WO2018137216A1 - Information transmission method, device and system - Google Patents

Abstract

Disclosed in the embodiments of the present invention are an information transmission method, device and system. The method comprises: an access network device receives from a target network device the continuity requirement of a service, the access network device being used for a first standard network; the access network device determines that the continuity requirement of the service cannot be satisfied if the service is established in the first standard network; the access network device sends first indication information to the target network device, the first indication information being used for indicating that the continuity requirement of the service cannot be satisfied if the service is established in the first standard network. The use of the embodiments of the present invention facilitates improving the stability and the service quality of a service established in a network side.

Description

Information transmission method, device and system Technical field

The present application relates to the field of communications technologies, and in particular, to an information transmission method, device, and system.

Background technique

4th Generation (4G) mobile communication networks, such as Long Term Evolution (LTE) networks, have now achieved wide coverage. 4G network has won the praise of users and operators because of its fast communication speed, wide network spectrum and flexible communication. However, with the emergence of network requirements such as the Internet of Things and the Internet of Vehicles, users are increasingly demanding the next-generation mobile communication network, that is, the 5th Generation (5G) mobile communication network, for example, requiring continuous wide-area coverage of 100 megabytes. User experience rate per second (Mbps), user experience rate of 1 gigabyte per second (Gbps), air interface delay within 1 millisecond (ms), end-to-end delay within 100ms, reliability Guarantee and so on.

In the early stage of commercialization of 4G networks, in practice, it is necessary to ensure interoperability between 4G networks and 2nd Generation (2G) mobile communication networks or 3rd Generation (3G) mobile communication networks to ensure continuity of services. Similarly, in the initial stage of 5G network deployment, it is also necessary to ensure the continuity of services between the 5G network and the 4G network or other networks. However, when the current network is established, the network side does not examine the continuity requirement of the service, that is, whether the current network establishes the service to ensure the continuity of the service, the service tries to establish the current network. .

Summary of the invention

The embodiment of the invention provides an information transmission method, device and system, so as to avoid the problem that the continuity of the service is not investigated when the service is established.

In a first aspect, an embodiment of the present invention provides an information transmission method, where the method includes: a target network device sends a continuity requirement of a service to an access network device, where the access network device is applied to a first standard network; The network device sends the first indication information to the target network device, where the first indication information is used to indicate that the continuity requirement of the service cannot be satisfied if the service is established in the first-standard network.

It can be seen that, in the embodiment of the present invention, the access network device can notify the target network device that the continuity requirement of the service cannot be satisfied, and the target network device is avoided by the notification mechanism of the indication information between the access network device and the target network device. Blindly establishing services on the first-standard network makes the continuity requirements of the service unsatisfactory, which is beneficial to improving the stability and service quality of the services established on the network side.

In a possible design, before the access network device sends the first indication information to the target network device, it may also determine a continuity requirement of the service if the service is established in the first-standard network. Can't be satisfied.

It can be seen that, in the present design, after receiving the continuity requirement of the service, the access network device first determines that if the service is established in the first standard network, the continuity requirement of the service cannot be satisfied, and then Sending the first indication information to the target network device, so as to accurately notify that the continuity requirement of the service of the target network device cannot be met, and avoiding the misdirection of the indication information when the first standard network meets the continuity requirement of the service, which is beneficial to improving the network. The side establishes the stability and accuracy of the business.

In the present design, the access network device determines that the access network device may further determine the first service if the service is not satisfied after the first system network is established. The coverage of a standard network cannot meet the continuity requirements of the service.

In the present design, the access network device determines that the continuity requirement of the service cannot be satisfied if the service is established in the first-standard network, and includes one of the following situations: the access network device determines There is no interface between the mobility management entity of the first-standard network and the mobility management entity of the second-standard network; or the access network device determines that the terminal cannot support the first-standard network and the second standard Dual or dual registration between networks.

In a possible implementation manner, the access network device may determine that there is no interface between the mobility management entity of the first-standard network and the mobility management entity of the second-standard network by: The network access device receives interface indication information from the mobility management entity of the first-standard network, where the interface indication information is used to indicate mobility management of the mobility management entity of the first-standard network and the second-standard network. There is no interface between the entities; the access network device determines, according to the interface indication information, that there is no interface between the mobility management entity of the first-standard network and the mobility management entity of the second-standard network.

In a possible design, the access network device may receive a request message from the target network device by using a core network device, where the request message includes a continuity requirement of the service, and the core network device is applied to the The first system network. Correspondingly, the access network device may send a response message to the target network device by using the core network device, where the response message includes the first indication information. The request message may be used to request to establish a service flow or bearer for the service.

In the present design, the request message may further include second indication information, where the second indication information is used to indicate that the access network device determines that the service is established when the first standard network is established. The first indication information is sent to the target access network device after the continuity requirement cannot be met.

In a possible design, the access network device determines that if the service continuity requirement of the service cannot be satisfied after the first standard network is established, the terminal may also be transferred to the second Standard network.

In a possible design, after the target network device receives the first indication information from the access network device, it may also be determined that the terminal accesses the second standard network, and the service of the service is triggered by the second standard network. Stream or bearer establishment process.

