CN104519529A - Method, equipment and system for transmission control on user equipment - Google Patents

Abstract

The object of the present invention is to provide a method, device and system for performing transmission control on user equipment. When the user equipment forms a dual connection with the corresponding macro base station and the small base station, the transmission state information corresponding to the DRB established by the user equipment is determined by the user equipment, and sent to the macro base station, Then, the macro base station determines transmission configuration information corresponding to the user equipment according to the transmission state information, and performs transmission configuration on the user equipment according to the transmission configuration information. Compared with the prior art, the present invention acquires PDUs that need to be transmitted or retransmitted according to the transmission state information of the user equipment on the basis of dual connectivity, or the macro base station performs flow control on the user equipment according to the transmission state information , which ensures the connection establishment and switching between the user equipment and the macro base station and the small base station, improves the reliability of data transmission, improves the resource allocation efficiency of the system, and reduces the power consumption of the system.

Description

A method, device and system for performing transmission control on user equipment

technical field

The present invention relates to the communication field, and in particular to a technology for performing transmission control on user equipment.

Background technique

Currently, if the user equipment is connected to the macro base station or the small base station through a single connection mode, that is, the user equipment is only connected to one of the macro base station or the small base station, the user equipment in the network When moving between cells, it is necessary to continuously switch between the macro base station and the small base station, which can easily cause handover failure.

In the standard R12 of 3GPP LTE, a new research project "Small Cell Enhancement for E-UTRA and E-UTRAN-High Level" is proposed. One of the important aspects is to support macro cells (cells covered by macro base stations) ) layer and the dual connectivity of the small cell layer.

Figure 1 shows the dual connection of user equipment in MeNB (macro base station, Macro eNB) and SeNB (small base station, Small eNB). Wherein, the user equipment forms a dual connection with a corresponding macro base station and a small base station, and the dual connection includes a connection between the macro base station and the user equipment and a connection between the small base station and the user equipment.

In the discussion of RAN2, the following user plane protocol architecture that can be used for dual connectivity is defined:

-1A: S1-U is terminated at SeNB and has independent PDCP (no bearer split, no bearer split);

-2A: S1-U is terminated at MeNB, there is no bearer separation in MeNB, and there is an independent PDCP entity in SeNB (as shown in Figure 2(a));

-2C: S1-U is terminated at MeNB, there is no bearer separation in MeNB, and there is an independent RLC entity in SeNB (as shown in Figure 2(b));

-3C: S1-U is terminated at MeNB, there is bearer separation in MeNB, and there is an independent RLC entity for the separated bearer (as shown in Figure 2(c));

-3D: S1-U is terminated at MeNB, and there is bearer separation in MeNB, and there are master-slave RLC entities for the separated bearers.

Under 2A, 2C and 3C, if there is data loss on the interface between MeNB and SeNB, the lost data cannot be recovered for the user equipment under the current mechanism, so that the user equipment cannot obtain complete information, and the user Very bad experience.

Contents of the invention

The object of the present invention is to provide a method, device and system for performing transmission control on user equipment.

According to one aspect of the present invention, there is provided a method for performing transmission control on user equipment, wherein the user equipment forms a dual connection with a corresponding macro base station and a small base station, and the dual connection includes the macro base station and the small base station The connection of the user equipment and the connection between the small base station and the user equipment, the method includes the following steps:

a. The user equipment determines transmission status information corresponding to the DRB established by the user equipment, where the transmission status information includes PDCP status information or DRB data-related status information;

b. the user equipment sends the transmission status information to the macro base station;

c, the macro base station determines transmission configuration information corresponding to the user equipment according to the transmission state information;

d, the macro base station performs transmission configuration on the user equipment according to the transmission configuration information.

According to another aspect of the present invention, a macro base station for implementing transmission control on user equipment is provided, wherein the user equipment forms a dual connection with a corresponding macro base station and a small base station, and the dual connection includes the The connection between the macro base station and the user equipment and the connection between the small base station and the user equipment include:

obtaining means, configured to obtain transmission state information corresponding to the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related state information;

Configuration determining means, configured to determine transmission configuration information corresponding to the user equipment according to the transmission status information;

Configuration means, configured to perform transmission configuration on the user equipment according to the transmission configuration information.

According to yet another aspect of the present invention, there is also provided a user equipment for assisting in implementing transmission control on user equipment, wherein the user equipment forms a dual connection with a corresponding macro base station and a small base station, and the dual connection includes The connection between the macro base station and the user equipment and the connection between the small base station and the user equipment include:

A state determining device, configured to determine transmission state information corresponding to the DRB established by the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related state information;

A status sending device, configured to send the transmission status information to the macro base station.

According to yet another aspect of the present invention, there is also provided a small base station for assisting in implementing transmission control on user equipment, wherein the user equipment forms a dual connection with a corresponding macro base station and a small base station, and the dual connection includes The connection between the macro base station and the user equipment and the connection between the small base station and the user equipment include:

Configuring the obtaining device, used to obtain the PDCP PDU sent by the macro base station that needs to be transmitted or retransmitted;

A transmission sending device, configured to send the PDCP PDU to the user equipment.

