WO2021203433A1

WO2021203433A1 - Communication method and apparatus

Info

Publication number: WO2021203433A1
Application number: PCT/CN2020/084294
Authority: WO
Inventors: 许胜锋; 李濛; 吴义壮; 杨艳梅
Original assignee: 华为技术有限公司
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-10-14

Abstract

Provided are a communication method and apparatus, which relate to the technical field of communications. The method comprises: an access network device determining a first AMBR of a relay terminal; and the access network device controlling the transmission rate of data of the relay terminal by using a third AMBR, wherein the third AMBR is a smaller value in the first AMBR and a second AMBR; the first AMBR is the sum of AMBRs of a first group of PDU sessions of the relay terminal; the first group of PDU sessions is used for bearing data of the relay terminal; the second AMBR is the upper limit of the transmission rate of data of a subscribed relay terminal; the access network device is an access network device accessed by the relay terminal; and the relay terminal is used for providing a relay service for a remote terminal. Comparing the present application with the prior art, for the first AMBR, only the AMBRs of the first group of PDU sessions, rather than the AMBRs of a second group of PDU sessions, are taken into consideration, thereby more accurately controlling the transmission rate of data of a relay terminal.

Description

Communication method and device

Technical field

This application relates to the field of communication technology, and in particular to a communication method and device.

Background technique

The device-to-device (D2D) communication technology refers to a communication method in which two peer user nodes (for example, terminals) communicate directly. D2D communication can be applied in fields such as video chat, virtual reality (VR), and augmented reality (AR).

A terminal relay scenario of D2D communication (that is, a scenario where a certain terminal/certain terminals provide relay services to other terminals) can be seen in Figure 1. When terminal 1 is outside the coverage of the access network equipment or terminal 1 and When the signal quality between the access network devices is poor, the terminal 1 can be assisted by the terminal 2 to communicate with the access network device, and then communicate with the core network. Specifically, the terminal 1 communicates with the terminal 2, and the terminal 2 communicates with the access network device to realize the communication between the terminal 1 and the access network device, thereby supporting the communication between the terminal and the access network device and the core network that cannot directly communicate with the access network device. Communication.

In a terminal relay scenario, a terminal connected to an access network device through indirect communication (indirect communication) may be called a remote user equipment (user equipment, UE) (remote UE), for example, terminal 1. A terminal used to support indirect communication between a remote UE and an access network device, or in other words, a terminal used to provide a relay service for a remote UE, is called a relay UE, for example, terminal 2.

In the terminal relay scenario, how to accurately control the data transmission rate by the access network device is an urgent problem to be solved.

Summary of the invention

The embodiments of the present application provide a communication method and device, which are used to more accurately control the data transmission rate in a terminal relay scenario.

In order to achieve the foregoing objectives, the embodiments of the present application provide the following technical solutions:

In a first aspect, a communication method is provided, including: an access network device determines a first AMBR of a relay terminal; and the access network device uses a third AMBR to control a data transmission rate of the relay terminal. Among them, the access network equipment is the access network equipment accessed by the relay terminal, the relay terminal is used to provide relay services for the remote terminal, the third AMBR is the smaller value of the first AMBR and the second AMBR, and the first AMBR is the sum of AMBR of the first group of PDU sessions of the relay terminal, the first group of PDU sessions is used to carry data of the relay terminal, and the second AMBR is the upper limit of the data transmission rate of the subscribed relay terminal. In the method provided in the first aspect, the access network device determines the smaller value of the first AMBR and the second AMBR as the AMBR used to control the data transmission rate of the relay terminal. Compared with the prior art, the first AMBR only considers the AMBR of the first group of PDU sessions, and does not consider the AMBR of the second group of PDU sessions, thereby more accurately controlling the data transmission rate of the relay terminal.

In a possible implementation manner, the method further includes: the access network device receives, from the first device, first indication information for indicating that the first PDU session is used for providing relay services, and the first PDU session is used for relaying The terminal provides a relay service for the first remote terminal, the first group of PDU sessions does not include the first PDU session, and the first remote terminal is one of the remote terminals served by the relay terminal; the access network device determines the first relay terminal The AMBR includes: the access network device determines the first AMBR of the relay terminal based on the first indication information. In this possible implementation manner, by receiving the first indication information from the first device, the access network device can determine which PDU sessions are used to provide the relay service, and then determine which PDU sessions are not included in the first group of PDU sessions, thereby determining the first group of PDU sessions. One AMBR.

In a possible implementation manner, the method further includes: the access network device receives from the first device second indication information for indicating that the second PDU session is used for providing relay services, and the second PDU session is used for relaying The terminal provides a relay service for the second remote terminal, the first group of PDU sessions does not include the second PDU session, and the second remote terminal is one of the remote terminals served by the relay terminal; the access network device is based on the first indication information, Determining the first AMBR of the relay terminal includes: the access network device determines the first AMBR based on the first indication information and the second indication information. In this possible implementation manner, the access network device can determine which PDU sessions are used to provide relay services by receiving the first indication information and the second indication information from the first device, and then determine which PDUs are not included in the first group of PDU sessions Session to determine the first AMBR.

In a possible implementation manner, the first device is an SMF or AMF or a relay terminal.

In a possible implementation, the method further includes: the access network device receives a fourth AMBR of the relay terminal from the AMF, where the fourth AMBR is the upper limit of the data transmission rate of the remote terminal served by the subscribed relay terminal; The access network equipment uses the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal; among them, the sixth AMBR is the smaller of the fourth AMBR and the fifth AMBR, and the fifth AMBR is the relay terminal The sum of the AMBR of the second group of PDU sessions. The second group of PDU sessions is used to carry the data of the remote terminal served by the relay terminal. In this possible implementation manner, the access network device determines the smaller value of the fourth AMBR and the fifth AMBR as the AMBR used to control the data transmission rate of the remote terminal served by the relay terminal. The fifth AMBR only considers the AMBR of the second group of PDU sessions, and does not consider the AMBR of the first group of PDU sessions, so as to more accurately control the data transmission rate of the remote terminal served by the relay terminal.

In a possible implementation manner, the method further includes: the access network device receives the AMBR of the first PDU session from the SMF; and the access network device determines the fifth AMBR based on the AMBR of the first PDU session. In this possible implementation manner, the access network device can determine the AMBR of the PDU session in the second group of PDU sessions, so that the fifth AMBR can be determined.

In a second aspect, a communication method is provided, including: an access network device receives a fourth AMBR of a relay terminal from an AMF, where the fourth AMBR is the upper limit of the data transmission rate of the remote terminal served by the subscribed relay terminal; The network access equipment uses the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal; among them, the sixth AMBR is the smaller of the fourth AMBR and the fifth AMBR, and the fifth AMBR is the relay terminal’s The sum of the AMBR of the second group of PDU sessions. The second group of PDU sessions is used to carry the data of the remote terminal served by the relay terminal. In the method provided by the second aspect, the access network device determines the smaller value of the fourth AMBR and the fifth AMBR as the AMBR used to control the data transmission rate of the remote terminal served by the relay terminal. The fifth AMBR only considers the AMBR of the second group of PDU sessions, and does not consider the AMBR of the first group of PDU sessions, so as to more accurately control the data transmission rate of the remote terminal served by the relay terminal.

In a third aspect, a communication method is provided, including: a first device obtains first indication information for indicating that a first PDU session is used to provide a relay service, and sends the first indication information to an access network device. The access network device is an access network device accessed by the relay terminal, and the first PDU session is used by the relay terminal to provide a relay service for the first remote terminal. In the method provided by the third aspect, the first device can enable the access network device to determine which PDU sessions are used to provide the relay service by sending the first indication information to the access network device.

In a possible implementation manner, when the first device is SMF or AMF, acquiring the first indication information by the first device includes: the first device receives the first indication information from the relay terminal; or, the first device receives the first indication information from the relay terminal. The subsequent terminal receives the identification of the first remote terminal and the identification of the first PDU session, and determines the first indication information according to the identification of the first remote terminal and the identification of the first PDU session; or, the first device receives the remote terminal report from the relay terminal , And determine the first indication information according to the remote terminal report, and the remote terminal report carries the identifier of the first PDU session. This possible implementation manner provides multiple ways for the first device to obtain the first indication information.

In a possible implementation manner, the first device receives the identifier of the first remote terminal and the identifier of the first PDU session from the relay terminal, and determines the first indication information according to the identifier of the first remote terminal and the identifier of the first PDU session , Including: the first device receives a message from the relay terminal, the message carries the identity of the first remote terminal, the identity of the relay terminal, and the identity of the first PDU session; the first device according to the identity of the first remote terminal, the identity of the relay terminal The identifier and the identifier of the first PDU session determine the first indication information. This possible implementation manner provides a more specific manner for the first device to determine the first indication information according to the identifier of the first remote terminal and the identifier of the first PDU session.

In a possible implementation manner, when the first device is a relay terminal, sending the first indication information to the access network device by the first device includes: the first device sends the first indication information to the access network device through an RRC message. One instruction information.

In a fourth aspect, a communication method is provided, including: a relay terminal establishes a first PDU session, the first PDU session is used by the relay terminal to provide a relay service for the first remote terminal; the relay terminal notifies the first device to relay The terminal provides a relay service for the first remote terminal through the first PDU session, and the first device is SMF or AMF. The method provided by the fourth aspect provides a method for making the SMF determine the first indication information.

In a possible implementation manner, the relay terminal notifies the first device that the relay terminal provides a relay service for the first remote terminal through the first PDU session, including: the relay terminal provides the first remote terminal identification of the first device to the first remote terminal and The identifier of the first PDU session. This possible implementation provides a more specific method for the SMF to determine the first indication information.

In a possible implementation manner, the relay terminal notifying the first device that the relay terminal provides the relay service for the first remote terminal through the first PDU session includes: the relay terminal sends a message to the first device, and the message carries the first device. An identifier of a remote terminal, an identifier of a relay terminal, and an identifier of the first PDU session. This possible implementation provides a more specific method for the SMF to determine the first indication information.

In a possible implementation manner, the relay terminal notifying the first device that the relay terminal provides a relay service for the first remote terminal through the first PDU session includes: the relay terminal sends the first indication information to the first device, and An indication information is used to indicate that the first PDU session is used to provide a relay service for the first remote terminal. This possible implementation provides a more specific method for the SMF to determine the first indication information.

In a fifth aspect, a communication method is provided, including: a relay terminal establishes a first PDU session, where the first PDU session is used by the relay terminal to provide a relay service for the first remote terminal; and the relay terminal sends a remote The terminal report, the remote terminal report carries the identifier of the first PDU session, and the first device is SMF or AMF. The method provided in the fifth aspect provides yet another method for the SMF to determine the first indication information.

In a sixth aspect, a communication method is provided, including: the AMF receives a fourth AMBR of a relay terminal from a PCF, the relay terminal is used to provide a relay service for the remote terminal, and the fourth AMBR is a remote service for the subscribed relay terminal The upper limit of the data transmission rate of the terminal; the AMF sends the fourth AMBR of the relay terminal to the access network device, and the access network device is the access network device accessed by the relay terminal. The method provided in the sixth aspect provides a method for enabling the access network device to determine the upper limit of the data transmission rate of the remote terminal served by the subscribed relay terminal.

In a possible implementation manner, the method further includes: the AMF sends third indication information to the PCF, where the third indication information is used to indicate that the relay terminal is capable of providing relay services.

In a seventh aspect, a communication method is provided, including: SMF receives the AMBR of a first PDU session from UDM, the first PDU session is used by a relay terminal to provide a relay service for the first remote terminal; and the SMF is sent to an access network device AMBR of the first PDU session. The method provided in the seventh aspect provides a method for the access network device to determine the AMBR of the PDU session.

In a possible implementation manner, the AMBR of the first PDU session is the AMBR corresponding to the first PDU session when the relay service is provided. The method further includes: SMF sends fourth and fifth indication information to UDM, and the first The fourth indication information is used to indicate the session attributes of the first PDU session, and the fifth indication information is used to indicate that the first PDU session is used to provide a relay service. This possible implementation provides a more specific method for the access network device to determine the AMBR of the PDU session.

In an eighth aspect, a communication method is provided, including: UDM receives fourth indication information and fifth indication information from SMF, the fourth indication information is used to indicate the session attribute of the first PDU session, and the fifth indication information is used to indicate the first PDU session. One PDU session is used to provide relay services, and the first PDU session is used to relay terminals to provide relay services to the first remote terminal; UDM sends the AMBR of the first PDU session to the SMF according to the fourth indication information and the fifth indication information, The AMBR of the first PDU session is the AMBR corresponding to the first PDU session when the relay service is provided. The method provided by the eighth aspect provides a method for making the SMF determine the AMBR of the PDU session.

In a ninth aspect, a communication device is provided, including: a processing unit; a processing unit for determining a first AMBR of a relay terminal, the communication device is a communication device accessed by the relay terminal, and the relay terminal is a remote terminal Provide relay service, the first AMBR is the sum of the AMBR of the first group of PDU sessions of the relay terminal, the first group of PDU sessions is used to carry the data of the relay terminal; the processing unit is also used to use the third AMBR to relay The data transmission rate of the terminal is controlled; where the third AMBR is the smaller value of the first AMBR and the second AMBR, and the second AMBR is the upper limit of the data transmission rate of the subscribed relay terminal.

In a possible implementation manner, the apparatus further includes: a communication unit; the communication unit is configured to receive first indication information from the first device, where the first indication information is used to indicate that the first PDU session is used to provide a relay service, The first PDU session is used by the relay terminal to provide a relay service for the first remote terminal, the first group of PDU sessions does not include the first PDU session, and the first remote terminal is one of the remote terminals served by the relay terminal; the processing unit, It is specifically used to determine the first AMBR of the relay terminal based on the first indication information.

In a possible implementation manner, the communication unit is further configured to receive second indication information from the first device, the second indication information is used to indicate that the second PDU session is used for providing relay services, and the second PDU session is used for middle After the terminal provides a relay service for the second remote terminal, the first group of PDU sessions does not include the second PDU session, and the second remote terminal is one of the remote terminals served by the relay terminal; the processing unit is specifically configured to: One indication information and second indication information determine the first AMBR.

In a possible implementation manner, the communication unit is further configured to receive the fourth AMBR of the relay terminal from the AMF, where the fourth AMBR is the upper limit of the data transmission rate of the remote terminal served by the subscribed relay terminal; the processing unit, It is also used to use the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal; where the sixth AMBR is the smaller of the fourth AMBR and the fifth AMBR, and the fifth AMBR is the relay terminal’s The sum of the AMBR of the second group of PDU sessions. The second group of PDU sessions is used to carry the data of the remote terminal served by the relay terminal.

In a possible implementation manner, the communication unit is further configured to receive the AMBR of the first PDU session from the SMF; the processing unit is further configured to determine the fifth AMBR based on the AMBR of the first PDU session.

In a tenth aspect, a communication device is provided, including: a communication unit and a processing unit; the communication unit is further configured to receive a fourth AMBR of the relay terminal from the AMF, and the fourth AMBR is the remote terminal serviced by the subscribed relay terminal. The upper limit of the data transmission rate; the processing unit is also used to use the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal; where the sixth AMBR is the smaller of the fourth AMBR and the fifth AMBR Value, the fifth AMBR is the sum of the AMBR of the second group of PDU sessions of the relay terminal, and the second group of PDU sessions is used to carry data of the remote terminal served by the relay terminal.

