Wireless communication method, terminal device, and core network device

Abstract

Provided are a wireless communication method, a terminal device, and a core network device. The method comprises: a first terminal device receives a first message sent by a first network element of a core network, wherein the first message comprises first strategy information, and the first strategy information is used for indicating access network information corresponding to one or more services. In the embodiments of the present application, a terminal device can shunt the service on the basis of the first strategy information, so that the service coverage and continuity can be ensured.

Description

Wireless communication method, terminal device and core network device Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment, and core network equipment. Background Art

[0002] In some scenarios, a terminal device needs to access multiple 3rd Generation Partnership Project (3GPP) networks simultaneously to ensure service continuity. To support multiple access technologies, a dual registration mechanism has been introduced. However, this dual registration and the corresponding handover mechanism can only be implemented in specific scenarios and are not applicable to a wide range of terminal device applications.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method, terminal equipment, and core network equipment. The following introduces various aspects involved in the present application.

[0005] In a first aspect, a wireless communication method is provided, including: a first terminal device receives a first message sent by a first network element of a core network, the first message includes first policy information, and the first policy information is used to indicate access network information corresponding to one or more services.

[0006] In a second aspect, a wireless communication method is provided, including: a first network element of a core network sends a first message to a first terminal device, the first message includes first policy information, and the first policy information is used to indicate access network information corresponding to one or more services.

[0007] According to a third aspect, a wireless communication method is provided, including: a second network element of a core network receives a fourth message sent by a first network element of the core network, wherein the fourth message is used to request first policy information of a first terminal device, and the first policy information is used to indicate access network information corresponding to one or more services.

[0008] In a fourth aspect, a terminal device is provided, which includes a first terminal device, and the terminal device includes: a receiving unit, used to receive a first message sent by a first network element of a core network, the first message containing first policy information, and the first policy information is used to indicate access network information corresponding to one or more services.

[0009] In the fifth aspect, a core network device is provided, which is the first network element of the core network, and the core network device includes: a first sending unit, used to send a first message to a first terminal device, the first message includes first policy information, and the first policy information is used to indicate the access network information corresponding to one or more services.

[0010] In the sixth aspect, a core network device is provided, which is the second network element of the core network, and the core network device includes: a first receiving unit, used to receive a fourth message sent by the first network element of the core network, and the fourth message is used to request first policy information of the first terminal device, and the first policy information is used to indicate the access network information corresponding to one or more services.

[0011] In the seventh aspect, a terminal device is provided, comprising a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0012] In the eighth aspect, a core network device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect or the third aspect.

[0013] In a ninth aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or core network device. In another possible design, the system may also include other devices that interact with the terminal device or core network device in the solution provided in the embodiment of the present application.

[0014] In the tenth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a communication device (for example, a terminal device or a core network device) to execute some or all of the steps in the methods of the above aspects.

[0015] In an eleventh aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a communication device (e.g., a terminal device or a core network device) to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0016] In the twelfth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0017] In an embodiment of the present application, a first terminal device may receive a first message sent by a first network element of a core network, so as to determine access network information corresponding to one or more services based on first policy information in the first message. Thus, when the first terminal device simultaneously accesses multiple access networks, different services may be diverted to different access networks based on the first policy information, thereby facilitating service diversion across multiple access technologies and better ensuring service continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a diagram illustrating an example of a system architecture of a wireless communication system to which an embodiment of the present application may be applied.

[0019] FIG2 is a system architecture diagram of a fifth generation (5G) communication system.

[0020] FIG3 is a schematic diagram of the dual registration process.

[0021] FIG4 is a flow chart of a wireless communication method according to an embodiment of the present application.

[0022] FIG5 is a flowchart of a possible implementation of the method shown in FIG4 .

[0023] FIG6 is a flowchart of another possible implementation of the method shown in FIG4 .

[0024] FIG7 is a schematic diagram of the structure of the terminal device provided in an embodiment of the present application.

[0025] FIG8 is a schematic structural diagram of a core network device provided in an embodiment of the present application.

[0026] FIG9 is a schematic structural diagram of another core network device provided in an embodiment of the present application.

[0027] FIG10 is a schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] The technical solution in this application will be described below with reference to the accompanying drawings.

[0029] Wireless communication system

[0030] Figure 1 is a diagram illustrating an example of the system architecture of a wireless communication system 100 to which an embodiment of the present application may be applied. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide network coverage for a specific geographical area and may communicate with the terminal device 120 located within the coverage area. The terminal device 120 may access a network (e.g., a wireless network) through the network device 110. Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0031] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0032] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects, and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the terminal device can be used to act as a base station. For example, the terminal device can act as a scheduling entity that provides sidelink signals between terminal devices in vehicle to everything (V2X) or device to device (D2D). For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through a base station.

[0033] The network device in the embodiment of the present application may be a device for communicating with a terminal device. The network device may be, for example, an access network device or a wireless access network device. For example, the network device may be a base station. The base station may broadly cover the following various names, or be replaced with the following names: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmitting point (TP), home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station may be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof.

[0034] Terminal devices can communicate with each other via sidelinks. Sidelink communication can also be called proximity services (ProSe) communication, unilateral communication, sidelink communication, or D2D communication.

[0035] 5G network system architecture

[0036] Figure 2 is a system architecture diagram of a 5G network applicable to an embodiment of the present application. As shown in Figure 2, the 5G system or NR network architecture released by the 3GPP standard group includes: a terminal device (also known as a UE) 201, an access network device 202 supporting 3GPP technology (including a radio access network (RAN) or access network (AN)), an access and mobility management function (AMF) network element 203, a session management function (SMF) network element 204, a user plane function (UPF) network element 205, a policy control function (PCF) network element 206, an application function (AF) network element 209, a data network (DN) 208, a network slice selection function (NSSF) 211, an authentication server function (AUSF) 210, and a unified data management function (UDM) 207.

[0037] It should be noted that the network architecture shown in Figure 2 does not constitute a limitation on the 5G network architecture. In specific implementations, the 5G network architecture may include more or fewer network elements than shown, or may combine certain network elements. In addition, in Figure 2, the AN or RAN is represented in the form of (R)AN.

[0038] The terminal device 201 can be any terminal device in FIG1 , and will not be described in detail here.

[0039] The access network device 202 is an access device that the terminal device uses to access the network architecture wirelessly. It is mainly responsible for radio resource management, quality of service (QoS) management, data compression and encryption, etc. on the air interface side. For example: NodeB, eNodeB, base station in 5G mobile communication system or NR communication system, base station in future mobile communication system, etc.

