further comprises: The second network node sends first configuration information to the first network node, where the first configuration information includes at least one system information block, scheduling information of the at least one system information block, the at least one system information and At least one of the mapping relationship of the at least one system information block and the scheduling period of each system information in the at least one system information. The method according to claim 9, wherein the scheduling information of the at least one system information block comprises a scheduling period of each system information block in the at least one system information block, and each system information block in the at least one system information block At least one of the alert area list of each system information block and the broadcast times of each system information block in the at least one system information. 11. The method according to any one of claims 8 to 10, wherein the first network node comprises at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function ;and / or The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer. 12. A network device, comprising: memory for storing instructions; A processor for invoking instructions in said memory to perform operations according to the method of any one of claims 8 to 11. 13. A transmission method, comprising: The first network node determines that the terminal device uses a first message to request system information or a system information block, the first message is a random access first message or a random access third message, and the first network node includes a radio link layer at least one of the functions of the control protocol layer, the medium access control layer and the physical layer; The first network node sends third indication information to the terminal device, where the third indication information is used to instruct the terminal device to use the first message to request system information or a system information block. The method according to claim 13, wherein the first message is a random access first message, and the third indication information is further used to indicate the mapping between at least one system information and a random access preamble sequence relation. 15. The method according to claim 13, wherein the first message is a random access third message, and the method further comprises: The first network node receives at least one of system information request response information and conflict resolution identification information from the second network node. 16. The method according to claim 13, wherein the first message is a random access third message, the method further comprising: The first network node receives bitmap indication information from the second network node, where the bitmap indication information is used to indicate the system information or system information block sent to the terminal device; sending, by the first network node, a media access control layer control element MAC CE to the terminal device, where the MAC CE includes the bitmap indication information; Or, the first network node forwards the bitmap indication information sent by the second network node to the terminal device, where the bitmap indication information is used to indicate the system information or system information block sent to the terminal device. 17. A network device, comprising: memory for storing instructions; A processor for invoking instructions in said memory to perform operations according to the method of any one of claims 13 to 16. 18. A transmission method, comprising: The first network node sends resource status information to the second network node, the resource status information includes at least one of physical resource blocks, hardware loads, and almost blank subframes; Wherein, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer. 19. The method according to claim 18, wherein before the first network node sends the resource status information to the second network node, the method further comprises: The first network node receives a resource status request message sent by the second network node, where the resource status request message is used to request the resource status information. 20. The method according to claim 18 or 19, wherein the method further comprises: The first network node receives the resource status information from a third network node of the second network node. 21. A network device, comprising: memory for storing instructions; A processor for invoking instructions in said memory to perform operations according to the method of any one of claims 18 to 20. 22. A transmission method, comprising: The second network node receives first resource status information from the first network node, the first resource status information includes at least one of physical resource blocks, hardware loads, and almost blank subframes; The second network node sends second resource status information to the third network node, where the second resource status information includes physical resource blocks, hardware load, almost blank subframes, transport network layer load, available capacity, reference signal received power at least one of a measurement report and a channel state information report; Wherein, the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function; and/or The second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer. 23. The method according to claim 22, wherein before the second network node receives the first resource status information from the first network node, the method further comprises: receiving, by the second network node, second resource status request information sent by the third network node, where the second resource request information is used to request the second resource status information; sending, by the second network node, first resource status request information to the first network node, where the second resource status request information is used to request the first resource status information; The second network node receives measurement results from the first network node, the measurement results including at least one of physical resource blocks, hardware loads, and almost blank subframes. 24. The method according to claim 22 or 23, wherein the method further comprises: receiving, by the second network node, the second resource status information sent by the third network node; The second network node sends the first resource status information to the first network node. 25. A network device, comprising: memory for storing instructions; A processor for invoking instructions in said memory to perform operations according to the method of any one of claims 22 to 24. 26. A transmission method, comprising: The terminal device generates a second message, where the second message includes fourth indication information, where the fourth indication information is used to instruct the terminal device to request system information or a system information block, or the fourth indication information is used to instructing the terminal device to request the establishment of an RRC connection; Or, the terminal device generates a second message, where the second message is carried on a first logical channel or a second logical channel, where the first logical channel is used to carry a message requesting system information or a system information block, and the second logical channel The channel is used to carry the message requesting the RRC connection; Alternatively, the terminal device generates a second message, where the second message uses a first logical channel identifier or a second logical channel identifier, the first logical channel identifier is used to identify a message requesting system information, and the second logical channel identifier A message used to identify a request for an RRC connection; The terminal device sends the second message to a first network node, where the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function. 