Among them, the second standard network can meet the continuity requirements of the service.

It can be seen from the above that in the present design, the access network device determines that if the continuity requirement of the service cannot be satisfied after the service is established in the first standard network, the access network device transfers the terminal to the second standard network, and the target network device determines The terminal accesses the second-standard network, and triggers the service flow or bearer establishment process of the service in the second-standard network. Since the second-standard network can meet the continuity requirement of the service, the service flow or bearer establishment process that triggers the service in the second-standard network can ensure the continuity of the service, and is beneficial to improving the service quality and stability of the service.

In a possible implementation, the request message may further include third indication information, where the third indication information is used to indicate that the access network device determines that the service is established in the first standard network. Then, the continuity requirement of the service cannot be satisfied, and the terminal is transferred to the second standard network.

In another possible implementation manner, before the access network device transfers the terminal to the second standard network, the access network device may further receive, by using the core network device, the target network device. Four indication information, said The four indication information is used to instruct the access network device to transfer the terminal to the second standard network.

In a possible design, the access network device determines that if the service continuity requirement of the service cannot be satisfied after the service is established in the first mode network, the access network device may also be The service establishes a service flow or bearer.

In the present design, the request message may further include fifth indication information, where the fifth indication information is used to instruct the access network device to determine, if the service is established in the first standard network, the service The continuity requirement cannot be satisfied to establish a service flow or bearer for the service.

In the present design, before the access network device establishes a service flow or a bearer for the service, the access network device may further receive sixth indication information from the target network device by using the core network device, where The sixth indication information is used to indicate that the access network device establishes a service flow or a bearer for the service.

In a possible design, after the target network device receives the first indication information from the access network device, the target network device may also re-trigger the service flow or bearer of the service in the first standard network. The process of establishing.

In a possible design, the first standard network may be a fifth generation 5G network, and the second system network may be a fourth generation 4G network; or the first standard network may be the 4G network, and the second The system network can be the 5G network.

In this design, if the first-standard network is a fifth-generation 5G network, and the second-standard network is a fourth-generation 4G network, the access network device may be a base station in a 5G network, and the core network device It can be an access management function AMF entity or a session management function SMF entity. Or, if the first-standard network is the 4G network, and the second-standard network is the 5G network, the access network device may be an evolved network base station, where the core network device may be a mobility management entity MME.

In one possible design, the target network device may be an application function AF entity, a policy charging function PCF entity, or a policy charging rule function PCRF entity.

In a second aspect, an embodiment of the present invention provides an access network device, where the access network device has a function of implementing an action of an access network device in the foregoing method design. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the access network device includes a processor configured to support the access network device to perform corresponding functions in the methods described above. Further, the access network device may further include a communication interface, where the communication interface is used for communication between the access network device and the target network device, the core network device, or other devices. Further, the access network device can also include a memory for coupling with the processor that retains the necessary program instructions and data for the access network device.

In a third aspect, an embodiment of the present invention provides a target network device, where the target network device has a function of implementing behavior of a target network device in the foregoing method design. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the target network device includes a processor configured to support the target network device to perform a corresponding function of the above methods. Further, the target network device may further include a communication interface for communication between the target network device and the access network device, the core network device, or other devices. further, The target network device can also include a memory for coupling with the processor that retains the program instructions and data necessary for the target network device.

In a fourth aspect, an embodiment of the present invention provides a core network device, where the core network device has a function of implementing behavior of a core network device in the foregoing method design. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the core network device includes a processor configured to support the core network device to perform the corresponding functions of the above methods. Further, the core network device may further include a communication interface for communication between the core network device and the access network device, the target network device, or other devices. Further, the core network device may further include a memory for coupling with the processor, which stores necessary program instructions and data of the core network device.

In a fifth aspect, an embodiment of the present invention provides a communication system, where the system includes the access network device and the target network device, and the system includes the access network device, the core network device, and the foregoing The target network device; or the system includes the access network device, the core network device, the target network device, and the terminal described in the above aspects.

In a sixth aspect, an embodiment of the present invention provides a computer readable storage medium, where the computer readable storage medium stores instructions that, when run on a computer, cause the computer to perform the method described in the first aspect above.

In a seventh aspect, an embodiment of the present invention provides a computer program product comprising instructions that, when run on a computer, cause the computer to perform the method of the first aspect described above.

It can be seen that, in the embodiment of the present invention, the access network device can notify the target network device that the continuity requirement of the service cannot be satisfied, and the target network device is avoided, by using the notification mechanism of the indication information between the access network device and the target network device. Blindly establishing services on the first-standard network makes the continuity requirements of the service unsatisfactory, which is beneficial to improving the stability and service quality of the services established on the network side.

DRAWINGS

1A is a schematic diagram of a possible network architecture provided by an embodiment of the present invention;

FIG. 1B is a schematic diagram of another possible network architecture provided by an embodiment of the present invention; FIG.

2 is a schematic diagram of communication of an information transmission method according to an embodiment of the present invention;

3 is a schematic diagram of communication of another information transmission method according to an embodiment of the present invention;

4A is a schematic block diagram of an access network device according to an embodiment of the present invention;

4B is a schematic structural diagram of an access network device according to an embodiment of the present invention;

FIG. 5A is a schematic block diagram of a target network device according to an embodiment of the present invention; FIG.

