Data transmission method, device and storage medium

Abstract

The embodiment of the present application provides a data transmission method, device and storage medium, the method comprising: a remote device sends information of the remote device to a PCF network element of a core network through a relay device, the PCF network element generates URSP information according to the information of the remote device, and the PCF network element sends URSP information to the remote device through the relay device, so that the remote device establishes a PDU session of the relay service according to the URSP information. The above method enables a remote device located outside the network coverage to connect to the network through the relay device, and establish a PDU session according to the URSP information sent by the network, thereby improving the data transmission efficiency.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular, to a data transmission method, device, and storage medium. Background Art

[0002] In the latest 3rd generation partnership project (3GPP) protocol, the concept of UE route selection policy (URSP) is defined to determine whether a detected application can be associated with an established protocol data unit (PDU) session, whether it can be offloaded to a non-3GPP access outside of a PDU session, or whether it can trigger the establishment of a new PDU session.

[0003] At present, the user equipment obtains the URSP information that the device needs to follow from the policy control function (PCF) network element of the core network and provides it to the user equipment. The user equipment can route the data to be sent by the application according to the URSP information. Summary of the invention

[0004] The embodiments of the present application provide a data transmission method, device and storage medium, which realize a technical solution for a remote device to obtain a session establishment rule configured in a network through a relay device and establish a relay service session.

[0005] In a first aspect, an embodiment of the present application provides a data transmission method, including: a policy control function PCF network element generates user equipment routing policy URSP information, wherein the URSP information is used to indicate a session establishment policy for a relay service; and the PCF network element sends the URSP information to a remote device via a relay device.

[0006] In a second aspect, an embodiment of the present application provides a data transmission method, including: a relay device receives a user equipment routing selection policy URSP information sent by a policy control function PCF network element, wherein the URSP information is used to indicate a session establishment policy for a relay service; and the relay device sends the URSP information to a remote device.

[0007] In a third aspect, an embodiment of the present application provides a data transmission method, including: a remote device receives user equipment routing selection policy URSP information sent by a policy control function PCF network element, the URSP information is used to indicate a session establishment policy for a relay service; the remote device establishes a session according to the URSP information.

[0008] In a fourth aspect, an embodiment of the present application provides a network device, including: a processing module, used to generate user equipment routing selection policy URSP information, the URSP information is used to indicate a session establishment policy for a relay service; a sending module, used to send the URSP information to a remote device via a relay device.

[0009] In a fifth aspect, an embodiment of the present application provides a relay device, comprising: a receiving module for receiving user equipment routing selection policy URSP information sent by a policy control function PCF network element, wherein the URSP information is used to indicate a session establishment policy for a relay service; and a sending module for sending the URSP information to a remote device.

[0010] In a sixth aspect, an embodiment of the present application provides a remote device, comprising: a receiving module for receiving user equipment routing selection policy URSP information sent by a policy control function PCF network element, wherein the URSP information is used to indicate a session establishment policy for a relay service; and a processing module for establishing a session according to the URSP information.

[0011] In a seventh aspect, an embodiment of the present application provides a network device, comprising: a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the processor runs the computer program to execute any one of the methods described in the first aspect.

[0012] In an eighth aspect, an embodiment of the present application provides a relay device, comprising: a memory and a processor, the memory being used to store a computer program, the processor being used to call and run the computer program from the memory, so that the processor runs the computer program to execute any one of the methods described in the second aspect.

[0013] In the ninth aspect, an embodiment of the present application provides a remote device, comprising: a memory and a processor, the memory being used to store a computer program, the processor being used to call and run the computer program from the memory, so that the processor runs the computer program to execute any one of the methods described in the third aspect.

[0014] In a tenth aspect, an embodiment of the present application provides a storage medium, wherein the storage medium includes a computer program, and the computer program is used to implement a method as described in any one of the first aspects.

[0015] In an eleventh aspect, an embodiment of the present application provides a storage medium, wherein the storage medium includes a computer program, and the computer program is used to implement the method as described in any one of the second aspects.

[0016] In a twelfth aspect, an embodiment of the present application provides a storage medium, wherein the storage medium includes a computer program, and the computer program is used to implement a method as described in any one of the third aspects.

[0017] The embodiment of the present application provides a data transmission method, device and storage medium, the method comprising: a remote device sends information of the remote device to a PCF network element of a core network through a relay device, the PCF network element generates URSP information according to the information of the remote device, and the PCF network element sends URSP information to the remote device through the relay device, so that the remote device establishes a PDU session of the relay service according to the URSP information. The above method enables a remote device located outside the network coverage to connect to the network through the relay device, and establish a PDU session according to the URSP information sent by the network, thereby improving the data transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a network architecture provided for an embodiment of the present application;

[0019] Figure 2 A schematic diagram of a scenario provided for an embodiment of the present application;

[0020] Figure 3 A schematic diagram of a scenario provided for an embodiment of the present application;

[0021] Figure 4 An interactive schematic diagram of a data transmission method provided in an embodiment of the present application;

[0022] Figure 5 An interactive schematic diagram of a data transmission method provided in an embodiment of the present application;

[0023] Figure 6 An interactive schematic diagram of a data transmission method provided in an embodiment of the present application;

[0024] Figure 7 An interactive schematic diagram of a data transmission method provided in an embodiment of the present application;

[0025] Figure 8 A schematic diagram of the structure of a network device provided in an embodiment of the present application;

[0026] Fig. 9 A schematic diagram of the structure of a network device provided in an embodiment of the present application;

[0027] Fig.10 A schematic diagram of the structure of a relay device provided in an embodiment of the present application;

[0028] Fig.11 A schematic diagram of the structure of a relay device provided in an embodiment of the present application;

[0029] Fig.12 A schematic diagram of the structure of a remote device provided in an embodiment of the present application;

[0030] Fig.13 A schematic diagram of the structure of a remote device provided in an embodiment of the present application;

[0031] Fig.14 A schematic diagram of the hardware structure of a network device provided in an embodiment of the present application;

[0032] Fig.15 A schematic diagram of the hardware structure of a relay device provided in an embodiment of the present application;

[0033] Fig.16 A schematic diagram of the hardware structure of a remote device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] The terms "including" and "having" and any variations thereof in the specification, claims and above-mentioned drawings of the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatus.

