WO2021203998A1 - Communication method and device - Google Patents

Abstract

The present application relates to a communication method and device. An access network device receives a first message from a first terminal device. The access network device obtains an identifier of a second terminal device and first relay instruction information from the first message, wherein the first relay instruction information is used for instructing the first terminal device to perform a relay service between the second terminal device and the access network device. In the embodiments of the present application, the access network device where the first terminal device is located can determine that the first terminal device is a relay terminal device, and can determine that the second terminal device is a distal terminal device. That is, in this way, a network of the relay terminal device can sense the distal terminal device.

Description

Communication method and equipment

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 202010265819.6, and the application name is "a UE2NW relay communication method, UE and network equipment" on April 7, 2020. All of them The content is incorporated into this application by reference; this application requires the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 202010478491.6, and the application title is "a communication method and equipment" on May 29, 2020, The entire content is incorporated into this application by reference.

Technical field

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

Background technique

At present, in addition to directly communicating with the base station, terminal equipment can also communicate with the base station through other terminal equipment. For example, in a public safety (public safety) scenario, a relay terminal device can be used as a relay for a remote terminal device, so that the remote terminal device 2 can communicate with the base station through the relay terminal device. This technology is called UE to Network Relay (UE2NW relay) technology.

The technology supported by the current standard for transmitting and receiving to the network through remote terminal equipment is called layer 3 (L3) relay technology. The reason is that the relay data is forwarded through the Internet Protocol (IP) layer, that is, the data of the remote terminal device is parsed by the relay terminal device to the IP layer, and then the relay terminal device is forwarded to the base station. For the L3 relay technology introduced by the long term evolution (LTE) system, the remote terminal equipment is transparent to the network of the relay terminal equipment. This means that the remote terminal device transmits data to the network where the relay terminal device is located through the relay terminal device. The network where the relay terminal device is located is not aware of the remote terminal device, and it does not know that there is a remote terminal. The presence of equipment.

Since the network where the relay terminal device is located cannot perceive the remote terminal device, some problems may occur. For example, if the remote terminal device is outside the coverage of the network (here, the network of the remote terminal device), the network of the remote terminal device cannot allocate resources for the remote terminal device, and the remote terminal device can only Use pre-configured resources. However, the pre-configured resources are generally limited, and the data transmission of the remote terminal device will be limited by the pre-configured resources, which may result in low data transmission quality, and may even fail to transmit due to insufficient pre-configured resources.

Summary of the invention

The embodiments of the present application provide a communication method and device, which are used to enable the network where the relay terminal device is located to perceive the remote terminal device.

In a first aspect, a first communication method is provided. The method includes: receiving a first message from a first terminal device; obtaining an identifier of a second terminal device from the first message, and first relay indication information, the The first relay indication information is used to instruct the first terminal device to perform a relay service between the second terminal device and the access network device.

The method may be executed by a first communication device, and the first communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip. Exemplarily, the first communication device is a network device, or a chip set in the network device for realizing the function of the network device, or other component used for realizing the function of the network device. In the following introduction process, it is taken as an example that the first communication device is a network device. Exemplarily, the network device is an access network device, such as a base station.

In the embodiment of the present application, the access network device where the relay terminal device (for example, the first terminal device) is located can receive the first message from the relay terminal device, and the remote terminal device (for example, The identification of the second terminal device), and the relay indication information can be obtained, so that the access network device can determine that the first terminal device is a relay terminal device and can determine that the second terminal device is a remote terminal device. That is, in this way, the network of the relay terminal device can perceive the remote terminal device. For example, if the remote terminal device is outside the coverage of the network (here, the network of the remote terminal device), the network of the remote terminal device cannot allocate resources for the remote terminal device. However, the network of the relay terminal device can allocate resources to the remote terminal device, so that the remote terminal device has a wider choice of resources when sending data, and when allocating resources, it can also be allocated according to the current network situation, which is helpful To improve the data transmission quality and transmission success rate of remote terminal equipment.

With reference to the first aspect, in a first optional implementation manner of the first aspect, the method further includes:

Establishing a binding relationship between the second terminal device and the first terminal device.

For example, the access network device binds the second terminal device to the first terminal device according to the SUI, so that the access network device can more clearly define the binding relationship between the second terminal device and the first terminal device, that is, the first terminal device A terminal device provides a relay service for the second terminal device.

With reference to the first aspect or the first optional implementation manner of the first aspect, in a second optional implementation manner of the first aspect, the identifier of the second terminal device is the layer of the second terminal device 2 Address, or an identifier assigned by the first terminal device to the second terminal device.

For example, the identifier of the second terminal device includes the SL destination identifier of the second terminal device, or includes the identifier allocated by the first terminal device for the second terminal device, or includes the SL destination identifier of the second terminal device and the first terminal device as the first terminal device. 2. The identification assigned by the terminal device. The SL destination identifier of the second terminal device is, for example, the SL destination identification number of the second terminal device, and the SL destination ID of the second terminal device is, for example, the layer 2 address of the second terminal device. The first terminal device is an identifier assigned to the second terminal device. The identifier is, for example, an IP address assigned by the first terminal device to the second terminal device. The IP address may be an IP address registered by the first terminal device to the access network device. , Or it may be the local address of the first terminal device, or the identifier assigned by the first terminal device to the second terminal device may also be another terminal device assigned by the first terminal device to the second terminal device that can indicate the second terminal device Logo.

In combination with the first aspect or the first optional implementation manner of the first aspect or the second optional implementation manner of the first aspect, in the third optional implementation manner of the first aspect, the first The message also includes information for indicating that the second terminal device is in the OOC state.

When the second terminal device is in the OOC state, the network where the second terminal device is located cannot allocate resources for the second terminal device, etc. In this case, if the second terminal device can access the first terminal device through the first terminal device If the network where the first terminal device is located can perceive the existence of the second terminal device, the network where the second terminal device is located can allocate resources for the first terminal device, etc. Therefore, in this case, the second terminal device The effect of accessing the network through the first terminal device is better. Then, if it is determined that the second terminal device is in the OOC state, the first terminal device may send the first message to the access network device, and if it is determined that the second terminal device is not currently in the OOC state, the first terminal device may not be connected to the access network device. The networked device sends the first message, that is, if the second terminal device is not currently in the OOC state, the network where the second terminal device is located can allocate resources for the second terminal device, etc. In this case, even if the first terminal device Not acting as the relay device of the second terminal device, the communication process of the second terminal device can also use the resources allocated by the network, which is relatively flexible. Therefore, the first terminal device may not be the relay device of the second terminal device. Or, in the embodiment of the present application, regardless of whether the second terminal device is currently in the OOC state or not in the OOC state, the first terminal device may send the first message to the access network device to be able to act as a relay for the second terminal device equipment. If this is the case, the first message may include information indicating that the second terminal device is in the OOC state, or may not include information indicating that the second terminal device is in the OOC state.

Combining the first aspect or the first optional implementation manner of the first aspect to any optional implementation manner of the third optional implementation manner of the first aspect, the fourth aspect of the first aspect may be In an optional embodiment, the method further includes:

Send a second message to the first terminal device, where the second message is used to configure a first radio bearer between the access network device and the first terminal device, and the first radio bearer is used to transmit data corresponding to Information of the second terminal device.

Equivalently, a dedicated radio bearer can be established for relay information, that is, the first radio bearer. If the first terminal device wants to send the control information of the second terminal device to the access network device (that is, the second terminal device needs to pass the first radio bearer). Information sent by the terminal device to the control plane of the network), the first terminal device can send the control information to the access network device through the first radio bearer, so that the access network device can determine that this is sent from the second terminal device Control information. If the access network device wants to send control information to the second terminal device (that is, the access network device needs to send control plane information to the second terminal device through the first terminal device), the access network device can also send control information through the first terminal device. The radio bearer sends the control information to the first terminal device, so that the first terminal device sends the control information to the second terminal device.

With reference to the fourth optional implementation manner of the first aspect, in a fifth optional implementation manner of the first aspect, the method further includes:

The third message from the second terminal device is received through the first radio bearer, wherein a second radio bearer is also present between the first terminal device and the access network device, and the second radio bearer Used to transmit information corresponding to the first terminal device.

If the second terminal device wants to send a third message to the access network device, the second terminal device may send the third message to the first terminal device, and the first terminal device forwards the third message to the access network device. For example, the first terminal device may send the third message to the access network device through the first radio bearer. The first radio bearer is used to transmit relay information, so the access network device can determine according to the first radio bearer that the third message is a message sent by the second terminal device.

With reference to the fifth optional implementation manner of the first aspect, in the sixth optional implementation manner of the first aspect, the third message is used to request resource allocation, and the method further includes:

Sending the first resource information to the first terminal device through the first radio bearer.

If the third message is used to request allocation of resources, the access network device may allocate resources to the second terminal device after receiving the third message, for example, allocate the first resource. Then the access network device can send the information of the first resource to the second terminal device. Of course, the access network device needs to send the information of the first resource to the first terminal device, and the first terminal device forwards the information of the first resource to the second terminal device. The information of the first resource can indicate the first resource. For example, the information of the first resource may include time-frequency location information of the first resource, and the like. For example, if the access network device sends the first resource information to the first terminal device through the first radio bearer, the first terminal device receives the first resource information from the access network device through the first radio bearer. Because the first radio bearer is used to transmit information corresponding to the second terminal device, or to transmit relay information, the first terminal device, after receiving the information of the first resource, will send the information of the first resource to The second terminal device.

Combining the first aspect or the first optional implementation manner of the first aspect to any optional implementation manner of the fourth optional implementation manner of the first aspect, the seventh aspect of the first aspect may In an optional embodiment, the method further includes:

Receive a third message from the first terminal device through the first bearer element of the second radio bearer, where the third message is uplink information corresponding to the second terminal device, and the second radio bearer is used for transmission Information corresponding to the first terminal device.

If the second terminal device wants to send a third message to the access network device, the second terminal device may send the third message to the first terminal device, and the first terminal device forwards the third message to the access network device. For example, the first terminal device may send the third message to the access network device through the second radio bearer. The second radio bearer is, for example, the SRB 1 or SRB 2 between the access network device and the first terminal device, that is, the second radio bearer is not a radio bearer corresponding to the second terminal device, or the second radio bearer is not dedicated to Transmit relay information. Then, if the first terminal device sends a third message to the access network device through the second radio bearer, in order to enable the access network device to determine that the third message is a message from the second terminal device, the first terminal device may send the third message to the access network device. The message is included in the first bearer element of the second radio bearer and sent, and the access network device can determine that the third message comes from the second terminal device according to the first bearer element. Wherein, the first bearer element includes the third message, and it can also be understood that the first bearer element includes information included in the third message. For example, the first bearer element may include the first information, which is equivalent to that the first bearer element includes the third message.

With reference to the seventh optional implementation manner of the first aspect, in the eighth optional implementation manner of the first aspect, the third message is used to request resource allocation, and the method further includes:

The information of the first resource is sent to the first terminal device through the second bearer element of the second radio bearer, where the information of the first resource is downlink information corresponding to the second terminal device.

If the third message is used to request allocation of resources, the access network device may allocate resources to the second terminal device after receiving the third message, for example, allocate the first resource. Then the access network device can send the information of the first resource to the second terminal device. Of course, the access network device needs to send the information of the first resource to the first terminal device, and the first terminal device forwards the information of the first resource to the second terminal device. The information of the first resource can indicate the first resource. For example, the information of the first resource may include time-frequency location information of the first resource, and the like. For example, if the access network device sends the first resource information to the first terminal device through the second radio bearer, the first terminal device receives the first resource information from the access network device through the second radio bearer. The second radio bearer is not a radio bearer corresponding to the second terminal device, or in other words, the second radio bearer is not dedicated to transmitting relay information. Then, if the access network device sends information about the first resource to the first terminal device through the second radio bearer, in order for the first terminal device to determine that the information about the first resource is information that needs to be sent to the second terminal device, access The network device may include the information of the first resource in the second bearer element of the second radio bearer to send, and the first terminal device can determine that the information of the first resource needs to be sent to the second terminal device according to the second bearer element.

Combining the first aspect or the first optional implementation manner of the first aspect to any optional implementation manner of the eighth optional implementation manner of the first aspect, the ninth aspect of the first aspect may be In an optional embodiment, the method further includes:

The first configuration information is sent to the first terminal device through the second radio bearer with the first terminal device, where the first configuration information is the configuration of the first terminal device corresponding to the third radio bearer, the The third radio bearer is a radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit interactive information between the second terminal device and the access network device; or,

Sending first configuration information and second configuration information to the first terminal device through the second radio bearer with the first terminal device, where the first configuration information indicates that the first terminal device corresponds to the third radio bearer The second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third radio bearer is the configuration between the first terminal device and the second terminal device Radio bearer, the third radio bearer is used to transmit interactive information between the second terminal device and the access network device.

It can be understood that the third radio bearer is a newly created radio bearer between the first terminal device and the second terminal device, and is used to transmit interactive information between the second terminal device and the access network device, or it can be understood as the third The radio bearer is used to transmit control information corresponding to the second terminal device, or the third radio bearer is used to transmit relay information. To configure the third radio bearer, for example, the access network device can configure the first terminal device, and the second terminal device configures the second terminal device according to the configuration information of the first terminal device. In this way, the access network device only needs to determine the configuration (that is, the first configuration information) of the first terminal device corresponding to the third radio bearer, and there is no need to determine too many configurations, which helps to reduce the access network The burden of equipment. Or, the access network device is configured with the first terminal device and the second terminal device. In this way, the access network device can determine that the first terminal device corresponds to the configuration of the third radio bearer (that is, the first configuration information) and the second terminal device corresponds to the configuration of the third radio bearer (that is, the second Configuration information), there is no need to determine the corresponding configuration for the terminal device, which helps to reduce the burden on the terminal device. Especially for some terminal devices with limited capabilities, the way the access network device determines the configuration information will be more friendly.

Combining the fourth optional implementation manner of the first aspect to any optional implementation manner of the sixth optional implementation manner of the first aspect, in the tenth optional implementation manner of the first aspect , The method further includes:

Sending second configuration information to the first terminal device through the first radio bearer, where the second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third radio bearer is all The radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit interactive information between the second terminal device and the access network device.

It can be understood that the third radio bearer is a newly created radio bearer between the first terminal device and the second terminal device, and is used to transmit interactive information between the second terminal device and the access network device, or it can be understood as the third The radio bearer is used to transmit control information corresponding to the second terminal device, or the third radio bearer is used to transmit relay information. To configure the third radio bearer, for example, the access network device may configure the second terminal device, and the first terminal device configures the first terminal device according to the configuration information of the second terminal device. In this way, the access network device only needs to determine the configuration of the second terminal device corresponding to the third radio bearer (that is, the second configuration information), and there is no need to determine too many configurations, which helps to reduce the access network. The burden of equipment.

Combining the first aspect or the first optional implementation manner of the first aspect to any optional implementation manner of the tenth optional implementation manner of the first aspect, in the eleventh aspect of the first aspect In an optional implementation manner, the method further includes:

Receiving a fourth message from the first terminal device through a third bearer element, where the fourth message is an uplink NAS message between the first terminal device and a core network device;

The fourth message is sent to the core network device through an N2 message corresponding to the first terminal device, and the fourth message is used by the core network device to allocate an IP address to the second terminal device.

In the embodiment of the present application, the second terminal device may send an uplink NAS message to the core network device, so that the core network device can perceive the existence of the second terminal device, so that the second terminal device can be assigned an IP address, etc. For example, the communication of the second terminal device needs to be charged later, because the core network device can perceive the existence of the second terminal device, and the second terminal device can be charged separately, so that the first terminal device and the second terminal device are charged separately. The billing of terminal equipment is clearer. For example, the first terminal device forwards the fourth message to the access network device through the first radio bearer, or the first terminal device forwards the fourth message to the access network device through the second radio bearer. Among them, the second radio bearer is not dedicated to transmitting relay information. If the first terminal device forwards the fourth message that needs to be relayed to the access network device through the second radio bearer, then in order to enable the access network device to determine that the fourth message needs to be sent to the core network device, the first terminal device may send the fourth message to the core network device. The four messages are included in the third bearer element and sent to the first terminal device through the second radio bearer. Wherein, the third bearer element includes the fourth message, and it can also be understood that the third bearer element includes information included in the fourth message. For example, the third bearer element may include the second information, which is equivalent to that the third bearer element includes the fourth message. Optionally, if the first terminal device forwards the fourth message to the access network device through the first radio bearer, the first terminal device may not need to include the fourth message (or the second information) in the third bearer element. Or, because the fourth message is a NAS message, even if the first terminal device sends the fourth message to the access network device through the first radio bearer, in order for the access network device to clarify that the fourth message needs to be sent to the core network device, The second terminal device may also include the fourth message (or the second information) in the third bearer element. In this case, the third bearer element is carried on the first radio bearer.

In addition, the access network device sends the fourth message to the core network device through the N2 message corresponding to the first terminal device, and the core network device does not need to establish an initial context for the second terminal device. The core network device communicates with the second terminal device. , The transmission channel of the first terminal device can be multiplexed, for example, the PDU session of the first terminal device can be multiplexed, and the processing procedure of the core network device can be saved.

Combining the first aspect or the first optional implementation manner of the first aspect to any optional implementation manner of the tenth optional implementation manner of the first aspect, in the twelfth aspect of the first aspect In an optional implementation manner, the method further includes:

Receiving a fourth message from the first terminal device through a third bearer element, where the fourth message is an uplink NAS message between the first terminal device and a core network device;

Send an initial UE message to the core network device, where the initial UE message includes the fourth message, and the fourth message is used by the core network device to allocate an IP address to the second terminal device.

In the embodiment of the present application, the second terminal device may send an uplink NAS message to the core network device, so that the core network device can perceive the existence of the second terminal device, so as to be able to allocate an IP address and the like to the second terminal device. For example, the communication of the second terminal device needs to be charged later, because the core network device can perceive the existence of the second terminal device, and the second terminal device can be charged separately, so that the first terminal device and the second terminal device are charged separately. The billing of terminal equipment is clearer. For example, the first terminal device forwards the fourth message to the access network device through the first radio bearer, or the first terminal device forwards the fourth message to the access network device through the second radio bearer. Among them, the second radio bearer is not dedicated to transmitting relay information. If the first terminal device forwards the fourth message that needs to be relayed to the access network device through the second radio bearer, then in order to enable the access network device to determine that the fourth message needs to be sent to the core network device, the first terminal device may send the fourth message to the core network device. The four messages are included in the third bearer element and sent to the first terminal device through the second radio bearer. Wherein, the third bearer element includes the fourth message, and it can also be understood that the third bearer element includes information included in the fourth message. For example, the third bearer element may include the second information, which is equivalent to that the third bearer element includes the fourth message. Optionally, if the first terminal device forwards the fourth message to the access network device through the first radio bearer, the first terminal device may not need to include the fourth message (or the second information) in the third bearer element. Or, because the fourth message is a NAS message, even if the first terminal device sends the fourth message to the access network device through the first radio bearer, in order for the access network device to clarify that the fourth message needs to be sent to the core network device, The second terminal device may also include the fourth message (or the second information) in the third bearer element. In this case, the third bearer element is carried on the first radio bearer.

In addition, the access network device sends the fourth message to the core network device through the initial UE message corresponding to the second terminal device, and the core network device can establish an initial context for the second terminal device. Communication can be carried out through the transmission channel of the second terminal device, for example, through the PDU session of the second terminal device, so that the information of the first terminal device and the information of the second terminal device can be distinguished more clearly, and the number of different terminal devices is reduced. The probability of confusion of the information.

In a second aspect, a second communication method is provided. The method includes: receiving a fifth message from a second terminal device, the fifth message including second relay indication information, and the second relay indication information is used to request The first terminal device provides a relay service for the second terminal device; and sends a first message to the access network device, where the first message includes the identifier of the second terminal device and includes first relay indication information, the The first relay indication information is used to instruct the first terminal device to perform a relay service between the second terminal device and the access network device.

The method may be executed by a second communication device, and the second communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip. Exemplarily, the second communication device is a terminal device, or a chip set in the terminal device for realizing the function of the terminal device, or other component used for realizing the function of the terminal device. Exemplarily, the terminal device is a relay terminal device in a relay scenario, that is, a terminal device that provides a relay service for other terminal devices, for example, it is called a first terminal device. In the following introduction process, it is taken as an example that the second communication device is the first terminal device.

With reference to the second aspect, in the first optional implementation manner of the second aspect, the identifier of the second terminal device is the layer 2 address of the second terminal device, or is the address of the first terminal device. The identifier assigned by the second terminal device.

With reference to the second aspect or the first optional implementation manner of the second aspect, in a second optional implementation manner of the second aspect, the first message further includes instructions for indicating that the second terminal device is OOC status information.

In combination with the second aspect or the first optional implementation manner of the second aspect or the second optional implementation manner of the second aspect, in the third optional implementation manner of the second aspect, the method further include:

Receive a second message from the access network device, where the second message is used to configure a first radio bearer between the access network device and the first terminal device, and the first radio bearer is used for The information corresponding to the first terminal device is transmitted.

With reference to the third optional implementation manner of the second aspect, in the fourth optional implementation manner of the second aspect, the method further includes:

The second configuration information from the access network device is received through the first radio bearer, where the second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third radio bearer is A radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit interactive information between the second terminal device and the access network device.

With reference to the fourth optional implementation manner of the second aspect, in the fifth optional implementation manner of the second aspect, the method further includes:

Forward the second configuration information to the second terminal device;

Receiving third configuration information from the second terminal device, where the third configuration information includes part or all of the content of the first configuration information;

Generating the configuration of the first terminal device corresponding to the third radio bearer according to the third configuration information.

In combination with the second aspect or the first optional implementation manner of the second aspect or the second optional implementation manner of the second aspect or the third optional implementation manner of the second aspect, in the first optional implementation manner of the second aspect In the six optional implementation manners, the method further includes:

Receive first configuration information from the access network device through a second radio bearer with the access network device, where the first configuration information is the configuration of the first terminal device corresponding to the third radio bearer , The third radio bearer is a radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit the communication between the second terminal device and the access network device Mutual information between;

Send fourth configuration information to the second terminal device, where the fourth configuration information is used to generate a configuration of the second terminal device corresponding to the third radio bearer, and the fourth configuration information includes the first Part or all of the configuration information.

In combination with the second aspect or the first optional implementation manner of the second aspect or the second optional implementation manner of the second aspect or the third optional implementation manner of the second aspect, in the first optional implementation manner of the second aspect Among the seven optional implementation manners, the method further includes:

Receive first configuration information and second configuration information from the access network device through a second radio bearer with the access network device, where the first configuration information indicates that the first terminal device corresponds to the first configuration information Three radio bearer configuration, the second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third radio bearer is the first terminal device and the second terminal device The third radio bearer is used to transmit interactive information between the second terminal device and the access network device;

Sending the second configuration information to the second terminal device.

Combining the fourth optional implementation manner of the second aspect to any optional implementation manner of the seventh optional implementation manner of the second aspect, in the eighth optional implementation manner of the second aspect , The method further includes:

Receiving a third message from the second terminal device through the third radio bearer;

Send a third message to the access network device through the first bearer element of the second radio bearer with the access network device, or send a third message to the access network device through the first radio bearer , Wherein the first bearer element is used to transmit uplink information corresponding to the second terminal device, and the first radio bearer is used to transmit information corresponding to the second terminal device.