[0040] UPF network element 205, AMF network element 203, SMF network element 204, and PCF network element 206 are network elements of the 3GPP core network (referred to as core network elements). UPF network element 205 can be called a user plane function network element, which is mainly responsible for the transmission of user data. Other network elements can be called control plane function network elements, which are mainly responsible for authentication, authorization, registration management, session management, mobility management, and policy control to ensure reliable and stable transmission of user data.

[0041] The UPF network element 205 (or simply "UPF") can be used to forward and receive data from the terminal. For example, the UPF network element can receive service data from the data network and transmit it to the terminal through the access network device. The UPF network element can also receive user data from the terminal through the access network device and forward it to the data network. The transmission resources allocated and scheduled by the UPF network element for the terminal are managed and controlled by the SMF network element. The bearer between the terminal and the UPF network element may include: a user plane connection between the UPF network element and the access network device, and a channel established between the access network device and the terminal. The user plane connection is a quality of service (QoS) flow that can be established between the UPF network element and the access network device to transmit data.

[0042] The AMF network element 203 (or "AMF" for short) can be used to manage terminal access to the core network, such as terminal location update, network registration, access control, terminal mobility management, terminal attachment and detachment, etc. The AMF network element can also provide control plane storage resources for the session when providing services for the terminal session to store the session identifier, the SMF network element identifier associated with the session identifier, etc.

[0043] The SMF network element 204 (or "SMF" for short) can be used to select a user plane network element for the terminal, redirect the user plane network element for the terminal, allocate an Internet Protocol (IP) address to the terminal, establish a bearer (also called a session) between the terminal and the UPF network element, modify and release the session, and control QoS.

[0044] The PCF network element 206 (or simply "PCF") is used to provide policies, such as QoS policy and slice selection policy, to the AMF network element 203 and the SMF network element 204. The PCF is responsible for formulating policies related to mobility management, session management, and billing for terminal devices.

[0045] The AF network element 209 (or simply "AF") is used to interact with the 3GPP core network elements to support application-affected data routing, access network exposure functions, and interact with the PCF network elements for policy control.

[0046] DN 208 can provide data services to users on networks such as IP Multimedia Service (IMS) and the Internet. DN 208 can contain multiple application servers (ASs) that provide different application services, such as carrier services, Internet access, or third-party services. Application servers can implement the functions of AF network elements.

[0047] NSSF 211 is used for network slice selection and supports the following functions: selecting a set of network slice instances to serve the UE; determining the allowed network slice selection assistance information (NSSAI) and, when necessary, determining the mapping to the contracted single-network slice selection assistance information (S-NSSAI); determining the configured NSSAI and, when necessary, determining the mapping to the contracted S-NSSAI; determining the set of AMFs that may be used to query the UE, or determining a list of candidate AMFs based on the configuration.

[0048] AUSF 210 is used to receive the request from AMF 203 to authenticate the terminal, request a key from UDM 207, and then forward the issued key to AMF 203 for authentication processing.

[0049] UDM 207 includes functions such as generation and storage of user contract data, management of authentication data, and supports interaction with external third-party servers.

[0050] As shown in Figure 2, a terminal device establishes an access layer connection with the AN via the Uu interface, exchanging access layer messages and wireless data transmission. The terminal device also establishes a non-access stratum (NAS) connection with the AMF network element via the N1 interface, exchanging NAS messages. In addition to managing terminal device mobility, the AMF network element is also responsible for forwarding session management-related messages between the terminal device and the SMF network element. The UPF network element communicates with the external data network via the N6 interface and with the AN via the N3 interface.

[0051] It should be understood that each network element in Figure 2 can be a network element in a hardware device, a software function running on dedicated hardware, or a virtualized function instantiated on a platform (e.g., a cloud platform). It should be noted that the network architecture shown in the above figure is only an example of the network elements included in the entire network architecture. In the embodiments of the present application, the network elements included in the entire network architecture are not limited.

[0052] Dual Registration

[0053] To ensure service coverage and continuity, increase capacity, and other requirements, a terminal device may need to access multiple 3GPP networks simultaneously and perform traffic switching and traffic diversion between the two access networks. For example, a terminal device can access both a 4G network and a 5G network simultaneously. For example, a terminal device can access two 5G networks of public land mobile networks (PLMNs) simultaneously.

[0054] Taking the example of a terminal device accessing two networks at the same time, the basic requirement in this scenario is to allow the terminal device to register in the two access networks at the same time and maintain a dual registration state.

[0055] To implement dual registration, 5G and LTE system compatibility technologies provide support. Specifically, a single terminal device can be registered in both 5G and LTE access networks simultaneously, allowing for mobility-induced network switching. The dual registration process is schematically illustrated below with reference to Figure 3.

[0056] Figure 3 illustrates the interaction between multiple devices. In addition to some of the devices shown in Figure 2, these devices also include the evolved UMTS terrestrial radio access network (E-UTRAN), the next generation RAN (NG-RAN), the evolved packet core (EPC), the packet data network gateway-control plane (PGW-C), and the home subscriber server (HSS).

[0057] Referring to Figure 3, in step S301, the UE attaches and registers to the EPC (LTE) access network. The EPC assigns the UE a 4G globally unique temporary UE identity (GUTI), or 4G-GUTI. This is a temporary UE ID assigned by the MME and can be used to identify the MME and UE.

[0058] In step S302, the UE sends a registration request to the NG-RAN.

[0059] In step S303, the NG-RAN performs AMF selection.

[0060] In step S304, the NG-RAN sends a registration request to the new AMF.

[0061] In step S305, a registration procedure is performed.

[0062] Through steps S302 to S305, the UE accesses the 5G network and sends a registration request to the 5G core network. The UE uses the 5G-GUTI converted from the 4G-GUTI as its temporary identifier and reports it to the 5G core network.

[0063] In step S306, the AMF registers the UE information with the UDM+HSS and notifies the network element not to cancel the UE's LTE registration. The UE's LTE registration is implemented through the MME.

[0064] Through steps S307 to S309, the UE completes the registration process on the 5G access network. In step S380, the UE receives the registration accept message sent by the new AMF; in step S390, the UE sends a registration complete message to the AMF.

[0065] In step S310, the UE requests a protocol data unit (PDU) session establishment procedure (UE requested PDU session establishment procedure) to establish a PDU session (5G access network).

[0066] In step S311, the PGW-C+SMF network element initiates release of transferred packet data network (PDN) connection to release the PDN connection (LTE access network).

[0067] As can be seen above, the process shown in Figure 3 applies to dual registration mode for a single UE. Furthermore, the core network requires the UE to report associated access network information during registration in order to interact with other network elements. For example, the GUTI information reported by the UE can include information about the MME. The network element receiving the registration information, when interacting with the unified management network element (UDM+HSS), can simultaneously obtain information about both access networks.