In an eleventh aspect, a communication device is provided, including: a processing unit and a communication unit; the processing unit is configured to obtain first indication information, where the first indication information is used to indicate that the first PDU session is used to provide a relay service; A PDU session is used for the relay terminal to provide a relay service for the first remote terminal; the communication unit is used for sending the first indication information to the access network device, and the access network device is the access network device accessed by the relay terminal.

In a possible implementation manner, the communication device is an SMF or AMF or a relay terminal.

In a possible implementation manner, when the communication device is SMF or AMF, the processing unit is specifically configured to: receive the first indication information from the relay terminal through the communication unit; or, receive the first indication information from the relay terminal through the communication unit. The identifier of the remote terminal and the identifier of the first PDU session, and the first indication information is determined according to the identifier of the first remote terminal and the identifier of the first PDU session; or, the remote terminal report is received from the relay terminal through the communication unit, and the remote terminal report is The report confirms the first indication information, and the remote terminal report carries the identifier of the first PDU session.

In a possible implementation manner, the processing unit is specifically configured to: receive a message from the relay terminal through the communication unit, and the message carries the identity of the first remote terminal, the identity of the relay terminal, and the identity of the first PDU session; The identifier of a remote terminal, the identifier of the relay terminal, and the identifier of the first PDU session determine the first indication information.

In a possible implementation manner, when the communication device is a relay terminal, the communication unit is specifically configured to: send the first indication information to the access network device through an RRC message.

In a twelfth aspect, a communication device is provided, including: a processing unit and a communication unit; the processing unit is configured to establish a first PDU session, and the first PDU session is used by the communication device to provide a relay service for a first remote terminal; communication The unit is used to notify the first device that the communication device provides a relay service for the first remote terminal through the first PDU session, and the first device is SMF or AMF.

In a possible implementation manner, the communication unit is specifically configured to send the identifier of the first remote terminal and the identifier of the first PDU session to the first device.

In a possible implementation manner, the communication unit is specifically configured to send a message to the first device, and the message carries the identifier of the first remote terminal, the identifier of the communication device, and the identifier of the first PDU session.

In a possible implementation manner, the communication unit is specifically configured to send first indication information to the first device, where the first indication information is used to indicate that the first PDU session is used to provide a relay service for the first remote terminal.

In a thirteenth aspect, a communication device is provided, including: a processing unit and a communication unit; a processing unit, configured to establish a first PDU session, and the communication device provides a relay service for a first remote terminal through the first PDU session; a communication unit , Used to send a remote terminal report to the first device, the remote terminal report carries the identifier of the first PDU session, and the first device is SMF or AMF.

In a fourteenth aspect, a communication device is provided, including: a processing unit and a communication unit; the processing unit is configured to receive the fourth AMBR of the relay terminal from the PCF through the communication unit, and the relay terminal is configured to provide relays for the remote terminal Service, the fourth AMBR is the upper limit of the data transmission rate of the remote terminal served by the subscribed relay terminal; the processing unit is also used to send the fourth AMBR of the relay terminal to the access network device through the communication unit, the access network device It is the access network equipment that the relay terminal accesses.

In a possible implementation manner, the processing unit is further configured to send third indication information to the PCF through the communication unit, and the third indication information is used to indicate that the relay terminal is capable of providing relay services.

In a fifteenth aspect, a communication device is provided, including: a processing unit and a communication unit; the processing unit is configured to receive the AMBR of the first PDU session from the UDM through the communication unit, and the first PDU session is used to relay the terminal as the first The remote terminal provides a relay service; the processing unit is also used to send the AMBR of the first PDU session to the access network device through the communication unit.

In a possible implementation manner, the AMBR of the first PDU session is the AMBR corresponding to the first PDU session when the relay service is provided. The processing unit is further configured to: send the fourth indication information and the fifth indication information to the UDM through the communication unit. Indication information, the fourth indication information is used to indicate the session attribute of the first PDU session, and the fifth indication information is used to indicate that the first PDU session is used to provide a relay service.

In a sixteenth aspect, a communication device is provided, including: a processing unit and a communication unit; the processing unit is configured to receive fourth instruction information and fifth instruction information from the SMF through the communication unit, and the fourth instruction information is used to indicate the first The session attribute of the PDU session, the fifth indication information is used to indicate that the first PDU session is used to provide relay services, and the first PDU session is used to provide relay services for the first remote terminal by the relay terminal; the processing unit is also used for The fourth indication information and the fifth indication information send the AMBR of the first PDU session to the SMF through the communication unit, and the AMBR of the first PDU session is the AMBR corresponding to the first PDU session when the relay service is provided.

In a seventeenth aspect, a communication device is provided, including a processor. The processor is connected to the memory, and the memory is used to store computer-executable instructions, and the processor executes the computer-executable instructions stored in the memory, so as to implement any one of the methods provided in any one of the first aspect to the eighth aspect. Exemplarily, the memory and the processor may be integrated together, or may be independent devices. In the latter case, the memory may be located in the communication device or outside the communication device.

In a possible implementation manner, the processor includes a logic circuit, and also includes at least one of an input interface and an output interface. Exemplarily, the output interface is used to execute the sending action in the corresponding method, and the input interface is used to execute the receiving action in the corresponding method.

In a possible implementation manner, the communication device further includes a communication interface and a communication bus, and the processor, the memory, and the communication interface are connected through the communication bus. The communication interface is used to perform the sending and receiving actions in the corresponding method. The communication interface may also be called a transceiver. Optionally, the communication interface includes at least one of a transmitter and a receiver. In this case, the transmitter is used to perform the sending action in the corresponding method, and the receiver is used to perform the receiving action in the corresponding method.

In a possible implementation manner, the communication device exists in the form of a chip product.

In an eighteenth aspect, a chip is provided, including: a processor and an interface, the processor is coupled to the memory through the interface, and when the processor executes a computer program or instruction in the memory, any of the first to eighth aspects is Any one of the methods provided by one aspect is executed.

According to a nineteenth aspect, a communication system is provided, including: the communication devices provided in the aforementioned ninth to sixteenth aspects.

In a twentieth aspect, a computer-readable storage medium is provided, including instructions, which when run on a computer, cause the computer to execute any one of the methods provided in any one of the first to eighth aspects.

In a twenty-first aspect, a computer program product containing instructions is provided, which when the instructions are run on a computer, cause the computer to execute any one of the methods provided in any one of the first to eighth aspects.

For the technical effects brought about by any one of the implementation manners of the ninth aspect to the twenty-first aspect, refer to the technical effects brought about by the corresponding implementation manners of the first aspect to the eighth aspect, which will not be repeated here.

It should be noted that, provided that the solutions are not contradictory, the solutions in the above-mentioned aspects can be combined.

Description of the drawings

Figure 1 is a schematic diagram of a terminal relay scenario;

Figure 2 is a schematic diagram of a PDU session provided by an embodiment of the application;

FIG. 3 is a schematic diagram of another PDU session provided by an embodiment of the application;

FIG. 4 is a schematic diagram of a relationship between a PDU session and a QoS flow provided by an embodiment of this application;

FIG. 5 is a schematic diagram of another terminal relay scenario provided by an embodiment of the application;

Figure 6 is a schematic diagram of the architecture of the 5G system;

FIG. 7 is a flowchart of a communication method provided by an embodiment of this application;

8 to 15 are respectively interaction flowcharts of a communication method provided by embodiments of this application;

Figure 16 is a schematic diagram of the architecture of the 4G system;

17 to 20 are respectively interaction flowcharts of a communication method provided by embodiments of this application;

FIG. 21 is a schematic diagram of the composition of a communication device provided by an embodiment of this application;

FIG. 22 is a schematic diagram of the hardware structure of a communication device provided by an embodiment of the application.

Detailed ways

Before introducing this application, first introduce and explain the technical terms involved in the embodiments of this application.

1. Protocol data unit (protocol data unit, PDU) session, quality of service (QoS) flow (Flow)

Referring to Figure 2, a PDU session is a connection between a terminal and a data network (data network, DN), and is used to provide PDU connection services. Among them, the PDU session type may be a protocol (Internet protocol, IP) connection, Ethernet connection, or unstructured data connection between networks. The PDU connection service supported by the core network of the fifth generation (5th Generation, 5G) system refers to a service that provides PDU exchange between a terminal and a DN determined by a data network name (DNN). The terminal can initiate the establishment of one or more PDU sessions to connect to the same DN or different DNs. For example, in Figure 2, the terminal initiates the establishment of PDU session 1 and PDU session 2 to connect to the same DN.

As shown in FIG. 3, it is a schematic diagram of a PDU session provided by an embodiment of this application. In Figure 3, the terminal initiates the establishment of PDU Session 1, PDU Session 2, and PDU Session 3. Among them, PDU session 1 and PDU session 2 are connected to DN1 through different user plane function (UPF) network elements, and PDU session 3 is connected to DN2. The PDU session of the terminal described in this application can be understood as a PDU session triggered by the terminal.

Each PDU session has corresponding attributes (hereinafter referred to as session attributes). The session attributes of a PDU session refer to information such as the DNN and slice type corresponding to the PDU session. Exemplarily, the slice type may be single network slice selection assistance information (S-NSSAI), etc. Exemplarily, referring to FIG. 2, if PDU session 1 and PDU session 2 respectively correspond to different slice types, the session attributes of PDU session 1 and PDU session 2 are different.

A QoS flow is the finest QoS differentiation granularity in a PDU session, and a QoS flow identity (QoS flow identity, QFI) is used to identify a QoS flow. A PDU session can include multiple QoS flows, and each QoS flow can carry multiple services. Exemplarily, as shown in FIG. 4, a PDU session includes three QoS flows, namely QoS flow 1, QoS flow 2, and QoS flow 3. In a QoS flow, the QoS of different services is the same.

2. Protocol data network (protocol data network, PDN) connection (connection or connectivity), evolved packet system (evolved packet system, EPS) bearer (hereinafter referred to as bearer)

The PDN connection is a combination of a set of bearers established on the terminal in the 4th Generation (4G) system. These bearers have the same IP address and access point name (APN). The bearer is in the 4G system The data transmission channel. On the terminal and network side, a PDN connection is identified by the IP address and APN.

The default bearer refers to a bearer that is established at the same time that the PDN connection is established. A dedicated bearer refers to a bearer established to meet specific QoS requirements after the PDN connection is established. Among them, a PDN connection may include multiple dedicated bearers and one default bearer.

Among them, the attribute of the bearer may be the APN corresponding to the bearer. The PDN connection in the 4G system is similar to the PDU session in the 5G system, and the APN in the 4G system is similar to the DNN in the 5G system.

3. Guaranteed bit rate (guaranteed bit rate, GBR), non-guaranteed bit rate (non-guaranteed bit rate, Non GBR)

Taking the 5G system as an example, GBR refers to the minimum bit rate that the system guarantees for QoS flows. Even when network resources are tight, the corresponding bit rate can be maintained. Non-GBR means that in the case of network congestion, the bearer or QoS flow needs to bear the requirement of reducing the speed. Since the QoS flow of Non-GBR does not need to occupy fixed network resources, it can be established for a long time.

In the 4G system, the concepts of GBR and Non-GBR also exist, and it is only necessary to replace the QoS flow in the corresponding explanation of the 5G system with the bearer.

4. Aggregate maximum bit rate (AMBR)

In the 5G system, there are concepts such as terminal AMBR (UE-AMBR), terminal subscription AMBR (Subscribed-UE-AMBR), session AMBR (Session-AMBR), etc., which will be introduced separately below.

The AMBR of a terminal defines the upper limit of the sum of the bit rates of all Non-GBR QoS streams of a terminal, that is, the sum of the bit rates of all Non-GBR QoS streams of a terminal cannot be greater than the AMBR of the terminal. The AMBR of the terminal is the AMBR that is actually used to control the sum of the bit rates of all Non-GBR QoS streams of the terminal.

The AMBR (Subscribed-UE-AMBR) subscribed by the terminal is the upper limit of the sum of the bit rates of all Non-GBR QoS streams subscribed, and is stored in unified data management (UDM). The AMBR subscribed by the terminal is used to determine the AMBR of the terminal.

The AMBR of a session defines the upper limit of the sum of the bit rates of all Non-GBR QoS flows of a PDU session, that is, the sum of the bit rates of all Non-GBR QoS flows of a PDU session cannot be greater than that of the PDU session. AMBR. According to the different session attributes of the PDU session, the AMBR of different PDU sessions may be different.

In the 4G system, there are also the concepts of AMBR of the terminal and AMBR of the terminal contract. It is only necessary to replace the QoS flow in the corresponding explanation of the 5G system with the bearer for understanding.

The concept of AMBR of APN also exists in the 4G system. Similar to the AMBR of the session, the AMBR of the APN defines the upper limit of the sum of the bit rates of all the non-GBR bearers of an APN, that is, the sum of the bit rates of all the non-GBR bearers of an APN cannot be greater than this APN's AMBR. The AMBR of different APNs may be different. In the following description of this application, "bearing the corresponding ANBR" means "bearing the AMBR of the corresponding APN".

Based on the understanding of the foregoing concepts, the following introduces the relevant content of the method provided in the embodiments of the present application.

The method provided in the embodiments of the present application can be applied to a terminal relay scenario, and in particular, can be applied to a terminal relay scenario of L3 relay. In the terminal relay scenario of L3 relay, the remote terminal uses the PDU session of the relay terminal to transmit data, and the relay terminal forwards the data of the remote terminal based on the IP address. The terminal relay scenario is not limited to the scenario shown in FIG. 1, and may also be other terminal relay scenarios (for example, the scenario shown in FIG. 5), which is not limited in this application.

In the terminal relay scenario, there can be one-to-many communication between the relay terminal and the remote terminal (that is, the relay terminal provides relay services for multiple remote terminals), or one-to-one communication (One-to-one communication). to one communication) (that is, the relay terminal provides relay services for 1 remote terminal). One-to-many communication corresponds to multicast communication and broadcast communication, and one-to-one communication corresponds to unicast communication.

In one-to-one communication, if two terminals are within a short distance, they can communicate directly after discovering each other. The terminals communicate through the PC5 interface, for example, the data plane and/or control plane information is transmitted through the PC5 interface. The communication link for direct communication between the terminal and the terminal may be referred to as a side link (SL) or a side link.

Among them, the technical solutions of the embodiments of the present application can be specifically applied to 4G systems, various systems based on 4G system evolution, 5G systems, and various systems based on 5G system evolution.

In the following, the method provided in the embodiments of the present application is applied to the 5G system and the 4G system as an example for description, and the specific description is made through the first part and the second part below. Among them, the first part is used to describe the architecture of the 5G system, the problems in the 5G system, the implementation process of the method provided in the embodiment of the application in the 5G system, etc., and the second part is used to describe the architecture of the 4G system and the existing problems in the 4G system. Problem, the implementation process of the method provided in the embodiment of the application in the 4G system, etc.

Part 1: 5G system

Fig. 6 exemplarily shows a schematic diagram of a network architecture of a 5G system. In this schematic diagram, the 5G system may include: authentication server function (authentication server function, AUSF) network elements, access and mobility management function (core access and mobility management function, AMF) network elements, DN, UDM network elements, policies Control function (policy control function, PCF) network element, (radio) access network ((radio) access network, (R) AN) network element, UPF network element, terminal (terminal), application function (AF) Network element, session management function (SMF) network element, network exposure function (NEF) network element, network function repository function (NRF) network element, unified database (unified data repository) , UDR) network element.

