A communication method and device

Abstract

A communication method and device are used to enable the RAN side to provide the UE with communication configuration parameters for relay communication, so that the UE configures a PC5 link. The method is as follows: a terminal device sends first information to an access network device, the first information includes a first PC5 QoS parameter, and the first PC5 QoS parameter is used for relay communication of the terminal device; the access network device sends communication configuration parameters to the terminal device according to the first PC5 QoS parameter; the terminal device configures the PC5 link according to the communication configuration parameters. In this way, the access network device can provide the terminal device with communication configuration parameters for relay communication, so that the terminal device configures the PC5 link.

Description

[0001] This application claims priority to a Chinese patent application filed with the Chinese Patent Office on July 17, 2020, with application number 202010694722.7 and application name “A method and device for obtaining quality of service parameters in relay communication”, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0003] With the rapid development of mobile communications, the widespread use of new service types, such as video chat, VR / AR and other data services, has increased users' demand for bandwidth. Device-to-device (D2D) communication allows user equipment (UE) to communicate directly, and can share spectrum resources with cell users under the control of the cell network, effectively improving the utilization of spectrum resources. In D2D communication, UEs communicate through the proximity-based services communication 5 (ProSe) communication 5, PC5) interface, which can be used for information transmission on the data plane and control plane.

[0004] When the UE is outside the network coverage or the communication signal with the radio access network (RAN) is not good, the remote UE can be assisted by the relay UE, and the remote UE can communicate with the network server through the communication between the remote UE and the relay UE and the communication between the relay UE and the network server. By establishing a communication mode from the remote UE to the relay UE to the network, it is possible to expand support for the communication from the UE outside the network coverage to the network. The above-mentioned communication mode of the Remote UE accessing the network through the Relay UE can also be called indirect network communication or relay communication.

[0005] Currently, in relay communication, a PC5 link for relay communication needs to be established between the remote UE and the relay UE. How to obtain communication configuration parameters and communication resources for the PC5 link needs further study. Summary of the invention

[0006] The present application provides a communication method and apparatus for enabling a RAN side to obtain PC5 QoS parameters for relay communication during relay communication, so that the RAN side can provide a UE with communication configuration parameters for relay communication.

[0007] In a first aspect, the present application provides a communication method, which may include: an access network device receives first information from a terminal device, the first information includes a first PC5 QoS parameter, and the first PC5 QoS parameter is used for relay communication of the terminal device; the access network device sends communication configuration parameters to the terminal device based on the first PC5 QoS parameter.

[0008] Through the above method, the access network device can provide the terminal device with communication configuration parameters according to the first PC5 QoS parameter used for relay communication, so that the terminal device configures the PC5 link according to the communication configuration parameters.

[0009] In a possible design, the terminal device is a relay terminal device or a remote terminal device. In this way, both the remote terminal device and the relay terminal device can obtain the communication configuration parameters through the above method, and then configure the PC5 link.

[0010] In one possible design, before the access network device sends the communication configuration parameters to the terminal device based on the first PC5 QoS parameters, the access network device obtains the second PC5 QoS parameters of the terminal device, where the second PC5 QoS parameters are used for relay communication of the terminal device; the access network device authorizes the first PC5 QoS parameters based on the second PC5 QoS parameters.

[0011] Through the above method, the first PC5 QoS parameter provided by the terminal device can be authorized, so that the access network device can send communication configuration parameters to the terminal device according to the first PC5 QoS parameter.

[0012] In one possible design, the access network device obtains the second PC5 QoS parameter of the terminal device. The specific method may be: the access network device receives the second PC5 QoS parameter from the first device; or, the access network device receives the second PC5 QoS parameter and first indication information from the first device, and the first indication information is used to indicate that the second PC5 QoS parameter is used for relay communication.

[0013] Through the above method, the access network device can accurately obtain the second PC5 QoS parameter, so as to subsequently authorize the first PC5 QoS parameter.

[0014] In one possible design, the terminal device is a relay terminal device, and the access network device obtains the second PC5 QoS parameters of the terminal device. The specific method may be: the access network device receives a QoS configuration file and second indication information from a first device, and the second indication information is used to indicate that the second PC5 QoS parameters are determined according to the QoS configuration file; the access network device determines the second PC5 QoS parameters according to the QoS configuration file.

[0015] Through the above method, the access network device can accurately obtain the second PC5 QoS parameter, so as to subsequently authorize the first PC5 QoS parameter of the relay terminal device.

[0016] In a possible design, the access network device determines the second PC5 QoS parameter according to the QoS configuration file. The specific method may be: the access network device determines the second PC5 QoS parameter according to the QoS mapping relationship and the QoS parameters in the QoS configuration file, and the QoS mapping relationship is used to represent the mapping relationship between the QoS parameters and the PC5 QoS parameters. In this way, the access network device can accurately obtain the second PC5 QoS parameter so that the first PC5 QoS parameter can be authorized later.

[0017] In one possible design, the first device is a policy control function.

[0018] In one possible design, the first device is a session management function, and the terminal device is a relay terminal device.

[0019] In one possible design, the first information further includes third indication information, and the third indication information is used to indicate that the first PC5 QoS parameter is used for relay communication; or the first information further includes fourth indication information and identification information of the PC5 link, and the fourth indication information is used to indicate that the PC5 link is used for relay communication. In this way, it can be made clear that the first PC5 QoS parameter is used for relay communication.

[0020] In one possible design, the first information also includes identification information of the PC5 link; before the access network device receives the first information from the terminal device, the access network device receives second information from the terminal device, the second information includes fifth indication information and identification information of the PC5 link, and the fifth indication information is used to indicate that the PC5 link is used for relay communication. In this way, it can be made clear that the first PC5 QoS parameter is used for relay communication.

[0021] In one possible design, the terminal device is a remote terminal device, and the access network device receives the first information from the terminal device. The specific method may be: the access network device receives the first information from the terminal device via a relay terminal device. In this way, the remote terminal device can request the communication configuration parameters via the relay terminal device.

[0022] In a second aspect, the present application also provides a communication method, which may include: a first device obtains a second PC5 QoS parameter of a terminal device, where the second PC5 QoS parameter is used for relay communication of the terminal device; and the first device sends the second PC5 QoS parameter to an access network device.

[0023] Through the above method, the first device sends the second PC5 QoS parameter to the access network device, so that the access network device can authorize the PC5 QoS parameter used by the terminal device for relay communication according to the second PC5 QoS parameter.

[0024] In a possible design, the terminal device is a relay terminal device or a remote terminal device, so that both the remote terminal device and the relay terminal device can be authorized with PC5 QoS parameters later.

[0025] In one possible design, the first device sends a first indication message to the access network device, and the first indication message is used to indicate that the second PC5 QoS parameter is used for relay communication. In this way, the access network device can know that the second PC5 QoS parameter is used for relay communication, and then subsequently authorize the first PC5 QoS parameter of the terminal device according to the second PC5 QoS parameter.

[0026] In a possible design, the first device receives relay capability information from the terminal device; the first device sends the second PC5 QoS parameter to the access network device, and the specific method may be: the first device sends the second PC5 QoS parameter to the access network device according to the relay capability information. In this way, the access network device can successfully obtain the second PC5 QoS, and then the access network device subsequently authorizes the first PC5 QoS parameter of the terminal device according to the second PC5 QoS parameter.

[0027] In a possible design, the first device obtains the second PC5 QoS parameter of the terminal device, and the specific method may be: the first device receives the second PC5 QoS parameter from the policy control function; wherein the terminal device is a relay terminal device. In this way, the first device can accurately obtain the second PC5 QoS parameter.

[0028] In a possible design, the first device obtains the second PC5 QoS parameter of the terminal device, and the specific method may be: the first device receives the sixth indication information and the policy and charging control PCC rule from the policy control function, and the sixth indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS parameter in the PCC rule; the first device determines the second PC5 QoS parameter according to the QoS parameter in the PCC rule. In this way, the first device can accurately obtain the second PC5 QoS parameter.

[0029] In a possible design, the first device determines the second PC5 QoS parameter according to the QoS parameter in the PCC rule, and the specific method may be: the first device determines the QoS profile according to the QoS parameter in the PCC rule; the first device determines the second PC5 QoS parameter according to the QoS profile. In this way, the first device can accurately obtain the second PC5 QoS parameter.

[0030] In one possible design, the first device is a policy control function.

[0031] In one possible design, the first device is a session management function.

[0032] In the third aspect, the present application also provides a communication method, which may include: a session management function receives a policy and charging control PCC rule from a policy control function, and the PCC rule is used for a protocol data unit PDU session of a relay terminal device; the session management function determines a QoS profile based on a quality of service QoS parameter in the PCC rule; the session management function sends a second indication information and the QoS profile to an access network device, and the second indication information is used to indicate the determination of a second proximity service communication 5 PC5 QoS parameter based on the QoS profile, and the second PC5 QoS parameter is used for relay communication of the relay terminal device.

[0033] Through the above method, the access device can determine the second PC5 QoS parameter according to the QoS configuration file, and then the access network device can authorize the PC5 QoS parameter used by the terminal device for relay communication according to the second PC5 QoS parameter.

[0034] In one possible design, the session management function receives sixth indication information from the policy control function, and the sixth indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS parameter in the PCC rule; the session management function sends the second indication information to the access network device, and the specific method may be: the session management function sends the second indication information to the access network device according to the sixth indication information. In this way, the second indication information can be successfully sent to the access network device, so that the access network device can accurately determine the second PC5 QoS parameter.

[0035] In one possible design, the session management function receives the seventh indication information from the access and mobility management function, and the seventh indication information is used to indicate that the PDU session is used for relay communication; the session management function sends the second indication information to the access network device, and the specific method may be: the session management function sends the second indication information to the access network device according to the seventh indication information. In this way, the second indication information can be successfully sent to the access network device, so that the access network device can accurately determine the second PC5 QoS parameter.

[0036] In a fourth aspect, the present application also provides a communication method, which may include: a terminal device sends first information to an access network device, the first information includes a first PC5 QoS parameter, and the first PC5 QoS parameter is used for relay communication of the terminal device; the terminal device receives communication configuration parameters from the access network device; the terminal device configures the PC5 link according to the communication configuration parameters.

[0037] Through the above method, the terminal device can accurately obtain the communication configuration parameters, and then can accurately configure the PC5 link according to the communication configuration parameters, so as to successfully perform relay communication later.

[0038] In a possible design, the terminal device is a relay terminal device or a remote terminal device. In this way, both the remote terminal device and the relay terminal device can obtain the communication configuration parameters through the above method, and then configure the PC5 link.

[0039] In one possible design, before the terminal device sends the first information to the access network device, the terminal device receives the first PC5 QoS parameter from the first device, so that the terminal device can send the first PC5 QoS parameter to the access network device.

[0040] In one possible design, the terminal device receives eighth indication information from the first device, and the eighth indication information is used to indicate that the first PC5 QoS parameter is used for relay communication. In this way, the terminal device can clearly understand that the first PC5 QoS parameter is used for relay communication.

[0041] In one possible design, the first device is a policy control function or a session management function.

[0042] In one possible design, the first information further includes third indication information, and the third indication information is used to indicate that the first PC5 QoS parameter is used for relay communication; or the first information further includes fourth indication information and identification information of the PC5 link, and the fourth indication information is used to indicate that the PC5 link is used for relay communication. In this way, the terminal device can clearly understand that the first PC5 QoS parameter is used for relay communication.

[0043] In one possible design, the first information also includes identification information of the PC5 link; before the terminal device sends the first information to the access network device, the terminal device sends second information to the access network device, the second information includes fifth indication information and identification information of the PC5 link, and the fifth indication information is used to indicate that the PC5 link is used for relay communication. In this way, the access network device can clearly understand that the first PC5 QoS parameter is used for relay communication.

[0044] In a possible design, the terminal device is a remote terminal device, and the terminal device sends the first information to the access network device. The specific method may be: the terminal device sends the first information to the access network device through a relay terminal device. In this way, the access network device can obtain the request of the remote terminal device for the communication configuration parameters through the relay terminal device.