[0068] In addition, the same SMF / PGW-C network element can be used in step S310. This session control network element can assign the same IP address to the two connected sessions based on the association between the two access networks, ensuring service continuity. This technology relies on the same UE and the GUTI information being associated between the two access networks, which requires that the two access networks be operated by the same operator.

[0069] In some embodiments, in order to reduce the impact on the existing network, some operators recommend using two subscriber identity modules (SIM) cards to access two networks, which can also be regarded as two associated UEs accessing the two networks simultaneously.

[0070] For example, with the introduction of Multi-USIM (Multi-Universal Subscriber Identity Module) technology, a single mobile terminal can be equipped with multiple (usually two) USIM cards. The two USIM cards can independently register with the access network, establish corresponding sessions, and conduct independent services. It should be noted that there is no association between the two USIM cards; from the network's perspective, they appear to be two independent UEs.

[0071] The main dual registration process is described above, combined with Figure 3. This dual registration and handover mechanism supports IP preservation, ensuring that the IP address remains unchanged before and after handover, thereby ensuring service continuity. However, this mechanism is only applicable to scenarios where a single SIM card is handing over between the EPC and the 5G core (5GC), and only supports handovers triggered by mobility.

[0072] In summary, the dual registration process has many application constraints and cannot be applied to a wide range of scenarios, resulting in limited flexibility. For example, dual registration cannot be applied in scenarios where both access networks are 5G access networks (using multiple USIM cards). In another example, when a terminal device is connected to two access networks simultaneously, the dual registration process cannot support the offloading of different services to sessions on different access networks.

[0073] Based on this, an embodiment of the present application provides a wireless communication method. In this method, a first terminal device can determine access network information corresponding to one or more services based on first policy information sent by a first network element of the core network, which helps to achieve service diversion, thereby better meeting requirements such as service continuity and increased capacity. The following describes the wireless communication method of an embodiment of the present application in conjunction with Figure 4. Figure 4 is introduced from the perspective of the interaction between the first terminal device and the first network element of the core network.

[0074] In step S410, the first terminal device receives a first message sent by a first network element of the core network, wherein the first message includes first policy information, and the first policy information is used to indicate access network information corresponding to one or more services.

[0075] In some implementations, the first terminal device may be a communication device connected to multiple access networks. Alternatively, the first terminal device may be a communication device that accesses multiple networks through multiple access network devices. For example, the first terminal device may be a device with multiple SIM cards.

[0076] In some implementations, the first terminal device may be one of multiple associated terminal devices connected to multiple access networks. That is, the terminal device may be associated with multiple terminal devices connected to multiple access networks, with the first terminal device being one of the multiple terminal devices. For example, if the terminal device has multiple SIM cards, the first terminal device may be a terminal device represented by one of the SIM cards.

[0077] In some scenarios, the terminal device associated with the first terminal device is a dual SIM card device, one of the dual SIM cards corresponds to the first terminal device, and the other card corresponds to the second terminal device.

[0078] In some scenarios, the first terminal device or a terminal device associated with the first terminal device may be provided with multiple USIM cards, and the device may access multiple access networks through different USIM cards in the multiple USIM cards. For example, the terminal device may be provided with USIM1 and USIM2, and accordingly, access the first access network through USIM1 and access the second access network through USIM2.

[0079] In this embodiment of the present application, the second terminal device associated with the first terminal device may be a terminal device corresponding to another SIM card or USIM card on the terminal device where the SIM card or USIM card corresponding to the first terminal device is located. In other words, the first terminal device and the second terminal device may be terminal devices corresponding to different SIM cards or USIM cards on the same terminal device. For example, on the same terminal device, the first terminal device and the second terminal device may correspond to different access networks.

[0080] In some implementations, the first network element of the core network is a registration management network element in the core network. As an example, the first network element may be an AMF or MME. Of course, in the embodiments of the present application, the first network element may also be another core network element in a future communication system with similar functions to an AMF or MME.

[0081] In some implementations, the first message is a message sent by the first network element to the first terminal device via a corresponding interface. For example, when the first network element is an AMF, the first message can be sent to the first terminal device via an N1 interface.

[0082] In some implementations, the one or more services indicated by the first policy information may be services that communicate based on a multi-access service. In other words, one or more services are transmitted through multiple access networks. Therefore, the policy in the first policy information may also be referred to as a "multi-access policy" or a "multi-access selection policy." In other implementations, the multi-access service is also referred to as "dual steer communication." This type of communication is intended to allow users' services to be flexibly diverted between multiple access networks. Accordingly, the policy in the first policy information may also be referred to as a "dual steer policy."

[0083] In some implementations, the access network information corresponding to the one or more services refers to information about the one or more access networks corresponding to the one or more services. The first policy information includes information about the one or more services.

[0084] In some implementations, the one or more services may include a first service. The first service is any service among the one or more services. The first policy information may indicate the first service based on one or more of the following: an application identity (ID) of the first service, address information of a data packet in the first service, and port information of a data packet in the first service.

[0085] As an example, the information of the first service may be indicated by descriptor information. The descriptor information may be represented by information such as application ID, source / destination address, port, etc. For example, the descriptor information may be represented by an IP quintuple or triplet.

[0086] In some implementations, the first service may be a current service or a service that may be executed subsequently.

[0087] In the embodiment of the present application, one or more services may also refer to one or more services. That is, the first policy information may be used to indicate access network information corresponding to the one or more services.

[0088] In some implementations, the access network information includes information about the access network corresponding to the first terminal device or the second terminal device. The access network information may include one or more of the following information: access network type (AN type), radio access technology (RAT type), and PLMN information.

[0089] In some implementations, the access network type may include a 3GPP access network and a non-3GPP (non-3GPP) access network, which is not limited herein. 3GPP access networks may include access networks in 4G networks, access networks in 5G networks, and access networks in non-terrestrial networks (NTNs). Non-3GPP access networks are, for example, wireless fidelity (Wi-Fi).

[0090] As an example, in an NTN, the access network can be an access network corresponding to geostationary earth orbit (GEO). Of course, it can also be an access network corresponding to low-earth orbit (LEO) or medium-earth orbit (MEO). For example, a terminal device can access the 3GPP network based on the NR-GEO access method.

[0091] In some implementations, the type of radio access technology may include one or more of the following: satellite-based RAT, NR RAT, Wi-Fi RAT, E-UTRAN RAT. Satellite-based RAT is, for example, NR-GEO RAT.

[0092] In some implementations, the PLMN information may include a PLMN ID, such as PLMN A, PLMN B, or PLMN C.

[0093] In some implementations, the first policy information further indicates priority information and / or area information corresponding to one or more services.

