WO2023061048A1

WO2023061048A1 - Communication method and apparatus, and device

Info

Publication number: WO2023061048A1
Application number: PCT/CN2022/114052
Authority: WO
Inventors: 邢玮俊; 丁辉; 吴问付
Original assignee: 华为技术有限公司
Priority date: 2021-10-14
Filing date: 2022-08-22
Publication date: 2023-04-20
Also published as: CN115988602A

Abstract

Disclosed in the present application are a communication method and apparatus, and a device, which are used for connecting a terminal device to a relay device. The method comprises: after learning that a terminal device is allowed to be connected to a relay device, an AN device to which the terminal device is connected being capable of notifying the terminal device of a resource for detecting a reference signal, and according to a measurement result of a reference signal of a first relay device that is detected by the terminal device on the resource, connecting the terminal device to the first relay device, so that the terminal device is successfully connected to the first relay device.

Description

A communication method, device and equipment

Cross References to Related Applications

This application claims priority to a Chinese patent application filed with the China Patent Office on October 14, 2021, with application number 202111197438.X, and application title "A Communication Method, Device, and Equipment," the entire contents of which are hereby incorporated by reference In this application.

technical field

The present application relates to the technical field of communication, and in particular to a communication method, device and equipment.

Background technique

With the development of mobile communication systems, the requirements for communication quality are getting higher and higher. For example, the current mobile communication system (eg, the 5th generation (5G) communication system) introduces the concept of a small cell. A small cell is a base station with a small coverage area, which can communicate with a macro base station and provide network access services for terminal devices within the coverage area of the small cell. Serving the terminal equipment through the small station can improve the communication quality of the terminal equipment and provide users with better services.

The mobile communication system introduces the concept of a small cell, that is, a small cell can be used as a relay device for a terminal device to provide relay services for terminal devices near the small cell, so that the terminal device can access the base station and thus connect to the network. Exemplarily, a small station serving as a relay device may be installed in a vehicle (for example, a vehicle, a ship, etc.).

Currently, there is a need for a method for a terminal device to access such a relay device.

Contents of the invention

Embodiments of the present application provide a communication method, device, and equipment, so as to connect terminal equipment to relay equipment.

In a first aspect, the embodiment of the present application provides a communication method. This method can be applied to the communication system shown in FIG. 1 below. Hereinafter, the AN device accessed by the terminal device is referred to as the first AN device, and the AN device accessed by the first relay device is referred to as the second AN device. The method includes:

After obtaining the authorization information for the terminal device, the first AN device may send an indication to the terminal device, so as to instruct the terminal device to detect resources of the reference signal. Wherein, the authorization information for the terminal device may indicate that the terminal device is allowed to access the relay device. After receiving the measurement report from the terminal device, the first AN device may connect the terminal device to the first relay device according to the authorization information for the terminal device and the measurement result in the measurement report; wherein, the measurement result may be that the terminal device It is obtained by detecting the reference signal of the first relay device according to the resource of the terminal device detecting the reference signal.

Through this method, after knowing that the terminal device is allowed to access the relay device, the first AN device can notify the terminal device to detect the resource of the reference signal, and according to the reference signal of the first relay device detected by the terminal device on the resource, The measurement result of the terminal device is connected to the first relay device, so that the terminal device is successfully connected to the first relay device.

In a possible design, the first AN device may receive authorization information for the terminal device from the AMF.

In a possible design, the first AN device may obtain an indication of resources used to instruct the terminal device to detect the reference signal in at least one of the following ways:

Way 1: The first AN device receives the indication from the second AN device or the control plane network element; wherein, the resource is the resource scheduled by the second AN device for the relay device to send the reference signal.

Way 2: The first AN device may generate a first indication after receiving the connection establishment request from the first relay device; wherein, the connection establishment request is used to request the first relay device to access the first AN device, and the resource is The resource used by the relay device to send the reference signal scheduled by the first AN device.

Through this design, the first AN device can obtain resources for the relay device to send reference signals in various ways, and notify the terminal device connected to the first AN device of the indication information of the resource, thereby expanding the capacity of the terminal device The range of relay devices that can be accessed, thereby improving the success rate of connecting terminal devices to relay devices.

In a possible design, the authorization information for the terminal device may also indicate the conditions that the terminal device should meet when accessing the relay device, and the measurement result may indicate the reference signal of the first relay device detected by the terminal device based on the resource signal quality; when the terminal device meets the conditions indicated by the authorization information for the terminal device when the terminal device accesses the relay device, the first AN device can connect the terminal device to the relay device according to the signal quality indicated by the measurement result. The first relay device.

Optionally, the conditions that the terminal device should meet when accessing the relay device may include, but are not limited to, at least one of the following: the location information of the terminal device when the terminal device accesses the relay device, and the location information of the terminal device when the terminal device accesses the relay device. area information of the terminal device, time information for the terminal device to access the relay device, information about the relay device that the terminal device is allowed to access, and preference information for the terminal device to select the relay device.

Through this design, the first AN device can control the access of the terminal device to the relay device according to information such as the location, time and/or preference of the terminal device when accessing the relay device, thereby improving the efficiency of connecting the terminal device to the relay device. device success rate.

In a possible design, after obtaining the authorization information for the first relay device, the first AN device may also send the terminal device to the The device is connected to the first relay device. Wherein, the authorization information for the first relay device may indicate that the first relay device is allowed to provide the relay service.

In this design, the first AN device can also control the access of the terminal device to the relay device according to the authorization information of the relay device, thereby improving the success rate of connecting the terminal device to the relay device.

In a possible design, the first AN device may obtain the authorization information for the first relay device through but not limited to the following ways: receiving the authorization information for the first relay device from the AMF; or receiving the authorization information for the first relay device from the second Authorization information of the AN device for the first relay device.

In a possible design, the authorization information for the terminal device may also indicate the conditions that the terminal device should meet when accessing the relay device, and the authorization information for the first relay device may also instruct the first relay device to provide relay Conditions that should be met during service, the measurement result is used to indicate the signal quality of the reference signal of the first relay device detected by the terminal device according to the resource; When the conditions that should be met when relaying the device, and the first relay device satisfies the conditions that the first relay device should meet when providing the relay service indicated by the authorization information for the first relay device, the first AN device can measure According to the signal quality indicated by the result, connect the terminal device to the first relay device.

Optionally, the conditions that the first relay device should meet when providing the relay service may include, but are not limited to, at least one of the following: the location information of the first relay device when the first relay device provides the relay service, the first The path information of the first relay device when the relay device provides the relay service, the area information of the first relay device when the first relay device provides the relay service, the time information of the first relay device providing the relay service, the allowed access Enter the terminal device information of the first relay device.

Through this design, the first AN device can send information to the terminal device based on information such as the location, time, and/or preference when the terminal device accesses the relay device, and the location, time, and other information when the first relay device provides relay services. The access to the relay device is controlled, so that the success rate of connecting the terminal device to the relay device can be improved.

In a possible design, the first AN device can connect the terminal device to the first relay device in the following ways, but not limited to:

Manner 1: The first AN device may send an indication to the terminal device to instruct the terminal device to access the first relay device.

In this way, the first AN device can control the terminal device to access the first relay device.

Mode 2: When the second AN device is an AN device accessed by the first relay device, the first AN device may exchange a first handover request and a first handover response with the first relay device through the second AN device. Wherein, the first switching request may request to switch the terminal device from the first AN device to the first relay device; the first switching response may indicate that the first relay device allows switching the terminal device from the first AN device to the first relay device equipment. Then, the first AN device may send a first switching command to the terminal device, where the first switching command is used to instruct the terminal device to switch from the first AN device to the first relay device.

In this manner, the first AN device can exchange messages in the handover process with the first relay device through the second AN device, so that the terminal device can be successfully handed over to the first relay device.

Mode 3: When the first AN device is an AN device accessed by the first relay device, the first AN device may send a second handover request to the first relay device, wherein the second handover request may request to transfer the terminal device from The first AN device switches to the first relay device; the first AN device may send a second switching command to the terminal device after receiving the second switching response from the first relay device, where the second switching response may indicate that the first A relay device allows switching the terminal device from the first AN device to the first relay device, and the second switching command may instruct the terminal device to switch from the first AN device to the first relay device.

In this manner, the first AN device can exchange messages in the handover process with the first relay device, so that the terminal device can be successfully handed over to the first relay device.

In a second aspect, the embodiment of the present application provides a communication method. This method can be applied to the communication system shown in FIG. 1 below. Hereinafter, the AN device accessed by the terminal device is referred to as the first AN device, and the AN device accessed by the first relay device is referred to as the second AN device. The method includes:

After the AMF obtains the authorization information for the terminal device, if it is determined according to the authorization information for the terminal device that the terminal device is allowed to access the relay device when accessing the first AN device, the AMF sends a request to the first AN device. Authorization information of the terminal device; wherein, the authorization information for the terminal device may indicate that the terminal device is allowed to access the relay device; and/or

After the AMF obtains the authorization information for the first relay device, if it determines that the first relay device accesses the second AN device according to the authorization information for the first relay device, it allows the first relay device to provide relay service, then send authorization information for the first relay device to the second AN device; wherein, the authorization information for the first relay device may indicate that the first relay device is allowed to provide the relay service.

In this method, when the AMF determines that the terminal device is allowed to access the relay device when the terminal device accesses the first AN device, it sends a message to the first AN device that can indicate that the terminal device is allowed to access the relay device. Authorization information; when it is determined that the first relay device is allowed to provide relay services when accessing the second AN device, it will send an indication to the second AN device that the first relay device is allowed to provide relay The authorization information of the service is directed to the first relay device, thereby avoiding unnecessary transmission of authorization information, thereby saving signaling overhead and saving transmission resources.

In a possible design, the AMF may receive subscription information for the terminal device from the UDM or UDR; where the subscription information for the terminal device includes authorization information for the terminal device. Alternatively, the AMF may also receive policy information for the terminal device from the PCF; where the policy information for the terminal device includes authorization information for the terminal device.

In this design, the AMF can obtain the authorization information for the terminal device in multiple ways, thereby improving the flexibility of obtaining the authorization information.

In a possible design, the AMF may receive subscription information for the first relay device from the UDM or UDR, where the subscription information for the first relay device includes authorization information for the first relay device. Alternatively, the AMF may also receive policy information for the first relay device from the PCF, where the policy information for the first relay device includes authorization information for the first relay device.

In this design, the AMF can obtain the authorization information for the first relay device in multiple ways, so that the flexibility of obtaining the authorization information can be improved.

In a possible design, the AMF may obtain authorization information for the terminal device after determining that the terminal device has the capability of accessing the relay device. The AMF can determine that the terminal device has the capability of accessing the relay device through but not limited to the following methods.

The AMF acquires the first capability information of the terminal device, where the first capability information is used to indicate that the terminal device has the capability of accessing the relay device.

After acquiring the second capability information of the terminal device, the AMF may determine, according to the second capability information, that the terminal device has the capability of accessing the relay device.

In this design, the AMF acquires the authorization information for the terminal device only when the terminal device has the capability of accessing the relay device, thereby saving signaling overhead and transmission resources.

In a possible design, the AMF may acquire authorization information for the first relay device after determining that the first relay device is capable of providing relay services. The AMF may determine that the first relay device is capable of providing the relay service through, but not limited to, the following manners.

The AMF acquires third capability information of the first relay device, where the third capability information may indicate that the first relay device has a capability of providing a relay service.

After acquiring the fourth capability information of the first relay device, the AMF may determine, according to the fourth capability information, that the first relay device has the capability of providing the relay service.

In this design, the AMF acquires the authorization information for the first relay device only when the first relay device has the capability of providing the relay service, so that signaling overhead and transmission resources can be saved.

In a possible design, the authorization information for the terminal device may also indicate the conditions that the terminal device should meet when accessing the relay device; the authorization information for the first relay device may also instruct the first relay device to provide relay Conditions that should be met when serving.

Optionally, the conditions to be met when the terminal device accesses the relay device may include at least one of the following: location information of the terminal device when the terminal device accesses the relay device, area information of the terminal device when the terminal device accesses the relay device , the time information when the terminal device accesses the relay device, the information of the relay device that the terminal device is allowed to access, and the preference information for the terminal device to select the relay device; the conditions that the first relay device should meet when providing the relay service may include the following At least one item: location information of the first relay device when the first relay device provides relay services, path information of the first relay device when the first relay device provides relay services, and relay information provided by the first relay device The area information of the first relay device during service, the time information of the first relay device providing the relay service, and the terminal device information allowed to access the first relay device.

Through this design, the AMF sends the conditions that the terminal device should meet when accessing the relay device and/or the conditions that the first relay device should meet when providing the relay service to the first AN device, so that the first AN device can Information such as the location, time, and/or preference of the terminal device when it accesses the relay device, and/or information such as the location and time when the first relay device provides relay services, to control the terminal device's access to the relay device, Therefore, the success rate of connecting the terminal device to the relay device can be improved.

In a third aspect, the embodiment of the present application provides a communication method. This method can be applied to the communication system shown in FIG. 1 below. Hereinafter, the AN device accessed by the terminal device is referred to as the first AN device, and the AN device accessed by the first relay device is referred to as the second AN device. The method includes:

After receiving the indication from the first AN device, the terminal device may detect the reference signal on the resource indicated by the indication, generate a measurement report, and send the measurement report to the first AN device. Wherein, the indication may instruct the terminal device to detect the resource of the reference signal, the measurement report may include the measurement result of the reference signal of the first relay device detected by the terminal device, and the measurement report may trigger the first AN device to use the authorization information for the terminal device to As well as the measurement result, the terminal device is connected to the first relay device, and the authorization information for the terminal device may indicate that the terminal device is allowed to access the relay device.

Through this method, the terminal device can obtain the measurement result of the reference signal of the first relay device detected by the terminal device on the resource according to the resource of the terminal device detection reference signal indicated by the first AN device, and will include the measurement result of the measurement result The report is sent to the first AN device. In this way, the first AN device can successfully connect the terminal device to the first relay device according to the measurement result and the authorization information for the terminal device used to indicate that the terminal device is allowed to access the relay device.

In a possible design, before sending the measurement report to the first AN device, the terminal device may send the first capability information or the second capability information to the first AN device; wherein, the first capability information may indicate that the terminal device has access The capability of accessing the relay device; the second capability information may be used by the first AN device to determine whether the terminal device has the capability of accessing the relay device.

In this design, the terminal device reports capability information to the first AN device. In this way, the first AN device or AMF obtains the authorization information for the terminal device only when it determines that the terminal device has the capability of accessing the relay device, so that signaling overhead and transmission resources can be saved.

In a possible design, after sending the measurement report to the first AN device, the terminal device can access the first relay device in the following ways, but not limited to:

Way 1: After receiving the instruction from the first AN device for instructing the terminal device to access the first relay device, the terminal device accesses the first relay device according to the instruction.

Mode 2: The terminal device may switch from the first AN device to the first relay device after receiving a switch command from the first AN device, wherein the switch command may instruct the terminal device to switch from the first AN device to the first relay device. relay device.

With this design, the terminal device can access or switch to the first relay device under the instruction of the first AN device.