[0036] In order to better understand the data transmission method provided in the embodiment of the present application, the network architecture involved in the embodiment of the present application is described below.

[0037] Figure 1 A schematic diagram of a network architecture provided in an embodiment of the present application. Figure 1As shown in the figure, the 5G network architecture released by the 3GPP standard group includes: terminal (user equipment, UE), access network supporting 3GPP technology (including radio access network, RAN or access network, AN), user plane function (user plane function, UPF) network element, access and mobility management function (access and mobility management function, AMF) network element, session management function (session management function, SMF) network element, policy control function (policy control function, PCF) network element, application function (application function, AF) and data network (data network, DN).

[0038] Those skilled in the art will understand that Figure 1 The 5G network architecture shown in the figure does not constitute a limitation on the 5G network architecture. In specific implementation, the 5G network architecture may include more or fewer network elements than shown in the figure, or combine certain network elements, etc. It should be understood that Figure 1 In the specification, AN or RAN is represented by (R)AN.

[0039] The terminal in the embodiments of the present application may be a user equipment (UE), a handheld terminal, a laptop computer, a subscriber unit, a cellular phone, a smartphone, a wireless data card, a personal digital assistant (PDA) computer, a tablet computer, a wireless modem, a handheld device (handheld), a laptop computer, a cordless phone or a wireless local loop (WLL) station, a machine type communication (MTC) terminal, a handheld device with wireless communication function, a computing device, a processing device connected to a wireless modem, a drone, a vehicle-mounted device, a wearable device, a terminal in the Internet of Things, a virtual reality device, a terminal device in a future 5G network, a terminal in a future evolved public land mobile network (PLMN), etc.

[0040] The access network device in the embodiment of the present application is an access device that the terminal accesses to the network architecture by wireless means, and is mainly responsible for wireless resource management, quality of service (QoS) management, data compression and encryption, etc. on the air interface side. For example: base station NodeB, evolved base station eNodeB, base station in 5G mobile communication system or new generation wireless (newradio, NR) communication system, base station in future mobile communication system, etc.

[0041] UPF network elements, AMF network elements, SMF network elements, and PCF network elements are network elements of the 3GPP core network (referred to as: core network network elements). UPF network elements can be called user plane function network elements, which are 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, etc., to ensure reliable and stable transmission of user data.

[0042] UPF network elements can be used to forward and receive data from terminals. For example, UPF network elements can receive service data from the data network and transmit it to the terminal through the access network equipment; UPF network elements can also receive user data from the terminal through the access network equipment and forward it to the data network. Among them, 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: the user plane connection between the UPF network element and the access network equipment, and the establishment of a channel between the access network equipment and the terminal. Among them, the user plane connection is a quality of service (QoS) flow that can be established between the UPF network element and the access network equipment to transmit data.

[0043] The AMF network element can be used to manage the 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 to store the session identifier, the SMF network element identifier associated with the session identifier, etc. while providing services for the terminal session.

[0044] SMF network elements can be used to select user plane network elements for terminals, redirect user plane network elements for terminals, allocate Internet Protocol (IP) addresses to terminals, establish bearers (also called sessions) between terminals and UPF network elements, modify and release sessions, and control QoS.

[0045] The PCF network element is used to provide policies to the AMF network element and the SMF network element, such as QoS policy and slice selection policy.

[0046] The AF network element 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.

[0047] DN can provide data services to users for IP multi-media service (IMS) networks, the Internet, etc. There can be multiple application servers (AS) in DN, providing different application services, such as operator services, Internet access or third-party services, etc. AS can implement the functions of AF.

[0048] In wireless communications, proximity services (ProSe) technology can be used to enable user equipment UE outside the cell coverage to communicate with the base station through UE within the cell coverage, thereby improving data transmission efficiency. Among them, the UE outside the cell coverage is called the remote UE, and the UE within the cell coverage is called the relay UE. Figure 1 The remote UE uses the discovery process in the ProSe technology to determine the relay UE and establish a connection and communication with the relay UE. The remote UE accesses the network through the relay UE, and the relay UE is used to transmit data between the remote UE and the network.

[0049] Figure 2 A schematic diagram of a scenario provided in an embodiment of the present application, such as Figure 2 As shown, the remote UE is connected to the public land mobile network PLMN2 where the relay device is located through the relay UE. The policy control function network element PCF2 in PLMN2 needs to obtain the policy information of the remote UE from PCF1 in the public land mobile network HPLMN where the remote UE is located, and generate the user equipment routing policy URSP information according to the policy information. The remote UE obtains the URSP information through the relay UE, thereby establishing a PDU session.

[0050] Figure 3 A schematic diagram of a scenario provided in an embodiment of the present application, such as Figure 3 As shown, the remote UE is connected to the PLMN1 where the relay device is located through the relay UE, and Figure 2 The difference is that the PLMN1 where the relay device is located is the HPLMN of the remote UE. The PCF1 in the PLMN1 directly generates URSP information and sends the URSP information to the remote UE through the relay UE. The remote UE establishes a PDU session according to the URSP information.

[0051] Based on any of the above scenarios, an embodiment of the present application provides a data transmission method that generates and configures session establishment rules for remote devices, and implements a technical solution for remote devices to establish relay service sessions through relay devices. The method includes: after the remote device establishes a connection with the relay device, the remote device sends information about the remote device to the network side through the relay device, and the network side generates URSP information based on the information of the remote device, and sends the URSP information to the remote device through the relay device, wherein the URSP information is used to indicate the session establishment strategy for the relay service. The remote device establishes a PDU session based on the received URSP information. Through the above solution provided by the present application, a remote device located outside the network coverage area is connected to the network through a relay device, and the remote device can establish a PDU session according to actual business needs, thereby improving data transmission efficiency.