The second terminal device may send a third message to the first terminal device through the third radio bearer, and the first terminal device receives the third message from the second terminal device through the third radio bearer. The third radio bearer is used to transmit information corresponding to the second terminal device, so the first terminal device can determine that the third message needs to be forwarded to the access network device according to the third radio bearer.

With reference to the eighth optional implementation manner of the second aspect, in a ninth optional implementation manner of the second aspect, the third message is used to request resource allocation, and the method further includes:

Receive information about the first resource from the access network device through the second bearer element of the second radio bearer, or receive information about the first resource from the access network device through the first radio bearer , The information of the first resource is downlink information corresponding to the second terminal device;

Sending the information of the first resource to the second terminal device through the third radio bearer.

Combining the second aspect or the first optional implementation manner of the second aspect to any optional implementation manner of the seventh optional implementation manner of the second aspect, the tenth optional implementation manner of the second aspect In an optional embodiment, the method further includes:

The third message from the second terminal device is received through the preset fourth radio bearer, or the third message from the second terminal device is received through the fourth bearer element of the fifth radio bearer, the fourth The radio bearer is used to transmit the interaction information between the second terminal device and the access network device, and the fourth bearer element is used to transmit the interaction between the second terminal device and the access network device information;

Send a third message to the access network device through the first bearer element of the second radio bearer with the access network device, or send a third message to the access network device through the first radio bearer , Wherein the first bearer element is used to transmit uplink information corresponding to the second terminal device, and the first radio bearer is used to transmit information corresponding to the second terminal device.

The second terminal device may send the third message to the first terminal device through the fourth radio bearer, and the first terminal device receives the third message from the second terminal device through the fourth radio bearer. The fourth radio bearer is a preset radio bearer, for example, a radio bearer specified by a protocol, used to transmit information corresponding to the second terminal device, so the first terminal device can determine that the third message needs to be forwarded according to the fourth radio bearer To the access network equipment.

With reference to the tenth optional implementation manner of the second aspect, in an eleventh optional implementation manner of the second aspect, the third message is used to request resource allocation, and the method further includes:

Receive information about the first resource from the access network device through the second bearer element of the second radio bearer, or receive information about the first resource from the access network device through the first radio bearer , The information of the first resource is downlink information corresponding to the second terminal device;

The information of the first resource is sent to the second terminal device through the fourth radio bearer, or the information of the first resource is sent to the second terminal device through the fourth bearer element.

Combining the second aspect or the first optional implementation manner of the second aspect to any optional implementation manner of the eleventh optional implementation manner of the second aspect, in the twelfth aspect of the second aspect In an optional implementation manner, the method further includes:

Receive a fourth message from the second terminal device through a fifth bearer element, the fourth message is a NAS message, and the fifth bearer element is used to transmit the uplink between the second terminal device and the core network device NAS news;

The fourth message is forwarded to the access network device through a third bearer element, where the third bearer element is used to transmit an uplink NAS message between the second terminal device and the core network device.

Regarding the technical effects brought about by the second aspect or various optional implementations of the second aspect, reference may be made to the introduction of the technical effects of the first aspect or the corresponding implementation manners.

In a third aspect, a third communication method is provided. The method includes: sending a fifth message to a first terminal device, the fifth message including second relay indication information, and the second relay indication information is used to request The first terminal device provides a relay service for the second terminal device, and the second relay indication information is used to determine the first relay indication information sent to the access network device, and the first relay indication information Used to instruct the first terminal device to perform a relay service between the second terminal device and the access network device; to receive a sixth message from the first terminal device, where the sixth message is used for It indicates that the connection with the first terminal device has been established.

The method may be executed by a third communication device, and the third communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip. Exemplarily, the third communication device is a terminal device, or a chip set in the terminal device for realizing the function of the terminal device, or other component used for realizing the function of the terminal device. Exemplarily, the terminal device is a remote terminal device in a relay scenario, that is, a terminal device that requires other terminal devices to provide a relay service, for example, it is called a second terminal device. In the following introduction process, it is taken as an example that the third communication device is the second terminal device.

With reference to the third aspect, in a first optional implementation manner of the third aspect, the method further includes:

Receiving second configuration information from the first terminal device, where the second configuration information is the configuration of the second terminal device corresponding to a third radio bearer, and the third radio bearer is used to transmit the second terminal device and Interactive information between the access network devices;

Send third configuration information to the first terminal device, where the third configuration information includes part or all of the content of the second configuration information, and the third configuration information is used to generate that the first terminal device corresponds to The configuration of the third radio bearer.

With reference to the third aspect, in a second optional implementation manner of the third aspect, the method further includes:

Receiving fourth configuration information from the first terminal device, where the fourth configuration information includes part or all of the first configuration information, and the first configuration information indicates that the first terminal device corresponds to the third wireless Bearer configuration, where the third radio bearer is used to transmit interactive information between the second terminal device and the access network device;

Generating the configuration of the second terminal device corresponding to the third radio bearer according to the fourth configuration information.

With reference to the third aspect, in a third optional implementation manner of the third aspect, the method further includes:

Receiving second configuration information from the first terminal device, where the second configuration information is the configuration of the second terminal device corresponding to a third radio bearer, and the third radio bearer is used to transmit the second terminal Interaction information between the device and the access network device.

Combining the third aspect or the first optional implementation manner of the third aspect to any optional implementation manner of the third optional implementation manner of the third aspect, the fourth aspect of the third aspect may be In an optional embodiment, the method further includes:

Send a third message to the first terminal device through a preset fourth radio bearer, or send a third message to the first terminal device through a third bearer element of the fifth radio bearer, the fourth radio bearer Is used to transmit the interaction information between the first terminal device and the access network device, and the third bearer element is used to transmit the interaction information between the first terminal device and the access network device.

With reference to the fourth optional implementation manner of the third aspect, in a fifth optional implementation manner of the third aspect, the third message is used to request resource allocation, and the method further includes:

Receiving the first resource information from the first terminal device through the fourth radio bearer, or receiving the first resource information from the first terminal device through the third bearer element.

In combination with the first optional implementation manner of the third aspect or the second optional implementation manner of the third aspect or the third optional implementation manner of the third aspect, the sixth optional implementation of the third aspect In an embodiment, the method further includes:

Sending a third message to the first terminal device through the third radio bearer.

With reference to the sixth optional implementation manner of the third aspect, in the seventh optional implementation manner of the third aspect, the third message is used to request resource allocation, and the method further includes:

Receiving the first resource information from the first terminal device through the third radio bearer.

Combining the third aspect or the first optional implementation manner of the third aspect to any optional implementation manner of the seventh optional implementation manner of the third aspect, the eighth optional implementation manner of the third aspect In an optional embodiment, the method further includes:

A fourth message is sent to the first terminal device through a fifth bearer element, the fourth message is a NAS message, and the fifth bearer element is used to transmit the uplink NAS between the first terminal device and the core network device information.

Regarding the technical effects brought by the third aspect or various optional implementations of the third aspect, please refer to the introduction to the technical effects of the first aspect or the corresponding implementation, or refer to the second aspect or the corresponding implementation Introduction of the technical effect of the method.

In a fourth aspect, a fourth communication method is provided. The method includes: receiving a seventh message from an access network device, the seventh message includes a fourth message, the fourth message is a NAS message, and the fourth The message includes the identifier of the second terminal device; according to the identifier of the second terminal device, an IP address is allocated to the second terminal device.

The method may be executed by a fourth communication device, and the fourth communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip. Exemplarily, the fourth communication device is a network device, or a chip set in the network device for realizing the function of the network device, or other component used for realizing the function of the network device, such as the network device It is a core network device, for example, a first core network device, and the first core network device is, for example, AMF or SMF.

With reference to the fourth aspect, in a first optional implementation manner of the fourth aspect, the method further includes:

Sending the IP address to the first terminal device.

If the second core network device assigns an IP address to the second terminal device, the first core network device can send the IP address to the first terminal device to forward the IP address to the second terminal device through the first terminal device .

With reference to the fourth aspect or the first optional implementation manner of the fourth aspect, in a second optional implementation manner of the fourth aspect, the seventh message is an N2 message corresponding to the first terminal device , Or the initial UE message corresponding to the second terminal device.

With reference to the second optional implementation manner of the fourth aspect, in a third optional implementation manner of the fourth aspect, the seventh message is an initial UE message corresponding to the second terminal device, and the Methods also include:

Establish an initial context for the second terminal device.

The core network device may establish a PDU session for the second terminal device, and the core network device and the second terminal device may use the PDU session of the second terminal device to transmit information.

With reference to the second optional implementation manner of the fourth aspect, in the fourth optional implementation manner of the fourth aspect, the seventh message is an N2 message corresponding to the first terminal device, and the method Also includes:

Establishing a binding relationship between the second terminal device and the first terminal device.

The first core network device may bind the ID of the first terminal device and the ID of the second terminal device, or it is understood that the first core network device may establish a binding relationship between the first terminal device and the second terminal device.

Regarding the technical effects of the fourth aspect or various optional implementations of the fourth aspect, please refer to the introduction of the technical effects of the first aspect or the corresponding implementation, or refer to the second aspect or the corresponding implementation Introduction of the technical effect of the method.

In a fifth aspect, a communication device is provided, for example, the communication device is the first communication device as described above. The first communication device is configured to execute the method in the foregoing first aspect or any optional implementation manner. Specifically, the first communication device may include a module for executing the method in the first aspect or any optional implementation manner, such as a processing module, and optionally, a transceiver module. Exemplarily, the transceiver module may include a sending module and a receiving module. The sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions. Exemplarily, the first communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a network device. Exemplarily, the network device is an access network device. In the following, it is taken as an example that the first communication device is an access network device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor (or a processing circuit). Alternatively, the sending module may be implemented by a transmitter, and the receiving module may be implemented by a receiver. The transmitter and the receiver may be different functional modules, or may be the same functional module, but can implement different functions. If the first communication device is a communication device, the transceiver is realized by, for example, an antenna, a feeder, and a codec in the communication device. Or, if the first communication device is a chip set in a communication device, the transceiver (or transmitter and receiver) is, for example, a communication interface in the chip, and the communication interface is connected to the radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components. In the introduction process of the fifth aspect, the introduction is continued by taking the first communication device as an access network device, and the processing module and the transceiver module as examples. in,

The transceiver module (or, the receiving module) is configured to receive a first message from a first terminal device;

The processing module is configured to obtain the identifier of the second terminal device and the first relay indication information from the first message, where the first relay indication information is used to indicate that the first terminal device is in the first 2. Relay service between terminal equipment and access network equipment.

With reference to the fifth aspect, in a first optional implementation manner of the fifth aspect, the processing module is further configured to establish a binding relationship between the second terminal device and the first terminal device.

With reference to the fifth aspect or the first optional implementation manner of the fifth aspect, in a second optional implementation manner of the fifth aspect, the identifier of the second terminal device is the layer of the second terminal device 2 Address, or an identifier assigned by the first terminal device to the second terminal device.

In combination with the fifth aspect or the first optional implementation manner of the fifth aspect or the second optional implementation manner of the fifth aspect, in the third optional implementation manner of the fifth aspect, the first The message also includes information for indicating that the second terminal device is in the OOC state.

Combining the fifth aspect or the first optional implementation manner of the fifth aspect to the third optional implementation manner of the fifth aspect, the fourth optional implementation manner of the fifth aspect In an optional implementation manner, the transceiver module (or, the sending module) is further configured to send a second message to the first terminal device, and the second message is used to configure the access network device and the The first radio bearer between the first terminal devices, and the first radio bearer is used to transmit information corresponding to the second terminal device.

With reference to the fourth optional implementation manner of the fifth aspect, in the fifth optional implementation manner of the fifth aspect, the transceiver module (or, the receiving module) is further configured to pass through the first The radio bearer receives the third message from the second terminal device, where there is a second radio bearer between the first terminal device and the access network device, and the second radio bearer is used to transmit data corresponding to Information of the first terminal device.

With reference to the fifth optional implementation manner of the fifth aspect, in the sixth optional implementation manner of the fifth aspect, the third message is used to request resource allocation, and the transceiver module (or, the sending Module), which is further configured to send the first resource information to the first terminal device through the first radio bearer.

Combining the fifth aspect or the first optional implementation manner of the fifth aspect to any optional implementation manner of the fourth optional implementation manner of the fifth aspect, the seventh optional implementation manner of the fifth aspect In an optional implementation manner, the transceiver module (or, the receiving module) is further configured to receive a third message from the first terminal device through the first bearer element of the second radio bearer, and the third message To correspond to the uplink information of the second terminal device, the second radio bearer is used to transmit information corresponding to the first terminal device.

With reference to the seventh optional implementation manner of the fifth aspect, in the eighth optional implementation manner of the fifth aspect, the third message is used to request resource allocation, and the transceiver module (or, the sending Module), further configured to send information about the first resource to the first terminal device through a second bearer element of the second radio bearer, where the information about the first resource is corresponding to the downlink of the second terminal device information.

Combining the fifth aspect or the first optional implementation manner of the fifth aspect to any optional implementation manner of the eighth optional implementation manner of the fifth aspect, the ninth optional implementation manner of the fifth aspect In an optional implementation manner, the transceiver module (or, the sending module) is further configured to:

The first configuration information is sent to the first terminal device through the second radio bearer with the first terminal device, where the first configuration information is the configuration of the first terminal device corresponding to the third radio bearer, the The third radio bearer is a radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit the interaction between the second terminal device and the access network device Information; or,

Sending first configuration information and second configuration information to the first terminal device through the second radio bearer with the first terminal device, where the first configuration information indicates that the first terminal device corresponds to the third radio bearer The second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third radio bearer is the configuration between the first terminal device and the second terminal device Radio bearer, the third radio bearer is used to transmit interactive information between the second terminal device and the access network device.

Combining the fourth optional implementation manner of the fifth aspect to any optional implementation manner of the sixth optional implementation manner of the fifth aspect, in the tenth optional implementation manner of the fifth aspect , The transceiver module (or, the sending module) is further configured to send second configuration information to the first terminal device through the first radio bearer, and the second configuration information is the second terminal The device corresponds to the configuration of a third radio bearer, the third radio bearer is a radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit the second terminal Interaction information between the device and the access network device.

Combining the fifth aspect or the first optional implementation manner of the fifth aspect to any one optional implementation manner of the tenth optional implementation manner of the fifth aspect, in the eleventh aspect of the fifth aspect In an optional implementation manner, the transceiver module is further used for:

Receiving a fourth message from the first terminal device through a third bearer element, where the fourth message is an uplink NAS message between the first terminal device and a core network device;

The fourth message is sent to the core network device through an N2 message corresponding to the first terminal device, and the fourth message is used by the core network device to allocate an IP address to the second terminal device.

Or, in combination with the fifth aspect or the first optional implementation manner of the fifth aspect to the tenth optional implementation manner of the fifth aspect, the tenth optional implementation manner of the fifth aspect In an alternative embodiment,

The receiving module is further configured to receive a fourth message from the first terminal device through a third bearer element, where the fourth message is an uplink NAS message between the first terminal device and a core network device;

The sending module is further configured to send the fourth message to the core network device through the N2 message corresponding to the first terminal device, and the fourth message is used for the core network device to be the second The terminal device assigns an IP address.

Combining the fifth aspect or the first optional implementation manner of the fifth aspect to any one optional implementation manner of the tenth optional implementation manner of the fifth aspect, in the twelfth aspect of the fifth aspect In an optional implementation manner, the transceiver module is further used for:

Receiving a fourth message from the first terminal device through a third bearer element, where the fourth message is an uplink NAS message between the first terminal device and a core network device;

Send an initial UE message to the core network device, where the initial UE message includes the fourth message, and the fourth message is used by the core network device to allocate an IP address to the second terminal device.

Or, in combination with the fifth aspect or the first optional implementation manner of the fifth aspect to the tenth optional implementation manner of the fifth aspect, the tenth optional implementation manner of the fifth aspect In the two alternative implementations,

The receiving module is further configured to receive a fourth message from the first terminal device through a third bearer element, where the fourth message is an uplink NAS message between the first terminal device and a core network device;

The sending module is further configured to send an initial UE message to the core network device, where the initial UE message includes the fourth message, and the fourth message is used when the core network device is the second terminal device Assign an IP address.

Regarding the technical effects brought about by the fifth aspect or various optional implementation manners of the fifth aspect, reference may be made to the introduction of the technical effects of the first aspect or corresponding implementation manners.

In a sixth aspect, a communication device is provided, for example, the communication device is the second communication device as described above. The second communication device is configured to execute the method in the above second aspect or any optional implementation manner. Specifically, the second communication device may include a module for executing the method in the second aspect or any optional implementation manner, such as a processing module, and optionally, a transceiver module. Exemplarily, the transceiver module may include a sending module and a receiving module. The sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions. Exemplarily, the second communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a terminal device. Exemplarily, the terminal device is a relay terminal device in a relay scenario, such as a first terminal device. In the following, it is taken as an example that the second communication device is the first terminal device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor (or a processing circuit). Alternatively, the sending module may be implemented by a transmitter, and the receiving module may be implemented by a receiver. The transmitter and the receiver may be different functional modules, or may be the same functional module, but can implement different functions. If the second communication device is a communication device, the transceiver is realized by, for example, an antenna, a feeder, and a codec in the communication device. Or, if the second communication device is a chip set in a communication device, the transceiver (or, transmitter and receiver) is, for example, a communication interface in the chip, and the communication interface is connected to a radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components. In the introduction process of the sixth aspect, the second communication device is the first terminal device, and the processing module, the sending module, and the receiving module are used as examples for the introduction. in,

The receiving module is configured to receive a fifth message from a second terminal device, where the fifth message includes second relay indication information, and the second relay indication information is used to request the first terminal device to be the first terminal device. 2. Terminal equipment provides relay services;

The sending module is configured to send a first message to an access network device, where the first message includes an identifier of the second terminal device and includes first relay indication information, and the first relay indication information is used to indicate The first terminal device performs a relay service between the second terminal device and the access network device.

or,

The transceiver module is configured to receive a fifth message from a second terminal device, where the fifth message includes second relay indication information, and the second relay indication information is used to request the first terminal device to be the first terminal device. 2. Terminal equipment provides relay services;

The processing module is configured to obtain first relay instruction information according to the second relay instruction information, and the first relay instruction information is used to instruct the first terminal device to connect to and from the second terminal device. Relay service between devices connected to the network;

The transceiver module is configured to send a first message to an access network device, where the first message includes the identifier of the second terminal device and includes the first relay indication information.

With reference to the sixth aspect, in the first optional implementation manner of the sixth aspect, the identifier of the second terminal device is the layer 2 address of the second terminal device, or is the address of the first terminal device. The identifier assigned by the second terminal device.

With reference to the sixth aspect or the first optional implementation manner of the sixth aspect, in a second optional implementation manner of the sixth aspect, the first message further includes instructions for indicating that the second terminal device is OOC status information.

In combination with the sixth aspect or the first optional implementation manner of the sixth aspect or the second optional implementation manner of the sixth aspect, in a third optional implementation manner of the sixth aspect, the receiving module (Or, the transceiver module) is further configured to receive a second message from the access network device, where the second message is used to configure the first message between the access network device and the first terminal device A radio bearer, and the first radio bearer is used to transmit information corresponding to the first terminal device.

With reference to the third optional implementation manner of the sixth aspect, in the fourth optional implementation manner of the sixth aspect, the receiving module (or the transceiver module) is further configured to pass through the first The radio bearer receives second configuration information from the access network device, where the second configuration information is the configuration of the second terminal device corresponding to a third radio bearer, and the third radio bearer is the first terminal A radio bearer between a device and the second terminal device, and the third radio bearer is used to transmit interactive information between the second terminal device and the access network device.

With reference to the fourth optional implementation manner of the sixth aspect, in the fifth optional implementation manner of the sixth aspect,

The sending module (or the transceiving module) is further configured to forward the second configuration information to the second terminal device;

The receiving module (or, the transceiver module) is further configured to receive third configuration information from the second terminal device, where the third configuration information includes part or all of the content of the first configuration information;

The processing module is configured to generate a configuration of the first terminal device corresponding to the third radio bearer according to the third configuration information.

Combining the sixth aspect or the first optional implementation manner of the sixth aspect to any one of the optional implementation manners of the third optional implementation manner of the sixth aspect, the sixth aspect of the sixth aspect may be In the selected implementation,

The receiving module (or the transceiver module) is further configured to receive first configuration information from the access network device through a second radio bearer with the access network device, and the first configuration The information is the configuration of the first terminal device corresponding to the third radio bearer, the third radio bearer is the radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used for To transmit interactive information between the second terminal device and the access network device;

The sending module (or the transceiving module) is further configured to send fourth configuration information to the second terminal device, where the fourth configuration information is used to generate that the second terminal device corresponds to the third terminal device. For the configuration of the radio bearer, the fourth configuration information includes part or all of the content of the first configuration information.

Combining the sixth aspect or the first optional implementation manner of the sixth aspect to any optional implementation manner of the third optional implementation manner of the sixth aspect, the seventh optional implementation manner of the sixth aspect In the selected implementation,

The receiving module (or, the transceiving module) is further configured to receive the first configuration information and the second configuration information from the access network device through a second radio bearer with the access network device, The first configuration information is the configuration of the first terminal device corresponding to the third radio bearer, the second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third The radio bearer is a radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit interactive information between the second terminal device and the access network device;

The sending module (or, the transceiving module) is further configured to send the second configuration information to the second terminal device.

Combining the fourth optional implementation manner of the sixth aspect to any optional implementation manner of the seventh optional implementation manner of the sixth aspect, in the eighth optional implementation manner of the sixth aspect middle,

The receiving module (or the transceiving module) is further configured to receive a third message from the second terminal device through the third radio bearer;

The sending module (or, the transceiving module) is further configured to send a third message to the access network device through the first bearer element of the second radio bearer with the access network device, or, A third message is sent to the access network device through a first radio bearer, where the first bearer element is used to transmit uplink information corresponding to the second terminal device, and the first radio bearer is used to transmit corresponding Information on the second terminal device.

With reference to the eighth optional implementation manner of the sixth aspect, in the ninth optional implementation manner of the sixth aspect, the third message is used to request resource allocation,

The receiving module (or, the transceiver module) is further configured to receive the information of the first resource from the access network device through the second bearer element of the second radio bearer, or, through the first A radio bearer receives information about a first resource from the access network device, where the information about the first resource is downlink information corresponding to the second terminal device;

The sending module (or the transceiving module) is further configured to send the information of the first resource to the second terminal device through the third radio bearer.

Combining the sixth aspect or the first optional implementation manner of the sixth aspect to the seventh optional implementation manner of the sixth aspect, the tenth optional implementation manner of the sixth aspect In the selected implementation,

The receiving module (or the transceiving module) is further configured to receive the third message from the second terminal device via a preset fourth radio bearer, or receive via a fourth bearer element of the fifth radio bearer A third message from the second terminal device, the fourth radio bearer is used to transmit interactive information between the second terminal device and the access network device, and the fourth bearer element is used to transmit all The interaction information between the second terminal device and the access network device;

The sending module (or, the transceiving module) is further configured to send a third message to the access network device through the first bearer element of the second radio bearer with the access network device, or, A third message is sent to the access network device through a first radio bearer, where the first bearer element is used to transmit uplink information corresponding to the second terminal device, and the first radio bearer is used to transmit corresponding Information on the second terminal device.