In a fourth aspect, the embodiment of the present application provides a communication method. This method can be applied to the communication system shown in FIG. 1 below. The core network device can be any one of UDM, UDR, and PCF. The method includes:

The AF sends a request for the terminal device to the core network device, requesting the core network device to allow the terminal device to access the relay device; wherein, the request for the terminal device may include the conditions that the terminal device should meet when accessing the relay device information; and/or

The AF sends a request for the first relay device to the core network device, requesting the core network device to allow the first relay device to provide the relay service; wherein, the request for the first relay device may include instructions for indicating the first relay device Information about the conditions that should be met when the device provides the relay service.

Through this method, the mobile communication system can provide information about the terminal device's access to the terminal device according to the location, time, and/or preference information when the terminal device accesses the relay device, as well as the location, time, and other information when the first relay device provides relay services. The access relay device is controlled, so that the success rate of connecting the terminal device to the relay device can be improved.

In a fifth aspect, the embodiment of the present application provides a communication device, including a unit for performing each step in any one of the above aspects.

In a sixth aspect, the embodiment of the present application provides a communication device, including at least one processing element and at least one storage element, wherein the at least one storage element is used to store programs and data, and the at least one processing element is used to read and execute The program and data stored in the storage element enable the method provided by any one of the above aspects of the present application to be realized.

In the seventh aspect, the embodiment of the present application provides a communication system, including: a first AN device for executing the method provided in the first aspect, an AMF for executing the method provided in the second aspect, and an AMF for executing the method in the third aspect The terminal device for the provided method.

In an eighth aspect, the embodiment of the present application further provides a computer program, which, when the computer program is run on a computer, causes the computer to execute the method provided in any one of the above aspects.

In the ninth aspect, the embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a computer, the computer is made to execute the method provided in any one of the above-mentioned aspects.

In the tenth aspect, the embodiment of the present application further provides a chip, the chip is used to read the computer program stored in the memory, and execute the method provided in any one of the above aspects.

In an eleventh aspect, an embodiment of the present application further provides a chip system, where the chip system includes a processor, configured to support a computer device to implement the method provided in any one of the above aspects. In a possible design, the chip system further includes a memory, and the memory is used to store necessary programs and data of the computer device. The system-on-a-chip may consist of chips, or may include chips and other discrete devices.

The technical effects that can be achieved by any one of the above-mentioned fifth to eleventh aspects can be described with reference to the technical effects that can be achieved by any one of the possible designs of any one of the above-mentioned first to fourth aspects, and the repetitions will not be repeated. discuss.

Description of drawings

FIG. 1 is an architecture diagram of a communication system provided by an embodiment of the present application;

FIG. 2A is a flow chart of the first communication method provided by the embodiment of the present application;

FIG. 2B is a flow chart of a switching method in the first communication method provided by the embodiment of the present application;

FIG. 2C is a flow chart of another switching method in the first communication method provided by the embodiment of the present application;

FIG. 3 is a schematic diagram of an application scenario of an embodiment of the present application;

FIG. 4 is a flowchart of a second communication method provided by an embodiment of the present application;

FIG. 5 is a flowchart of a third communication method provided by an embodiment of the present application;

FIG. 6 is a flowchart of a fourth communication method provided by an embodiment of the present application;

FIG. 7 is a flowchart of a fifth communication method provided by an embodiment of the present application;

FIG. 8 is a flowchart of a sixth communication method provided by an embodiment of the present application;

FIG. 9 is a flowchart of a seventh communication method provided by an embodiment of the present application;

FIG. 10 is a flowchart of an eighth communication method provided by an embodiment of the present application;

FIG. 11 is a structural diagram of a communication device provided by an embodiment of the present application;

FIG. 12 is a structural diagram of a communication device provided by an embodiment of the present application.

Detailed ways

The present application provides a communication method, device and equipment for connecting a terminal device to a relay device. Among them, the method, device and equipment are based on the same technical conception. Since the principles of solving the problems are similar, the implementation of the device, device and method can be referred to each other, and the repetition will not be repeated.

Through the solution provided by the embodiment of this application, the access network (access network, AN) device accessed by the terminal device can notify the terminal device of the resources of the detection reference signal after knowing that the terminal device is allowed to access the relay device, and according to the terminal The measurement result of the reference signal of the first relay device detected by the device on the resource connects the terminal device to the first relay device, so that the terminal device successfully connects to the first relay device.

In the following, some terms used in the embodiments of the present application are explained, so as to facilitate the understanding of those skilled in the art.

1) Communication equipment, generally refers to equipment with communication functions. Exemplarily, the communication device may be, but not limited to, a terminal device, an AN device, an access point, a core network (core network, CN) device, and the like.

2) A terminal device is a device that provides voice and/or data connectivity to users. The terminal equipment may also be called user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) and so on.

For example, the terminal device may be a handheld device with a wireless connection function, a vehicle-mounted device, and the like. At present, examples of some terminal devices are: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) device, enhanced Augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart grid Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.

3) The AN device is a device for connecting a terminal device to a wireless network in a mobile communication system. The AN device, as a node in the wireless access network, may include: a base station, a broadband network gateway (broadband network gateway, BNG), an aggregation switch, and a non-3GPP access device. The AN device may also be called a base station, a radio access network (radio access network, RAN) node (or device), an access point (access point, AP), and a network device.

At present, some examples of AN equipment are: new generation Node B (generation Node B, gNB), transmission reception point (transmission reception point, TRP), evolved Node B (evolved Node B, eNB), wireless network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B , HNB), base band unit (base band unit, BBU), macro base station (for example, macro Node B, or macro eNB, or macro gNB), micro base station (also called small cell), or relay station, etc.

In addition, in a network structure, the AN device may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node. This structure separates the protocol layers of the AN device, and the functions of some protocol layers are placed in the CU for centralized control, and the remaining part or all of the functions of the protocol layers are distributed in the DU, and the CU centrally controls the DU.

4) The CN equipment of the core network is a network element included in the CN part of the mobile communication system. The CN device can connect terminal devices to different data networks, and perform services such as charging, mobility management, session management, and user plane forwarding. In mobile communication systems of different standards, names of CN devices with the same function may be different. However, the embodiment of the present application does not limit the specific name of the CN device with each function.

For example, in the ^4th generation (4G) mobile communication system (ie, long term evolution (LTE), the network element responsible for access control, security control, signaling coordination and other functions is a mobility management entity (Mobile management entity, MME); the network element serving as the anchor point of local mobile management is the serving gateway (serving gateway, S-GW); as the anchor point of the handover of the external data network, it is responsible for Internet protocol (internet protocol, IP) address allocation The network element of the packet data network (PDN) gateway (PDN gateway, P-GW); the network element that stores user-related data and subscription data is the home subscription server (home subscriber server, HSS); responsible for policy, plan A network element with a charging function is called a policy and charging control rule function (policy and charging rule function, PCRF) network element.

For another example, in a 5th generation (5 ^th generation, 5G) mobile communication system, according to specific logical function divisions, the core network can be divided into a control plane (control plane, CP) and a user plane (user plane, UP). Wherein, network elements responsible for control plane functions in the CN may be collectively referred to as control plane network elements, and network elements responsible for user plane functions may be collectively referred to as user plane network elements. Specifically, on the user plane, the network element serving as an interface of the data network and responsible for functions such as user plane data forwarding is a user plane function (user plane function, UPF) network element. In the control plane, network elements responsible for access control and mobility management functions are called access and mobility management function (access and mobility management function, AMF) network elements; network elements responsible for session management and control policy execution are called It is a session management function (session management function, SMF) network element; the network element responsible for managing subscription data, user access authorization and other functions is called a unified data management (unified data management, UDM) network element; responsible for billing, policy control functions The network element is called policy control function (Policy and charging function, PCF) network element; the application function (application function, AF) network element responsible for transmitting the requirements of the application side to the network side.

5) The data network (data network, DN) is a network located outside the mobile communication system. For example, the DN can be a packet data network (PDN), such as the Internet (Internet), IP Multi-media Service (IMS) network, some application-specific data networks, Ethernet, IP local network etc., this application does not limit it. A variety of services can be deployed on the DN, which can provide data and/or voice services for terminal equipment.

6). The Uu interface is the interface between the terminal equipment and the AN equipment. Terminal equipment can interact with AN equipment through the Uu interface.

The PC5 interface is an interface between terminal devices and an interface for direct communication between terminal devices.

In the embodiments of the present application, for the number of nouns, unless otherwise specified, it means "singular noun or plural noun", that is, "one or more". "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three kinds of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character "/" generally indicates that the contextual objects are an "or" relationship. For example, A/B means: A or B. "At least one (individual) of the following" or similar expressions refer to any combination of these items (individuals), including any combination of a single item (individuals) or a plurality of item (individuals).

In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used to distinguish the purpose of description, and should not be interpreted as indicating or implying relative importance, nor should they be understood as To indicate or imply an order.

The communication system applied in the embodiment of the present application will be described below with reference to the accompanying drawings.

FIG. 1 shows the architecture of a possible communication system to which the communication method provided by the embodiment of the present application is applicable. As shown in FIG. 1 , the communication system includes three parts: terminal equipment (UE is taken as an example in the figure), a mobile communication system and a DN. These three parts are described separately below.

The terminal device is an entity capable of receiving and transmitting wireless signals on the user side, and needs to access the DN through the mobile communication system. Optionally, the terminal device can serve as a relay device for other data collectors or other terminal devices, so that these devices can communicate with the DN through the mobile communication system.

A mobile communication system can access at least one DN, and the same DN can also be accessed by at least one mobile communication system. Among them, the mobile communication system may include two parts, AN and CN.

The network device deployed in the AN is an AN device, which is specifically responsible for wireless access, wireless resource management on the air interface side, quality of service (QoS) management, data compression and encryption, user plane data forwarding, and CN network elements Perform functions such as signaling interaction.

Network elements deployed in the CN may be collectively referred to as CN equipment. Taking the CN in the 5G mobile communication system as an example, the functions of the main network elements in the CN are introduced in detail below. From the above description, it can be seen that the network elements in the CN of the 5G mobile communication system can be divided into two types: control plane network elements and user plane network elements.

The user plane network element includes a user plane function (UPF), which is mainly responsible for packet forwarding, QoS control, and accounting information statistics. The embodiment of the present application can also be used in the following scenarios: devices such as on-site sensors are connected to the core network through the UE and the AN, and data transmission is performed on the user plane through the UPF.

The network elements of the control plane are mainly responsible for service process interaction, delivering data packet forwarding policies and QoS control policies to the user plane. The control plane network elements mainly include: AMF, SMF, PCF, AF, network exposure function (network exposure function, NEF), UDM, unified data repository (unified data repository, UDR) (not shown in the figure), authentication server function ( authentication server function, AUSF), network slice selection function (network slice selection function, NSSF), network function storage function (network function (network function, NF) repository function, NRF).

Among them, AMF is mainly responsible for UE access management and mobility management, for example, responsible for UE state maintenance, UE reachability management, non-mobility management (mobility management, MM) non-access-stratum (non-access-stratum) , NAS) message forwarding, etc.

The SMF is mainly responsible for the session management of the UE, for example, managing the establishment and deletion of the PDU session, maintaining the PDU session context, and so on.

PCF is mainly responsible for policy control, for example, generating and/or managing user, session, and QoS flow processing policies, sending UE policy information to UE, sending UE access management policy to AMF, and sending session management policy to SMF, etc.

AF is mainly responsible for providing various business services. It can interact with the core network through NEF and interact with the policy management framework for policy management.

The NEF is mainly responsible for opening core network capabilities or information to application servers outside the core network or network elements outside the mobile communication system (for example, third-party application function network elements).

UDM is mainly responsible for user subscription data management, user identification management, etc.

UDR is mainly responsible for storing user subscription or authorization data, storing application-related data, etc. Data managed by UDM can be saved in UDR.

The AUSF is mainly responsible for performing UE security authentication.

NSSF is mainly responsible for selecting network slices for UE.

The NRF is mainly responsible for providing storage and selection functions for network function entity information for other network elements.

In addition, FIG. 1 shows the interaction relationship and corresponding interfaces between network elements in the communication system. For example, the interaction between the UE and the AMF can be through the N1 interface, and the interaction between the AN device and the AMF entity can be through the N2 interface. The interfaces between other network elements can be referred to as shown in FIG. 1 , and will not be repeated here. UDR can interact with other network elements through UDM.

It should be noted that the communication system shown in FIG. 1 does not constitute a limitation to the applicable communication system of the embodiment of the present application. Therefore, the communication method provided by the embodiment of the present application can also be applied to communication systems of various standards, for example: long term evolution (long term evolution, LTE) communication system, 5G communication system, sixth generation (The 6th Generation, 6G) communication system And future communication system, vehicle to everything (vehicle to everything, V2X), long-term evolution - vehicle networking (LTE-vehicle, LTE-V), vehicle to vehicle (vehicle to vehicle, V2V), vehicle networking, machine type communication (Machine Type Communications (MTC), Internet of Things (IoT), Long Term Evolution-Machine to Machine (LTE-Machine to Machine, LTE-M), Machine to Machine (M2M), Internet of Things, etc. In addition, it should be noted that the embodiment of the present application does not limit the names of the network elements in the communication system. For example, in communication systems of different standards, each network element may have other names; When elements are fused in the same physical device, the physical device can also have other names.

The solutions provided by the present application will be described below in conjunction with the accompanying drawings. An embodiment of the present application provides a communication method, which can be applied to the communication system shown in FIG. 1 . Referring to the flow chart shown in FIG. 2A , the flow of the method will be described in detail. For ease of distinction and description, the AN device accessed by the terminal device is referred to as the first AN device, and the AN device accessed by the first relay device is referred to as the second AN device.

S201: The first AN device acquires authorization information for the terminal device. The authorization information for the terminal device may indicate that the terminal device is allowed to access the relay device.

In some possible implementation manners, the first AN device may acquire authorization information for the terminal device in a registration process of the terminal device. For example, the first AN device may acquire authorization information for the terminal device after receiving the registration request from the terminal device. Wherein, the registration request is used to request to register the terminal device in the mobile communication system where the first AN device is located.

In some possible implementation manners, the first AN device may acquire authorization information for the terminal device after determining that the terminal device has the capability of accessing the relay device.

Optionally, the first AN device may obtain authorization information for the terminal device after obtaining the first capability information of the terminal device. Wherein, the first capability information may indicate that the terminal device has the capability of accessing the relay device.

Optionally, after obtaining the second capability information of the terminal device, the first AN device may determine whether the terminal device has the capability of accessing the relay device according to the second capability information; when it is determined that the terminal device has the capability of accessing the relay device When the capability is available, the first AN device may acquire authorization information for the terminal device.

Wherein, the second capability information may be information that can be used to indirectly determine whether the terminal device has the capability of accessing the relay device. For example, the second capability information may indicate the capability that the terminal device can have only when it accesses the relay device. Exemplarily, the second capability information may indicate that the terminal device has UE cooperation (UE Cooperation, UC) capability. UE cooperation means that the relay link (relay link) and the direct link (direct link) of the terminal device are activated at the same time, and the terminal device can communicate with the AN device through the relay link and the direct link. Wherein, the relay link is the link between the relay device connected to the terminal device and the AN device accessed by the terminal device; the direct link is the link between the terminal device and the AN device accessed by the terminal device. Therefore, when the second capability information indicates that the terminal device has the capability of UE cooperation, the first AN device may determine that the terminal device has the capability of accessing the relay device.