FIG. 5B is a schematic structural diagram of a target network device according to an embodiment of the present invention.

detailed description

The following describes some possible application scenarios and network architectures applicable to the embodiments of the present invention in conjunction with FIG. 1A and FIG. 1B.

FIG. 1A shows a possible network architecture provided by an embodiment of the present invention. The network architecture mainly includes 4G network, 5G network and Internet Protocol (IP) Multimedia Subsystem (IMS). The internet.

The above 4G network mainly includes: an evolved Node B (eNB or eNodeB), a Mobility Management Entity (MME), a Serving Gateway (SGW), and a Packet Data Network Gateway (PGW). ) and the Policy and Charging Rules Function (PCRF) entity. The above eNB may also be referred to as an evolved network base station (E-UTRAN NodeB), wherein the full name of the E-UTRAN is called an evolved universal terrestrial radio access network. The terminal can communicate wirelessly with the eNB in the 4G network to access the 4G network.

The network side device of the above 5G network mainly includes: an access network device (for example, a Next Generation Radio Access Network (NG RAN) device), a Control Plane Function (CP Function) entity, and a user. User Plane Function (UPF) entity and Pollicy and Charging Function (PCF) entity. The CP Function entity may include a core network access management function (AMF) entity and a session management function (SMF) entity. The above AMF entity may also be referred to as an access control function entity or a Mobility Management Function (MMF) entity. The terminal can communicate wirelessly with the access network device in the 5G network to access the 5G network.

The foregoing IMS network mainly includes: a Proxy-Call Session Control Function (P-CSCF) entity, an Access Transfer Control Function (ATCF) entity, and an Access Forward Gateway (ATGW). ). The P-CSCF entity and the ATCF entity may be replaced by an Application Function (AF) entity for performing application-level control on the service.

FIG. 1B illustrates another possible network architecture provided by an embodiment of the present invention. The network architecture includes a 4G network, a 5G network, and an IMS network.

The 4G network mainly includes: an eNB, an MME, an SGW, a user plane function entity of the PGW, a control plane function entity of the PGW, and a PCRF. The user plane function entity of the PGW can be described as PGW-U, and the control plane function entity of the PGW can be described as PGW-C. The terminal can communicate wirelessly with the eNB in the 4G network to access the 4G network.

The 5G network mainly includes: an access network device (for example, an NG RAN device), an AMF entity, a UPF entity, an SMF entity, and a PCF entity. The terminal can communicate wirelessly with the access network device in the 5G network to access the 5G network.

It should be noted that the 4G network supports Control Plane (CP) and User Plane (UP) separation. For example, the PGW in the 4G network can be separated into PGW-C and PGW-U. As shown in FIG. 1B, the PGW-U in the 4G network and the UPF entity in the 5G network can be deployed in a unified manner; the PGW-C in the 4G network and the SMF entity in the 5G network can be deployed in one combination; the PCRF in the 4G network and The PCF entities in the 5G network can be deployed in a unified manner.

For a description of the IMS network, reference may be made to the detailed description of the IMS network in FIG. 1A, and details are not described herein.

In the embodiments of the present invention, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning thereof. The terminal involved in the embodiments of the present invention may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to the wireless modem, and various forms. User Equipment (UE), Mobile Station (MS), terminal device, etc. For convenience of description, the devices mentioned above are collectively referred to as terminals. An access network device according to an embodiment of the present invention is a device deployed in a radio access network to provide a wireless communication function for a terminal. For example, the access network device may be a base station (BS), and the base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices with base station functions may be different. For example, in a 5G network, it may be called an NG RAN device or a GNB, etc., in Long Term Evolution (LTE). In the system, it is called eNB or eNodeB, in 3G network, it is called Node B and so on. For convenience of description, in the embodiment of the present invention, the foregoing apparatus for providing a wireless communication function for a terminal is collectively referred to as an access network device.

The embodiments of the present invention will be further described in detail below based on the common aspects of the embodiments of the present invention described above.

In the existing solution, the service to be created by the terminal is generally established on the current network where the terminal is located, and the continuity requirement of the service is not investigated, which is not conducive to ensuring the continuity of the service.

In view of this, an embodiment of the present invention provides an information transmission method, and an apparatus and system based on the method. The method includes: the target network device sends a continuity requirement of the service to the access network device, where the access network device is applied to the first standard network; the access network device sends the first indication information to the target network device, The first indication information is used to indicate that the continuity requirement of the service cannot be satisfied if the service is established in the first-standard network. It can be seen that, by using the notification mechanism of the indication information between the access network device and the target network device, the access network device can notify the target network device that the continuity requirement cannot be satisfied in time, and avoid the target network device blindly establishing the service in the first standard network. The situation that the continuity requirement of the service cannot be satisfied occurs, which is beneficial to improving the stability and service quality of the service established on the network side.

In the solution provided by the embodiment of the present invention, the first standard network may be a 5G network, and the second standard network may be a 4G network, a 3G network, a 2G network, or other networks that may appear in the future; or the first standard network may be a 4G network. , 3G network, 2G network or other networks that may appear in the future, the second system network may be a 5G network. Of course, the solution of the embodiment of the present invention may be applied to other scenarios, which are not limited in the embodiment of the present invention.