[0045] In a fifth aspect, the present application further provides a communication device, which may be an access network device, and the communication device has the function of implementing the access network device in the first aspect or each possible design example of the first aspect. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0046] In one possible design, the structure of the communication device may include a transceiver unit and a processing unit, which can perform the corresponding functions of the access network device in the above-mentioned first aspect or each possible design example of the first aspect. Please refer to the detailed description in the method example for details, which will not be repeated here.

[0047] In one possible design, the structure of the communication device includes a transceiver and a processor, and optionally also includes a memory, the transceiver is used to send and receive data, and is used to communicate and interact with other devices in the communication system, and the processor is configured to support the communication device to perform the corresponding functions of the access network device in the first aspect or each possible design example of the first aspect. The memory is coupled to the processor and stores program instructions and data necessary for the communication device.

[0048] In a sixth aspect, the present application further provides a communication device, which may be a first device, and the communication device has the function of implementing the first device in the second aspect or each possible design example of the second aspect. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0049] In one possible design, the structure of the communication device may include a transceiver unit and a processing unit, which can perform the corresponding functions of the first device in the above-mentioned second aspect or each possible design example of the second aspect. Please refer to the detailed description in the method example for details, which will not be repeated here.

[0050] In one possible design, the structure of the communication device includes a transceiver and a processor, and optionally also includes a memory, the transceiver is used to send and receive data, and is used to communicate and interact with other devices in the communication system, and the processor is configured to support the communication device to perform the corresponding functions of the first device in the above-mentioned second aspect or each possible design example of the second aspect. The memory is coupled to the processor and stores program instructions and data necessary for the communication device.

[0051] In a seventh aspect, the present application further provides a communication device, which may be a session management function, and the communication device has the function of implementing the session management function in the third aspect or each possible design example of the third aspect. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0052] In one possible design, the structure of the communication device may include a transceiver unit and a processing unit, which can perform the corresponding functions of the session management function in the above-mentioned third aspect or various possible design examples of the third aspect. Please refer to the detailed description in the method example for details, which will not be repeated here.

[0053] In one possible design, the structure of the communication device includes a transceiver and a processor, and optionally a memory, the transceiver is used to send and receive data, and to communicate and interact with other devices in the communication system, and the processor is configured to support the communication device to perform the corresponding functions of the session management function in the third aspect or each possible design example of the third aspect. The memory is coupled to the processor and stores program instructions and data necessary for the communication device.

[0054] In an eighth aspect, the present application further provides a communication device, which may be a terminal device, and which has the function of implementing the session management function in the fourth aspect or each possible design example of the fourth aspect. The function may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0055] In one possible design, the structure of the communication device may include a transceiver unit and a processing unit, which can perform the corresponding functions of the terminal device in the above-mentioned fourth aspect or each possible design example of the fourth aspect. Please refer to the detailed description in the method example for details, which will not be repeated here.

[0056] In one possible design, the structure of the communication device includes a transceiver and a processor, and optionally also includes a memory, the transceiver is used to send and receive data, and is used to communicate and interact with other devices in the communication system, and the processor is configured to support the communication device to perform the corresponding functions of the terminal device in the fourth aspect or each possible design example of the fourth aspect. The memory is coupled to the processor, and stores the necessary program instructions and data for the communication device.

[0057] In the ninth aspect, an embodiment of the present application provides a communication system, which may include the above-mentioned access network device, the first device (policy control function and / or session management function), and the terminal device, etc.

[0058] In the tenth aspect, a computer-readable storage medium provided by an embodiment of the present application stores program instructions, and when the program instructions are run on a computer, the computer executes the first aspect of the embodiment of the present application and any possible design thereof, the second aspect and any possible design thereof, the third aspect and any possible design thereof, or the fourth aspect and any possible design thereof. Exemplarily, the computer-readable storage medium can be any available medium that can be accessed by a computer. Taking this as an example but not limited to: a computer-readable medium can include a non-transient computer-readable medium, a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a CD-ROM or other optical disk storage, a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store a desired program code in the form of an instruction or data structure and can be accessed by a computer.

[0059] In the eleventh aspect, an embodiment of the present application provides a computer program product including computer program code or instructions, which, when running on a computer, enables the computer to implement the method of the above-mentioned first aspect and any possible design thereof, the second aspect and any possible design thereof, the third aspect and any possible design thereof, or the fourth aspect and any possible design thereof.

[0060] In the twelfth aspect, the present application also provides a chip, which is coupled to a memory and is used to read and execute program instructions stored in the memory to implement the method of the above-mentioned first aspect and any possible design thereof, the second aspect and any possible design thereof, the third aspect and any possible design thereof, or the fourth aspect and any possible design thereof.

[0061] For each of the above-mentioned aspects 5 to 12 and the technical effects that may be achieved by each of the aspects, please refer to the above-mentioned description of the technical effects that can be achieved by various possible schemes in the first, second, third or fourth aspects, and no further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 An architecture diagram of a communication system provided for this application;

[0063] Figure 2 A schematic diagram of an application scenario provided for this application;

[0064] Figure 3 A schematic diagram of a 5G QoS model based on QoS flow provided in this application;

[0065] Figure 4 A QoS model based on QoS flow in D2D communication provided by this application;

[0066] Figure 5 A schematic diagram of an application scenario provided for this application;

[0067] Figure 6 A flow chart of a communication method provided for this application;

[0068] Figure 7 A flow chart of another communication method provided by the present application;

[0069] Figure 8 A flow chart of another communication method provided by the present application;

[0070] Fig. 9 A flowchart of an example of a communication method provided by the present application;

[0071] Fig.10 A flowchart of another example of a communication method provided by the present application;

[0072] Fig.11 A flowchart of another example of a communication method provided by the present application;

[0073] Fig.12 A flowchart of another example of a communication method provided by the present application;

[0074] Fig.13 A schematic diagram of the structure of another communication device provided by the present application;

[0075] Fig.14 A structural diagram of another communication device provided by the present application;

[0076] Fig.15 A structural diagram of an access network device provided for this application. DETAILED DESCRIPTION

[0077] The present application will be described in further detail below in conjunction with the accompanying drawings.

[0078] The embodiment of the present application provides a communication method and device, which are used to enable the RAN side to obtain PC5 QoS parameters for relay communication during relay communication, so that the RAN side can provide the UE with communication configuration parameters for relay communication. The method and device described in the present application are based on the same technical concept. Since the principles of solving the problem by the method and device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0079] Below, some terms in this application are explained to facilitate understanding by those skilled in the art.

[0080] Remote UE: A UE that is connected to the network through indirect network communication. Relay UE: A UE that assists the Remote UE in accessing the network.

[0081] In the description of this application, words such as “first” and “second” are only used for the purpose of distinguishing the description and cannot be understood as indicating or implying relative importance or order.

[0082] An embodiment of the present application provides a possible communication system architecture applicable to the communication method. The architecture of the communication system may include: an access network and a core network. The access network is used to implement functions related to wireless access, and the access network includes access networks related to the 3rd generation partnership project (3GPP) and non-3GPP (non-3GPP access networks). The core network mainly includes the following key logical network elements: access and mobility management function network elements, session management function network elements, user plane function network elements, policy control function network elements, unified data management function network elements, etc. For example, Figure 1 A possible example of the architecture of the communication system is shown, and each network element or device in the architecture of the communication system is shown with a specific example. Specifically, Figure 1The architecture of the communication system shown may include: terminal equipment (taking user equipment (UE) as an example), access and mobility management function (AMF) network element, session management function (SMF) network element, user plane function (UPF) network element, policy control function (PCF) network element, unified data management function network element (UDM), authentication server function (AUSF) network element, network exposure function (NEF) network element, application function (AF) network element, network slice selection function (NSSF) network element, (radio) access network ((radio) access network, (R) AN) equipment, network storage function (network repository function, NRF) network element. Among them, the AMF network element and the access network device can be connected through the N2 interface, the access network device and the UPF can be connected through the N3 interface, the SMF and the UPF can be connected through the N4 interface, and the AMF network element and the UE can be connected through the N1 interface. The interface name is only an example, and the embodiment of the present application does not specifically limit this. It should be understood that the embodiment of the present application is not limited to Figure 1 The communication system shown, Figure 1 The names of the network elements shown in the figure are only used as an example and are not intended to limit the network elements included in the communication system architecture to which the communication method of the present application is applicable. The functions of each network element or device in the communication system are described in detail below:

[0083] Terminal device: It can be UE, handheld terminal, laptop, subscriber unit, cellular phone, smart phone, wireless data card, personal digital assistant (PDA) computer, tablet computer, wireless modem, handheld device, laptop computer, cordless phone or wireless local loop (WLL) station, machine type communication (MTC) terminal or other equipment that can access the network. The terminal device and the access network equipment communicate with each other using some air interface technology (such as new radio (NR), LTE). In vehicle networking communication, the communication terminal loaded on the vehicle is a terminal device, and the road side unit (RSU) can also be used as a terminal device. The drone carries a communication terminal and can be regarded as a terminal device.

[0084] (R)AN equipment: equipment that provides access for terminal devices, including RAN equipment and AN equipment. RAN equipment is mainly 3GPP network wireless network equipment, and AN can be non-3GPP defined access network equipment. RAN equipment: mainly responsible for wireless resource management, quality of service (QoS) management, data compression and encryption and other functions on the air interface side. The access network equipment may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, etc. In systems using different wireless access technologies, the names of devices with base station functions may be different. For example, in 5G systems, they are called RAN or gNB (5G NodeB), etc.

[0085] Access and mobility management function network element: mainly responsible for signaling processing, such as access control, mobility management, attachment and detachment, and gateway selection. When the AMF network element provides services for a session in a terminal device, it will provide control plane storage resources for the session to store the session identifier, the SMF network element identifier associated with the session identifier, etc. For example, in 5G, the access and mobility management function network element can be an AMF network element, such as Figure 1 As shown; in future communications, such as 6G, the access and mobility management function network element can still be an AMF network element, or have other names, which are not limited in this application. When the access and mobility management function network element is an AMF network element, the AMF can provide Namf services.

[0086] Session management function network element: mainly responsible for session management in mobile networks, such as session establishment, modification, and release. Specific functions include allocating IP addresses to users, selecting UPFs that provide message forwarding functions, etc. For example, in 5G, the session management function network element can be an SMF network element, such as Figure 1 As shown; in future communications, such as 6G, the session management function network element can still be an SMF network element, or have other names, which are not limited in this application. When the session management function network element is an SMF network element, the SMF can provide Nsmf services.

[0087] User plane function network element: responsible for forwarding and receiving user data in terminal devices. It can receive user data from the data network and transmit it to the terminal device through the access network device; the UPF network element can also receive user data from the terminal device through the access network device and forward it to the data network. The transmission resources and scheduling functions that provide services to the terminal device in the UPF network element are managed and controlled by the SMF network element. For example, in 5G, the user plane function network element can be a UPF network element, such as Figure 1 As shown; in future communications, such as 6G, the user plane function network element can still be a UPF network element, or have other names, which is not limited in this application.

[0088] Policy control function network element: mainly supports providing a unified policy framework to control network behavior, provides policy rules to the control layer network function, and is responsible for obtaining user subscription information related to policy decisions. For example, in 5G, the policy control function network element can be a PCF network element, such as Figure 1 As shown; in future communications, such as 6G, the policy control function network element can still be a PCF network element, or have other names, which are not limited in this application. When the policy control function network element is a PCF network element, the PCF network element can provide Npcf services.

[0089] Network open function network element: mainly supports the secure interaction between 3GPP network and third-party applications. For example, in 5G, the network open function network element can be a NEF network element, such as Figure 1 As shown; in future communications, such as 6G, the network open function network element can still be a NEF network element, or have other names, which are not limited in this application. When the network open function network element is a NEF, the NEF can provide Nnef services to other network function network elements.

[0090] Application function network element: mainly supports interaction with the 3GPP core network to provide services, such as influencing data routing decisions, policy control functions or providing some third-party services to the network side. For example, in 5G, the application function network element can be an AF network element, such as Figure 1As shown; in future communications, such as 6G, the application function network element can still be an AF network element, or have other names, which are not limited in this application. When the application function network element is an AF network element, the AF network element can provide Naf services.