The foregoing first capability information or second capability information may be carried in an existing message (for example, a registration request), or may be carried in a dedicated message for carrying capability information.

Through this implementation, the first AN device acquires authorization information for the terminal device only when it is determined that the terminal device has the capability of accessing the relay device. In this way, the first AN device does not need to obtain the authorization information of the terminal device not capable of accessing the relay device, thereby saving signaling overhead and saving transmission resources.

In this embodiment of the present application, the first AN device may receive authorization information for the terminal device from the AMF. Correspondingly, the AMF sends authorization information for the terminal device to the first AN device.

Optionally, the authorization information for the terminal device may be carried in existing information (for example, subscription information or policy information), or may be carried in a new information element.

In some possible implementation manners, the authorization information for the terminal device may include indication information of the terminal device (for example, an identity (identity, ID) of the terminal device). For example, when the first field corresponding to the authorization information for the terminal device in the subscription information or the policy information includes the identifier of the terminal device, it means that the terminal device is allowed to access the relay device.

In some other possible implementation manners, when the information including the authorization information for the terminal device includes the indication information of the terminal device, and when the second field of the authorization information for the terminal device is the first value, it means that the terminal device is allowed to access the relay device.

In addition, the authorization information for the terminal device may also indicate the conditions that the terminal device should meet when accessing the relay device. For example, the authorization information for the terminal device includes conditions that the terminal device should meet when accessing the relay device. For another example, the authorization information for the terminal device includes information used to indicate conditions that the terminal device should meet when accessing the relay device. For another example, the authorization information for the terminal device includes first information used to determine the conditions that the terminal device should meet when accessing the relay device. The conditions that the terminal device should meet when accessing the relay device can be determined according to the first information and the second information. An example is: the first information is the serial number, the second information is the serial number and the terminal device should access the relay device. For the corresponding relationship between the satisfied conditions, the first AN device can determine the conditions that should be satisfied when the terminal device accesses the relay device according to the received sequence number and the corresponding relationship.

For example, the location information of the terminal device when the terminal device accesses the relay device may be: geographic location information or a set of geographic location information of the terminal device when the terminal device is allowed to access the relay device.

For another example, when the terminal device accesses the relay device, the area information of the terminal device may include at least one of the following: one or more AN device identifications (identity, ID), one or more cell identifications (cell identity, cell ID), One or more tracking area identities (TAI). When the area information includes one or more AN device identifiers, the terminal device is allowed to access the relay device within the coverage of the AN device indicated by the one or more AN device identifiers. When the area information includes one or more cell identifiers, the terminal device is allowed to access the relay device in the cell indicated by the one or more cell identifiers. When the area information includes one or more TAIs, the terminal device is allowed to access the relay device within the area indicated by the one or more TAIs.

For another example, the time information for the terminal device to access the relay device may be a time set or a time range. The time information for the terminal device to access the relay device may indicate an absolute time, or may be an offset relative to a reference time.

For another example, the information about the relay devices that are allowed to be accessed by the terminal device may be indication information of the relay devices that are allowed to be accessed by the terminal device (for example, a list of identifiers of the relay devices that are allowed to be accessed by the terminal device).

For another example, the preference information for the terminal device to select the relay device may indicate at least one of the following: when there are AN devices and relay devices that the terminal device can access at the same time, the terminal device preferentially accesses the relay device; When there are AN devices and relay devices that can be accessed, the terminal device will preferentially access the AN device; or, when there is no AN device that the terminal device can access, the terminal device will access the relay device.

Through this method, the first AN device can determine the time, place, and/or preference of the terminal device to access the relay device according to the conditions that the terminal device should meet when accessing the relay device, so as to effectively control the terminal device to access the relay device. into the relay device.

S202: The first AN device sends an indication to the terminal device, so as to instruct the terminal device to detect resources of the reference signal. Correspondingly, the terminal device receives the indication from the first AN device.

Wherein, the first AN device may send an instruction to the terminal device according to the authorization information for the terminal device.

The first AN device may send an indication to the terminal device in but not limited to the following ways:

Method 1:

The first AN device sends the indication in a broadcast manner, and correspondingly, the terminal device may receive the indication broadcast by the first AN device.

Optionally, the indication may be carried in a system information block (system information block, SIB) or a master information block (master information block, MIB).

When the first AN device receives authorization information for at least one terminal device that accesses the first AN device, the first AN device may determine that there is a terminal device that is allowed to access the relay device among the terminal devices that access the first AN device . Then, the first AN device may send the indication in a broadcast manner. Wherein, the authorization information for at least one terminal device accessing the first AN device may indicate that at least one terminal device is allowed to access the relay device. The content of the authorization information for at least one terminal device accessing the first AN device may be the same as the authorization information for the terminal device, except that the terminal device in the authorization information for the terminal device is replaced with at least one terminal device for accessing the first AN device. The terminal device targeted by the authorization information of a terminal device will not be described in detail here.

Method 2:

The first AN device may send the indication to the terminal device in a unicast manner.

For example, the AN device may send a radio resource control (radio resource control, RRC) configuration message to the terminal device, and the RRC configuration message may include an indication.

Optionally, the first AN device may determine, according to the indication information of the terminal device in the authorization information for the terminal device, or according to the indication information of the terminal device in the information containing the authorization information for the terminal device, whether to allow access to the relay device. The terminal device then sends the first indication to the terminal device in a unicast manner.

Optionally, when the first AN device does not receive authorization information for any terminal device accessing the first AN device, the first AN device may determine that there is no terminal device that is allowed to access the first AN device. When the terminal device of the relay device, the first AN device may not send an indication. Wherein, the authorization information for any terminal device accessing the first AN device may indicate that any terminal device is allowed to access the relay device.

In this embodiment of the application, before the first AN device sends the indication to the terminal device, it may acquire the indication in at least one of the following ways:

method one:

The first AN device may receive an instruction from the second AN device or a control plane network element. The resource indicated by the indication is the resource scheduled by the second AN device for the relay device to send the reference signal.

For example, after receiving the registration request of the first relay device, the second AN device may schedule, for the first relay device, resources for the relay device to send a reference signal, and generate an indication. The second AN device may then send an indication to the other AN devices. The following takes the second AN device sending an instruction to the first AN device as an example for description.

Optionally, the second AN device may send an indication to the first AN device through an interface between AN devices (for example, an X2 interface or an Xn interface).

Optionally, the second AN device may also send an indication to the first AN device through a control plane network element. Specifically, the second AN device may send an instruction to a control plane network element, and the control plane network element sends an instruction to the first AN device.

Optionally, after determining the resource, the second AN device may send an indication to the first relay device. Then, the first relay device may send the reference signal on the resource.

Method 2:

The first AN device and the second AN device are the same AN device. The first AN device generates an indication after receiving the connection establishment request from the first relay device. Wherein, the connection establishment request may request to connect the first relay device to the first AN device, and indicate that the indicated resource is a resource scheduled by the first AN device for the relay device to send a reference signal.

Optionally, after determining the resources, the first AN device may send an indication to the first relay device. Then, the first relay device may send the reference signal on the resource.

In addition, the first AN device may also send the indication to other AN devices after generating the indication. For the sending method, refer to Method 1, which will not be repeated here.

It should be understood that after a relay device other than the first relay device accesses the AN device (for ease of distinction, it will be referred to as the third AN device below), the third AN device may also be scheduled for the relay device to send resources of the reference signal, and generate an indication for instructing the relay device to send the resource of the reference signal. When the first AN device and the third AN device are different AN devices, the first AN device can obtain the indication through the above method 1; when the first AN device and the third AN device are the same AN device, the first AN device Instructions can be obtained through the second method above.

It should also be understood that the first AN device may obtain multiple indications for instructing the relay device to send reference signal resources. The indication a is used to indicate the resource b allocated by the AN device b to the relay device, the indication b is used to indicate the resource c allocated by the first AN device to the relay device. The first AN device may send all the obtained multiple indications to the terminal device, so that the terminal device may select multiple resources (for example, resource a, resource b) indicated by the multiple indications (for example, indication a, indication b, and indication c). and resource c), the reference signal is detected.

Optionally, when the first AN device obtains the indication from the second AN device, the indication may further include indication information of the first relay device and indication information of the second AN device. When the first AN device obtains the indication from the third AN device, the indication may further include indication information of a relay device accessing the third AN device and indication information of the third AN device.

Wherein, the indication information of the first relay device may be an ID of the first relay device. The indication information of the second AN device may include: the ID and/or address of the second AN device. The indication information of the relay device accessing the third AN device may be an ID of the relay device accessing the third AN device. The indication information of the third AN device may include: the ID and/or address of the third AN device.

S203: The terminal device detects the reference signal on the resource indicated by the first AN device, and generates a measurement report.

Optionally, the terminal device may detect a reference signal of at least one relay device on the resource indicated by the first AN device, and generate a measurement report. Wherein, the measurement report includes the measurement result of the terminal device on the reference signal of at least one relay device. In this embodiment of the present application, at least one relay device includes a first relay device.

Wherein, the measurement result may indicate: the signal quality of the reference signal of at least one relay device detected by the terminal device on the resource indicated by the first indication. For example, the measurement result may include: the ID of each relay device in the at least one relay device, and the signal quality of the reference signal of each relay device.

S204: The terminal device sends a measurement report to the first AN device. Correspondingly, the first AN device receives the measurement report from the terminal device.

Wherein, the measurement report may trigger the first AN device to connect the terminal device to the relay device according to the authorization information for the terminal device and the measurement result.

S205: The first AN device connects the terminal device to the first relay device according to the authorization information for the terminal device and the measurement result.

In some possible implementation manners, when the terminal device meets the conditions indicated in the authorization information for the terminal device that the terminal device should meet when accessing the relay device, the first AN device may send the terminal device to the relay device according to the signal quality indicated by the measurement result. The device is connected to the first relay device.

For example, when the terminal device meets the conditions indicated by the authorization information for the terminal device when the terminal device accesses the relay device, the first AN device may select the relay device with the best signal quality of the reference signal according to the measurement result, That is, the first relay device; and then connect the terminal device to the first relay device.

For another example, when the terminal device satisfies the conditions indicated by the authorization information for the terminal device that should be met when the terminal device accesses the relay device, the first AN device may select the intermediate device whose signal quality of the reference signal exceeds the first threshold according to the measurement result. The relay device, that is, the first relay device; and then connect the terminal device to the first relay device. Optionally, when the relay devices whose signal quality exceeds the first threshold include multiple relay devices, the first AN device may randomly select a relay device from the multiple relay devices, that is, the first relay device, or , select a relay device with the smallest load from the multiple relay devices, that is, the first relay device.

In the embodiment of this application, the first AN device can connect the terminal device to the first relay device through but not limited to the following implementation methods:

Implementation method one:

The first AN device sends an indication for instructing the terminal device to access the first relay device to the terminal device.

The terminal device may access the first relay device after receiving the instruction from the first AN device for instructing the terminal device to access the first relay device. For example, the terminal device sends a connection establishment request to the first relay device, thereby initiating a connection establishment procedure for the terminal device to access the first relay device.

Optionally, the indication for instructing the terminal device to access the first relay device may include indication information of the first relay device. The terminal device may send a connection establishment request to the first relay device according to the indication information of the first relay device.

Through this implementation manner, the terminal device can access the first relay device under the instruction of the first AN device.

Implementation method two:

When the first AN device and the second AN device are not the same AN device, the first AN device can send a switching request to the first relay device through the second AN device to switch the terminal device from the first AN device to the first relay device. relay device. The process will be described below with reference to FIG. 2B .

S2051a: The first AN device sends a first switching request to the second AN device. The first handover request may request handover of the terminal device from the first AN device to the first relay device.

Optionally, before sending the first handover request to the second AN device, the first AN device may determine the second AN device accessed by the first relay device according to at least one of the following items: the first AN device included in the measurement result The indication information of the relay device is used to indicate the indication information of the relay device and the indication information of the AN device contained in the indication of the resources of the terminal device to detect the reference signal.

In addition, the first switching request may include indication information of the first relay device.

S2052a: The second AN device sends a first switching request to the first relay device.

S2053a: The first relay device sends a first handover response to the second AN device. The first handover response may indicate that the first relay device allows handover of the terminal device from the first AN device to the first relay device.

S2054a: The second AN device sends a first handover response to the first AN device.

S2055a: The first AN device sends a first switching command to the terminal device. The first switching command may instruct the terminal device to switch from the first AN device to the first relay device.

Wherein, the first switching command may include indication information of the first relay device.

S2056a: The terminal device switches from the first AN device to the first relay device according to the first switching command.

Through this implementation manner, the first AN device can exchange information required for handover with the first relay device through the second AN device, so that the terminal device can be handed over to the first relay device.

Implementation method three:

When the first AN device and the second AN device are the same AN device, the first AN device may send a switching request to the first relay device, so as to switch the terminal device from the first AN device to the first relay device. The process will be described below with reference to FIG. 2C .

S2051b: The first AN device sends a second switching request to the first relay device. The second handover request may request handover of the terminal device from the first AN device to the first relay device.

Optionally, before sending the second switching request to the first relay device, the first AN device may determine that the AN device accessed by the first relay device is First AN device.

Wherein, the second handover request may include indication information of the first relay device.

S2052b: The first AN device receives the second handover response from the first relay device. The second handover response may indicate that the first relay device allows handover of the terminal device from the first AN device to the first relay device.

S2053b: The first AN device sends a second switching command to the terminal device. The second switching command may instruct the terminal device to switch from the first AN device to the first relay device.

Wherein, the handover command may include indication information of the first relay device.

S2054b: The terminal device switches from the first AN device to the first relay device according to the second switching command.

Through this implementation manner, the first AN device can exchange messages required for handover with the first relay device, so that the terminal device can be handed over to the first relay device.

The embodiment of the present application provides a communication method. In this solution, the AN device accessed by the terminal device can notify the terminal device of the resource of the detection reference signal after learning that the terminal device is allowed to access the relay device, and according to the terminal device's The measurement result of the reference signal of the first relay device detected on the resource, and the authorization information for the terminal device, and the terminal device is connected to the first relay device, so that the terminal device is successfully connected to the first relay device .

FIG. 3 is a schematic diagram of an example of applying the communication method shown in FIG. 2A in a mobile communication system provided by the present application. The application of the method shown in FIG. 2A in the application scenario shown in FIG. 3 will be described below with reference to FIG. 3 .

As shown in Figure 3, the CN device (for example, the 5GC in the figure) of the mobile communication system (for example, the 5G communication system) can communicate with the relay device (for example, the vehicle-mounted relay in the figure) through the AN device (for example, the vehicle-mounted relay, VMR)) exchange information; the CN device can interact with the application server (AS); there is an interface between the relay device and the AN device (for example, the Uu interface in the figure); the terminal device (that is, the UE in the figure) There is an interface with the relay device (for example, the Uu interface in the figure, the PC5 interface, or other communication interfaces not defined by the 3rd generation partnership project (the 3rd generation partnership project, 3GPP)).

In the scenario shown in FIG. 3 , after obtaining the authorization information for the UE, the AN device may send an indication to the UE, so as to instruct the terminal device to detect resources of the reference signal. Wherein, the authorization information for the UE may indicate that the UE is allowed to access the relay device. The UE may detect the VMR reference signal according to the resources, and generate a measurement report including the signal quality of the VMR reference signal detected by the UE. After the UE sends the measurement report to the AN device, the AN device can connect the UE to the VMR according to the measurement report and authorization information for the UE.