[0094] As an example, the priority information includes the priority level corresponding to the service or priority-related information.

[0095] As an example, the area information may be specific area information (location) or associated information of area information. Specific area information may be, for example, specific geographic location information, tracking area (TA) information, or cell information.

[0096] In some implementations, the first policy information may specify an access network selected by a specific service. In other words, the first policy information may instruct a specific service to select a specific access network for transmission. For example, the first policy information may specify one or more access networks corresponding to one or more services.

[0097] In some implementations, the first policy information may specify multiple access networks available to the first terminal device. For example, the first policy information may specify multiple access networks for a first service among one or more services, so that the first terminal device can select an access network from the multiple available access networks when triggering the first service.

[0098] In some implementations, the first policy information is selection policy information. When the first terminal device or the second terminal device has a data packet to send or a service to execute, the first terminal device or the second terminal device can determine, based on the policy, which access network to use to send the data packet or execute the service, thereby achieving service offloading.

[0099] In some implementations, the first policy information may be indicated in a table. Tables 1 to 3 are three possible implementations of the table corresponding to the first policy information.

[0100] Table 1

[0101] Table 2

[0102] Table 3

[0103] In some implementations, the first policy information in the first message can be used to determine the initial policy or to update the policy. That is, the first policy information received by the first terminal device can be the initial policy information or the policy information updated by the second network element.

[0104] In some implementations, the first terminal device may transmit data packets of one or more services to the access network corresponding to the one or more services based on the first policy information. For example, when the first terminal device is in area A and the first policy information determined by the first terminal device is Table 2, if the subsequent first service is the service corresponding to descriptor 1 and the second service is the service corresponding to descriptor 2, the first service may be transmitted via NR and the second service may be transmitted via E-UTRAN.

[0105] As an example, after receiving the first policy information, the first terminal device can determine the SIM card and access network for executing the service based on the service traffic.

[0106] As an example, after receiving the first policy information, the first terminal device can determine which access network to send the data packet through based on the application or data packet that currently triggers the service and the access network information corresponding to the current first terminal device and the second terminal device.

[0107] As an example, the first terminal device and the second terminal device may initiate a session establishment request according to the selected access network to establish a corresponding session to transmit data packets.

[0108] In some implementations, the first network element may send the first message based on a request message from the first terminal device. The request message may be a second message. For example, the first terminal device sends the second message to the first network element before receiving the first message. That is, the first network element receives the second message from the first terminal device before sending the first message to the first terminal device. The second message is used by the first terminal device to send a request for a multi-access service to the first network element.

[0109] As an example, when the first network element sends the first policy information to the first terminal device, it can be sent through a feedback message of the second message or through a dedicated downlink message. For example, the first network element can send the first message to the first terminal device by feedback registration / service request response.

[0110] In some implementations, the second message includes first information, where the first information is used to request service transmission through multiple access networks.

[0111] As an example, the second message may be a registration request message. For example, the first terminal device may send a registration request to the first network element via the second message. The registration request may include the first information to request a multi-access service.

[0112] As an example, the second message may be a multiple access service request message. The first message may be multiple access indication information, and thus may also be referred to as multiple access indication information or "dual steer" indication information, to request multiple access services.

[0113] In the embodiment of the present application, the first information may be explicit indication information or may be indicated in an implicit form.

[0114] In some implementations, when the first information includes information about a second terminal device associated with the first terminal device, it may indicate a request for a multi-access service. As an example, the first information may include the ID information of the second terminal device and / or the access network information of the second terminal device for implicit indication.

[0115] In some implementations, after the first terminal device sends the second message, the first network element may use the first information to perform an authorization check. As an example, the first network element may query the UDM or HSS for corresponding multi-access subscription information. As an example, the first network element may also obtain the ID information of the second terminal device from the subscription information of the UDM or HSS.

[0116] In an embodiment of the present application, the second terminal device may also send a request message to the registration management network element of the core network to subscribe to notifications of policy selection from the policy management network element through the registration management network element.

[0117] As a possible implementation manner, the second terminal device may send a third message to the first network element, wherein the third message includes the first information to request service transmission through multiple access networks.

[0118] In some implementations, after the first terminal device and the second terminal device both send a request message for a multi-access service to the first network element, the first message may not include ID information of the associated terminal device. The first network element may send a request message for the first policy information to the second network element based on the received multiple request messages.

[0119] In some implementations, after the first terminal device and the second terminal device both send a request message for a multi-access service to the first network element, the first network element may send a first message to the first terminal device and the second terminal device.

[0120] As another possible implementation, the second terminal device may send a third message to a third network element, where the third message includes the first information, requesting service transmission through multiple access networks. The third network element may be a registration management network element in the core network. The third network element may be an AMF or MME.

[0121] In some implementations, the third message may also be a registration request message or a multi-access service request message, which will not be described in detail here.

[0122] As an example, the third message may not include the first information. That is, the third message sent by the second terminal device may reuse an existing request message. In this scenario, the third message does not carry the multi-access request indication information and / or associated terminal device information. When the third message reuses an existing request message, the policy management network element may determine that the second terminal device is associated with the first terminal device based on the association information sent by the first terminal device when subscribing.

[0123] In some implementations, after the second terminal device sends the third message to the third network element, the third network element may use the first information to perform an authorization check. As an example, the third network element may query the UDM or HSS for corresponding multi-access subscription information. As an example, the third network element may also obtain the ID information of the first terminal device associated with the second terminal device from the subscription information of the UDM or HSS.

[0124] In some implementations, when the third network element receives the first policy information sent by the policy management network element, the third network element may send the first policy information to the second terminal device.

[0125] The above describes the method for the first terminal device to offload services according to the first policy information in conjunction with Figure 4. The following describes the method for delivering the first policy information from the perspective of multiple network elements in the core network.

[0126] As mentioned above, the first network element and / or the third network element may interact with the policy management network element in the core network to obtain the first policy information. In other words, the first network element and / or the third network element may determine the first policy information through information sent by the policy management network element.

[0127] As an example, when both the first network element and the third network element send request messages for the first policy information to the policy management network element, the policy management network element may only feed back the first policy information to the first network element or the third network element.

[0128] In some implementations, the policy management network element may be represented as a second network element in the core network. The second network element may be a PCF. Of course, in the embodiments of the present application, the second network element may also be another core network element in a future communication system with similar functions to the PCF.

[0129] In some implementations, the first network element sends a fourth message to the second network element, requesting the first policy information. The fourth message is used to send a policy acquisition request to the second network element and, therefore, may also be referred to as a subscription request. After receiving the fourth message, the second network element sends a fifth message to the first network element, the fifth message including the first policy information.