[0052] The technical solutions shown in the present application are described in detail below through specific embodiments. It should be noted that the following embodiments can exist alone or in combination with each other. For the same or similar contents, such as the explanation of terms or nouns, and the explanation of steps, etc., they can be referenced to each other in different embodiments and will not be repeated.

[0053] Combination Figures 4 to 7 The data transmission method shown in the embodiment describes in detail the technical solution of how a remote device located outside the network coverage in a communication system establishes a relay service session.

[0054] Figure 4 The following is an interactive diagram of a data transmission method provided in an embodiment of the present application. Figure 4 As shown, the method provided in this embodiment includes the following steps:

[0055] Step 101: The remote device sends the information of the remote device to the relay device.

[0056] In this embodiment, the information of the remote device sent by the remote device to the relay device includes at least one of the following:

[0057] The remote device's identification, Internet Protocol IP address, and port number.

[0058] The identifier of the remote device can be SUPI (SUbscription Permanent Identifier), which is the unique permanent identity mark of the user in the 5G network, similar to the International Mobile Subscriber Identity (IMSI) in the LTE (Long Term Evolution) network.

[0059] Step 102: The relay device sends the remote device information to the PCF network element.

[0060] In a possible implementation manner, the relay device sends the information of the remote device to the PCF network element, specifically including: the relay device sends a non-connection layer NAS message to the PCF network element, and the NAS message includes the information of the remote device.

[0061] Step 103: The PCF network element generates URSP information according to the information of the remote device.

[0062] In this embodiment, the URSP information generated by the PCF network element is used to indicate a session establishment strategy for a remote device relay service.

[0063] In a possible implementation, the PCF network element is a PCF network element of a public land mobile network HPLMN where the remote device is located. The PCF network element generates URSP information based on information of the remote device, specifically including: the PCF network element generates UPSP information based on local configuration information and information of the remote device. The local configuration information includes policy information of the remote device.

[0064] In another possible implementation, the PCF network element is a PCF network element of a public land mobile network PLMN where the relay device is located, and the PLMN where the relay device is located and the HPLMN of the remote device are different networks. The PCF network element generates URSP information according to the information of the remote device, specifically including: the PCF network element generates URSP information according to the policy information of the remote device and the information of the remote device, wherein the policy information of the remote device is obtained by the PCF network element from the PCF network element of the HPLMN of the remote device.

[0065] In a possible implementation manner, the URSP information includes at least one of the following:

[0066] Session description information used for relay services and user session parameters.

[0067] The session description information for the relay service includes application identification, IP address information, Media Access Control Address (MAC) information, service type information, etc. The service type information includes relay service type information.

[0068] Among them, the user session parameters include data network name (DNN) information, S-NSSAI (Single Network Slice Selection Assistance Information) information, session type information, service path information, relay mode information, etc. The relay mode information includes layer 3 relay, layer 2 relay, N3IWF (Non-3GPP InterWorking Function) relay mode, etc.

[0069] Step 104: The PCF network element sends URSP information to the relay device.

[0070] In a possible implementation manner, the PCF network element sends the URSP information to the relay device, specifically including: the PCF network element sends a NAS message to the relay device, where the NAS message includes the URSP information.

[0071] Step 105: The relay device sends URSP information to the remote device.

[0072] In a possible implementation manner, the relay device sends the URSP information to the remote device, specifically including: the relay device sends a PC5-S message to the remote device, where the PC5-S message includes the URSP information.

[0073] In a possible implementation manner, the relay device receives URSP information sent by the PCF network element. The URSP information is contained in a transparent container. The relay device does not need to parse the content in the transparent container and directly forwards the URSP information to the remote device.

[0074] In a possible implementation, the relay device receives URSP information sent by the PCF network element, the URSP information is contained in a transparent container, the relay device reads the content in the transparent container, generates configuration information according to the URSP information, and sends the configuration information to the remote device, where the configuration information is used to indicate the URSP information.

[0075] Step 106: The remote device establishes a PDU session according to the URSP information.

[0076] In the data transmission method provided in this embodiment, the remote device sends the information of the remote device to the PCF network element of the core network through the relay device, the PCF network element generates URSP information according to the information of the remote device, and the PCF network element sends the URSP information to the remote device through the relay device, so that the remote device establishes a PDU session of the relay service according to the URSP information. The above method enables the remote device located outside the network coverage to connect to the network through the relay device, and establish a PDU session according to the URSP information sent by the network, thereby improving the data transmission efficiency.

[0077] Figure 5 An interactive schematic diagram of a data transmission method provided in an embodiment of the present application. Figure 4 The difference is that the relay device in this embodiment transmits data to the PCF network element through the AMF network element of the core network. Figure 5 As shown, the method provided in this embodiment includes the following steps:

[0078] Step 201: The remote device sends the information of the remote device to the relay device.

[0079] Step 202: The relay device sends the remote device information to the AMF network element.

[0080] In a possible implementation, the relay device sends the information of the remote device to the AMF network element, specifically including: the relay device sends a NAS message to the AMF network element, and the NAS message includes the information of the remote device.

[0081] Step 203: The AMF network element sends the remote device information to the PCF network element.

[0082] In a possible implementation, the AMF network element sends a NAS message to the PCF network element, where the NAS message includes information of the remote device.

[0083] Step 204: The PCF network element generates URSP information according to the information of the remote device.

[0084] Step 205: The PCF network element sends URSP information to the relay device.

[0085] Step 206: The relay device sends URSP information to the remote device.

[0086] Step 207: The remote device establishes a PDU session according to the URSP information.