According to another aspect of the present invention, there is also provided a system for implementing transmission control on user equipment, wherein the user equipment forms a dual connection with a corresponding macro base station and a small base station, and the dual connection includes the The connection between the macro base station and the user equipment and the connection between the small base station and the user equipment, the system includes the above-mentioned macro base station, the above-mentioned user equipment, and the above-mentioned small base station.

Compared with the prior art, in the present invention, when the user equipment forms a dual connection with the corresponding macro base station and the small base station, the transmission state information corresponding to the DRB established by the user equipment is determined by the user equipment, and sending the transmission status information to the macro base station, and then the macro base station determines transmission configuration information corresponding to the user equipment according to the transmission status information, and sends the user equipment The device performs transmission configuration; thus, on the basis of dual connectivity, according to the transmission status information of the user equipment, the PDU that needs to be transmitted or retransmitted is obtained for the user equipment or the macro base station sends the user equipment according to the transmission status information The flow control of the device ensures the establishment and switching of the connection between the user equipment and the macro base station and the small base station, improves the reliability of data transmission, improves the resource allocation efficiency of the system, and reduces the power consumption of the system.

Moreover, in the present invention, the user equipment may determine the transmission state information corresponding to the DRB established by the user equipment, wherein the DRB established by the user equipment is the user equipment offloaded to the small base station The established DRB; further, the user equipment may also determine the transmission status information corresponding to the DRB established by the user equipment according to a predetermined trigger condition; thus ensuring that when the DRB established by the user equipment is When the user equipment is offloaded to the DRB established by the small base station, the connection establishment and handover between the user equipment, the macro base station and the small base station are realized, the reliability of data transmission is improved, the resource allocation efficiency of the system is improved, and the system power consumption, etc.

Moreover, when the transmission configuration information includes PDUs that need to be transmitted or retransmitted, in the present invention, the macro base station may send the PDUs that need to be transmitted or retransmitted to the small base station according to the transmission configuration information, Then the small base station sends the PDU to the user equipment; thereby realizing the transmission or retransmission of the PDU under various user plane protocol frameworks, and realizing the connection establishment and connection between the user equipment and the macro base station and the small base station Switching improves the reliability of data transmission, improves the resource allocation efficiency of the system, and reduces the power consumption of the system.

Moreover, when the macro base station includes bearer separation, and there are independent RLC entities on the side of the macro base station and the side of the small base station for the separated bearers, and when the transmission configuration information includes In the present invention, the macro base station can also send the PDCP PDU that needs to be transmitted or retransmitted to the RLC entity located in the macro base station according to the transmission configuration information, and then the macro base station sends the PDCP PDU to the RLC entity located in the macro base station The above PDCP PDU is sent to the user equipment; thereby realizing the transmission or retransmission of the PDU under the specific user plane protocol architecture (3C), realizing the connection establishment and handover between the user equipment and the macro base station and the small base station, and improving the data The reliability of the transmission improves the resource allocation efficiency of the system and reduces the power consumption of the system.

Moreover, when the transmission configuration information includes flow control information, in the present invention, the macro base station can implement flow control on the DRB offloaded to the small base station according to the transmission configuration information; The flow control ensures the connection establishment and switching between the user equipment and the macro base station and the small base station, improves the reliability of data transmission, improves the resource allocation efficiency of the system, and reduces the power consumption of the system.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Fig. 1 shows a schematic diagram of dual connection of user equipment in MeNB (macro base station) and SeNB (small base station) according to one aspect of the present invention;

FIG. 2 shows a schematic diagram of three user plane protocol architectures that can be used for dual connectivity according to an aspect of the present invention;

FIG. 3 shows a schematic diagram of a user equipment and a macro base station for performing transmission control on user equipment according to an aspect of the present invention;

FIG. 4 shows a schematic diagram of user equipment, a macro base station, and a small base station for performing transmission control on user equipment according to a preferred embodiment of the present invention;

FIG. 5 shows a schematic diagram of a dual connection in which a PDCP PDU sent to a small base station has data loss according to a preferred embodiment of the present invention;

FIG. 6 shows a flow chart of a method for implementing transmission control on user equipment by cooperation between user equipment and a macro base station according to another aspect of the present invention;

Fig. 7 shows a flow chart of a method for controlling transmission of user equipment implemented by cooperation of user equipment, macro base station and small base station according to a preferred embodiment of the present invention.

The same or similar reference numerals in the drawings represent the same or similar components.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 3 shows a schematic diagram of a user equipment and a macro base station for performing transmission control on user equipment according to an aspect of the present invention; wherein, the user equipment 1 includes a state determining device 11 and a state sending device 12, the The macro base station 2 includes acquiring means 21 , configuration determining means 22 and configuring means 23 . The user equipment 1 cooperates with each device of the macro base station 2 to implement transmission control on the user equipment; wherein, the user equipment forms a dual connection with the corresponding macro base station and small base station, and the dual connection includes all connection between the macro base station and the user equipment and connection between the small base station and the user equipment.

Specifically, the state determining means 11 of the user equipment 1 determines transmission state information corresponding to a DRB (Data Radio Bearer, data radio bearer) established by the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related state information; the state sending means 12 sends the transmission state information to the macro base station; correspondingly, the obtaining means 21 of the macro base station 2 obtains the transmission state information corresponding to the user equipment, wherein , the transmission state information includes PDCP state information or DRB data-related state information; the configuration determining means 22 determines the transmission configuration information corresponding to the user equipment according to the transmission state information; the configuration means 23 determines the transmission configuration information corresponding to the user equipment according to the transmission configuration information , performing transmission configuration on the user equipment.