With reference to the tenth optional implementation manner of the sixth aspect, in the eleventh optional implementation manner of the sixth aspect, the third message is used to request resource allocation,

The receiving module (or, the transceiver module) is further configured to receive the information of the first resource from the access network device through the second bearer element of the second radio bearer, or, through the first A radio bearer receives information about a first resource from the access network device, where the information about the first resource is downlink information corresponding to the second terminal device;

The sending module (or, the transceiving module) is further configured to send information of the first resource to the second terminal device through the fourth radio bearer, or to send information about the first resource through the fourth bearer element The information of the first resource is sent to the second terminal device.

Combining the sixth aspect or the first optional implementation manner of the sixth aspect to any one of the optional implementation manners of the eleventh optional implementation manner of the sixth aspect, in the twelfth aspect of the sixth aspect In an alternative embodiment,

The receiving module (or, the transceiving module) is further configured to receive a fourth message from the second terminal device through a fifth bearer element, the fourth message is a NAS message, and the fifth bearer element is used Transmitting the uplink NAS message between the second terminal device and the core network device;

The sending module (or the transceiver module) is further configured to forward the fourth message to the access network device through a third bearer element, and the third bearer element is used to transmit the second terminal device Uplink NAS message with core network equipment.

Regarding the technical effects brought about by the sixth aspect or various optional implementation manners, reference may be made to the introduction of the technical effects of the second aspect or corresponding implementation manners.

In a seventh aspect, a communication device is provided, for example, the communication device is the aforementioned third communication device. The third communication device is configured to execute the method in the foregoing third aspect or any optional implementation manner. Specifically, the third communication device may include a module for executing the method in the third aspect or any optional implementation manner, such as a processing module, and optionally, a transceiver module. Exemplarily, the transceiver module may include a sending module and a receiving module. The sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions. Exemplarily, the third communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a terminal device. Exemplarily, the terminal device is a remote terminal device in a relay scenario, such as a second terminal device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor (or a processing circuit). Alternatively, the sending module may be implemented by a transmitter, and the receiving module may be implemented by a receiver. The transmitter and the receiver may be different functional modules, or may be the same functional module, but can implement different functions. If the third communication device is a communication device, the transceiver is realized by, for example, an antenna, a feeder, and a codec in the communication device. Or, if the third communication device is a chip set in the communication device, the transceiver (or, the transmitter and the receiver) is, for example, a communication interface in the chip, and the communication interface is connected to the radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components. In the introduction of the seventh aspect, the processing module, the sending module, and the receiving module are taken as examples for introduction. in,

The sending module is configured to send a fifth message to a first terminal device, where the fifth message includes second relay indication information, and the second relay indication information is used to request that the first terminal device is a second The terminal device provides a relay service, and the second relay indication information is used to determine the first relay indication information sent to the access network device, and the first relay indication information is used to instruct the first terminal The device performs a relay service between the second terminal device and the access network device;

The receiving module is configured to receive a sixth message from the first terminal device, where the sixth message is used to indicate that a connection with the first terminal device has been established.

or,

The processing module is configured to obtain second relay indication information, where the second relay indication information is used to request the first terminal device to provide a relay service for the second terminal device, and the second relay The indication information is used to determine the first relay indication information sent to the access network device, and the first relay indication information is used to indicate that the first terminal device is in the second terminal device and the access network device. Relay service between;

The transceiver module (or, the sending module) is configured to send a fifth message to the first terminal device, where the fifth message includes second relay indication information;

The transceiver module (or, the receiving module) is further configured to receive a sixth message from the first terminal device, where the sixth message is used to indicate that the connection with the first terminal device has been established .

With reference to the seventh aspect, in the first optional implementation manner of the seventh aspect,

The receiving module (or the transceiver module) is further configured to receive second configuration information from the first terminal device, where the second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, The third radio bearer is used to transmit interactive information between the second terminal device and the access network device;

The sending module (or the transceiving module) is further configured to send third configuration information to the first terminal device, where the third configuration information includes part or all of the content of the second configuration information, so The third configuration information is used to generate the configuration of the first terminal device corresponding to the third radio bearer.

With reference to the seventh aspect, in a second optional implementation manner of the seventh aspect,

The receiving module (or, the transceiving module) is further configured to receive fourth configuration information from the first terminal device, where the fourth configuration information includes part or all of the first configuration information, and The first configuration information is the configuration of the first terminal device corresponding to a third radio bearer, and the third radio bearer is used to transmit interactive information between the second terminal device and the access network device;

The processing module is configured to generate a configuration of the second terminal device corresponding to the third radio bearer according to the fourth configuration information.

With reference to the seventh aspect, in a third optional implementation manner of the seventh aspect, the receiving module (or the transceiving module) is further configured to receive second configuration information from the first terminal device, The second configuration information is a configuration of the second terminal device corresponding to a third radio bearer, and the third radio bearer is used to transmit interaction information between the second terminal device and the access network device.

Combining the seventh aspect or the first optional implementation manner of the seventh aspect to the third optional implementation manner of the seventh aspect, the fourth optional implementation manner of the seventh aspect In an optional implementation manner, the sending module (or, the transceiver module) is further configured to send a third message to the first terminal device through a preset fourth radio bearer, or to send a third message to the first terminal device through a fifth radio bearer. The third bearer element sends a third message to the first terminal device, and the fourth radio bearer is used to transmit interactive information between the first terminal device and the access network device, and the third bearer element Used to transmit interactive information between the first terminal device and the access network device.

With reference to the fourth optional implementation manner of the seventh aspect, in the fifth optional implementation manner of the seventh aspect, the third message is used to request resource allocation, and the receiving module (or, the transceiver Module), further configured to receive information about the first resource from the first terminal device through the fourth radio bearer, or receive information about the first resource from the first terminal device through the third bearer element information.

In combination with the first optional implementation manner of the seventh aspect or the second optional implementation manner of the seventh aspect or the third optional implementation manner of the seventh aspect, the sixth optional implementation manner of the seventh aspect In the implementation manner, the sending module (or the transceiving module) is further configured to send a third message to the first terminal device through the third radio bearer.

With reference to the sixth optional implementation manner of the seventh aspect, in the seventh optional implementation manner of the seventh aspect, the third message is used to request resource allocation, and the receiving module (or, the transceiver Module), which is further configured to receive the first resource information from the first terminal device through the third radio bearer.

Combining the seventh aspect or the first optional implementation manner of the seventh aspect to any optional implementation manner of the seventh optional implementation manner of the seventh aspect, the eighth aspect of the seventh aspect may be In an optional implementation manner, the sending module (or the transceiving module) is further configured to send a fourth message to the first terminal device through a fifth bearer element, where the fourth message is a NAS message, and the The fifth bearer element is used to transmit the uplink NAS message between the first terminal device and the core network device.

Regarding the technical effects brought about by the seventh aspect or various optional implementation manners of the seventh aspect, reference may be made to the introduction of the technical effects of the third aspect or corresponding implementation manners.

In an eighth aspect, a communication device is provided, for example, the communication device is the fourth communication device as described above. The fourth communication device is configured to execute the method in the foregoing fourth aspect or any optional implementation manner. Specifically, the fourth communication device may include a module for executing the method in the fourth aspect or any optional implementation manner, such as a processing module, and optionally, a transceiver module. Exemplarily, the transceiver module may include a sending module and a receiving module. The sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions. Exemplarily, the fourth communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a network device. Exemplarily, the network device is a core network device, such as a first core network device, and the first core network device is, for example, AMF or SMF. In the following, it is taken as an example that the fourth communication device is the first core network device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor (or a processing circuit). Alternatively, the sending module may be implemented by a transmitter, and the receiving module may be implemented by a receiver. The transmitter and the receiver may be different functional modules, or may be the same functional module, but can implement different functions. If the fourth communication device is a communication device, the transceiver is realized by, for example, an antenna, a feeder, and a codec in the communication device. Or, if the fourth communication device is a chip set in the communication device, the transceiver (or, the transmitter and the receiver) is, for example, a communication interface in the chip, and the communication interface is connected to the radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components. In the introduction process of the eighth aspect, the fourth communication device is continued to be the first core network device, and the processing module and the transceiving module are taken as examples for the introduction. in,

The transceiver module (or, the receiving module) is configured to receive a seventh message from an access network device, the seventh message includes a fourth message, the fourth message is a NAS message, and the fourth message The message includes the identification of the second terminal device;

The processing module is configured to allocate an IP address to the second terminal device according to the identifier of the second terminal device.

With reference to the eighth aspect, in a first optional implementation manner of the eighth aspect, the transceiver module (or, the sending module) is further configured to send the IP address to the first terminal device.

With reference to the eighth aspect or the first optional implementation manner of the eighth aspect, in a second optional implementation manner of the eighth aspect, the seventh message is an N2 message corresponding to the first terminal device , Or the initial UE message corresponding to the second terminal device.

With reference to the second optional implementation manner of the eighth aspect, in a third optional implementation manner of the eighth aspect, the seventh message is an initial UE message corresponding to the second terminal device, and the The processing module is also used to establish an initial context for the second terminal device.

With reference to the second optional implementation manner of the eighth aspect, in a fourth optional implementation manner of the eighth aspect, the seventh message is an N2 message corresponding to the first terminal device, and the processing The module is also used to establish a binding relationship between the second terminal device and the first terminal device.

Regarding the technical effects brought about by the eighth aspect or various optional implementation manners of the eighth aspect, reference may be made to the introduction of the technical effects of the fourth aspect or corresponding implementation manners.

In a ninth aspect, a communication device (or, referred to as a network device) is provided. The communication device is, for example, the first communication device as described above. The communication device includes a processor (or processing circuit) and a communication interface (or interface circuit), and the communication interface can be used to communicate with other devices or equipment. Optionally, it may also include a memory for storing computer instructions. The processor and the memory are coupled with each other, and are used to implement the methods described in the foregoing first aspect or various optional implementation manners of the first aspect. Alternatively, the first communication device may not include a memory, and the memory may be located outside the first communication device. The processor, the memory, and the communication interface are coupled with each other, and are used to implement the methods described in the foregoing first aspect or various optional implementation manners of the first aspect. For example, when the processor executes the computer instructions stored in the memory, the first communication device is caused to execute the method in the foregoing first aspect or any one of the optional implementation manners. Exemplarily, the first communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a network device. Exemplarily, the network device is an access network device.

Wherein, if the first communication device is a communication device, the communication interface is realized by a transceiver (or a transmitter and a receiver) in the communication device, for example, the transceiver is realized by an antenna, a feeder and a receiver in the communication device. Codec and other implementations. Or, if the first communication device is a chip set in a communication device, the communication interface is, for example, an input/output interface of the chip, such as input/output pins, etc., and the communication interface is connected to the radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components.

In a tenth aspect, a communication device (or, referred to as a network device) is provided. The communication device is, for example, the second communication device as described above. The communication device includes a processor (or processing circuit) and a communication interface (or interface circuit), and the communication interface can be used to communicate with other devices or equipment. Optionally, it may also include a memory for storing computer instructions. The processor and the memory are coupled with each other, and are used to implement the methods described in the foregoing second aspect or various optional implementation manners of the second aspect. Alternatively, the second communication device may not include a memory, and the memory may be located outside the second communication device. The processor, the memory, and the communication interface are coupled with each other, and are used to implement the methods described in the foregoing second aspect or various optional implementation manners of the second aspect. For example, when the processor executes the computer instructions stored in the memory, the second communication device is caused to execute the method in the foregoing second aspect or any one of the optional implementation manners. Exemplarily, the second communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a terminal device, such as a first terminal device.

Wherein, if the second communication device is a communication device, the communication interface is realized by, for example, a transceiver (or transmitter and receiver) in the communication device. For example, the transceiver is realized by the antenna, feeder, and Codec and other implementations. Or, if the second communication device is a chip set in a communication device, the communication interface is, for example, an input/output interface of the chip, such as an input/output pin, etc., and the communication interface is connected to a radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components.

In an eleventh aspect, a communication device (or, referred to as a network device) is provided. The communication device is, for example, the third communication device as described above. The communication device includes a processor (or processing circuit) and a communication interface (or interface circuit), and the communication interface can be used to communicate with other devices or equipment. Optionally, it may also include a memory for storing computer instructions. The processor and the memory are coupled with each other, and are used to implement the methods described in the foregoing third aspect or various optional implementation manners of the third aspect. Alternatively, the first communication device may not include a memory, and the memory may be located outside the third communication device. The processor, the memory, and the communication interface are coupled with each other, and are used to implement the third aspect or the methods described in the third aspect or various optional implementation manners. For example, when the processor executes the computer instructions stored in the memory, the first communication device is caused to execute the method in the foregoing third aspect or any one of the optional implementation manners. Exemplarily, the third communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a first device. Exemplarily, the first device is a terminal device. Or, exemplarily, the first device is a terminal device, such as a second terminal device.

Wherein, if the third communication device is a communication device, the communication interface is realized by a transceiver (or a transmitter and a receiver) in the communication device, for example, for example, the transceiver is realized by an antenna, a feeder and a receiver in the communication device. Codec and other implementations. Or, if the third communication device is a chip set in a communication device, the communication interface is, for example, an input/output interface of the chip, such as an input/output pin, etc., and the communication interface is connected to a radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components.

In a twelfth aspect, a communication device (or, referred to as a network device) is provided. The communication device is, for example, the fourth communication device as described above. The communication device includes a processor (or processing circuit) and a communication interface (or interface circuit), and the communication interface can be used to communicate with other devices or equipment. Optionally, it may also include a memory for storing computer instructions. The processor and the memory are coupled with each other, and are used to implement the methods described in the foregoing fourth aspect or various optional implementation manners of the fourth aspect. Alternatively, the fourth communication device may not include a memory, and the memory may be located outside the fourth communication device. The processor, the memory, and the communication interface are coupled with each other, and are used to implement the foregoing fourth aspect or the methods described in various optional implementation manners of the fourth aspect. For example, when the processor executes the computer instructions stored in the memory, the fourth communication device is caused to execute the method in the foregoing fourth aspect or any one of the optional implementation manners. Exemplarily, the fourth communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a network device. Exemplarily, the network device is a core network device, such as a first core network device, and the first core network device is, for example, AMF or SMF.

Wherein, if the fourth communication device is a communication device, the communication interface is realized by, for example, a transceiver (or a transmitter and a receiver) in the communication device. For example, the transceiver is realized by the antenna, feeder, and Codec and other implementations. Or, if the fourth communication device is a chip set in a communication device, the communication interface is, for example, an input/output interface of the chip, such as an input/output pin, etc., and the communication interface is connected to a radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components.

In a thirteenth aspect, a first communication system is provided. The first communication system includes the communication device described in the fifth aspect or the communication device described in the ninth aspect, including the communication device described in the sixth aspect or the communication device described in the tenth aspect The communication device, and, includes the communication device according to the seventh aspect or the communication device according to the eleventh aspect.

With reference to the thirteenth aspect, in the first optional implementation manner of the thirteenth aspect, the first communication system may further include the communication device according to the eighth aspect or the communication device according to the twelfth aspect.

In a fourteenth aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer executes the first aspect or the first aspect described above. The method described in any one of the optional implementations of the aspect.

In a fifteenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium is used to store a computer program. When the computer program runs on a computer, the computer executes the second aspect or the second aspect. The method described in any one of the optional implementations of the aspect.

In a sixteenth aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer executes the third aspect or the third aspect. The method described in any one of the optional implementations of the aspect.

In a seventeenth aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer executes the fourth aspect or the fourth aspect. The method described in any one of the optional implementations of the aspect.

In an eighteenth aspect, a computer program product containing instructions is provided, the computer program product is used to store a computer program, and when the computer program runs on a computer, the computer executes the first aspect or the first aspect. Any one of the methods described in the optional implementation mode.

In a nineteenth aspect, a computer program product containing instructions is provided. The computer program product is used to store a computer program. When the computer program runs on a computer, the computer executes the second aspect or the second aspect. Any one of the methods described in the optional implementation mode.

In a twentieth aspect, a computer program product containing instructions is provided. The computer program product is used to store a computer program. When the computer program runs on a computer, the computer executes the third aspect or the third aspect. Any one of the methods described in the optional implementation mode.

In a twenty-first aspect, a computer program product containing instructions is provided, the computer program product is used to store a computer program, and when the computer program runs on a computer, the computer executes the fourth aspect or the fourth aspect. The method described in any one of the optional implementations of the aspect.

In the embodiment of the present application, the access network device where the first terminal device is located can determine that the first terminal device is a relay terminal device and can determine that the second terminal device is a remote terminal device. That is, in this way, the network of the relay terminal device can perceive the remote terminal device.

Description of the drawings

Figure 1A is a schematic diagram of a remote terminal device in an IC state in an L3 relay scenario;

Figure 1B is a schematic diagram of a remote terminal device in an OOC state in an L3 relay scenario;

Figure 2 is a schematic diagram of a user plane protocol stack in L3 relay technology;

Figure 3 is a relay flow chart in L3 relay technology;

Figure 4A is a schematic diagram of a control plane protocol stack under L2 relay technology;

Figure 4B is a schematic diagram of a user plane protocol stack under L2 relay technology;

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

FIG. 6 is a schematic diagram of the protocol stack of the control plane provided by the first communication method provided by an embodiment of the application;

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

FIG. 8 is a flowchart of a branch implementation manner of the second communication method provided by an embodiment of this application;

9 is a schematic diagram of a protocol stack of a control plane provided by the first communication method provided by an embodiment of this application;

FIG. 10 is a flowchart of relaying using a branch implementation of the second communication method provided by an embodiment of the present application; FIG.

FIG. 11 is a flowchart of another branch implementation manner of the second communication method provided by an embodiment of this application;

FIG. 12 is a flowchart of relaying using another branch implementation of the second communication method provided by an embodiment of the present application; FIG.

FIG. 13 is a schematic block diagram of an access network device provided by an embodiment of this application;

FIG. 14 is a schematic block diagram of a first terminal device according to an embodiment of this application;

FIG. 15 is a schematic block diagram of a second terminal device according to an embodiment of this application;

FIG. 16 is a schematic block diagram of a core network device provided by an embodiment of this application;

FIG. 17 is a schematic block diagram of a communication device provided by an embodiment of this application;

FIG. 18 is another schematic block diagram of a communication device according to an embodiment of this application;

FIG. 19 is still another schematic block diagram of a communication device according to an embodiment of this application;

FIG. 20 is another schematic block diagram of a communication device according to an embodiment of this application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

Hereinafter, some terms in the embodiments of the present application will be explained to facilitate the understanding of those skilled in the art.

1) Terminal devices, including devices that provide users with voice and/or data connectivity, specifically, include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity Sexual equipment. For example, it may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN. The terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, vehicle to everything (V2X) terminal equipment , Machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit, subscriber unit station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user Agent (user agent), or user equipment (user device), etc. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, mobile devices with built-in computers, and so on. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants, PDA), and other equipment. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.

As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The various terminal devices described above, if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be regarded as vehicle-mounted terminal equipment, for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU). ).

In the embodiment of the present application, the terminal device may also include a relay. Or it can be understood that everything that can communicate with the base station can be regarded as a terminal device.

In the embodiments of the present application, the device for realizing the function of the terminal device may be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided in the embodiments of the present application, the device used to implement the functions of the terminal is a terminal device as an example to describe the technical solutions provided in the embodiments of the present application.

2) Network equipment, including, for example, access network (AN) equipment, such as a base station (e.g., access point), which may refer to equipment that communicates with wireless terminal equipment through one or more cells on the air interface in the access network Or, for example, a network device in a vehicle-to-everything (V2X) technology is a roadside unit (RSU). The base station can be used to convert the received air frame and IP packet to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network can include the IP network. The RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications. The network equipment can also coordinate the attribute management of the air interface. For example, the network equipment may include the evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE system or the long term evolution-advanced (LTE-A), or may also include the fifth-generation mobile Communication technology (the 5th generation, 5G) NR system (also referred to as NR system) next generation node B (next generation node B, gNB) or may also include cloud radio access network (cloud radio access network, Cloud RAN) system Centralized unit (CU) and distributed unit (DU) in, the embodiment of the present application is not limited.

The network equipment may also include core network equipment. The core network equipment includes, for example, access and mobility management functions (AMF), session management functions (SMF), or user plane functions in the 5G system. function, UPF), etc., or include mobility management entity (mobility management entity, MME) in the 4G system.

In the embodiments of the present application, the device used to implement the function of the network device may be a network device, or a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device. In the technical solutions provided in the embodiments of the present application, the device used to implement the functions of the network equipment is a network device as an example to describe the technical solutions provided in the embodiments of the present application.

3) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .

And, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects. , Priority or importance, etc. For example, the first message and the second message are only for distinguishing different messages, but do not indicate the difference in information size, content, sending order, priority, or importance of the two messages.

The foregoing introduces some terms and concepts involved in the embodiments of the present application, and the technical features involved in the embodiments of the present application are introduced below.

The technology supported by the current standard for transmitting and receiving to the network through remote terminal equipment is called layer 3 (L3) relay technology. The reason is that the relay data is forwarded through the Internet Protocol (IP) layer, that is, the data of the remote terminal device is parsed by the relay terminal device to the IP layer, and then the relay terminal device is forwarded to the base station. For the L3 relay technology introduced by the long term evolution (LTE) system, the remote terminal equipment is transparent to the network of the relay terminal equipment.

On the control plane, when the remote terminal device is in network coverage (in coverage, IC), the remote terminal device will independently access the network of the remote terminal device through the Uu port. The network of the remote terminal device can control the communication configuration and the allocation of communication resources on the sidelink (SL) between the remote terminal device and the relay terminal device, for example, the resource pool on the SL can be configured, or Carry out real-time resource scheduling. For the case where the remote terminal device is in the IC state, refer to Figure 1A. Figure 1A includes base station 1, terminal equipment 1, terminal equipment 2, base station 2, and core network equipment. Base station 1 is the base station accessed by terminal equipment 1, base station 2 is the base station accessed by terminal equipment 2, and the core network equipment is base station 2. In the core network equipment, terminal equipment 2 is a relay terminal equipment, and terminal equipment 1 is a remote terminal equipment.

When the remote terminal device is out of coverage (OOC), the remote terminal device cannot access the network of the remote terminal device through the Uu port. Therefore, the remote terminal device will use the pre-configured The resource communicates with the relay terminal device on the SL. At this time, the remote terminal device will not be able to accept network control. For the case where the remote terminal device is in the OOC state, refer to Figure 1B. Figure 1B includes terminal equipment 1, terminal equipment 2, base station 2, and core network equipment. Base station 2 is the base station accessed by terminal equipment 2, core network equipment is the core network equipment of base station 2, and terminal equipment 2 is relay terminal equipment. The terminal device 1 is a remote terminal device. It can be seen that the difference between Fig. 1B and Fig. 1A is that in Fig. 1A, the terminal device 1 is in the coverage area of the base station 1, while in Fig. 1B, the terminal device 1 is not in the coverage area of the base station 1, or the terminal device 1 It cannot be directly served by the base station 1.