The information transmission method provided by the embodiment of the present invention will be described below with reference to FIG. FIG. 2 shows an information transmission method provided by an embodiment of the present invention. The method includes: part 201 and part 202, as follows:

In section 201, the target network device sends a continuity requirement for the service to the access network device, and the access network device is applied to the first standard network.

In one example, the target network device can be an application function entity, a policy charging function entity, or a policy charging rule function entity.

In one example, the target network device can send a continuity requirement for the service to the access network device through the core network device. The core network device is applied to the first standard network. In this case, the target network device first sends the continuity requirement of the service to the core network device, and then the core network device sends the continuity requirement of the service to the access network device.

For example, the target network device sends a request message to the access network device through the core network device, where the request message includes a continuity requirement of the service. The request message is used to request to establish a service flow or bearer for the service. For example, the request message can be a service flow setup request message. It can be understood that the target network device communicates with the core network device. The request message, and the request message transmitted between the core network device and the access network device, may be the same request message or a different request message, which is not limited in the embodiment of the present invention.

In an example, after the access network device receives the continuity requirement of the service from the target access network device, it may also be determined that the continuity requirement of the service cannot be satisfied if the service is established in the first standard network. . It can be seen that, in this example, after receiving the continuity requirement of the service, the access network device can determine that if the service is established in the first-standard network, the continuity requirement of the service cannot be satisfied, thereby Avoiding the continuity requirements of the service is not investigated, which is beneficial to improving the stability and accuracy of establishing services on the network side.

For example, the access network device determines that the continuity requirement of the service cannot be satisfied when the service is established in the first-standard network, and may include one of the following situations: the access network device determines the first format There is no interface between the mobility management entity of the network and the mobility management entity of the second-standard network; or the access network device determines that the terminal cannot support the double between the first-standard network and the second-standard network Connect or double sign up.

In the former case, the access network device may determine that there is no interface between the mobility management entity of the first-standard network and the mobility management entity of the second-standard network: the access network device Receiving interface indication information from a mobility management entity of the first-standard network, where the interface indication information is used to indicate a mobility management entity of the first-standard network and a mobility management entity of the second-standard network An interface does not exist; correspondingly, the access network device may determine, according to the interface indication information, that there is no interface between the mobility management entity of the first standard network and the mobility management entity of the second standard network. . It should be noted that the interface indication information may also be named as another information name, which is not limited in the embodiment of the present invention.

The terminal may be a terminal for performing the service.

In this example, the access network device determines that the access network device may further transfer the terminal to the service after the continuity requirement of the service cannot be satisfied after the first system network is established. The second system network. It can be understood that the implementation of the access network device to transfer the terminal to the second-standard network may be various, which is not limited in the embodiment of the present invention.

For example, the access network device may transfer the terminal to the second standard network. The specific implementation manner may be: the access network device sends a radio resource control connection release message to the terminal to redirect the terminal to The second system network. For example, the access network device may transfer the terminal to the second standard network. The specific implementation manner may be: the access network device instructs the terminal to initiate a network-assisted cell reselection process, so that the terminal reselects To the second system network.

In this example, the access network device determines that the access network device may further determine the first service if the service is not satisfied after the first system network is established. The coverage of a standard network cannot meet the continuity requirements of the service.

In this example, the access network device determines that the access network device may also be the service if the continuity requirement of the service cannot be satisfied after the service is established in the first mode network. Establish a business flow or bearer.

In this example, the request message may further include fifth indication information, where the fifth indication information is used to instruct the access network device to determine, if the service is established in the first-standard network, the service The continuity requirement cannot be satisfied to establish a service flow or bearer for the service.

In this example, before the access network device establishes a service flow or bearer for the service, the access network device further The sixth indication information may be received by the core network device from the target network device, where the sixth indication information is used to indicate that the access network device establishes a service flow or a bearer for the service.

In the section 202, the access network device sends first indication information to the target network device, where the first indication information is used to indicate that the service is continuous if the service is established in the first standard network. Sexual requirements cannot be met.

In an example, the access network device may send the first indication information to the target network device by using the core network device. In this case, the access network device first sends the first indication information to the core network device, and then the core network device sends the first indication information to the access network device.

For example, the access network device sends a response message to the target network through the core network device, and the response message includes the first indication information. For example, the response message can create a response message for the traffic flow. It can be understood that the response message transmitted between the access network device and the core network device, and the response message transmitted between the core network device and the target network device, may be the same response message or different response messages. The embodiments of the present invention are not limited.

In an example, the request message may further include second indication information, where the second indication information is used to indicate that the access network device determines the service to be established in the first-standard network. The first indication information is sent to the target access network device after the continuity requirement cannot be met.