[0091] Unified data management function network element: used to generate authentication credentials, user identity processing (such as storing and managing user permanent identities, etc.), access authorization control and contract data management, etc. For example, in 5G, the unified data management function network element can be a UDM network element, such as Figure 1 As shown; in future communications, such as 6G, the unified data management function network element can still be a UDM network element, or have other names, which are not limited in this application. When the unified data management function network element is a UDM network element, the UDM network element can provide Nudm services.

[0092] Authentication server function network element: used to support the authentication function when the UE accesses the network, and to support the authentication and authorization process specific to the network element slice. For example, in 5G, the authentication server function network element can be an AUSF network element, such as Figure 1 As shown; in future communications, such as 6G, the authentication server function network element can still be an AUSF network element, or have other names, which are not limited in this application. When the authentication server function network element is an AUSF network element, the AUSF network element can provide Nausf services.

[0093] The network slice selection function network element can be used to select the network slice that provides services to the terminal device. For example, in 5G, the network slice selection function network element can be an NSSF network element, such as Figure 1 As shown; in future communications, such as 6G, the network slice selection function network element may still be an NSSF network element, or have other names, which are not limited in this application. When the network slice selection function network element is an NSSF network element, the NSSF network element can provide Nnssf services.

[0094] The network storage function network element can be used to provide network element discovery function and provide network element information corresponding to the network element type based on the request of other network elements. NRF network elements also provide network element management services, such as network element registration, update, deregistration, and network element status subscription and push. For example, in 5G, the network storage function network element can be an NRF network element, such as Figure 1 As shown; in future communications, such as 6G, the network storage function network element can still be an NRF network element, or have other names, which are not limited in this application. When the network storage function network element is an NRF network element, the NRF network element can provide Nnrf services.

[0095] Data network (DN) refers to the service network that provides data transmission services to users, such as IP multi-media service (IMS) and the Internet.

[0096] The UE accesses the DN through a protocol data unit (PDU) session established between the UE and the DN.

[0097] Among them, each network element in the core network can also be called a functional entity or device, which can be a network element implemented on dedicated hardware, a software instance running on dedicated hardware, or an instance of a virtualized function on an appropriate platform. For example, the above-mentioned virtualization platform can be a cloud platform.

[0098] It should be noted that Figure 1 The architecture of the communication system shown is not limited to including only the network elements shown in the figure, but may also include other devices not shown in the figure, which will not be listed one by one in this application.

[0099] It should be noted that the embodiments of the present application do not limit the distribution form of each network element. Figure 1 The distribution form shown is only exemplary and is not limited in this application.

[0100] For the convenience of explanation, this application will be referred to as Figure 1 The network element shown in the figure is used as an example for explanation, and the XX network element is directly referred to as XX. It should be understood that the names of all network elements in this application are only examples, and they can also be called other names in future communications, or the network elements involved in this application can also be replaced by other entities or devices with the same functions in future communications, and this application does not limit this. A unified explanation is given here, and no further description will be given later.

[0101] It should be noted that Figure 1 The communication system shown does not constitute a limitation on the communication systems to which the embodiments of the present application can be applied. Figure 1 The communication system architecture shown is a 5G system architecture. Optionally, the method of the embodiment of the present application is also applicable to various future communication systems, such as 6G or other communication networks.

[0102] Figure 2A schematic diagram of an application scenario provided by the present application is shown, and the application scenario includes a remote terminal device (remote UE), a relay terminal device (relay UE), an access network device, a UPF, etc. The application scenario includes UE-Relay-Network communication, that is, the remote UE accesses the network through the relay UE. The communication mode in which the remote UE accesses the network through the relay UE can be called indirect network communication or relay communication. Relay communication is used in the following description, and relay communication can be understood as indirect network communication.

[0103] It should be noted that Figure 2 The application scenario shown is not limited to the network elements shown in the figure, but may also include other devices not shown in the figure, such as AMF, PCF, etc., which will not be listed one by one in this application.

[0104] In this application, PCF can be divided into access and mobility management (AM) PCF and session management function (SM) PCF. AM PCF is the PCF responsible for issuing UE policies and access control policies during UE access-related processes (such as registration process). SM PCF is the PCF responsible for issuing session-related policies during UE's PDU session-related processes (such as PDU session establishment process).

[0105] To facilitate understanding of the embodiments of the present application, the following describes the concepts and basic knowledge involved in the embodiments of the present application.

[0106] 1. 5G QoS Management

[0107] In order to ensure the end-to-end service quality of the 5G system, a 5G QoS model based on QoS flow is proposed, such as Figure 3 The 5G QoS model supports QoS flows with guaranteed bit rate (GBR QoS flow) and QoS flows without guaranteed bit rate (Non-GBR QoS flow). Data packets controlled by the same QoS flow receive the same transmission processing (such as scheduling, admission threshold, etc.).

[0108] For a UE, one or more PDU sessions can be established with the 5G network; one or more QoS flows can be established in each PDU session. Each QoS flow is identified by a QoS flow identifier (QFI), which uniquely identifies a QoS flow in the session.

[0109] Whether a QoS flow is a GBR QoS flow or a GBR QoS flow is determined by the corresponding QoS profile.

[0110] For GBR QoS flow, the corresponding QoS profile must contain the following QoS parameters: 5G QoS identifier (5GQoS identifier, 5QI), allocation and retention priority (ARP), guaranteed flow bit rate (GFBR) and maximum flow bit rate (MFBR). The optional QoS profile also contains QoS notification control (QNC). Depending on whether the QoS profile contains QNC, the GBR QoS flow is divided into GRB QoS flow that requires QNC and GBR QoS flow that does not require QNC. For GBR QoS flow that requires QNC, when RAN detects that the corresponding QoS flow resources cannot be met, RAN notifies SMF of the event and then notifies PCF. Further, SMF can initiate a QoS flow deletion or modification process.

[0111] For Non-GBR QoS flow, the corresponding QoS profile must contain the following QoS parameters: 5QI, ARP; the optional QoS profile also contains Reflective QoS Attribute (RQA).

[0112] The specific QoS parameters are defined as follows:

[0113] 5QI: is a scalar used to index the corresponding 5G QoS characteristics; 5QI is divided into standardized 5QI, pre-configured 5QI and dynamically allocated 5QI. For standardized 5QI, it corresponds one-to-one with a set of standardized 5G QoS characteristic values; for pre-configured 5QI, the corresponding 5G QoS characteristic values ​​are pre-configured in the access network node (AN); for dynamically allocated 5QI, the corresponding 5G QoS characteristics are included in the QoS configuration file and sent to AN. QoS characteristic values ​​include resource type (Resource Type, resource types are divided into GBR and Non-GBR), priority level, packet delay budget (packet delay budget, the delay of data packets from UE to UPF), packet error probability (packet error rate), maximum data burst volume (maximum data burst volume), averaging window (averaging window, used to calculate the rate corresponding to GBR).

[0114] ARP: includes priority, preemption capability, and preemption capability;

[0115] RQA: used to indicate that the services transmitted using the corresponding QoS flow use reverse QoS;

[0116] QNC: used to instruct the RAN whether to notify the network when the GFBR cannot be met during the use period of the QoS flow;

[0117] GFBR: represents the bit rate expected to be provided to the GBR QoS flow;

[0118] MFBR: Limits the bit rate provided to GBR QoS flow, that is, the maximum bit rate provided to GBR QoS flow. If the bit rate is exceeded, the data packet can be discarded.

[0119] The 5G network can execute the management process of QoS control through the signaling plane. The SMF binds the service data flow (SDF) to the QoS flow based on QoS and business requirements. SMF allocates the QFI of the new QoS flow to the SDF according to the local policy or the policy and charging control (PCC) rules sent by the PCF, and calculates the QoS Profile (QoS profile) and the corresponding packet detection rule (PDR) information. Among them, PCC rules include two types: dynamic PCC rules and predefined PCC rules. The dynamic PCC rules are provided to the SMF by the PCF, and the predefined PCC rules are configured on the SMF. The PCC rules include service data flow detection related, charging related and policy control related. Service data flow detection related includes service data flow template (SDF template, a data packet detected by a service data flow template in a PCC rule forms an SDF) and template priority. Policy control related information includes Gate status (service data flow can be passed or discarded), authorized QoS parameters (5QI, ARP, maximum bitrate, guaranteed bitrate, etc.), QNC, and Reflective QoS Control. Maximum bitrate is the maximum bit rate of the service data flow, and guaranteed bitrate is the guaranteed bit rate of the service data flow.

[0120] 2. D2D QoS Management

[0121] In 5G D2D communication, UE A can establish one or more PC5 links (PC5 link) with UE B, and each UE assigns a PC5 link identifier (PC5 link identifier) ​​to each link to identify the PC5 link. For a PC5 link between UE A and UE B, UE A and UE B use the same layer 2 identifier pair to exchange signaling messages and data transmission. The layer 2 identifier is divided into a source layer 2 identifier (source layer-2ID) and a destination layer 2 identifier (destination layer-2ID). The PC5 link can be used for direct communication between UEs, and can also be used for relay communication. In the relay communication scenario, the PC5 link between the RemoteUE and the Relay UE is called a PC5 link for relay communication. In the direct communication scenario between UEs, the PC5 link between UEs is called a PC5 link for direct communication between UEs.

[0122] It should be noted that in this application, the PC5 link can also be referred to as a PC5 connection or a PC5 link, and this application does not limit this.

[0123] In 5G D2D communication, a QoS model based on QoS flow is proposed. Figure 4 As shown, the QoS model is Figure 3 The 5G QoS model shown in Figure 1 is similar to that of Figure 1. One or more QoS flows can be established in each PC5 link. Each QoS flow is identified by a PC5 QoS flow identifier (PFI), which uniquely identifies a QoS flow in the link. D2D QoS supports GBR QoS flow and Non-GBR QoS flow.

[0124] PC5 QoS parameters include PQI (PC5 5QI), PC5 flow bit rate, and PC5 link aggregated bit rates. PQI is a special 5QI. Each PQI value corresponds to a QoS feature value. The content contained in the QoS feature value is the same as that involved in 5G QoS. PC5 flow bit rates include GFBR and MFBR.

[0125] For QoS management in D2D scenarios, the UE obtains the QoS mapping configuration from the PCF during the registration process, and the QoS mapping configuration is included in the UE policy. The QoS mapping configuration includes: 1) the correspondence between service type or service requirements (priority, reliability, latency, etc.) and PC5 QoS parameters (such as PQI, MFBR / GFBR, etc.); 2) the correspondence between PC5 QoS parameters and sidelink radio bearers (SLRBs). PC5 QoS parameters are PC5 QoS parameters authorized by the network. Configuration 1) is used for scenarios where the UE is in network service and not in network service, and configuration 2) is used for scenarios where the UE is not in network service. While providing the authorized PC5 QoS parameters to the UE, the PCF also sends the authorized PC5 QoS parameters to the RAN where the UE resides through the AMF. It is worth noting that the PC5 QoS parameters sent to the UE and the RAN are PC5 QoS parameters for direct communication between UEs. The PC5 QoS parameters used for direct communication between UEs can be understood as the PC5 QoS parameters used for the PC5 link for direct communication between UEs.

[0126] During the link establishment or link update process, UEs negotiate PC5 QoS parameter information and establish PC5 QoS flow. For each PC5 QoS flow, PC5 QoS flow information includes PFI and QoS parameter information corresponding to PFI. UE derives QoS rules to indicate the correspondence between service data packets and PFI. QoS rules include: QFI of the associated QoS flow, packet filter set, and priority. Packet filter sets are used in QoS rules and PDR to identify data flows. Priority determines the order in which QoS rules are used.

[0127] After the UE negotiates the PC5 QoS parameter information, the UE determines the communication configuration parameters corresponding to the PC5 QoS parameters and obtains the communication resources. Under the network service, the UE provides the PC5 QoS parameter information and link information (such as the PC5 link identifier or the destination layer 2 identifier) ​​to the RAN to obtain the communication configuration parameters and communication resources corresponding to the PC5 QoS parameters, and the RAN provides the corresponding communication configuration parameters to the UE, and the RAN provides the corresponding communication resources to the UE. The communication configuration parameters can be understood as access layer configuration parameters, such as sidelink radio bear (SLRB) configuration, radio link control (RLC) configuration and logical channel configuration. SLRB configuration includes sequence number and header compression parameters, etc. RLC configuration includes transparent mode, unacknowledged mode or acknowledged mode. Logical channel configuration includes logical channel priority, etc. RAN authorizes the PC5 QoS parameters provided by the UE based on the authorized PC5 QoS parameters obtained from the PCF, and provides communication configuration parameters and communication resources after the authorization is passed.