In the current discussion, UE2NW relay can be used in commercial scenarios. For example, it is currently proposed to use the UE2NW relay architecture of L3, that is, on the control plane, the remote terminal equipment is not perceived by the network, and on the user plane, the remote terminal equipment follows LTE The UE2NW relay of the system performs IP layer relay. Compared with the architecture of the LTE system, in the newly discussed architecture, a service data adaptation protocol (SDAP) layer will be added to the user plane. The SDAP layer can be used to control the quality of service (QoS) flow ( Flow) is mapped to a layer of a data radio bearer (DRB). Refer to Figure 2 for the overall user plane protocol stack. It can be seen from Figure 2 that the data packet of the remote terminal device starts to be transmitted from the IP layer of the remote terminal device and reaches the IP layer of the relay terminal device. The relay terminal device parses the data packet to obtain the address of the remote terminal device. , The relay terminal device then forwards the data packet to the base station. The relay terminal equipment can identify which data packets are from the remote terminal equipment, but for the network (base station or core network equipment), it only receives the data packet from the relay terminal equipment and does not know some of the data. The packet actually comes from the remote terminal device, that is, the network does not perceive the existence of the remote terminal device. The following describes the relay process of user plane data. Among them, L1 in Figure 2 represents the physical layer, SDAP represents the service data adaptation protocol (service data adaptation protocol, SDAP) layer, UDP represents the user datagram protocol (user datagram protocol, UDP), and GTP-U represents the general wireless packet service Tunnel protocol (general packet radio service tunnel protocol) user plane.

The relay terminal device will assign an IP address to the remote terminal device. The IP address may be the IP address of the relay terminal device registered with the base station, or it may be a local address of the relay terminal device, such as IP address A. In addition, the relay terminal device also maintains an IP address for the remote terminal device. The IP address is the IP address of the relay terminal device registered with the base station, for example, it is called IP address B. IP address A and IP address B can be the same IP address, or they can be different IP addresses. In addition, the IP address B is assigned to the remote device by the relay terminal device, and is dedicated to transmitting data packets corresponding to the remote terminal device. If the relay terminal device wants to send the data packet of the relay terminal device to the network, or receive the data packet corresponding to the relay terminal device from the network, it will use the relay terminal device to register to the other IP address of the base station instead of using it. IP address B, so that the relay terminal device can distinguish the data of the relay terminal device from the data of the remote terminal device. For example, referring to Figure 3, the relay terminal device and the remote terminal device transmit data packets through the IP channel 1 corresponding to IP address A; when the relay terminal device sends the data packet of the remote terminal device to the network, it uses the IP address The IP channel 2 corresponding to B is sent. When the relay terminal device receives the data packet from the remote terminal device of the network, it is also received through the IP channel 2 corresponding to the IP address B; the relay terminal device is sending the relay terminal device to the network When the data packet is sent through the IP channel 3 corresponding to the IP address C, when the relay terminal device receives the data packet from the relay terminal device of the network, it is also received through the IP channel 3 corresponding to the IP address C. The IP address C is also the address where the relay terminal device is registered to the network, but it is a different IP address from the IP address B. The IP address may correspond to an IPv4 combined port number (that is, IPv4 address + port number), or may be an IPv6 address. In addition, the relay terminal equipment and the remote terminal equipment communicate through SLRB; the relay terminal equipment sends data packets to the base station and receives data packets from the base station through the DRB of the relay terminal equipment; and the base station communicates to the core network equipment ( For example, the UPF shown in FIG. 3 sends data packets and receives data packets from the core network device through a protocol data unit (PDU) session of the relay terminal device.

For uplink transmission, when the remote terminal device sends a data packet to the relay terminal device, it uses IP address A as the source IP address and the IP address of the service server as the target address, passing through the relay terminal device The sidelink DRB (SLRB) sends the data packet to the relay terminal device. The service corresponding to the service server is the service to which the data packet belongs. After the relay terminal device receives the data packet, there will be the following two possible processing methods. Which processing method is used depends on the implementation of the relay terminal device:

1. IP address A and IP address B are the same IP address, that is, the IP address assigned to the remote terminal device is the IP address registered by the relay terminal device on the network, then the relay terminal device can send the data packet To the base station

2. IP address A and IP address B are different IP addresses, that is, the IP address assigned to the remote terminal device is the local IP address of the relay terminal device, or the IP address is not registered on the network. Then the relay terminal device needs to replace the source IP address of the data packet with the IP address registered by the relay terminal device on the network (for example, IP address B), and then send the data packet with the source IP address replaced to the network.

For downlink transmission, when the remote terminal device registers to the network through the relay terminal device, the relay terminal device will fill in the IP address B used to receive the information corresponding to the remote terminal device. When the network has a data packet sent to the remote terminal device, it will be sent to the relay terminal device through the IP address B. After the relay terminal device receives the data packet, there will be the following two possible processing methods. Which processing method is used depends on the implementation of the relay terminal device:

1. IP address A and IP address B are the same IP address, that is, the IP address assigned to the remote terminal device is the IP address registered by the relay terminal device on the network, then the relay terminal device can send the data packet to Remote terminal equipment;

2. IP address A and IP address B are different IP addresses, that is, the IP address assigned to the remote terminal device is the local IP address of the relay terminal device, or the IP address is not registered on the network. Then the relay terminal device needs to replace the target IP address of the data packet with the local IP address of the remote terminal device, and then send the data packet that replaces the destination address to the remote terminal device.

It can be seen that the network where the relay terminal device is located is not aware of the remote terminal device, and it does not know the existence of the remote terminal device.

Since the network where the relay terminal device is located cannot perceive the remote terminal device, some problems may occur. For example, if the remote terminal device is outside the coverage of the network (such as base station 1 shown in Figure 1A), the network of the remote terminal device cannot allocate resources for the remote terminal device, and the remote terminal device can only use Pre-configured resources. However, the pre-configured resources are generally limited, and the data transmission of the remote terminal device will be limited by the pre-configured resources, which may result in low data transmission quality, and may even fail to transmit due to insufficient pre-configured resources.

Compared with the L3 relay technology introduced above, another possible form of relay is layer 2 (L2) relay. The L2 relay avoids the problem that the remote terminal equipment in the L3 relay is invisible to the radio access network (RAN). In the L2 relay technology, the remote terminal equipment establishes an end-to-end radio resource control (RRC) connection with the base station, so the remote terminal equipment is visible to the base station.

In order to better understand the L2 relay technology, please refer to Figure 4A and Figure 4B. Fig. 4A is a schematic diagram of a control plane protocol stack under L2 relay, and Fig. 4B is a schematic diagram of a user plane protocol stack under L2 relay technology. In Figure 4A and Figure 4B, L1 represents the physical layer, L2 represents the MAC layer, SCTP represents the stream control transmission protocol (SCTP), and S1-AP represents the S1 application protocol (S1 application protocol, S1-AP), This protocol can be connected to the main functions of the S1 interface.

Compared with the L3 relay technology, the L2 relay technology increases the connection between the remote terminal equipment and the network at the control plane, and also adds an adaptation layer on the user plane. The relay terminal equipment receives the remote terminal equipment to be forwarded to the network. The data packet can be routed to the base station without being processed by the packet data convergence protocol (PDCP) layer. The base station performs PDCP encryption and decryption processing based on the connection established between the remote terminal equipment and the base station. And the core network equipment can also see the remote terminal equipment.

In the L2 relay technology, the remote terminal device needs to establish an end-to-end RRC connection with the base station through the relay terminal device. That is, in order to perform data transmission, the remote terminal device needs to establish an RRC connection with the base station through the relay terminal device after the relay terminal device establishes an RRC connection with the base station.

At present, the PC5-RRC concept is introduced in the vehicle to everything (V2X) system of NR. When the L2 relay technology is extended to the NR system, the connection establishment of the L2 relay requires remote terminal equipment and relay terminal equipment. The PC5-S connection is established on the SL first, and the PC5-S connection is established, which is equivalent to the establishment of the PC5-RRC connection. Then the relay terminal equipment and the base station establish an RRC connection with the Uu port. Then the remote terminal device initiates the RRC connection establishment process with the base station through the PC5-RRC connection with the relay terminal device. That is, in order to communicate between the remote terminal equipment and the network, it is necessary to establish the remote terminal equipment-relay terminal equipment, the relay terminal equipment-base station, and the remote terminal equipment-base station. These three RRC connections, the process is relatively complicated.

In view of this, the technical solutions of the embodiments of the present application are provided. In the embodiment of the present application, the network of the relay terminal device can receive the first message from the relay terminal device (for example, the first terminal device), and the remote terminal device (for example, the second terminal device) can be obtained according to the first message. ), and the relay indication information can be obtained, so that the network can determine that the first terminal device is a relay terminal device and can determine that the second terminal device is a remote terminal device. That is, in this way, the network of the relay terminal device can perceive the remote terminal device. For example, if the remote terminal device is outside the coverage of the network (here, the network of the remote terminal device), the network of the remote terminal device cannot allocate resources for the remote terminal device. However, the network of the relay terminal device can allocate resources to the remote terminal device, so that the remote terminal device has a wider choice of resources when sending data, and when allocating resources, it can also be allocated according to the current network situation, which is helpful To improve the data transmission quality and transmission success rate of remote terminal equipment. Moreover, the network of the relay terminal device can perceive the remote terminal device according to the first message, and there is no need for the remote terminal device to re-establish an RRC connection with the network, thereby reducing the communication process, reducing the delay of the relay process, and also Save signaling overhead.

The technical solutions provided in the embodiments of this application can be applied to the 4th generation (4G) mobile communication technology (the 4th generation, 4G) system, such as the LTE system, or can be applied to the 5G system, such as the NR system, or can also be applied to the next generation Mobile communication systems or other similar communication systems are not specifically restricted. In addition, the technical solutions provided by the embodiments of this application can be applied to device-to-device (D2D) scenarios, such as NR-D2D scenarios, etc., or can be applied to V2X scenarios, such as NR-V2X scenarios, etc., for example, applicable In the Internet of Vehicles, such as V2X, vehicle-to-vehicle (V2V), etc., or can be used in fields such as intelligent driving, assisted driving, or intelligent networked vehicles.

For the application scenario of the embodiment of the present application, refer to FIG. 1A or FIG. 1B.

The following describes the methods provided by the embodiments of the present application with reference to the accompanying drawings.

The embodiment of the present application provides a first communication method. Please refer to FIG. 5, which is a flowchart of this method. In the following introduction process, the application of this method to the network architecture shown in FIG. 1A or FIG. 1B is taken as an example.

For ease of introduction, in the following, the method executed by the network device and the terminal device is taken as an example. This is because the embodiment of the present application is applied to the network architecture shown in FIG. 1A or FIG. 1B as an example. Therefore, the core network device described below may be the core network device in the network architecture shown in FIG. 1A or FIG. In the base station 2 in the network architecture shown in FIG. 1B, the first terminal device described below may be the terminal device 2 in the network architecture shown in FIG. 1A or FIG. 1B, and the second terminal device described below may be The terminal device 1 in the network architecture shown in FIG. 1A or FIG. 1B.

S501. The second terminal device sends a fifth message to the first terminal device, and correspondingly, the first terminal device receives the fifth message from the second terminal device. The fifth message can be used to request to establish a connection with the first terminal device, for example, to establish a PC5-S connection. In addition, the fifth message may also include second relay indication information. The second relay indication information is used to request the first terminal device to be the relay device of the second terminal device, or in other words, to request the first terminal device to be the first terminal device. 2. Terminal equipment provides relay services.

Optionally, S502 may be performed before S501, and the first terminal device and the second terminal device discover or discover each other. Mutual discovery means that the first terminal device and the second terminal device need to know each other's existence first. For example, the first terminal device (or the second terminal device) sends a broadcast message, the broadcast message may indicate the information of the first terminal device (or the second terminal device), and other terminal devices may send the broadcast message to the first terminal device after receiving the broadcast message. The terminal device (or, the second terminal device) replies to the message, for example, the second terminal device (or, the first terminal device) replies to the first terminal device (or, the second terminal device) with a message, which completes the first terminal device And the discovery process of the second terminal device. Alternatively, the first terminal device (or the second terminal device) sends a broadcast message to search for terminal devices that meet the conditions (for example, the broadcast message can indicate one or more services, and the terminal device that can support the service is Conditional terminal device). After receiving the broadcast message, other terminal devices can reply to the first terminal device (or the second terminal device) if the condition is met, such as the second terminal device (or the first terminal device). The device) replies a message to the first terminal device (or the second terminal device), which completes the discovery process of the first terminal device and the second terminal device.

Wherein, discovery means that the first terminal device knows the existence of the second terminal device, but the second terminal device does not know the existence of the first terminal device; or, the second terminal device knows the existence of the first terminal device, but the first terminal device The device is not aware of the existence of the second terminal device. Then, for example, the first terminal device (or the second terminal device) sends a broadcast message, the broadcast message can indicate the information of the first terminal device (or the second terminal device), or the broadcast message can be used to find a terminal that meets the conditions Device (for example, if one or more services are provided, the terminal device that can support the service is the terminal device that meets the conditions). After the second terminal device (or the first terminal device) obtains relevant information, it knows the first The existence of a terminal device (or a second terminal device). However, the discovery process described in S502 cannot allow the first terminal device to establish a connection with the second terminal device.

Or, if the first terminal device and the second terminal device have completed discovery or discovered each other before, S502 need not be performed. Alternatively, the first terminal device and the second terminal device may perform S501 to complete discovery or mutual discovery and establish a connection, and S502 may not be performed. Therefore, S502 is an optional step, which is represented by a dashed line in FIG. 5. For example, the second terminal device sends a fifth message. The fifth message is, for example, a broadcast message. In addition to requesting the establishment of a connection with the peer device, the fifth message may also request a relay service. Then after receiving the fifth message, the terminal device that can provide the relay service can send a response message to the first terminal device. For example, the second terminal device sends a response message to the first terminal device, which also completes the first terminal device. And the second terminal device's mutual discovery.

S503: If the first terminal device is in the RRC idle state, the first terminal device enters the RRC connected state.

If the first terminal device is in the RRC idle state, according to the communication process of the relay service, the first terminal device needs to enter the RRC connected state. For example, the first terminal device may send a registration request (registration request) message to the core network device (for example, AMF) to enter the RRC connected state. If the first terminal device is in the RRC connected state, there is no need to perform S503. Therefore, S503 is an optional step and does not have to be performed, and is represented by a dotted line in FIG. 5.

S504. The first terminal device sends a first message to the access network device, and correspondingly, the access network device receives the first message from the first terminal device.

The first message may include the identification of the second terminal device and include the first relay indication information. The first relay indication information may indicate that the first terminal device is a relay of the second terminal device, or instruct the first terminal device to perform a relay service between the second terminal device and the access network device. For example, after the first terminal device receives the fifth message from the second terminal device, if the fifth message includes the second relay indication information, the first terminal device may obtain the first relay indication according to the second relay indication information information. Wherein, the first relay indication information and the second relay indication information may be the same information, that is, the first terminal device may take out the second relay indication information included in the fifth message, and then carry it in the first message; or , The first relay indication information and the second relay indication information may also be different information, that is, the first terminal device may generate new relay indication information according to the second relay indication information, that is, the first relay indication information .

The access network device may determine that the first terminal device is a relay device according to the first relay indication information, and the first relay indication information may also be implicitly indicated by whether or not to carry the identifier of the second terminal device. For example, the identifier of the second terminal device includes the SL destination identifier of the second terminal device, or includes the identifier allocated by the first terminal device for the second terminal device, or includes the SL destination identifier of the second terminal device and the first terminal device as the first terminal device. 2. The identification assigned by the terminal device. The SL destination ID of the second terminal device is, for example, the SL destination ID of the second terminal device, and the SL destination ID of the second terminal device is, for example, the layer 2 address of the second terminal device. The first terminal device is an identifier assigned to the second terminal device. The identifier is, for example, an IP address assigned by the first terminal device to the second terminal device. The IP address may be an IP address registered by the first terminal device to the access network device. , Or it may be the local address of the first terminal device, or the identifier assigned by the first terminal device to the second terminal device may also be another terminal device assigned by the first terminal device to the second terminal device that can indicate the second terminal device Logo.

The first message is, for example, a sidelink UE information NR (SUI) message, or may also be other messages.

As an optional implementation manner, the first message may further include information used to indicate that the second terminal device is in the OOC state. When the second terminal device is in the OOC state, the network where the second terminal device is located cannot allocate resources for the second terminal device, etc. In this case, if the second terminal device can access the first terminal device through the first terminal device If the network where the first terminal device is located can perceive the existence of the second terminal device, the network where the second terminal device is located can allocate resources for the first terminal device, etc. Therefore, in this case, the second terminal device The effect of accessing the network through the first terminal device is better. For example, the second terminal device may periodically send a broadcast message via SL. The broadcast message is, for example, a master information block (MIBsidelink). The 1 bit included in the MIBsidelink can indicate that the second terminal device is currently In OOC state or not in OOC state. If MIBsidelink indicates that the second terminal device is currently in OOC state, the first terminal device can send a first message to the access network device so that it can act as a relay device for the second terminal device; and if MIBsidelink indicates that the second terminal device is not currently In the OOC state, the first terminal device may not send the first message to the access network device, that is, if the second terminal device is not currently in the OOC state, then the network where the second terminal device is located can allocate resources for the second terminal device In this case, even if the first terminal device does not act as a relay device for the second terminal device, the communication process of the second terminal device can also use the resources allocated by the network, which is more flexible. Therefore, the first terminal device It may not be used as a relay device for the second terminal device.

Or, in the embodiment of the present application, regardless of whether the second terminal device is currently in the OOC state or not in the OOC state, the first terminal device may send the first message to the access network device to be able to act as a relay for the second terminal device equipment. In this case, the first terminal device can send the first message to the access network device after receiving the MIBsidelink from the second terminal device, or it can also send the first message to the access network device without waiting to receive the MIBsidelink from the second terminal device. The network device sends the first message. In addition, if this is the case, the first message may not include information indicating that the second terminal device is in the OOC state.

S505. The access network device binds the second terminal device to the first terminal device, or in other words, the access network device establishes a binding relationship between the first terminal device and the second terminal device (or referred to as a relay relationship, etc.).

For example, the access network device binds the second terminal device to the first terminal device according to the SUI. Optionally, the access network device may also allocate a cell-radio network temporary identifier (C-RNTI) to the second terminal device.

Among them, S505 is an optional step, which is not required to be performed, and is represented by a dotted line in FIG. 5.

S506: The first terminal device sends a sixth message to the second terminal device, and correspondingly, the second terminal device receives the sixth message from the first terminal device.

The sixth message may indicate that the connection between the first terminal device and the second terminal device has been established. The connection is, for example, a PC5-S connection. The first terminal device and the second terminal device have established a PC5-S connection, which is actually considered to have established a PC5-RRC connection. Therefore, the sixth message can also be considered as indicating the communication between the first terminal device and the second terminal device. The PC5-RRC connection has been established.

Optionally, the sixth message may include an identifier allocated by the first terminal device to the second terminal device. For the introduction of the identifier, refer to the description of S504.

S507. The access network device sends a second message to the first terminal device, and correspondingly, the first terminal device receives the second message from the access network device.

The second message may be used to configure a radio bearer between the first terminal device and the access network device, for example, referred to as a first radio bearer, and the first radio bearer is used to transmit control information corresponding to the second terminal device. That is, if the first terminal device wants to send control information of the second terminal device to the access network device (that is, the second terminal device needs to send information to the control plane of the network through the first terminal device), the first terminal device may The control information is sent to the access network device through the first radio bearer, so that the access network device can determine that this is the control information sent by the second terminal device. If the access network device wants to send control information to the second terminal device (that is, the access network device needs to send control plane information to the second terminal device through the first terminal device), the access network device can also send control information through the first terminal device. The radio bearer sends the control information to the first terminal device, so that the first terminal device sends the control information to the second terminal device. In this embodiment of the application, the information corresponding to the second terminal device refers to the information that the second terminal device is to send to the access network device through the first terminal device, or refers to the information that the access network device is to pass through the first terminal device. The information sent to the second terminal device. Therefore, the information corresponding to the second terminal device can also be referred to as interaction information between the second terminal device and the access network device, or as relay information (that is, through relay Information transmitted by the method) and so on. The first radio bearer is, for example, a signaling radio bearer (SRB), for example, SRB 5, or another SRB between the first terminal device and the access network device.

Among them, S507 is an optional step, which is not required to be performed, and is represented by a dotted line in FIG. 5. That is, the access network device may configure the first radio bearer for the second terminal device, or it may not be necessary to configure the radio bearer between the access network device and the first terminal device specifically for the second terminal device.

S508. The access network device configures a third radio bearer between the first terminal device and the second terminal device.

The third radio bearer is, for example, an SLRB, or a signaling control channel (signaling control channel, SCCH), or an SL-SRB can also be introduced between terminal devices, and the third radio bearer can also be an SL-SRB. It can be understood that the third radio bearer is a newly created radio bearer between the first terminal device and the second terminal device, and is used to transmit interactive information between the second terminal device and the access network device, or it can be understood as the third The radio bearer is used to transmit control information corresponding to the second terminal device, or the third radio bearer is used to transmit relay information. That is, if the second terminal device wants to send the control information of the second terminal device to the access network device through the first terminal device, the second terminal device may send the control information to the first terminal device through the third radio bearer, thereby The first terminal device may send the control information to the access network device. Similarly, if the first terminal device receives control information from the access network device and determines that the control information needs to be sent to the second terminal device, then the first terminal device can also use the third radio bearer to control the control information. Send to the second terminal device.

There are many ways for the access network device to configure the third radio bearer between the first terminal device and the second terminal device, which are described below with examples.

Manner 1: The access network device configures the first terminal device, and the second terminal device configures the second terminal device according to the configuration information of the first terminal device.

For example, the access network device may send the first configuration information to the first terminal device through the second radio bearer between the access network device and the first terminal device, and accordingly, the first terminal device may receive data from the first terminal device through the second radio bearer. The first configuration information of the access network device. The first configuration information is the configuration of the first terminal device corresponding to the third radio bearer, that is, what the access network device sends is the configuration information of the first terminal device. For example, the first configuration information may include a common configuration (for example, referred to as a first common configuration) and a transmission configuration (for example, referred to as a first transmission configuration) of the first terminal device corresponding to the third radio bearer. The second radio bearer is, for example, the SRB 1 or SRB 2 between the access network device and the first terminal device. That is, the second radio bearer is used to transmit information corresponding to the first terminal device. In the embodiment of the present application, the corresponding The information on the first terminal device refers to the information sent by the first terminal device to the access network device, or refers to the information sent by the access network device to the first terminal device. Therefore, the information corresponding to the first terminal device is also It may be called interactive information between the first terminal device and the access network device, or called non-relay information (that is, information transmitted in a non-relay manner), etc. It can be seen that the second radio bearer is not a radio bearer corresponding to the second terminal device, or that the second radio bearer is not dedicated to transmitting relay information, but is a radio bearer between the first terminal device and the access network device. Therefore, the information sent by the access network device through the second radio bearer generally corresponds to the information of the first terminal device.