In an example, after the target network device receives the first indication information from the access network device, the target network device may further determine that the terminal accesses the second-standard network, and the second-standard network triggers the The business flow or bearer establishment process of the business. Among them, the second standard network can meet the continuity requirements of the service. As can be seen from the above, in the example, the access network device determines that if the service continuity requirement cannot be satisfied after the service is established in the first mode network, the access network device transfers the terminal to the second standard network, and the target network device determines The terminal accesses the second-standard network, and triggers the service flow or bearer establishment process of the service in the second-standard network. Since the second-standard network can meet the continuity requirement of the service, the service flow or bearer establishment process that triggers the service in the second-standard network can ensure the continuity of the service, and is beneficial to improving the service quality and stability of the service.

In this example, the request message may further include third indication information, where the third indication information is used to instruct the access network device to determine, if the service is established in the first-standard network, the service The continuity requirement of the continuity cannot be satisfied after the terminal is transferred to the second standard network.

In this example, before the access network device transfers the terminal to the second standard network, the access network device may further receive fourth indication information from the target network device by using the core network device. The fourth indication information is used to instruct the access network device to transfer the terminal to the second standard network.

In an example, after the target network device receives the first indication information from the access network device, the target network device may also re-trigger the establishment of the service flow or bearer of the service in the first-standard network. Process.

In an example, the first-standard network may be a fifth-generation 5G network, and the second-standard network may be a fourth-generation 4G network; or the first-standard network may be the 4G network, the second-standard network It can be the 5G network.

In this example, if the first-standard network is a fifth-generation 5G network and the second-standard network is a fourth-generation 4G network, the access network device may be a base station in a 5G network (for example, may be represented as a GNB) The core network device may be an access management function entity or a session management function entity; or, if the first system network is the 4G network and the second system network is the 5G network, the access The network device may be an evolved network base station, and the core network device may be a mobility management entity.

It can be seen that, in the information transmission method provided by the embodiment of the present invention, the access network device can notify the target network device that the continuity requirement of the target network device service cannot be satisfied by the notification mechanism of the indication information between the access network device and the target network device. The situation that the target network device is blindly established in the first-standard network and the continuity requirement of the service cannot be satisfied is avoided, which is beneficial to improving the stability and service quality of the service established on the network side.

The embodiments of the present invention are further described below in conjunction with specific application scenarios. In the solution shown in FIG. 3, an embodiment of the present invention is described by taking a first-standard network as a 5G network and a second-standard network as a 4G network as an example. The request message is a service flow establishment request message, and the response message is a service flow establishment response message. The terminal is initially attached to the 5G network, and the service to be initiated by the terminal is an A service (for example, a voice call service), and the 5G network cannot be satisfied by default. The business continuity requirements of the mobile terminal, the 4G network can guarantee the continuity requirement of the A service. The information transmission method shown in FIG. 3 may include the following parts:

In Section 301, the AF entity detects the establishment request of the A service.

The request for establishing the A service may be initiated by the terminal to the AF entity, for example, the terminal initiates a call service establishment request, or may be initiated by the AF entity to the terminal, such as initiating a called voice service to the terminal. .

In section 302, the AF entity sends a first message to a PCF entity of the 5G network, the first message including a continuity requirement of the A service.

In Section 303, the PCF entity sends a second message to the SMF entity of the 5G network, the second message including a continuity requirement for the A service.

In section 304, the SMF entity sends a third message to the GNB, the third message including a continuity requirement for the A service.

The specific naming of the first message, the second message, and the third message is not limited, and may be the same or different.

In one possible example, the SMF entity sends a third message to the GNB, including:

Sending, by the SMF entity, a third message to an AMF entity or an MMF entity;

The AMF entity sends the third message to the GNB.

The third message may be, for example, a quality of service (QoS) QoS flow setup request, or may be a bearer setup request.

In section 305, the GNB determines that if the A service is established in a 5G network, the continuity requirement of the A service cannot be satisfied.

In a possible example, the GNB determines that if the A service is established in a 5G network, the specific implementation manner in which the continuity requirement of the A service cannot be satisfied may be:

The GNB determines that there is no handover interface between the AMF entity and the mobility management entity MME of the 4G network, and the handover interface may be an Nx interface, where the AMF entity is connected to the GNB.

It can be understood that the specific implementation manner in which the GNB determines that there is no switching interface between the AMF entity and the MME of the 4G network may be various, which is not limited by the embodiment of the present invention.

For example, the specific implementation manner that the GNB determines that there is no handover interface between the AMF entity and the MME of the 4G network may be: the GNB receives the notification information sent by the AMF entity through the N2 interface of the GNB. And the notification information is used to indicate that there is no Nx interface between the AMF entity and the MME of the 4G network, and determining There is no handover interface between the AMF entity and the MME of the 4G network.

For example, the GNB determines that the AMF entity does not have a handover interface between the MME and the MME of the 4G network, and the GNB determines that the third message is sent by the AMF entity. There is notification information, and the notification information is that there is no Nx interface between the AMF entity and the MME of the 4G network, and it is determined that there is no handover interface between the AMF entity and the MME of the 4G network.

In another possible example, the GNB determines that if the A service is established in a 5G network, the specific implementation requirement that the continuity requirement of the A service cannot be satisfied may also be:

The GNB determines that the terminal does not support dual radio or dual registration on a 5G network and a 4G network.