[0087] Steps 201, 204 to 207 of this embodiment are the same as steps 101, 103 to 106 of the above embodiment. Please refer to the above embodiment for details, and no further details will be given here.

[0088] The data transmission method provided in this embodiment is that the remote device sends the information of the remote device to the PCF network element of the core network through the relay device, wherein the relay device sends the information of the remote device to the PCF network element through the AMF network element, the PCF network element generates URSP information according to the information of the remote device, and the PCF network element sends the URSP information to the remote device through the relay device, so that the remote device establishes a PDU session of the relay service according to the URSP information. The above method enables the remote device located outside the network coverage to connect to the network through the relay device, and establish a PDU session according to the URSP information sent by the network, thereby improving the data transmission efficiency.

[0089] Figure 6 An interactive schematic diagram of a data transmission method provided in an embodiment of the present application. Figure 4 The difference is that the relay device in this embodiment transmits data to the PCF network element through the SMF network element and the AMF network element of the core network. Figure 6 As shown, the method provided in this embodiment includes the following steps:

[0090] Step 301: The remote device sends the information of the remote device to the relay device.

[0091] Step 302: The relay device sends the remote device information to the AMF network element.

[0092] In a possible implementation, the relay device sends the information of the remote device to the AMF network element, specifically including: the relay device sends a NAS message to the AMF network element, and the NAS message includes the information of the remote device.

[0093] Step 303: The AMF network element sends the remote device information to the SMF network element.

[0094] In a possible implementation, after receiving the NAS message sent by the relay device, the AMF network element reads the information of the remote device in the NAS message and sends the information of the remote device to the SMF network element.

[0095] Step 304: The SMF network element sends the remote device information to the PCF network element.

[0096] Step 305: The PCF network element generates URSP information according to the information of the remote device.

[0097] Step 306: The PCF network element sends URSP information to the relay device.

[0098] Step 307: The relay device sends URSP information to the remote device.

[0099] Step 308: The remote device establishes a PDU session according to the URSP information.

[0100] Steps 301, 305 to 308 of this embodiment are the same as steps 101, 103 to 106 of the above embodiment. Please refer to the above embodiment for details, and will not be repeated here.

[0101] The data transmission method provided in this embodiment is that the remote device sends the information of the remote device to the PCF network element of the core network through the relay device, wherein the relay device sends the information of the remote device to the AMF network element of the core network, and then the AMF network element sends the information of the remote device to the SMF network element of the core network, and finally the SMF network element sends the information of the remote device to the PCF network element. The PCF network element generates URSP information based on the information of the remote device, and the PCF network element sends the URSP information to the remote device through the relay device, so that the remote device establishes a PDU session of the relay service according to the URSP information. The above method enables a remote device located outside the coverage of the network to connect to the network through the relay device, and establish a PDU session according to the URSP information sent by the network, thereby improving the efficiency of data transmission.

[0102] Figure 7 An interactive schematic diagram of a data transmission method provided in an embodiment of the present application. Figure 4 The difference is that the PCF network element of this embodiment includes a first PCF network element and a second PCF network element. The first PCF network element is a PCF network element of the PLMN where the relay device is located, and the second PCF network element is a PCF network element of the HPLMN of the remote device. The PLMN where the relay device is located and the HPLMN of the remote device are different networks. The data transmission method provided in this embodiment can be applied to Figure 2 In the scenario shown, the first PCF network element corresponds to Figure 2 PCF2 in the second PCF network element corresponds to Figure 2 PCF1 in.

[0103] like Figure 7 As shown, the method provided in this embodiment includes the following steps:

[0104] Step 401: The remote device sends the information of the remote device to the relay device.

[0105] Step 402: The relay device sends the information of the remote device to the first PCF network element.

[0106] Step 403: The first PCF network element obtains the policy information of the remote device from the second PCF network element.

[0107] Step 404: The first PCF network element generates URSP information according to the policy information of the remote device and the information of the remote device.

[0108] Step 405: The first PCF network element sends URSP information to the relay device.

[0109] Step 406: The relay device sends URSP information to the remote device.

[0110] Step 407: The remote device establishes a PDU session according to the URSP information.

[0111] In the data transmission method provided in this embodiment, the remote device sends the information of the remote device to the first PCF network element of the network where the relay device is located through the relay device, the first PCF network element obtains the policy information of the remote device from the second PCF network element of the HPLMN of the remote device, the first PCF network element generates URSP information according to the policy information of the remote device and the information of the remote device, and the first PCF network element sends the URSP information to the remote device through the relay device, so that the remote device establishes a PDU session of the relay service according to the URSP information. The above method enables the remote device located outside the network coverage to connect to the network where the relay device is located through the relay device, and establish a PDU session according to the URSP information sent by the network, thereby improving the data transmission efficiency.

[0112] The data transmission method provided in the embodiments of the present application is described in detail above. The network device, relay device and remote device provided in the embodiments of the present application will be described below.

[0113] Figure 8 A schematic diagram of the structure of a network device provided in an embodiment of the present application. Figure 8 As shown, the network device 500 provided in the embodiment of the present application includes:

[0114] The processing module 501 is used to generate user equipment routing selection policy URSP information, where the URSP information is used to indicate a session establishment policy for a relay service;

[0115] The sending module 502 is configured to send the URSP information to a remote device via a relay device.

[0116] Fig. 9 A schematic diagram of the structure of a network device provided in an embodiment of the present application. Figure 8 Based on the embodiment shown, Fig. 9 As shown, the network device 500 of this embodiment further includes: a receiving module 503.

[0117] The receiving module 503 is used to receive information from the remote device;

[0118] The processing module 501 is specifically configured to generate the URSP information according to the information of the remote device.

[0119] In a possible implementation manner, the receiving module 503 is specifically configured to receive the information of the remote device sent by the relay device.

[0120] In a possible implementation manner, the receiving module 503 is specifically configured to receive a non-access stratum NAS message sent by the relay device, where the NAS message includes information about the remote device.