27. The method according to claim 26, wherein the fourth indication information is included in a message header of a fourth message, and the message header may be a medium access control (MAC) layer header or a radio link layer control (RLC) header. Protocol RLC layer header; or The fourth indication information is message type information. 28. A terminal device, comprising: memory for storing instructions; A processor for invoking instructions in said memory to perform operations according to the method of claim 26 or 27. 29. A transmission method, comprising: The first network node receives a second message from the terminal device, where the second message includes fourth indication information, where the fourth indication information is used to instruct the terminal device to request system information or a system information block, or, the The fourth indication information is used to instruct the terminal device to request to establish an RRC connection, and the first network node includes at least one of a radio link layer control protocol layer, a medium access control layer, and a physical layer function; Alternatively, the first network node receives the second message on the first logical channel or the second logical channel, the message carried on the first logical channel is used to request system information, and the message carried on the second logical channel is used to request Establish an RRC connection; Alternatively, the first network node receives a second message from the terminal device, and the second message uses the first logical channel identifier, or the second message uses the second logical channel identifier; The first network node sends a third message to the second network node, where the third message includes a first container of the second message, and the information of the first container indicates the system information that the terminal device needs to request or In the system information block, the second network node includes at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer. 30. A network device, comprising: memory for storing instructions; a processor for invoking instructions in said memory to perform operations according to the method of claim 29. 31. A transmission method, comprising: The second network node receives a third message from the first network node, the third message is used to request the establishment of an RRC connection, and the purpose of the third message is determined according to the information of the first container of the third message ; The second network node determines that the third message does not include a second container, and the second container is an RRC container from the first network node to the second network node; The second network node sends rejection indication information to the terminal device through the first network node, where the rejection indication information is used to indicate that the terminal device is not allowed to establish an RRC connection. 32. A network device, comprising: memory for storing instructions; a processor for invoking instructions in said memory to perform operations according to the method of claim 31 . 33. A transmission method, comprising: The second network node receives a third message from the first network node, the third message is used to request system information or a system information block, and the purpose of the third message is according to the first container of the third message. information determined; The second network node sends system information request response information or bitmap indication information to the terminal device through the first network node, where the bitmap indication information is used to indicate the system information or system information block sent to the terminal device. 34. A network device, comprising: memory for storing instructions; a processor for invoking instructions in said memory to perform operations according to the method of claim 33. 35. A transmission method, comprising: The control plane node receives fifth indication information sent by the user plane node, where the fifth indication information is used to indicate a radio link failure of the first network node; The control plane node determines whether to switch the first network node according to the fifth indication information; wherein, The protocol stack architecture of the control plane node is at least one of a radio resource control protocol layer, a service data adaptation layer, and a packet data convergence protocol layer; and/or The protocol stack architecture of the first network node is at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function. 36. A network device, comprising: memory for storing instructions; a processor for invoking instructions in said memory to perform operations according to the method of claim 35. 37. A transmission method, comprising: The user plane node sends fifth indication information to the control plane node, where the fifth indication information is used to indicate a radio link failure of the first network node; wherein The protocol stack architecture of the user plane node is at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer; and/or The protocol stack architecture of the first network node is at least one of a radio link layer control protocol layer, a medium access control layer and a physical layer function. 38. The method of claim 37, wherein the method further comprises: The user plane node receives a user plane interface message sent by the first network node, where the user plane interface message is used to indicate a radio link failure of the first network node. 39. A network device, comprising: memory for storing instructions; A processor for invoking instructions in said memory to perform operations according to the method of claim 37 or 38. 40. A transmission method, comprising: The first control plane node sends sixth indication information to the first user plane node, where the sixth indication information is used to trigger allocation of the data forwarding address of the first bearer; The first control plane node receives the data forwarding address sent by the first user plane node; wherein, The protocol stack architecture of the first control plane node is at least one of a radio resource control protocol layer, a service data adaptation layer and a packet data convergence protocol layer. 41. The method of claim 40, wherein the method further comprises: The data forwarding address sent by the first control plane node to the second user plane node. 42. The method of claim 40, wherein the method further comprises: The first control plane node sends the data forwarding address to the second user plane node through the second control plane node. 43. A network device, comprising: memory for storing instructions; A processor for invoking instructions in said memory to perform operations according to the method of any one of claims 40 to 42.