The first terminal device may generate the reception configuration of the first terminal device corresponding to the third radio bearer (for example, referred to as the first reception configuration) according to the first common configuration. The first terminal device may send information to the second terminal device through the third radio bearer according to the first sending configuration, or may receive information from the second terminal device through the third radio bearer according to the first receiving configuration. In addition, the first terminal device may also send the fourth configuration information to the second terminal device. For example, the first terminal device may send the fourth configuration information to the second terminal device through a PC5-RRC message. Correspondingly, the second terminal device Receive the fourth configuration information from the first terminal device. It may include all of the first configuration information, for example, the fourth configuration information includes the first common configuration and the first sending configuration; or, the fourth configuration information may include part of the first configuration information, for example, the fourth configuration information includes the first configuration information. Public configuration. According to the fourth configuration information, the second terminal device may generate a sending configuration (for example, referred to as a second sending configuration) and a receiving configuration (for example, referred to as a second receiving configuration) of the second terminal device corresponding to the third radio bearer. The second terminal device may send information to the first terminal device through the third radio bearer according to the second sending configuration, or may receive information from the first terminal device through the third radio bearer according to the second receiving configuration.

Manner 2: The access network device is configured with the first terminal device and the second terminal device.

For example, the access network device may send the first configuration information and the second configuration information to the first terminal device through the second radio bearer between the access network device and the first terminal device. Accordingly, the first terminal device may transmit the first configuration information through the first terminal device. The second radio bearer receives the first configuration information and the second configuration information from the access network device. Wherein, because the access network device sends the second configuration information through the second radio bearer, in order to enable the first terminal device to know that the second configuration information corresponds to the second terminal device, the access network device can configure the second configuration information The information is included in the sixth bearer element sent, and the sixth bearer element is, for example, an information element (information element, IE) or container (container) in an RRC message or other messages.

Optionally, the sixth bearer element may include the identity of the second terminal device, or include the C-RNTI allocated by the access network device to the second terminal device, or include the identity of the second terminal device and the access network device as the first terminal device. 2. C-RNTI allocated by terminal equipment. For the content included in the identifier of the second terminal device, refer to the introduction of S504. In short, the content included in the sixth bearer element can indicate that the second configuration information corresponds to the second terminal device, so that the first terminal device can send the second configuration information to the second terminal device.

Alternatively, the sixth bearer element may be dedicated to the transmission of relay information, and the sixth bearer element may be specified through a protocol, for example. If this is the case, the sixth bearer element may also include the identity of the second terminal device and/or the C-RNTI allocated by the access network device to the second terminal device; or, the sixth bearer element may not include the above information, Because the first bearer element is dedicated to the transmission of relay information, the first terminal device can determine, according to the sixth bearer element, that the content included in the sixth bearer element needs to be sent to the second terminal device, without other information instructions.

The first configuration information is the configuration of the first terminal device corresponding to the third radio bearer. For example, the first configuration information may include the common configuration (first common configuration) and sending configuration (first common configuration) of the first terminal device corresponding to the third radio bearer. Send configuration). The second configuration information is the configuration of the second terminal device corresponding to the third radio bearer. For example, the second configuration information may include the common configuration of the second terminal device corresponding to the third radio bearer (for example, referred to as the second common configuration) and sending configuration (Second sending configuration).

The first terminal device may generate a receiving configuration (first receiving configuration) of the first terminal device corresponding to the third radio bearer according to the first common configuration. The first terminal device may send information to the second terminal device through the third radio bearer according to the first sending configuration, or may receive information from the second terminal device through the third radio bearer according to the first receiving configuration. In addition, the first terminal device may also send the second configuration information to the second terminal device, and correspondingly, the second terminal device receives the second configuration information from the first terminal device. For example, the first terminal device may send the second configuration information to the second terminal device through a PC5-RRC message.

The second terminal device may generate the receiving configuration (second receiving configuration) of the second terminal device corresponding to the third radio bearer according to the second common configuration, but the second terminal device does not need to additionally generate the transmitting configuration corresponding to the third radio bearer (second receiving configuration). The second sending configuration) helps to reduce the workload of the second terminal device. The second terminal device may send information to the first terminal device through the third radio bearer according to the second sending configuration, or may receive information from the first terminal device through the third radio bearer according to the second receiving configuration.

Manner 3: The access network device configures the second terminal device, and the first terminal device configures the first terminal device according to the configuration information of the second terminal device.

For example, the access network device may send the second configuration information to the second terminal device through the first radio bearer between the access network device and the first terminal device, and accordingly, the second terminal device may receive data from the second terminal device through the first radio bearer. The second configuration information of the access network device. Specifically, the access network device sends the second configuration information to the first terminal device through the first radio bearer, but because the first radio bearer is used to transmit information corresponding to the second terminal device, the first terminal device is receiving the second configuration information. After the second configuration information, the second configuration information will be sent to the second terminal device. Therefore, it is considered that the access network device has sent the second configuration information to the second terminal device through the first radio bearer. The second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, that is, the configuration information of the second terminal device sent by the access network device. For example, the second configuration information may include a common configuration (for example, referred to as a second common configuration) and a transmission configuration (second transmission configuration) of the second terminal device corresponding to the third radio bearer.

The second terminal device may generate the receiving configuration (second receiving configuration) of the second terminal device corresponding to the third radio bearer according to the second common configuration. The second terminal device may send information to the first terminal device through the third radio bearer according to the second sending configuration, or may receive the information from the first terminal device through the third radio bearer according to the second receiving configuration. In addition, the second terminal device may also send the third configuration information to the first terminal device. For example, the second terminal device may send the third configuration information to the first terminal device through a PC5-RRC message. Correspondingly, the first terminal device Receive the third configuration information from the second terminal device. The third configuration information may include the entire content of the second configuration information, for example, the third configuration information includes the second common configuration and the second transmission configuration; or, the third configuration information may include part of the second configuration information, such as the third configuration. The information includes the second public configuration. The first terminal device may generate the transmission configuration (first transmission configuration) and reception configuration (first reception configuration) of the first terminal device corresponding to the third radio bearer according to the third configuration information. The first terminal device may send information to the second terminal device through the third radio bearer according to the first sending configuration, or may receive information from the second terminal device through the third radio bearer according to the first receiving configuration.

Which way the access network device uses to configure the third radio bearer between the first terminal device and the second terminal device can be set by the access network device itself, or specified by agreement.

Alternatively, the access network device may not need to configure a third radio bearer. For example, there is a preset fourth radio bearer between the first terminal device and the second terminal device, which is used to transmit the communication between the second terminal device and the access network device. Interaction information between them, or understood as, the fourth radio bearer is used to transmit control information corresponding to the second terminal device, or the fourth radio bearer is used to transmit relay information. Therefore, S508 is an optional step and is not necessary to be performed, and is represented by a dashed line in FIG. 5. The fourth radio bearer is, for example, SLRB, or SCCH, or SL-SRB. The fourth radio bearer may be specified by a protocol, for example, a default radio bearer may be specified by the protocol as the fourth radio bearer for transmitting information that needs to be relayed between the relay terminal device and the remote terminal device. The fourth radio bearer specified in the protocol can be fixed, and the configuration of the fourth radio bearer cannot be changed after setting; or, the fourth radio bearer specified in the protocol can also be updateable, and the fourth radio bearer can be updated after setting. Configuration information, etc.

Through the above S501~S506, a PC5-RRC connection is established between the first terminal device and the second terminal device, and the first terminal device also enters the RRC connection state, which is equivalent to that the first terminal device is also connected to the access network device. The RRC connection is established, and the access network device can perceive the existence of the second terminal device through the first message, and there is no need for the second terminal device to establish an RRC connection with the access network device, which helps to reduce the flow of the relay process and save signaling Overhead. In addition, through S507 and S508, corresponding radio bearers can be configured, so that the first terminal device can better perform relay work.

Subsequently, if the second terminal device and the access network device need to transmit information, they can be transmitted through the corresponding radio bearer configured in the foregoing steps, which will be described below.

S509. The second terminal device sends a third message to the first terminal device, and correspondingly, the first terminal device receives the third message from the second terminal device.

For example, the second terminal device may send a third message to the first terminal device through the fourth radio bearer, and the first terminal device receives the third message from the second terminal device through the fourth radio bearer; or, the second terminal device The terminal device may send a third message to the first terminal device through the third radio bearer, and the first terminal device receives the third message from the second terminal device through the third radio bearer; or the second terminal device may also When the third message is sent to the first terminal device through the fifth radio bearer, the first terminal device receives the third message from the second terminal device through the fifth radio bearer. The fifth radio bearer is, for example, a radio bearer between the first terminal device and the second terminal device, and is not dedicated to transmitting relay information. For example, the fifth radio bearer is an SCCH between the first terminal device and the second terminal device, and the logical channel ID (logic channel ID, LCID) of the SCCH is 1, 2, or 3, for example. If the second terminal device sends a third message that needs to be relayed to the first terminal device through the fifth radio bearer, then in order for the first terminal device to know that the third message needs to be forwarded to the access network device, the second terminal device can send The third message is included in the fourth bearer element and is sent to the first terminal device through the fifth radio bearer. The fourth bearer element may be used to transmit relay information. For example, the fourth bearer element may be specified through a protocol. The fourth bearer element is, for example, IE or container in the PC5-RRC message.

Wherein, the fourth bearer element includes the third message, and it can also be understood that the fourth bearer element includes information included in the third message. For example, the third message includes the first information, and the first information may be all or part of the content included in the third message. Then the fourth bearer element may include the first information, which is equivalent to that the fourth bearer element includes the third message.

S510: The first terminal device sends a third message to the access network device, and correspondingly, the access network device receives the third message from the first terminal device. Or, because the third message is actually from the second terminal device, it can also be considered that the access network device receives the third message from the second terminal device.

If the first terminal device receives the third message from the second terminal device through the fourth radio bearer, the first terminal device can determine that the third message needs to be forwarded to the access network device according to the fourth radio bearer. Or, if the first terminal device receives the third message from the second terminal device through the third radio bearer, the first terminal device may determine that the third message needs to be forwarded to the access network device according to the fourth radio bearer. Or, if the first terminal device receives the third message from the second terminal device through the fourth bearer element of the fifth radio bearer, the first terminal device can determine that the third message needs to be forwarded to the access network based on the fourth bearer element equipment. Wherein, if the first terminal device receives the third message from the second terminal device through the fourth bearer element of the fifth radio bearer, and the fourth bearer element may include the first information, then the access network device may transfer the first information Forward to the access network equipment. The first information is the content included in the third message. Therefore, it can also be considered that the first terminal device forwards the third message to the access network device.

For example, if S507 is executed, the first terminal device may send a third message to the access network device through the first radio bearer. The first radio bearer is used to transmit relay information, so the access network device can determine according to the first radio bearer that the third message is a message sent by the second terminal device.

Alternatively, if S507 is executed or S507 is not executed, the first terminal device may also send the third message to the access network device through the second radio bearer. The second radio bearer is, for example, the SRB 1 or SRB 2 between the access network device and the first terminal device, that is, the second radio bearer is not a radio bearer corresponding to the second terminal device, or the second radio bearer is not dedicated to Transmit relay information. Then, if the first terminal device sends a third message to the access network device through the second radio bearer, in order to enable the access network device to determine that the third message is a message from the second terminal device, the first terminal device may send the third message to the access network device. The message is included in the first bearer element of the second radio bearer and sent, and the access network device can determine that the third message comes from the second terminal device according to the first bearer element. The first bearer element is, for example, an IE or a container in the RRC message. Wherein, the first bearer element includes the third message, and it can also be understood that the first bearer element includes information included in the third message. For example, the first bearer element may include the first information, which is equivalent to that the first bearer element includes the third message.

Optionally, the first bearer element may also include the identity of the second terminal device, or include the C-RNTI allocated by the access network device to the second terminal device, or include the identity of the second terminal device and the access network device as the first terminal device. 2. C-RNTI allocated by terminal equipment. For the content included in the identifier of the second terminal device, refer to the introduction of S504. In short, the content included in the first bearer element may indicate that the third message corresponds to the second terminal device, so that the access network device can determine that the third message comes from the second terminal device.

Alternatively, the first bearer element may be dedicated to the transmission of relay information (for example, the transmission of uplink relay information, that is, the information sent by the second terminal device to the access network device), for example, the first bearer element may be specified by a protocol. If this is the case, the first bearer element may also include the identity of the second terminal device and/or the C-RNTI allocated by the access network device to the second terminal device; or, the first bearer element may not include the above information, Because the first bearer element is dedicated to the transmission of relay information, the access network device can determine, according to the first bearer element, that the content included in the first bearer element comes from the second terminal device, and no indication of other information is required.

S511. The access network device sends the first resource information to the first terminal device, and correspondingly, the first terminal device receives the first resource information from the access network device.

If the third message is used to request resource allocation, then S511 can be executed, and if the third message is not used to request resource allocation, S511 need not be executed.

If the third message is used to request allocation of resources, the access network device may allocate resources to the second terminal device after receiving the third message, for example, allocate the first resource. Then the access network device can send the information of the first resource to the second terminal device. Of course, the access network device needs to send the information of the first resource to the first terminal device, and the first terminal device forwards the information of the first resource to the second terminal device. The information of the first resource can indicate the first resource. For example, the information of the first resource may include time-frequency location information of the first resource, and the like.

For example, if the access network device sends the first resource information to the first terminal device through the first radio bearer, the first terminal device receives the first resource information from the access network device through the first radio bearer. Because the first radio bearer is used to transmit information corresponding to the second terminal device, or to transmit relay information, the first terminal device, after receiving the information of the first resource, will send the information of the first resource to The second terminal device.

For another example, if the access network device sends the first resource information to the first terminal device through the second radio bearer, the first terminal device receives the first resource information from the access network device through the second radio bearer. The second radio bearer is not a radio bearer corresponding to the second terminal device, or in other words, the second radio bearer is not dedicated to transmitting relay information. Then, if the access network device sends information about the first resource to the first terminal device through the second radio bearer, in order for the first terminal device to determine that the information about the first resource is information that needs to be sent to the second terminal device, access The network device may include the information of the first resource in the second bearer element of the second radio bearer to send, and the first terminal device can determine that the information of the first resource needs to be sent to the second terminal device according to the second bearer element. The second bearer element is, for example, an IE or a container in the RRC message.

Optionally, the second bearer element may also include the identity of the second terminal device, or include the C-RNTI allocated by the access network device to the second terminal device, or include the identity of the second terminal device and the access network device as the first terminal device. 2. C-RNTI allocated by terminal equipment. For the content included in the identifier of the second terminal device, refer to the introduction of S504. In short, the content included in the second bearer element can indicate that the information of the first resource corresponds to the second terminal device, so that the first terminal device can determine that the information of the first resource needs to be sent to the second terminal device.

Alternatively, the second bearer element may be dedicated to the transmission of relay information (for example, transmission of downlink relay information, that is, information sent by the access network device to the second terminal device), for example, the second bearer element may be specified through a protocol. If this is the case, the second bearer element may also include the identity of the second terminal device and/or the C-RNTI allocated by the access network device to the second terminal device; or, the second bearer element may not include the above information, Because the second bearer element is dedicated to the transmission of relay information, the first terminal device can determine, according to the second bearer element, that the content included in the second bearer element needs to be sent to the second terminal device, without other information instructions.

S512: The first terminal device sends the information of the first resource to the second terminal device, and correspondingly, the second terminal device receives the information of the first resource from the first terminal device.

For example, the first terminal device may send the first resource information to the second terminal device through the fourth radio bearer, and the second terminal device receives the first resource information from the first terminal device through the fourth radio bearer; Alternatively, the first terminal device may send the first resource information to the second terminal device through the third radio bearer, and the second terminal device receives the first resource information from the first terminal device through the third radio bearer; or A terminal device may also send the information of the first resource to the second terminal device through the fifth radio bearer, and the second terminal device receives the information of the first resource from the first terminal device through the fifth radio bearer. The fifth radio bearer is not dedicated to transmitting relay information. If the first terminal device sends the information of the first resource that needs to be relayed to the second terminal device through the fifth radio bearer, then in order for the second terminal device to be able to determine that the information of the first resource comes from the access network device, the first terminal device The information of the first resource may be included in the fourth bearer element and sent to the second terminal device through the fifth radio bearer. The fourth bearer element may be used to transmit relay information. For example, the fourth bearer element may be specified through a protocol. The fourth bearer element is, for example, IE or container in the PC5-RRC message.

Through S509~S512, the access network equipment can allocate resources to the remote terminal equipment, so that the remote terminal equipment does not need to rely on pre-configured resources when transmitting data. The resource selection range is larger, which is more conducive to the use of commercial scenarios. . Among them, S509 to S512 are optional steps, which are not necessary to be performed, and are represented by dashed lines in FIG. 5.

In addition, if the first radio bearer between the first terminal device and the access network device is configured, the access network device may also reconfigure the first radio bearer, or update the configuration of the first radio bearer. The process of reconfiguring the first radio bearer or updating the configuration of the first radio bearer is similar to the process of configuring the first radio bearer for the first time described above. In the same way, if the third radio bearer between the first terminal device and the second terminal device is configured, the access network device can also reconfigure the third radio bearer or update the configuration of the third radio bearer, etc., and reconfigure the third radio bearer. The process of radio bearer or updating the configuration of the third radio bearer is similar to the process of configuring the third radio bearer for the first time described above.

In summary, on the control plane, the second terminal device does not need to initiate the RRC connection establishment process with the access network device. The second terminal device and the access network device can pass through the PC5-between the second terminal device and the first terminal device. The RRC connection and the RRC connection between the first terminal device and the access network device perform signaling interaction. For example, refer to FIG. 6 for the protocol stack of the control plane. Since the second terminal device does not need to establish an RRC connection with the access network device, the procedure for establishing a relay connection is reduced, the signaling overhead is reduced, and the delay of the relay process is also reduced.

The access network device can control the resource allocation of the second terminal device through the first terminal device. For example, when the second terminal device is in the OOC state, the communication of the second terminal device on the SL can be allocated by the access network device. Ensure better communication quality. Or, if the second terminal device is in the IC state, a unified access network device can also be used to control the resources and configuration of the second terminal device and the first terminal device, which facilitates unified configuration and resource optimization.

The above steps describe the relay process of the control plane. The following describes the relay process of user plane data in the embodiment of the present application.

The embodiments of the present application have already introduced that the first terminal device can assign an identifier to the second terminal device. For example, an identifier assigned to the second terminal device is an IP address, and the IP address may be the first terminal device registered to the access network. The IP address of the device, or it may be a local address of the first terminal device. Taking the allocation of an IP address by the first terminal device to the second terminal device as an example, the IP address is referred to as IP address 1, for example. In addition, the first terminal device may also maintain an IP address for the second terminal device. The IP address is an IP address registered by the first terminal device to the access network device, for example, it is called IP address 2. IP address 1 and IP address 2 can be the same IP address, or they can be different IP addresses. In addition, the IP address 2 is allocated by the first terminal device to the second terminal device, and is dedicated to transmitting data packets corresponding to the second terminal device, or in other words, dedicated to transmitting relay information. If the first terminal device wants to send a data packet of the first terminal device to the access network device, or receive a data packet corresponding to the first terminal device from the access network device, it will use the first terminal device to register to the access network The other IP address of the device does not use IP address 2, so that the first terminal device can distinguish the data of the first terminal device from the data of the second terminal device. For example, referring to Figure 3, the first terminal device and the second terminal device transmit data packets through the IP channel 1 corresponding to IP address 1. When the first terminal device sends the data packet of the second terminal device to the access network device , Sent through IP channel 2 corresponding to IP address 2. When the first terminal device receives a data packet from the second terminal device of the access network device, it also receives it through IP channel 2 corresponding to IP address 2. The first terminal device is in When sending the data packet of the first terminal device to the access network device, it is sent through the IP channel 3 corresponding to the IP address 3. When the first terminal device receives the data packet from the first terminal device of the access network device, it also uses IP IP channel 3 corresponding to address 3 is received. IP address 3 is also the address registered by the first terminal device to the access network device, but it is a different IP address from IP address 2. In addition, the first terminal device and the second terminal device communicate through SLRB; the first terminal device sends data packets to the access network device and receives data packets from the access network device through the DRB of the first terminal device; and The access network device sends data packets to the core network device (for example, the UPF shown in FIG. 3) and receives data packets from the core network device through a PDU session of the first terminal device.

For uplink transmission, when the second terminal device sends a data packet to the first terminal device, it uses IP address 1 as the source IP address and the IP address of the service server as the target address. The data packet is sent to the first terminal device. After the first terminal device receives the data packet, there will be the following two possible processing methods. Which processing method is used depends on the implementation of the first terminal device:

1. IP address 1 and IP address 2 are the same IP address, that is, the IP address assigned to the second terminal device is the IP address registered by the first terminal device in the access network device, then the first terminal device can The data packet is sent to the access network device;

2. IP address 1 and IP address 2 are different IP addresses, that is, the IP address assigned to the second terminal device is the local IP address of the first terminal device, or the IP address is not registered with the access network device. Then the first terminal device needs to replace the source IP address of the data packet with the IP address registered by the first terminal device on the access network device (for example, IP address 2), and then send the data after replacing the source IP address to the access network device Bag.

For downlink transmission, when the second terminal device performs application registration with the access network device through the first terminal device, the first terminal device fills the IP address used to receive information corresponding to the second terminal device as IP address 2. When the access network device has a data packet sent to the second terminal device, it will fill in the target address of the data packet as IP address 2, and send the data packet to the first terminal device. After the first terminal device receives the data packet, there will be the following two possible processing methods. Which processing method is used depends on the implementation of the first terminal device:

1. IP address 1 and IP address 2 are the same IP address, that is, the IP address assigned to the second terminal device is the IP address registered by the first terminal device in the access network device, then the first terminal device can use the data The packet is sent to the second terminal device;

2. IP address 1 and IP address 2 are different IP addresses, that is, the IP address assigned to the second terminal device is the local IP address of the first terminal device, or the IP address is not registered with the access network device. Then the first terminal device needs to replace the destination IP address of the data packet with the local IP address of the second terminal device, and then send the data packet replacing the destination address to the second terminal device.

Among them, the relay of data also requires data bearers on two segments. For example, before data transmission, the first data bearer between the first terminal device and the second terminal device can be established, and the first terminal device and access can be established. The second data bearer between network devices, the first data bearer or the second data bearer is used to transmit data corresponding to the second terminal device. Wherein, the uplink data sent by the second terminal device or the downlink data sent to the second terminal device is the data bearer used by the Uu port (that is, between the first terminal device and the access network device). The data bearer between the terminal device and the access network device, that is, the second data bearer may not need to be specially established, but the third data bearer may be used to transmit between the first terminal device and the access network device corresponding to the second data bearer. The data of the terminal device (or, referred to as relay data). The third data bearer is a data bearer used to transmit data corresponding to the first terminal device, and it can be understood that the third data bearer is not dedicated to the transmission of relay data. In addition, the IP address 2 is carried on the header of each data packet corresponding to the second terminal device, even if the transmission of relay data (for example, the data packet corresponding to the second terminal device) uses the third data bearer, the first terminal The device can also determine that the relay data is data corresponding to the second terminal device according to the IP address 2 carried in the header of the data packet submitted from the third data bearer PDCP to the IP layer.