Here, the above method can be used in the user plane protocol framework 2A, 2C, 3C or 3D.

The user equipment 1 includes, but is not limited to, any device that can be connected to the macro base station, such as a personal computer, a smart phone, or a tablet computer; the macro base station 2 may be a base station serving as a control base station in a macro cell, or It may be the primary base station in the primary base station-secondary base station structure. Here, the network includes but not limited to 3GPP and so on. Moreover, the communication modes between the macro base station 2 and each user equipment 1 are independent of each other.

The above-mentioned devices are continuously working. Here, those skilled in the art should understand that "continuous" means that the above-mentioned devices transmit status information in real time, or according to the set or real-time adjusted working mode requirements. Determination, sending and receiving of transmission state information, determination of transmission configuration information, transmission configuration, etc., until the user equipment stops determining the transmission state information corresponding to the DRB established by the user equipment.

The state determination module 11 of the user equipment 1 determines transmission state information corresponding to the DRB established by the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related state information.

Here, the user equipment forms a dual connection with the corresponding macro base station and the small base station; a method for forming the dual connection between the user equipment and the corresponding macro base station and the small base station is shown here:

Specifically, when the user equipment accesses the macro base station, the user equipment establishes an RRC connection with the macro base station. At this time, the user equipment only has one RRC connection with the macro base station; The throughput requirement of the user equipment configures the small base station for the user equipment, for example, the macro base station coordinates with the small base station to allocate resources for the user equipment and obtains the relevant configuration information of the small base station from the small base station, so The macro base station sends at least part of the downlink data to the small base station for transmission to the user equipment when the user equipment accesses the small base station, and the macro base station obtains the small base station's The related configuration information is sent to the user equipment; the user equipment receives the related configuration information of the small base station from the macro base station, and accesses the small base station. At this point, the user equipment has dual connectivity.

The state determining means 11 determines transmission state information corresponding to the DRB established by the user equipment based on the PDU data information acquired by the user equipment; wherein the transmission state information includes PDCP state information or DRB data related status information.

Here, when the user plane protocol architecture is 2C or 3C, the PDCP PDU is sent to the SeNB through the Xn interface (or enhanced X2 interface), and the transmission status information is PDCP status information. Here, the PDCP status Information such as PDCPSN (serial number) not received/received;

When the user plane protocol architecture is 2A, a new layer needs to be introduced above the PDCP layer of the MeNB. This layer is used for the MeNB to store the data packets sent from the core network and offloaded to the DRB of the small base station, and at the same time Send the data packet to the PDCP entity located in the small base station through the Xn interface; then the user equipment 1 will determine the DRB data-related status information on the new layer corresponding to the DRB established by the user equipment, and the DRB data related The status information includes sequence information of PDU information that has been acquired and/or has not been acquired; thus, when the DRB data-related status information is sent to the macro base station, the macro base station can acquire the current transmission status of the PDU.

Preferably, the state determining means 11 of the user equipment 1 may determine transmission state information corresponding to the DRB established by the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related state information, the The DRB established by the user equipment is the DRB established by the user equipment offloaded to the small base station. The DRB offloaded to the small base station refers to the DRB that is provided by the small cell under the jurisdiction of the small base station with uplink and downlink transmission services for the DRB.

Specifically, the state determining means 11 determines transmission state information corresponding to the DRB established by the user equipment based on the PDU data information acquired by the user equipment; wherein the transmission state information includes PDCP state information or DRB data related status information. Wherein, the DRB established by the user equipment is the DRB established by the user equipment offloaded to the small base station, so this method is not used for other DRBs only established on the macro base station, so as to improve processing efficiency and reduce UE processing complexity.

Here, those skilled in the art should understand that when the DRB established by the user equipment is the DRB established by the user equipment offloaded to the small base station, other processing steps of the state determination device 11, such as The processing method in the user plane protocol framework of 2A, 2C, 3C or 3D is the same or similar to the processing method of the state determining device 11 in the above-mentioned FIG. this.

More preferably, the state determination unit 11 of the user equipment 1 may determine transmission state information corresponding to the DRB established by the user equipment according to a predetermined trigger condition, wherein the transmission state information includes PDCP state information or DRB Data-related state information, the DRB established by the user equipment is the DRB established by the user equipment offloaded to the small base station.