It should be noted that (R) AN network element, AMF network element, SMF network element, AUSF network element, UDM network element, UPF network element and PCF network element in Figure 6 are only a name, and the name refers to the network element itself. Does not constitute a limitation. In 5G networks and other networks in the future, the network elements or devices corresponding to these network elements may also have other names, which are not specifically limited in the embodiment of this application. For example, UDM network elements may also be replaced with user home server (home subscriber server, HSS) or user subscription database (USD) or database network elements, etc., which are uniformly explained here and will not be repeated here. .

For the convenience of description, in the following, (R)AN network element, AMF network element, SMF network element, UDM network element, UPF network element, PCF network element, etc. are respectively passed through (R)AN, AMF, SMF, UDM, UPF, PCF And so on.

The terminal, (R)AN, UPF, and DN in Figure 6 are generally referred to as user plane network elements. User data traffic can be transmitted through the PDU session established between the terminal and DN, and the transmission will go through (R)AN and UPF These two network elements. Among them, the user plane is used for service data bearing. The other network elements in Figure 6 are called control plane network elements, which are mainly responsible for functions such as authentication and authentication, registration management, session management, mobility management, and policy control, so as to achieve reliable and stable transmission of user-level traffic. Among them, the control plane is used to carry signaling messages.

Figure 6 shows the interaction relationship between the network elements and the corresponding interface. For example, the UE and the AMF can interact through the N1 interface, and the interaction message is called the N1 message (Message). Part of the interface is implemented as a service interface.

The functions of each network element in Figure 6 are as follows:

PCF has functions such as providing policy rules to control plane network elements.

UDM has functions such as managing the user's contract data and generating user authentication information.

AF can be an application server, which can belong to an operator or a third party. It mainly supports the interaction with the 3rd generation partnership project (3rd generation partnership project, 3GPP) core network to provide services, such as influencing data routing decisions, policy control functions, or providing third-party services to the network side.

(R)AN, a network composed of multiple access network devices (also known as RAN nodes), which implements wireless physical layer functions, resource scheduling and wireless resource management, wireless access control and mobility management functions, and quality of service management , Data compression and encryption functions. The access network equipment is connected to the UPF through the user plane interface N3, and is used to transmit terminal data. The access network equipment establishes a control plane signaling connection with the AMF through the control plane interface N2, which is used to implement functions such as radio access bearer control.

AMF is mainly responsible for the signaling processing part, such as terminal registration management, terminal connection management, terminal reachability management, terminal access authorization and access authentication, terminal security functions, terminal mobility management, Functions such as network slice selection, SMF selection, and terminal attachment and detachment. The AMF serves as the anchor point for the N1 and N2 signaling connection and provides the N1/N2 interface session management (SM) message routing for the SMF; maintains and manages terminal state information. When the AMF network element provides services for the session in the terminal, it will provide storage resources of the control plane for the session to store the session identifier, the SMF identifier associated with the session identifier, and so on.

SMF is mainly responsible for all control plane functions of terminal session management, including UPF selection, control and redirection, IP address allocation and management, session QoS management, and policy and charging control (PCC) obtained from PCF Strategies, bearer establishment, modification and release, etc. SMF is also used as the termination point of the SM part in the non-access stratum (NAS) message.

UPF, as the anchor point of the PDU session connection, is responsible for the terminal's data message filtering, data transmission/forwarding (for example, forwarding the data exchanged between the access network device and the DN), rate control, generating billing information, User plane QoS processing, uplink transmission authentication, transmission level verification, downlink data packet buffering, and downlink data notification triggering. UPF can also be used as a branch point for multi-homed PDU sessions. The transmission resources and scheduling functions that provide services for terminals in UPF are managed and controlled by SMF.

The terminal can be a wireless terminal or a wired terminal. A wireless terminal may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. A certain air interface technology (such as a new radio (NR) technology or a long term evolution (LTE) technology) is used between the terminal and the access network equipment to communicate with each other. A certain air interface technology (such as NR technology or LTE technology) can also be used between terminals to communicate with each other. The wireless terminal can communicate with one or more core network devices via the access network device, such as communicating with AMF, SMF, etc. The wireless terminal can be a mobile terminal, such as a mobile phone (or called a "cellular" phone), a smart phone, a satellite wireless device, a wireless modem card, and a computer with a mobile terminal. For example, it can be a laptop, portable, pocket-sized, Handheld, built-in computer or vehicle-mounted mobile devices that exchange voice and/or data with access network equipment. Exemplarily, the wireless terminal may be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, and a personal digital Assistant (personal digital assistant, PDA), VR glasses, AR glasses, machine type communication terminal and other equipment. In the vehicle networking communication, the communication equipment mounted on the vehicle is a kind of terminal, and the roadside unit (RSU) can also be used as a kind of terminal. The communication equipment mounted on the drone can also be regarded as a kind of terminal. The wireless terminal can also be called UE, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, Access terminal (access terminal), user terminal (user terminal), user agent (user agent), etc.

It is understandable that in addition to the functional network elements shown in FIG. 6, the network architecture of the 5G network may also include other functional network elements. For example, a network exposure function (NEF) network element may also be included between the AF network element and the PCF network element, which may be used to exchange internal and external information of the network. In the embodiments of this application, the network element may also be referred to as an entity or a device.

At present, in the terminal relay scenario of the 5G system, the access network equipment uses the sum of the AMBR of the PDU session of the relay terminal, and the smaller value of the AMBR subscribed by the relay terminal, to the data transmission rate of the relay terminal (E.g. bit rate) for control. However, the PDU sessions of the relay terminal can be divided into two groups. The first group of PDU sessions is used to carry data of the relay terminal, and the second group of PDU sessions is used to carry data of the remote terminal served by the relay terminal. According to the current data transmission rate control method, there is no distinction between the first group of PDU sessions and the second group of PDU sessions of the relay terminal. Both groups of PDU sessions are taken into consideration when determining the sum of the AMBR of the relay terminal's PDU sessions. , Neither can accurately control the data transmission rate of the relay terminal, nor can it accurately control the data transmission rate of the remote terminal served by the relay terminal.

In order to more accurately control the data transmission rate, a communication method is provided in the first part. In this communication method, the access network equipment can only control the data transmission rate of the relay terminal (denoted as scheme 1), or it can only control the data transmission rate of the remote terminal served by the relay terminal (denoted as As scheme 2), the data transmission rate of each remote terminal can also be controlled (denoted as scheme 3). Any two of the schemes 1 to 3 can be combined, and scheme 1, scheme 2 and scheme 3 can also be combined, and only the corresponding schemes need to be combined.

The scheme 1 to scheme 3 are respectively explained below.

Solution 1: The access network equipment controls the data transmission rate of the relay terminal.

Referring to Figure 7, the implementation process of Scheme 1 includes:

701. The access network device determines the first AMBR of the relay terminal.

Among them, the access network equipment is the access network equipment accessed by the relay terminal, and the relay terminal is used to provide a relay service for the remote terminal. Exemplarily, the relay terminal may provide relay services for one remote terminal, or may provide relay services for multiple remote terminals.

The first AMBR is the sum of the AMBR of the first group of PDU sessions of the relay terminal. The first group of PDU sessions is used to carry the data of the relay terminal.

The first group of PDU sessions may include one or more PDU sessions. If the first group of PDU sessions includes a PDU session, the access network device may determine the AMBR of the PDU session as the first AMBR. If the first group of PDU sessions includes multiple PDU sessions, the access network device may add the AMBRs of the multiple PDU sessions to obtain the first AMBR.

The data of the relay terminal may include data that ends at the relay terminal and/or data that starts from the relay terminal, but does not include the data of the remote terminal that is forwarded to provide a relay service for the remote terminal. Among them, the data that terminates at the relay terminal refers to the data that the relay terminal receives from the access network device and is no longer forwarded to the remote terminal. The data starting from the relay terminal refers to the data sent by the relay terminal to the access network device, and is not the data received from the remote terminal.

702. The access network device uses the third AMBR to control the data transmission rate of the relay terminal.

Wherein, the third AMBR is the smaller value of the first AMBR and the second AMBR. The second AMBR is the AMBR subscribed by the relay terminal, that is, the upper limit of the data transmission rate of the subscribed relay terminal.

Optionally, before step 702, the method further includes: the AMF sends the second AMBR to the access network device. Correspondingly, the access network device receives the second AMBR from the AMF.

Exemplarily, the second AMBR may be carried in a next generation application protocol (NGAP) message (NGAP message). For example, an initial context setup request (initial context setup request) message.

Among them, AMF can obtain the second AMBR from UDM or PCF.

If the AMF obtains the second AMBR from the UDM, the AMF may obtain the subscription data of the relay terminal from the UDM in the registration process of the relay terminal, and the subscription data of the relay terminal may include the second AMBR. If the AMF obtains the second AMBR from the PCF, the AMF may obtain the second AMBR from the PCF in the access management (access management, AM) policy association (policy association) process. Among them, the AM policy association process is used by the AMF to obtain policy information related to access management from the PCF.

In step 702, when the access network equipment uses the third AMBR to control the data transmission rate of the relay terminal, it is ensured that the data transmission rate of the relay terminal is not greater than the third AMBR, that is, it is ensured that at the same time, the first group The sum of the data carried in the PDU session is not greater than the third AMBR.

It should be noted that the data of the relay terminal in the embodiment of the present application is specifically the data of the QoS flow of Non-GBR used to carry the data of the relay terminal among all the Non-GBR QoS flows of the relay terminal. The data carried by the first group of PDU sessions is specifically the data of all Non-GBR QoS flows in the first group of PDU sessions.

In the method provided in Solution 1, the access network device determines the smaller value of the first AMBR and the second AMBR as the AMBR used to control the data transmission rate of the relay terminal. Compared with the prior art, the first AMBR only considers the AMBR of the first group of PDU sessions, and does not consider the AMBR of the second group of PDU sessions, thereby more accurately controlling the data transmission rate of the relay terminal.

When step 701 is specifically implemented, the access network device may determine other PDU sessions except the second group of PDU sessions as the first group of PDU sessions. The second group of PDU sessions is used to carry the data of the remote terminal served by the relay terminal.

Among them, the data of the remote terminal served by the relay terminal includes data ending in the remote terminal and/or data starting from the remote terminal. Among them, the data terminating at the remote terminal refers to the data sent by the access network device and that needs to be forwarded by the relay terminal to the remote terminal. The data starting from the remote terminal refers to the data received by the access network device, generated by the remote terminal, and need to be forwarded by the relay terminal.

Wherein, which PDU sessions belong to the second group of PDU sessions may be indicated by the first device to the access network device. Optionally, the first device is SMF or AMF or a relay terminal.

Taking the first PDU session in the second group of PDU sessions as an example, the first device instructs the first PDU session to provide relay services. The specific process may include:

11) The first device obtains first indication information (for example, relay indication), the first indication information is used to indicate that the first PDU session is used to provide relay services, and the first PDU session is used to relay the terminal as the first The remote terminal provides relay services.

It can be understood that the first group of PDU sessions does not include the first PDU session, and the first remote terminal is one of the remote terminals served by the relay terminal.

12) The first device sends the first indication information to the access network device. Correspondingly, the access network device receives the first indication information from the first device.

Optionally, in a case where the first device is a relay terminal, the first device sends the first indication information to the access network device through a radio resource control (radio resource control, RRC) message. Exemplarily, the RRC message may be an RRC reconfiguration complete (RRC reconfiguration complete) message.

Based on the above step 11) and step 12), when step 701 is specifically implemented, it may include: the access network device determines the first AMBR of the relay terminal based on the first indication information. That is, the access network device does not take the first PDU session into consideration when determining the first AMBR.

It should be noted that when a PDU session is not used to provide relay services, that is, when the PDU session is used to carry data of the relay terminal, the first device may also obtain an indication information (denoted as the ninth indication information). The ninth indication information is used to indicate that the PDU session is not used to provide relay services (or to indicate that the PDU session is used to carry data of the relay terminal), and the first device sends the ninth indication information to the access network device. In this case, if the access network device receives the first indication information, it determines that the corresponding session is used to provide the relay service. Indicating information, it is determined that the corresponding session is not used to provide relay services.

The first indication information and the ninth indication information can be indicated by one bit. For example, when the value of this bit is 1, it means that the corresponding session is used to provide relay services, and when the value of this bit is 0, it means that the corresponding session is not used for the relay service. Provide relay services. The reverse is also possible. The first indication information and the ninth indication information may also be indicated by different bits, which is not limited in this application.

In the case where the first device is SMF or AMF, the above step 11) can be implemented in any one of the following manners 1 to 3. In the first and second modes, in order for the first device to obtain the first indication information, the relay terminal may notify the first device that the relay terminal provides a relay service for the first remote terminal through the first PDU session. In the following, methods 1 to 3, step 12) under Mode 1 to Mode 3, and implementations of other methods included in this application under Mode 1 to Mode 3 are respectively introduced.

Manner 1: The first device receives the first indication information from the relay terminal.

In the first mode, the relay terminal notifies the first device that the relay terminal provides a relay service for the first remote terminal through the first PDU session, which may include:

11-A1) The relay terminal establishes the first PDU session.

11-A2) The relay terminal sends the first indication information to the first device.

Wherein, after establishing a PDU session, the relay terminal can know whether the PDU session belongs to the first group of PDU sessions or the second group of PDU sessions. For the second group of PDU sessions, for example, the first PDU session, the relay terminal may send the first indication information to the first device.

In the embodiment of the present application, in the case where the first device is an SMF, the SMF and the relay terminal may communicate through AMF.

In the case where the first device is an SMF, in the first implementation of step 11-A2), the relay terminal may carry the first indication information in a PDU session establishment request (PDU session establishment request) and send it to the AMF. After receiving the first indication information, the first indication information is carried in an SM context request (SM context request) and sent to the SMF.

In the case where the first device is SMF, in the second implementation of step 11-A2), the relay terminal can carry the first indication information in the Remote UE Report and send it to the AMF, and the AMF will receive it. The received remote terminal report is sent to the SMF, and the SMF obtains the first indication information from the remote terminal report.

Based on the two implementations of the above step 11-A2), in step 12), in the specific implementation, the SMF can carry the first indication information in the N1N2 transmission message (N1N2MessageTransfer) and send it to the AMF, and the AMF then carries the first indication information in The NGAP message (for example, N2 PDU session request (N2 PDU session request)) is sent to the access network device.

In the case where the first device is an AMF, step 11-A2) During specific implementation, the relay terminal may carry the first indication information in the PDU session establishment request or the remote terminal report and send it to the AMF. In this case, when step 12) is specifically implemented, the AMF may carry the first indication information in the NGAP message (for example, N2 PDU session request) and send it to the access network device.

Manner 2: The first device receives the identifier of the first remote terminal and the identifier of the first PDU session from the relay terminal, and determines the first indication information according to the identifier of the first remote terminal and the identifier of the first PDU session.

Wherein, "determine the first indication information" in the embodiment of the present application may also be replaced with "generate the first indication information".

In the second mode, the relay terminal notifies the first device that the relay terminal provides the relay service for the first remote terminal through the first PDU session, which may include:

11-B1) The relay terminal establishes the first PDU session.

11-B2) The relay terminal sends the identification of the first remote terminal and the identification of the first PDU session to the first device.

In the case where the first device is SMF, in the first implementation of step 11-B2), the relay terminal may carry the identification of the first remote terminal and the identification of the first PDU session in the PDU session establishment request and send it to AMF: After receiving the identifier of the first remote terminal and the identifier of the first PDU session, the AMF carries the identifier of the first remote terminal and the identifier of the first PDU session in the SM context request and sends it to the SMF.