[0128] When the UE sends data, the UE maps the application layer data packet to the PFI according to the QoS Rule, obtains the corresponding QoS parameters according to the PFI, and then obtains the communication configuration parameters and communication resources from the RAN according to the QoS parameters, and then sends the corresponding data.

[0129] 3. The Remote UE needs to realize the uplink and downlink transmission of its own data through the PC5 link between the Remote UE and the Relay UE and the PDU session of the Relay UE. In the relay communication scenario, the PC5 link between the Remote UE and the Relay UE is called the PC5 link for relay communication. The end-to-end QoS requirements of the Remote UE can be divided into the PC5 QoS parameters for relay communication and the QoS parameters corresponding to the PDU session. The PC5 QoS parameters for relay communication can be understood as the PC5 QoS parameters used for the PC5 link for relay communication. The PC5 link and PDU session for relay communication both perform QoS processing based on the QoS flow model. The Relay UE can forward the data of the Remote UE based on the one-to-one mapping relationship between the QoS flow in the PC5 link for relay communication and the QoS flow in the Relay UE PDU session.

[0130] The QoS rules and QoS parameters corresponding to the QoS flow in the PDU session are determined by the SMF. The SMF provides the QoS rules and QoS parameters corresponding to the QoS flow to the Relay UE. The Relay UE converts the QoS parameters (such as 5QI, GFBR, MFBR, etc.) corresponding to the QoS flow in the PDU session into the corresponding PC5 QoS parameters (such as PQI, GFBR, MFBR, etc.) for relay communication. Since the PC5 link and PDU session for relay communication are both based on the QoS flow model for QoS processing, most QoS parameters at the QoS flow level can be used directly. For example, when the Relay UE obtains the GFBR corresponding to a QoS flow from the SMF, it also sets the GFBR to the GFBR of the corresponding QoS flow on the PC5 link for relay communication, so that the GFBR parameters of the QoS flow in the PC5 link for relay communication are consistent with the GFBR parameters of the corresponding QoS flow in the PDU session. The MFBR of the QoS flow on the PC5 link for relay communication is also set similarly. However, for the 5QI corresponding to the QoS flow in the PDU session, the Relay UE determines the value of the PQI based on the mapping relationship between the 5QI and the PQI. The mapping relationship may be pre-configured on the Relay UE.

[0131] At present, it has not been considered that the PC5 QoS parameters used for relay communication may be different from the PC5 QoS parameters used for direct communication between UEs, which may cause RAN authorization problems. For example, currently RAN only obtains PC5 QoS parameters used for direct communication between UEs, and there is no solution to obtain PC5 QoS parameters used for relay communication from the core network. Therefore, RAN cannot authorize PC5 QoS parameters used for relay communication, that is, it cannot provide communication configuration parameters and communication resources for relay communication. Specifically, Figure 5 The scenario diagram shown can clearly show that the PC5 QoS parameters used for relay communication are different from the PC5 QoS parameters used for direct communication between UEs. The end-to-end representation of direct communication between UEs is that the source of the data is UE1 (RemoteUE) and the destination of the data is UE2 (Relay UE). The end-to-end representation of relay communication of Remote UE is that the source of the data is Remote UE and the destination of the data is the server in the network. When the end-to-end delay is the same (10ms) in both cases, the delay (3ms) left for PC5 communication in the relay communication case is less than the delay for direct communication between UEs. It can also be understood that the PC5 QoS parameters (such as delay) used for relay communication will be more stringent than the PC5 QoS parameters (such as delay) for direct communication between UEs.

[0132] Based on this, the present application proposes a communication method for enabling the RAN side to obtain PC5 QoS parameters for relay communication during relay communication, so that the RAN side can authorize the PC5 QoS parameters for relay communication, thereby providing the UE with communication configuration parameters for relay communication.

[0133] In order to more clearly describe the technical solution of the embodiments of the present application, the communication method and device provided in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0134] A communication method provided in an embodiment of the present application is applicable to Figure 1 The communication system shown and Figure 2 See the application scenario shown in Figure 6 As shown, the specific process of the method may include:

[0135] Step 601: A terminal device sends first information to an access network device, where the first information includes a first PC5 QoS parameter, and the first PC5 QoS parameter is used for relay communication of the terminal device.

[0136] Step 602: The access network device sends communication configuration parameters to the terminal device according to the first PC5 QoS parameters.

[0137] Step 603: The terminal device configures the PC5 link according to the communication configuration parameters.

[0138] Specifically, the terminal device is a relay terminal device or a remote terminal device.

[0139] In an optional embodiment, the first information may be included in a first message, and the first message is a sidelink terminal information NR (SidelinkUEInformationNR) message, and the first message is used to report the information of the PC5 link of the terminal device. Alternatively, the first message is a sidelink configuration parameter request message, and the first message is used to request communication configuration parameters. Among them, the communication configuration parameters are configuration parameters for the PC5 link of the terminal device, and the PC5 link is used for relay communication. Exemplarily, the communication configuration parameters may be access layer configuration parameters, such as SLRB configuration, RLC configuration and logical channel configuration. SLRB configuration includes sequence number and header compression parameters, etc. RLC configuration includes transparent mode, non-confirmation mode or confirmation mode. Logical channel configuration includes logical channel priority, etc.

[0140] In an optional implementation, before the access network device sends the communication configuration parameter to the terminal device according to the first PC5 QoS parameter, the access network device obtains the second PC5 QoS parameter of the terminal device, and the second PC5 QoS parameter is used for the relay communication of the terminal device; the access network device authorizes the first PC5 QoS parameter according to the second PC5 QoS parameter. The second PC5 QoS parameter is the QoS parameter used by the terminal device for relay communication or the QoS parameter authorized by the network for the terminal device for relay communication. The first PC5 QoS parameter may include PQI, MFBR, GFBR, etc. The second PC5 QoS parameter may include PQI, MFBR, GFBR, etc.

[0141] Specifically, according to different actual scenarios, when the access network device obtains the second PC5 QoS parameter of the terminal device, the following methods may be specifically included:

[0142] Method a1: the access network device receives the second PC5 QoS parameter from the first device; or, the access network device receives the second PC5 QoS parameter and first indication information from the first device, wherein the first indication information is used to indicate that the second PC5 QoS parameter is used for relay communication.

[0143] Specifically, the second PC5 QoS parameter and the first indication information may be carried in one message.

[0144] In the method a1, the first device is a policy control function; or, the first device is a session management function. In the case where the first device is a policy control function, the access network device receives the second PC5 QoS parameter and the first indication information from the policy control function through the access and mobility management function, and the terminal device is a relay terminal device or a remote terminal device. In the case where the first device is a session management function, the access network device receives the second PC5 QoS parameter and the first indication information from the session management function through the access and mobility management function, and the terminal device is a relay terminal device.

[0145] Method a2: The access network device receives a QoS configuration file and second indication information from a first device, wherein the second indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS configuration file; and then the access network device determines the second PC5 QoS parameter according to the QoS configuration file.

[0146] In the method a2, the first device is a session management function, and the terminal device is a relay terminal device. The access network device receives the QoS configuration file and the second indication information from the session management function through the access and mobility management function.

[0147] Specifically, the access network device determines the second PC5 QoS parameter according to the QoS configuration file. The specific method may be: the access network device determines the second PC5 QoS parameter according to the QoS mapping relationship and the QoS parameters in the QoS configuration file, and the QoS mapping relationship is used to represent the mapping relationship between the QoS parameters in the QoS configuration file and the PC5 QoS parameters. The QoS parameters in the QoS configuration file may include 5QI, GFBR, MFBR, etc. The QoS mapping relationship includes the mapping relationship between the QoS parameter 5QI in the QoS configuration file and the PC5 QoS parameter PQI, the mapping relationship between the QoS parameter GFBR in the QoS configuration file and the PC5 QoS parameter GFBR, the mapping relationship between the QoS parameter MFBR in the QoS configuration file and the PC5 QoS parameter MFBR, etc. For example, the mapping relationship between 5QI and PQI may be that 5QI=10 is mapped to PQI=20, and the mapping relationship between GFBR and MFBR may be that the values ​​are equal.

[0148] In an optional implementation, the first information further includes third indication information, and the third indication information is used to indicate that the first PC5 QoS parameter is used for relay communication; or, the first information further includes fourth indication information and identification information of the PC5 link, and the fourth indication information is used to indicate that the PC5 link is used for relay communication.

[0149] In an optional implementation, the first information also includes identification information of the PC5 link; further, before the access network device receives the first information from the terminal device, the access network device receives second information from the terminal device, the second information includes fifth indication information and identification information of the PC5 link, and the fifth indication information is used to indicate that the PC5 link is used for relay communication.

[0150] In an optional implementation, when the terminal device is a remote terminal device, the remote terminal device sends the second information to the access network device through a relay terminal device.

[0151] In a specific implementation, when the terminal device is a remote terminal device, the access network device receives the first information from the terminal device, which may be: the access network device receives the first information from the terminal device via a relay terminal device. That is, the terminal device sends the first information to the access network device via the relay terminal device.

[0152] In an optional implementation, before the terminal device sends the first information to the access network device, the terminal device receives the first PC5 QoS parameter from a first device.

[0153] Optionally, the terminal device further receives eighth indication information from the first device, where the eighth indication information is used to indicate that the first PC5 QoS parameter is used for relay communication.

[0154] In an optional implementation, the access network device further sends PC5 communication resources to the terminal device according to the first PC5 QoS.

[0155] By adopting the communication method provided in the present application, the access network device can provide the terminal device with communication configuration parameters according to the first PC5 QoS parameter used for relay communication, so that the terminal device configures the PC5 link according to the communication configuration parameters.

[0156] The present application also provides a communication method suitable for: Figure 1 The communication system shown and Figure 2 See the application scenario shown in Figure 7 As shown, the specific process of the method may include:

[0157] Step 701: The first device obtains a second PC5 QoS parameter of a terminal device, where the second PC5 QoS parameter is used for relay communication of the terminal device.

[0158] Step 702: The first device sends the second PC5 QoS parameter to the access network device.

[0159] Specifically, the terminal device is a relay terminal device or a remote terminal device.

[0160] In an optional implementation manner, the first device sends first indication information to the access network device, wherein the first indication information is used to indicate that the second PC5 QoS parameter is used for relay communication. In this case, the first device is a policy control function or a session management function.

[0161] In an exemplary embodiment, the first device receives relay capability information from the terminal device; further, the first device sends the second PC5 QoS parameter to the access network device, and the specific method may be: the first device sends the second PC5 QoS parameter to the access network device according to the relay capability information. At this time, the first device is a policy control function. The relay capability information may be sent by the terminal device to the first device through a non-access stratum (NAS) message during the registration process of the terminal device.

[0162] In one example, the first device obtains the second PC5 QoS parameter of the terminal device, and the specific method may be: the first device receives the second PC5 QoS parameter from the policy control function; wherein, in this case, the terminal device is a relay terminal device. At this time, the first device is a session management function.

[0163] In another example, the first device obtains the second PC5 QoS parameter of the terminal device, and the specific method may be: the first device receives the sixth indication information and the PCC rule from the policy control function, and the sixth indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS parameter in the PCC rule; the first device determines the second PC5 QoS parameter according to the QoS parameter in the PCC rule. In this case, the first device is a session management function.

[0164] Specifically, the first device determines the second PC5 QoS parameter according to the QoS parameter in the PCC rule, and the specific method may be: the first device determines the QoS profile according to the QoS parameter in the PCC rule; the first device determines the second PC5 QoS parameter according to the QoS profile. At this time, the first device is a session management function.

[0165] Specifically, after the access network device receives the second PC5 QoS parameter, the access network device authorizes the first PC5 QoS parameter received by the access network device from the terminal device according to the second PC5 QoS parameter. Figure 6 The illustrated embodiments involve related descriptions.

[0166] By adopting the communication method provided in the embodiment of the present application, the second PC5QoS parameter is sent to the access network device through the first device, so that the access network device can authorize the PC5QoS parameter used by the terminal device for relay communication according to the second PC5 QoS parameter.