[0130] In some implementations, the fourth message includes one or more of the following information: access network information of the first terminal device; information of the second terminal device associated with the first terminal device.

[0131] As an example, the access network information of the first terminal device may include the access network type, the RAT type and / or the current serving PLMN.

[0132] As an example, the information of the second terminal device associated with the first terminal device may include the ID information of the second terminal device and / or the access network information corresponding to the second terminal device, which is not limited here.

[0133] In some implementations, the second network element may send the fifth message to the first network element in real time after receiving the fourth message. As an example, after the first terminal device registers or initiates a multi-access service request, it may promptly obtain the access network selection policy (first policy information) from the core network. When there are subsequent data packets to be sent, the first terminal device may first select an access network according to the policy, and then initiate a session establishment request. This implementation may support the core network to specify sending policies corresponding to different data streams, and the terminal device may select a suitable access network to establish a session and send the corresponding data packets. In other implementations, the second network element may delay sending the fifth message to the first network element after receiving the fourth message. For example, the first network element may first subscribe to the first policy information through the fourth message, and after generating the first policy information, the second network element may send the first policy information to the first network element through the fifth message.

[0134] In some implementations, when the second terminal device sends a third message to the first network element, in response to the third message, the first network element may send a sixth message to the second network element of the core network, where the sixth message is used to request policy information of the second terminal device.

[0135] In some implementations, when the second terminal device sends a third message to the third network element, in response to the third message, the third network element may send a sixth message to the second network element of the core network, where the sixth message is used to request policy information of the second terminal device.

[0136] In some implementations, the sixth message includes one or more of the following information: access network information of the second terminal device; information of the first terminal device associated with the second terminal device.

[0137] As an example, the access network information of the second terminal device may include the access network type, the RAT type and / or the current serving PLMN.

[0138] As an example, the information of the first terminal device associated with the second terminal device may include the ID information of the first terminal device and / or the access network information corresponding to the first terminal device, which is not limited here.

[0139] In some implementations, the second network element may send the fifth message to the first network element after receiving the fourth message and the sixth message. As an example, the core network obtains associated information from the subscription request of the first terminal device. When the second terminal device also makes a policy request, the core network determines and selects the policy based on the access network information of the first terminal device and the second terminal device and issues it. That is, the core network issues the first policy information only after both the first terminal device and the second terminal device register or request. This implementation will not issue the first policy information in real time when a single terminal device subscribes to a policy request, but will wait until both associated terminal devices are connected to the network before configuring and issuing the first policy information based on the access networks of the two terminal devices.

[0140] In some implementations, the first policy information sent by the second network element to the first network element may be determined based on current access network information of the first terminal device and / or the second terminal device. For example, the first policy information may be determined based on current access network information of the first terminal device.

[0141] As an example, the current access network information may be carried in the policy request sent by the first network element or the third network element. For example, the fourth message or the sixth message includes the access network information.

[0142] As an example, the second network element may obtain the access network information of the current terminal device from other network elements of the core network.

[0143] The above describes the method for the first terminal device to obtain the first policy information from multiple interaction perspectives. The core network can issue the first policy information after receiving a policy subscription request from a terminal device, or select and issue the policy after receiving policy subscription requests from two associated terminal devices.

[0144] The following describes the embodiments of the present application in more detail with reference to the specific examples of Figures 5 and 6. It should be noted that the example of Figure 4 is merely to help those skilled in the art understand the embodiments of the present application, and is not intended to limit the embodiments of the present application to the specific numerical values ​​or specific scenarios illustrated. It is obvious that those skilled in the art can make various equivalent modifications or changes based on the example of Figure 4, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0145] Figure 5 is a flowchart of a possible implementation of an embodiment of the present application. In the example of Figure 5, the first terminal device is UE1, the second terminal device is UE2, the first network element of the core network is AMF1, the second network element is PCF1, and the third network element is AMF2. UE1 and UE2 are associated with each other.

[0146] 5 , in step S510 , UE1 sends a registration request / multi-access service request, i.e., a second message, to AMF1 . The second message may include multi-access indication information.

[0147] In step S520, AMF1 interacts with UDM to complete the authorization / subscription check of UE1.

[0148] In step S530, AMF1 sends a multi-access policy acquisition request, i.e., a fourth message, to PCF1. The fourth message includes the access network information of UE1.

[0149] In step S540, PCF1 feeds back the first policy information to AMF1.

[0150] In step S550, AMF1 sends a registration response / multi-access service response to UE1, that is, a first message including the first policy information. Of course, the first policy information can also be requested and obtained in the form of subscription or notification.

[0151] In step S560, UE1 (or the mobile device (Dual Steer Device) to which UE1 belongs) determines the USIM card and access network according to the service.

[0152] In step S570a, UE1 performs a session establishment process with multiple network elements.

[0153] In step S570b, UE2 performs a session establishment process with multiple network elements.

[0154] Figure 6 is a flow chart of another possible implementation of an embodiment of the present application. In the example of Figure 6, the first terminal device is UE1, the second terminal device is UE2, the first network element of the core network is AMF1, the second network element is PCF1, and the third network element is AMF2. UE1 and UE2 are associated with each other.

[0155] 6 , in step S601, UE1 sends a registration request / multi-access service request, i.e., a second message, to AMF1. The second message may include multi-access indication information.

[0156] In step S602, AMF1 interacts with UDM to complete the authorization / subscription check of UE1.

[0157] In step S603, AMF1 sends a multi-access policy acquisition request, i.e., a fourth message, to PCF1. The fourth message includes the access network information of UE1 and the information of the associated UE2.

[0158] In step S604, AMF1 sends a registration response / multi-access service response to UE1.

[0159] In step S605, UE2 sends a registration request / multi-access service request to AMF2, which may include multi-access indication information. It should be understood that AMF2 may be the same AMF as AMF1.

[0160] In step S606, AMF2 interacts with UDM to complete the authorization / subscription check of UE2.

[0161] In step S607, AMF2 sends a multi-access policy acquisition request, i.e., a sixth message, to PCF1. The sixth message includes the access network information of UE2 and the associated information of UE1.

[0162] In step S608, AMF2 sends a registration response / multi-access service response to UE2.

[0163] In step S609, PCF1 feeds back the first policy information to AMF1.

[0164] In step S610, AMF1 sends first policy information to UE1 for determining an initial policy or an updated policy.

[0165] In step S611, UE1 (or a mobile device (Dual Steer Device) to which UE1 belongs) determines a USIM card and an access network according to the service.

[0166] In step S612a, UE1 performs a session establishment process with multiple network elements.

[0167] In step S612b, UE2 performs a session establishment process with multiple network elements.