In the case where the first device is an SMF, in the second implementation of step 11-B2), the relay terminal can carry the identification of the first remote terminal and the identification of the first PDU session in the remote terminal report and send it to the AMF , The AMF sends the received remote terminal report to the SMF, and the SMF obtains the identifier of the first remote terminal and the identifier of the first PDU session from the remote terminal report.

Based on the two implementation manners of the above step 11-B2), when the second manner is specifically implemented, the SMF determines the first indication information according to the identification of the first remote terminal and the identification of the first PDU session. In this case, when step 12) is specifically implemented, the SMF may carry the first indication information in the N1N2 transmission message and send it to the AMF, and then the AMF may carry the first indication information in the NGAP message (for example, N2 PDU session request) and send it To the access network equipment.

In the case that the first device is AMF, step 11-B2) In specific implementation, the relay terminal may carry the identification of the first remote terminal and the identification of the first PDU session in the PDU session establishment request or remote terminal report and send To AMF. In the second mode, in specific implementation, the AMF determines the first indication information according to the identifier of the first remote terminal and the identifier of the first PDU session. In this case, when step 12) is specifically implemented, the AMF may carry the first indication information in the NGAP message (for example, N2 PDU session request) and send it to the access network device.

It should be noted that, in step 11-B2), the information transmitted between the relay terminal and the first device may include the identification of the relay terminal in addition to the identification of the first remote terminal and the identification of the first PDU session. In this case, in the above description of the specific implementation of step 11-B2) and mode 2, replace "the identification of the first remote terminal and the identification of the first PDU session" with "the identification of the first remote terminal, the relay terminal And the identity of the first PDU session" to understand.

Optionally, the "identity of the first remote terminal, the identity of the relay terminal, and the identity of the first PDU session" may be carried in the message. In this case, step 11-B2) includes the following in specific implementation: The first device sends a message, and the message carries the identifier of the first remote terminal, the identifier of the relay terminal, and the identifier of the first PDU session. Correspondingly, the first device receives the message from the relay terminal. At this time, in specific implementation, the second method may include: the first device determines the first indication information according to the identifier of the first remote terminal, the identifier of the relay terminal, and the identifier of the first PDU session.

Wherein, in a case where the first device is an AMF, the message may be a non-access stratum (Non-access stratum, NAS) message.

In the various embodiments of the first part of this application, the identifier of the terminal (for example, a remote terminal or a relay terminal) may be a 5G globally unique temporary identifier (5G-GUTI), an international mobile subscriber identification code (international) mobile subscriber identity, IMSI), application layer identity, etc.

Manner 3: The first device receives the remote terminal report from the relay terminal, and determines the first indication information according to the remote terminal report. Among them, the remote terminal report carries the identifier of the first PDU session.

Mode 3 In the specific implementation, as long as the first device receives the remote terminal report, it can determine that the PDU session corresponding to the PDU session identifier carried in the remote terminal report is used to provide relay services, that is, the PDU session belongs to the second group. PDU session, without the need to determine through other information. It can also be understood that, according to the message type reported by the remote terminal, the first device can determine that the PDU session corresponding to the PDU session identifier carried in the remote terminal report is used to provide the relay service. This message type can indicate that the current message is reported by a remote terminal.

Under way three, the method can also include:

11-C1) The relay terminal establishes the first PDU session.

11-C2) The relay terminal sends a remote terminal report to the first device.

In the case where the first device is SMF, step 11-C2) In specific implementation, the relay terminal can send a remote terminal report carrying the identifier of the first PDU session to AMF, and AMF sends the received remote terminal report to SMF. In the third mode, in specific implementation, the SMF determines the first indication information according to the remote terminal report. In this case, when step 12) is specifically implemented, the SMF may carry the first indication information in the N1N2 transmission message and send it to the AMF, and then the AMF may carry the first indication information in the NGAP message (for example, N2 PDU session request) and send it To the access network equipment.

In the case where the first device is an AMF, step 11-C2) During specific implementation, the relay terminal may send a remote terminal report carrying the identifier of the first PDU session to the AMF. In the third mode, in specific implementation, the AMF determines the first indication information according to the remote terminal report. In this case, when step 12) is specifically implemented, the AMF may carry the first indication information in the NGAP message (for example, N2 PDU session request) and send it to the access network device.

It is understandable that if other PDU sessions are included in the second group of PDU sessions, the first device may also use a similar method to indicate. For example, if the second group of PDU sessions also includes a second PDU session, the first device instructs the second PDU session to provide relay services. The specific process may include:

21) The first device obtains the second indication information, the second indication information is used to indicate that the second PDU session is used to provide the relay service, and the second PDU session is used to provide the relay service for the second remote terminal by the relay terminal.

It is understandable that the first group of PDU sessions does not include the second PDU session, and the second remote terminal is one of the remote terminals served by the relay terminal. The implementation process of step 21) is similar to that of step 11), which can be understood by reference, and will not be repeated.

22) The first device sends the second indication information to the access network device. Correspondingly, the access network device receives the second indication information from the first device.

Optionally, when the first device is a relay terminal, the first device sends the second indication information to the access network device through an RRC message.

Based on the above step 21) and step 22), when step 701 is specifically implemented, the step 701 may include: the access network device determines the first AMBR based on the first indication information and the second indication information. That is to say, when determining the first AMBR, the access network device does not take the first PDU session and the second PDU session into consideration.

It can be understood that, in addition to the first PDU session and the second PDU session, the second group of PDU sessions may also include other PDU sessions. When determining the first AMBR, the access network device needs to exclude all PDU sessions in the second group of PDU sessions. Therefore, for each PDU session in the second group of PDU sessions, the first device may use a similar manner to the first PDU session and the second PDU session to indicate that the corresponding PDU session is used to provide the relay service.

It is understandable that to calculate the first AMBR, the access network device not only needs to know which PDU sessions belong to the first group of PDU sessions, but also needs to know the AMBR of each PDU session in the first group of PDU sessions. The process for the access network device to obtain the AMBR of each PDU session can be referred to steps 11) to 13) in solution 2. It only needs to replace the first PDU session with the corresponding PDU session in the first group of PDU sessions. Just understand.

Scheme 2: The access network equipment controls the data transmission rate of the remote terminal served by the relay terminal.

Referring to Figure 8, the implementation process of Scheme 2 includes:

801. The AMF receives the fourth AMBR of the relay terminal from the PCF or UDM.

Among them, the relay terminal is used to provide a relay service for the remote terminal, and the fourth AMBR is the upper limit of the data transmission rate of the remote terminal served by the subscribed relay terminal, that is, the AMBR of the subscribed relay terminal for the relay service (Subscribed UE-AMBR for relaying).

Wherein, if the AMF obtains the fourth AMBR from the UDM, the AMF may obtain the subscription data of the relay terminal from the UDM in the registration process of the relay terminal, and the subscription data of the relay terminal may include the fourth AMBR. If the AMF obtains the fourth AMBR from the PCF, the AMF may obtain the fourth AMBR from the PCF during the AM policy association process.

If the AMF obtains the fourth AMBR from the PCF, optionally, the method further includes: the AMF sends third indication information to the PCF, where the third indication information is used to indicate that the relay terminal is capable of providing relay services. Correspondingly, the PCF receives the third indication information from the AMF, and sends the fourth AMBR to the AMF according to the third indication information. The process in which the AMF obtains the fourth AMBR from the UDM is also similar, and will not be repeated here.

Among them, whether a terminal has the ability to provide relay services may be indicated to the AMF when the terminal is registered.

802. The AMF sends the fourth AMBR of the relay terminal to the access network device.

Correspondingly, the access network device receives the fourth AMBR of the relay terminal from the AMF.

Wherein, the access network equipment is the access network equipment accessed by the relay terminal.

Wherein, the fourth AMBR of the relay terminal may be carried in the NGAP message (for example, N2 PDU session request).

803. The access network device uses the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal.

Among them, the sixth AMBR is the smaller value of the fourth AMBR and the fifth AMBR. The fifth AMBR is the sum of the AMBR of the second group of PDU sessions of the relay terminal, and the second group of PDU sessions is used to carry data of the remote terminal served by the relay terminal.

In step 803, when the access network device uses the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal, it is ensured that the data transmission rate of the remote terminal served by the relay terminal is not greater than the sixth AMBR, that is, Ensure that at the same moment, the sum of the data carried by the second group of PDU sessions is not greater than the sixth AMBR.

It should be noted that the data of the remote terminal served by the relay terminal in the embodiment of the present application is specifically the QoS of the Non-GBR of all the non-GBR QoS flows of the relay terminal, which is used to carry the data of all the remote terminals. The data of the flow, the data carried by the second group of PDU sessions are specifically the data of all Non-GBR QoS flows in the second group of PDU sessions.

In the method provided by Scheme 2, the access network device determines the smaller value of the fourth AMBR and the fifth AMBR as the AMBR used to control the data transmission rate of the remote terminal served by the relay terminal. The fifth AMBR only considers the AMBR of the second group of PDU sessions, and does not consider the AMBR of the first group of PDU sessions, so as to more accurately control the data transmission rate of the remote terminal served by the relay terminal.

In order to perform step 803, the access network device determines a fifth AMBR. Optionally, the process for the access network device to determine the fifth AMBR includes:

11) UDM sends the AMBR of the first PDU session to SMF.

Correspondingly, the SMF receives the AMBR of the first PDU session from the UDM.

The first PDU session is used to provide a relay service, that is, the first PDU session is one PDU session in the second group of PDU sessions. The first PDU session is used for the relay terminal to provide a relay service for the first remote terminal.

Step 11) In specific implementation, SMF may send a request message to UDM, and the request message may carry attribute information of the first PDU session. After receiving the request message, UDM may send the AMBR of the first PDU session to SMF.

12) The SMF sends the AMBR of the first PDU session to the access network device.

Correspondingly, the access network device receives the AMBR of the first PDU session from the SMF.

13) The access network device determines the fifth AMBR based on the AMBR of the first PDU session.

In the embodiment of this application, UDM stores the AMBR corresponding to the PDU session of each session attribute, and the AMBR corresponding to the PDU session of each session attribute has two situations:

Case 1. The PDU session of each session attribute corresponds to one AMBR.

Case 2. Each PDU session of each session attribute corresponds to two AMBRs, one AMBR is the corresponding AMBR when the PDU session of this type of session attribute is used to carry the data of the relay terminal, and the other AMBR is the corresponding AMBR of the PDU session of this type of session attribute. The AMBR corresponding to the data of the remote terminal carrying the relay terminal service (that is, used to provide the relay service).

In case 1, the AMBR of the first PDU session is the AMBR corresponding to the first PDU session. In this case, optionally, before step 11), the method further includes: the SMF sends fourth indication information to the UDM, where the fourth indication information is used to indicate the session attributes of the first PDU session. Correspondingly, the UDM receives the fourth indication information from the SMF, and sends the AMBR of the first PDU session to the SMF according to the fourth indication information.

In case 2, the AMBR of the first PDU session is the AMBR corresponding to the first PDU session when the relay service is provided. In this case, optionally, before step 11), the method further includes: SMF sending the foregoing fourth indication information and fifth indication information to UDM, where the fifth indication information is used to indicate that the first PDU session is used to provide relay service. Correspondingly, the UDM receives the fourth indication information and the fifth indication information from the SMF, and sends the AMBR of the first PDU session to the SMF according to the fourth indication information and the fifth indication information.

It is understandable that if other PDU sessions are included in the second group of PDU sessions, the SMF may also use a similar method to obtain the AMBR of the PDU session. For example, if the second group of PDU sessions also includes a second PDU session, the SMF may also determine the AMBR of the second PDU session using a method similar to the first PDU session, and send it to the access network device. In this case, step 13) may include: the access network device determines the fifth AMBR based on the AMBR of the first PDU session and the AMBR of the second PDU session.

It can be understood that, in addition to the first PDU session and the second PDU session, the second group of PDU sessions may also include other PDU sessions. When determining the fifth AMBR, the access network device needs to count all PDU sessions in the second group of PDU sessions.

Before calculating the fifth AMBR, the access network device needs to determine which PDU sessions belong to the second group of PDU sessions. For this process, please refer to the related description in Embodiment 1, and will not be repeated. It should be noted that for the first PDU session, the SMF can carry the first indication information and the AMBR of the first PDU session in the same message and send it to the access network device, or it can also be carried in different messages and sent to the access network device. Network equipment, this application is not limited.

Scheme 3: The access network equipment controls the data transmission rate of each remote terminal.

In the above scheme 1 and scheme 2, multiple PDU sessions can carry data of one remote terminal served by the relay terminal, and one PDU session can also carry data of multiple remote terminals served by the relay terminal. In solution 3, multiple PDU sessions can be used to carry data of one remote terminal served by the relay terminal, but one PDU session can only carry data of one remote terminal served by the relay terminal.

Referring to Figure 9, the implementation process of Scheme 3 includes:

901. The AMF receives the seventh AMBR of the first remote terminal served by the relay terminal from the PCF or UDM.

Among them, the relay terminal is used to provide a relay service for the remote terminal. The first remote terminal can be any remote terminal served by the relay terminal. The seventh AMBR is the AMBR subscribed by the first remote terminal, that is, the upper limit of the data transmission rate of the subscribed first remote terminal.

Among them, the AMBR subscribed by a remote terminal can have the following two situations:

Case 1: There is only one AMBR subscribed by the remote terminal, that is, one remote terminal corresponds to one AMBR. At this time, the AMBR subscribed by the remote terminal in this application is the AMBR corresponding to the remote terminal.

Case 2: There are two AMBRs subscribed by the remote terminal, that is, one remote terminal corresponds to two AMBRs. One AMBR is the corresponding AMBR when the remote terminal directly accesses the access network equipment, and the other is the corresponding AMBR when the remote terminal accesses the access network equipment through the relay terminal. At this time, the AMBR subscribed by the remote terminal in this application is the corresponding AMBR when the remote terminal accesses the access network device through the relay terminal.

The AMF may request the PCF or UDM to obtain the seventh AMBR after receiving the PDU session establishment request or the remote terminal report sent by the relay terminal. Wherein, the PDU session establishment request or the remote terminal report carries the identifier of the first remote terminal. Correspondingly, the AMF sends the request message for obtaining the seventh AMBR to the PCF or UDM, including the identification of the first remote terminal, so that the PCF or UDM feeds back the AMBR of the corresponding remote terminal to the AMF.

902. The AMF sends the seventh AMBR to the access network device. Correspondingly, the access network device receives the seventh AMBR from the AMF.

Among them, the seventh AMBR may be carried in an NGAP message (for example, N2 PDU session request).

903. The access network device uses the ninth AMBR to control the data transmission rate of the first remote terminal served by the relay terminal.

Among them, the ninth AMBR is the smaller value of the seventh AMBR and the eighth AMBR.

Wherein, the eighth AMBR is the sum of the AMBR of the PDU session of the relay terminal used to carry the data of the first remote terminal. Wherein, the process of the access network device acquiring the AMBR of the PDU session (for example, the first PDU session) of the relay terminal used to carry the data of the first remote terminal can refer to step 11) to step 13) in solution 2. Wherein, in step 11) in specific implementation, SMF can send a request message to UDM, the request message can carry the identity of the first remote terminal, after UDM receives the request message, can use the relay terminal to carry the first remote terminal The AMBR of the PDU session (for example, the first PDU session) of the data of the terminal is sent to the SMF. Correspondingly, when the SMF sends the AMBR of the first PDU session to the access network device, it can also send the identification of the first remote terminal to the access network device, so that the access network device can determine which remote terminal bears the first PDU session. PDU session of the data.