Specifically, wherein the predetermined trigger condition includes at least any of the following:

-Event trigger conditions configured by the user equipment: for example, the user equipment actively configures event trigger conditions according to a method agreed in the protocol or a self-defined method, wherein the event trigger conditions include but are not limited to the The user equipment detects a lost PDCP data packet (for example, by detecting the PDCP SN, when it detects that a PDCP data packet with a low sequence number has not been received, it is determined to be a lost PDCP data packet), or the user equipment detects a lost PDCP data packet. When the PDCP packet lasts longer than a predetermined time (such as one second);

-Periodic trigger conditions configured by the user equipment: for example, the user equipment actively configures the periodic trigger conditions according to the method stipulated in the protocol or a self-defined method, wherein the periodic trigger conditions are, for example, the user equipment determining PDCP status information corresponding to the DRB established by the user equipment at every predefined time interval;

-Event trigger conditions configured by the macro base station: for example, the user equipment acquires event trigger conditions configured by the macro base station by interacting with the macro base station, wherein the event trigger conditions include but are not limited to When the user equipment detects a lost PDCP data packet (such as by detecting the PDCP SN), or the user equipment detects that the lost PDCP data packet lasts for more than a predetermined time (such as one second);

- Periodic trigger conditions configured by the macro base station: for example, the user equipment interacts with the macro base station to obtain the periodic trigger conditions configured by the macro base station, wherein the periodic trigger conditions are as follows The user equipment determines the PDCP state information corresponding to the DRB established by the user equipment every fixed time interval (the time interval is configured by the macro base station).

The status sending means 12 sends the transmission status information to the macro base station.

Specifically, after the state determining means 11 determines the transmission state information corresponding to the DRB established by the user equipment, the state sending means 12 sends the transmission state information to the macro base station.

Correspondingly, the obtaining unit 21 of the macro base station 2 obtains transmission state information corresponding to the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related state information.

The configuration determining module 22 determines transmission configuration information corresponding to the user equipment according to the transmission status information.

Specifically, as shown in FIG. 5 , when the transmission status information includes PDCP status information or DRB data-related status information, the configuration determining means 22 knows which ones should be transmitted to the user based on the transmission status information. The PDU data of the device has not been transmitted to the user equipment, so that the configuration determining means 22 uses the PDU data that needs to be transmitted or retransmitted as the transmission configuration corresponding to the user equipment according to the transmission status information information;

Alternatively, the configuration determining means 22 learns which data has been transmitted to the user equipment according to the transmission state information, so that the configuration determining means 22 determines which data corresponds to the user equipment according to the transmission state information. flow control information.

The configuration module 23 performs transmission configuration on the user equipment according to the transmission configuration information.

Specifically, the configuring means 23 acquires the transmission configuration information determined by the configuration determining means 22, and performs corresponding transmission configurations on the user equipment according to different transmission configuration information.

For example, preferably, when the transmission configuration information includes flow control information, the configuring device 23 may implement flow control on the DRB offloaded to the small base station according to the transmission configuration information.

Specifically, in the user plane protocol architectures 2A, 2C, 3C, and 3D, the configuration device 23 adjusts the data transmission rate for sending the DRB to the small base station according to the transmission configuration information, so as to realize the offloading to the small base station. The DRB implements flow control, which can prevent the small base station from sending buffer status reports or transmission status reports to the macro base station, because when the one-way backhaul delay reaches 60ms, the transmission status information sent by the user equipment is faster than the buffer report sent by the small base station faster, thus increasing the effectiveness of flow control in macro base stations.

For example, preferably, when the macro base station includes bearer separation, and there are independent RLC entities on the side of the macro base station and the side of the small base station for the separated bearers, when the transmission configuration information includes the need to transmit or retransmitted PDCP PDUs, the configuration device 23 can send the PDCP PDUs that need to be transmitted or retransmitted to the RLC entity located in the macro base station according to the transmission configuration information; wherein the macro base station also includes sending means (not shown), the sending means sends the PDCP PDU to the user equipment.

Specifically, when the macro base station includes bearer separation, and there are independent RLC entities on the side of the macro base station and the side of the small base station for the separated bearers (that is, in the user plane protocol framework 3C), when the When the transmission configuration information includes PDCP PDUs that need to be transmitted or retransmitted, the configuration device 23 sends the PDCP PDUs that need to be transmitted or retransmitted to the macro base station according to the PDCP PDUs that need to be transmitted or retransmitted. RLC entity; then the sending device in the macro base station directly sends the PDCP PDU to the user equipment.

Fig. 4 shows a schematic diagram of a user equipment, a macro base station, and a small base station for performing transmission control on user equipment according to a preferred embodiment of the present invention; wherein, the user equipment 1' includes a state determining device 11', The state sending device 12', the macro base station 2' includes an obtaining device 21', a configuration determining device 22', and a configuration device 23', and the small base station 3' includes a configuration obtaining device 31' and a transmission sending device 32'. Each device of the user equipment 1', the macro base station 2', and the small base station 3' cooperates with each other to implement transmission control on the user equipment; wherein, the user equipment constitutes a corresponding macro base station and a small base station Dual connectivity, where the dual connectivity includes the connection between the macro base station and the user equipment and the connection between the small base station and the user equipment.

Specifically, the state determining means 11' of the user equipment 1' determines transmission state information corresponding to a DRB (Data Radio Bearer, Data Radio Bearer) established by the user equipment, wherein the transmission state information includes PDCP Status information or DRB data-related status information; the status sending means 12' sends the transmission status information to the macro base station; correspondingly, the acquisition means 21' of the macro base station 2' acquires the information corresponding to the user equipment transmission status information, wherein the transmission status information includes PDCP status information or DRB data-related status information; the configuration determining means 22' determines transmission configuration information corresponding to the user equipment according to the transmission status information, wherein the The transmission configuration information includes PDUs that need to be transmitted or retransmitted; the configuration device 23' sends the PDUs that need to be transmitted or retransmitted to the small base station according to the transmission configuration information; correspondingly, the small base station 3' The configuration acquiring unit 31' acquires the PDU sent by the macro base station and needs to be transmitted or retransmitted; the transmission sending unit 32' sends the PDU to the user equipment.