[0167] The present application also provides a communication method suitable for: Figure 1 The communication system shown and Figure 2 See the application scenario shown in Figure 8 As shown, the specific process of the method may include:

[0168] Step 801: The session management function receives a policy and charging control (PCC) rule from the policy control function, where the PCC rule is used to relay a PDU session of a terminal device.

[0169] Step 802: The session management function determines a QoS profile according to the quality of service QoS parameters in the PCC rule.

[0170] Step 803: The session management function sends second indication information and the QoS profile to the access network device, wherein the second indication information is used to indicate that a second PC5 QoS parameter is determined according to the QoS profile, and the second PC5 QoS parameter is used for relay communication of the relay terminal device.

[0171] In an optional implementation, the session management function receives sixth indication information from the policy control function, and the sixth indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS parameter in the PCC rule; further, the session management function sends the second indication information to the access network device, and the specific method may be: the session management function sends the second indication information to the access network device according to the sixth indication information.

[0172] In another optional implementation, the session management function receives seventh indication information from the access and mobility management function, and the seventh indication information is used to indicate that the PDU session is used for relay communication; further, the session management function sends second indication information to the access network device. The specific method may be: the session management function sends the second indication information to the access network device according to the seventh indication information.

[0173] Specifically, after receiving the QoS configuration file, the access network device determines the second PC5 QoS parameter according to the QoS configuration file, and then the access network device authorizes the first PC5 QoS parameter received by the access network device from the terminal device according to the second PC5 QoS parameter. Figure 6 The illustrated embodiments involve related descriptions.

[0174] By adopting the communication method provided in the embodiment of the present application, the subsequent access device can determine the second PC5 QoS parameter according to the QoS configuration file, and then enable the access network device to authorize the PC5 QoS parameter for the terminal device for relay communication according to the second PC5 QoS parameter.

[0175] Based on the above embodiments, Figure 9-12 The example shown is used to explain the communication method provided by the present application in detail. In the following example, the terminal device is UE, the access network device is RAN, the session management function is SMF, and the policy control function is PCF.

[0176] Fig. 9 An example of a communication method provided by the present application is shown. In this example, the PCF provides the PC5 QoS parameters for relay communication to the UE and the RAN. When the UE requests the RAN to obtain the communication configuration parameters or communication resources corresponding to the PC5 QoS parameters, it indicates that the PC5 link corresponding to the PC5 QoS parameters is used for relay communication. The UE can be a remote UE (Remote UE) or a relay UE (Relay UE). The Remote UE resides in RAN1, and the Relay UE resides in RAN2. RAN1 and RAN2 can be the same RAN or different RANs. Specifically, the process of this example can be:

[0177] Step 901: During the Remote UE registration process, the Remote UE sends a NAS message to the AM PCF through the AMF. The NAS message includes relay capability information, which may also be relay access capability information.

[0178] Step 902: After the AM PCF obtains the subscription information of the Remote UE from the UDR, the AM PCF sends a second PC5 QoS parameter (Authorized PC5 QoS parameter) to RAN 1 according to the relay capability information.

[0179] Specifically, the AM PCF further sends first indication information (for relaying indication) to the RAN 1.

[0180] The AM PCF may send a registration response message to the RAN 1 through the AMF, where the registration response message includes the second PC5 QoS parameter and the first indication information.

[0181] After receiving the Authorized PC5 QoS parameter and the for relaying indication, the RAN1 stores the Authorized PC5 QoS parameter and the for relaying indication in the context of the Remote UE.

[0182] Among them, Authorized PC5 QoS parameter represents the PC5 QoS parameter authorized by the Remote UE, which is used for relay communication of the terminal device; for relaying indicates that the authorized PC5 QoS parameter is used for relay communication or the PC5 link corresponding to the authorized PC5 QoS parameter is used for relay communication.

[0183] In addition, optionally, the AM PCF also sends the correspondence between the service type or service requirement (such as priority, reliability, latency, etc.) used for relay communication and the Authorized PC5 QoS parameter (here considered to be the first PC5 QoS parameter) to the Remote UE through the AMF. The Remote UE uses the correspondence to determine the PC5 QoS parameter corresponding to the service of the relay communication.

[0184] Step 903-Step 904: The registration process of the Relay UE is similar to the registration process of the Remote UE, and the details can be referred to the relevant descriptions in Step 901 and Step 902, which will not be described in detail here. The RAN corresponding to the Relay UE is RAN2.

[0185] Step 905: The Remote UE establishes a PC5 link with the Relay UE, where the PC5 link is used for relay communication.

[0186] Specifically, the Remote UE and the Relay UE determine the PC5 QoS parameters corresponding to the service of the relay communication according to the correspondence between the service type or service requirement (such as priority, reliability, delay, etc.) of the relay communication and the Authorized PC5 QoS parameter. The Remote UE negotiates with the Relay UE the PC5 QoS parameters corresponding to the transmission service under the relay communication.

[0187] Step 906: The Relay UE establishes a PDU session.

[0188] Afterwards, the Relay UE requests the RAN to obtain the communication configuration parameters or communication resources corresponding to the PC5 QoS parameters, which may include the following steps 907a and 907b.

[0189] Step 907a: includes step 907a-1 and step 907a-2.

[0190] Step 907a-1: After the Relay UE establishes the PC5 link, it sends an RRC message to RAN 2, wherein the RRC message includes second information, wherein the second information includes fifth indication information (relay indication) and identification information of the PC5 link (that is, PC5 link information link info), and the fifth indication information is used to indicate that the PC5 link is used for relay communication. The identification information of the PC5 link may be a destination layer 2 identifier of the PC5 link. The RRC message is a sidelink terminal information NR message. Alternatively, the first message is a sidelink configuration parameter request message.

[0191] Step 907a-2: The Relay UE sends a request message (i.e., the first message) to RAN 2, wherein the request message is used to request communication configuration parameters or communication resources, and the request message includes the first information involved, wherein the first information includes the first PC5 QoS parameter and the PC5 link identification information. The request message is a sidelink terminal information NR message or a sidelink configuration parameter request message.

[0192] Step 907b: When the Relay UE requests RAN 2 to obtain the communication configuration parameters or communication resources corresponding to the PC5 QoS parameter, the Relay UE sends first information to the RAN 2, wherein the first information includes the first PC5 QoS parameter and third indication information, and the third indication information is used to indicate that the first PC5 QoS parameter is used for relay communication; or the first information includes the first PC5 QoS parameter, fourth indication information and identification information of the PC5 link, and the fourth indication information is used to indicate that the PC5 link is used for relay communication. The first information is carried in the request message of the Relay UE requesting the communication configuration parameters or communication resources from RAN 2.

[0193] Step 908: The RAN 2 authorizes the first PC5 QoS parameters according to the second PC5 QoS parameters (the authorized PC5 QoS parameters in step 904) (ie, authorizes the first PC5 QoS parameters).

[0194] Step 909: After the authorization in step 908 is passed, the RAN 2 sends communication configuration parameters to the Relay UE according to the first PC5 QoS parameters, and the communication configuration parameters are used for relay communication.

[0195] In addition, the RAN 2 also sends communication resources for relay communication to the Relay UE.

[0196] Specifically, the process of the Remote UE requesting the RAN 1 to obtain the communication configuration parameters or communication resources corresponding to the PC5 QoS parameters is similar to the request process of the Relay UE in steps 907a-909, and can be referred to each other, and will not be described in detail here. Fig. 9 It is no longer shown.

[0197] Through the above example, RAN can perceive PC5 QoS parameters used for direct communication between UEs and PC5 QoS parameters used for relay communication, and can authorize communication configuration parameters in the two cases or PC5 QoS parameters in the communication resource request process respectively.

[0198] Fig.10An example of another communication method provided by the present application is shown. In this example, RAN1 (the RAN where the Remote UE resides) and RAN2 (the RAN where the Relay UE resides) respectively obtain PC5 QoS parameters for relay communication from the core network. The Remote UE and the Relay UE respectively request the RAN where they reside to obtain the communication configuration parameters or communication resources corresponding to the PC5 QoS parameters for relay communication. The Remote UE resides in RAN1, the Relay UE resides in RAN2, and RAN1 and RAN2 may also be the same. Specifically, the process of this example can be:

[0199] Step 1001: The Remote UE establishes a PC5 link with the Relay UE.

[0200] Step 1002: The Relay UE establishes a PDU session. After the PDU session is established, the Relay UE reports the Remote UE information to the SMF through the AMF. The Remote UE information includes the Remote UE identification information and the Remote UE address information. The SMF reports the Remote UE information to the SM PCF.

[0201] Step 1003: The SM PCF senses that the service data flow requested by the AF is for the Remote UE, and determines the PCC rules and the PC5 QoS parameters (ie, the second PC5 QoS parameters) for relay communication.

[0202] Specifically, the SM PCF determines that the target UE requested by the AF is the Remote UE according to the address information provided by the AF and the Remote UE address information obtained from the SMF. The PCF generates the PCC rule and the second PC5 QoS parameter according to the service requirements requested by the AF.

[0203] Step 1004: The SM PCF sends the second PC5 QoS parameter and PCC rule (Rule) to the SMF.

[0204] Step 1005: The SMF sends the second PC5 QoS parameter to RAN2, where the second PC5 QoS parameter is used for relay communication of the Relay UE.

[0205] Specifically, the second PC5 QoS parameter is also used to authorize the PC5 QoS parameter (ie, the first PC5 QoS parameter) for relay communication requested by the Relay UE.

[0206] The SMF may send the second PC5 QoS parameter to the RAN2 through N2 SM information (info). Specifically: Mode 1: When the SMF receives the PCC Rule and the second PC5 QoS parameter from the SM PCF, the SMF puts the second PC5 QoS parameter into the N2 SM info; Mode 2: When the SMF obtains the PDU session for relaying information from the AMF and receives the second PC5 QoS parameter from the SM PCF, the SMF puts the second PC5 QoS parameter into the N2 SM info.

[0207] Optionally, the SMF further sends first indication information (for relaying indication) to the RAN 2, where the first indication information is used to indicate that the second PC5 QoS parameter is used for relay communication.

[0208] Afterwards, the RAN 2 stores the second PC5 QoS parameter for Relay UE relay communication obtained from the SMF.

[0209] Step 1006: The SMF sends the second PC5 QoS parameter to the Relay UE and the Remote UE.

[0210] The SMF sends the second PC5 QoS parameter to the Relay UE through the AMF, and the Relay UE sends the second PC5 QoS parameter to the Remote UE through the PC5 link.

[0211] Step 1007: The SM PCF sends a first update message to the UDR, where the first update message includes identification information of the RemoteUE, a second PC5 QoS parameter, and indication information for relaying communication (first indication information).

[0212] Through step 1007, the second PC5 QoS parameter can be updated to the UDR, that is, the subscription data of the Remote UE is updated.

[0213] Step 1008: The UDR sends a second update message to the RAN 1 through the AM PCF, where the second update message includes identification information of the Remote UE, second PC5 QoS parameters, and indication information for relay communication (first indication information).

[0214] The UDR can trigger the AM PCF to update the context of the Remote UE in RAN 1, that is, update the PC5 QoS parameters used by the Remote UE for relay communication through step 1008. Afterwards, RAN 1 stores the second PC5 QoS parameters used for the Remote UE relay communication.

[0215] Steps 1009a to 1011 are the same as above. Fig. 9 Steps 907a to 909 are the same and can be referred to each other, and will not be repeated here.

[0216] Similarly, the process of the Remote UE requesting the RAN 1 to obtain the communication configuration parameters or communication resources corresponding to the PC5 QoS parameters is similar to the request process of the Relay UE in step 1009a-step 1011, and can refer to each other, and will not be described in detail here. Fig.10 It is no longer shown.

[0217] Through the above example, RAN can obtain PC5 QoS parameters for relay communication between Remote UE and Relay UE from the core network, and can authorize PC5 QoS parameters for relay communication when Remote UE and Relay UE request communication configuration parameters or communication resources.