In the embodiment of the present application, the network of the first terminal device can receive the first message from the first terminal device, can obtain the identity of the second terminal device according to the first message, and can obtain relay indication information, so that the network can It is determined that the first terminal device is a relay terminal device, and it can be determined that the second terminal device is a remote terminal device. That is, in this way, the network of the relay terminal device can perceive the remote terminal device. For example, if the remote terminal device is outside the coverage of the network (here, the network of the remote terminal device), the network of the remote terminal device cannot allocate resources for the remote terminal device. However, the network of the relay terminal device can allocate resources to the remote terminal device, so that the remote terminal device has a wider choice of resources when sending data, and when allocating resources, it can also be allocated according to the current network situation, which is helpful To improve the data transmission quality and transmission success rate of remote terminal equipment.

In order to solve the same technical problem as the embodiment shown in FIG. 5, the embodiment of the present application provides a second communication method. Please refer to Figure 7 for a flowchart of this method. In the following introduction process, the application of this method to the network architecture shown in FIG. 1A or FIG. 1B is taken as an example.

For ease of introduction, in the following, the method executed by the network device and the terminal device is taken as an example. This is because the embodiment of the present application is applied to the network architecture shown in FIG. 1A or FIG. 1B as an example. Therefore, the core network device described below may be the core network device in the network architecture shown in FIG. 1A or FIG. In the base station 2 in the network architecture shown in FIG. 1B, the first terminal device described below may be the terminal device 2 in the network architecture shown in FIG. 1A or FIG. 1B, and the second terminal device described below may be The terminal device 1 in the network architecture shown in FIG. 1A or FIG. 1B.

S701. The second terminal device sends a fifth message to the first terminal device, and correspondingly, the first terminal device receives the fifth message from the second terminal device. The fifth message can be used to request to establish a connection with the first terminal device, for example, to establish a PC5-S connection. In addition, the fifth message may also include second relay indication information. The second relay indication information is used to request the first terminal device to be the relay device of the second terminal device, or in other words, to request the first terminal device to be the first terminal device. 2. Terminal equipment provides relay services.

Optionally, S702 may be performed before S701, and the first terminal device and the second terminal device discover each other. Or, if the first terminal device and the second terminal device have previously discovered each other, it is not necessary to perform S702. Alternatively, the first terminal device and the second terminal device may perform S701 to complete mutual discovery and establish a connection, and S702 may not be performed.

For more content of S701, refer to the introduction of S501 in the embodiment shown in FIG. 5.

S703: If the first terminal device is in the RRC idle state, the first terminal device enters the RRC connected state.

S703 is an optional step, which is not mandatory, and is represented by a dashed line in FIG. 5. For more content of S703, refer to the introduction of S503 in the embodiment shown in FIG. 5.

S704. The first terminal device sends a first message to the access network device, and correspondingly, the access network device receives the first message from the first terminal device.

The first message may include the identification of the second terminal device and include the first relay indication information. In the embodiment of the present application, there is no need for the first terminal device to allocate an identifier to the second terminal device. Therefore, the identifier of the second terminal device included in the first message includes, for example, the SL destination identifier of the second terminal device.

For more content of S704, refer to the introduction of S504 in the embodiment shown in FIG. 5.

S705. The access network device binds the second terminal device to the first terminal device, or in other words, the access network device establishes a binding relationship between the first terminal device and the second terminal device.

Among them, S705 is an optional step and does not have to be performed, and is represented by a dotted line in FIG. 5. For more content of S705, refer to the introduction of S505 in the embodiment shown in FIG. 5.

S706: The first terminal device sends a sixth message to the second terminal device, and correspondingly, the second terminal device receives the sixth message from the first terminal device.

For more content of S706, refer to the introduction of S506 in the embodiment shown in FIG. 5.

S707. The access network device sends a second message to the first terminal device, and correspondingly, the first terminal device receives the second message from the access network device.

Among them, S707 is an optional step, which is not required to be performed, and is represented by a dotted line in FIG. 5. For more content of S707, refer to the introduction of S507 in the embodiment shown in FIG. 5.

S708. The access network device configures a third radio bearer between the first terminal device and the second terminal device.

For more content of S708, refer to the introduction of S508 in the embodiment shown in FIG. 5.

S709. The second terminal device sends a fourth message to the first terminal device through the fifth bearer element, and correspondingly, the first terminal device receives the fourth message included in the fifth bearer element. The fourth message is a NAS message.

For example, the second terminal device sends the fourth message to the first terminal device through the preset fourth radio bearer, or the second terminal device sends the fourth message to the first terminal device through the third radio bearer, or the second terminal The device sends the fourth message to the first terminal device through the fifth radio bearer.

Among them, the fifth radio bearer is not dedicated to transmitting relay information. If the second terminal device sends a fourth message that needs to be relayed to the first terminal device through the fifth radio bearer, then in order for the first terminal device to know that the fourth message needs to be sent to the access network device, the second terminal device can send The fourth message is included in the fifth bearer element and is sent to the first terminal device through the fifth radio bearer. Wherein, the fifth bearer element includes the fourth message, and it can also be understood that the fifth bearer element includes information included in the fourth message. For example, the fourth message includes the second information, and the second information may be all or part of the content included in the fourth message. Then the fifth bearer element may include the second information, which is equivalent to that the fifth bearer element includes the fourth message.

Optionally, if the second terminal device sends the fourth message to the first terminal device through the fourth radio bearer or the third radio bearer, the second terminal device may not need to include the fourth message (or the second information) in the first terminal device. Five bearing elements. Or, because the fourth message is a NAS message, even if the second terminal device sends the fourth message to the first terminal device through the fourth radio bearer or the third radio bearer, the second terminal device can also send the fourth message (or, The second information) is included in the fifth bearer element. At this time, the fifth bearer element is carried on the fourth radio bearer or the third radio bearer.

The fifth bearer element may be used to transmit relay information, for example, to transmit uplink NAS information from the second terminal device that needs to be relayed. For example, the fifth bearer element can be specified by agreement. The fifth bearer element is, for example, a new cell in the PC5-RRC message. For example, the cell is SL-Uplink Information Transfer (ULInformationTransfer)-remote, or the cell may also have other names.

Optionally, in addition to the fourth message (or second information), the fifth bearer element may also include the ID of the second terminal device. The ID of the second terminal device is, for example, the 5G-service-temporary of the second terminal device. Mobile subscriber identity (serving-temporary mobile subscriber identity, S-TMSI).

S710. The first terminal device forwards the fourth message to the access network device through the third bearer element, and correspondingly, the access network device receives the fourth message included in the third bearer element.

The first terminal device receives the fourth message from the second terminal device through the fifth bearer element. According to the fifth bearer element, the first terminal device can determine that the fourth message needs to be forwarded to the core network device, then the first terminal device The fourth message may be forwarded to the access network device, and then forwarded by the access network device to the core network device.

For example, the first terminal device forwards the fourth message to the access network device through the first radio bearer, or the first terminal device forwards the fourth message to the access network device through the second radio bearer.

Among them, the second radio bearer is not dedicated to transmitting relay information. If the first terminal device forwards the fourth message that needs to be relayed to the access network device through the second radio bearer, then in order to enable the access network device to determine that the fourth message needs to be sent to the core network device, the first terminal device may send the fourth message to the core network device. The four messages are included in the third bearer element and sent to the first terminal device through the second radio bearer. Wherein, the third bearer element includes the fourth message, and it can also be understood that the third bearer element includes information included in the fourth message. For example, the third bearer element may include the second information, which is equivalent to that the third bearer element includes the fourth message.

Optionally, if the first terminal device forwards the fourth message to the access network device through the first radio bearer, the first terminal device may not need to include the fourth message (or the second information) in the third bearer element. Or, because the fourth message is a NAS message, even if the first terminal device sends the fourth message to the access network device through the first radio bearer, in order for the access network device to clarify that the fourth message needs to be sent to the core network device, The second terminal device may also include the fourth message (or the second information) in the third bearer element. In this case, the third bearer element is carried on the first radio bearer.

The third bearer element can be used to transmit relay information, for example, to transmit uplink NAS information from the second terminal device that needs to be relayed. For example, the third bearer element can be specified by agreement. The fifth bearer element is, for example, a new information element in the RRC message, for example, the information element is SL-ULInformationTransfer-remote, or the information element may also have other names.

Optionally, in addition to the fourth message (or second information), the fifth bearer element may also include the ID of the second terminal device. The ID of the second terminal device is, for example, the 5G-S-TMSI of the second terminal device. .

S711. The access network device sends a seventh message to the first core network device, and the first core network device receives the seventh message from the access network device. The first core network device is, for example, AMF or SMF, and the seventh message includes the fourth message. Wherein, the seventh message includes the fourth message, and it can also be understood that the seventh message includes information included in the fourth message. For example, the seventh message may include the second information, which is equivalent to that the seventh message includes the fourth message.

As an optional implementation manner, the seventh message is, for example, an N2 message corresponding to the first terminal device. In this case, the seventh message can be used to request the establishment of a protocol data unit (PDU) corresponding to the first terminal device. Session. For the N2 message including the fourth message, it can also be understood that the N2 message includes the information included in the fourth message. For example, the N2 message may include the second information, which is equivalent to the N2 message including the fourth message.

Optionally, in addition to the fourth message (or second information), the N2 message may also include the ID of the second terminal device. The ID of the second terminal device is, for example, the 5G-S-TMSI of the second terminal device. In this way, the core network device can perceive the existence of the second terminal device.

Or, as an optional implementation manner, the seventh message is, for example, an initial UE message (initial UE message) corresponding to the second terminal device. For example, after receiving the seventh message, if the access network device determines that the seventh message is the first uplink NAS message from the second terminal device, it may send the initial UE message corresponding to the second terminal device to the AMF to request Establish a PDU session corresponding to the second terminal device.

If the seventh message is the N2 message corresponding to the first terminal device, continue to perform the steps shown in FIG. 8; or, if the seventh message is the initial UE message corresponding to the second terminal device, continue to perform the steps shown in FIG. 10 The various steps shown.

S801. The first core network device determines to establish a PDU session for the second terminal device, or in other words, the first core network device determines to establish a PDU session for the second terminal device.

The first core network device is, for example, an AMF, and the AMF may determine to establish a PDU session for the second terminal device, for example, the PDU session is referred to as the first PDU session.

S802. The first core network device sends third information to the second core network device, and the second core network device receives the third information from the first core network device. The first core network device may send the third information to the second core network device through the transmission channel between the first core network device and the second core network device corresponding to the first terminal device. The second core network device is, for example, SMF.

The third information includes information used to establish the first PDU session. For example, the third information includes the 5G-S-TMSI of the second terminal device and so on.

Optionally, the first core network device may bind the ID of the first terminal device and the ID of the second terminal device, or it can be understood that the first core network device may establish a binding relationship between the first terminal device and the second terminal device .

S803. The second core network device sends an eighth message to the first core network device, and the first core network device receives the eighth message from the second core network device. The eighth message may include the IP address allocated by the second core network device to the second terminal device.

After receiving the third information, the second core network device may select an appropriate UPF for the first PDU session, and the second core network device may allocate an IP address to the second terminal device. The second core network device may then send the IP address allocated for the second terminal device to the first core network device. For example, the eighth message may include a seventh bearer element, and the seventh bearer element includes an IP address allocated by the second core network device to the second terminal device. The seventh bearer element is used to transmit information corresponding to the first terminal device. Wherein, the IP address allocated by the second core network device to the second terminal device may be within the range of the IP address corresponding to the first terminal device. It can be considered that the IP address allocated by the second core network device to the second terminal device is the first The IP sub-address of the terminal device, for example, the IP address is an address under the IP prefix of the first terminal device, or the second core network device specifies the port number of the first terminal device for the second terminal device. It can also be seen in this way that the second core network device can perceive the pairing relationship between the first terminal device and the second terminal device (or called a binding relationship or a relay relationship, etc.). Alternatively, the IP address allocated by the second core network device to the second terminal device may also be independent of the first terminal device, for example, independent of the IP address of the first terminal device.

Optionally, the eighth message may further include an eighth bearer element, and the eighth bearer element includes parameters of the first PDU session, for example, includes quality of service (QoS) parameters of the first PDU session. The eighth bearer element is used to transmit information corresponding to the access network device. For example, the eighth message is an N1N2 message transfer, the seventh bearer element is an N1 container, and the eighth bearer element is an N2 container.

Optionally, the second core network device may bind the ID of the first terminal device and the ID of the second terminal device, or it is understood that the second core network device may establish a binding relationship between the first terminal device and the second terminal device .

S804. The first core network device forwards the eighth message to the access network device, and the access network device receives the eighth message from the first core network device.

The access network device can obtain the parameters of the first PDU session included in the eighth bearer element.

S805. The access network device sends a ninth message to the first terminal device, and the first terminal device receives the ninth message from the access network device.

Since the seventh bearer element transmits information corresponding to the first terminal device, the access network device may send a ninth message to the first terminal device, and the first terminal device receives the ninth message from the access network device. The ninth message includes the seventh bearer element, and the seventh bearer element includes the IP address allocated by the second core network device to the second terminal device, and optionally, may also include the ID of the second terminal device.

S806: The first terminal device may send a tenth message to the second terminal device, and the second terminal device receives the tenth message from the first terminal device. The tenth message may include the IP address allocated by the second core network device to the second terminal device.

After the first terminal device receives the ninth message from the access network device, since the seventh bearer element transmits information corresponding to the first terminal device, the first terminal device can obtain that the second core network device is the second terminal device Assigned IP address. Since the seventh bearer element also includes the ID of the second terminal device, the first terminal device can determine that the IP address is assigned by the second core network device to the second terminal device, and the first terminal device can resend the IP address To the second terminal device, so that the second terminal device obtains the IP address assigned by the second core network device to the second terminal device.

In this embodiment of the application, on the control plane, the second terminal device does not need to initiate the RRC connection establishment process with the access network device. The second terminal device and the access network device can communicate with the first terminal device through The PC5-RRC connection and the RRC connection between the first terminal device and the access network device perform signaling interaction. For example, refer to FIG. 9 for the protocol stack of the control plane. Since the second terminal device does not need to establish an RRC connection with the access network device, the procedure for establishing a relay connection is reduced, the signaling overhead is reduced, and the delay of the relay process is also reduced. Moreover, in the embodiments of the present application, the core network device can assign an IP address to the second terminal device, and the core network device can perceive the existence of the second terminal device. For example, the first terminal device and the second terminal device need to be charged subsequently Since the core network device can perceive the existence of the second terminal device, the core network device can charge the first terminal device and the second terminal device separately, making the charging process clearer.

On the user side, refer to Figure 10. For uplink transmission, when the second terminal device sends an uplink data packet, the IP address allocated by the second core network device is used as the source IP address of the uplink data packet, and the destination IP address of the uplink data packet is the address of the access network device. The second terminal device sends the uplink data packet to the first terminal device through the SLRB between the second terminal device and the first terminal device. After receiving the uplink data packet from the second terminal device, the first terminal device sends the uplink data packet to the receiving device. The access network device sends the uplink data packet to the core network device, such as UPF. Among them, the data packet corresponding to the second terminal device is transmitted between the first terminal device and the access network device through the DRB1 of the first terminal device, and the data packet corresponding to the second terminal device is transmitted between the first terminal device and the access network device through the DRB2 of the first terminal device. Corresponding to the data packet of the first terminal device. The data packet corresponding to the first terminal device is transmitted between the access network device and the UPF through the PDU session of the first terminal device, and the data packet corresponding to the second terminal device is transmitted. Among them, DRB1 is used to transmit relay information.

For downlink transmission, when the second terminal device performs application registration with the network, the filled-in IP address may be the IP address assigned by the second core network device to the second terminal device. When a core network device (such as UPF) has a downlink data packet from a second terminal device, because UPF knows that the second terminal device is under the first terminal device, or it is known that the first terminal device and the second terminal device are bound Relationship, the UPF can send the downlink data packet to the access network device through the first PDU session, and the access network device sends the downlink data packet to the first terminal device through DRB1. After the first terminal device receives the downlink data packet , Forwarding the downlink data packet to the second terminal device according to the address information of the second terminal device.

Among them, data relay also requires data bearers on two segments. For this part, reference may be made to the related introduction of the embodiment shown in FIG. 5.

If the seventh message is the initial UE message corresponding to the second terminal device, then continue to perform the steps shown in FIG. 11. The steps in Figure 11 are described below.

S1101. The first core network device establishes an initial context (context) for the second terminal device.

If the steps shown in FIG. 8 are executed, the core network device does not establish a PDU session for the second terminal device, and the second terminal device needs to use the PDU session of the first terminal device to transmit information. If the steps shown in FIG. 11 are executed, the core network device can establish a PDU session for the second terminal device, and the second terminal device can use the PDU session of the second terminal device to transmit information.

S1102. The first core network device sends third information to the second core network device, and the second core network device receives the third information from the first core network device. The first core network device may send the third information to the second core network device through the transmission channel between the first core network device and the second core network device corresponding to the first terminal device. The second core network device is, for example, SMF.

The third information includes information used to establish a second PDU session, for example, the third information includes 5G-S-TMSI of the second terminal device, etc. The second PDU session is a PDU session corresponding to the second terminal device.

S1103. The second core network device sends the eleventh message to the first core network device, and the first core network device receives the eleventh message from the second core network device. The eleventh message may include the IP address allocated by the second core network device to the second terminal device.

After receiving the third information, the second core network device may select an appropriate UPF for the second PDU session, and the second core network device may allocate an IP address to the second terminal device. After that, the second core network device may send the IP address allocated for the second terminal device to the first core network device. For example, the eleventh message may include a ninth bearer element, which includes an IP address allocated by the second core network device to the second terminal device, and optionally, may also include the ID of the second terminal device. The ninth bearer element is used to transmit information corresponding to the second terminal device.

Optionally, the eleventh message may further include an eighth bearer element, and the eighth bearer element includes the parameters of the second PDU session, for example, includes the QoS parameters of the second PDU session. The eighth bearer element is used to transmit information corresponding to the access network equipment. For example, the eighth message is N1N2 message transfer, the ninth bearer element is the N1 container, and the eighth bearer element is the N2 container.

Optionally, the second core network device may bind the ID of the first terminal device and the ID of the second terminal device, or it is understood that the second core network device may establish a binding relationship between the first terminal device and the second terminal device .

S1104. The first core network device forwards the eleventh message to the access network device, and the access network device receives the eleventh message from the first core network device.

The access network device can obtain the parameters of the second PDU session included in the eighth bearer element.

S1105. The access network device sends a twelfth message to the first terminal device, and the first terminal device receives the twelfth message from the access network device.

Since the ninth bearer element transmits information corresponding to the second terminal device, the access network device may send the twelfth message to the first terminal device, and the first terminal device receives the twelfth message from the access network device. The twelfth message includes a ninth bearer element, and the ninth bearer element includes an IP address allocated by the second core network device to the second terminal device, and optionally, may also include the ID of the second terminal device.

S1106. The first terminal device sends the thirteenth message to the second terminal device, and the second terminal device receives the thirteenth message from the first terminal device. The thirteenth message includes the IP address allocated by the second core network device to the second terminal device.

After the first terminal device receives the twelfth message from the access network device, since the ninth bearer element transmits information corresponding to the second terminal device, the first terminal device can send the thirteenth message to the second terminal device The second terminal device receives a thirteenth message from the first terminal device, the thirteenth message includes a ninth bearer element, and the ninth bearer element includes an IP address allocated by the second core network device to the second terminal device. In this way, the second terminal device obtains the IP address allocated by the second core network device to the second terminal device.

S1107. The second terminal device sends the IP address to the first terminal device, and the first terminal device receives the IP address from the second terminal device, so that the first terminal device can determine that the second core network device is the second terminal device Assigned IP address.

For example, the second terminal device may send the IP address to the first terminal device through a PC5-S message, or may also send the IP address to the first terminal device through a PC5-RRC message.

Among them, because in S1105, the first terminal device can also obtain the IP address assigned by the second core network device to the second terminal device, so S1107 is an optional step and is not required to be performed, which is represented by a dotted line in FIG. 11.

In this embodiment of the application, on the control plane, the second terminal device does not need to initiate the RRC connection establishment process with the access network device. The second terminal device and the access network device can communicate with the first terminal device through The PC5-RRC connection and the RRC connection between the first terminal device and the access network device perform signaling interaction. For example, refer to FIG. 7 for the protocol stack of the control plane. Since the second terminal device does not need to establish an RRC connection with the access network device, the procedure for establishing a relay connection is reduced, the signaling overhead is reduced, and the delay of the relay process is also reduced. Moreover, in the embodiments of the present application, the core network device can assign an IP address to the second terminal device, and the core network device can perceive the existence of the second terminal device. For example, the first terminal device and the second terminal device need to be charged subsequently Since the core network device can perceive the existence of the second terminal device, the core network device can charge the first terminal device and the second terminal device separately, making the charging process clearer.

On the user side, refer to Figure 12. When the second terminal device sends an uplink data packet, it uses the IP address assigned by the second core network device to the second terminal device as the source IP address of the uplink data packet, and the destination IP address of the uplink data packet is filled in as the access network device The uplink data packet is sent to the first terminal device through the SLRB with the first terminal device. After receiving the uplink data packet from the second terminal device, the first terminal device sends the uplink data packet to the access network device, and the access network device sends the uplink data packet to the core network device, such as UPF. Among them, the data packet corresponding to the second terminal device is transmitted between the first terminal device and the access network device through the DRB1 of the first terminal device, and the data packet corresponding to the second terminal device is transmitted between the first terminal device and the access network device through the DRB2 of the first terminal device. Corresponding to the data packet of the first terminal device. The data packet corresponding to the first terminal device is transmitted between the access network device and the UPF through the PDU session B of the first terminal device, and the data packet corresponding to the first terminal device is transmitted through the PDU session A (for example, the second PDU session) of the second terminal device. 2. Data packets of terminal equipment.

For downlink transmission, when the second terminal device performs application registration, the filled-in IP address is the IP address assigned by the second core network device to the second terminal device. When the core network device (for example, UPF) has a downlink data packet from the second terminal device, the UPF sends the downlink data packet to the access network device through PDU session A, and the access network device determines the downlink data packet according to PDU session A Corresponding to the second terminal device, the access network device will send the downlink data packet to the first terminal device through DRB1 of the first terminal device (for example, the access network device triggers the access network device to configure the first terminal device for the first terminal device). DRB1 of a terminal device, but DRB1 is used to carry the data of the second terminal device, that is, DRB1 is used to transmit relay information), after the first terminal device receives the downlink data packet, according to the destination IP address of the downlink data packet ( The target IP address of the downlink data packet is the IP address allocated by the second core network device to the second terminal device), and the downlink data packet is sent to the second terminal device.

Among them, data relay also requires data bearers on two segments. For this part, reference may be made to the related introduction of the embodiment shown in FIG. 5.