[0121] In a possible implementation, the receiving module 503 is specifically configured to obtain the NAS message sent by the relay device from a mobility management function AMF network element.

[0122] In a possible implementation, the receiving module 503 is specifically configured to obtain the information of the remote device sent by the relay device from a session management function SMF network element.

[0123] In a possible implementation manner, the network device is a first PCF network element of a public land mobile network PLMN where the relay device is located, or a second PCF network element of a home public land mobile network HPLMN of the remote device.

[0124] In a possible implementation manner, if the network device is the first PCF network element, the receiving module 503 is further configured to obtain the policy information of the remote device from the second PCF network element;

[0125] Correspondingly, the processing module 501 is specifically configured to generate the URSP information according to the policy information of the remote device and the information of the remote device.

[0126] In a possible implementation manner, if the network device is the second PCF network element, the processing module 501 is specifically configured to generate the URSP information according to the local configuration information and the information of the remote device.

[0127] In a possible implementation, if the network device is the second PCF network element, the sending module 502 is specifically configured to send the URSP information to the remote device through the first PCF network element, and the first PCF network element is configured to send the URSP information to the remote device through the relay device.

[0128] In a possible implementation manner, the sending module 502 is specifically configured to send a NAS message to the relay device, where the NAS message includes the URSP information, and the relay device is configured to forward the URSP information to the remote device.

[0129] In a possible implementation, the sending module 502 is specifically configured to send the URSP information to the relay device, the relay device is configured to generate configuration information according to the URSP information, and send the configuration information to the remote device, the configuration information is used to indicate the URSP information.

[0130] The information of the remote device includes at least one of the following: an identifier of the remote device, an Internet Protocol IP address, and a port number.

[0131] The URSP information includes at least one of the following: service description information for relay services, and user session parameters.

[0132] The network device provided in the embodiment of the present application is used to perform the above Figures 4 to 7 The technical solution implemented by the PCF network element in the method embodiment shown has similar implementation principles and technical effects, which will not be repeated here.

[0133] Fig.10 A schematic diagram of the structure of a relay device provided in an embodiment of the present application. Fig.10 As shown, the relay device 600 provided in the embodiment of the present application includes:

[0134] A receiving module 601 is used to receive user equipment routing policy URSP information sent by a policy control function PCF network element, where the URSP information is used to indicate a session establishment policy for a relay service;

[0135] The sending module 602 is configured to send the URSP information to a remote device.

[0136] In a possible implementation manner, the receiving module 601 is specifically configured to receive a non-access stratum NAS message sent by the PCF network element, where the NAS message includes the URSP information.

[0137] In a possible implementation manner, the sending module 602 is further configured to:

[0138] Before the receiving module 601 receives the URSP information sent by the PCF network element, the information of the remote device is sent to the PCF network element.

[0139] In a possible implementation manner, the sending module 602 is specifically configured to send a NAS message to the PCF network element, where the NAS message includes information about the remote device.

[0140] In a possible implementation, the sending module 602 is specifically configured to send the NAS message to the PCF network element through a mobility management function AMF network element.

[0141] In a possible implementation, the sending module 602 is specifically configured to send the information of the remote device to the PCF network element through a session management function SMF network element.

[0142] Fig.11 A schematic diagram of the structure of a relay device provided in an embodiment of the present application. Fig.10 Based on the embodiment shown, Fig.11As shown, the relay device 600 of this embodiment further includes: a processing module 603.

[0143] The processing module 603 is used to generate configuration information according to the URSP information, where the configuration information is used to indicate the URSR information;

[0144] The sending module 602 is used to send the configuration information to the remote device.

[0145] The information of the remote device includes at least one of the following: an identifier of the remote device, an Internet Protocol IP address, and a port number.

[0146] The URSP information includes at least one of the following: service description information for relay services, and user session parameters.

[0147] The relay device provided in the embodiment of the present application is used to perform the above Figures 4 to 7 The technical solution implemented by the relay device in the illustrated method embodiment has similar implementation principles and technical effects, which will not be described in detail here.

[0148] Fig.12 This is a schematic diagram of the structure of a remote device provided in an embodiment of the present application. Fig.12 As shown, the remote device 700 provided in the embodiment of the present application includes:

[0149] A receiving module 701 is used to receive user equipment routing policy URSP information sent by a policy control function PCF network element, where the URSP information is used to indicate a session establishment policy for a relay service;

[0150] The processing module 702 is configured to establish a session according to the URSP information.

[0151] In a possible implementation manner, the receiving module 701 is specifically configured to receive the URSP information sent by the PCF network element through a relay device.

[0152] In a possible implementation, the receiving module 701 is specifically configured to receive configuration information sent by a relay device, where the configuration information is generated by the relay device according to the URSP information sent by the PCF network element, and the configuration information is used to indicate the URSP information.

[0153] Fig.13 A schematic diagram of the structure of a remote device provided in an embodiment of the present application. Fig.12 Based on the embodiment shown, Fig.13 As shown, the remote device 700 of this embodiment further includes: a sending module 703.

[0154] The sending module 703 is configured to send the information of the remote device to the PCF network element through a relay device before the receiving module 701 receives the URSP information sent by the PCF network element.

[0155] The information of the remote device includes at least one of the following: an identifier of the remote device, an Internet Protocol IP address, and a port number.

[0156] The URSP information includes at least one of the following: service description information for relay services, and user session parameters.

[0157] The remote device provided in the embodiment of the present application is used to execute the above Figures 4 to 7 The technical solution executed by the remote device in the method embodiment shown has similar implementation principles and technical effects, which will not be repeated here.