From the example shown in Figure 3, it can be seen that the AN device accessed by the UE can access the UE to the VMR according to the measurement report of the reference signal of the VMR detected by the UE and the authorization information for the UE, so that the UE can successfully access the VMR. VMR.

The solutions provided by the present application will be described below in conjunction with the accompanying drawings. The embodiment of the present application also provides a communication method, which can be applied to the communication system shown in FIG. 1 . On the basis of the method shown in Figure 2A, this method introduces authorization information for the first relay device; in this method, the AN device accessed by the terminal device can The terminal device is connected to the first relay device according to the authorization information of the relay device and the measurement result. Referring to the flow chart shown in FIG. 4 , the flow of the method will be described in detail. For ease of distinction and description, the AN device accessed by the terminal device is referred to as the first AN device, and the AN device accessed by the first relay device is referred to as the second AN device.

S401: The first AN device acquires authorization information for the terminal device. The authorization information for the terminal device may indicate that the terminal device is allowed to access the relay device.

For the specific content of this step, reference may be made to S201, which will not be repeated here.

S402: The first AN device acquires authorization information for the first relay device. The authorization information for the first relay device may indicate that the first relay device is allowed to provide the relay service.

In some possible implementation manners, the first AN device may acquire authorization information for the first relay device in a registration process of the first relay device. For example, the first AN device may acquire authorization information for the first relay device after receiving the registration request from the first relay device. Wherein, the registration request is used to request to register the first relay device in the mobile communication system where the first AN device is located.

In some possible implementation manners, the first AN device may acquire authorization information for the first relay device after determining that the first relay device is capable of providing the relay service.

Optionally, the first AN device may acquire authorization information for the first relay device after receiving the third capability information from the first relay device. The third capability information may indicate that the first relay device has a capability of providing a relay service.

The first AN device may acquire the third capability information through but not limited to the following ways:

Mode 1: When the first AN device is an AN device accessed by the first relay device, the first AN device may receive third capability information from the first relay device. Wherein, the third capability information may be carried in an existing message (for example, a registration request), or may be carried in a dedicated message for carrying the capability information.

Method 2: When the second AN device is an AN device accessed by the first relay device, the second AN device sends the third capability information to the first AN device after receiving the third capability information from the first relay device information. Wherein, the second AN device may send the third capability information to the first AN device through an interface between AN devices (for example, an X2 interface or an Xn interface); or, the second AN device may also send the third capability information to the first AN device through a core network device. An AN device sends third capability information.

Optionally, after receiving the fourth capability information from the first relay device, the first AN device may determine whether the first relay device is capable of providing relay services according to the fourth capability information. When the relay device is capable of providing the relay service, the first AN device acquires authorization information for the first relay device.

Wherein, the fourth capability information may be information capable of indirectly determining whether the first relay device has a capability of providing a relay service. For example, the fourth capability information may indicate the capability that the relay device can only have when providing the relay service. In this way, the first AN device may determine, according to the fourth capability information, that the first relay device has the capability of providing the relay service.

The first AN device may acquire the fourth capability information through but not limited to the following ways:

Manner 1: When the first AN device is an AN device accessed by the first relay device, the first AN device may receive fourth capability information from the first relay device. Wherein, the fourth capability information may be carried in an existing message (for example, a registration request), or may be carried in a dedicated message for carrying the capability information.

Mode 2: When the second AN device is an AN device accessed by the first relay device, after receiving the fourth capability information from the first relay device, the second AN device sends the fourth capability information to the first AN device information. Wherein, the second AN device may send the fourth capability information to the first AN device through an interface between AN devices (for example, an X2 interface or an Xn interface); or, the second AN device may also send the fourth capability information to the first AN device through a core network device. An AN device sends fourth capability information.

Through this implementation, the first AN device acquires the authorization information for the first relay device only when it is determined that the first relay device has the capability of providing the relay service. In this way, the first AN device does not need to acquire the authorization information of the relay device that does not have the capability of providing the relay service, thereby saving signaling overhead and saving transmission resources.

In this embodiment of the present application, the first AN device may acquire authorization information for the first relay device through, but not limited to, the following manners.

Implementation manner 1: the first AN device may receive authorization information for the first relay device from the AMF. Correspondingly, the AMF sends authorization information for the first relay device to the first AN device.

Optionally, when the first AN device and the second AN device are the same AN device, the first AN device may receive the authorization information for the first relay device. For example, after receiving the registration request of the first relay device, the first AN device requests the authorization information for the first relay device from the AMF, and receives the authorization information for the first relay device from the AMF.

Implementation manner 2: the first AN device may receive authorization information for the first relay device from the second AN device.

For example, when the first AN device and the second AN device are not the same AN device, the second AN device may request the AMF to register the first relay device with the mobile communication system where the second AN device is located Authorization information of a relay device, and sending authorization information for the first relay device to a neighboring AN device (for example, the first AN device).

Optionally, the second AN device may send authorization information for the first relay device to the first AN device through an interface between AN devices (for example, an X2 interface or an Xn interface).

Optionally, the second AN device may also send authorization information for the first relay device to the first AN device through a control plane network element. Specifically, the second AN device may send authorization information for the first relay device to a control plane network element, and the control plane network element sends authorization information for the first relay device to the first AN device.

Optionally, the authorization information for the first relay device may be carried in existing information (for example, subscription information or policy information), or may be carried in a new information element.

In some possible implementation manners, the authorization information for the first relay device may include indication information of the first relay device (for example, the ID of the first relay device). For example, when the third field corresponding to the authorization information for the first relay device in the subscription information or the policy information includes the ID of the first relay device, it means that the first relay device is allowed to provide the relay service.

In some other possible implementation manners, when the information including the authorization information for the first relay device includes the indication information of the first relay device, and the fourth field of the authorization information for the first relay device is the second When it is a value, it means that the first relay device is allowed to provide relay service.

In addition, the authorization information for the first relay device may also indicate conditions that the first relay device should meet when providing the relay service. For example, the authorization information for the first relay device includes the conditions that the first relay device should meet when providing the relay service. For another example, the authorization information for the first relay device includes information used to indicate conditions that the first relay device should meet when providing the relay service. For another example, the authorization information for the first relay device includes third information used to determine the conditions that the first relay device should meet when providing the relay service. At this time, when the first relay device provides the relay service, it should The satisfied condition may be determined according to the third information and the fourth information, an example is: the third information is a serial number, and the fourth information is the correspondence between the serial number and the conditions that should be satisfied when the first relay device provides the relay service relationship, the first AN device can determine the conditions that should be met when the first relay device provides the relay service according to the received serial number and the corresponding relationship.

For example, the location information of the first relay device when the first relay device provides the relay service may be: geographic location information or a set of geographic location information of the first relay device when the first relay device provides the relay service.

For another example, the path information of the first relay device when the first relay device provides the relay service may be: the moving path information of the first relay device when the first relay device provides the relay service.

For another example, when the first relay device provides the relay service, the area information of the first relay device may include at least one of the following: one or more AN device identifiers, one or more cell identifiers, and one or more TAIs. When the area information includes one or more AN device identifiers, the first relay device is allowed to provide the relay service within the coverage of the AN device indicated by the one or more AN device identifiers. When the area information includes one or more cell identifiers, the first relay device is allowed to provide the relay service in the cells indicated by the one or more cell identifiers. When the area information includes one or more TAIs, the first relay device is allowed to provide the relay service within the area indicated by the one or more TAIs.

For another example, the time information for the first relay device to provide the relay service may be a time set or a time range. The time information for the first relay device to provide the relay service may indicate an absolute time, or may be an offset relative to a reference time.

For another example, the terminal device information allowed to access the first relay device may be indication information of terminal devices allowed to access the first relay device (for example, an identification list of terminal devices allowed to access the first relay device).

Through this method, the first AN device can determine the time and place when the first relay device can provide the relay service according to the conditions that the first relay device should meet when providing the relay service, so as to effectively control the terminal device to receive into the first relay device.

S403: The first AN device sends an indication to the terminal device, so as to instruct the terminal device to detect resources of the reference signal. Correspondingly, the terminal device receives the instruction from the AN device.

For the specific content of this step, reference may be made to S202, which will not be repeated here.

S404: The terminal device detects the reference signal on the resource, and generates a measurement report.

For the specific content of this step, reference may be made to S203, which will not be repeated here.

S405: The terminal device sends a measurement report to the first AN device. Correspondingly, the first AN device receives the measurement report from the terminal device.

For the specific content of this step, reference may be made to S204, which will not be repeated here.

S406: The first AN device connects the terminal device to the first relay device according to the authorization information for the terminal device, the authorization information for the first relay device, and the measurement result.

The specific content of this step can refer to S205, and only the difference from S205 will be described below.

In some possible implementation manners, when the terminal device meets the conditions indicated by the authorization information for the terminal device that should be met when the terminal device accesses the relay device, and the first relay device satisfies the authorization information for the first relay device When the indicated condition that the first relay device should meet when providing the relay service, the first AN device may connect the terminal device to the first relay device according to the signal quality indicated by the measurement result.

For example, when the terminal device satisfies the conditions that should be met when the terminal device accesses the relay device indicated by the authorization information for the terminal device, and the first relay device satisfies the first relay device indicated by the authorization information for the first relay device. When the conditions that the relay device should meet when providing the relay service, the first AN device can select the relay device with the best signal quality according to the measurement results, that is, the first relay device; then connect the terminal device to the first relay device .

For another example, when the terminal device satisfies the conditions that should be met when the terminal device accesses the relay device indicated by the authorization information for the terminal device, and the first relay device meets the first relay device indicated by the authorization information for the first relay device. When the relay device provides the relay service, the first AN device can select the relay device whose signal quality exceeds the first threshold according to the measurement result, that is, the first relay device; and then connect the terminal device to the first relay device. relay device. Optionally, when the relay devices whose signal quality exceeds the first threshold include multiple relay devices, the first AN device may randomly select a relay device from the multiple relay devices, that is, the first relay device, or , select a relay device with the smallest load from the multiple relay devices, that is, the first relay device.

The embodiment of the present application provides a communication method. In this solution, the AN device accessed by the terminal device can notify the terminal device of the resource of the detection reference signal after learning that the terminal device is allowed to access the relay device, and according to the terminal device's The measurement result of the reference signal of the first relay device detected on the resource, the authorization information for the terminal device, and the authorization information for the first relay device, and the terminal device is connected to the first relay device, so that the terminal The device is successfully connected to the first relay device.

The solutions provided by the present application will be described below in conjunction with the accompanying drawings. The embodiment of the present application also provides a communication method, which can be applied to the communication system shown in FIG. 1 . Referring to the flow chart shown in FIG. 5 , the flow of the method will be described in detail. For ease of distinction and description, the AN device accessed by the terminal device is referred to as the first AN device, and the AN device accessed by the first relay device is referred to as the second AN device.

S501: The AMF acquires authorization information for the terminal device. The authorization information for the terminal device may indicate that the terminal device is allowed to access the relay device.

For the specific content of the authorization information for the terminal device, reference may be made to S201, which will not be repeated here.

In some possible implementation manners, the AMF may acquire authorization information for the terminal device during a registration process of the terminal device. For example, the AMF may acquire authorization information for the terminal device after receiving a registration request from the terminal device or the first AN device. Wherein, the registration request is used to request to register the terminal device in the mobile communication system where the AMF is located.

In some possible implementation manners, the AMF may acquire authorization information for the terminal device after determining that the terminal device has the capability of accessing the relay device.

Optionally, the AMF may obtain authorization information for the terminal device after obtaining the first capability information of the terminal device. Wherein, the first capability information may indicate that the terminal device has the capability of accessing the relay device.

Optionally, after acquiring the second capability information of the terminal device, the AMF may determine whether the terminal device has the capability of accessing the relay device according to the second capability information; when determining that the terminal device has the capability of accessing the relay device , the AMF can acquire authorization information for the terminal device.

Wherein, the second capability information may be information capable of indirectly determining that the terminal device has a capability of accessing the relay device. For example, the second capability information may be a capability that the terminal device can only have when accessing the relay device. Exemplarily, the second capability information may indicate that the terminal device has a UE cooperation capability. Therefore, when the second capability information indicates that the terminal device has the capability of UE cooperation, the AMF may determine that the terminal device has the capability of accessing the relay device.

The first capability information and the second capability information may be carried in an existing message (for example, a registration request), or may be carried in a dedicated message for carrying capability information.

The AMF may receive the first capability information and/or the second capability information from the terminal device through the first AN device.

Through this implementation mode, when the terminal device has the ability to access the relay device, the AMF obtains the authorization information for the terminal device, and the AMF does not need to obtain the authorization information of the terminal device that does not have the ability to access the relay device, thereby saving Signaling overhead saves transmission resources.

In the embodiment of the present application, the AMF may acquire authorization information for the terminal device through but not limited to the following ways.

Method 1:

AMF can receive subscription information for terminal equipment from UDM or UDR. The subscription information for the terminal device may include authorization information for the terminal device.

For example, after receiving the registration request from the terminal device or the first AN device, the AMF may acquire the subscription information for the terminal device by initiating a subscription information acquisition (Nudm_SDM_get) procedure to the UDM. Wherein, the registration request from the terminal device or the first AN device is used to request to register the terminal device in the mobile communication system where the AMF is located. In this process, the UDM may send the locally stored subscription information for the terminal device or the subscription information for the terminal device obtained from the UDR to the AMF.

Method 2:

The AMF can receive policy information for terminal equipment from the PCF. The policy information for the terminal device may include authorization information for the terminal device.

For example, after receiving the registration request from the terminal device or the first AN device, the AMF may initiate a policy acquisition process (for example, a policy management establishment/modification process) to the PCF. In this process, the PCF can send the policy information for the terminal device to the AMF. Wherein, the registration request from the terminal device or the first AN device is used to request to register the terminal device in the mobile communication system where the AMF is located.

For another example, after the PCF receives the authorization update request for updating the authorization information for the terminal device, it may send the policy information for the terminal device to the AMF, where the policy information for the terminal device includes the updated authorization information for the terminal device .

S502: The AMF allows the terminal device to access the relay device when determining that the terminal device accesses the first AN device according to the authorization information for the terminal device.

Optionally, the AMF may determine whether the terminal device is allowed to access the relay device when the terminal device accesses the first AN device according to the conditions indicated by the authorization information for the terminal device that the terminal device should meet when accessing the relay device . When the judgment result is yes, execute S503; otherwise, the AMF does not send authorization information for the terminal device to the first AN device.

For example, when the conditions to be met when the terminal device accesses the relay device include the location information of the terminal device when the terminal device accesses the relay device, if the coverage of the first AN device includes the location indicated by the location information, the AMF can determine When the terminal device is accessing the first AN device, the terminal device is allowed to access the relay device; otherwise, the AMF determines that when the terminal device is accessing the first AN device, the terminal device is not allowed to access the relay device.

For another example, when the conditions to be satisfied when the terminal device accesses the relay device include the area information of the terminal device when the terminal device accesses the relay device, if the coverage of the first AN device includes the area indicated by the area information, or the first If the coverage of the AN device overlaps with the area indicated by the area information, the AMF can determine that when the terminal device is accessing the first AN device, the terminal device is allowed to access the relay device; otherwise, the AMF determines that when the terminal device is accessing the first AN device When using AN equipment, the terminal equipment is not allowed to access the relay equipment.