[0168] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 6 . The device embodiment of the present application is described in detail below in conjunction with Figures 7 to 10 . It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0169] FIG7 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 700 shown in FIG7 includes a first terminal device. As shown in FIG7 , the terminal device 700 includes a receiving unit 710 .

[0170] The receiving unit 710 can be used to receive a first message sent by a first network element of the core network, where the first message includes first policy information, and the first policy information is used to indicate access network information corresponding to one or more services.

[0171] Optionally, the first policy information is further used to indicate priority information and / or area information corresponding to each of the one or more services.

[0172] Optionally, the access network information includes one or more of the following information: access network type, type of wireless access technology, and PLMN information.

[0173] Optionally, the one or more services include a first service, and the first policy information indicates the first service based on one or more of the following: application identification of the first service; address information of the data packet in the first service; port information of the data packet in the first service.

[0174] Optionally, the terminal device 700 also includes a first sending unit, which can be used to send a second message to the first network element before receiving the first message sent by the first network element of the core network, where the second message includes first information, and the first information is used to request service transmission through multiple access networks.

[0175] Optionally, the first information includes information of a second terminal device associated with the first terminal device.

[0176] Optionally, the second message is a registration request message.

[0177] Optionally, the first terminal device is associated with a second terminal device, and the second terminal device includes a second sending unit, which can be used to send a third message to the first network element or a third network element before receiving the first message sent by the first network element of the core network, and the third message includes first information, and the first information is used to request service transmission through multiple access networks.

[0178] Optionally, the third message is a registration request message.

[0179] Optionally, the terminal device 700 further includes a third sending unit, configured to transmit data packets of the one or more services to an access network corresponding to the one or more services according to the first policy information.

[0180] Optionally, the first network element is AMF or MME.

[0181] Figure 8 is a schematic diagram of a core network device according to an embodiment of the present application. The core network device 800 shown in Figure 8 is a first network element of the core network. As shown in Figure 8 , the core network device 800 includes a first sending unit 810 .

[0182] The first sending unit 810 can be used to send a first message to a first terminal device, where the first message includes first policy information, and the first policy information is used to indicate access network information corresponding to one or more services.

[0183] Optionally, the first policy information is further used to indicate priority information and / or area information corresponding to each of the one or more services.

[0184] Optionally, the access network information includes one or more of the following: access network type, type of wireless access technology, and PLMN information.

[0185] Optionally, the one or more services include a first service, and the first policy information indicates the first service based on one or more of the following: application identification of the first service; address information of the data packet in the first service; port information of the data packet in the first service.

[0186] Optionally, the core network device 800 also includes a first receiving unit, which can be used to receive a second message sent by the first terminal device before sending a first message to the first terminal device, where the second message contains first information, and the first information is used to request service transmission through multiple access networks.

[0187] Optionally, the first information includes information of a second terminal device associated with the first terminal device.

[0188] Optionally, the second message is a registration request message.

[0189] Optionally, the core network device 800 also includes a second receiving unit, which can be used to receive a third message sent by the second terminal device before sending the first message to the first terminal device, where the third message contains first information, and the first information is used to request service transmission through multiple access networks.

[0190] Optionally, the third message is a registration request message.

[0191] Optionally, the third network element is AMF or MME.

[0192] Optionally, the core network device 800 further includes a second sending unit, which can be used to send a fourth message to the second network element of the core network before sending the first message to the first terminal device, where the fourth message is used to request the first policy information.

[0193] Optionally, the fourth message includes one or more of the following information: access network information of the first terminal device; information of the second terminal device associated with the first terminal device.

[0194] Optionally, the core network device 800 further includes a third receiving unit, which is configured to receive a fifth message sent by the second network element, where the fifth message includes the first policy information.

[0195] Optionally, the core network device 800 further includes a third sending unit, which can be used to send a sixth message to the second network element of the core network in response to the third message, where the sixth message is used to request policy information of the second terminal device.

[0196] Optionally, the sixth message includes one or more of the following information: access network information of the second terminal device; information of the first terminal device associated with the second terminal device.

[0197] Optionally, the second network element is a PCF.

[0198] Optionally, the first network element is AMF or MME.

[0199] Figure 9 is a schematic diagram of a core network device according to an embodiment of the present application. The core network device 900 shown in Figure 9 is a second network element of the core network. As shown in Figure 9 , the core network device 900 includes a first receiving unit 910 .

[0200] The first receiving unit 910 can be used to receive a fourth message sent by a first network element of the core network, where the fourth message is used to request first policy information of a first terminal device, and the first policy information is used to indicate access network information corresponding to one or more services.

[0201] Optionally, the fourth message includes one or more of the following information: access network information of the first terminal device; information of the second terminal device associated with the first terminal device.

[0202] Optionally, the core network device 900 further includes a sending unit, which is configured to send a fifth message to the first network element, where the fifth message includes the first policy information.

[0203] Optionally, the first policy information is further used to indicate priority information and / or area information corresponding to each of the one or more services.

[0204] Optionally, the access network information includes one or more of the following: access network type, type of wireless access technology, and PLMN information.

[0205] Optionally, the one or more services include a first service, and the first policy information indicates the first service based on one or more of the following: application identification of the first service; address information of the data packet in the first service; port information of the data packet in the first service.

[0206] Optionally, the core network device 900 further includes a second receiving unit, which can be used to receive a sixth message sent by the first network element or the third network element, where the sixth message is used to request policy information of the second terminal device.

[0207] Optionally, the sixth message includes one or more of the following information: access network information of the second terminal device; information of the first terminal device associated with the second terminal device.

[0208] Optionally, the third network element is AMF or MME.

[0209] Optionally, the second network element is a PCF.

[0210] Optionally, the first network element is AMF or MME.

[0211] Figure 10 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 10 indicate that the unit or module is optional. The device 1000 may be used to implement the method described in the above method embodiment. The device 1000 may be a chip, a terminal device, or a network device.

[0212] The device 1000 may include one or more processors 1010. The processor 1010 may support the device 1000 to implement the method described in the method embodiment above. The processor 1010 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0213] The apparatus 1000 may further include one or more memories 1020. The memories 1020 store programs that can be executed by the processor 1010, causing the processor 1010 to perform the methods described in the above method embodiments. The memories 1020 may be independent of the processor 1010 or integrated into the processor 1010.

[0214] The apparatus 1000 may further include a transceiver 1030. The processor 1010 may communicate with other devices or chips via the transceiver 1030. For example, the processor 1010 may transmit and receive data with other devices or chips via the transceiver 1030.