Wherein, the state determination means 11' and the state sending means 12' of the user equipment 1', the acquisition means 21' and the configuration determination means 22' of the macro base station 2' are the same or substantially the same as the corresponding means shown in FIG. 3 , Therefore, it will not be described in detail here, and it is included here by reference.

Here, the above method can be used in the user plane protocol framework 2A, 2C, 3C or 3D.

The above-mentioned devices are continuously working. Here, those skilled in the art should understand that "continuous" means that the above-mentioned devices transmit status information in real time, or according to the set or real-time adjusted working mode requirements. Determine, send and receive transmission status information, determine transmission configuration information, transmit configuration, and send PDUs to user equipment, etc., until the user equipment stops determining the transmission status information corresponding to the DRB established by the user equipment .

The configuring device 23' sends the PDUs that need to be transmitted or retransmitted to the small base station according to the transmission configuration information.

Specifically, here, the PDUs that need to be transmitted or retransmitted include but are not limited to PDCP PDUs (such as in the user plane protocol framework 2C or 3C) and new layer PDUs above PDCP (such as in the user plane protocol framework 2A ). The configuration device 23' sends the PDUs that need to be transmitted or retransmitted to the small base station based on various communication protocols according to the transmission configuration information.

Correspondingly, the configuration acquisition unit 31' of the small base station 3' acquires the PDUs sent by the macro base station that need to be transmitted or retransmitted based on various communication protocols. The transmission sending means 32' sends the PDU to the user equipment.

Fig. 6 shows a flow chart of a method for implementing transmission control on user equipment by cooperation of user equipment and macro base station according to another aspect of the present invention. Each step of the user equipment 1 and the macro base station 2 cooperates with each other to implement transmission control on the user equipment; wherein, the user equipment forms a dual connection with the corresponding macro base station and the small base station, and the dual connection includes all connection between the macro base station and the user equipment and connection between the small base station and the user equipment.

Specifically, in step s1, the user equipment determines transmission state information corresponding to the DRB (Data Radio Bearer, data radio bearer) established by the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related status information; in step s2, the user equipment sends the transmission status information to the macro base station; correspondingly, in step s2, the macro base station obtains the transmission corresponding to the user equipment Status information, wherein the transmission status information includes PDCP status information or DRB data-related status information; in step s3, the macro base station determines transmission configuration information corresponding to the user equipment according to the transmission status information; In step s4, the macro base station performs transmission configuration on the user equipment according to the transmission configuration information.

Here, the above method can be used in the user plane protocol framework 2A, 2C, 3C or 3D.

The above-mentioned steps are continuously working. Here, those skilled in the art should understand that "continuous" means that the above-mentioned steps respectively transmit status information in real time, or according to the requirements of the set or real-time adjusted working mode. Determination, sending and receiving of transmission state information, determination of transmission configuration information, transmission configuration, etc., until the user equipment stops determining the transmission state information corresponding to the DRB established by the user equipment.

In step s1, the user equipment determines transmission state information corresponding to the DRB established by the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related state information.

Here, the user equipment forms a dual connection with the corresponding macro base station and the small base station; a method for forming the dual connection between the user equipment and the corresponding macro base station and the small base station is shown here:

Specifically, when the user equipment accesses the macro base station, the user equipment establishes an RRC connection with the macro base station. At this time, the user equipment only has one RRC connection with the macro base station; The throughput requirement of the user equipment configures the small base station for the user equipment, for example, the macro base station coordinates with the small base station to allocate resources for the user equipment and obtains the relevant configuration information of the small base station from the small base station, so The macro base station sends at least part of the downlink data to the small base station for transmission to the user equipment when the user equipment accesses the small base station, and the macro base station obtains the small base station's The related configuration information is sent to the user equipment; the user equipment receives the related configuration information of the small base station from the macro base station, and accesses the small base station. At this point, the user equipment has dual connectivity.

In step s1, the user equipment determines the transmission state information corresponding to the DRB established by the user equipment based on the PDU data information obtained by the user equipment; wherein the transmission state information includes PDCP state information Or DRB data-related status information.

Here, when the user plane protocol architecture is 2C or 3C, the PDCP PDU is sent to the SeNB through the Xn interface (or enhanced X2 interface), and the transmission status information is PDCP status information. Here, the PDCP status Information such as PDCPSN (serial number) not received/received;

When the user plane protocol architecture is 2A, a new layer needs to be added above the PDCP layer of the MeNB, which can store data packets sent from the core network and offloaded to the DRB of the small base station; at the same time, the data The packet is sent to the PDCP entity located in the small base station through the Xn interface, then the user equipment 1 will determine the DRB data-related state information on the new layer corresponding to the DRB established by the user equipment, and the DRB data-related state information includes the PDU sequence information that has been acquired and/or has not been acquired; thus, when the DRB data-related status information is sent to the macro base station, the macro base station can acquire the current transmission status of the PDU.