The dual connection between the 5G network and the 4G network of the terminal means that the terminal can access two networks at the same time, and the dual antenna of the terminal can implement dual-receiving dual-issue functions in two networks; The dual registration of the 5G network and the 4G network means that the terminal can be simultaneously registered in two networks, and the core information of the 5G and 4G simultaneously stores the context information of the terminal.

In a possible example, the terminal may inform the GNB whether to support dual radio or dual registration on the 5G network and the 4G network when reporting the capability information to the GNB.

When the GNB determines that one or both of the above conditions are met, it can be determined that if the A service is established in the 5G network, the continuity requirement of the A service cannot be satisfied.

In 306, the GNB sends a service flow setup response message to the SMF entity, where the service flow setup response message carries indication information, where the indication information is used to indicate that if the A service is established on the 5G network, the service A The continuity requirements cannot be met.

In Section 307, the SMF entity sends the indication information to the PCF entity.

In 308, the PCF entity sends the indication information to the AF entity.

In a possible example, the GNB sends a service flow setup response message to the SMF entity, including:

Sending, by the GNB, a service flow establishment response message to the AMF entity;

The AMF entity sends the service flow setup response message to the SMF entity.

In the 309 part, after receiving the indication information, the AF entity sends a feedback message to the GNB via the PCF entity and the SMF entity, where the feedback message includes indication information indicating that the GNB transfers the terminal to the 4G network.

In section 310, the GNB transfers the terminal to the 4G network.

It should be noted that this part may be directly performed by the GNB after the execution part 304, may be performed after the execution part 306, or may be performed after the receiving part 309.

It can be understood that the specific implementation manner in which the GNB transfers the terminal to the 4G network may be various, which is not limited by the embodiment of the present invention.

For example, the specific implementation manner that the GNB transfers the terminal to the 4G network may be: the GNB sends a radio resource control connection release (eg, RRC connection release) message to the terminal to redirect the terminal to the 4G network.

For example, the specific implementation manner in which the GNB transfers the terminal to the 4G network may be: the GNB instructs the terminal to initiate a Network Assisted Cell Change (NCAA) process, so that the terminal is heavy. Selected to the 4G network.

In Section 311, after the terminal accesses the 4G network, an Attach or Tracking Area Update (TAU) process is performed.

The AF entity and the PCRF entity can learn that the terminal accesses the 4G network.

In 312, the AF entity and the PCRF entity trigger a dedicated bearer establishment process of the A service in the 4G network.

The foregoing describes the solution of the embodiment of the present invention mainly from the perspective of interaction between the network elements. It can be understood that each network element, such as an access network device, a target network device, a core network device, etc., in order to implement the above functions, includes corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art will readily appreciate that the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm portions of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The embodiments of the present invention may perform functional unit division on an access network device, a target network device, a core network device, and the like according to the foregoing method. For example, each functional unit may be divided according to each function, or two or more The functions are integrated in one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.

In the case of employing an integrated unit, FIG. 4A shows a possible structural diagram of the access network device involved in the above embodiment. The access network device 400 includes a processing unit 402 and a communication unit 403. The processing unit 402 is configured to control and manage the action of the access network device. For example, the processing unit 402 is configured to support the access network device to perform the process 202 in FIG. 2, the processes S305, S306, S310 and/or in FIG. Other processes of the techniques described herein. The communication unit 403 is configured to support communication between the access network device and the target network device, the core network device, or other devices. The access network device may further include a storage unit 401 for storing program codes and data of the access network device.

The processing unit 402 can be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication unit 403 can be a communication interface, a transceiver, a transceiver circuit, etc., wherein the communication interface is a collective name and can include one or more interfaces. The storage unit 401 can be a memory.

When the processing unit 402 is a processor, the communication unit 403 is a communication interface, and the storage unit 401 is a memory, the access network device according to the embodiment of the present invention may be the access network device shown in FIG. 4B.

Referring to FIG. 4B, the access network device 410 includes a processor 412, a communication interface 413, and a memory 411. Alternatively, the access network device 410 may also include a bus 414. The communication interface 413, the processor 412, and the memory 411 may be connected to each other through a bus 414. The bus 414 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (Extended Industry Standard Architecture). Referred to as EISA) bus. The bus 414 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 4B, but it does not mean that there is only one bus or one type of bus.

The access network device shown in FIG. 4A or FIG. 4B can also be understood as a device for accessing the network device, which is not limited in the embodiment of the present invention.

In the case of employing an integrated unit, FIG. 5A shows a possible structural diagram of the target network device involved in the above embodiment. The target network device 500 includes a processing unit 502 and a communication unit 503. The processing unit 502 is configured to perform control management on the action of the target network device. For example, the processing unit 502 is configured to support the target network device to perform the process S201 in FIG. 2, and the processes S301, S302, S303, S308, S309, and S312 in FIG. And/or other processes for the techniques described herein. The communication unit 503 is configured to support communication between the target network device and the access network device, the core network device, or other devices. The target network device may further include a storage unit 501 for storing program codes and data of the target network device.

The processing unit 502 can be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication unit 503 can be a communication interface, a transceiver, a transceiver circuit, etc., wherein the communication interface is a collective name and can include one or more interfaces. The storage unit 501 can be a memory.