[0215] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0216] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0217] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0218] It should be understood that the terms used in this application are intended only to explain the specific embodiments of this application and are not intended to limit this application. The terms "first," "second," and so on in the specification, claims, and accompanying drawings of this application are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0219] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0220] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0221] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0222] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0223] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0224] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0225] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0226] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0227] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0228] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0229] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can 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 process or function described in the embodiment of the present application is 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 transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0230] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The first terminal device receives a first message sent by a first network element of a core network, where the first message includes first policy information, and the first policy information is used to indicate access network information corresponding to one or more services.

2. The method according to claim 1, characterized in that The first policy information is further used to indicate priority information and / or area information corresponding to each of the one or more services.

3. The method according to claim 1 or 2, characterized in that The access network information includes one or more of the following information: access network type, type of wireless access technology, and PLMN information.

4. The method according to any one of claims 1 to 3, characterized in that The one or more services include a first service, and the first policy information indicates the first service based on one or more of the following: an application identifier of the first service; address information of the data packet in the first service; Port information of the data packet in the first service.

5. The method according to any one of claims 1 to 4, characterized in that Before the first terminal device receives the first message sent by the first network element of the core network, the method further includes: The first terminal device sends a second message to the first network element, where the second message includes first information, and the first information is used to request service transmission through multiple access networks.

6. The method according to claim 5, characterized in that The first information includes information of a second terminal device associated with the first terminal device.

7. The method according to claim 5 or 6, characterized in that The second message is a registration request message.

8. The method according to any one of claims 1 to 7, characterized in that Before the first terminal device receives the first message sent by the first network element of the core network, the method further includes: The second terminal device sends a third message to the first network element or the third network element, where the third message includes first information, and the first information is used to request service transmission through multiple access networks.

9. The method according to claim 8, characterized in that The third message is a registration request message.

10. The method according to any one of claims 1 to 9, characterized in that The method further comprises: The first terminal device transmits data packets of the one or more services to the access network corresponding to the one or more services according to the first policy information.

11. The method according to any one of claims 1 to 10, characterized in that The first network element is AMF or MME.

12. A wireless communication method, characterized in that: include: A first network element of a core network sends a first message to a first terminal device, where the first message includes first policy information, and the first policy information is used to indicate access network information corresponding to one or more services.

13. The method according to claim 12, characterized in that The first policy information is further used to indicate priority information and / or area information corresponding to each of the one or more services.

14. The method according to claim 12 or 13, characterized in that The access network information includes one or more of the following: access network type, type of wireless access technology, and PLMN information.

15. The method according to any one of claims 12 to 14, characterized in that The one or more services include a first service, and the first policy information indicates the first service based on one or more of the following: an application identifier of the first service; address information of the data packet in the first service; Port information of the data packet in the first service.

16. The method according to any one of claims 12 to 15, characterized in that Before the first network element of the core network sends the first message to the first terminal device, the method further includes: The first network element receives a second message sent by the first terminal device, where the second message includes first information, and the first information is used to request service transmission through multiple access networks.

17. The method according to claim 16, characterized in that The first information includes information of a second terminal device associated with the first terminal device.

18. The method according to claim 16 or 17, characterized in that The second message is a registration request message.

19. The method according to any one of claims 12 to 18, characterized in that Before the first network element of the core network sends the first message to the first terminal device, the method further includes: The first network element or the third network element receives a third message sent by the second terminal device, where the third message includes first information, and the first information is used to request service transmission through multiple access networks.

20. The method according to claim 19, characterized in that The third message is a registration request message.

21. The method according to claim 19 or 20, characterized in that The third network element is AMF or MME.

22. The method according to any one of claims 12 to 21, characterized in that Before the first network element of the core network sends the first message to the first terminal device, the method further includes: The first network element sends a fourth message to the second network element of the core network, where the fourth message is used to request the first policy information.

23. The method according to claim 22, characterized in that The fourth message includes one or more of the following information: access network information of the first terminal device; Information of the second terminal device associated with the first terminal device.

24. The method according to claim 22 or 23, characterized in that The method further comprises: The first network element receives a fifth message sent by the second network element, where the fifth message includes the first policy information.

25. The method according to any one of claims 19 to 21, characterized in that The method further comprises: In response to the third message, the first network element sends a sixth message to the second network element of the core network, where the sixth message is used to request policy information of the second terminal device.

26. The method according to claim 25, characterized in that The sixth message includes one or more of the following information: access network information of the second terminal device; Information of the first terminal device associated with the second terminal device.

27. The method according to any one of claims 22 to 26, characterized in that The second network element is a PCF.

28. The method according to any one of claims 12 to 27, characterized in that The first network element is AMF or MME.

29. A wireless communication method, characterized in that: include: The second network element of the core network receives a fourth message sent by the first network element of the core network, where the fourth message is used to request first policy information of the first terminal device, and the first policy information is used to indicate access network information corresponding to one or more services.

30. The method according to claim 29, wherein The fourth message includes one or more of the following information: access network information of the first terminal device; Information of the second terminal device associated with the first terminal device.

31. The method according to claim 29 or 30, characterized in that The method further comprises: The second network element sends a fifth message to the first network element, where the fifth message includes the first policy information.

32. The method according to any one of claims 29 to 31, characterized in that The first policy information is further used to indicate priority information and / or area information corresponding to each of the one or more services.

33. The method according to any one of claims 29 to 32, characterized in that The access network information includes one or more of the following: access network type, type of wireless access technology, and PLMN information.

34. The method according to any one of claims 29 to 33, characterized in that The one or more services include a first service, and the first policy information indicates the first service based on one or more of the following: an application identifier of the first service; address information of the data packet in the first service; Port information of the data packet in the first service.

35. The method according to any one of claims 29 to 34, characterized in that The method further comprises: The second network element receives a sixth message sent by the first network element or the third network element, where the sixth message is used to request policy information of a second terminal device.

36. The method according to claim 35, characterized in that The sixth message includes one or more of the following information: access network information of the second terminal device; Information of the first terminal device associated with the second terminal device.

37. The method according to claim 35 or 36, characterized in that The third network element is AMF or MME.

38. The method according to any one of claims 29 to 37, characterized in that The second network element is a PCF.

39. The method according to any one of claims 29 to 38, characterized in that The first network element is AMF or MME.

40. A terminal device, characterized in that: The terminal device includes a first terminal device, and the terminal device includes: The receiving unit is used to receive a first message sent by a first network element of the core network, where the first message includes first policy information, and the first policy information is used to indicate access network information corresponding to one or more services.

41. The terminal device according to claim 40, characterized in that The first policy information is further used to indicate priority information and / or area information corresponding to each of the one or more services.

42. The terminal device according to claim 40 or 41, characterized in that: The access network information includes one or more of the following information: access network type, type of wireless access technology, and PLMN information.