In step 903, when the access network device uses the ninth AMBR to control the data transmission rate of the first remote terminal served by the relay terminal, it is ensured that the data transmission rate of the first remote terminal served by the relay terminal is not greater than the ninth AMBR. AMBR.

It should be noted that the data of a certain remote terminal served by the relay terminal in the embodiment of the present application is specifically the Non-GBR used to carry the data of the remote terminal in all the Non-GBR QoS flows of the relay terminal. QoS flow data.

In the method provided in Scheme 3, the access network device determines the smaller value of the seventh AMBR and the eighth AMBR as the AMBR used to control the data transmission rate of the first remote terminal served by the relay terminal. The eighth AMBR only considers the PDU session used to carry the data of the first remote terminal, so as to more accurately control the data transmission rate of the first remote terminal served by the relay terminal.

The above is an overview of the schemes 1 to 3. The implementation process of the schemes mentioned above or the schemes after being combined is exemplified in the following through Embodiments 1 to 6.

Example 1

In Embodiment 1, taking the SMF informing the access network device that the first PDU session is a PDU session providing a relay service as an example, the solution 1 is exemplified.

As shown in Figure 10, the method provided in Embodiment 1 includes:

1001. The AMF obtains the second AMBR (that is, the AMBR subscribed by the relay terminal), and sends it to the access network device.

Wherein, step 1001 can be implemented in the following way a or way b during specific implementation.

Manner a: In the registration process of the relay terminal, the AMF obtains the subscription data of the relay terminal from the UDM, and the subscription data of the relay terminal includes the second AMBR.

Manner b: The AMF obtains the second AMBR from the PCF during the AM policy association process.

1002. The relay terminal sends a PDU session establishment request to the AMF, where the PDU session establishment request carries first indication information. Correspondingly, the AMF receives the PDU session establishment request from the relay terminal.

The PDU session establishment request is used to request the establishment of the first PDU session, and the first indication information is used to indicate that the first PDU session is used to provide a relay service.

The PDU session establishment request can be carried in the NAS message.

1003. The AMF sends an SM context request to the SMF, and the SM context request carries first indication information. Correspondingly, the SMF receives the SM context request from the AMF.

The SM context request is used to request the SMF to establish a session context for the first PDU session.

When step 1003 is specifically implemented, the AMF may carry the first indication information in the PDU session establishment request in the SM context request and send it to the SMF.

1004. The SMF sends an N1N2 transmission message to the AMF. The N1N2 transmission message carries the first indication information and the AMBR of the first PDU session. Correspondingly, the AMF receives the N1N2 transmission message from the SMF.

Among them, the first indication information and the AMBR of the first PDU session may specifically be carried in the N2 SM information (N2 SM info) container in the N1N2 transmission message.

Among them, in the process of establishing the first PDU session, the SMF can send a request message to the UDM, and the request message can carry the attribute information of the first PDU session. After receiving the request message, the UDM can send the AMBR of the first PDU session to SMF. It should be noted that, for each PDU session, the AMBR can be acquired in a manner similar to the first PDU session.

1005. The AMF sends an N2 PDU session request to the access network device, and the N2 PDU session request carries the first indication information. Correspondingly, the access network device receives the N2 PDU session request from the AMF.

The first indication information may be carried in the N2 SM info container in the N2 PDU session request.

The AMF and the access network equipment can communicate through the N2 interface.

1006. The access network equipment uses the third AMBR to control the data transmission rate of the relay terminal. Wherein, the third AMBR is the smaller value of the first AMBR and the second AMBR.

It should be noted that for each PDU session, the access network device may determine each PDU according to whether it receives an indication for providing relay services (for example, for the first PDU session, the indication is the first indication information) Whether the session is used to provide relay services, and then determine the first group of PDU sessions. The first AMBR is determined according to the AMBR of each PDU session in the first group of PDU sessions. Specifically, the access network device may determine the sum of the AMBRs of the PDU sessions in the first group of PDU sessions as the second AMBR.

In another implementation manner of Embodiment 1, the AMF may notify the access network device that the first PDU session is a PDU session that provides a relay service. In this case, in step 1002, after the AMF obtains the first indication information in the PDU session establishment request, in step 1005, it is directly carried in the N2 PDU session request and sent to the access network device. At this time, it can be understood that neither the SM context request nor the N1N2 transmission message contains the first indication information.

Example 2

In Embodiment 2, taking the SMF informing the access network device that the first PDU session is a PDU session providing a relay service as an example, the solution 1 is exemplified. The difference from Embodiment 1 is that, in Embodiment 1, SMF learns that the first PDU session is a PDU session that provides relay services during the establishment of the first PDU session. In Embodiment 2, SMF learns that the first PDU session is established after the PDU session is established. A PDU session is a PDU session that provides relay services.

As shown in Figure 11, the method provided in Embodiment 2 includes:

1101 is the same as step 1001.

1102. The relay terminal establishes a first PDU session.

Among them, the first PDU session is used to provide a relay service. The relay terminal can establish the first PDU session by interacting with network elements such as SMF, AMF, and PCF.

Step 1102 can be implemented through the above steps 1002 to 1005 in specific implementation.

1103. The relay terminal sends a remote terminal report to the AMF. Correspondingly, the AMF receives the remote terminal report from the relay terminal.

The remote terminal report may include information such as the identification of the first remote terminal (Remote User ID), the IP address of the first remote terminal, and the identification of the first PDU session. The remote terminal report may also include the identification of the relay terminal.

1104. The AMF sends a remote terminal report to the SMF. Correspondingly, the SMF receives the remote terminal report from the AMF.

1105. The SMF determines the first indication information according to the remote terminal report.

When step 1105 is specifically implemented, in one implementation manner, the SMF may determine the first indication information according to the identification of the first remote terminal and the identification of the first PDU session in the remote terminal report. In another implementation manner, the SMF may determine the first indication information according to the remote terminal report (which can be understood as the message type reported by the remote terminal) and the identifier of the first PDU session therein.

1106-1108, which are the same as the above steps 1004 to 1006 respectively.

Wherein, before step 1106, the process of SMF obtaining the AMBR of each session is similar to that of Embodiment 1. For details, please refer to Embodiment 1 for understanding, and will not be repeated here.

In another implementation manner of Embodiment 2, the AMF may notify the access network device that the first PDU session is a PDU session that provides a relay service. In this case, after step 1103, AMF can determine the first indication information according to the remote terminal report (the determination method is similar to SMF), and step 1105 is not performed. In step 1107, AMF directly carries the determined first indication information in the N2 PDU The session request is sent to the access network device. At this time, it can be understood that neither the SM context request nor the N1N2 transmission message contains the first indication information.

Example 3

In Embodiment 3, taking the relay terminal notifying the access network device that the first PDU session is a PDU session providing a relay service as an example, the solution 1 is exemplified.

As shown in Figure 12, the method provided in Embodiment 3 includes:

1201 is the same as step 1001.

1202 is the same as step 1102.

1203. The access network device sends an RRC reconfiguration (RRC Reconfiguration) message to the relay terminal. Correspondingly, the relay terminal receives the RRC reconfiguration message from the access network device.

Among them, the RRC reconfiguration message is used to perform RRC reconfiguration.

1204. The relay terminal sends an RRC reconfiguration complete message to the access network device, where the RRC reconfiguration complete message may carry the first indication information. Correspondingly, the access network device receives the RRC reconfiguration complete message from the relay terminal.

1205. Same as step 1006.

Wherein, before step 1106, the process for the access network device to obtain the AMBR of each session is similar to that of Embodiment 1. For details, please refer to Embodiment 1 for understanding, and will not be repeated.

Example 4

In Embodiment 4, the UDM stores the AMBR corresponding to the PDU session of each session attribute, and the PDU session of each session attribute corresponds to one AMBR as an example, and the above-mentioned scheme 1 + scheme 2 is exemplified.

As shown in Figure 13, the method provided in Embodiment 4 includes:

1301. The relay terminal sends a registration (registration) request to the AMF. Correspondingly, the AMF receives the registration request from the relay terminal.

Wherein, the registration request may include third indication information, and the third indication information is used to indicate that the relay terminal is capable of providing relay services (relay capability).

1302. The AMF sends a user subscription data acquisition message to the UDM. Correspondingly, the UDM receives the user subscription data acquisition message from the AMF.

Wherein, the user subscription data acquisition message carries third indication information.

1303. The UDM sends a user subscription data acquisition response message to the AMF. Correspondingly, the AMF receives the user subscription data acquisition response message from the UDM.

The user subscription data acquisition response message may include the second AMBR of the relay terminal and the fourth AMBR of the relay terminal. The second AMBR is the AMBR subscribed by the relay terminal. The fourth AMBR is the upper limit of the data transmission rate of the remote terminal served by the subscribed relay terminal.

An alternative implementation of step 1303 is: in the process of AM policy association between the AMF and the PCF, the PCF sends the second AMBR of the relay terminal and the fourth AMBR of the relay terminal to the AMF.

1304. The AMF sends an NGAP message to the access network device.

Wherein, the NGAP message may include the second AMBR of the relay terminal and the fourth AMBR of the relay terminal.

1305. The SMF determines that the first PDU session is used to provide a relay service.

Refer to Embodiment 1 or Embodiment 2 for the method for SMF to determine that the first PDU session is used to provide the relay service.

1306. The SMF sends an N1N2 transmission message to the AMF. The N1N2 transmission message carries the first indication information and the AMBR of the first PDU session. Correspondingly, the AMF receives the N1N2 transmission message from the SMF.

Wherein, the first indication information is used to indicate that the first PDU session is used to provide a relay service. The AMBR of the first PDU session is the AMBR corresponding to the first PDU session.

Among them, the process of SMF obtaining the AMBR of each session is similar to that of Embodiment 1. For details, please refer to Embodiment 1 for understanding, and will not be repeated.

1307. The AMF sends an N2 PDU session request to the access network device, where the N2 PDU session request carries the first indication information and the AMBR of the first PDU session. Correspondingly, the access network device receives the N2 PDU session request from the AMF.

The first indication information and the AMBR of the first PDU session may be carried in the N2 SM info container in the N2 PDU session request.

As each PDU session is established, the access network device will receive the AMBR corresponding to the PDU session. After the access network device receives the AMBR of all PDU sessions of the relay terminal, it determines which PDU sessions belong to the first group of PDU sessions. Which PDU sessions belong to the second group of PDU sessions, thereby determining the AMBR of the first group of PDU sessions and the AMBR of the second group of PDU sessions.

1308. The access network device uses the third AMBR to control the data transmission rate of the relay terminal, and also uses the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal.

Wherein, the third AMBR is the smaller value of the first AMBR and the second AMBR, and the sixth AMBR is the smaller value of the fourth AMBR and the fifth AMBR.

For related description of step 1308, refer to step 702 and step 803 above.

Example 5

In Embodiment 5, the UDM stores the AMBR corresponding to the PDU session of each session attribute, and the PDU session of each session attribute corresponds to two AMBRs as an example, and the above-mentioned scheme 1 + scheme 2 is exemplified.

As shown in Figure 14, the method provided in Embodiment 5 includes:

1401-1405, which are the same as steps 1301 to 1305, respectively.

1406. The SMF sends a user subscription data acquisition message to the UDM. Correspondingly, the UDM receives the user subscription data acquisition message from the SMF.

Wherein, the user subscription data acquisition message may carry fourth instruction information and fifth instruction information. The fourth indication information is used to indicate the session attributes of the first PDU session. The fifth indication information is used to indicate that the first PDU session is used to provide a relay service.

1407. The UDM sends a user subscription data acquisition response message to the SMF. Correspondingly, the SMF receives the user subscription data acquisition response message from the UDM.

The user subscription data acquisition response message may carry the AMBR of the first PDU session, and the AMBR of the first PDU session is the AMBR corresponding to the first PDU session when the relay service is provided.

1408. The SMF sends an N1N2 transmission message to the AMF. The N1N2 transmission message carries the first indication information and the AMBR of the first PDU session. Correspondingly, the AMF receives the N1N2 transmission message from the SMF.

1409. The AMF sends an N2 PDU session request to the access network device, where the N2 PDU session request carries the first indication information and the AMBR of the first PDU session. Correspondingly, the access network device receives the N2 PDU session request from the AMF.

1410. The access network device uses the third AMBR to control the data transmission rate of the relay terminal, and also uses the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal.

For related description of step 1410, refer to step 702 and step 803 above.

Example 6

In Example 6, the above-mentioned scheme 3 is exemplified.

As shown in Figure 15, the method provided in Embodiment 6 includes:

1501. The AMF receives a registration update request from a relay terminal.

Wherein, the relay terminal may send a registration update request to the AMF when the first remote terminal requests to establish a PDU session.

The registration update request may include the identification of the first remote terminal.

1502. The AMF obtains the information of the AMBR (that is, the seventh AMBR) subscribed by the first remote terminal according to the identifier of the first remote terminal.

When step 1502 is specifically implemented, the AMF sends a user subscription data acquisition message to the UDM, and the user subscription data acquisition message may include the identifier of the first remote terminal. After the UDM receives the user subscription data acquisition message from the AMF, it determines the seventh AMBR, and carries the seventh AMBR in the user subscription data acquisition response message and sends it to the AMF.

The AMBR subscribed by the first remote terminal may be located in the subscription information of the first remote terminal stored in the UDM.

1503. The AMF sends an NGAP message to the access network device.

Wherein, the NGAP message may include the identification of the seventh AMBR and the first remote terminal.

1504. The SMF determines that the first PDU session is used to provide a relay service.

Refer to Embodiment 1 or Embodiment 2 for the method for SMF to determine that the first PDU session is used to provide the relay service. The first PDU session is used for the relay terminal to provide a relay service for the first remote terminal.

1505. The SMF sends an N1N2 transmission message to the AMF. The N1N2 transmission message carries the first indication information, the AMBR of the first PDU session, and the identifier of the first remote terminal. Correspondingly, the AMF receives the N1N2 transmission message from the SMF.

Wherein, the first indication information is used to indicate that the first PDU session is used to provide a relay service.

1506. The AMF sends an N2 PDU session request to the access network device. The N2 PDU session request carries the first indication information, the AMBR of the first PDU session, and the identifier of the first remote terminal. Correspondingly, the access network device receives the N2 PDU session request from the AMF.

The first indication information, the AMBR of the first PDU session, and the identifier of the first remote terminal may be carried in the N2 SM info container in the N2 PDU session request.

Among them, when each PDU session is established, the SMF can notify the access network device that the corresponding PDU session is the PDU session used to serve the remote terminal, and the access network device determines the relay terminal based on this information, which is used for the bearer The PDU session of the data of the first remote terminal is further determined to determine the AMBR of the PDU session of the relay terminal used to carry the data of the first remote terminal.

1507. The access network device uses the ninth AMBR to control the data transmission rate of the first remote terminal served by the relay terminal.

For related descriptions of step 1507, refer to step 903 above.