For another example, the conditions that should be met when the terminal device accesses the relay device include: when the terminal device accesses the relay device, the location information of the terminal device and the time information when the terminal device accesses the relay device, if the first AN device's The coverage includes the location indicated by the location information, and the current time belongs to the time indicated by the time information of the terminal device accessing the relay device, then the AMF can determine that when the terminal device is accessing the first AN device, the terminal device is allowed to access the relay device Otherwise, the AMF may determine that the terminal device is not allowed to access the relay device when the terminal device is accessing the first AN device.

S503: The AMF sends authorization information for the terminal device to the first AN device. Correspondingly, the first AN device receives authorization information for the terminal device from the AMF.

For the specific content of S503, reference may be made to S201, which will not be repeated here.

Optionally, after receiving the authorization information for the terminal device, the first AN device may execute S202-S205, which will not be repeated here.

S504: The AMF acquires authorization information for the first relay device. The authorization information for the first relay device may indicate that the first relay device is allowed to provide the relay service.

For the specific content of the authorization information for the first relay device, reference may be made to S402, which will not be repeated here.

In some possible implementation manners, the AMF may acquire authorization information for the first relay device during a registration process of the first relay device. For example, the AMF may acquire authorization information for the first relay device after receiving a registration request from the first relay device or the second AN device. Wherein, the registration request from the first relay device or the second AN device is used to request to register the first relay device in the mobile communication system where the AMF is located.

In some possible implementation manners, the AMF may acquire authorization information for the first relay device after determining that the first relay device is capable of providing the relay service.

Optionally, the AMF may obtain authorization information for the first relay device after obtaining the third capability information of the first relay device. Wherein, the third capability information may indicate that the first relay device has a capability of providing a relay service.

Optionally, after obtaining the fourth capability information of the first relay device, the AMF may determine whether the first relay device is capable of providing relay services according to the fourth capability information; when determining that the first relay device has the capability to provide When relaying the capability of the service, the AMF may acquire authorization information for the first relay device.

Wherein, the fourth capability information may be information capable of indirectly determining that the first relay device has a capability of providing a relay service. For example, the fourth capability information may indicate the capability that the relay device can only have when providing the relay service. In this way, the AMF may determine, according to the fourth capability information, that the first relay device has the capability of providing the relay service.

The third capability information and the fourth capability information may be carried in an existing message (for example, a registration request), or may be carried in a dedicated message for carrying capability information.

The AMF may receive the third capability information and/or the fourth capability information from the first relay device through the second AN device.

Through this implementation, when the first relay device has the ability to provide relay services, the AMF obtains the authorization information for the first relay device, and the AMF does not need to obtain the authorization of the relay device that does not have the capability to provide relay services information, which can save signaling overhead and save transmission resources.

In this embodiment of the present application, the AMF may obtain the authorization information for the first relay device through but not limited to the following manners.

method one:

The AMF may receive subscription information for the first relay device from the UDM or UDR, where the subscription information for the first relay device includes authorization information for the first relay device.

For example, after receiving the registration request from the first relay device or the second AN device, the AMF may acquire the subscription information for the first relay device by initiating a subscription information acquisition process to the UDM. Wherein, the registration request from the first relay device or the second AN device is used to request to register the first relay device in the mobile communication system where the AMF is located. In this process, the UDM may send the locally stored subscription information for the first relay device or the subscription information for the first relay device acquired from the UDR to the AMF.

Method 2:

The AMF may receive policy information for the first relay device from the PCF, where the policy information for the first relay device includes authorization information for the first relay device.

For example, after receiving the registration request from the first relay device or the second AN device, the AMF may initiate a policy acquisition process to the PCF. In this process, the PCF may send the policy information for the first relay device to the AMF. Wherein, the registration request from the first relay device or the second AN device is used to request to register the first relay device in the mobile communication system where the AMF is located.

For another example, after receiving the authorization update request for updating the authorization information for the first relay device, the PCF may send the policy information for the first relay device to the AMF. Wherein, the policy information for the first relay device includes updated authorization information for the first relay device.

S505: The AMF determines, according to the authorization information for the first relay device, that the first relay device is allowed to provide a relay service when the first relay device accesses the second AN device.

Optionally, the AMF may determine whether the first relay device, when accessing the second AN device, is The first relay device is allowed to provide the relay service. When the judgment result is yes, execute S506; otherwise, the AMF does not send authorization information for the first relay device to the second AN device.

For example, when the conditions to be satisfied when the first relay device provides the relay service include the location information of the first relay device when the first relay device provides the relay service, if the coverage of the second AN device includes the location information indication location, the AMF can determine that when the first relay device is accessing the second AN device, the first relay device is allowed to provide relay services; otherwise, the AMF determines that when the first relay device is accessing the second AN device When , the first relay device is not allowed to provide the relay service.

For another example, when the conditions to be satisfied when the first relay device provides the relay service include the area information of the first relay device when the first relay device provides the relay service, if the coverage of the second AN device includes the area information Indicated area, or the coverage of the second AN device overlaps with the area indicated by the area information, then the AMF may determine that when the first relay device is accessing the second AN device, the first relay device is allowed to provide relay services; Otherwise, the AMF determines that when the first relay device is accessing the second AN device, the first relay device is not allowed to provide the relay service.

For another example, the conditions that should be met when the first relay device provides the relay service include: the location information of the first relay device when the first relay device provides the relay service and the time when the first relay device provides the relay service information, if the coverage of the second AN device includes the location indicated by the location information, and the current time belongs to the time indicated by the time information of the first relay device providing relay services, the AMF can determine that when the first relay device is receiving When accessing the second AN device, the first relay device is allowed to provide the relay service; otherwise, the AMF may determine that when the first relay device is accessing the second AN device, the first relay device is not allowed to provide the relay service.

For another example, when the conditions that the first relay device should satisfy when providing the relay service include the path information of the first relay device when the first relay device provides the relay service, if the coverage of the second AN device includes the path information indicated path, or the coverage of the second AN device overlaps with the path indicated by the path information, the AMF may determine that when the first relay device is accessing the second AN device, the first relay device is allowed to provide the relay service; Otherwise, the AMF determines that when the first relay device is accessing the second AN device, the first relay device is not allowed to provide the relay service.

S506: The AMF sends authorization information for the first relay device to the second AN device. Correspondingly, the second AN device receives authorization information for the first relay device from the AMF.

For the specific content of S506, reference may be made to S402, which will not be repeated here.

In some possible implementations, when the first AN device and the second AN device are the same AN device, the AMF may refer to the implementation 1 in S402 to send the authorization information for the first relay device to the second AN device .

In some other possible implementations, when the first AN device and the second AN device are not the same AN device, the AMF may refer to the implementation 1 in S402 to send the authorization for the first relay device to the second AN device information, the second AN device may refer to Implementation Mode 2 in S402 to send authorization information for the first relay device to the first AN device.

Optionally, after the first AN device obtains the authorization information for the terminal device and the authorization information for the first relay device through the above implementation manner, it can execute S403-S406, which will not be repeated here.

It should be understood that, in the embodiment of the present application, only S501-S503 may be executed, or only S504-S506 may be executed.

The embodiment of the present application provides a communication method. In this solution, the AMF sends a permission indication to the first AN device only when it determines that the terminal device is allowed to access the first AN device and allows the terminal device to access the relay device. Authorization information for the terminal device for the terminal device to access the relay device; it is sent to the second AN device only when it is determined that the first relay device is allowed to provide the relay service when the first relay device accesses the second AN device Authorization information for the first relay device that allows the first relay device to provide the relay service may be indicated, so that transmission of unnecessary authorization information may be avoided, and signaling overhead and transmission resources may be saved.

The embodiment of the present application also provides a communication method, which can be applied to the communication system shown in FIG. 1 . In this method, the UDM may generate authorization information for the first relay device according to the authorization request from the AF, and send the authorization information for the first relay device to the AMF and the AN device accessed by the first relay device. Through this method, the AN device accessed by the first relay device in the method shown in Figure 4 can obtain the authorization information for the first relay device from the UDM, and the AMF in the method shown in Figure 5 can obtain the authorization information for the first relay device from the UDM. Authorization information of the first relay device. Referring to the flow chart shown in FIG. 6 , the flow of the method will be described in detail. The present application will be described below by taking the relay device as the VMR and the terminal device as the UE as an example.

S601: The AF sends an authorization request of the VMR to the NEF. Correspondingly, the NEF receives the authorization request from the VMR of the AF.

Optionally, the AF may be an application server (application server, AS). After receiving the request from the VMR to authorize the VMR to provide the VMR service, the AS may send the VMR authorization request to the NEF. For example, the VMR sends a request to the AS for authorizing the VMR to provide the VMR service through an application corresponding to the AS; then, the AS may send an authorization request of the VMR to the NEF.

The authorization request may include the identification of the VMR. The authorization request may request the core network device to authorize the VMR to provide the VMR service. For example, the authorization request may request the core network device to authorize the VMR as a relay to provide access services for UEs within the coverage of the VMR.

Optionally, the authorization request may also include conditions that should be met when the VMR provides the VMR service. For the specific content of the conditions that the VMR should meet when providing the VMR service, refer to S402, where the first relay device may be the VMR, which will not be repeated here.

Wherein, the VMR may be a UE, or may be an integrated access and backhaul (IAB) node (for example, an IAB host node DU).

S602: The NEF sends the authorization request of the VMR to the UDM. Correspondingly, UDM receives authorization request from NEF.

Optionally, when the conditions that the VMR should meet when providing the VMR service include location-related information, the NEF can convert the location-related information included in the conditions that the VMR should meet when the VMR provides the VMR service into location information that can be recognized by the core network device (for example, at least one of TAI, cell ID, and base station ID), send an authorization request including the conditions that the VMR should meet when providing the VMR service to the UDM. The location-related information may include at least one item: location information of the VMR when the VMR provides relay services, path information of the VMR when the VMR provides relay services, and area information of the VMR when the VMR provides relay services.

S603: The UDM authorizes the VMR according to the authorization request, and generates subscription information for the VMR. The subscription information for the VMR may include authorization information for the VMR. The authorization information for the VMR may indicate that the VMR is allowed to provide the VMR service.

For specific content of the authorization information for the VMR, reference may be made to S402, where the first relay device may be a VMR, which will not be repeated here.

The UDM may authorize the VMR to provide the VMR service according to the identification of the VMR in the authorization request.

In addition, the UDM may store the subscription information for the VMR locally, or may store the subscription information for the VMR in the UDR.

S604: The VMR sends a message to the AMF. Correspondingly, the AMF receives the message from the VMR.

Optionally, the message may be a registration request or a service request (for example, a session establishment request).

The VMR may send the message to the AMF through the AN device accessed by the VMR.

In addition, the message may include: capability information of the VMR. The capability information of the VMR may indicate that the VMR has the capability of providing the VMR service.

S605: The AMF acquires the subscription information for the VMR. Wherein, the subscription information for the VMR may include authorization information for the VMR.

The AMF may receive the subscription information for the VMR from the UDM by initiating a subscription information acquisition process to the UDM, and obtain authorization information for the VMR in the subscription information for the VMR.

For the specific content of S605, reference may be made to S504, which will not be repeated here.

S606: The AMF sends authorization information for the VMR to the AN device accessed by the VMR.

For the specific content of S606, reference may be made to S506, which will not be repeated here.

In some possible implementation manners, before sending the authorization information for the VMR, the AMF may judge whether to allow the VMR to provide the VMR service when the VMR accesses the AN device according to the conditions that the VMR should meet when providing the VMR service. When the judgment result is yes, the AMF sends the authorization information for the VMR to the AN device; otherwise, the AMF does not send the authorization information for the VMR to the AN device. For the specific content of the determination, reference may be made to S505, which will not be repeated here.

Optionally, when the conditions that the VMR should meet when providing the VMR service include UE information that is allowed to access the VMR, the AMF can record the UE information in the context of the VMR, or include the UE information in the VMR that should provide the VMR service. If the condition is met, it is sent to the AN device. In this way, the AN device can verify the UE's access to the VMR according to the conditions that the VMR should meet when providing the VMR service, for example, determine whether the UE can access the VMR.

S607: The AMF sends authorization information for the VMR to the VMR.

Optionally, the AMF may send a registration acceptance message to the VMR. The registration acceptance message includes subscription information for the VMR, and the subscription information for the VMR includes authorization information for the VMR.

In some possible implementation manners, the authorization request sent by the AF to the NEF may be replaced with an authorization update request, and the content of the authorization update request may be the same as that of the authorization request, which will not be repeated here. When the authorization request in S601 is replaced with an authorization update request, the authorization request in subsequent steps is also replaced with an authorization update request.

The authorization update request may be used to request the core network device to update the authorization of the VMR. For example, when the VMR is not allowed to provide the VMR service, the authorization update request may request the core network device to authorize the VMR to provide the VMR service. For another example, when the VMR is allowed to provide the VMR service within the first time range, the authorization update request may request the core network device to authorize the VMR to provide the VMR service within the second time range.

Optionally, when updating the authorization for the VMR, the UDM may update the subscription information for the VMR and the authorization information for the VMR.

In some possible implementation manners, the AF may directly send the authorization request to the UDM without being forwarded by the NEF. In this case, S601 and S602 are combined into one step: the AF sends the authorization request to the UDM.

In some possible implementation manners, the above UDM may be replaced by UDR.

In some possible implementation manners, the method may not include S601 and S602. In S603, the UDM may generate subscription information including the authorization information for the VMR according to the operator's management of the authorization of the VMR. For example, when a user requests the operator to authorize the VMR to provide the VMR service, the operator may trigger the UDM to generate subscription information including the authorization information for the VMR.

Through this method, the AF can initiate the authorization of the VMR, so that the VMR and the AN device accessed by the VMR obtain authorization information for the VMR that can indicate that the VMR is allowed to provide the VMR service. In this way, the AN device can access the UE to the VMR according to the authorization information for the VMR.

The embodiment of the present application also provides a communication method, which can be applied to the communication system shown in FIG. 1 . In this method, the PCF can generate policy information containing authorization information for the first relay device according to the authorization request from the AF, and send a request for the second relay device to the AMF and the AN device accessed by the first relay device through the policy information. Authorization information of a relay device. Through this method, the AN device accessed by the first relay device in the method shown in Figure 4 can obtain the authorization information for the first relay device from the PCF, and the AMF in the method shown in Figure 5 can obtain the authorization information for the first relay device from the PCF. Authorization information of the first relay device. Referring to the flow chart shown in FIG. 7 , the flow of the method will be described in detail. The present application will be described below by taking the relay device as the VMR and the terminal device as the UE as an example.

S701: The AF sends an authorization request of the VMR to the NEF. Correspondingly, the NEF receives the authorization request from the VMR of the AF.

For the specific content of S701, reference may be made to S601, which will not be repeated here.

S702: The NEF sends the authorization request of the VMR to the PCF. Correspondingly, the PCF receives the authorization request from the NEF.

For the specific content of S702, refer to S602, except that the UDM is replaced with PCF, which will not be repeated here.

S703: The PCF generates policy information for the VMR, where the policy information for the VMR may include authorization information for the VMR.

For the content of the authorization information for the VMR, reference may be made to S402, where the first relay device may be a VMR, which will not be repeated here.