The device used to implement the foregoing method in the embodiments of the present application will be described below with reference to the accompanying drawings. Therefore, the above content can all be used in the subsequent embodiments, and the repeated content will not be repeated.

FIG. 13 is a schematic block diagram of a communication device 1300 according to an embodiment of the application. Exemplarily, the communication apparatus 1300 is, for example, an access network device 1300.

The access network device 1300 includes a processing module 1310 and a transceiver module 1320. Exemplarily, the access network device 1300 may be an access network device, or may be a chip applied to the access network device or other combination devices, components, etc. having the functions of the access network device described above. When the access network device 1300 is an access network device, the transceiver module 1320 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 1310 may be a processor (or processing circuit), such as a baseband processor, The baseband processor may include one or more central processing units (central processing units, CPUs). When the access network device 1300 is a component having the above-mentioned access network device function, the transceiver module 1320 may be a radio frequency unit, and the processing module 1310 may be a processor (or processing circuit), such as a baseband processor. When the access network device 1300 is a chip system, the transceiver module 1320 may be an input/output interface of a chip (for example, a baseband chip), and the processing module 1310 may be a processor (or processing circuit) of the chip system, and may include one or more Central processing unit. It should be understood that the processing module 1310 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component (or processing circuit), and the transceiver module 1320 may be implemented by a transceiver or a transceiver-related circuit component.

For example, the processing module 1310 may be used to perform all operations other than the transceiving operations performed by the access network device in the embodiment shown in FIG. 5, such as S505 and S508, and/or to support the technology described herein Other processes. The transceiver module 1320 may be used to perform all the transceiver operations performed by the access network device in the embodiment shown in FIG. 5, such as S503, S504, S507, S510, and S511, and/or for supporting the technology described herein Other processes.

For another example, the processing module 1310 may be used to perform all operations performed by the access network device in the embodiment shown in FIG. 7 except for the transceiving operations, such as S705 and S708, and/or to support the operations described herein. Other processes of technology. The transceiver module 1320 can be used to perform all the transceiver operations performed by the access network device in the embodiment shown in FIG. 7, such as S703, S704, S707, S710, and S711, and/or for supporting the technology described herein Other processes.

For another example, the transceiver module 1320 may be used to perform all the transceiver operations performed by the access network device in the embodiment shown in FIG. 8, such as S804 and S805, and/or other processes used to support the technology described herein.

For another example, the transceiver module 1320 may be used to perform all the transceiver operations performed by the access network device in the embodiment shown in FIG. 11, such as S1104 and S1105, and/or other processes used to support the technology described herein.

In addition, the transceiver module 1320 can be a functional module that can complete both sending and receiving operations. For example, the transceiver module 1320 can be used to execute the embodiment shown in FIG. 5, the embodiment shown in FIG. 7, and the embodiment shown in FIG. All the sending and receiving operations performed by the access network device in the embodiment shown in 8 or the embodiment shown in FIG. 11, for example, when performing the sending operation, the transceiver module 1320 can be considered as Sending module, and when performing the receiving operation, the transceiver module 1320 can be considered as the receiving module; or, the transceiver module 1320 can also be two functional modules, and the transceiver module 1320 can be regarded as the collective name of these two functional modules. The modules are a sending module and a receiving module. The sending module is used to complete the sending operation. For example, the sending module can be used to execute the embodiment shown in Figure 5, the embodiment shown in Figure 7, the embodiment shown in Figure 8, or the embodiment shown in Figure 11. In any of the shown embodiments, in all the sending operations performed by the access network device, the receiving module is used to complete the receiving operation. For example, the receiving module can be used to perform the embodiment shown in FIG. 5 and the embodiment shown in FIG. All receiving operations performed by the access network device in any one of the illustrated embodiment, the embodiment shown in FIG. 8 or the embodiment shown in FIG. 11.

Wherein, the transceiver module 1320 (or the receiving module) is configured to receive the first message from the first terminal device;

The processing module 1310 is configured to obtain the identifier of the second terminal device and the first relay indication information from the first message, where the first relay indication information is used to indicate that the first terminal device is in the second A relay service is performed between the terminal device and the access network device 1300.

As an optional implementation manner, the processing module 1310 is further configured to establish a binding relationship between the second terminal device and the first terminal device.

As an optional implementation manner, the identifier of the second terminal device is a layer 2 address of the second terminal device, or an identifier allocated by the first terminal device to the second terminal device.

As an optional implementation manner, the first message further includes information used to indicate that the second terminal device is in the OOC state.

As an optional implementation manner, the transceiver module 1320 (or, the sending module) is further configured to send a second message to the first terminal device, and the second message is used to configure the access network device 1300 and A first radio bearer between the first terminal devices, and the first radio bearer is used to transmit information corresponding to the second terminal device.

As an optional implementation manner, the transceiver module 1320 (or, the receiving module) is further configured to receive a third message from the second terminal device through the first radio bearer, wherein the first There is also a second radio bearer between the terminal device and the access network device 1300, and the second radio bearer is used to transmit information corresponding to the first terminal device.

As an optional implementation manner, the third message is used to request resource allocation, and the transceiver module 1320 (or the sending module) is also used to send to the first terminal device through the first radio bearer Information about the first resource.

As an optional implementation manner, the transceiver module 1320 (or the receiving module) is further configured to receive the third message from the first terminal device through the first bearer element of the second radio bearer, The third message is uplink information corresponding to the second terminal device, and the second radio bearer is used to transmit information corresponding to the first terminal device.

As an optional implementation manner, the third message is used to request the allocation of resources, and the transceiver module 1320 (or the sending module) is also used to send the second bearer element of the second radio bearer to the The first terminal device sends information about the first resource, where the information about the first resource is downlink information corresponding to the second terminal device.

As an optional implementation manner, the transceiver module 1320 (or the sending module) is further configured to:

The first configuration information is sent to the first terminal device through the second radio bearer with the first terminal device, where the first configuration information is the configuration of the first terminal device corresponding to the third radio bearer, the The third radio bearer is a radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit interactive information between the second terminal device and the access network device 1300 ;or,

Sending first configuration information and second configuration information to the first terminal device through the second radio bearer with the first terminal device, where the first configuration information indicates that the first terminal device corresponds to the third radio bearer The second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third radio bearer is the configuration between the first terminal device and the second terminal device Radio bearer, the third radio bearer is used to transmit interactive information between the second terminal device and the access network device 1300.

As an optional implementation manner, the transceiver module 1320 (or the sending module) is further configured to send second configuration information to the first terminal device through the first radio bearer, and the second configuration information Is the configuration of the second terminal device corresponding to the third radio bearer, the third radio bearer is the radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used for The interaction information between the second terminal device and the access network device 1300 is transmitted.

As an optional implementation manner, the transceiver module 1320 (or the sending module) is further configured to:

Receiving a fourth message from the first terminal device through a third bearer element, where the fourth message is an uplink NAS message between the first terminal device and a core network device;

The fourth message is sent to the core network device through an N2 message corresponding to the first terminal device, and the fourth message is used by the core network device to allocate an IP address to the second terminal device.

Or, as an optional implementation,

The receiving module is further configured to receive a fourth message from the first terminal device through a third bearer element, where the fourth message is an uplink NAS message between the first terminal device and a core network device;

The sending module is further configured to send the fourth message to the core network device through the N2 message corresponding to the first terminal device, and the fourth message is used for the core network device to be the second The terminal device assigns an IP address.

As an optional implementation manner, the transceiver module 1320 (or the sending module) is further configured to:

Receiving a fourth message from the first terminal device through a third bearer element, where the fourth message is an uplink NAS message between the first terminal device and a core network device;

Send an initial UE message to the core network device, where the initial UE message includes the fourth message, and the fourth message is used by the core network device to allocate an IP address to the second terminal device.

Or, as an optional implementation,

The receiving module is further configured to receive a fourth message from the first terminal device through a third bearer element, where the fourth message is an uplink NAS message between the first terminal device and a core network device;

The sending module is further configured to send an initial UE message to the core network device, where the initial UE message includes the fourth message, and the fourth message is used when the core network device is the second terminal device Assign an IP address.

For other functions that can be implemented by the access network device 1300, refer to any one of the embodiment shown in FIG. 5, the embodiment shown in FIG. 7, the embodiment shown in FIG. 8, or the embodiment shown in FIG. 11 The relevant introduction of the embodiment will not be repeated.

FIG. 14 is a schematic block diagram of a communication device 1400 according to an embodiment of the application. Exemplarily, the communication device 1400 is, for example, the first terminal device 1400. Exemplarily, the first terminal device 1400 is, for example, the second access network device described in the embodiment shown in FIG. 6 or the embodiment shown in FIG. 7.

The first terminal device 1400 includes a sending module 1420 and a receiving module 1430. Optionally, a processing module 1410 may also be included. Exemplarily, the first terminal device 1400 may be a terminal device, and may also be a chip applied to the terminal device or other combination devices, components, etc. having the functions of the first terminal device described above. When the first terminal device 1400 is a terminal device, the sending module 1420 and/or the receiving module 1430 may be a transceiver, the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 1410 may be a processor (or a processing circuit), for example Baseband processor. The baseband processor may include one or more CPUs. When the first terminal device 1400 is a component with the above-mentioned first terminal device function, the sending module 1420 and/or the receiving module 1430 may be a radio frequency unit, and the processing module 1410 may be a processor (or a processing circuit), such as a baseband processor . When the first terminal device 1400 is a chip system, the sending module 1420 and/or the receiving module 1430 may be the input/output interface of the chip (for example, a baseband chip), and the processing module 1410 may be the processor (or processing circuit) of the chip system, It may include one or more central processing units. It should be understood that the processing module 1410 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit), and the sending module 1420 and/or the receiving module 1430 may be implemented by a transceiver or a transceiver-related circuit. Component realization.

For example, the processing module 1410 may be used to perform all operations performed by the first terminal device in the embodiment shown in FIG. 5 except for the transceiving operation, such as obtaining the first relay instruction information according to the second relay instruction information. Operations, and/or other processes used to support the techniques described herein. The sending module 1420 can be used to perform all the sending operations performed by the first terminal device in the embodiment shown in FIG. 5, such as S502, S504, S506, S510, and S512, and/or for supporting the technology described herein. Other processes. The receiving module 1430 may be used to perform all the receiving operations performed by the first terminal device in the embodiment shown in FIG. 5, such as S501, S502, S507, S509, and S511, and/or for supporting the technology described herein Other processes.

For another example, the processing module 1410 may be used to perform all operations performed by the first terminal device in the embodiment shown in FIG. 7 except for the transceiving operation, for example, obtaining the first relay instruction information according to the second relay instruction information. And/or other processes used to support the techniques described herein. The sending module 1420 may be used to perform all the sending operations performed by the first terminal device in the embodiment shown in FIG. 7, such as S702, S704, S706, and S710, and/or other processes used to support the technology described herein . The receiving module 1430 may be used to perform all receiving operations performed by the first terminal device in the embodiment shown in FIG. 7, such as S701, S702, S707, and S709, and/or other processes used to support the technology described herein .

For another example, the sending module 1420 may be used to perform all the sending operations performed by the first terminal device in the embodiment shown in FIG. 8, such as S806, and/or other processes used to support the technology described herein. The receiving module 1430 may be used to perform all receiving operations performed by the first terminal device in the embodiment shown in FIG. 8, such as S805, and/or other processes used to support the technology described herein.

For another example, the sending module 1420 may be used to perform all the sending operations performed by the first terminal device in the embodiment shown in FIG. 11, such as S1106, and/or other processes used to support the technology described herein. The receiving module 1430 may be used to perform all receiving operations performed by the first terminal device in the embodiment shown in FIG. 11, such as S1105 and S1107, and/or other processes used to support the technology described herein.

In addition, for the implementation of the sending module 1420 and the receiving module 1430, reference may be made to the introduction of the implementation of the transceiver module 1320.

Wherein, the receiving module 1430 is configured to receive a fifth message from the second terminal device, the fifth message includes second relay indication information, and the second relay indication information is used to request the first terminal device 1400 to be the first terminal device. 2. Terminal equipment provides relay services;

The sending module 1420 is configured to send a first message to the access network device, where the first message includes the identifier of the second terminal device and includes first relay indication information, and the first relay indication information is used to indicate the second terminal device. A terminal device 1400 performs a relay service between the second terminal device and the access network device.

or,

The receiving module 1430 (or the transceiving module) is configured to receive a fifth message from the second terminal device, the fifth message including second relay indication information, and the second relay indication information is used to request the first A terminal device 1400 provides a relay service for the second terminal device;

The processing module 1410 is configured to obtain first relay indication information according to the second relay indication information, and the first relay indication information is used to instruct the first terminal device 1400 to connect to the second terminal device and the access network. Relay service between devices

The sending module 1420 (or the transceiver module) is configured to send a first message to the access network device, where the first message includes the identifier of the second terminal device and includes first relay indication information.

As an optional implementation manner, the identifier of the second terminal device is the layer 2 address of the second terminal device, or the identifier assigned by the first terminal device 1400 to the second terminal device.

As an optional implementation manner, the first message further includes information used to indicate that the second terminal device is in the OOC state.

As an optional implementation manner, the receiving module 1430 (or the transceiver module) is further configured to receive a second message from the access network device, and the second message is used to configure the access network A first radio bearer between the device and the first terminal device 1400, where the first radio bearer is used to transmit information corresponding to the first terminal device 1400.

As an optional implementation manner, the receiving module 1430 (or the transceiver module) is further configured to receive second configuration information from the access network device through the first radio bearer, and the second configuration The information is the configuration of the second terminal device corresponding to the third radio bearer, the third radio bearer is the radio bearer between the first terminal device 1400 and the second terminal device, and the third radio bearer is used for Transmit the interaction information between the second terminal device and the access network device.

As an optional implementation,

The sending module 1420 (or the transceiver module) is further configured to forward the second configuration information to the second terminal device;

The receiving module 1430 (or the transceiver module) is further configured to receive third configuration information from the second terminal device, where the third configuration information includes part or all of the content of the first configuration information;

The processing module 1410 is configured to generate a configuration of the first terminal device 1400 corresponding to the third radio bearer according to the third configuration information.

As an optional implementation,

The receiving module 1430 (or the transceiver module) is further configured to receive first configuration information from the access network device through a second radio bearer with the access network device, and the first configuration information Is the configuration of the first terminal device 1400 corresponding to the third radio bearer, the third radio bearer is the radio bearer between the first terminal device 1400 and the second terminal device, and the third radio bearer is used for transmission The interaction information between the second terminal device and the access network device;

The sending module 1420 (or the transceiver module) is further configured to send fourth configuration information to the second terminal device, where the fourth configuration information is used to generate that the second terminal device corresponds to the third wireless The configuration of the bearer, the fourth configuration information includes part or all of the content of the first configuration information.

As an optional implementation,

The receiving module 1430 (or the transceiver module) is further configured to receive the first configuration information and the second configuration information from the access network device through the second radio bearer with the access network device, so The first configuration information is the configuration of the first terminal device 1400 corresponding to the third radio bearer, the second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third radio bearer Is a radio bearer between the first terminal device 1400 and the second terminal device, and the third radio bearer is used to transmit interactive information between the second terminal device and the access network device;

The sending module 1420 (or the transceiver module) is further configured to send the second configuration information to the second terminal device.

As an optional implementation,

The receiving module 1430 (or the transceiver module) is further configured to receive a third message from the second terminal device through the third radio bearer;

The sending module 1420 (or the transceiver module) is further configured to send a third message to the access network device through the first bearer element of the second radio bearer with the access network device, or The first radio bearer sends a third message to the access network device, where the first bearer element is used to transmit uplink information corresponding to the second terminal device, and the first radio bearer is used to transmit Information of the second terminal device.

As an optional implementation manner, the third message is used to request resource allocation,

The receiving module 1430 (or the transceiver module) is further configured to receive the information of the first resource from the access network device through the second bearer element of the second radio bearer, or, through the first wireless bearer A bearer receives information about a first resource from the access network device, where the information about the first resource is downlink information corresponding to the second terminal device;

The sending module 1420 (or the transceiver module) is further configured to send the information of the first resource to the second terminal device through the third radio bearer.

As an optional implementation,

The receiving module 1430 (or the transceiver module) is further configured to receive the third message from the second terminal device through the preset fourth radio bearer, or to receive the third message from the second terminal device through the fourth bearer element of the fifth radio bearer. The third message of the second terminal device, the fourth radio bearer is used to transmit interactive information between the second terminal device and the access network device, and the fourth bearer element is used to transmit the Interactive information between the second terminal device and the access network device;

The sending module 1420 (or the transceiver module) is further configured to send a third message to the access network device through the first bearer element of the second radio bearer with the access network device, or The first radio bearer sends a third message to the access network device, where the first bearer element is used to transmit uplink information corresponding to the second terminal device, and the first radio bearer is used to transmit Information of the second terminal device.

As an optional implementation manner, the third message is used to request resource allocation,

The receiving module 1430 (or the transceiver module) is further configured to receive the information of the first resource from the access network device through the second bearer element of the second radio bearer, or, through the first wireless bearer A bearer receives information about a first resource from the access network device, where the information about the first resource is downlink information corresponding to the second terminal device;

The sending module 1420 (or the transceiving module) is further configured to send the information of the first resource to the second terminal device through the fourth radio bearer, or to send the information of the first resource through the fourth bearer element. The information of the first resource is sent to the second terminal device.

As an optional implementation,

The receiving module 1430 (or the transceiver module) is further configured to receive a fourth message from the second terminal device through a fifth bearer element, where the fourth message is a NAS message, and the fifth bearer element is used for Transmitting the uplink NAS message between the second terminal device and the core network device;

The sending module 1420 (or the transceiver module) is further configured to forward the fourth message to the access network device through a third bearer element, and the third bearer element is used to transmit the second terminal device and Uplink NAS messages between core network devices.

Regarding other functions that can be implemented by the first terminal device 1400, reference may be made to any one of the embodiment shown in FIG. 5, the embodiment shown in FIG. 7, the embodiment shown in FIG. 8, or the embodiment shown in FIG. 11. The relevant introduction of the embodiment will not be repeated.

FIG. 15 is a schematic block diagram of a communication device 1500 according to an embodiment of the application. Exemplarily, the communication apparatus 1500 is, for example, the second terminal device 1500. Exemplarily, the second terminal device 1500 is, for example, the second access network device described in the embodiment shown in FIG. 6 or the embodiment shown in FIG. 7.

The second terminal device 1500 includes a sending module 1520 and a receiving module 1530. Optionally, a processing module 1510 may also be included. Exemplarily, the second terminal device 1500 may be a terminal device, and may also be a chip applied in the terminal device or other combination devices, components, etc. having the functions of the second terminal device described above. When the second terminal device 1500 is a terminal device, the sending module 1520 and/or the receiving module 1530 may be a transceiver, the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 1510 may be a processor (or a processing circuit), for example Baseband processor. The baseband processor may include one or more CPUs. When the second terminal device 1500 is a component with the above-mentioned second terminal device function, the sending module 1520 and/or the receiving module 1530 may be a radio frequency unit, and the processing module 1510 may be a processor (or a processing circuit), such as a baseband processor . When the second terminal device 1500 is a chip system, the sending module 1520 and/or the receiving module 1530 may be the input/output interface of the chip (for example, a baseband chip), and the processing module 1510 may be the processor (or processing circuit) of the chip system, It may include one or more central processing units. It should be understood that the processing module 1510 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit), and the sending module 1520 and/or receiving module 1530 may be implemented by a transceiver or a transceiver-related circuit. Component realization.

For example, the processing module 1510 may be used to perform all operations other than the transceiving operation performed by the second terminal device in the embodiment shown in FIG. 5, such as determining the second relay indication information operation, and/or for Other processes that support the technology described in this article. The sending module 1520 may be used to perform all the sending operations performed by the second terminal device in the embodiment shown in FIG. 5, such as S501, S502, and S509, and/or other processes used to support the technology described herein. The receiving module 1530 may be used to perform all receiving operations performed by the second terminal device in the embodiment shown in FIG. 5, such as S501, S506, and S512, and/or other processes used to support the technology described herein.

For another example, the processing module 1510 may be used to perform all operations performed by the second terminal device in the embodiment shown in FIG. 7 except for the transceiving operation, such as determining the second relay indication information operation, and/or use To support other processes of the technology described in this article. The sending module 1520 may be used to perform all the sending operations performed by the second terminal device in the embodiment shown in FIG. 7, such as S701, S702, and S709, and/or other processes used to support the technology described herein. The receiving module 1530 may be used to perform all receiving operations performed by the second terminal device in the embodiment shown in FIG. 7, such as S701 and S706, and/or other processes used to support the technology described herein.

For another example, the receiving module 1530 may be used to perform all receiving operations performed by the second terminal device in the embodiment shown in FIG. 8, such as S806, and/or other processes used to support the technology described herein.

For another example, the sending module 1520 may be used to perform all the sending operations performed by the second terminal device in the embodiment shown in FIG. 11, such as S1107, and/or other processes used to support the technology described herein. The receiving module 1530 may be used to perform all receiving operations performed by the second terminal device in the embodiment shown in FIG. 11, such as S1106, and/or other processes used to support the technology described herein.

In addition, for the implementation of the sending module 1520 and the receiving module 1530, reference may be made to the introduction of the implementation of the transceiver module 1320.

Wherein, the sending module 1520 is configured to send a fifth message to the first terminal device, where the fifth message includes second relay indication information, and the second relay indication information is used to request the first terminal device to be the first terminal device. The second terminal device 1500 provides a relay service, and the second relay indication information is used to determine the first relay indication information sent to the access network device, and the first relay indication information is used to indicate the second A terminal device performs a relay service between the second terminal device 1500 and the access network device;

The receiving module 1530 is configured to receive a sixth message from the first terminal device, where the sixth message is used to indicate that the connection with the first terminal device has been established.

or,

The processing module 1510 is configured to determine second relay indication information, where the second relay indication information is used to request the first terminal device to provide a relay service for the second terminal device 1500, and the second relay The indication information is used to determine the first relay indication information sent to the access network device, and the first relay indication information is used to indicate that the first terminal device is between the second terminal device 1500 and the access network device. Relay service between;

The sending module 1520 (or the transceiver module) is configured to send a fifth message to the first terminal device, where the fifth message includes second relay indication information;

The receiving module 1530 (or, the transceiver module) is configured to receive a sixth message from the first terminal device, where the sixth message is used to indicate that the connection with the first terminal device has been established.

As an optional implementation,

The receiving module 1530 (or the transceiver module) is further configured to receive second configuration information from the first terminal device, where the second configuration information is the configuration of the second terminal device 1500 corresponding to the third radio bearer, The third radio bearer is used to transmit interactive information between the second terminal device 1500 and the access network device;

The sending module 1520 (or the transceiver module) is further configured to send third configuration information to the first terminal device, where the third configuration information includes part or all of the second configuration information. The third configuration information is used to generate the configuration of the first terminal device corresponding to the third radio bearer.

As an optional implementation,

The receiving module 1530 (or the transceiver module) is further configured to receive fourth configuration information from the first terminal device, where the fourth configuration information includes part or all of the first configuration information, and the first configuration information One piece of configuration information is the configuration of the first terminal device corresponding to a third radio bearer, and the third radio bearer is used to transmit interactive information between the second terminal device 1500 and the access network device;

The processing module 1510 is configured to generate a configuration of the second terminal device 1500 corresponding to the third radio bearer according to the fourth configuration information.