[0158] It should be noted that it should be understood that the division of the various modules of the above network equipment, relay equipment or remote equipment is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And these modules can all be implemented in the form of software calling through processing elements; they can also be all implemented in the form of hardware; some modules can also be implemented in the form of software calling through processing elements, and some modules can be implemented in the form of hardware. For example, the processing module can be a separately established processing element, or it can be integrated in a chip of the above-mentioned device. In addition, it can also be stored in the memory of the above-mentioned device in the form of program code, and called and executed by a processing element of the above-mentioned device. The implementation of other modules is similar. In addition, these modules can be fully or partially integrated together, or they can be implemented independently. The processing element described here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each module above can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software.

[0159] For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASIC), or one or more microprocessors (digital signal processors, DSP), or one or more field programmable gate arrays (FPGA), etc. For another example, when a module above is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0160] 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 may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may 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 may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0161] Fig.14 A schematic diagram of the hardware structure of a network device provided in an embodiment of the present application. Fig.14As shown, the network device 800 of this embodiment may include: a processor 801, a memory 802 and a communication interface 803. The memory 802 is used to store computer programs; the processor 801 is used to execute the computer program stored in the memory 802 to implement the method executed by the PCF network element in any of the above method embodiments. The communication interface 803 is used to perform data communication or signal communication with other devices.

[0162] The memory 802 may be independent or integrated with the processor 801. When the memory 802 is a device independent of the processor 801, the network device 800 may further include a bus 804 for connecting the memory 802 and the processor 801.

[0163] In one possible implementation, Figure 8 The processing module 501 in the embodiment can be integrated into the processor 801 and the sending module 502 can be integrated into the communication interface 803. Fig. 9 The processing module 501 in the embodiment can be integrated into the processor 801, and the sending module 502 and the receiving module 503 can be integrated into the communication interface 803. In a possible implementation, the processor 801 can be used to implement the signal processing operation of the network device in the above method embodiment, and the communication interface 803 can be used to implement the signal sending and receiving operation of the network device in the above method embodiment.

[0164] The network device provided in this embodiment can be used to execute the method executed by the PCF network element in any of the above method embodiments. Its implementation principle and technical effects are similar and will not be repeated here.

[0165] Fig.15 A schematic diagram of the hardware structure of a relay device provided in an embodiment of the present application. Fig.15 As shown, the relay device 900 of this embodiment may include: a processor 901, a memory 902, and a communication interface 903. The memory 902 is used to store computer programs; the processor 901 is used to execute the computer program stored in the memory 902 to implement the method executed by the relay device in any of the above method embodiments. The communication interface 903 is used to perform data communication or signal communication with other devices.

[0166] The memory 902 may be independent or integrated with the processor 901. When the memory 902 is a device independent of the processor 901, the relay device 900 may further include a bus 904 for connecting the memory 902 and the processor 901.

[0167] In one possible implementation, Fig.11The processing module 603 in the embodiment can be integrated into the processor 901, and the sending module 602 and the receiving module 601 can be integrated into the communication interface 903. In a possible implementation, the processor 901 can be used to implement the signal processing operation of the relay device in the above method embodiment, and the communication interface 903 can be used to implement the signal sending and receiving operation of the relay device in the above method embodiment.

[0168] The relay device provided in this embodiment can be used to execute the method executed by the relay device in any of the above method embodiments. The implementation principle and technical effects are similar and will not be described in detail here.

[0169] Fig.16 A schematic diagram of the hardware structure of a remote device provided in an embodiment of the present application. Fig.16 As shown, the remote device 1000 of this embodiment may include: a processor 1001, a memory 1002 and a communication interface 1003. The memory 1002 is used to store computer programs; the processor 1001 is used to execute the computer programs stored in the memory 1002 to implement the method executed by the remote device in any of the above method embodiments. The communication interface 1003 is used to perform data communication or signal communication with other devices.

[0170] Optionally, the memory 1002 may be independent or integrated with the processor 1001. When the memory 1002 is a device independent of the processor 1001, the remote device 1000 may further include: a bus 1004 for connecting the memory 1002 and the processor 1001.

[0171] In one possible implementation, Fig.12 The processing module 702 may be integrated into the processor 1001 and the receiving module 701 may be integrated into the communication interface 1003. Fig.13 The processing module 702 in the embodiment can be integrated into the processor 1001, and the sending module 703 and the receiving module 701 can be integrated into the communication interface 1003. In a possible implementation, the processor 1001 can be used to implement the signal processing operation of the remote device in the above method embodiment, and the communication interface 1003 can be used to implement the signal sending and receiving operation of the remote device in the above method embodiment.

[0172] The remote device provided in this embodiment can be used to execute the method executed by the remote device in any of the above method embodiments. The implementation principle and technical effects are similar and will not be described in detail here.

[0173] An embodiment of the present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the technical solution of the PCF network element in any of the aforementioned method embodiments.

[0174] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the technical solution of the relay device in any of the aforementioned method embodiments.

[0175] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the technical solution of the remote device in any of the aforementioned method embodiments.

[0176] The embodiment of the present application also provides a program, which, when executed by a processor, is used to execute the technical solution of the PCF network element in any of the aforementioned method embodiments.

[0177] The embodiment of the present application also provides a program, which, when executed by a processor, is used to execute the technical solution of the relay device in any of the aforementioned method embodiments.

[0178] The embodiment of the present application also provides a program, which, when executed by a processor, is used to execute the technical solution of the remote device in any of the aforementioned method embodiments.

[0179] An embodiment of the present application also provides a computer program product, including program instructions, which are used to implement the technical solution of the PCF network element in any of the aforementioned method embodiments.

[0180] The embodiment of the present application also provides a chip, including: a processing module and a communication interface, the processing module can execute the technical solution of the PCF network element in the aforementioned method embodiment. Further, the chip also includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module enables the processing module to execute the technical solution of the PCF network element.

[0181] An embodiment of the present application also provides a computer program product, including program instructions, which are used to implement the technical solution of the relay device in any of the aforementioned method embodiments.