Optionally, the policy information for the VMR may be user equipment policy (UE policy) information, or access management policy (AM policy) information.

S704: The VMR sends a message to the AMF. Correspondingly, the AMF receives the message from the VMR.

Wherein, the message may be a non-access-stratum (non-access-stratum, NAS) message requesting a user policy of the VMR, or may be a registration request.

Optionally, the message may include: capability information of the VMR. Wherein, the capability information of the VMR may indicate that the VMR has the capability of providing the VMR service.

In some implementation manners, the capability information of the VMR may be included in a policy container (policy container) in the NAS message.

S705: The AMF acquires policy information for the VMR from the PCF. Wherein, the policy information for the VMR may include authorization information for the VMR.

In some possible implementation manners, when the capability information of the VMR is included in the policy container in the NAS message, the AMF may send the NAS message including the policy container to the PCF. According to the capability information of the VMR in the policy container, the PCF can obtain the user equipment policy information including the authorization information for the VMR from the UDR, and send the user equipment policy information to the AMF.

In some other possible implementation manners, when the AMF is capable of providing the VMR service at the VMR, the PCF is requested to send policy information for the VMR to the AMF.

In some other possible implementation manners, after the PCF generates the policy information for the VMR, it may send the policy information for the VMR to the AMF. In this case, the authorization request may trigger the PCF to send policy information for the VMR.

S706: The AMF sends authorization information for the VMR to the AN device accessed by the VMR.

For the specific content of S706, reference may be made to S606, and only the differences from S606 will be described below.

When the policy information for the VMR is access management policy information, the AMF can parse the policy information for the VMR. If the AMF determines that the access management policy information includes the authorization information for the VMR of the VMR, the AMF may send the authorization information for the VMR to the AN device accessed by the VMR.

S707: The AMF sends authorization information for the VMR to the VMR.

For the specific content of S707, reference may be made to S607, and only the differences from S607 will be described below.

Optionally, when the policy information for the VMR is user equipment policy information, the AMF transparently transmits the policy information for the VMR from the PCF to the VMR.

In some possible implementation manners, the AF may directly send the authorization request to the PCF without being forwarded by the NEF. In this case, S701 and S702 are combined into one step: the AF sends the authorization request to the PCF.

In some possible implementation manners, the authorization request sent by the AF to the NEF may be replaced with an authorization update request, and the content of the authorization update request may be the same as that of the authorization request, which will not be repeated here. When the authorization request in S701 is replaced with an authorization update request, the authorization request in subsequent steps is also replaced with an authorization update request.

In some possible implementation manners, the method may not include S701 and S702. In S703, the PCF may generate policy information including authorization information for the VMR according to the operator's management of the authorization of the VMR. For example, when a user requests the operator to authorize the VMR to provide the VMR service, the operator may trigger the PCF to generate policy information including authorization information for the VMR.

Through this method, the AF can initiate the authorization of the VMR, so that the VMR and the AN device accessed by the VMR obtain from the PCF the authorization information for the VMR that can indicate that the VMR is allowed to provide the VMR service. In this way, the AN device can access the UE to the VMR according to the authorization information for the VMR.

The embodiment of the present application also provides a communication method, which can be applied to the communication system shown in FIG. 1 . In this method, the UDM can generate authorization information for the terminal device according to the authorization request from the AF, and send the authorization information for the terminal device to the AMF and the AN device accessed by the terminal device. Through this method, the AN device accessed by the terminal device in the methods shown in Figure 2A and Figure 4 can obtain the authorization information for the terminal device from the UDM, and the AMF in the method shown in Figure 5 can obtain the authorization information for the terminal device from the UDM. authorization information. Referring to the flow chart shown in FIG. 8 , the flow of the method will be described in detail. The present application will be described below by taking the relay device as the VMR and the terminal device as the UE as an example.

S801: The AF sends the authorization request of the UE to the NEF. Correspondingly, the NEF receives the authorization request from the UE of the AF.

Optionally, AF may be AS. After receiving the request from the UE for authorizing the UE to access the VMR, the AS may send the UE's authorization request to the NEF. For example, the UE sends a request for authorizing the UE to access the VMR to the AS through an application corresponding to the AS; then, the AS may send the UE's authorization request to the NEF.

The authorization request may include the identity of the UE. The authorization request may request the core network device to authorize the UE to access the VMR. For example, the authorization request may request the core network device to authorize the UE to use the VMR service and access the AN device through the VMR.

Optionally, the authorization request may also include conditions that the UE should meet when accessing the VMR. For the specific content of the conditions that should be met when the UE can access the VMR, please refer to S201.

The authorization request may include the content of the authorization information for the terminal device in S201, which will not be repeated here.

S802: The NEF sends the UE's authorization request to the UDM. Correspondingly, UDM receives authorization request from NEF.

Optionally, when the conditions that the UE should meet when accessing the VMR include location-related information, the NEF can convert the location-related information included in the conditions that the UE should meet when accessing the VMR into location information that can be recognized by core network devices (for example, at least one of TAI, cell identity, and base station identity), send an authorization request including the conditions that the UE should satisfy when accessing the VMR to the UDM. The location-related information may include at least one item: location information of the UE when the UE accesses the VMR, and area information of the UE when the UE accesses the VMR.

S803: The UDM authorizes the UE according to the authorization request, and generates subscription information for the UE. Wherein, the subscription information for the UE may include authorization information for the UE. The authorization information for the UE may indicate that the UE is allowed to access the VMR.

For the specific content of the authorization information for the UE, reference may be made to S201, which will not be repeated here.

The UDM may authorize the UE to access the VMR according to the identifier of the UE in the authorization request.

In addition, the UDM may store the subscription information for the UE locally, or store the subscription information for the UE in the UDR.

S804: The UE sends a message to the AMF. Correspondingly, the AMF receives the message from the UE.

The UE can send a message to the AMF through the AN device accessed by the UE.

In addition, the message may include: capability information of the UE. The capability information of the UE may indicate that the UE has the capability of accessing the VMR.

S805: The AMF acquires subscription information for the UE. Wherein, the subscription information for the UE may include authorization information for the UE.

The AMF may receive the subscription information for the UE from the UDM by initiating a subscription information acquisition process to the UDM, and obtain authorization information for the UE in the subscription information for the UE.

For the specific content of S805, reference may be made to S501, which will not be repeated here.

S806: The AMF sends authorization information for the UE to the AN device accessed by the UE.

For the specific content of S806, reference may be made to S503, which will not be repeated here.

In some possible implementation manners, before sending the authorization information for the UE, the AMF may judge whether to allow the UE to access the VMR when the UE accesses the AN device according to the conditions that the UE should meet when accessing the VMR. When the judging result is yes, the AMF sends the authorization information for the UE to the AN device; otherwise, the AMF does not send the authorization information for the UE to the AN device. For the specific content of the judgment, reference may be made to S502, which will not be repeated here.

Optionally, when the conditions that the UE should meet when accessing the VMR include the VMR information that the UE is allowed to access, the AMF can record the VMR information in the context of the UE, or include the VMR information in the If the condition is met, send it to the AN device. In this way, the AN device can verify the UE's access to the VMR according to the conditions that the UE should meet when accessing the VMR, for example, determine whether the UE can access the VMR.

S807: The AMF sends authorization information for the UE to the UE.

Optionally, the AMF may send a registration acceptance message to the UE. The registration acceptance message includes subscription information for the UE, and the subscription information for the UE includes authorization information for the UE.

In some possible implementation manners, the authorization request sent by the AF to the NEF may be replaced with an authorization update request, and the content of the authorization update request may be the same as that of the authorization request, which will not be repeated here. When the authorization request in S801 is replaced with an authorization update request, the authorization request in subsequent steps is also replaced with an authorization update request.

Optionally, when updating the authorization for the UE, the UDM may update the subscription information for the UE and the authorization information for the UE.

In some possible implementation manners, the AF may directly send the authorization request to the UDM without being forwarded by the NEF. In this case, S801 and S802 are combined into one step: the AF sends the authorization request to the UDM.

In some possible implementation manners, the above UDM may be replaced by UDR.

In some possible implementation manners, the method may not include S801 and S802. In S803, the UDM may generate subscription information including authorization information for the UE according to the operator's management of the authorization of the UE. For example, when a user requests the operator to authorize the UE to access the VMR, the operator may trigger the UDM to generate subscription information including authorization information for the UE.

Through this method, the AF can initiate authorization for the UE, so that the UE and the AN device accessed by the UE obtain authorization information for the UE that can indicate that the UE is allowed to access the VMR. In this way, the AN device can access the UE to the VMR according to the authorization information for the UE.

The embodiment of the present application also provides a communication method, which can be applied to the communication system shown in FIG. 1 . In this method, the PCF can generate policy information including authorization information for the UE according to the authorization request from the AF, and send the authorization information for the terminal device to the AMF and the AN device accessed by the terminal device. Through this method, the AN device accessed by the terminal device in the methods shown in Figure 2A and Figure 4 can obtain the authorization information for the terminal device from the PCF, and the AMF in the method shown in Figure 5 can obtain the authorization information for the terminal device from the PCF. authorization information. Referring to the flow chart shown in FIG. 9 , the flow of the method will be described in detail. The present application will be described below by taking the relay device as the VMR and the terminal device as the UE as an example.

S901: The AF sends the authorization request of the UE to the NEF. Correspondingly, the NEF receives the authorization request from the UE of the AF.

For the specific content of S901, reference may be made to S801, which will not be repeated here.

S902: The NEF sends the UE's authorization request to the PCF. Correspondingly, the PCF receives the authorization request from the NEF.

For the specific content of S902, refer to S802, except that the UDM is replaced with PCF, which will not be repeated here.

S903: The PCF generates policy information for the UE. Wherein, the policy information for the UE may include authorization information for the UE.

For the content of the authorization information for the UE, reference may be made to S201, which will not be repeated here.

Optionally, the policy information for the UE may be user equipment policy (UE policy) information, or access management policy (AM policy) information.

S904: The UE sends a message to the AMF. Correspondingly, the AMF receives the message from the UE.

Wherein, the message may be a NAS message requesting a user policy of the UE, or a registration request.

Optionally, the message may include: capability information of the UE. Wherein, the capability information of the UE may indicate that the UE has the capability of accessing the VMR.

In some possible implementation manners, the capability information of the UE may be included in the policy container in the NAS message.

S905: The AMF acquires policy information for the UE from the PCF. Wherein, the policy information for the UE may include authorization information for the UE.

In some possible implementation manners, when the capability information of the UE is included in the policy container in the NAS message, the AMF may send the NAS message including the policy container to the PCF. The PCF may acquire user equipment policy information including authorization information for the UE from the UDR according to the UE capability information in the policy container, and send the user equipment policy information to the AMF.

In some other possible implementation manners, when the UE has the capability of accessing the VMR, the AMF requests the PCF to send policy information for the UE to the AMF.

In some other possible implementation manners, after the PCF generates the policy information for the UE, it may send the policy information for the UE to the AMF. In this case, the authorization request may trigger the PCF to send policy information for the UE.

S906: The AMF sends authorization information for the UE to the AN device.

For the specific content of S906, reference may be made to S806, and only the differences from S806 will be described below.

When the policy information for the UE is access management policy information, the AMF can parse the policy information for the UE. If the AMF determines that the access management policy information includes the authorization information for the UE, the AMF may send the authorization information for the UE to the AN device.

S907: The AMF sends authorization information for the UE to the UE.

For the specific content of S907, reference may be made to S807, and only the differences from S807 will be described below.

Optionally, when the policy information for the UE is user equipment policy information, the AMF transparently transmits the policy information for the UE from the PCF to the UE.

In some possible implementation manners, the AF may directly send the authorization request to the PCF without being forwarded by the NEF. In this case, S901 and S902 are combined into one step: the AF sends the authorization request to the PCF.

In some possible implementation manners, the authorization request sent by the AF to the NEF may be replaced with an authorization update request, and the content of the authorization update request may be the same as that of the authorization request, which will not be repeated here. When the authorization request in S901 is replaced with an authorization update request, the authorization request in subsequent steps is also replaced with an authorization update request.

In some possible implementation manners, the method may not include S901 and S902. In S903, the PCF may generate policy information including authorization information for the UE according to the operator's management of the authorization of the UE. For example, when a user requests the operator to authorize the UE to access the VMR, the operator may trigger the PCF to generate policy information including authorization information for the UE.

The embodiment of the present application also provides a communication method, which can be applied to the communication system shown in FIG. 1 . This method shows the process of the terminal device accessing the first relay device when the AN device accessed by the first relay device and the AN device accessed by the terminal device are different AN devices. Referring to the flow chart shown in FIG. 10 , the flow of the method will be described in detail. Hereinafter, the embodiment of the present application will be described by taking the relay device as an example of a VMR. For ease of distinction and description, AN devices accessed by terminal devices are referred to as first AN devices, AN devices accessed by VMRs are referred to as second AN devices, and terminal devices are referred to as UEs. In this method, the target communication device includes: a first AN device, a second AN device, a first VMR and a UE.

S1001: The target communication device acquires authorization information.

The first AN device may obtain the authorization information for the UE, and the manner of obtaining may refer to S201, which will not be repeated here.

The second AN device may obtain the authorization information for the first VMR, and the manner of obtaining may refer to S506, which will not be repeated here.

The UE may acquire the authorization information for the UE. For the acquisition method, refer to the method shown in FIG. 8 or FIG. 9 , which will not be repeated here.

The first VMR may acquire the authorization information for the first VMR, and the acquisition method may refer to the method shown in FIG. 6 or FIG. 7 , which will not be repeated here.

S1002: The second AN device determines to allow the first VMR to provide the VMR service.

After the first VMR accesses the second AN device, the second AN device may judge whether the first VMR can provide the VMR service according to the authorization information for the first VMR.

In some possible implementation manners, if the second AN device receives authorization information for the first VMR, the second AN device may determine that the first VMR can provide the VMR service.

In some other possible implementation manners, the second AN device may judge that when the first VMR accesses the second AN device, according to the conditions that the first VMR should satisfy when providing the VMR service indicated by the authorization information for the first VMR, Whether it can provide VMR service.

S1003: The second AN device sends an RRC configuration message to the first VMR. Correspondingly, the first VMR receives the RRC configuration message from the second AN device.

Wherein, the RRC configuration message may include: indication information of resources used for the VMR to send reference signals.

Optionally, the RRC configuration message may also include an identifier (for example, VMR ID) of the first VMR. Wherein, the identifier of the first VMR may be a temporary identifier assigned to the first VMR by the second AN device.

S1004: The second AN device sends to other AN devices (the first AN device is used as an example for description below) an indication for instructing the VMR to send a reference signal resource. Correspondingly, other AN devices receive the indication from the second AN device.

Optionally, the indication may also include: an identifier of the first VMR.

In some possible implementations, the first AN device and the second AN device may be adjacent AN devices, and the second AN device may communicate with the first AN device through an interface (for example, an X2 or Xn interface) between the AN devices. Send instructions.

In other possible implementation manners, the first AN device and the second AN device may be controlled by the same core network device, and the second AN device may send an instruction to the first AN device through the core network device.

S1005: The first AN device sends to the UE an indication for instructing the resource of the VMR to send the reference signal, and correspondingly, the UE receives the indication from the first AN device.

For the specific content of S1005, reference may be made to S202, which will not be repeated here.