Preferably, in step s1, the user equipment may determine transmission state information corresponding to the DRB established by the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related state information, the The DRB established by the user equipment is the DRB established by the user equipment offloaded to the small base station. The DRB offloaded to the small base station refers to the DRB that is provided by the small cell under the jurisdiction of the small base station with uplink and downlink transmission services for the DRB.

Specifically, in step s1, the user equipment determines transmission state information corresponding to the DRB established by the user equipment based on the PDU data information acquired by the user equipment; wherein the transmission state information includes PDCP Status information or DRB data related status information. Wherein, the DRB established by the user equipment is the DRB established by the user equipment offloaded to the small base station, so this method is not used for other DRBs only established on the macro base station, so as to improve processing efficiency and reduce UE processing complexity.

Here, those skilled in the art should understand that when the DRB established by the user equipment is the DRB established by the user equipment offloaded to the small base station, in step s1, other processing of the user equipment Steps, such as the processing method in the user plane protocol architecture of 2A, 2C, 3C or 3D are the same or similar to the processing method of the step s1 in the above-mentioned FIG. here.

More preferably, in step s1, the user equipment may determine transmission status information corresponding to the DRB established by the user equipment according to a predetermined trigger condition, wherein the transmission status information includes PDCP status information or DRB data Related state information, the DRB established by the user equipment is the DRB established by the user equipment offloaded to the small base station.

Specifically, wherein the predetermined trigger condition includes at least any of the following:

-Event trigger conditions configured by the user equipment: for example, the user equipment actively configures event trigger conditions according to a method agreed in the protocol or a self-defined method, wherein the event trigger conditions include but are not limited to the The user equipment detects a lost PDCP data packet (for example, by detecting the PDCP SN, when it detects that a PDCP data packet with a low sequence number has not been received, it is determined to be a lost PDCP data packet), or the user equipment detects a lost PDCP data packet. When the PDCP packet lasts longer than a predetermined time (such as one second);

-Periodic trigger conditions configured by the user equipment: for example, the user equipment actively configures the periodic trigger conditions according to the method stipulated in the protocol or a self-defined method, wherein the periodic trigger conditions are, for example, the user equipment determining PDCP status information corresponding to the DRB established by the user equipment at every predefined time interval;

-Event trigger conditions configured by the macro base station: for example, the user equipment acquires event trigger conditions configured by the macro base station by interacting with the macro base station, wherein the event trigger conditions include but are not limited to When the user equipment detects a lost PDCP data packet (such as by detecting the PDCP SN), or the user equipment detects that the lost PDCP data packet lasts for more than a predetermined time (such as one second);

- Periodic trigger conditions configured by the macro base station: for example, the user equipment interacts with the macro base station to obtain the periodic trigger conditions configured by the macro base station, wherein the periodic trigger conditions are as follows The user equipment determines the PDCP state information corresponding to the DRB established by the user equipment every fixed time interval (the time interval is configured by the macro base station).

In step s2, the user equipment sends the transmission state information to the macro base station.

Specifically, after the step s1 determines the transmission state information corresponding to the DRB established by the user equipment, in step s2, the user equipment sends the transmission state information to the Describe the macro base station.

Correspondingly, in step s2, the macro base station acquires transmission state information corresponding to the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related state information.

In step s3, the macro base station determines transmission configuration information corresponding to the user equipment according to the transmission state information.

Specifically, as shown in FIG. 5, when the transmission status information includes PDCP status information or DRB data-related status information, in step s3, the macro base station learns which ones should be transmitted to The PDU data of the user equipment has not been transmitted to the user equipment, so in step s3, the macro base station uses the PDU data that needs to be transmitted or retransmitted as the communication with the user equipment according to the transmission status information The transmission configuration information corresponding to the device;

Alternatively, in step s3, the macro base station learns which data has been transmitted to the user equipment according to the transmission state information, so that in step s3, the macro base station determines and Flow control information corresponding to the user equipment.

In step s4, the macro base station performs transmission configuration on the user equipment according to the transmission configuration information.

Specifically, in step s4, the macro base station acquires the transmission configuration information determined in step s3, and performs corresponding transmission configuration on the user equipment according to different transmission configuration information.

For example, preferably, when the transmission configuration information includes flow control information, in step s4, the macro base station may implement flow control on the DRB offloaded to the small base station according to the transmission configuration information.

Specifically, in the user plane protocol framework 2A, 2C, 3C or 3D, in step s4, the macro base station adjusts the data transmission rate for sending the DRB to the small base station according to the transmission configuration information, so as to realize the The DRB offloaded to the small base station implements flow control, which can prevent the small base station from sending buffer status reports or transmission status reports to the macro base station, because when the one-way backhaul delay reaches 60ms, the transmission status information sent by the user equipment is faster than that sent by the small base station. The cache reports faster, thus improving the effectiveness of flow control in macro base stations.

For example, preferably, when the macro base station includes bearer separation, and there are independent RLC entities on the side of the macro base station and the side of the small base station for the separated bearers, when the transmission configuration information includes the need to transmit or retransmitted PDCP PDU, in step s4, the macro base station may send the PDCP PDU that needs to be transmitted or retransmitted to the RLC entity located in the macro base station according to the transmission configuration information; wherein, the method also Including step s6 (not shown), in step s6, the macro base station sends the PDCP PDU to the user equipment.