When the processing unit 502 is a processor, the communication unit 503 is a communication interface, and the storage unit 501 is a memory, the target network device according to the embodiment of the present invention may be the target network device shown in FIG. 5B.

Referring to FIG. 5B, the target network device 510 includes a processor 512, a communication interface 513, and a memory 511. Optionally, the target network device 510 may also include a bus 514. The communication interface 513, the processor 512, and the memory 511 may be connected to each other through a bus 514. The bus 514 may be a PCI bus or an EISA bus. The bus 514 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 5B, but it does not mean that there is only one bus or one type of bus.

The target network device shown in FIG. 5A or FIG. 5B can also be understood as a device for the target network device, which is not limited in the embodiment of the present invention.

In addition, the embodiment of the present invention also provides a device for a core network device, and the structure of the core network device is similar to the structure of the foregoing access network device or the foregoing network device, which is not described in detail in the embodiment of the present invention.

The steps of the method or algorithm described in the embodiments of the present invention may be implemented in a hardware manner, or may be implemented by a processor executing software instructions. The software instructions may be composed of corresponding software modules, which may be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an erasable programmable read only memory ( Erasable Programmable ROM (EPROM), electrically erasable programmable read only memory (EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in an access network device, a target network device, or a core network device. Of course, the processor and the storage medium It can also exist as a discrete component in an access network device, a target network device, or a core network device.

Those skilled in the art should appreciate that in one or more of the above examples, the functions described in the embodiments of the present invention may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium (for example, a solid state disk (SSD)). )Wait.

The specific embodiments of the present invention have been described in detail with reference to the embodiments of the embodiments of the present invention. The scope of the present invention is defined by the scope of the present invention. Any modifications, equivalents, improvements, etc., which are included in the embodiments of the present invention, are included in the scope of the present invention.

Claims (29)