In addition, the first AN device may also send the indication to the UE according to the context of the UE.

In addition, the second AN device may also send the indication to the UE accessing the second AN device in the same manner.

S1006: According to the RRC configuration message, the first VMR broadcasts the reference signal on the resource used for the VMR to send the reference signal.

When the first VMR broadcasts the reference signal, UEs in the vehicle where the first VMR is located or near the vehicle can detect the reference signal, so that they can choose whether to connect to the first VMR.

S1007: The UE sends a measurement report to the first AN device. Correspondingly, the first AN device receives the measurement report from the UE. Wherein, the measurement report may include the measurement result of the reference signal of the first VMR detected by the UE according to the resource.

For the specific content of S1007, reference may be made to S203, which will not be repeated here.

In addition, the UE may determine whether to send a measurement report to the first AN device according to the UE's preference information for selecting a VMR.

For example, if the first preference information indicates: when the AN device and the VMR that the UE can access exist at the same time, the UE preferentially accesses the VMR, and the UE may send a measurement report to the first AN device.

For another example, if the first preference information indicates: when there are AN devices and VMRs that the UE can access at the same time, the UE preferentially accesses the AN device, and the signal quality of the AN device detected by the UE is higher than the signal quality of the VMR detected by the UE. When it is good, the UE may not send the measurement report to the first AN device.

S1008: The first AN device determines that the UE can access the first VMR.

When the first AN device determines, according to the measurement report, that the reference signal of the first VMR detected by the UE satisfies a predetermined condition, it may determine whether to allow the UE to access the first VMR according to authorization information for the UE and/or authorization information for the first VMR. a VMR.

For example, when the reference signal of the first VMR detected by the UE is greater than a predetermined threshold, if the first VMR belongs to a VMR that the UE is allowed to access, and the UE belongs to a UE that is allowed to access the first VMR, the first AN device determines that the UE The first VMR can be accessed; otherwise, the first AN device can determine that the UE cannot access the first VMR.

For specific content of S1008, reference may be made to S205 and S406, which will not be repeated here.

S1009: When the first AN device determines that the UE can access the first VMR, the first AN device initiates a handover process for the UE to the first VMR through the second AN device.

For the specific content of the switching process, reference may be made to S205, which will not be repeated here.

S1010: The first AN device sends a handover command to the UE.

Wherein, the switching command may include the identifier of the first VMR. The handover command may instruct the UE to handover from the first AN device to the first VMR.

S1011: The UE accesses the first VMR.

After the UE accesses the first VMR, the UE can communicate with the second AN device through the first VMR. For example, the UE may send a service data packet to the second AN device through the first VMR. For another example, the UE may receive the service data packet from the second AN device through the first VMR.

Optionally, when the UE accesses the first VMR, the first VMR may determine the RRC configuration message for the UE.

It should be understood that when the first AN device and the second AN device are the same AN device, S1004 may not be performed.

In some possible implementation manners, the first VMR may be the IAB host node DU, and the second AN device may be the IAB host node CU. In S1011, the second AN device determines an RRC configuration message for the UE.

Through this method, the first AN device accessed by the UE can notify the UE of the resource for detecting reference signals after knowing that the UE is allowed to access the VMR, and according to the measurement result of the reference signal of the first VMR detected by the UE on the resource, and the authorization information for the UE, and access the UE to the first VMR, so that the UE successfully accesses the first VMR.

Based on the same technical concept, the present application also provides a communication device, the structure of which is shown in FIG. 11 , including a communication unit 1101 and a processing unit 1102 . The communication apparatus 1100 can be applied to the AMF, AN equipment, or terminal equipment in the communication system shown in FIG. 1 , and can implement the communication methods provided in the above embodiments and examples of the present application. The functions of each unit in the apparatus 1100 are introduced below.

The communication unit 1101 is used for receiving and sending data.

When the communication device 1100 is applied to control plane network elements or AN equipment (in the scenario where AN equipment interacts with network elements in the core network), the communication unit 1101 can be implemented through physical interfaces, communication modules, communication interfaces, and input and output interfaces. . The communication device 1100 can be connected with a network cable or cable through the communication unit, and then establish a physical connection with other devices.

When the communication apparatus 1100 is applied to a terminal device or an AN device (in a scenario where the AN device interacts with the terminal device), the communication unit 1101 may be implemented by a transceiver, for example, a mobile communication module.

The mobile communication module can provide wireless communication solutions including 2G/3G/4G/5G applied to terminal equipment. The mobile communication module may include at least one antenna, at least one filter, a switch, a power amplifier, a low noise amplifier (low noise amplifier, LNA) and the like. The terminal device can access the AN device in the AN through the mobile communication module, and interact with the AN device; the AN device can also communicate with the connected terminal device through the mobile communication module.

In one embodiment, the communication device 1100 is applied to the first AN device in the embodiment of the application shown in FIG. 2A, FIG. 4-FIG. 5, and FIG. 8-FIG. 10 (for example, FIG. 2A, FIG. and the first AN device in FIG. 10, and the AN device in FIGS. 8-9). Wherein, the first AN device may be an AN device accessed by a terminal device, and the second AN device may be an AN device accessed by a first relay device. The specific functions of the processing unit 1102 in this embodiment will be introduced below.

The processing unit 1102 is specifically configured to: obtain authorization information for the terminal device; wherein, the authorization information for the terminal device is used to indicate that the terminal device is allowed to access the relay device; Sending an indication to instruct the terminal device to detect the resource of the reference signal; receiving a measurement report from the terminal device through the communication unit 1101; wherein, the measurement report includes the measurement result of the reference signal of the first relay device detected by the terminal device according to the resource; according to According to the authorization information and the measurement result of the terminal device, the terminal device is connected to the first relay device.

Optionally, the processing unit 1102 is specifically configured to receive authorization information for the terminal device from the AMF through the communication unit 1101 .

Optionally, the processing unit 1102 is specifically configured to receive an instruction from the second AN device or a control plane network element through the communication unit 1101 before sending the instruction to the terminal device; wherein, the second AN device is the first relay device accessing The AN device, the resource is the resource scheduled by the second AN device for the relay device to send a reference signal; or, after receiving the connection establishment request from the first relay device through the communication unit 1101, an indication is generated; wherein, the connection establishment The request is used to request the first relay device to access the first AN device, and the resource is the resource scheduled by the first AN device for the relay device to send the reference signal.

Optionally, the authorization information for the terminal device is also used to indicate the conditions that the terminal device should meet when accessing the relay device, and the measurement result is used to indicate the signal quality of the reference signal of the first relay device detected by the terminal device according to resources The processing unit 1102 is specifically configured to: when the terminal device satisfies the conditions that should be met when the terminal device accesses the relay device indicated by the authorization information for the terminal device, according to the signal quality indicated by the measurement result, connect the terminal device to the first relay device; A relay device.

Optionally, the processing unit 1102 is specifically configured to: obtain the authorization information for the first relay device before connecting the terminal device to the first relay device according to the authorization information for the terminal device and the measurement result; wherein, for The authorization information of the first relay device is used to indicate that the first relay device is allowed to provide relay services; according to the authorization information for the terminal device, the authorization information for the first relay device, and the measurement results, the terminal device is connected to the second relay device. A relay device.

Optionally, the processing unit 1102 is specifically configured to: receive authorization information for the first relay device from the AMF through the communication unit 1101; or receive authorization for the first relay device from the second AN device through the communication unit 1101 information.

Optionally, the authorization information for the terminal device is also used to indicate the conditions that the terminal device should meet when accessing the relay device, and the authorization information for the first relay device is also used to indicate that when the first relay device provides relay services Conditions that should be met, the measurement result is used to indicate the signal quality of the reference signal of the first relay device detected by the terminal device according to the resources; the processing unit 1102 is specifically configured to: when the terminal device meets the terminal specified by the authorization information for the terminal device When the conditions that should be met when the device accesses the relay device, and the first relay device meets the conditions that should be met when the first relay device provides relay services indicated in the authorization information for the first relay device, according to the measurement results The indicated signal quality is used to connect the terminal device to the first relay device.

Optionally, the conditions that the terminal device should meet when accessing the relay device include at least one of the following: location information of the terminal device when the terminal device accesses the relay device, area information of the terminal device when the terminal device accesses the relay device, Information about the time when the terminal device accesses the relay device, information about the relay device that the terminal device is allowed to access, and preference information for the terminal device to select the relay device.

Optionally, the conditions that the first relay device should meet when providing the relay service include at least one of the following: the location information of the first relay device when the first relay device provides the relay service, and the first relay device provides The path information of the first relay device when the relay service is provided, the area information of the first relay device when the first relay device provides the relay service, the time information of the first relay device providing the relay service, and the permission to access the first relay Terminal device information of the relay device.

Optionally, the processing unit 1102 is specifically configured to:

Sending an indication for instructing the terminal device to access the first relay device to the terminal device through the communication unit 1101; or

When the second AN device is an AN device accessed by the first relay device, the communication unit 1101 sends a first switching request to the first relay device via the second AN device, wherein the first switching request is used to request the terminal Switching the device from the first AN device to the first relay device; receiving a first switching response from the first relay device forwarded by the second AN device through the communication unit 1101, wherein the first switching response indicates that the first relay device allows Switching the terminal device from the first AN device to the first relay device; sending a first switching command to the terminal device through the communication unit 1101, wherein the first switching command is used to instruct the terminal device to switch from the first AN device to the first relay device relay device; or

When the first AN device is an AN device accessed by the first relay device, a second switching request is sent to the first relay device through the communication unit 1101, wherein the second switching request is used to request to switch the terminal device from the first AN Switching the device to the first relay device; receiving a second switching response from the first relay device through the communication unit 1101, wherein the second switching response indicates that the first relay device allows switching the terminal device from the first AN device to the second relay device A relay device; sending a second switching command to the terminal device through the communication unit 1101, where the second switching command is used to instruct the terminal device to switch from the first AN device to the first relay device.

In one embodiment, the communication device 1100 is applied to the AMF in the embodiment of the present application shown in FIG. 5-FIG. The AN device connected by the relay device. The specific functions of the processing unit 1102 in this embodiment will be introduced below.

The processing unit 1102 is specifically used for:

Obtain authorization information for the terminal device; determine, according to the authorization information for the terminal device, that the terminal device is allowed to access the relay device when accessing the first access network AN device; send the terminal device to the first AN device Authorization information; wherein, the authorization information for the terminal device is used to indicate that the terminal device is allowed to access the relay device; and/or

Obtain authorization information for the first relay device; determine that the first relay device is allowed to provide relay services when the first relay device accesses the second AN device according to the authorization information for the first relay device; The second AN device sends authorization information for the first relay device; where the authorization information for the first relay device is used to indicate that the first relay device is allowed to provide the relay service.

Optionally, the processing unit 1102 is specifically configured to: receive the subscription information for the terminal device from the UDR through the communication unit 1101; wherein, the subscription information for the terminal device includes authorization information for the terminal device; or, receive through the communication unit 1101 Policy information for the terminal device from the PCF; where the policy information for the terminal device includes authorization information for the terminal device.

Optionally, the processing unit 1102 is specifically configured to: receive subscription information for the first relay device from the UDM or UDR through the communication unit 1101, wherein the subscription information for the first relay device includes or, receive policy information for the first relay device from the PCF through the communication unit 1101, where the policy information for the first relay device includes the authorization information for the first relay device.

Optionally, the processing unit 1102 is specifically configured to:

Before obtaining the authorization information for the terminal device, obtain the first capability information of the terminal device, wherein the first capability information is used to indicate that the terminal device has the capability of accessing the relay device; according to the first capability information, obtain the terminal device's authorization information; or

Before obtaining the authorization information for the terminal device, obtain the second capability information of the terminal device; when it is determined according to the second capability information that the terminal device has the capability of accessing the relay device, obtain the authorization information for the terminal device.

Optionally, the processing unit 1102 is specifically configured to:

Before obtaining the authorization information for the first relay device, obtain third capability information of the first relay device, where the third capability information is used to indicate that the first relay device has the capability of providing relay services; according to the third Capability information, to obtain authorization information for the first relay device; or

Before obtaining the authorization information for the first relay device, obtain the fourth capability information of the first relay device; when it is determined according to the fourth capability information that the first relay device has the capability of providing relay services, obtain the Authorization information of a relay device.

Optionally, the authorization information for the terminal device is also used to indicate the conditions that the terminal device should meet when accessing the relay device; the authorization information for the first relay device is also used to indicate that when the first relay device provides the relay service Conditions that should be met.

Optionally, the conditions that the terminal device should meet when accessing the relay device include at least one of the following: location information of the terminal device when the terminal device accesses the relay device, area information of the terminal device when the terminal device accesses the relay device, Information about the time when the terminal device accesses the relay device, information about the relay devices that the terminal device is allowed to access, and preference information for the terminal device to select the relay device; the conditions that the first relay device should meet when providing relay services include at least one of the following: Item: location information of the first relay device when the first relay device provides relay service, path information of the first relay device when the first relay device provides relay service, The area information of the first relay device, the time information of the relay service provided by the first relay device, and the information of the terminal devices allowed to access the first relay device.

In one embodiment, the communication device 1100 is applied to the terminal equipment in the embodiment of the application shown in Figure 2A, Figure 4, Figure 8-10 (for example, the terminal equipment in Figure 2A and Figure 4, Figure 8- UE in Figure 10). Wherein, the first AN device may be an AN device accessed by a terminal device, and the second AN device may be an AN device accessed by a first relay device. The specific functions of the processing unit 1102 in this embodiment will be introduced below.

The processing unit 1102 is specifically used for:

Receive an indication from the AN device of the first access network through the communication unit 1101; where the indication is used to instruct the terminal device to detect the resource of the reference signal;

On the resource, the reference signal is detected, and a measurement report is generated; wherein, the measurement report includes a measurement result of the reference signal of the first relay device detected by the terminal device;

Send a measurement report to the first AN device through the communication unit 1101; wherein, the measurement report is used to trigger the first AN device to access the terminal device to the first relay device according to the authorization information and measurement results for the terminal device; wherein, for The authorization information of the terminal device is used to indicate that the terminal device is allowed to access the relay device.

Optionally, the processing unit 1102 is specifically configured to: send the first capability information to the first AN device through the communication unit 1101 before sending the measurement report to the first AN device; where the first capability information is used to indicate that the terminal device has an access or, send second capability information to the first AN device through the communication unit 1101; wherein, the second capability information is used by the first AN device to determine whether the terminal device has the capability to access the relay device.

Optionally, the processing unit 1102 is specifically configured to: after sending the measurement report to the first AN device,

Receive an instruction from the first AN device through the communication unit 1101 for instructing the terminal device to access the first relay device; according to the instruction for instructing the terminal device to access the first relay device, access the first relay device; or

Receive a switching command from the first AN device through the communication unit 1101, wherein the switching command is used to instruct the terminal device to switch from the first AN device to the first relay device; according to the switching command, switch from the first AN device to the first relay device relay device.

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

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

Based on the same technical idea, this application also provides a communication device, which can be applied to AMF, AN equipment, or terminal equipment in the communication system as shown in Figure 1, and can realize the above embodiments of the application and examples provided The communication method has the functions of the communication device shown in FIG. 11 . Referring to FIG. 12 , a communication device 1200 includes: a communication module 1201 , a processor 1202 and a memory 1203 . Wherein, the communication module 1201 , the processor 1202 and the memory 1203 are connected to each other.