Specifically, when the macro base station includes bearer separation, and there are independent RLC entities on the side of the macro base station and the side of the small base station for the separated bearers (that is, in the user plane protocol framework 3C), when the When the transmission configuration information includes PDCP PDUs that need to be transmitted or retransmitted, in step s4, the macro base station sends the PDCP PDUs that need to be transmitted or retransmitted to the The RLC entity of the macro base station; then in step s6, the macro base station directly sends the PDCP PDU to the user equipment.

Fig. 7 shows a flow chart of a method for controlling transmission of user equipment implemented by cooperation of user equipment, macro base station and small base station according to a preferred embodiment of the present invention. Each step of the user equipment 1', the macro base station 2', and the small base station 3' cooperates with each other to implement transmission control on the user equipment; wherein, the user equipment constitutes a corresponding macro base station and a small base station Dual connectivity, where the dual connectivity includes the connection between the macro base station and the user equipment and the connection between the small base station and the user equipment.

Specifically, in step s1', the user equipment determines transmission state information corresponding to a DRB (Data Radio Bearer, data radio bearer) established by the user equipment, wherein the transmission state information includes PDCP state information or DRB data-related status information; in step s2', the user equipment sends the transmission status information to the macro base station; correspondingly, in step s2', the macro base station obtains the information related to the user equipment Corresponding transmission state information, wherein the transmission state information includes PDCP state information or DRB data-related state information; in step s3', the macro base station determines the corresponding to the user equipment according to the transmission state information Transmission configuration information, wherein the transmission configuration information includes PDUs that need to be transmitted or retransmitted; in step s4', the macro base station sends the PDUs that need to be transmitted or retransmitted to the Small base station; correspondingly, in step s4', the small base station obtains the PDU sent by the macro base station that needs to be transmitted or retransmitted; in step s5', the small base station sends the PDU to the user equipment.

Wherein, the steps s1', s2', and s3' are the same or basically the same as the corresponding steps shown in Fig. 6, so they will not be repeated here, and are included here by reference.

Here, the above method can be used in the user plane protocol framework 2A, 2C, 3C or 3D.

The above-mentioned steps are continuously working. Here, those skilled in the art should understand that "continuous" means that the above-mentioned steps respectively transmit status information in real time, or according to the requirements of the set or real-time adjusted working mode. Determine, send and receive transmission status information, determine transmission configuration information, transmit configuration, and send PDUs to user equipment, etc., until the user equipment stops determining the transmission status information corresponding to the DRB established by the user equipment .

In step s4', the macro base station sends the PDUs to be transmitted or retransmitted to the small base station according to the transmission configuration information.

Specifically, here, the PDUs that need to be transmitted or retransmitted include but are not limited to PDCP PDUs (such as in the user plane protocol framework 2C or 3C) and new layer PDUs above PDCP (such as in the user plane protocol framework 2A ). In step s4', the macro base station sends the PDUs that need to be transmitted or retransmitted to the small base station based on various communication protocols according to the transmission configuration information.

Correspondingly, in step s4', the small base station acquires the PDUs sent by the macro base station that need to be transmitted or retransmitted based on various communication protocols. In step s5', the small base station sends the PDU to the user equipment.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned. In addition, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means stated in the device claims may also be realized by one unit or device through software or hardware. The words first, second, etc. are used to denote names and do not imply any particular order.

Claims (15)

1. one kind transmits for carrying out subscriber equipment the method controlled, wherein, described subscriber equipment forms dual link with corresponding macro base station and little base station, described dual link comprises the connection of described macro base station and described subscriber equipment and the connection of described little base station and described subscriber equipment, and the method comprises the following steps:

The transmitting state information corresponding with the DRB that described subscriber equipment is set up determined by subscriber equipment described in a, and wherein, described transmitting state information comprises PDCP state information or DRB data related status information;

Described transmitting state information is sent to described macro base station by subscriber equipment described in b;

Macro base station described in c, according to described transmitting state information, determines the transmission of configuration information corresponding with described subscriber equipment;

Macro base station described in d, according to described transmission of configuration information, carries out transmission configuration to described subscriber equipment.

2. method according to claim 1, wherein, described step a comprises:

The transmitting state information corresponding with the DRB that described subscriber equipment is set up determined by-described subscriber equipment, wherein, described transmitting state information comprises PDCP state information or DRB data related status information, the DRB that the DRB that described subscriber equipment is set up sets up for the described subscriber equipment being unloaded to described little base station.

3. method according to claim 2, wherein, described step a comprises:

-described subscriber equipment is according to preset trigger condition, determine the transmitting state information corresponding with the DRB that described subscriber equipment is set up, wherein, described transmitting state information comprises PDCP state information or DRB data related status information, the DRB that the DRB that described subscriber equipment is set up sets up for the described subscriber equipment being unloaded to described little base station;

Wherein, described preset trigger condition comprises following at least any one:

-by the trigger conditions of described user device configuration;

-by the periodic trigger condition of described user device configuration;

-the trigger conditions that configured by described macro base station;

-the periodic trigger condition that configured by described macro base station.