[0182] The embodiment of the present application also provides a chip, including: a processing module and a communication interface, the processing module can execute the technical solution of the relay device in the aforementioned method embodiment. Further, the chip also includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module enables the processing module to execute the technical solution of the relay device.

[0183] An embodiment of the present application also provides a computer program product, including program instructions, which are used to implement the technical solution of the remote device in any of the aforementioned method embodiments.

[0184] The embodiment of the present application also provides a chip, including: a processing module and a communication interface, the processing module can execute the technical solution of the remote device in the aforementioned method embodiment. Further, the chip also includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module enables the processing module to execute the technical solution of the remote device.

[0185] In the present application, "at least two" means two or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0186] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0187] It can be understood that in the 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.

Claims

1. A data transmission method, characterized in that: include: The policy control function PCF network element generates user equipment routing policy URSP information, where the URSP information is used to indicate a session establishment policy for a relay service; The PCF network element sends the URSP information to the remote device through the relay device; The PCF network element sends the URSP information to the remote device through the relay device, including: The PCF network element sends the URSP information to the relay device, and the relay device is used to generate configuration information according to the URSP information and send the configuration information to the remote device, where the configuration information is used to indicate the URSP information.

2. The method according to claim 1, characterized in that The PCF network element generates the URSP information, including: The PCF network element receives information of the remote device; The PCF network element generates the URSP information according to the information of the remote device.

3. The method according to claim 2, characterized in that The PCF network element receives the information of the remote device, including: The PCF network element receives the information of the remote device sent by the relay device.

4. The method according to claim 2, characterized in that: The PCF network element receives the information of the remote device, including: The PCF network element receives a non-access layer NAS message sent by the relay device, where the NAS message includes information about the remote device.

5. The method according to claim 4, characterized in that The PCF network element receives a NAS message sent by the relay device, including: The PCF network element obtains the NAS message sent by the relay device from the mobility management function AMF network element.

6. The method according to claim 2, characterized in that The PCF network element receives the information of the remote device, including: The PCF network element obtains the information of the remote device sent by the relay device from the session management function SMF network element.

7. The method according to claim 1, characterized in that The PCF network element is a first PCF network element of a public land mobile network PLMN where the relay device is located, or a second PCF network element of a home public land mobile network HPLMN where the remote device is located.

8. The method according to claim 7, characterized in that If the PCF network element is the first PCF network element, the method further includes: The first PCF network element obtains the policy information of the remote device from the second PCF network element; Accordingly, the PCF network element generates the URSP information, including: The first PCF network element generates the URSP information according to the policy information of the remote device and the information of the remote device.

9. The method according to claim 7, characterized in that: If the PCF network element is the second PCF network element, the PCF network element generates the URSP information, including: The second PCF network element generates the URSP information according to the local configuration information and the information of the remote device.

10. The method according to claim 7, characterized in that If the PCF network element is the second PCF network element, the PCF network element sending the URSP information to the remote device through the relay device includes: The second PCF network element sends the URSP information to the remote device through the first PCF network element, and the first PCF network element is used to send the URSP information to the remote device through the relay device.

11. The method according to any one of claims 1 to 10, characterized in that The PCF network element sends the URSP information to the remote device through the relay device, including: The PCF network element sends a NAS message to the relay device, where the NAS message includes the URSP information, and the relay device is used to forward the URSP information to the remote device.

12. The method according to any one of claims 1 to 10, characterized in that The information of the remote device includes at least one of the following: an identifier of the remote device, an Internet Protocol IP address, and a port number.

13. The method according to any one of claims 1 to 10, characterized in that The URSP information includes at least one of the following: service description information for relay services, and user session parameters.

14. A data transmission method, characterized in that: include: The relay device receives the user equipment routing policy URSP information sent by the policy control function PCF network element, where the URSP information is used to indicate the session establishment policy of the relay service; The relay device sends the URSP information to the remote device; The relay device sending the URSP information to the remote device includes: The relay device generates configuration information according to the URSP information, where the configuration information is used to indicate the URSP information; The relay device sends the configuration information to the remote device.

15. The method according to claim 14, characterized in that The relay device receives the URSP information sent by the PCF network element, including: The relay device receives a non-access layer NAS message sent by the PCF network element, where the NAS message includes the URSP information.

16. The method according to claim 14, characterized in that Before the relay device receives the URSP information sent by the PCF network element, the method further includes: The relay device sends the information of the remote device to the PCF network element.

17. The method according to claim 16, characterized in that The relay device sends the information of the remote device to the PCF network element, including: The relay device sends a NAS message to the PCF network element, where the NAS message includes information about the remote device.

18. The method according to claim 17, characterized in that The relay device sends a NAS message to the PCF network element, including: The relay device sends the NAS message to the PCF network element through the mobility management function AMF network element.

19. The method according to claim 16, characterized in that The relay device sends the information of the remote device to the PCF network element, including: The relay device sends the information of the remote device to the PCF network element through the session management function SMF network element.

20. The method according to any one of claims 14 to 19, characterized in that The information of the remote device includes at least one of the following: an identifier of the remote device, an Internet Protocol IP address, and a port number.

21. The method according to any one of claims 14 to 19, characterized in that The URSP information includes at least one of the following: service description information for relay services, and user session parameters.

22. A data transmission method, characterized in that: include: The remote device receives the user equipment routing policy URSP information sent by the policy control function PCF network element, where the URSP information is used to indicate the session establishment policy of the relay service; The remote device establishes a session according to the URSP information; The remote device receives the URSP information sent by the PCF network element, including: The remote device receives the URSP information sent by the PCF network element through the relay device; The remote device receives configuration information sent by the relay device, the configuration information is generated by the relay device according to the URSP information sent by the PCF network element, and the configuration information is used to indicate the URSP information.

23. The method according to claim 22, characterized in that Before the remote device receives the URSP information sent by the PCF network element, the method further includes: The remote device sends the information of the remote device to the PCF network element through the relay device.