43. The terminal device according to any one of claims 40 to 42, characterized in that: The one or more services include a first service, and the first policy information indicates the first service based on one or more of the following: an application identifier of the first service; address information of the data packet in the first service; Port information of the data packet in the first service.

44. The terminal device according to any one of claims 40 to 43, characterized in that: The terminal device further includes: The first sending unit is used to send a second message to a first network element of a core network before receiving a first message sent by the first network element, where the second message includes first information, and the first information is used to request service transmission through multiple access networks.

45. The terminal device according to claim 44, characterized in that The first information includes information of a second terminal device associated with the first terminal device.

46. The terminal device according to claim 44 or 45, characterized in that The second message is a registration request message.

47. The terminal device according to any one of claims 40 to 46, characterized in that: The first terminal device is associated with a second terminal device, and the second terminal device includes: The second sending unit is used to send a third message to the first network element before the first terminal device receives the first message sent by the first network element of the core network, where the third message includes first information, and the first information is used to request service transmission through multiple access networks.

48. The terminal device according to claim 47, characterized in that The third message is a registration request message.

49. The terminal device according to any one of claims 40 to 48, characterized in that The terminal device further includes: The third sending unit is configured to transmit data packets of the one or more services to the access network corresponding to the one or more services according to the first policy information.

50. The terminal device according to any one of claims 40 to 49, characterized in that: The first network element is AMF or MME.

51. A core network device, characterized in that: The core network device is a first network element of the core network, and the core network device includes: The first sending unit is used to send a first message to a first terminal device, where the first message includes first policy information, and the first policy information is used to indicate access network information corresponding to one or more services.

52. The core network device according to claim 51, characterized in that: The first policy information is further used to indicate priority information and / or area information corresponding to each of the one or more services.

53. The core network device according to claim 51 or 52, characterized in that: The access network information includes one or more of the following: access network type, type of wireless access technology, and PLMN information.

54. The core network device according to any one of claims 51 to 53, characterized in that: The one or more services include a first service, and the first policy information indicates the first service based on one or more of the following: an application identifier of the first service; address information of the data packet in the first service; Port information of the data packet in the first service.

55. The core network device according to any one of claims 51 to 54, characterized in that: The core network equipment further includes: The first receiving unit is used to receive a second message sent by a first terminal device before sending a first message to the first terminal device, where the second message includes first information, and the first information is used to request service transmission through multiple access networks.

56. The core network device according to claim 55, characterized in that: The first information includes information of a second terminal device associated with the first terminal device.

57. The core network device according to claim 55 or 56, characterized in that: The second message is a registration request message.

58. The core network device according to any one of claims 51 to 57, characterized in that: The core network equipment further includes: The second receiving unit is configured to receive a third message sent by the second terminal device before sending the first message to the first terminal device. The third message includes first information, where the first information is used to request service transmission through multiple access networks.

59. The core network device according to claim 58, characterized in that: The third message is a registration request message.

60. The core network device according to claim 58 or 59, characterized in that: The third network element is AMF or MME.

61. The core network device according to any one of claims 51 to 60, characterized in that: The core network equipment further includes: The second sending unit is used to send a fourth message to the second network element of the core network before sending the first message to the first terminal device, where the fourth message is used to request the first policy information.

62. The core network device according to claim 61, characterized in that: The fourth message includes one or more of the following information: access network information of the first terminal device; Information of the second terminal device associated with the first terminal device.

63. The core network device according to claim 61 or 62, characterized in that: The core network equipment further includes: The third receiving unit is configured to receive a fifth message sent by the second network element, where the fifth message includes the first policy information.

64. The core network device according to any one of claims 58 to 60, characterized in that: The core network equipment further includes: The third sending unit is used to send a sixth message to the second network element of the core network in response to the third message, where the sixth message is used to request policy information of the second terminal device.

65. The core network device according to claim 64, characterized in that: The sixth message includes one or more of the following information: access network information of the second terminal device; Information of the first terminal device associated with the second terminal device.

66. The core network device according to any one of claims 61 to 65, characterized in that: The second network element is a PCF.

67. The core network device according to any one of claims 51 to 66, characterized in that: The first network element is AMF or MME.

68. A core network device, characterized in that: The core network device is a second network element of the core network, and the core network device includes: The first receiving unit is used to receive a fourth message sent by a first network element of the core network, where the fourth message is used to request first policy information of a first terminal device, and the first policy information is used to indicate access network information corresponding to one or more services.

69. The core network device according to claim 68, characterized in that The fourth message includes one or more of the following information: access network information of the first terminal device; Information of the second terminal device associated with the first terminal device.

70. The core network device according to claim 68 or 69, characterized in that: The core network equipment further includes: A sending unit is used to send a fifth message to the first network element, where the fifth message includes the first policy information.

71. The core network device according to any one of claims 68 to 70, characterized in that: The first policy information is further used to indicate priority information and / or area information corresponding to each of the one or more services.

72. The core network device according to any one of claims 68 to 71, characterized in that: The access network information includes one or more of the following: access network type, type of wireless access technology, and PLMN information.

73. The core network device according to any one of claims 68 to 72, characterized in that: The one or more services include a first service, and the first policy information indicates the first service based on one or more of the following: an application identifier of the first service; address information of the data packet in the first service; Port information of the data packet in the first service.

74. The core network device according to any one of claims 68 to 73, characterized in that: The core network equipment further includes: The second receiving unit is used to receive a sixth message sent by the first network element or the third network element, where the sixth message is used to request policy information of the second terminal device.

75. The core network device according to claim 74, characterized in that: The sixth message includes one or more of the following information: access network information of the second terminal device; Information of the first terminal device associated with the second terminal device.

76. The core network device according to claim 74 or 75, characterized in that: The third network element is AMF or MME.

77. The core network device according to any one of claims 68 to 76, characterized in that: The second network element is a PCF.

78. The core network device according to any one of claims 68 to 77, characterized in that: The first network element is AMF or MME.

79. A terminal device, characterized in that: The terminal device comprises a transceiver, a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory and control the transceiver to receive or send a signal so that the terminal device executes the method according to any one of claims 1 to 11.

80. A core network device, characterized in that: It includes a transceiver, a memory and a processor, the memory is used to store programs, the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the core network device executes the method as described in any one of claims 12-39.

81. A device, characterized in that The device comprises a processor configured to call a program from a memory so as to cause the device to execute the method according to any one of claims 1 to 39.

82. A chip, characterized in that The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes the method according to any one of claims 1 to 39.

83. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 39.

84. A computer program product, characterized in that The method comprises a program for causing a computer to execute the method according to any one of claims 1 to 39.

85. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 39.

Images