4. according to the method in any one of claims 1 to 3, wherein, when described transmission of configuration information comprises the PDU of needs transmission or re-transmission, described steps d comprises:

-described macro base station, according to described transmission of configuration information, is sent to described little base station by needing the PDU of transmission or re-transmission;

Wherein, the method also comprises:

Described PDU is sent to described subscriber equipment by-described little base station.

5. according to the method in any one of claims 1 to 3, wherein, be separated when comprising carrying in described macro base station, and for be separated be carried on described macro base station side and described little base station side all have independently RLC entity time,

Wherein, when described transmission of configuration information comprises the PDCP PDU of needs transmission or re-transmission, described steps d comprises:

-described macro base station, according to described transmission of configuration information, is sent to needing the PDCPPDU of transmission or re-transmission the RLC entity being positioned at described macro base station;

Wherein, the method also comprises:

Described PDCP PDU is sent to described subscriber equipment by-described macro base station.

6. according to the method in any one of claims 1 to 3, wherein, when described transmission of configuration information comprises flow control information, described steps d comprises:

-described macro base station, according to described transmission of configuration information, implements flow control to the DRB being unloaded to little base station.

7. one kind is carried out transmitting the macro base station controlled to subscriber equipment for realizing, wherein, described subscriber equipment forms dual link with corresponding macro base station and little base station, described dual link comprises the connection of described macro base station and described subscriber equipment and the connection of described little base station and described subscriber equipment, and this equipment comprises:

Acquisition device, for obtaining the transmitting state information corresponding with described subscriber equipment, wherein, described transmitting state information comprises PDCP state information or DRB data related status information;

Configuration determining device, for according to described transmitting state information, determines the transmission of configuration information corresponding with described subscriber equipment;

Inking device, for according to described transmission of configuration information, carries out transmission configuration to described subscriber equipment.

8. macro base station according to claim 7, wherein, when described transmission of configuration information comprises the PDU of needs transmission or re-transmission, described inking device is used for:

-according to described transmission of configuration information, be sent to described little base station by needing the PDU of transmission or re-transmission.

9. macro base station according to claim 7, wherein, is separated when comprising carrying in described macro base station, and for be separated be carried on described macro base station side and described little base station side all have independently RLC entity time,

Wherein, when described transmission of configuration information comprises the PDCP PDU of needs transmission or re-transmission, described inking device is used for:

-according to described transmission of configuration information, be sent to needing the PDCP PDU of transmission or re-transmission the RLC entity being positioned at described macro base station;

Wherein, this equipment also comprises:

Dispensing device, for being sent to described subscriber equipment by described PDCP PDU.

10. macro base station according to claim 7, wherein, when described transmission of configuration information comprises flow control information, described inking device is used for:

-according to described transmission of configuration information, flow control is implemented to the DRB being unloaded to little base station.

The 11. 1 kinds of subscriber equipmenies transmission of subscriber equipment controlled for auxiliary realization, wherein, described subscriber equipment forms dual link with corresponding macro base station and little base station, described dual link comprises the connection of described macro base station and described subscriber equipment and the connection of described little base station and described subscriber equipment, and this equipment comprises:

State determination device, for the transmitting state information that the DRB determined with described subscriber equipment is set up is corresponding, wherein, described transmitting state information comprises PDCP state information or DRB data related status information;

State dispensing device, for being sent to described macro base station by described transmitting state information.

12. subscriber equipmenies according to claim 11, wherein, described state determination device is used for:

-determine the transmitting state information corresponding with the DRB that described subscriber equipment is set up, wherein, described transmitting state information comprises PDCP state information or DRB data related status information, the DRB that the DRB that described subscriber equipment is set up sets up for the described subscriber equipment being unloaded to described little base station.

13. subscriber equipmenies according to claim 12, wherein, described state determination device is used for:

-described subscriber equipment is according to preset trigger condition, determine the transmitting state information corresponding with the DRB that described subscriber equipment is set up, wherein, described transmitting state information comprises PDCP state information or DRB data related status information, the DRB that the DRB that described subscriber equipment is set up sets up for the described subscriber equipment being unloaded to described little base station;

Wherein, described preset trigger condition comprises following at least any one:

-by the trigger conditions of described user device configuration;

-by the periodic trigger condition of described user device configuration;

-the trigger conditions that configured by described macro base station;

-the periodic trigger condition that configured by described macro base station.

The 14. 1 kinds of little base stations transmission of subscriber equipment controlled for auxiliary realization, wherein, described subscriber equipment forms dual link with corresponding macro base station and little base station, described dual link comprises the connection of described macro base station and described subscriber equipment and the connection of described little base station and described subscriber equipment, and this equipment comprises:

Configuration acquisition device, for obtaining the needs transmission that described macro base station sends or the PDCP PDU retransmitted;

Transmission dispensing device, for being sent to described subscriber equipment by described PDCP PDU.

15. 1 kinds are carried out transmitting the system controlled to subscriber equipment for realizing, wherein, described subscriber equipment forms dual link with corresponding macro base station and little base station, described dual link comprises the connection of described macro base station and described subscriber equipment and the connection of described little base station and described subscriber equipment, and this system comprises the macro base station according to any one of claim 7 to 10, the subscriber equipment according to any one of claim 11 to 13 and little base station as described in claim 14.