24. The method according to claim 22 or 23, characterized in that The information of the remote device includes at least one of the following: an identifier of the remote device, an Internet Protocol IP address, and a port number.

25. The method according to claim 22 or 23, characterized in that The URSP information includes at least one of the following: service description information for relay services, and user session parameters.

26. A network device, characterized in that: include: A processing module, used to generate user equipment routing selection policy URSP information, wherein the URSP information is used to indicate a session establishment policy for a relay service; A sending module, used for sending the URSP information to a remote device through a relay device; The sending module is specifically used to send the URSP information to the relay device, the relay device is used to generate configuration information according to the URSP information, and send the configuration information to the remote device, and the configuration information is used to indicate the URSP information.

27. The network device according to claim 26, characterized in that: The network device further comprises: a receiving module; the receiving module is used to receive information of the remote device; The processing module is specifically configured to generate the URSP information according to the information of the remote device.

28. The network device according to claim 27, characterized in that: The receiving module is specifically configured to receive the information of the remote device sent by the relay device.

29. The network device according to claim 27, characterized in that: The receiving module is specifically configured to receive a non-access layer NAS message sent by the relay device, wherein the NAS message includes information of the remote device.

30. The network device according to claim 29, characterized in that: The receiving module is specifically used to obtain the NAS message sent by the relay device from the mobility management function AMF network element.

31. The network device according to claim 27, characterized in that: The receiving module is specifically used to obtain the information of the remote device sent by the relay device from the session management function SMF network element.

32. The network device according to claim 26, characterized in that: The network device is a first PCF network element of a public land mobile network PLMN where the relay device is located, or a second PCF network element of a home public land mobile network HPLMN where the remote device is located.

33. The network device according to claim 32, characterized in that: If the network device is the first PCF network element, the receiving module is further used to obtain the policy information of the remote device from the second PCF network element; Correspondingly, the processing module is specifically configured to generate the URSP information according to the policy information of the remote device and the information of the remote device.

34. The network device according to claim 32, characterized in that: If the network device is the second PCF network element, the processing module is specifically configured to generate the URSP information according to the local configuration information and the information of the remote device.

35. The network device according to claim 32, characterized in that: If the network device is the second PCF network element, the sending module is specifically configured to send the URSP information to the remote device through the first PCF network element, and the first PCF network element is configured to send the URSP information to the remote device through the relay device.

36. The network device according to any one of claims 26 to 35, characterized in that: The sending module is specifically configured to send a NAS message to the relay device, where the NAS message includes the URSP information, and the relay device is configured to forward the URSP information to the remote device.

37. The network device according to any one of claims 26 to 35, characterized in that: The information of the remote device includes at least one of the following: an identifier of the remote device, an Internet Protocol IP address, and a port number.

38. The network device according to any one of claims 26 to 35, characterized in that: The URSP information includes at least one of the following: service description information for relay services, and user session parameters.

39. A relay device, characterized in that: include: A receiving module, used to receive user equipment routing selection policy URSP information sent by a policy control function PCF network element, wherein the URSP information is used to indicate a session establishment policy for a relay service; A processing module, configured to generate configuration information according to the URSP information; The sending module is used to send the configuration information to the remote device, where the configuration information is used to indicate the URSP information.

40. The relay device according to claim 39, characterized in that: The receiving module is specifically used to receive a non-access layer NAS message sent by the PCF network element, and the NAS message includes the URSP information.

41. The relay device according to claim 39, characterized in that: The sending module is further used for: Before the receiving module receives the URSP information sent by the PCF network element, the information of the remote device is sent to the PCF network element.

42. The relay device according to claim 41, characterized in that: The sending module is specifically used to send a NAS message to the PCF network element, and the NAS message includes information of the remote device.

43. The relay device according to claim 42, characterized in that: The sending module is specifically used to send the NAS message to the PCF network element through the mobility management function AMF network element.

44. The relay device according to claim 41, characterized in that: The sending module is specifically used to send the information of the remote device to the PCF network element through the session management function SMF network element.

45. The relay device according to any one of claims 39 to 44, characterized in that: The information of the remote device includes at least one of the following: an identifier of the remote device, an Internet Protocol IP address, and a port number.

46. ​​The relay device according to any one of claims 39 to 44, characterized in that: The URSP information includes at least one of the following: service description information for relay services, and user session parameters.

47. A remote device, characterized in that: include: A receiving module, used to receive user equipment routing selection policy URSP information sent by a policy control function PCF network element, wherein the URSP information is used to indicate a session establishment policy for a relay service; A processing module, configured to establish a session according to the URSP information; The receiving module is specifically used to receive the URSP information sent by the PCF network element through the relay device; the receiving module is specifically used to receive the configuration information sent by the relay device, the configuration information is generated by the relay device according to the URSP information sent by the PCF network element, and the configuration information is used to indicate the URSP information.

48. The remote device according to claim 47, characterized in that The remote device also includes: a sending module; The sending module is used to send the information of the remote device to the PCF network element through the relay device before the receiving module receives the URSP information sent by the PCF network element.

49. The remote device according to claim 47 or 48, characterized in that The information of the remote device includes at least one of the following: an identifier of the remote device, an Internet Protocol IP address, and a port number.

50. The remote device according to claim 47 or 48, characterized in that The URSP information includes at least one of the following: service description information for relay services, and user session parameters.

51. A network device, characterized in that: include: A memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the processor runs the computer program to execute the method according to any one of claims 1 to 13.

52. A relay device, characterized in that: include: A memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the processor runs the computer program to execute the method according to any one of claims 14 to 21.

53. A remote device, characterized in that: include: A memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the processor runs the computer program to execute the method as described in any one of claims 22-25.

54. A storage medium, characterized in that The storage medium comprises a computer program, and the computer program is used to implement the method according to any one of claims 1 to 13, or the method according to any one of claims 14 to 21, or the method according to any one of claims 22 to 25.

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