An information transmission method, comprising: The access network device receives a continuity requirement of the service from the target network device, where the access network device is applied to the first standard network; The access network device determines that the continuity requirement of the service cannot be satisfied if the service is established in the first standard network; The access network device sends first indication information to the target network device, where the first indication information is used to indicate that if the service is established in the first standard network, the continuity requirement of the service cannot be Satisfy. The method according to claim 1, wherein the access network device determines that the continuity requirement of the service cannot be satisfied if the service is established in the first-standard network, including one of the following situations: : The access network device determines that there is no interface between the mobility management entity of the first-standard network and the mobility management entity of the second-standard network; or The access network device determines that the terminal cannot support dual connectivity or dual registration between the first standard network and the second standard network. The method according to claim 2, wherein the access network device determines that there is no interface between the mobility management entity of the first-standard network and the mobility management entity of the second-standard network, including: The access network device receives the interface indication information from the mobility management entity of the first-standard network, where the interface indication information is used to indicate the mobility management entity of the first-standard network and the second-standard network. There is no interface between the mobility management entities; The access network device determines, according to the interface indication information, that there is no interface between the mobility management entity of the first-standard network and the mobility management entity of the second-standard network. Method according to claim 2 or 3, characterized in that The access network device receives the continuity requirement of the service from the target network device, including: The access network device receives a request message from the target network device by using a core network device, where the request message is used to request to establish a service flow or a bearer for the service, where the request message includes a continuity requirement of the service, The core network device is applied to the first standard network; Sending, by the access network device, the first indication information to the target network device, including: The access network device sends a response message to the target network device by using the core network device, where the response message includes the first indication information. The method according to claim 4, wherein the request message further includes second indication information, the second indication information is used to indicate that the access network device determines that the service is in the first format After the network is established, the continuity requirement of the service cannot be satisfied, and the first indication information is sent to the target access network device. The method according to claim 4 or 5, wherein the access network device determines that if the service continuity requirement of the service cannot be satisfied after the first system network is established, The method also includes: The access network device transfers the terminal to the second standard network. The method according to claim 6, wherein the request message further comprises third indication information, The third indication information is used to indicate that the access network device determines to transfer the terminal to the second after the continuity requirement of the service cannot be satisfied if the service is established in the first standard network. Standard network. The method according to claim 6, wherein the method further comprises: before the access network device transfers the terminal to the second standard network, the method further comprises: The access network device receives fourth indication information from the target network device by using the core network device, where the fourth indication information is used to instruct the access network device to transfer the terminal to the second standard The internet. An information transmission method, comprising: The target network device sends a continuity requirement of the service to the access network device, where the access network device is applied to the first standard network; The target network device receives the first indication information from the access network device, where the first indication information is used to indicate that if the service is established in the first-standard network, the continuity requirement of the service cannot be Satisfy. The method of claim 9 wherein: The requirement that the target network device sends a service continuity to the access network device includes: The target network device sends a request message to the access network device by using the core network device, where the request message is used to request to establish a service flow or a bearer for the service, where the request message includes a continuity requirement of the service, The core network device is applied to the first standard network; The receiving, by the target network device, the first indication information from the access network device, including: The target network device receives a response message from the access network device by using the core network device, where the response message includes the first indication information. The method according to claim 10, wherein the request message further includes second indication information, the second indication information is used to instruct the access network device to determine if the service is in the first format After the network is established, and the continuity requirement of the service cannot be satisfied, the first indication information is sent to the target network device. The method according to claim 10 or 11, wherein the request message further includes third indication information, the third indication information is used to instruct the access network device to determine if the service is in the After the one-standard network is established, the continuity requirement of the service cannot be satisfied, and the terminal is transferred to the second-standard network. The method according to any one of claims 9 to 11, wherein after the target network device receives the first indication information from the access network device, the method further includes: The target network device sends the fourth indication information to the access network device by using the core network device, where the fourth indication information is used to instruct the access network device to transfer the terminal to the second standard network. The method according to any one of claims 9 to 11, wherein after the target network device receives the first indication information from the access network device, the method further includes: The target network device determines that the terminal accesses the second-standard network, and triggers the establishment process of the service flow or bearer of the service in the second-standard network. An access network device, comprising: a processing unit and a communication unit, The processing unit is configured to receive, by the communication unit, a continuity requirement of a service from a target network device, where Applying the access network device to the first-standard network; and for determining that the continuity requirement of the service cannot be satisfied if the service is established in the first-standard network; and for using the communication unit The target network device sends the first indication information, where the first indication information is used to indicate that the continuity requirement of the service cannot be satisfied if the service is established in the first-standard network. The access network device according to claim 15, wherein the processing unit is specifically configured to: determine that there is no non-existence between the mobility management entity of the first-standard network and the mobility management entity of the second-standard network The interface; or, determining that the terminal is unable to support dual connectivity or dual registration between the first standard network and the second standard network. The access network device according to claim 16, wherein the processing unit is specifically configured to: receive, by the communication unit, interface indication information from a mobility management entity of the first standard network, where the interface indication The information is used to indicate that there is no interface between the mobility management entity of the first-standard network and the mobility management entity of the second-standard network; and configured to determine, according to the interface indication information, the first-standard network There is no interface between the mobility management entity and the mobility management entity of the second standard network. The access network device according to claim 16 or 17, wherein the processing unit is configured to: receive, by the communication unit, a request message from the target network device by using a core network device, where the request message is used And requesting to establish a service flow or a bearer for the service, where the request message includes a continuity requirement of the service, where the core network device is applied to the first standard network, and specifically: used by the communication unit The core network device sends a response message to the target network device, where the response message includes the first indication information. The access network device according to claim 18, wherein the request message further includes second indication information, where the second indication information is used to indicate that the access network device determines that the service is in the After the first standard network is established, the continuity requirement of the service cannot be satisfied, and the first indication information is sent to the target access network device. The access network device according to claim 18 or 19, wherein the processing unit determines that if the service continuity requirement of the service cannot be satisfied after the first system network is established, Used to transfer a terminal to the second system network. The access network device according to claim 20, wherein the request message further includes third indication information, where the third indication information is used to indicate that the access network device determines that the service is in the After the first-standard network is established, the continuity requirement of the service cannot be satisfied, and the terminal is transferred to the second-standard network. The access network device according to claim 20, wherein the processing unit is further configured to pass the target unit from the target through the communication unit before transferring the terminal to the second standard network. The network device receives the fourth indication information, where the fourth indication information is used to instruct the access network device to transfer the terminal to the second standard network. A target network device, comprising: a processing unit and a communication unit, The processing unit is configured to send, by the communication unit, a continuity requirement of a service to an access network device, the access network device is applied to a first standard network; and configured to use the access unit from the access network The device receives the first indication information, where the first indication information is used to indicate that the continuity requirement of the service cannot be satisfied if the service is established in the first-standard network. The target network device according to claim 23, wherein the processing unit is specifically configured to: Transmitting, by the communication unit, a request message to the access network device by using a core network device, where the request message is used to request to establish a service flow or a bearer for the service, where the request message includes a continuity requirement of the service, The core network device is applied to the first standard network; and is specifically configured to: receive, by the communication unit, a response message from the access network device by using the core network device, where the response message includes the first Instructions. The target network device according to claim 24, wherein the request message further includes second indication information, where the second indication information is used to instruct the access network device to determine that the service is in the first After the one-standard network is established, and the continuity requirement of the service cannot be satisfied, the first indication information is sent to the target network device. The target network device according to claim 24 or 25, wherein the request message further includes third indication information, where the third indication information is used to indicate that the access network device determines that the service is in the After the first-standard network is established, and the continuity requirement of the service cannot be satisfied, the terminal is transferred to the second-standard network. The target network device according to any one of claims 23 to 25, wherein the processing unit is further configured to pass the communication after receiving the first indication information from the access network device by the communication unit. The unit sends the fourth indication information to the access network device by using the core network device, where the fourth indication information is used to instruct the access network device to transfer the terminal to the second standard network. The target network device according to any one of claims 23 to 25, wherein the processing unit is further configured to determine terminal access after receiving the first indication information from the access network device by using the communication unit. a second-standard network, and triggering a process of establishing a service flow or a bearer of the service in the second-standard network. A communication system, characterized in that the system comprises the access network device according to any one of claims 15 to 22 and the target network device according to any one of claims 23 to 28; The system comprises an access network device according to any one of claims 15 to 22, a target network device according to any one of claims 23 to 28, and a core network device.

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