Part 2: 4G system

FIG. 16 exemplarily shows a schematic diagram of a network architecture of a 4G system. In this schematic diagram, the 4G system may include: terminals, evolved universal terrestrial radio access network (E-UTRAN), service gateway (serving gateway, SGW), packet data gateway (packet data network gateway) , PGW), mobility management network element (mobility management entity, MME), home subscriber server (home subscriber server, HSS), mobile switching center (mobile switching center, MSC), and policy and charging rules (policy and charging rules) function, PCRF) network element. Among them, the terminal is connected to E-UTRAN, E-UTRAN is connected to MME and SGW, SGW is connected to MME, E-UTRAN and PGW, PGW is physically connected to SGW and PCRF, and MME is connected to E-UTRAN, SGW, HSS and MSC. The PGW and PCRF entities can be connected to the operator’s IP services.

Among them, E-UTRAN may be composed of multiple access network equipment, and the access network equipment in the 4G system may be called an evolved base station (evolutional node B, eNB or eNodeB). MME is similar to AMF in 5G system. HSS is similar to UDM/UDR in 5G system. PGW is similar to SMF in 5G system. PCRF is similar to PCF in 5G system.

In the 4G system, the access network equipment is responsible for controlling the data transmission rate of the terminal. The MME is responsible for determining the AMBR of the terminal and instructing it to the access network equipment. Specifically, the MME may set the AMBR of the terminal to: the sum of the AMBRs corresponding to all Non-GBR bearers, and the smaller value of the AMBR subscribed by the terminal. It can be seen that there are similar problems in the 4G system as in the 5G system. If the terminal is a relay terminal, there is no distinction between the first group of bearers (Non-GBR bearers used to carry the data of the relay terminal) and the first group of the relay terminal. Two sets of bearers (Non-GBR bearers used to carry data of remote terminals served by the relay terminal). Both sets of bearers are taken into account when determining the sum of AMBR corresponding to all Non-GBR bearers of the relay terminal. To accurately control the data transmission rate of the relay terminal, it is also impossible to accurately control the data transmission rate of the remote terminal served by the relay terminal.

Similar to the 5G system, the communication method provided in the second part, the access network equipment can only control the data transmission rate of the relay terminal (denoted as Plan 1), or it can only control the remote terminal serviced by the relay terminal. The data transmission rate is controlled (denoted as scheme two), and the data transmission rate of each remote terminal can also be controlled (denoted as scheme three). The difference from the 5G system is that in the second part, the AMBR of the relay terminal is determined by the MME. Any two of the schemes from scheme one to scheme three can be combined, and scheme one, scheme two and scheme three can also be combined by combining the corresponding schemes.

The following is a description of options one to three separately.

Referring to Figure 17, the implementation process of scheme one includes:

1701. The MME determines the first AMBR of the relay terminal.

Among them, the relevant description about the relay terminal, the remote terminal, the data packet of the relay terminal, etc. can be found in the above scheme 1. It is only necessary to replace the corresponding description in the 5G system with the corresponding description in the 4G system for understanding. Go into details.

Wherein, the first AMBR is the sum of AMBRs corresponding to the first group of bearers of the relay terminal. The first group of bearers is used to bear the data of the relay terminal.

The first group of bearers may include one or more bearers. If one bearer is included in the first group of bearers, the MME may determine the AMBR corresponding to the bearer as the first AMBR. If the first group of bearers includes multiple bearers, the MME may add the AMBRs corresponding to the multiple bearers to obtain the first AMBR.

When step 1701 is specifically implemented, the MME may determine other bearers except the second group of bearers as the first group of bearers. The second group carries the data of the remote terminal used to carry the relay terminal service. For the description of the "relay terminal service remote terminal data", please refer to the above solution 1. It is only necessary to replace the corresponding description in the 5G system with the corresponding description in the 4G system for understanding, and will not be repeated.

1702. The MME sends a third AMBR to the access network device. Correspondingly, the access network device receives the third AMBR from the MME.

Wherein, the third AMBR is the smaller value of the first AMBR and the second AMBR. The third AMBR may be determined by the MME. The second AMBR is the AMBR (Subscribed UE-AMBR) subscribed by the relay terminal, that is, the upper limit of the sum of the transmission rates of the data carried by the Non-GBR of the subscribed relay terminal.

Optionally, before step 1702, the method further includes: the HSS sends the second AMBR to the MME. Correspondingly, the MME receives the second AMBR from the HSS. Wherein, the MME may obtain the second AMBR in the relay terminal attachment procedure. The relay terminal attachment process in the 4G system is similar to the relay terminal registration process in the 5G system.

Wherein, the access network equipment is the access network equipment accessed by the relay terminal. Optionally, the MME further sends sixth indication information to the access network device, where the sixth indication information is used to indicate that the third AMBR is an AMBR that controls the data transmission rate of the relay terminal.

1703. The access network device uses the third AMBR to control the data transmission rate of the relay terminal.

When step 1703 is specifically implemented, the access network device uses the third AMBR to control the sum of the transmission rates of all the data carried by the Non-GBR of the relay terminal.

For the specific implementation of step 1703, refer to the above step 702, which will not be repeated here.

In the method provided by the first solution, the MME determines the smaller value of the first AMBR and the second AMBR as the AMBR used to control the data transmission rate of the relay terminal. Compared with the prior art, the first AMBR only considers the AMBR corresponding to the first group of bearers, and does not consider the AMBR corresponding to the second group of bearers, thereby more accurately controlling the data transmission rate of the relay terminal.

Among them, which bearers belong to the second group of bearers may be indicated to the MME by the relay terminal. Take the first bearer in the second group of bearers as an example. Similar to solution 1 above, the MME may also have three ways to determine that the first bearer is used to provide the relay service.

In the first manner, the relay terminal sends first indication information to the MME, where the first indication information is used to indicate that the first bearer is used to provide the relay service, and the MME determines that the first bearer is used to provide the relay service according to the first indication information.

In the second manner, the relay terminal sends the identity of the first remote terminal and the identity of the first bearer to the MME, and the MME determines that the first bearer is used to provide the relay service according to the identity of the first remote terminal and the identity of the first bearer.

In the third manner, the relay terminal sends a remote terminal report carrying the identifier of the first bearer to the MME, and the MME determines that the first bearer is used to provide the relay service according to the remote terminal report.

For the specific implementation of the first to third modes, please refer to the solution 1. It is only necessary to replace the corresponding description in the 5G system with the corresponding description in the 4G system for understanding, and will not be repeated.

Optionally, the MME also sends first indication information to the access network device, so that the access network device knows that the first bearer is used to carry the data of the remote terminal serving the relay terminal, so as to determine the data transmission rate of the relay terminal. control. It should be noted that if the PGW can obtain the first indication information, the PGW may also send the first indication information to the access network device.

It is understandable that if other bearers are included in the second group of bearers, the MME may also use a similar method to determine that the bearers are used to provide relay services. It is understandable that when determining the first AMBR, the MME needs to exclude all the bearers in the second group of bearers.

Referring to Figure 18, the implementation process of scheme two includes:

1801. The MME receives the fourth AMBR of the relay terminal from the HSS.

Among them, the relevant descriptions about the relay terminal, the remote terminal, the fourth AMBR, the data packet of the relay terminal, etc. can be found in the above scheme 2. It is only necessary to replace the corresponding description in the 5G system with the corresponding description in the 4G system for understanding. Yes, I won’t repeat it.

Wherein, the MME may obtain the subscription data of the relay terminal from the HSS in the attachment process of the relay terminal, and the subscription data of the relay terminal may include the fourth AMBR.

Wherein, the MME may send an indication to the HSS that the relay terminal is capable of providing relay services, and the HSS sends the fourth AMBR to the MME according to the indication. Whether a terminal is capable of providing relay services can be indicated to the MME when the terminal is registered.

1802. The MME sends the sixth AMBR to the access network device. Correspondingly, the access network device receives the sixth AMBR from the MME.

Among them, the sixth AMBR is the smaller value of the fourth AMBR and the fifth AMBR. The minimum value can be determined by the MME. For related descriptions of the fourth AMBR, the fifth AMBR, the sixth AMBR, etc., please refer to the above solution 2. It is only necessary to replace the corresponding description in the 5G system with the corresponding description in the 4G system for understanding, and will not be repeated.

Wherein, the access network equipment is the access network equipment accessed by the relay terminal. Optionally, the MME further sends seventh indication information to the access network device, where the seventh indication information is used to indicate that the sixth AMBR is an AMBR that controls the data transmission rate of the remote terminal served by the relay terminal.

1803. The access network equipment uses the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal.

When step 1803 is specifically implemented, refer to the above step 803, and only need to replace the corresponding description in the 5G system with the corresponding description in the 4G system for understanding, and will not be repeated.

In the method provided by the second solution, the MME determines the smaller value of the fourth AMBR and the fifth AMBR as the AMBR used to control the data transmission rate of the remote terminal served by the relay terminal. The fifth AMBR only considers the AMBR corresponding to the second group of bearers, and does not consider the AMBR corresponding to the first group of bearers, so as to more accurately control the data transmission rate of the remote terminal served by the relay terminal.

Optionally, the process for the MME to determine the fifth AMBR includes:

11) The HSS sends the AMBR corresponding to the first bearer to the MME. Correspondingly, the MME receives the AMBR corresponding to the first bearer from the HSS.

12) The MME determines the fifth AMBR based on the AMBR corresponding to the first bearer.

Wherein, the MME may obtain the AMBR corresponding to the first bearer from the HSS during the establishment of the first bearer.

In the embodiment of this application, the HSS stores the AMBR corresponding to the bearer of each attribute, and the AMBR corresponding to the bearer of each attribute has two cases:

Case 1. The bearer of each attribute corresponds to an AMBR.

Case 2. The bearer of each attribute corresponds to two AMBRs, one AMBR is the corresponding AMBR when the bearer of this attribute is used to carry the data of the relay terminal, and the other AMBR is the bearer of this attribute is used to carry the service of the relay terminal. The AMBR corresponding to the data of the remote terminal (that is, used to provide relay services).

In case 1, the AMBR corresponding to the first bearer is the AMBR corresponding to the first bearer. In this case, optionally, before step 11), the method further includes: the MME sends fourth indication information to the HSS, where the fourth indication information is used to indicate the attribute of the first bearer. Correspondingly, the HSS receives the fourth indication information from the MME, and sends the AMBR corresponding to the first bearer to the MME according to the fourth indication information.

In case 2, the AMBR corresponding to the first bearer is the AMBR corresponding to the first bearer when the first bearer provides the relay service. In this case, optionally, before step 11), the method further includes: the MME sends the foregoing fourth indication information and fifth indication information to the HSS, where the fifth indication information is used to indicate that the first bearer is used to provide the relay service . Correspondingly, the HSS receives the fourth indication information and the fifth indication information from the MME, and sends the AMBR corresponding to the first bearer to the MME according to the fourth indication information and the fifth indication information.

It is understandable that if other bearers are included in the second group of bearers, the MME may also use a similar method to obtain the AMBR corresponding to the bearer. For example, if the second group of bearers further includes a second bearer, the MME may also use a method similar to the first bearer to determine the AMBR corresponding to the second bearer. In this case, step 13) may include: the MME determines the fifth AMBR based on the AMBR corresponding to the first bearer and the AMBR corresponding to the second bearer.

It is understandable that in addition to the first bearer and the second bearer, the second group of bearers may also include other bearers. When determining the fifth AMBR, the MME needs to calculate all the bearers in the second group of bearers.

In the above scheme 1 and scheme 2, multiple bearers can carry data of one remote terminal served by the relay terminal, and one bearer can also carry data of multiple remote terminals served by the relay terminal. In the third scenario, multiple bearers can be used to bear the data of one remote terminal served by the relay terminal, but one bearer can only bear the data of one remote terminal served by the relay terminal. Referring to Figure 19, the implementation process of Scheme 3 includes:

1901. The MME receives the seventh AMBR of the first remote terminal served by the relay terminal from the HSS.

Among them, the relevant description about the relay terminal, the remote terminal, the seventh AMBR, the data of the remote terminal, etc. can be found in the above solution 3. It is only necessary to replace the corresponding description in the 5G system with the corresponding description in the 4G system for understanding. No longer.

The MME may obtain the seventh AMBR from the HSS after receiving the attachment request or the remote terminal report sent by the relay terminal.

1902. The MME sends the ninth AMBR to the access network device. Correspondingly, the access network device receives the ninth AMBR from the MME.

Among them, the ninth AMBR is the smaller value of the seventh AMBR and the eighth AMBR. The smaller value can be determined by the MME. For related descriptions of the eighth AMBR, the ninth AMBR, etc., please refer to the above solution 3. It is only necessary to replace the corresponding description in the 5G system with the corresponding description in the 4G system for understanding, and will not be repeated.

Wherein, the access network equipment is the access network equipment accessed by the relay terminal. Optionally, the MME further sends eighth indication information to the access network device, where the eighth indication information is used to indicate that the ninth AMBR is an AMBR that controls the data transmission rate of the first remote terminal served by the relay terminal. The eighth indication information may include the identification of the first remote terminal.

1903. The access network device uses the ninth AMBR to control the data transmission rate of the first remote terminal served by the relay terminal.

For the specific implementation of step 1903, refer to the above step 903, and it is only necessary to replace the corresponding description in the 5G system with the corresponding description in the 4G system for understanding, and will not be repeated.

In the method provided by the third solution, the MME determines the smaller value of the seventh AMBR and the eighth AMBR as the AMBR used to control the data transmission rate of the first remote terminal served by the relay terminal. The eighth AMBR only considers the bearer used to carry the data of the first remote terminal, so as to more accurately control the data transmission rate of the first remote terminal served by the relay terminal.

The above is an overview of solutions one to three. The following example illustrates the above solution one through Example 7. For exemplary descriptions of other solutions, please refer to the corresponding solutions in the 5G system for understanding. The description can be understood by replacing the description with the corresponding description in the 4G system, and will not be repeated.

Example 7

See Figure 20, including:

In 2001, the MME obtains the second AMBR of the relay terminal from the HSS.

Wherein, the MME may obtain the second AMBR of the relay terminal in the terminal attachment procedure.

In 2002, the relay terminal sends a bearer resource modification request (request bearer resource modification) to the MME, and the bearer resource modification request carries the first indication information. Correspondingly, the MME receives the bearer resource modification request from the relay terminal, and the MME determines that the first bearer provides the relay service according to the first indication information in the bearer resource modification request.

In an alternative implementation of step 2002, the relay terminal sends a remote terminal report to the MME, and the remote terminal report carries the identifier of the first bearer. Correspondingly, the MME receives the remote terminal report from the relay terminal, and determines that the first bearer provides the relay service according to the remote terminal report.

In 2003, the MME determined the first AMBR.

The MME may determine that the first bearer belongs to the second group of bearers according to the first indication information. Using a similar method, the bearers in the second group of bearers can be determined, and then the first group of bearers can be determined. The MME may obtain the AMBR corresponding to each bearer from the HSS during the bearer establishment process in the first group of bearers, and then determine the first AMBR.

In 2004, the MME sends an N2 request (N2request) to the access network device, and the N2 request can carry the third AMBR. Correspondingly, the access network equipment receives the N2 request from the MME.

Wherein, the third AMBR is the smaller value of the first AMBR and the second AMBR. The third AMBR may be determined by the MME.

Wherein, the N2 request may also carry first indication information.

In 2005, the access network equipment controls the data transmission rate of the relay terminal according to the third AMBR.

It should be noted that in the embodiments of this application, there are few descriptions of the solutions in the 4G system, but it is understandable that the essential difference between the solutions in the 4G system and the solutions in the 5G system is that the access network equipment in the 5G system is determined The AMBR used to control the transmission rate of data. In the 4G system, the MME determines the AMBR used to control the transmission rate of data. In addition to this difference, the solutions shown in the 5G system can all be applied to the 4G system, and only need to be replaced with the corresponding network elements and corresponding processes in the 4G system for understanding.