[0218] Fig.11 An example of another communication method provided by the present application is shown. Fig.10 The difference of the example shown is that only RAN 2 (the RAN where the Relay UE resides) obtains the PC5 QoS parameters for relay communication from the core network. The Relay UE assists the Remote UE in requesting the communication configuration parameters or communication resources corresponding to the PC5 QoS parameters for relay communication from RAN 2. Specifically, the process of this example can be:

[0219] Steps 1101-1106 and Fig.10 In the illustrated embodiment, steps 1001 - 1006 are the same and can refer to each other, and will not be repeated here.

[0220] The process in which the Relay UE requests the communication configuration parameters or communication resources corresponding to the PC5 QoS parameters of the relay communication from the RAN 2 is similar to Fig. 9 Steps 907a to 909 in the embodiment shown are the same and will not be repeated here. Fig.11 No longer shown.

[0221] The process of the Remote UE requesting the RAN 2 for the communication configuration or communication resources corresponding to the PC5 QoS parameter of the relay communication may include the following steps 1107-1109:

[0222] Step 1107: The Remote UE sends first information to the RAN 2 through the Relay UE.

[0223] Specifically, the step 1107 may include the following steps 1107a and 1107b:

[0224] Step 1107a: The Remote UE sends a first request message to the Relay UE, wherein the first request message includes the first information, and the first information includes a first PC5 QoS parameter and PC5 link identification information. The first request message may be a PC5-Signalling (PC5-S) message.

[0225] Step 1107b: The Relay UE sends a second request message to the RAN 2, wherein the second request message includes the first information, and the first information includes the first PC5 QoS parameter and PC5 link identification information. The second request message may also include indication information, and the indication information indicates that the first information comes from the Remote UE. Specifically, the indication information may be Remote UE ID information.

[0226] Optionally, the first information may also include a relay indication, where the relay indication indicates that the PC5 link is used for relay communication.

[0227] Step 1108 : The RAN 2 authorizes the first PC5 QoS parameter according to the second PC5 QoS parameter obtained in step 1105 .

[0228] Step 1109: the RAN 2 sends communication configuration parameters (or communication resources) to the Remote UE through the Relay UE.

[0229] Specifically, the RAN 2 sends a communication configuration parameter to the Relay UE according to the first PC5 QoS parameter (may be sent through a first response message), and then the Relay UE forwards the communication configuration parameter to the Remote UE (may be forwarded through a second response message).

[0230] Through the above example, RAN can obtain PC5 QoS parameters for relay communication between Remote UE and Relay UE from the core network, and can authorize PC5 QoS parameters for relay communication when Remote UE and Relay UE request communication configuration parameters or communication resources.

[0231] Fig.12 An example of another communication method provided by the present application is shown. In this example, the RAN generates PC5 QoS parameters for relay communication according to the forrelaying indication of the SMF. Specifically, the process of this example can be:

[0232] Step 1201: A PC5 link for relay communication is established between the Remote UE and the Relay UE.

[0233] Step 1202: The Relay UE establishes or modifies a PDU session for relay communication. The Relay UE reports Remote UE information to the SMF through the AMF. The Remote UE information includes Remote UE identification information and Remote UE address information. The SMF reports the Remote UE information to the SM PCF.

[0234] Step 1203: The SM PCF determines a PCC rule, where the PCC rule is used to relay the PDU session of the terminal device.

[0235] Specifically, the SM PCF determines that the destination UE of the AF request is the Remote UE based on the address information provided by the AF in the service requirements corresponding to the service data flow requested by the AF and the Remote UE address information obtained from the SMF, and the SM PCF generates PCC rules according to the service requirements requested by the AF.

[0236] Step 1204: The SM PCF sends the PCC rules to the SMF.

[0237] Optionally, the SM PCF sends sixth indication information (for relaying indication) to the SMF, where the sixth indication information is used to indicate that a second PC5 QoS parameter is determined according to the QoS parameter in the PCC rule.

[0238] Step 1205: The SMF determines a QoS profile according to the quality of service QoS parameters in the PCC rule.

[0239] Step 1206: The SMF sends the second indication information and the QoS profile to RAN 2.

[0240] The two ways for the SMF to obtain / determine the second indication information include: 1) obtaining it according to the sixth indication information obtained from the SMPCF; 2) the SMF receives the seventh indication information from the AMF, and the SMF obtains the second indication information according to the seventh indication information. The second indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS profile, and the second PC5 QoS parameter is used for the relay communication of the relay terminal device.

[0241] The QoS profile includes 5QI, GFBR, and MFBR.

[0242] Specifically, the SMF may send the second indication information to RAN 2 via N2 SM info.

[0243] Step 1207: The RAN 2 determines the second PC5 QoS parameters according to the QoS profile.

[0244] Specifically, the RAN2 determines the second PC5 QoS parameter (PQI, GFBR, MFBR) according to the QoS mapping relationship (such as the 5QI / PQI mapping relationship) and the QoS parameters (including 5QI, GFBR, MFBR) in the QoS profile, and the QoS mapping relationship is used to represent the mapping relationship between the QoS parameters and the PC5 QoS parameters. RAN2 determines the PQI in the second PC5 QoS parameter according to the 5QI / PQI mapping relationship) and the 5QI in the QoS profile. RAN2 sets the GFBR in the second PC5 QoS parameter to be equal to the GFBR in the QoS profile. RAN2 sets the MFBR in the second PC5 QoS parameter to be equal to the MFBR in the QoS profile.

[0245] The 5QI / PQI mapping relationship is preconfigured in RAN 2, or provided by AM PCF to RAN 2 through AMF during the Relay UE registration process, or provided by SMF, or provided by SM PCF. For example, the 5QI / PQI mapping relationship may be that 5QI=10 is mapped to PQI=20.

[0246] Step 1208: SMF sends the QoS parameters in the PDU session such as 5QI to the Relay UE.

[0247] Step 1209: The Relay UE maps the PC5 QoS parameters for relay communication according to the QoS parameters in the PDU session such as 5QI, and sends them to the Remote UE.

[0248] After that, the process of Relay UE and Remote UE requesting communication configuration parameters or communication resources is the same as Fig.11 The processes involved in the embodiments shown in are the same. Specifically, for Relay UE, please refer to Fig. 9 Steps 907a to 909 in the embodiment shown are the same and will not be repeated here. Fig.12 For Remote UE, steps 1210 to 1212 may refer to Fig.11 Steps 1107 to 1109 in the illustrated embodiment will not be repeated here.

[0249] Through the above example, RAN can generate PC5 QoS parameters for relay communication that are consistent with the PC5 QoS parameters for relay communication generated by Relay UE / Remote UE, and can authorize the PC5 QoS parameters for relay communication in the process of requesting communication configuration parameters or communication resources.

[0250] Based on the above embodiments, the present application provides a communication device. Fig.13 As shown, the communication device 1300 may include a transceiver unit 1301 and a processing unit 1302. The transceiver unit 1301 is used for the communication device 1300 to receive information (message or data) or send information (message or data), and the processing unit 1302 is used to control and manage the actions of the communication device 1300. The processing unit 1302 may also control the steps performed by the transceiver unit 1301.

[0251] Exemplarily, the communication device 1300 may be the access network device in the above-mentioned embodiments, specifically a processor, a chip, a chip system, or a functional module in the access network device; or, the communication device 1300 may be the first device in the above-mentioned embodiments, specifically a processor, a chip, a chip system, or a functional module in the first device; or, the communication device 1300 may be the session management function in the above-mentioned embodiments, specifically a processor, a chip, a chip system, or a functional module in the session management function; or, the communication device 1300 may be the terminal device in the above-mentioned embodiments, specifically a processor, a chip, a chip system, or a functional module in the terminal device.

[0252] In one embodiment, when the communication device 1300 is used to implement the functions of the access network device in the above embodiment, it may specifically include:

[0253] The transceiver unit 1301 is used to receive first information from a terminal device, the first information including a first proximity-based service communication 5 PC5 quality of service QoS parameter, the first PC5 QoS parameter being used for relay communication of the terminal device; according to the first PC5 QoS parameter, communication configuration parameters are sent to the terminal device; the processing unit 1302 is used to control the transceiver operation of the transceiver unit 1301.

[0254] In an optional implementation, the terminal device is a relay terminal device or a remote terminal device.

[0255] Specifically, before the transceiver unit 1301 sends the communication configuration parameters to the terminal device according to the first PC5 QoS parameters, the processing unit 1302 is also used to: obtain the second PC5 QoS parameters of the terminal device, the second PC5 QoS parameters are used for relay communication of the terminal device; and authorize the first PC5 QoS parameters according to the second PC5 QoS parameters.

[0256] Exemplarily, when the processing unit 1302 obtains the second PC5 QoS parameter of the terminal device, it is specifically used to: control the transceiver unit 1301 to receive the second PC5 QoS parameter from the first device; or, control the transceiver unit 1301 to receive the second PC5 QoS parameter and first indication information from the first device, wherein the first indication information is used to indicate that the second PC5 QoS parameter is used for relay communication.

[0257] In an optional embodiment, the terminal device is a relay terminal device, and when the processing unit 1302 obtains the second PC5 QoS parameter of the terminal device, it is specifically used to: control the transceiver unit 1301 to receive a QoS configuration file and second indication information from the first device, the second indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS configuration file; determine the second PC5 QoS parameter according to the QoS configuration file.

[0258] Specifically, when the processing unit 1302 determines the second PC5 QoS parameter according to the QoS configuration file, it is specifically used to: determine the second PC5 QoS parameter according to the QoS mapping relationship and the QoS parameters in the QoS configuration file, and the QoS mapping relationship is used to represent the mapping relationship between the QoS parameters and the PC5 QoS parameters.

[0259] Optionally, the first device is a policy control function.

[0260] Optionally, the first device is a session management function, and the terminal device is a relay terminal device.

[0261] In a specific implementation, the first information further includes third indication information, and the third indication information is used to indicate that the first PC5 QoS parameter is used for relay communication; or, the first information further includes fourth indication information and identification information of the PC5 link, and the fourth indication information is used to indicate that the PC5 link is used for relay communication.

[0262] In another specific implementation, the first information also includes identification information of the PC5 link; before the transceiver unit 1301 receives the first information from the terminal device, the transceiver unit 1301 is also used to: receive second information from the terminal device, the second information including fifth indication information and identification information of the PC5 link, and the fifth indication information is used to indicate that the PC5 link is used for relay communication.

[0263] In one example, the terminal device is a remote terminal device, and when the transceiver unit 1301 receives the first information from the terminal device, it is specifically used to: receive the first information from the terminal device through a relay terminal device.

[0264] In one embodiment, when the communication device 1300 is used to implement the function of the first device in the above embodiment, it may specifically include:

[0265] The processing unit 1302 is used to obtain a second proximity-based communication 5 PC5 quality of service QoS parameter of the terminal device, where the second PC5 QoS parameter is used for relay communication of the terminal device; the transceiver unit 1301 is used to send the second PC5 QoS parameter to the access network device.

[0266] In an optional implementation, the terminal device is a relay terminal device or a remote terminal device.

[0267] Exemplarily, the transceiver unit 1301 is further used to send first indication information to the access network device, where the first indication information is used to indicate that the second PC5 QoS parameter is used for relay communication.

[0268] Specifically, the transceiver unit 1301 is also used to receive relay capability information from the terminal device; further, when the transceiver unit 1301 sends the second PC5 QoS parameter to the access network device, it is specifically used to: send the second PC5 QoS parameter to the access network device according to the relay capability information.

[0269] Optionally, when the processing unit 1302 obtains the second PC5 QoS parameter of the terminal device, it is specifically used to: control the transceiver unit 1301 to receive the second PC5 QoS parameter from the policy control function; wherein the terminal device is a relay terminal device.

[0270] Optionally, when the processing unit 1302 of the first device obtains the second PC5 QoS parameters of the terminal device, it is specifically used to: control the transceiver unit 1301 to receive sixth indication information and policy and charging control PCC rules from the policy control function, the sixth indication information being used to indicate that the second PC5 QoS parameters are determined according to the QoS parameters in the PCC rules; determine the second PC5 QoS parameters according to the QoS parameters in the PCC rules.

[0271] Exemplarily, when the processing unit 1302 determines the second PC5 QoS parameter according to the QoS parameter in the PCC rule, it is specifically used to: determine a QoS profile according to the QoS parameter in the PCC rule; determine the second PC5 QoS parameter according to the QoS profile.