Optionally, the communication module 1201 , the processor 1202 and the memory 1203 are connected to each other through a bus 1204 . The bus 1204 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 12 , but it does not mean that there is only one bus or one type of bus.

The communication module 1201 is configured to receive and send data, and realize communication interaction with other devices. For example, when the communication device 1200 is applied to a control plane network element, UPF or AN device (in the scenario where the AN device interacts with a network element in the core network), the communication module 1201 can use a physical interface, a communication module, a communication interface, Implementation of input and output interfaces. For another example, when the communication device 1200 is applied to a terminal device or an AN device (in a scenario where the AN device interacts with the terminal device), the communication module 1201 may also be implemented by a transceiver.

In one embodiment, the communication device 1200 is applied to the first AN device in the embodiment of the present application shown in FIG. 2A, FIG. 4-FIG. 5, and FIG. 8-FIG. 10 (for example, FIG. 2A, FIG. and the first AN device in FIG. 10, and the AN device in FIGS. 8-9). Wherein, the first AN device may be an AN device accessed by a terminal device, and the second AN device may be an AN device accessed by a first relay device. The processor 1202 is specifically used for:

Acquiring authorization information for the terminal device; where the authorization information for the terminal device is used to indicate that the terminal device is allowed to access the relay device; according to the authorization information for the terminal device, sending an instruction to the terminal device to instruct the terminal device to detect the reference signal resource; receiving a measurement report from the terminal device; wherein, the measurement report includes the measurement result of the reference signal of the first relay device detected by the terminal device according to the resource; according to the authorization information and the measurement result for the terminal device, connect the terminal device to into the first relay device.

In one embodiment, the communication device 1200 is applied to the AMF in the embodiment of the present application shown in FIG. 5 to FIG. The AN device connected by the relay device. The processor 1202 is specifically used for:

In one embodiment, the communication device 1200 is applied to the terminal equipment in the embodiment of the present application shown in Figure 2A, Figure 4, Figure 8-10 (for example, the terminal equipment in Figure 2A and Figure 4, Figure 8- UE in Figure 10). Wherein, the first AN device may be an AN device accessed by a terminal device, and the second AN device may be an AN device accessed by a first relay device. The processor 1202 is specifically used for:

receiving an indication from the AN device in the first access network; where the indication is used to instruct the terminal device to detect resources of the reference signal;

sending a measurement report to the first AN device; where the measurement report is used to trigger the first AN device to access the terminal device to the first relay device according to the authorization information and measurement results for the terminal device; where the authorization for the terminal device The information is used to indicate that the terminal device is allowed to access the relay device.

For specific functions of the processor 1202, reference may be made to the above descriptions in the communication methods provided in the embodiments of the present application and examples, as well as the specific functional description of the communication device 1100 in the embodiments of the present application shown in FIG. 11 , which will not be repeated here.

The memory 1203 is used to store program instructions and data, etc. Specifically, the program instructions may include program codes including computer operation instructions. The memory 1203 may include a random access memory (random access memory, RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The processor 1202 executes the program instructions stored in the memory 1203 and uses the data stored in the memory 1203 to implement the above functions, thereby realizing the communication method provided by the above embodiments of the present application.

It can be understood that the memory 1203 in FIG. 12 of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM ) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

Based on the above embodiments, an embodiment of the present application further provides a computer program, which, when the computer program is run on a computer, causes the computer to execute the communication method provided by the above embodiments.

Based on the above embodiments, the embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a computer, the computer executes the communication method provided by the above embodiments.

Wherein, the storage medium may be any available medium that can be accessed by a computer. By way of example but not limitation: computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or may be used to carry or store information in the form of instructions or data structures desired program code and any other medium that can be accessed by a computer.

Based on the above embodiments, the embodiments of the present application further provide a chip, the chip is used to read the computer program stored in the memory, and realize the communication method provided by the above embodiments.

Based on the above embodiments, an embodiment of the present application provides a chip system, the chip system includes a processor, configured to support a computer device to implement the functions involved in the service device, forwarding device, or site device in the above embodiments. In a possible design, the chip system further includes a memory, and the memory is used to store necessary programs and data of the computer device. The system-on-a-chip may consist of chips, or may include chips and other discrete devices.

To sum up, the embodiment of the present application provides a communication method, device, and device. In this method, the access network AN device accessed by the terminal device can notify the terminal device after knowing that the terminal device is allowed to access the relay device. Detect the resource of the reference signal, and connect the terminal device to the first relay device according to the measurement result of the reference signal of the first relay device detected by the terminal device on the resource, so that the terminal device successfully accesses the first relay device. relay device.

In each embodiment of the present application, if there is no special explanation and logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referred to each other, and the technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Apparently, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A communication method, applied to a first access network AN device, characterized in that it includes:

Acquiring authorization information for the terminal device; wherein, the authorization information for the terminal device is used to indicate that the terminal device is allowed to access the relay device; the first AN device is the AN device accessed by the terminal device;

Send an indication to the terminal device according to the authorization information for the terminal device, so as to instruct the terminal device to detect resources of reference signals;

receiving a measurement report from the terminal device; wherein the measurement report includes a measurement result of a reference signal of a first relay device detected by the terminal device according to the resource;

Connect the terminal device to the first relay device according to the authorization information for the terminal device and the measurement result.
The method according to claim 1, wherein said acquiring authorization information for terminal equipment comprises:

The authorization information for the terminal device is received from the Access and Mobility Management Function AMF.
The method according to claim 1 or 2, wherein, before sending the instruction to the terminal device, the method further comprises:

receiving the indication from a second AN device or a control plane network element; wherein, the second AN device is an AN device accessed by the first relay device, and the resources are scheduled by the second AN device resources used by the relay device to transmit reference signals; or

After receiving the connection establishment request from the first relay device, generating the indication; wherein the connection establishment request is used to request the first relay device to access the first AN device, and the resource is the resources scheduled by the first AN device for sending reference signals by the relay device.
The method according to any one of claims 1 to 3, characterized in that,

The authorization information for the terminal device is also used to indicate the conditions that the terminal device should meet when accessing the relay device, and the measurement result is used to indicate the first medium detected by the terminal device according to the resource. The signal quality of the reference signal of the relay equipment;

The accessing the terminal device to the first relay device according to the authorization information for the terminal device and the measurement result includes:

When the terminal device meets the conditions indicated by the authorization information for the terminal device that the terminal device should meet when accessing the relay device, according to the signal quality indicated by the measurement result, send the terminal device to Access to the first relay device.
The method according to any one of claims 1 to 4, characterized in that,

Before accessing the terminal device to the first relay device according to the authorization information for the terminal device and the measurement result, the method further includes:

Acquiring authorization information for the first relay device; wherein the authorization information for the first relay device is used to indicate that the first relay device is allowed to provide relay services;

The accessing the terminal device to the first relay device according to the authorization information for the terminal device and the measurement result includes:

Accessing the terminal device to the first relay device according to the authorization information for the terminal device, the authorization information for the first relay device, and the measurement result.
The method according to claim 5, wherein said acquiring authorization information for said first relay device comprises:

receiving the authorization information for the first relay device from the AMF; or

receiving the authorization information for the first relay device from the second AN device; wherein the second AN device is an AN device accessed by the first relay device.
The method according to claim 5 or 6, characterized in that,

The authorization information for the terminal device is also used to indicate the conditions that the terminal device should meet when accessing the relay device, and the authorization information for the first relay device is also used to instruct the first relay device to provide A condition that should be met when relaying the service, the measurement result is used to indicate the signal quality of the reference signal of the first relay device detected by the terminal device according to the resource;

The accessing the terminal device to the first relay device according to the authorization information for the terminal device, the authorization information for the first relay device, and the measurement result includes:

When the terminal device satisfies the conditions indicated by the authorization information for the terminal device that should be met when the terminal device accesses the relay device, and the first relay device satisfies the requirements for the first relay device When the conditions indicated by the authorization information that the first relay device should meet when providing the relay service, connect the terminal device to the first relay device according to the signal quality indicated by the measurement result .
The method according to claim 4 or 7, characterized in that,

The conditions that the terminal device should meet when accessing the relay device include at least one of the following: the location information of the terminal device when the terminal device accesses the relay device, and the location information of the terminal device when the terminal device accesses the relay device. Area information of the terminal device, time information for the terminal device to access the relay device, information about the relay device that the terminal device is allowed to access, and preference information for the terminal device to select the relay device.
The method according to claim 7, wherein the conditions that the first relay device should meet when providing the relay service include at least one of the following: when the first relay device provides the relay service, the first The location information of the relay device, the path information of the first relay device when the first relay device provides the relay service, and the area of the first relay device when the first relay device provides the relay service information, time information for the first relay device to provide the relay service, and information about terminal devices that are allowed to access the first relay device.
The method according to any one of claims 1 to 9, wherein connecting the terminal device to the first relay device comprises:

sending an indication to the terminal device to instruct the terminal device to access the first relay device; or

When the second AN device is the AN device accessed by the first relay device, the second AN device sends a first switching request to the first relay device, where the first switching request uses requesting to switch the terminal device from the first AN device to the first relay device; receiving a first switching response from the first relay device through the second AN device, wherein the The first handover response indicates that the first relay device allows handover of the terminal device from the first AN device to the first relay device; and sends a first handover command to the terminal device, wherein the The first switching command is used to instruct the terminal device to switch from the first AN device to the first relay device; or

When the first AN device is an AN device accessed by the first relay device, send a second handover request to the first relay device, where the second handover request is used to request that the The terminal device switches from the first AN device to the first relay device; receiving a second switching response from the first relay device, wherein the second switching response indicates that the first relay device Allowing the terminal device to be switched from the first AN device to the first relay device; sending a second switching command to the terminal device, where the second switching command is used to instruct the terminal device to switch from The first AN device switches to the first relay device.
A communication method applied to an access and mobility management function AMF, characterized in that it includes:

Obtain authorization information for the terminal device; determine, according to the authorization information for the terminal device, that the terminal device is allowed to access the relay device when accessing the first access network AN device; An AN device sends the authorization information for the terminal device; wherein the authorization information for the terminal device is used to indicate that the terminal device is allowed to access the relay device; and/or

Acquiring authorization information for the first relay device; according to the authorization information for the first relay device, determining that when the first relay device accesses the second AN device, the first relay device is allowed to provide Relay service; sending the authorization information for the first relay device to the second AN device; wherein, the authorization information for the first relay device is used to indicate that the first relay device is allowed to provide Follow up service.
The method according to claim 11, wherein said acquiring authorization information for terminal equipment comprises:

Receive subscription information for the terminal device from a unified data management UDM or a unified data storage UDR; wherein the subscription information for the terminal device includes the authorization information for the terminal device; or

receiving policy information for the terminal device from a policy control function PCF; wherein the policy information for the terminal device includes the authorization information for the terminal device.
The method according to claim 11, wherein said acquiring authorization information for the first relay device comprises:

receiving subscription information for the first relay device from UDM or UDR, wherein the subscription information for the first relay device includes the authorization information for the first relay device; or

Receive policy information for the first relay device from the PCF, where the policy information for the first relay device includes the authorization information for the first relay device.
The method according to any one of claims 11 to 13, characterized in that,

Before the acquiring the authorization information for the terminal device, the method further includes: acquiring first capability information of the terminal device, wherein the first capability information is used to indicate that the terminal device has an access relay device capability; the acquiring the authorization information for the terminal device includes: acquiring the authorization information for the terminal device according to the first capability information; or

Before the acquiring the authorization information for the terminal device, the method further includes: acquiring the second capability information of the terminal device; the acquiring the authorization information for the terminal device includes: when according to the second capability information, When it is determined that the terminal device has the capability of accessing the relay device, the authorization information for the terminal device is acquired.
The method according to any one of claims 11 to 14, characterized in that,

Before the acquiring the authorization information for the first relay device, the method further includes: acquiring third capability information of the first relay device, where the third capability information is used to indicate that the first The relay device has the capability of providing a relay service; the obtaining the authorization information for the first relay device includes: obtaining the authorization information for the first relay device according to the third capability information; or

Before the obtaining the authorization information for the first relay device, the method further includes: obtaining fourth capability information of the first relay device; the obtaining the authorization information for the first relay device includes: When it is determined according to the fourth capability information that the first relay device is capable of providing a relay service, the authorization information for the first relay device is acquired.
The method according to any one of claims 11 to 14, characterized in that,

The authorization information for the terminal device is also used to indicate the conditions that the terminal device should meet when accessing the relay device; the authorization information for the first relay device is also used to instruct the first relay device to provide Conditions that should be met when relaying a service.
The method of claim 16, wherein,

The conditions that the terminal device should meet when accessing the relay device include at least one of the following: the location information of the terminal device when the terminal device accesses the relay device, and the location information of the terminal device when the terminal device accesses the relay device. Area information of the terminal device, time information for the terminal device to access the relay device, information about the relay device that the terminal device is allowed to access, and preference information for the terminal device to select a relay device;

The conditions that the first relay device should meet when providing the relay service include at least one of the following: location information of the first relay device when the first relay device provides the relay service, and the first relay device Path information of the first relay device when the relay service is provided, area information of the first relay device when the first relay device provides the relay service, and the relay service provided by the first relay device time information, and information about terminal devices that are allowed to access the first relay device.
A communication method applied to a terminal device, characterized in that it includes:

receiving an indication from the AN device of the first access network; wherein, the indication is used to indicate resources of the terminal device to detect reference signals;

On the resource, the reference signal is detected, and a measurement report is generated; wherein, the measurement report includes a measurement result of the reference signal of the first relay device detected by the terminal device;

sending the measurement report to the first AN device; where the measurement report is used to trigger the first AN device to access the terminal device to the first AN device according to the authorization information for the terminal device and the measurement result. A relay device; wherein, the authorization information for the terminal device is used to indicate that the terminal device is allowed to access the relay device.
The method according to claim 18, wherein before sending the measurement report to the first AN device, the method further comprises:

Sending first capability information to the first AN device; wherein the first capability information is used to indicate that the terminal device has the capability of accessing a relay device; or

Sending second capability information to the first AN device; wherein the second capability information is used by the first AN device to determine whether the terminal device has the capability of accessing a relay device.
The method according to claim 18 or 19, wherein after sending the measurement report to the first AN device, the method further comprises:

receiving an indication from the first AN device for instructing the terminal device to access the first relay device; according to the indication for instructing the terminal device to access the first relay device, accessing the first relay device; or

receiving a switching command from the first AN device, wherein the switching command is used to instruct the terminal device to switch from the first AN device to the first relay device; according to the switching command, from the The first AN device switches to the first relay device.
A communication device, characterized by comprising:

a communication unit for receiving and sending data;

A processing unit, configured to execute the method according to any one of claims 1-20 through the communication unit.
A communication system, characterized in that it includes:

An access network AN device, configured to implement the method according to any one of claims 1-10;

Access and Mobility Management Function AMF, configured to implement the method according to any one of claims 11-17;

A terminal device, configured to implement the method according to any one of claims 18-20.
A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, and when the computer program is run on a computer, the computer is made to execute the computer program described in any one of claims 1-20. described method.
A chip, characterized in that the chip is coupled to a memory, and the chip reads a computer program stored in the memory to execute the method according to any one of claims 1-20.