It should be noted that when determining the AMBR used to control the data transmission rate in the embodiments of the present application, the smaller of the two values is taken as an example for exemplification. In actual implementation, other values may also be used. The method for determining the value, for example, taking the average or weighted average of the two values, etc., is not limited in this application.

The system architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art knows that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

It should be pointed out that the terms or terms involved in the various embodiments of the present application can refer to each other, and are not limited. The role of the existing messages exchanged between various network elements in this application can be referred to in the prior art, and this application will not elaborate on it.

The foregoing mainly introduces the solutions of the embodiments of the present application from the perspective of methods. It can be understood that each network element, for example, access network equipment, relay terminal, SMF, AMF, UDM, MME, HSS, etc., in order to achieve the above functions, it includes the corresponding hardware structure and software modules that perform each function. at least one. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The embodiments of the present application can divide the access network equipment, relay terminal, SMF, AMF, UDM, MME, HSS, etc. into functional units according to the foregoing method examples. For example, each functional unit can be divided corresponding to each function, or two One or more functions are integrated in one processing unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

Exemplarily, FIG. 21 shows a schematic diagram of a possible structure of the communication device (denoted as the communication device 210) involved in the foregoing embodiment. The communication device 210 includes a processing unit 2101 and a communication unit 2102. Optionally, a storage unit 2103 is further included. The communication device 210 may be used to illustrate the structure of the access network equipment, relay terminal, SMF, AMF, UDM, MME, HSS, etc. in the foregoing embodiment.

When the schematic structural diagram shown in FIG. 21 is used to illustrate the structure of the access network device involved in the above embodiment, the processing unit 2101 is used to control and manage the actions of the access network device, for example, the processing unit 2101 is used to execute 701 and 702 in Figure 7, 802 and 803 in Figure 8, 902 and 903 in Figure 9, 1005 and 1006 in Figure 10, 1107 and 1108 in Figure 11, 1203-1205 in Figure 12, and Figure 13 1304, 1307, and 1308 in Figure 14, 1404, 1409, and 1410 in Figure 14, 1503, 1506, and 1507 in Figure 15, 1702 and 1703 in Figure 17, 1802 and 1803 in Figure 18, 1902 and 1902 in Figure 19 1903, 2004 and 2005 in FIG. 20, and/or actions performed by the access network device in other processes described in the embodiments of the present application. The processing unit 2101 may communicate with other network entities through the communication unit 2102, for example, communicate with the AMF in FIG. 14. The storage unit 2103 is used to store the program code and data of the access network device.

When the schematic structural diagram shown in FIG. 21 is used to illustrate the structure of the relay terminal involved in the foregoing embodiment, the processing unit 2101 is used to control and manage the actions of the relay terminal. For example, the processing unit 2101 is used to execute FIG. 10 1002 in Figure 11, 1102 and 1103 in Figure 11, 1202-1204 in Figure 12, 1301 in Figure 13, 1401 in Figure 14, 1501 in Figure 15, 2002 in Figure 20, and/or implementation of this application The actions performed by the relay terminal in other processes described in the example. The processing unit 2101 may communicate with other network entities through the communication unit 2102, for example, communicate with the AMF in FIG. 14. The storage unit 2103 is used to store the program code and data of the relay terminal.

When the schematic structural diagram shown in FIG. 21 is used to illustrate the structure of the SMF involved in the foregoing embodiment, the processing unit 2101 is used to control and manage the actions of the SMF. For example, the processing unit 2101 is used to execute 1003 and 1003 in FIG. 1004, 1104-1106 in Figure 11, 1305 and 1306 in Figure 13, 1405-1408 in Figure 14, 1504 and 1505 in Figure 15, and/or SMF in other processes described in the embodiments of this application Action performed. The processing unit 2101 may communicate with other network entities through the communication unit 2102, for example, communicate with the AMF in FIG. 15. The storage unit 2103 is used to store the program code and data of the SMF.

When the schematic structural diagram shown in FIG. 21 is used to illustrate the structure of the AMF involved in the above embodiment, the processing unit 2101 is used to control and manage the actions of the AMF. For example, the processing unit 2101 is used to execute 801 and 802, 901 and 902 in Figure 9, 1001-1005 in Figure 10, 1101 in Figure 11, 1201 in Figure 12, 1103, 1104, 1106 and 1107 in Figure 11, 1301-1304 in Figure 13, 1306 and 1307, 1401-1404, 1408, and 1409 in FIG. 14, 1501-1503, 1505, and 1506 in FIG. 15, and/or actions performed by AMF in other processes described in the embodiments of the present application. The processing unit 2101 may communicate with other network entities through the communication unit 2102, for example, communicate with the relay terminal in FIG. 15. The storage unit 2103 is used to store AMF program codes and data.

When the schematic structural diagram shown in FIG. 21 is used to illustrate the structure of the UDM involved in the foregoing embodiment, the processing unit 2101 is used to control and manage the actions of the UDM. For example, the processing unit 2101 is used to execute 801 in FIG. 901 in FIG. 9, 1302 and 1303 in FIG. 13, 1402, 1403, 1406, and 1407 in FIG. 14, and/or actions performed by the UDM in other processes described in the embodiments of the present application. The processing unit 2101 may communicate with other network entities through the communication unit 2102, for example, communicate with the AMF in FIG. 14. The storage unit 2103 is used to store UDM program codes and data.

When the schematic structural diagram shown in FIG. 21 is used to illustrate the structure of the MME involved in the foregoing embodiment, the processing unit 2101 is used to control and manage the actions of the MME. For example, the processing unit 2101 is used to execute 1701 and 1701 in FIG. 1702, 1801 and 1802 in FIG. 18, 1901 and 1902 in FIG. 19, 2001-2004 in FIG. 20, and/or actions performed by the MME in other processes described in the embodiments of the present application. The processing unit 2101 may communicate with other network entities through the communication unit 2102, for example, communicate with the access network device in FIG. 20. The storage unit 2103 is used to store the program code and data of the MME.

When the structural diagram shown in FIG. 21 is used to illustrate the structure of the HSS involved in the above embodiment, the processing unit 2101 is used to control and manage the actions of the HSS. For example, the processing unit 2101 is used to execute 1801 in FIG. 18, Actions performed by the HSS in 1901 in FIG. 19, 2001 in FIG. 20, and/or other processes described in the embodiments of the present application. The processing unit 2101 may communicate with other network entities through the communication unit 2102, for example, communicate with the MME in FIG. 20. The storage unit 2103 is used to store the program code and data of the HSS.

Exemplarily, the communication device 210 may be a device, a chip or a chip system.

When the communication device 210 is a device, the processing unit 2101 may be a processor; the communication unit 2102 may be a communication interface, a transceiver, an input interface and/or an output interface. Optionally, the transceiver may be a transceiver circuit. Optionally, the input interface may be an input circuit, and the output interface may be an output circuit.

When the communication device 210 is a chip or a chip system, the processing unit 2101 may be a processor, a processing circuit, a logic circuit, or the like. The communication unit 2102 may be a communication interface, an input interface and/or an output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or a chip system.

If the integrated unit in FIG. 21 is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of software products, and the computer software products are stored in a storage The medium includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. Storage media for storing computer software products include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks, etc., which can store program codes Medium.

When the processing unit 2101 is a processor, the communication unit 2102 is a communication interface, and the storage unit 2103 is a memory, the communication device involved in the embodiment of the present application may be the communication device 220 shown in FIG. 22.

FIG. 22 shows a schematic diagram of the hardware structure of a communication device provided by an embodiment of the application. The communication device may be an access network device, a relay terminal, SMF, AMF, UDM, MME, HSS, etc. herein. The communication device 220 includes at least one processor 2201, a communication bus 2202, and at least one communication interface 2204. Optionally, a memory 2203 is also included. In FIG. 22, the communication device 220 includes a processor 2201 and a communication interface 2204 as an example for drawing.

The processor 2201, the communication interface 2204, and the memory 2203 can communicate with each other through the communication bus 2202 to transfer control and/or data signals. The memory 2203 is used to store computer programs, and the processor 2201 is used to download from the memory 2203. Call and run the computer program to control the communication interface 2204 to send and receive signals.

In the first possible implementation, the processor 2201 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more An integrated circuit used to control the execution of the program of this application. The communication interface 2204 may be any device such as a transceiver.

In the second possible implementation manner, the processor 2201 may be a logic circuit, and the communication interface 2204 may include an input interface and/or an output interface.

The communication interface 2204 uses any device such as a transceiver to communicate with other devices or communication networks.

The memory 2203 may be ROM or other types of static storage devices that can store static information and instructions, RAM or other types of dynamic storage devices that can store information and instructions, or may be electrically erasable programmable read-only memory (electrically erasable programmable read-only memory). read-only memory, EEPROM), compact disc (read-only memory, CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disks A storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory may exist independently, and is connected to the processor through the communication bus 2202. The memory can also be integrated with the processor.

The memory 2203 is used to store computer-executable instructions for executing the solution of the present application, and the processor 2201 controls the execution. The processor 2201 is configured to execute computer-executable instructions stored in the memory 2203, so as to implement the methods provided in the following embodiments of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

When the schematic structural diagram shown in FIG. 22 is used to illustrate the structure of the access network device involved in the foregoing embodiment, the processor 2201 is used to control and manage the actions of the access network device, for example, the processor 2201 is used to execute 701 and 702 in Figure 7, 802 and 803 in Figure 8, 902 and 903 in Figure 9, 1005 and 1006 in Figure 10, 1107 and 1108 in Figure 11, 1203-1205 in Figure 12, and Figure 13 1304, 1307, and 1308 in Figure 14, 1404, 1409, and 1410 in Figure 14, 1503, 1506, and 1507 in Figure 15, 1702 and 1703 in Figure 17, 1802 and 1803 in Figure 18, 1902 and 1902 in Figure 19 1903, 2004 and 2005 in FIG. 20, and/or actions performed by the access network device in other processes described in the embodiments of the present application. The processor 2201 may communicate with other network entities through the communication interface 2204, for example, communicate with the AMF in FIG. 14. The memory 2203 is used to store program codes and data of the access network device.

When the schematic structural diagram shown in FIG. 22 is used to illustrate the structure of the relay terminal involved in the foregoing embodiment, the processor 2201 is used to control and manage the actions of the relay terminal. For example, the processor 2201 is used to execute FIG. 10 1002 in Figure 11, 1102 and 1103 in Figure 11, 1202-1204 in Figure 12, 1301 in Figure 13, 1401 in Figure 14, 1501 in Figure 15, 2002 in Figure 20, and/or implementation of this application The actions performed by the relay terminal in other processes described in the example. The processor 2201 may communicate with other network entities through the communication interface 2204, for example, communicate with the AMF in FIG. 14. The memory 2203 is used to store the program code and data of the relay terminal.

When the schematic structural diagram shown in FIG. 22 is used to illustrate the structure of the SMF involved in the foregoing embodiment, the processor 2201 is used to control and manage the actions of the SMF. For example, the processor 2201 is used to execute 1003 and 1003 in FIG. 1004, 1104-1106 in Figure 11, 1305 and 1306 in Figure 13, 1405-1408 in Figure 14, 1504 and 1505 in Figure 15, and/or SMF in other processes described in the embodiments of this application Action performed. The processor 2201 may communicate with other network entities through the communication interface 2204, for example, communicate with the AMF in FIG. 15. The memory 2203 is used to store SMF program codes and data.

When the schematic structural diagram shown in FIG. 22 is used to illustrate the structure of the AMF involved in the foregoing embodiment, the processor 2201 is used to control and manage the actions of the AMF. For example, the processor 2201 is used to execute 801 and 802, 901 and 902 in Figure 9, 1001-1005 in Figure 10, 1101 in Figure 11, 1201 in Figure 12, 1103, 1104, 1106 and 1107 in Figure 11, 1301-1304 in Figure 13, 1306 and 1307, 1401-1404, 1408, and 1409 in FIG. 14, 1501-1503, 1505, and 1506 in FIG. 15, and/or actions performed by AMF in other processes described in the embodiments of the present application. The processor 2201 may communicate with other network entities through the communication interface 2204, for example, communicate with the relay terminal in FIG. 15. The memory 2203 is used to store AMF program codes and data.

When the schematic structural diagram shown in FIG. 22 is used to illustrate the structure of the UDM involved in the foregoing embodiment, the processor 2201 is used to control and manage the actions of the UDM. For example, the processor 2201 is used to execute 801 in FIG. 901 in FIG. 9, 1302 and 1303 in FIG. 13, 1402, 1403, 1406, and 1407 in FIG. 14, and/or actions performed by the UDM in other processes described in the embodiments of the present application. The processor 2201 may communicate with other network entities through the communication interface 2204, for example, communicate with the AMF in FIG. 14. The memory 2203 is used to store UDM program codes and data.

When the schematic structural diagram shown in FIG. 22 is used to illustrate the structure of the MME involved in the foregoing embodiment, the processor 2201 is used to control and manage the actions of the MME. For example, the processor 2201 is used to execute 1701 and 1701 in FIG. 1702, 1801 and 1802 in FIG. 18, 1901 and 1902 in FIG. 19, 2001-2004 in FIG. 20, and/or actions performed by the MME in other processes described in the embodiments of the present application. The processor 2201 may communicate with other network entities through the communication interface 2204, for example, communicate with the access network device in FIG. 20. The memory 2203 is used to store the program code and data of the MME.

When the schematic structural diagram shown in FIG. 22 is used to illustrate the structure of the HSS involved in the foregoing embodiment, the processor 2201 is used to control and manage the actions of the HSS. For example, the processor 2201 is used to execute 1801 in FIG. 18, Actions performed by the HSS in 1901 in FIG. 19, 2001 in FIG. 20, and/or other processes described in the embodiments of the present application. The processor 2201 may communicate with other network entities through the communication interface 2204, for example, communicate with the MME in FIG. 20. The memory 2203 is used to store the program code and data of the HSS.

The embodiment of the present application also provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute any of the above-mentioned methods.

The embodiments of the present application also provide a computer program product containing instructions, which when run on a computer, cause the computer to execute any of the above-mentioned methods.

An embodiment of the present application also provides a communication system, which includes the access network equipment, relay terminal, SMF, AMF, and UDM in the above embodiment; or, the communication system includes the access in the above embodiment. Network access equipment, relay terminal, MME and HSS.

In the description of this application, unless otherwise specified, "/" means or, for example, A/B can mean A or B; "and/or" in this document is only an association relationship describing associated objects, It means that there can be three kinds of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone.

In the description of this application, unless otherwise specified, "plurality" means two or more than two.

In addition, in order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with substantially the same function and effect. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and order of execution, and words such as "first" and "second" do not limit the difference.