[0272] In an optional implementation, the first device is a policy control function.

[0273] In another optional implementation, the first device is a session management function.

[0274] In one embodiment, when the communication device 1300 is used to implement the session management function in the above embodiment, it may specifically include:

[0275] The transceiver unit 1301 is used to receive policy and charging control PCC rules from a policy control function, and the PCC rules are used for the protocol data unit PDU session of the relay terminal device; the processing unit 1302 is used to determine the QoS profile according to the quality of service QoS parameters in the PCC rules; the transceiver unit 1301 is also used to send second indication information and the QoS profile to the access network device, and the second indication information is used to indicate the determination of the second proximity service communication 5 PC5 QoS parameters according to the QoS profile, and the second PC5 QoS parameters are used for the relay communication of the relay terminal device.

[0276] In an optional implementation, the transceiver unit 1301 is also used to receive a sixth indication information from the policy control function, and the sixth indication information is used to indicate that the second PC5QoS parameter is determined according to the QoS parameter in the PCC rule; when the transceiver unit 1301 sends the second indication information to the access network device, it is specifically used to: send the second indication information to the access network device according to the sixth indication information.

[0277] In an optional implementation, the transceiver unit 1301 is further used to receive the seventh indication information from the access and mobility management function, where the seventh indication information is used to indicate that the PDU session is used for relay communication;

[0278] When the transceiver unit 1301 sends the second indication information to the access network device, it is specifically used to: send the second indication information to the access network device according to the seventh indication information.

[0279] In one embodiment, when the communication device 1300 is used to implement the functions of the terminal device in the above embodiment, it may specifically include:

[0280] The transceiver unit 1301 is used to send first information to the access network device, the first information includes a first proximity-based service communication 5 PC5 service quality QoS parameter, and the first PC5 QoS parameter is used for the relay communication of the terminal device; receive communication configuration parameters from the access network device; the processing unit 1302 is used to configure the PC5 link according to the communication configuration parameters.

[0281] In an optional implementation, the terminal device is a relay terminal device or a remote terminal device.

[0282] Specifically, before the transceiver unit 1301 sends the first information to the access network device, the transceiver unit 1301 is further used to: receive the first PC5 QoS parameter from the first device.

[0283] Exemplarily, the transceiver unit 1301 is further used to receive eighth indication information from the first device, where the eighth indication information is used to indicate that the first PC5 QoS parameter is used for relay communication.

[0284] Optionally, the first device is a policy control function or a session management function.

[0285] Specifically, the first information also includes third indication information, and the third indication information is used to indicate that the first PC5 QoS parameter is used for relay communication; or, the first information also includes fourth indication information and identification information of the PC5 link, and the fourth indication information is used to indicate that the PC5 link is used for relay communication.

[0286] Exemplarily, the first information also includes identification information of the PC5 link; before the transceiver unit 1301 sends the first information to the access network device, it is also used to: send second information to the access network device, the second information includes fifth indication information and identification information of the PC5 link, and the fifth indication information is used to indicate that the PC5 link is used for relay communication.

[0287] In an optional implementation, the terminal device is a remote terminal device, and when the transceiver unit 1301 sends the first information to the access network device, it is specifically used to: send the first information to the access network device through a relay terminal device.

[0288] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. Each functional unit in the embodiments of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0289] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0290] The communication device provided in the embodiment of the present application can also be referred to Fig.14 As shown, the communication device 1400 may include a transceiver 1401 and a processor 1402. Optionally, the communication device 1400 may further include a memory 1403. The memory 1403 may be disposed inside the communication device 1400 or outside the communication device 1400. The processor 1402 may control the transceiver 1401 to receive and send data or information.

[0291] Specifically, the processor 1402 may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and a NP. The processor 1402 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0292] Among them, the transceiver 1401, the processor 1402 and the memory 1403 are interconnected. Optionally, the transceiver 1401, the processor 1402 and the memory 1403 are interconnected via a bus 1404; the bus 1404 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.14 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0293] In an optional implementation, the memory 1403 is used to store programs, etc. Specifically, the program may include a program code, and the program code includes a computer operation instruction. The memory 1403 may include a RAM, and may also include a non-volatile memory (non-volatile memory), such as one or more disk memories. The processor 1402 executes the application program stored in the memory 1403 to implement the above functions, thereby realizing the functions of the communication device 1400.

[0294] Exemplarily, the communication device 1400 may be the above-mentioned access network device, the first device, the session management function or the terminal device.

[0295] In one embodiment, when the communication device 1400 is used to implement the functions of the access network device in the above embodiment, it may specifically include:

[0296] The transceiver 1401 is used to receive first information from a terminal device, the first information including a first proximity-based service communication 5 PC5 quality of service QoS parameter, the first PC5 QoS parameter being used for relay communication of the terminal device; according to the first PC5 QoS parameter, communication configuration parameters are sent to the terminal device; the processor 1402 is used to control the transceiver 1401's transceiver operations.

[0297] In an optional implementation, the terminal device is a relay terminal device or a remote terminal device.

[0298] Specifically, before the transceiver 1401 sends the communication configuration parameter to the terminal device according to the first PC5 QoS parameter, the processor 1402 is also used to: obtain a second PC5 QoS parameter of the terminal device, the second PC5 QoS parameter being used for relay communication of the terminal device; and authorize the first PC5 QoS parameter according to the second PC5 QoS parameter.

[0299] Exemplarily, when the processor 1402 obtains the second PC5 QoS parameter of the terminal device, it is specifically used to: control the transceiver 1401 to receive the second PC5 QoS parameter from the first device; or control the transceiver 1401 to receive the second PC5 QoS parameter and first indication information from the first device, wherein the first indication information is used to indicate that the second PC5 QoS parameter is used for relay communication.

[0300] In an optional embodiment, the terminal device is a relay terminal device, and when the processor 1402 obtains the second PC5 QoS parameter of the terminal device, it is specifically used to: control the transceiver 1401 to receive a QoS configuration file and second indication information from the first device, the second indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS configuration file; determine the second PC5 QoS parameter according to the QoS configuration file.

[0301] Specifically, when the processor 1402 determines the second PC5 QoS parameter according to the QoS configuration file, it is specifically used to: determine the second PC5 QoS parameter according to the QoS mapping relationship and the QoS parameters in the QoS configuration file, and the QoS mapping relationship is used to represent the mapping relationship between the QoS parameters and the PC5 QoS parameters.

[0302] Optionally, the first device is a policy control function.

[0303] Optionally, the first device is a session management function, and the terminal device is a relay terminal device.

[0304] In a specific implementation, the first information further includes third indication information, and the third indication information is used to indicate that the first PC5 QoS parameter is used for relay communication; or, the first information further includes fourth indication information and identification information of the PC5 link, and the fourth indication information is used to indicate that the PC5 link is used for relay communication.

[0305] In another specific implementation, the first information also includes identification information of the PC5 link; before the transceiver 1401 receives the first information from the terminal device, the transceiver 1401 is also used to: receive second information from the terminal device, the second information including fifth indication information and identification information of the PC5 link, and the fifth indication information is used to indicate that the PC5 link is used for relay communication.

[0306] In one example, the terminal device is a remote terminal device, and when the transceiver 1401 receives the first information from the terminal device, it is specifically used to: receive the first information from the terminal device through a relay terminal device.

[0307] In one embodiment, when the communication device 1400 is used to implement the function of the first device in the above embodiment, it may specifically include:

[0308] The processor 1402 is used to obtain a second proximity-based communication 5 PC5 quality of service QoS parameter of the terminal device, where the second PC5 QoS parameter is used for relay communication of the terminal device; the transceiver 1401 is used to send the second PC5 QoS parameter to the access network device.

[0309] In an optional implementation, the terminal device is a relay terminal device or a remote terminal device.

[0310] Exemplarily, the transceiver 1401 is further used to send first indication information to the access network device, where the first indication information is used to indicate that the second PC5 QoS parameter is used for relay communication.

[0311] Specifically, the transceiver 1401 is also used to receive relay capability information from the terminal device; further, when the transceiver 1401 sends the second PC5 QoS parameter to the access network device, it is specifically used to: send the second PC5 QoS parameter to the access network device according to the relay capability information.

[0312] Optionally, when the processor 1402 obtains the second PC5 QoS parameter of the terminal device, it is specifically used to: control the transceiver 1401 to receive the second PC5 QoS parameter from a policy control function; wherein the terminal device is a relay terminal device.

[0313] Optionally, when the processor 1402 of the first device obtains the second PC5 QoS parameter of the terminal device, it is specifically used to: control the transceiver 1401 to receive sixth indication information and policy and charging control PCC rules from the policy control function, the sixth indication information being used to indicate that the second PC5 QoS parameter is determined according to the QoS parameters in the PCC rule; determine the second PC5 QoS parameter according to the QoS parameters in the PCC rule.

[0314] Exemplarily, when the processor 1402 determines the second PC5 QoS parameter according to the QoS parameter in the PCC rule, it is specifically used to: determine a QoS profile according to the QoS parameter in the PCC rule; determine the second PC5 QoS parameter according to the QoS profile.

[0315] In an optional implementation, the first device is a policy control function.

[0316] In another optional implementation, the first device is a session management function.

[0317] In one embodiment, when the communication device 1400 is used to implement the session management function in the above embodiment, it may specifically include:

[0318] The transceiver 1401 is used to receive policy and charging control PCC rules from a policy control function, and the PCC rules are used for the protocol data unit PDU session of the relay terminal device; the processor 1402 is used to determine the QoS profile according to the quality of service QoS parameters in the PCC rules; the transceiver 1401 is also used to send second indication information and the QoS profile to the access network device, and the second indication information is used to indicate the determination of a second proximity service communication 5 PC5 QoS parameter according to the QoS profile, and the second PC5 QoS parameter is used for the relay communication of the relay terminal device.

[0319] In an optional implementation, the transceiver 1401 is also used to receive sixth indication information from the policy control function, and the sixth indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS parameter in the PCC rule; when the transceiver 1401 sends the second indication information to the access network device, it is specifically used to: send the second indication information to the access network device according to the sixth indication information.

[0320] In an optional implementation, the transceiver 1401 is further used to receive the seventh indication information from the access and mobility management function, where the seventh indication information is used to indicate that the PDU session is used for relay communication;

[0321] When the transceiver 1401 sends the second indication information to the access network device, it is specifically used to: send the second indication information to the access network device according to the seventh indication information.

[0322] In one embodiment, when the communication device 1400 is used to implement the functions of the terminal device in the above embodiment, it may specifically include:

[0323] The transceiver 1401 is used to send first information to the access network device, the first information includes a first proximity-based service communication 5 PC5 service quality QoS parameter, and the first PC5 QoS parameter is used for the relay communication of the terminal device; receive communication configuration parameters from the access network device; the processor 1402 is used to configure the PC5 link according to the communication configuration parameters.

[0324] In an optional implementation, the terminal device is a relay terminal device or a remote terminal device.

[0325] Specifically, before the transceiver 1401 sends the first information to the access network device, the transceiver 1401 is further used to: receive the first PC5 QoS parameter from the first device.

[0326] Exemplarily, the transceiver 1401 is further used to receive eighth indication information from the first device, where the eighth indication information is used to indicate that the first PC5 QoS parameter is used for relay communication.

[0327] Optionally, the first device is a policy control function or a session management function.

[0328] Specifically, the first information also includes third indication information, and the third indication information is used to indicate that the first PC5 QoS parameter is used for relay communication; or, the first information also includes fourth indication information and identification information of the PC5 link, and the fourth indication information is used to indicate that the PC5 link is used for relay communication.

[0329] Exemplarily, the first information also includes identification information of the PC5 link; before the transceiver 1401 sends the first information to the access network device, it is also used to: send second information to the access network device, the second information includes fifth indication information and identification information of the PC5 link, and the fifth indication information is used to indicate that the PC5 link is used for relay communication.

[0330] In an optional implementation, the terminal device is a remote terminal device, and when the transceiver 1401 sends the first information to the access network device, it is specifically used to: send the first information to the access network device via a relay terminal device.