As an optional implementation manner, the receiving module 1530 (or the transceiver module) is further configured to receive second configuration information from the first terminal device, where the second configuration information is the second terminal device 1500 Corresponding to the configuration of the third radio bearer, the third radio bearer is used to transmit interactive information between the second terminal device 1500 and the access network device.

As an optional implementation manner, the sending module 1520 (or the transceiver module) is further configured to send a third message to the first terminal device via a preset fourth radio bearer, or, via a fifth radio The third bearer element of the bearer sends a third message to the first terminal device, and the fourth radio bearer is used to transmit interactive information between the first terminal device and the access network device. The bearer element is used to transmit interactive information between the first terminal device and the access network device.

As an optional implementation manner, the third message is used to request allocation of resources, and the receiving module 1530 (or the transceiver module) is also used to receive data from the first terminal device through the fourth radio bearer. The information of the first resource, or the information of the first resource from the first terminal device is received through the third bearer element.

As an optional implementation manner, the sending module 1520 (or the transceiver module) is further configured to send a third message to the first terminal device through the third radio bearer.

As an optional implementation manner, the third message is used to request resource allocation, and the receiving module 1530 (or, the transceiver module) is also used to receive data from the first terminal device through the third radio bearer. The first resource information.

As an optional implementation manner, the sending module 1520 (or the transceiver module) is further configured to send a fourth message to the first terminal device through a fifth bearer element, where the fourth message is a NAS message, The fifth bearer element is used to transmit an uplink NAS message between the first terminal device and the core network device.

Regarding other functions that can be implemented by the second terminal device 1500, reference may be made to any one of the embodiment shown in FIG. 5, the embodiment shown in FIG. 7, the embodiment shown in FIG. 8, or the embodiment shown in FIG. 11. The relevant introduction of the embodiment will not be repeated.

FIG. 16 is a schematic block diagram of a communication device 1600 according to an embodiment of the application. Exemplarily, the communication apparatus 1600 is, for example, a core network device 1600. Exemplarily, the core network device 1600 can implement the function of the first core network device in any one of the embodiment shown in FIG. 7, the embodiment shown in FIG. 8, or the embodiment shown in FIG. 11.

The core network device 1600 includes a processing module 1610 and a transceiver module 1620. Exemplarily, the core network device 1600 may be a core network device, or may be a chip applied to the core network device or other combination devices, components, etc. having the functions of the core network device described above. When the core network device 1600 is a core network device, the transceiver module 1620 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 1610 may be a processor (or processing circuit), such as a baseband processor, baseband processing The processor can include one or more CPUs. When the core network device 1600 is a component with the above-mentioned core network device function, the transceiver module 1620 may be a radio frequency unit, and the processing module 1610 may be a processor (or processing circuit), such as a baseband processor. When the core network device 1600 is a chip system, the transceiver module 1620 may be the input and output interface of the chip (such as a baseband chip), and the processing module 1610 may be the processor (or processing circuit) of the chip system, and may include one or more central Processing unit. It should be understood that the processing module 1610 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component (or referred to as a processing circuit), and the transceiver module 1620 may be implemented by a transceiver or a transceiver-related circuit component.

For example, the transceiving module 1620 may be used to perform all the transceiving operations performed by the first core network device in the embodiment shown in FIG. 7, such as S711, and/or other processes used to support the technology described herein.

For another example, the processing module 1610 may be used to perform all operations other than the transceiving operation performed by the first core network device in the embodiment shown in FIG. 8, such as S801, and/or to support the technology described herein Other processes. The transceiver module 1620 may be used to perform all the transceiver operations performed by the first core network device in the embodiment shown in FIG. 8, such as S802 and S803, and/or other processes used to support the technology described herein.

For another example, the processing module 1610 may be used to perform all operations other than the transceiving operations performed by the first core network device in the embodiment shown in FIG. 11, such as S1101, and/or to support the technology described herein Other processes. The transceiver module 1620 can be used to perform all the receiving and sending operations performed by the first core network device in the embodiment shown in FIG. 11, such as S1102 and S1103, and/or other processes used to support the technology described herein.

In addition, for the implementation of the transceiver module 1620, reference may be made to the introduction of the implementation of the transceiver module 1320.

Wherein, the transceiver module 1620 (or, the receiving module) is configured to receive a seventh message from an access network device, the seventh message includes a fourth message, the fourth message is a NAS message, and the first message Fourth, the message includes the identification of the second terminal device;

The processing module 1610 is configured to allocate an IP address to the second terminal device according to the identifier of the second terminal device.

As an optional implementation manner, the transceiver module 1620 (or the sending module) is further configured to send the IP address to the first terminal device.

As an optional implementation manner, the seventh message is an N2 message corresponding to the first terminal device, or an initial UE message corresponding to the second terminal device.

As an optional implementation manner, the seventh message is an initial UE message corresponding to the second terminal device, and the processing module 1610 is further configured to establish an initial context for the second terminal device.

As an optional implementation manner, the seventh message is an N2 message corresponding to the first terminal device, and the processing module 1610 is further used to establish a binding between the second terminal device and the first terminal device. Definite relationship.

For other functions that can be implemented by the core network device 1600, please refer to the related introduction of any one of the embodiments shown in FIG. 7, the embodiment shown in FIG. 8, or the embodiment shown in FIG. 11, and will not be repeated here. .

The embodiment of the present application also provides a communication device, and the communication device may be a terminal device or a circuit. The communication apparatus may be used to perform the actions performed by the first terminal device or the second terminal device in the foregoing method embodiments.

When the communication device is a terminal device, FIG. 17 shows a simplified schematic diagram of the structure of the terminal device. It is easy to understand and easy to illustrate. In Fig. 17, the terminal device uses a mobile phone as an example. As shown in Figure 17, the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of description, only one memory and processor are shown in FIG. 17. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.

In the embodiments of the present application, the antenna and radio frequency circuit with transceiving functions can be regarded as the transceiving unit of the terminal device (the transceiving unit can be a functional unit that can realize the sending and receiving functions; or the transceiving unit can also be It includes two functional units, namely a receiving unit capable of realizing the receiving function and a transmitting unit capable of realizing the transmitting function), and the processor with the processing function is regarded as the processing unit of the terminal device. As shown in FIG. 17, the terminal device includes a transceiver unit 1710 and a processing unit 1720. The transceiving unit may also be called a transceiver, transceiver, transceiving device, and so on. The processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on. Optionally, the device for implementing the receiving function in the transceiver unit 1710 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1710 as the sending unit, that is, the transceiver unit 1710 includes a receiving unit and a sending unit. The transceiver unit may sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit. The receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit. The transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.

It should be understood that the transceiving unit 1710 can be used to execute the first embodiment in any one of the embodiment shown in FIG. 5, the embodiment shown in FIG. 7, the embodiment shown in FIG. 8, or the embodiment shown in FIG. For the sending and receiving operations on the terminal device side, the processing unit 1720 is configured to execute the above-mentioned embodiment shown in FIG. 5, the embodiment shown in FIG. 7, the embodiment shown in FIG. 8, or the embodiment shown in FIG. 11 In any of the embodiments, other operations on the first terminal device except for the receiving and sending operations.

When the communication device is a chip-type device or circuit, the device may include a transceiver unit and a processing unit. Wherein, the transceiving unit may be an input/output circuit and/or a communication interface; the processing unit is an integrated processor or microprocessor or integrated circuit.

When the communication device in this embodiment is a terminal device, the device shown in FIG. 18 can be referred to. As an example, the device can perform functions similar to the processing module 1410 in FIG. 14. The processing module 1410 in the foregoing embodiment may be the processor 1810 in FIG. 18 and complete corresponding functions; the sending module 1420 in the foregoing embodiment may be the sending data processor 1820 in FIG. The receiving module 1430 may be the receiving data processor 1830 in FIG. 18, and completes corresponding functions. Or, as another example, the device can perform functions similar to the processing module 1510 in FIG. 15. The processing module 1510 in the foregoing embodiment may be the processor 1810 in FIG. 18, and completes corresponding functions; the sending module 1520 in the foregoing embodiment may be the sending data processor 1820 in FIG. The receiving module 1530 may be the receiving data processor 1830 in FIG. 18, and completes corresponding functions. Although the channel encoder and the channel decoder are shown in FIG. 18, it can be understood that these modules do not constitute a restrictive description of this embodiment, and are only illustrative.

Fig. 19 shows another form of this embodiment. The processing device 1900 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem. The communication device in this embodiment can be used as the modulation subsystem therein. Specifically, the modulation subsystem may include a processor 1903 and an interface 1904. Among them, the processor 1903 completes the functions of the above-mentioned processing module 1410, and the interface 1904 completes the functions of the above-mentioned sending module 1420 and/or the receiving module 1430; or, the processor 1903 completes the functions of the above-mentioned processing module 1510, and the interface 1904 completes the above-mentioned sending modules 1520 and 1520. / Or the function of the receiving module 1530. As another variant, the modulation subsystem includes a memory 1906, a processor 1903, and a program stored in the memory 1906 and running on the processor. The processor 1903 executes the program on the terminal device side in the above method embodiment. Methods. It should be noted that the memory 1906 can be non-volatile or volatile, and its location can be located inside the modulation subsystem or in the processing device 1900, as long as the memory 1906 can be connected to the The processor 1903 is fine.

Please refer to FIG. 20, which is a schematic diagram of another communication device provided by an embodiment of this application, which is used to implement the operation of the access network device or the first core network device in the above embodiment. The communication device includes a processor 2010 and an interface 2030. Optionally, the communication device further includes a memory 2020. The interface 2030 is used to implement communication with other devices.

In the above embodiment, the method executed by the access network device or the first core network device may be called by the processor 2010 in the memory (which may be the memory 2020 in the access network device or the first core network device, or may be an external memory). Stored program to achieve. That is, the apparatus for the access network device or the first core network device may include the processor 2010, and the processor 2010 executes the access network device or the first core network device in the above method embodiment by calling a program in the memory. The method performed by the device. The processor here may be an integrated circuit with signal processing capability, such as a CPU. The apparatus for the access network device or the first core network device may be implemented by one or more integrated circuits configured to implement the above method. For example: one or more ASICs, or, one or more microprocessors DSP, or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. Or, the above implementations can be combined.

For example, the function/implementation process of the processing module 1310 in FIG. 13 can be implemented by the processor 2010 in the communication device shown in FIG. 20 calling computer executable instructions stored in the memory 2020, and the function of the transceiver module 1320 in FIG. /The realization process can be realized through the interface 2030 in the communication device shown in FIG. 20.

For another example, the function/implementation process of the processing module 1610 in FIG. 16 can be implemented by the processor 2010 in the communication device shown in FIG. 20 calling the computer execution instructions stored in the memory 2020, and the function of the transceiver module 1620 in FIG. /The realization process can be realized through the interface 2030 in the communication device shown in FIG. 20.

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

The various illustrative logic units and circuits described in the embodiments of this application can be implemented by general-purpose processors, digital signal processors, application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, Discrete gates or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the described functions. The general-purpose processor may be a microprocessor. Alternatively, the general-purpose processor may also be any traditional processor, controller, microcontroller, or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration. accomplish.

The steps of the method or algorithm described in the embodiments of the present application can be directly embedded in hardware, a software unit executed by a processor, or a combination of the two. The software unit can be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or this Any other storage media in the field. Exemplarily, the storage medium may be connected to the processor, so that the processor can read information from the storage medium, and can store and write information to the storage medium. Optionally, the storage medium may also be integrated into the processor. The processor and the storage medium can be arranged in the ASIC.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

In one or more exemplary designs, the aforementioned functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, these functions can be stored on a computer-readable medium, or transmitted on the computer-readable medium in the form of one or more instructions or codes. Computer-readable media include computer storage media and communication media that facilitate the transfer of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special computer. For example, such computer-readable media may include, but are not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other device that can be used to carry or store instructions or data structures and Other program code media that can be read by general-purpose or special computers, or general-purpose or special processors. In addition, any connection can be appropriately defined as a computer-readable medium, for example, if the software is from a website, server, or other remote source through a coaxial cable, fiber optic computer, twisted pair, or digital subscriber line (DSL) Or transmitted by wireless means such as infrared, wireless and microwave are also included in the definition of computer-readable media. The disks and discs include compressed disks, laser disks, optical disks, digital versatile discs (DVD), floppy disks, and Blu-ray disks. Disks are usually used to copy data with magnets, while disks are usually used to copy data. The laser performs optical reproduction of data. The combination of the above can also be contained in a computer readable medium.

Those skilled in the art should be aware that, in one or more of the foregoing examples, the functions described in the embodiments of the present application may be implemented by hardware, software, firmware, or any combination thereof. When implemented by software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium. The computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another. The storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

The specific implementations described above further describe the purpose, technical solutions, and beneficial effects of the embodiments of the application in detail. It should be understood that the foregoing descriptions are only specific implementations of the embodiments of the application, and are not used for To limit the protection scope of the embodiments of the application, any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the embodiments of the application shall be included in the protection scope of the embodiments of the application. The above description in the specification of this application can enable any technology in the field to utilize or implement the content of the embodiments of this application. Any modification based on the disclosed content should be considered obvious in the art. The basic principles described in the embodiments of this application can be It is applied to other modifications without departing from the nature and scope of the invention of this application. Therefore, the content disclosed in the embodiments of the present application is not limited to the described embodiments and designs, but can also be extended to the maximum range consistent with the principles of the present application and the new features disclosed.

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

Claims (30)

1. A communication method, characterized in that it comprises:

   Receiving the first message from the first terminal device;

   Obtain the identifier of the second terminal device and the first relay indication information from the first message, where the first relay indication information is used to indicate that the first terminal device is on the second terminal device and the access network Relay services between devices.
2. The method according to claim 1, wherein the method further comprises:

   Establishing a binding relationship between the second terminal device and the first terminal device.
3. The method according to claim 1 or 2, wherein the identifier of the second terminal device is the layer 2 address of the second terminal device, or the first terminal device is the second terminal device The assigned ID.
4. The method according to any one of claims 1 to 3, wherein the first message further includes information for indicating that the second terminal device is in an OOC state.
5. The method according to any one of claims 1 to 4, wherein the method further comprises:

   Send a second message to the first terminal device, where the second message is used to configure a first radio bearer between the access network device and the first terminal device, and the first radio bearer is used to transmit data corresponding to Information of the second terminal device.
6. The method according to claim 5, wherein the method further comprises:

   The third message from the second terminal device is received through the first radio bearer, wherein a second radio bearer is also present between the first terminal device and the access network device, and the second radio bearer Used to transmit information corresponding to the first terminal device.
7. The method according to claim 6, wherein the third message is used to request resource allocation, and the method further comprises:

   Sending the first resource information to the first terminal device through the first radio bearer.
8. The method according to any one of claims 1 to 5, wherein the method further comprises:

   Receive a third message from the first terminal device through the first bearer element of the second radio bearer, where the third message is uplink information corresponding to the second terminal device, and the second radio bearer is used for transmission Information corresponding to the first terminal device.
9. The method according to claim 8, wherein the third message is used to request resource allocation, and the method further comprises:

   The information of the first resource is sent to the first terminal device through the second bearer element of the second radio bearer, where the information of the first resource is downlink information corresponding to the second terminal device.
10. The method according to any one of claims 1-9, wherein the method further comprises:

    The first configuration information is sent to the first terminal device through the second radio bearer with the first terminal device, where the first configuration information is the configuration of the first terminal device corresponding to the third radio bearer, the The third radio bearer is a radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit interactive information between the second terminal device and the access network device; or,

    Sending first configuration information and second configuration information to the first terminal device through the second radio bearer with the first terminal device, where the first configuration information indicates that the first terminal device corresponds to the third radio bearer The second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third radio bearer is the configuration between the first terminal device and the second terminal device Radio bearer, the third radio bearer is used to transmit interactive information between the second terminal device and the access network device.
11. A communication method, characterized in that it comprises:

    Receive a fifth message from a second terminal device, the fifth message including second relay indication information, the second relay indication information is used to request the first terminal device to provide a relay service for the second terminal device ；

    Send a first message to the access network device, where the first message includes the identifier of the second terminal device and includes first relay indication information, where the first relay indication information is used to indicate that the first terminal device is A relay service is performed between the second terminal device and the access network device.
12. The method according to claim 11, wherein the identifier of the second terminal device is the layer 2 address of the second terminal device, or is assigned by the first terminal device to the second terminal device Logo.
13. The method according to claim 11 or 12, wherein the method further comprises:

    Receive a second message from the access network device, where the second message is used to configure a first radio bearer between the access network device and the first terminal device, and the first radio bearer is used for The information corresponding to the first terminal device is transmitted.
14. The method according to claim 13, wherein the method further comprises:

    The second configuration information from the access network device is received through the first radio bearer, where the second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third radio bearer is A radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit interactive information between the second terminal device and the access network device.
15. The method according to claim 14, wherein the method further comprises:

    Forward the second configuration information to the second terminal device;

    Receiving third configuration information from the second terminal device, where the third configuration information includes part or all of the content of the first configuration information;

    Generating the configuration of the first terminal device corresponding to the third radio bearer according to the third configuration information.
16. The method according to any one of claims 11-13, wherein the method further comprises:

    Receive first configuration information from the access network device through a second radio bearer with the access network device, where the first configuration information is the configuration of the first terminal device corresponding to the third radio bearer , The third radio bearer is a radio bearer between the first terminal device and the second terminal device, and the third radio bearer is used to transmit the communication between the second terminal device and the access network device Mutual information between;

    Send fourth configuration information to the second terminal device, where the fourth configuration information is used to generate a configuration of the second terminal device corresponding to the third radio bearer, and the fourth configuration information includes the first Part or all of the configuration information.
17. The method according to any one of claims 11-13, wherein the method further comprises:

    Receive first configuration information and second configuration information from the access network device through a second radio bearer with the access network device, where the first configuration information indicates that the first terminal device corresponds to the first configuration information Three radio bearer configuration, the second configuration information is the configuration of the second terminal device corresponding to the third radio bearer, and the third radio bearer is the first terminal device and the second terminal device The third radio bearer is used to transmit interactive information between the second terminal device and the access network device;

    Sending the second configuration information to the second terminal device.
18. The method according to any one of claims 14-17, wherein the method further comprises:

    Receiving a third message from the second terminal device through the third radio bearer;

    Send a third message to the access network device through the first bearer element of the second radio bearer with the access network device, or send a third message to the access network device through the first radio bearer , Wherein the first bearer element is used to transmit uplink information corresponding to the second terminal device, and the first radio bearer is used to transmit information corresponding to the second terminal device.
19. The method according to claim 18, wherein the third message is used to request resource allocation, and the method further comprises:

    Receive information about the first resource from the access network device through the second bearer element of the second radio bearer, or receive information about the first resource from the access network device through the first radio bearer , The information of the first resource is downlink information corresponding to the second terminal device;

    Sending the information of the first resource to the second terminal device through the third radio bearer.
20. The method according to any one of claims 11-17, wherein the method further comprises:

    The third message from the second terminal device is received through the preset fourth radio bearer, or the third message from the second terminal device is received through the fourth bearer element of the fifth radio bearer, the fourth The radio bearer is used to transmit the interaction information between the second terminal device and the access network device, and the fourth bearer element is used to transmit the interaction between the second terminal device and the access network device information;

    Send a third message to the access network device through the first bearer element of the second radio bearer with the access network device, or send a third message to the access network device through the first radio bearer , Wherein the first bearer element is used to transmit uplink information corresponding to the second terminal device, and the first radio bearer is used to transmit information corresponding to the second terminal device.
21. The method according to claim 20, wherein the third message is used to request resource allocation, and the method further comprises:

    Receive information about the first resource from the access network device through the second bearer element of the second radio bearer, or receive information about the first resource from the access network device through the first radio bearer , The information of the first resource is downlink information corresponding to the second terminal device;

    The information of the first resource is sent to the second terminal device through the fourth radio bearer, or the information of the first resource is sent to the second terminal device through the fourth bearer element.
22. The method according to any one of claims 11-21, wherein the method further comprises:

    Receive a fourth message from the second terminal device through a fifth bearer element, the fourth message is a NAS message, and the fifth bearer element is used to transmit the uplink between the second terminal device and the core network device NAS news;

    The fourth message is forwarded to the access network device through a third bearer element, where the third bearer element is used to transmit an uplink NAS message between the second terminal device and the core network device.
23. A communication method, characterized in that it comprises:

    Sending a fifth message to the first terminal device, where the fifth message includes second relay indication information, and the second relay indication information is used to request the first terminal device to provide a relay service for the second terminal device, And, the second relay indication information is used to determine the first relay indication information sent to the access network device, and the first relay indication information is used to indicate that the first terminal device is in the second terminal Relay service between the device and the access network device;

    Receiving a sixth message from the first terminal device, where the sixth message is used to indicate that a connection with the first terminal device has been established.
24. The method according to claim 23, wherein the method further comprises:

    Receiving second configuration information from the first terminal device, where the second configuration information is the configuration of the second terminal device corresponding to a third radio bearer, and the third radio bearer is used to transmit the second terminal device and Interactive information between the access network devices;

    Send third configuration information to the first terminal device, where the third configuration information includes part or all of the content of the second configuration information, and the third configuration information is used to generate that the first terminal device corresponds to The configuration of the third radio bearer.
25. The method according to claim 23, wherein the method further comprises:

    Receiving fourth configuration information from the first terminal device, where the fourth configuration information includes part or all of the first configuration information, and the first configuration information indicates that the first terminal device corresponds to a third wireless Bearer configuration, the third radio bearer is used to transmit interactive information between the second terminal device and the access network device;

    Generating the configuration of the second terminal device corresponding to the third radio bearer according to the fourth configuration information.
26. The method according to claim 23, wherein the method further comprises:

    Receiving second configuration information from the first terminal device, where the second configuration information is the configuration of the second terminal device corresponding to a third radio bearer, and the third radio bearer is used to transmit the second terminal Interaction information between the device and the access network device.
27. A terminal device, characterized in that it comprises:

    One or more processors;

    One or more memories;

    And one or more computer programs, wherein the one or more computer programs are stored in the one or more memories, and the one or more computer programs include instructions. When executed by one or more processors, the terminal device is caused to execute the method according to any one of claims 11-22, or the terminal device is caused to execute the method according to any one of claims 23 to 26. method.
28. A network device, characterized in that it comprises:

    One or more processors;

    One or more memories;

    And one or more computer programs, wherein the one or more computer programs are stored in the one or more memories, and the one or more computer programs include instructions, when the instructions are executed by the network device When executed by one or more processors, the network device is caused to execute the method according to any one of claims 1-10.
29. A computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer can execute any one of claims 1 to 10 The method described in item, or the computer is caused to execute the method according to any one of claims 11-22, or the computer is caused to execute the method according to any one of claims 23 to 26.
30. A chip, characterized by comprising one or more processors and a communication interface, and the one or more processors are used to read instructions to execute the method according to any one of claims 1 to 10, or to execute The method according to any one of claims 11-22, or the method according to any one of claims 23 to 26 is executed.

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