In addition, in the description of this application, unless otherwise specified, "at least one" refers to any one or a combination of any multiple, and "at least one" refers to any one or a combination of any multiple. For example, at least one of A, B and C may include the following situations: ①A; ②B; ③C; ④A and B; ⑤A and C; ⑥B and C; ⑦A, B and C.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer execution instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or includes one or more data storage devices such as servers, data centers, etc. that can be integrated with the medium. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

Although this application has been described in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art can understand and understand by viewing the drawings, the disclosure, and the appended claims in the process of implementing the claimed application. Implement other changes of the disclosed embodiment. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit may implement several functions listed in the claims. Certain measures are described in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

Although the application has been described in combination with specific features and embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary descriptions of the application as defined by the appended claims, and are deemed to cover any and all modifications, changes, combinations or equivalents within the scope of the application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that it comprises:

The access network device determines the first aggregate maximum bit rate AMBR of the relay terminal, the access network device is the access network device accessed by the relay terminal, and the relay terminal is used to provide a relay for the remote terminal Service, the first AMBR is the sum of AMBR of a first group of protocol data unit PDU sessions of the relay terminal, and the first group of PDU sessions is used to carry data of the relay terminal;

The access network device uses a third AMBR to control the data transmission rate of the relay terminal; wherein, the third AMBR is the smaller value of the first AMBR and the second AMBR, and the first AMBR The second AMBR is the upper limit of the data transmission rate of the subscribed relay terminal.
The method according to claim 1, wherein the method further comprises:

The access network device receives first indication information from the first device, where the first indication information is used to indicate that a first PDU session is used to provide a relay service, and the first PDU session is used for the relay terminal to be A first remote terminal provides the relay service, the first group of PDU sessions does not include the first PDU session, and the first remote terminal is one of the remote terminals served by the relay terminal;

The determining, by the access network device, the first AMBR of the relay terminal includes: the access network device determining the first AMBR of the relay terminal based on the first indication information.
The method according to claim 2, wherein the method further comprises:

The access network device receives second indication information from the first device, where the second indication information is used to indicate that a second PDU session is used to provide a relay service, and the second PDU session is used for the relay The terminal provides the relay service for a second remote terminal, the first group of PDU sessions does not include the second PDU session, and the second remote terminal is one of the remote terminals served by the relay terminal;

The access network device determining the first AMBR of the relay terminal based on the first indication information includes: the access network device determining the first AMBR of the relay terminal based on the first indication information and the second indication information The first AMBR.
The method according to claim 2 or 3, wherein the first device is a session management function SMF or an access and mobility management function AMF or the relay terminal.
The method according to any one of claims 2-4, wherein the method further comprises:

Receiving, by the access network device, the fourth AMBR of the relay terminal from the AMF, where the fourth AMBR is the upper limit of the data transmission rate of the remote terminal served by the relay terminal under contract;

The access network device uses the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal; wherein, the sixth AMBR is the higher of the fourth AMBR and the fifth AMBR. A small value, the fifth AMBR is the sum of the AMBR of the second group of PDU sessions of the relay terminal, and the second group of PDU sessions is used to carry the data of the remote terminal served by the relay terminal.
The method according to claim 5, wherein the method further comprises:

Receiving, by the access network device, the AMBR of the first PDU session from the SMF;

The access network device determines the fifth AMBR based on the AMBR of the first PDU session.
A communication method, characterized in that it comprises:

The first device obtains first indication information, where the first indication information is used to indicate that the PDU session of the first protocol data unit is used to provide relay services, and the first PDU session is used to provide the relay terminal for the first remote terminal. Following service

The first device sends the first indication information to an access network device, and the access network device is an access network device accessed by the relay terminal.
The method according to claim 7, wherein the first device is a session management function SMF or an access and mobility management function AMF or the relay terminal.
The method according to claim 8, wherein when the first device is the SMF or the AMF, acquiring the first indication information by the first device comprises:

The first device receives the first indication information from the relay terminal; or,

The first device receives the identifier of the first remote terminal and the identifier of the first PDU session from the relay terminal, and determines according to the identifier of the first remote terminal and the identifier of the first PDU session The first indication information; or,

The first device receives a remote terminal report from the relay terminal, and determines the first indication information according to the remote terminal report, and the remote terminal report carries the identifier of the first PDU session.
The method according to claim 9, wherein the first device receives the identifier of the first remote terminal and the identifier of the first PDU session from the relay terminal, and receives the identifier of the first remote terminal according to the first remote terminal. The identification of the terminal and the identification of the first PDU session to determine the first indication information includes:

Receiving, by the first device, a message from the relay terminal, the message carrying the identifier of the first remote terminal, the identifier of the relay terminal, and the identifier of the first PDU session;

The first device determines the first indication information according to the identifier of the first remote terminal, the identifier of the relay terminal, and the identifier of the first PDU session.
The method according to claim 8, wherein when the first device is the relay terminal, the sending of the first indication information by the first device to an access network device comprises:

The first device sends the first indication information to the access network device through a radio resource control RRC message.
A communication method, characterized in that it comprises:

The relay terminal establishes a first protocol data unit PDU session, where the first PDU session is used by the relay terminal to provide a relay service for the first remote terminal;

The relay terminal informs the first device that the relay terminal provides the relay service for the first remote terminal through the first PDU session, and the first device is a session management function SMF or access and mobility Management function AMF.
The method according to claim 12, wherein the relay terminal notifying the first device that the relay terminal provides the relay service for the first remote terminal through the first PDU session comprises:

The relay terminal sends a message to the first device, and the message carries the identity of the first remote terminal, the identity of the relay terminal, and the identity of the first PDU session.
The method according to claim 12, wherein the relay terminal notifying the first device that the relay terminal provides the relay service for the first remote terminal through the first PDU session comprises:

The relay terminal sends first indication information to the first device, where the first indication information is used to indicate that the first PDU session is used to provide the relay service for the first remote terminal.
A communication method, characterized in that it comprises:

The relay terminal establishes a first protocol data unit PDU session, where the first PDU session is used by the relay terminal to provide a relay service for the first remote terminal;

The relay terminal sends a remote terminal report to a first device, the remote terminal report carries an identifier of the first PDU session, and the first device is a session management function SMF or an access and mobility management function AMF.
A communication method, characterized in that it comprises:

The access and mobility management function AMF receives the fourth aggregate maximum bit rate AMBR of the relay terminal from the policy control function PCF. The relay terminal is used to provide a relay service for the remote terminal, and the fourth AMBR is the subscribed The upper limit of the data transmission rate of the remote terminal served by the relay terminal;

The AMF sends the fourth AMBR of the relay terminal to an access network device, and the access network device is an access network device accessed by the relay terminal.
The method according to claim 16, wherein the method further comprises:

The AMF sends third indication information to the PCF, where the third indication information is used to indicate that the relay terminal is capable of providing relay services.
A communication method, characterized in that it comprises:

The session management function SMF receives the aggregated maximum bit rate AMBR of the first protocol data unit PDU session from the unified data management UDM, where the first PDU session is used for the relay terminal to provide a relay service for the first remote terminal;

The SMF sends the AMBR of the first PDU session to the access network device.
The method according to claim 18, wherein the AMBR of the first PDU session is the AMBR corresponding to the first PDU session when the relay service is provided, and the method further comprises:

The SMF sends fourth indication information and fifth indication information to the UDM, where the fourth indication information is used to indicate the session attribute of the first PDU session, and the fifth indication information is used to indicate the first The PDU session is used to provide relay services.
A communication method, characterized in that it comprises:

The unified data management UDM receives fourth indication information and fifth indication information from the session management function SMF, where the fourth indication information is used to indicate the session attributes of the first protocol data unit PDU session, and the fifth indication information is used to indicate all The first PDU session is used to provide a relay service, and the first PDU session is used to provide a relay service for the first remote terminal by the relay terminal;

The UDM sends the maximum aggregate bit rate AMBR of the first PDU session to the SMF according to the fourth indication information and the fifth indication information, where the AMBR of the first PDU session is the first PDU The AMBR corresponding to the session when providing relay services.
A communication device, characterized by comprising: a processing unit;

The processing unit is configured to determine the first aggregate maximum bit rate AMBR of the relay terminal, the communication device is a communication device accessed by the relay terminal, and the relay terminal is used to provide a relay service for the remote terminal The first AMBR is the sum of AMBRs of a first group of protocol data unit PDU sessions of the relay terminal, and the first group of PDU sessions is used to carry data of the relay terminal;

The processing unit is further configured to use the third AMBR to control the data transmission rate of the relay terminal; wherein, the third AMBR is the smaller value of the first AMBR and the second AMBR The second AMBR is the upper limit of the data transmission rate of the subscribed relay terminal.
The device according to claim 21, wherein the device further comprises: a communication unit;

The communication unit is configured to receive first indication information from a first device, where the first indication information is used to indicate that a first PDU session is used to provide a relay service, and the first PDU session is used for the relay terminal Providing the relay service for a first remote terminal, the first group of PDU sessions does not include the first PDU session, and the first remote terminal is one of the remote terminals served by the relay terminal;

The processing unit is specifically configured to determine the first AMBR of the relay terminal based on the first indication information.
The device of claim 22, wherein:

The communication unit is further configured to receive second indication information from the first device, where the second indication information is used to indicate that a second PDU session is used for providing relay services, and the second PDU session is used for the The relay terminal provides the relay service for the second remote terminal, the first group of PDU sessions does not include the second PDU session, and the second remote terminal is one of the remote terminals served by the relay terminal one;

The processing unit is specifically configured to determine the first AMBR based on the first indication information and the second indication information.
The apparatus according to claim 22 or 23, wherein the first device is a session management function SMF or an access and mobility management function AMF or the relay terminal.
The device according to any one of claims 22-24, wherein:

The communication unit is further configured to receive a fourth AMBR of the relay terminal from the AMF, where the fourth AMBR is the upper limit of the data transmission rate of the remote terminal served by the relay terminal under contract;

The processing unit is further configured to use the sixth AMBR to control the data transmission rate of the remote terminal served by the relay terminal; wherein, the sixth AMBR is the fourth AMBR and the fifth AMBR. The smaller value in AMBR, the fifth AMBR is the sum of AMBR of the second group of PDU sessions of the relay terminal, and the second group of PDU sessions is used to carry the remote terminal served by the relay terminal The data.
The device of claim 25, wherein:

The communication unit is further configured to receive the AMBR of the first PDU session from the SMF;

The processing unit is further configured to determine the fifth AMBR based on the AMBR of the first PDU session.
A communication device, characterized by comprising: a processing unit and a communication unit;

The processing unit is configured to obtain first indication information, where the first indication information is used to indicate that the first protocol data unit PDU session is used to provide relay services, and the first PDU session is used to relay the terminal as the first Remote terminal provides relay service;

The communication unit is configured to send the first indication information to an access network device, where the access network device is an access network device accessed by a relay terminal.
The device according to claim 27, wherein the communication device is a session management function SMF or an access and mobility management function AMF or the relay terminal.
The device according to claim 28, wherein, when the communication device is the SMF or the AMF, the processing unit is specifically configured to:

Receiving the first indication information from the relay terminal through the communication unit; or,

Receive the identifier of the first remote terminal and the identifier of the first PDU session from the relay terminal through the communication unit, and determine according to the identifier of the first remote terminal and the identifier of the first PDU session The first indication information; or,

A remote terminal report is received from the relay terminal through the communication unit, and the first indication information is determined according to the remote terminal report, and the remote terminal report carries the identifier of the first PDU session.
The device according to claim 29, wherein the processing unit is specifically configured to:

Receiving a message from the relay terminal through the communication unit, the message carrying the identifier of the first remote terminal, the identifier of the relay terminal, and the identifier of the first PDU session;

The first indication information is determined according to the identifier of the first remote terminal, the identifier of the relay terminal, and the identifier of the first PDU session.
The device according to claim 28, wherein, in a case where the communication device is the relay terminal, the communication unit is specifically configured to:

Sending the first indication information to the access network device through a radio resource control RRC message.
A communication device, characterized by comprising: a processing unit and a communication unit;

The processing unit is configured to establish a first protocol data unit PDU session, where the first PDU session is used by the communication device to provide a relay service for a first remote terminal;

The communication unit is configured to notify a first device that the communication device provides the relay service for the first remote terminal through the first PDU session, and the first device is a session management function SMF or access and Mobile management function AMF.
The device according to claim 32, wherein the communication unit is specifically configured to:

Send a message to the first device, where the message carries the identifier of the first remote terminal, the identifier of the communication device, and the identifier of the first PDU session.
The device according to claim 32, wherein the communication unit is specifically configured to:

Sending first indication information to the first device, where the first indication information is used to indicate that the first PDU session is used to provide the relay service for the first remote terminal.
A communication device, characterized by comprising: a processing unit and a communication unit;

The processing unit is configured to establish a first protocol data unit PDU session, and the communication device provides a relay service for the first remote terminal through the first PDU session;

The communication unit is configured to send a remote terminal report to a first device, the remote terminal report carrying an identifier of the first PDU session, and the first device is a session management function SMF or an access and mobility management function AMF.
A communication device, characterized by comprising: a processing unit and a communication unit;

The processing unit is configured to receive the fourth aggregate maximum bit rate AMBR of the relay terminal from the policy control function PCF through the communication unit, and the relay terminal is configured to provide a relay service for the remote terminal, and the fourth AMBR The upper limit of the data transmission rate of the remote terminal serving the subscribed relay terminal;

The processing unit is further configured to send the fourth AMBR of the relay terminal to the access network device through the communication unit, and the access network device is the access network device accessed by the relay terminal.
The device of claim 36, wherein:

The processing unit is further configured to send third indication information to the PCF through the communication unit, where the third indication information is used to indicate that the relay terminal is capable of providing relay services.
A communication device, characterized by comprising: a processing unit and a communication unit;

The processing unit is configured to receive the aggregated maximum bit rate AMBR of the first protocol data unit PDU session from the unified data management UDM through the communication unit, and the first PDU session is used by the relay terminal to provide the first remote terminal Following service

The processing unit is further configured to send the AMBR of the first PDU session to the access network device through the communication unit.
The apparatus according to claim 38, wherein the AMBR of the first PDU session is the AMBR corresponding to the first PDU session when the relay service is provided, and the processing unit is further configured to:

The communication unit sends fourth indication information and fifth indication information to the UDM, where the fourth indication information is used to indicate the session attributes of the first PDU session, and the fifth indication information is used to indicate the The first PDU session is used to provide relay services.
A communication device, characterized by comprising: a processing unit and a communication unit;

The processing unit is configured to receive fourth indication information and fifth indication information from the session management function SMF through the communication unit, the fourth indication information is used to indicate the session attributes of the first protocol data unit PDU session, the The fifth indication information is used to indicate that the first PDU session is used to provide a relay service, and the first PDU session is used to provide a relay service for the first remote terminal by the relay terminal;

The processing unit is further configured to send the aggregate maximum bit rate AMBR of the first PDU session to the SMF through the communication unit according to the fourth indication information and the fifth indication information, and the first The AMBR of the PDU session is specifically the AMBR corresponding to the first PDU session when the relay service is provided.
A communication device, characterized by comprising: a processor;

The processor is connected to a memory, and the memory is used to store computer-executable instructions, and the processor executes the computer-executable instructions stored in the memory, so that the communication device implements any one of claims 1-6 , Or, any of claims 7-11, or, any of claims 12-14, or, claim 15, or, any of claims 16-17, or, any of claims 18-19 , Or, the method of claim 20.
A computer-readable storage medium, characterized by comprising instructions, which when run on a computer, cause the computer to execute any one of claims 1-6, or any one of claims 7-11 , Or, any of claims 12-14, or, claim 15, or, any of claims 16-17, or, any of claims 18-19, or, the method of claim 20.
A computer program product, characterized in that it comprises instructions, which when run on a computer, cause the computer to execute any one of claims 1-6, or any one of claims 7-11, or , Any one of claims 12-14, or claim 15, or any one of claims 16-17, or any one of claims 18-19, or, the method of claim 20.