[0331] Fig.15 1 is a schematic diagram of the structure of an access network device provided in an embodiment of the present application, such as a schematic diagram of the structure of a base station. Fig.15 As shown, the access network device can be applied to Figure 1 In the communication system shown, the functions of any access network device in the above method embodiments are performed. The base station 1500 may include one or more distributed units (DU) 1501 and one or more centralized units (CU) 1502. The DU 1501 may include at least one antenna 15011, at least one radio frequency unit 15012, at least one processor 15017 and at least one memory 15014. The DU 1501 part is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals to baseband signals, as well as partial baseband processing. CU1502 may include at least one processor 15022 and at least one memory 15021. CU1502 and DU1501 may communicate through an interface, wherein the control plane interface may be Fs-C, such as F1-C, and the user plane interface may be Fs-U, such as F1-U.

[0332] The CU 1502 part is mainly used for baseband processing, controlling the base station, etc. The DU 1501 and CU1502 can be physically set together or physically separated, that is, a distributed base station. The CU 1502 is the control center of the base station, which can also be called a processing unit, and is mainly used to complete the baseband processing function. For example, the CU 1502 can be used to control the base station to execute the operation process of the access network device in the above method embodiment.

[0333] Specifically, the baseband processing on the CU and DU can be divided according to the protocol layer of the wireless network, for example, the functions of the PDCP layer and above are set in the CU, and the functions of the protocol layers below the PDCP, such as the RLC layer and the MAC layer, are set in the DU. For another example, the CU implements the functions of the RRC and PDCP layers, and the DU implements the functions of the RLC, MAC and physical (PHY) layers.

[0334] In addition, optionally, the base station 1500 may include one or more radio frequency units (RU), one or more DUs and one or more CUs. Among them, the DU may include at least one processor 15017 and at least one memory 15014, the RU may include at least one antenna 15011 and at least one radio frequency unit 15012, and the CU may include at least one processor 15022 and at least one memory 15021.

[0335] In one example, the CU1502 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as a 5G network) with a single access indication, or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The memory 15021 and the processor 15022 may serve one or more boards. In other words, a memory and a processor may be separately set on each board. It may also be that multiple boards share the same memory and processor. In addition, necessary circuits may be provided on each board. The DU1501 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as a 5G network) with a single access indication, or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The memory 15014 and the processor 15017 may serve one or more boards. In other words, a memory and a processor may be separately set on each board. It may also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each board.

[0336] Based on the above embodiments, an embodiment of the present application provides a communication system, which may include the first device (policy control function or session management function) involved in the above embodiments, access network equipment and terminal equipment, etc.

[0337] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program. When the computer program is executed by a computer, the computer can implement the communication method provided by the above method embodiment.

[0338] An embodiment of the present application further provides a computer program product, which is used to store a computer program. When the computer program is executed by a computer, the computer can implement the communication method provided by the above method embodiment.

[0339] An embodiment of the present application also provides a chip, which is coupled to a memory and is used to implement the communication method provided in the above method embodiment.

[0340] The embodiment of the present application also provides a chip system, which includes a processor for supporting the above-mentioned communication device to implement the functions involved in the above-mentioned aspects. In a possible design, the chip system also includes a memory, which is used to store program instructions and data necessary for the communication device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0341] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0342] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0343] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0344] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0345] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of protection of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: include: The access network device receives first information from the terminal device, wherein the first information includes a first proximity-based service communication 5PC5 quality of service QoS parameter, and the first PC5 QoS parameter is used for relay communication of the terminal device; The access network device sends communication configuration parameters to the terminal device according to the first PC5 QoS parameter; Wherein, before the access network device sends the communication configuration parameter to the terminal device according to the first PC5 QoS parameter, the method further includes: The access network device acquires a second PC5 QoS parameter of the terminal device, where the second PC5 QoS parameter is used for relay communication of the terminal device; The access network device authorizes the first PC5 QoS parameter according to the second PC5 QoS parameter.

2. The method according to claim 1, characterized in that The terminal device is a relay terminal device or a remote terminal device.

3. The method according to claim 1, characterized in that The access network device obtains the second PC5 QoS parameter of the terminal device, including: The access network device receives the second PC5 QoS parameter from the first device; or, The access network device receives the second PC5 QoS parameter and first indication information from the first device, where the first indication information is used to indicate that the second PC5 QoS parameter is used for relay communication.

4. The method according to claim 1, characterized in that The terminal device is a relay terminal device, and the access network device obtains the second PC5 QoS parameter of the terminal device, including: The access network device receives a QoS configuration file and second indication information from the first device, where the second indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS configuration file; The access network device determines the second PC5 QoS parameter according to the QoS configuration file.

5. The method according to claim 4, characterized in that The access network device determines the second PC5 QoS parameter according to the QoS configuration file, including: The access network device determines the second PC5 QoS parameter according to the QoS mapping relationship and the QoS parameters in the QoS configuration file, where the QoS mapping relationship is used to represent a mapping relationship between the QoS parameters and the PC5 QoS parameters.

6. The method according to claim 3, characterized in that The first device is a policy control function.

7. The method according to any one of claims 3 to 5, characterized in that: The first device is a session management function, and the terminal device is a relay terminal device.

8. The method according to any one of claims 1 to 6, characterized in that: The first information further includes third indication information, and the third indication information is used to indicate that the first PC5 QoS parameter is used for relay communication; or, The first information also includes fourth indication information and identification information of the PC5 link, and the fourth indication information is used to indicate that the PC5 link is used for relay communication.

9. The method according to any one of claims 1 to 6, characterized in that: The first information also includes identification information of the PC5 link; Before the access network device receives the first information from the terminal device, the method further includes: The access network device receives second information from the terminal device, where the second information includes fifth indication information and identification information of the PC5 link, and the fifth indication information is used to indicate that the PC5 link is used for relay communication.

10. The method according to any one of claims 1 to 3 and 6, characterized in that: The terminal device is a remote terminal device, and the access network device receives the first information from the terminal device, including: The access network device receives the first information from the terminal device via a relay terminal device.

11. A communication method, characterized in that: include: The first device obtains a second proximity-based service communication 5 PC5 quality of service QoS parameter of the terminal device, where the second PC5 QoS parameter is used for relay communication of the terminal device; The first device sends the second PC5 QoS parameter to the access network device, wherein the second PC5 QoS parameter is used by the access network device to authorize the first PC5 QoS parameter, and the first PC5 QoS parameter is used for relay communication of the terminal device.

12. The method according to claim 11, characterized in that The terminal device is a relay terminal device or a remote terminal device.

13. The method according to claim 11 or 12, characterized in that The method further comprises: The first device sends first indication information to the access network device, where the first indication information is used to indicate that the second PC5 QoS parameter is used for relay communication.

14. The method according to any one of claims 11 to 12, characterized in that: The method further comprises: The first device receives relay capability information from the terminal device; The first device sends the second PC5 QoS parameter to the access network device, including: the first device sends the second PC5 QoS parameter to the access network device according to the relay capability information.

15. The method according to any one of claims 11 to 12, characterized in that: The first device obtains the second PC5 QoS parameter of the terminal device, including: The first device receives the second PC5 QoS parameter from a policy control function; Wherein, the terminal device is a relay terminal device.

16. The method according to any one of claims 11 to 12, characterized in that: The first device obtains the second PC5 QoS parameter of the terminal device, including: The first device receives sixth indication information and a policy and charging control PCC rule from a policy control function, wherein the sixth indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS parameter in the PCC rule; The first device determines the second PC5 QoS parameter according to the QoS parameter in the PCC rule.

17. The method according to claim 16, characterized in that The first device determines the second PC5 QoS parameter according to the QoS parameter in the PCC rule, including: The first device determines a QoS profile according to the QoS parameters in the PCC rule; The first device determines the second PC5 QoS parameter according to the QoS configuration file.

18. The method according to any one of claims 11 to 12, characterized in that: The first device is a policy control function.

19. The method according to any one of claims 11 to 12, characterized in that: The first device is a session management function.

20. A communication method, characterized in that: include: The session management function receives a policy and charging control PCC rule from the policy control function, wherein the PCC rule is used to relay a protocol data unit PDU session of the terminal device; The session management function determines a QoS profile according to a quality of service QoS parameter in the PCC rule; The session management function sends a second indication information and the QoS profile to the access network device, the second indication information is used to indicate the determination of a second proximity service communication 5PC5 QoS parameter according to the QoS profile, the second PC5 QoS parameter is used for the relay communication of the relay terminal device, the second PC5 QoS parameter is used for the access network device to authorize the first PC5 QoS parameter, and the first PC5 QoS parameter is used for the relay communication of the terminal device.

21. The method according to claim 20, characterized in that The method further comprises: The session management function receives sixth indication information from the policy control function, where the sixth indication information is used to indicate that the second PC5 QoS parameter is determined according to the QoS parameter in the PCC rule; The session management function sends second indication information to the access network device, including: The session management function sends the second indication information to the access network device according to the sixth indication information.

22. The method of claim 20, wherein: The method further comprises: The session management function receives seventh indication information from the access and mobility management function, where the seventh indication information is used to indicate that the PDU session is used for relay communication; The session management function sends second indication information to the access network device, including: The session management function sends the second indication information to the access network device according to the seventh indication information.

23. A communication method, characterized in that: include: The terminal device sends first information to the access network device, wherein the first information includes a first proximity-based service communication 5 PC5 quality of service QoS parameter, wherein the first PC5 QoS parameter is used for relay communication of the terminal device, so that the access network device authorizes the first PC5 QoS parameter according to a second PC5 QoS parameter, wherein the second PC5 QoS parameter is used for relay communication of the terminal device; The terminal device receives communication configuration parameters from the access network device; The terminal device configures the PC5 link according to the communication configuration parameters.

24. The method of claim 23, wherein: The terminal device is a relay terminal device or a remote terminal device.

25. The method according to claim 23 or 24, characterized in that Before the terminal device sends the first information to the access network device, the method further includes: The terminal device receives the first PC5 QoS parameter from the first device.

26. The method of claim 25, wherein: The method further comprises: The terminal device receives eighth indication information from the first device, where the eighth indication information is used to indicate that the first PC5 QoS parameter is used for relay communication.

27. The method of claim 25, wherein: The first device is a policy control function or a session management function.

28. The method according to any one of claims 23-24, characterized in that The first information further includes third indication information, and the third indication information is used to indicate that the first PC5 QoS parameter is used for relay communication; or, The first information also includes fourth indication information and identification information of the PC5 link, and the fourth indication information is used to indicate that the PC5 link is used for relay communication.

29. The method according to any one of claims 23-24, characterized in that The first information also includes identification information of the PC5 link; Before the terminal device sends the first information to the access network device, the method further includes: The terminal device sends second information to the access network device, where the second information includes fifth indication information and identification information of the PC5 link, and the fifth indication information is used to indicate that the PC5 link is used for relay communication.

30. The method according to any one of claims 23 to 24, characterized in that The terminal device is a remote terminal device, and the terminal device sends the first information to the access network device, including: The terminal device sends the first information to the access network device through a relay terminal device.

31. A communication device, characterized in that: The method comprises a unit or a module for executing the method according to any one of claims 1 to 10.

32. A communication device, characterized in that: The method comprises a unit or a module for executing the method according to any one of claims 11 to 19.

33. A communication device, characterized in that: Comprising units or modules for executing the method according to any one of claims 20-22.

34. A communication device, characterized in that: The method comprises a unit or a module for executing the method according to any one of claims 23 to 30.

35. A communication device, characterized in that: Includes a processor and a transceiver, wherein: The transceiver is used to send and receive data or information; The processor is coupled to the memory, and is used to call the program in the memory so that the communication device executes the method according to any one of claims 1-10.

36. A communication device, characterized in that: Includes a processor and a transceiver, wherein: The transceiver is used to send and receive data or information; The processor is coupled to the memory, and is used to call the program in the memory to enable the communication device to execute the method according to any one of claims 11-19.

37. A communication device, characterized in that: Includes a processor and a transceiver, wherein: The transceiver is used to send and receive data or information; The processor is coupled to the memory, and is used to call the program in the memory so that the communication device executes the method according to any one of claims 20-22.

38. A communication device, characterized in that: Includes a processor and a transceiver, wherein: The transceiver is used to send and receive data or information; The processor is coupled to the memory, and is used to call the program in the memory so that the communication device executes the method according to any one of claims 23-30.

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