WO2020220843A1

WO2020220843A1 - Identification information sending and receiving methods, device and apparatus

Info

Publication number: WO2020220843A1
Application number: PCT/CN2020/079068
Authority: WO
Inventors: 王达; 梁靖; 赵亚利
Original assignee: 大唐移动通信设备有限公司
Priority date: 2019-04-30
Filing date: 2020-03-12
Publication date: 2020-11-05
Also published as: CN111867146A; CN111867146B

Abstract

Disclosed in the present application are identification information sending and receiving methods, a device, and an apparatus, comprising: a first terminal establishes a communication connection with a second terminal; the first terminal sends identification information of the first terminal to the second terminal, the identification information being used by the second terminal for determining whether the first terminal has already established a communication connection with the second terminal. The second terminal receives the identification information of the first terminal sent by the first terminal and, on the basis of the identification information, the second terminal determines whether a communication connection has already been established with the first terminal. Using the present application, a terminal only needs to maintain a unicast connection and store one copy of the user device context, saving resources.

Description

Method, equipment and device for sending and receiving identification information

Cross references to related applications

This application requires the priority of a Chinese patent application filed with the Chinese Patent Office on April 30, 2019, the application number is 201910365381.6, and the application name is "a method, equipment and device for sending and receiving identification information", and the request is in 2019 The priority of the Chinese patent application filed with the Chinese Patent Office on August 14 with the application number 201910750450.5 and the application title is "a method, equipment and device for sending and receiving identification information", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of wireless communication technology, and in particular to a method, equipment and device for sending and receiving identification information.

Background technique

For the direct communication of the Long Term Evolution (LTE) system, direct communication between devices is allowed between devices. Figure 1 is a schematic diagram of Vehicle to Everything (V2X) communication. As shown in the figure, for ease of description, the direct communication link between the device and the device is defined as a direct communication (Sidelink, SL) link, and its corresponding The wireless interface is called the direct communication interface (also called the Sidelink interface); the cellular communication link between the network and the direct communication device is called the Uu link, and the corresponding interface is called the Uu interface.

The devices for direct communication can also be all on the network, or all off the network, or some devices can be on the network and some devices can be off the network. The so-called online device that participates in direct communication is located within the communication carrier coverage of the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) base station. The so-called offline means that the devices participating in direct communication are not within the 3GPP base station communication carrier coverage.

In Next Generation Radio (NR), typical direct communication scenarios include the following three types:

One-to-one communication (unicast) between direct communication terminals;

A device can send the same data to all devices in a communication group at a time (multicast);

One device can send the same data (broadcast) to all nearby devices at once.

The disadvantage of the prior art is that when multiple unicast connections need to be maintained and managed between two UEs, resources are wasted.

Summary of the invention

This application provides a method, equipment and device for sending and receiving identification information, which is used to reduce resource waste when multiple unicast connections need to be maintained and managed between two UEs.

The embodiment of the present application provides a method for sending identification information, including:

Establishing a communication connection between the first terminal and the second terminal;

The first terminal sends the identification information of the first terminal to the second terminal, where the identification information is used by the second terminal to determine whether the first terminal has established a communication connection with the second terminal.

In an optional implementation manner, the identification information of the first terminal includes one or more of the following information:

The identifier being used by the first terminal, the combination of identifiers being used by the first terminal, and the unique identifier of the first terminal.

In an optional implementation manner, the identifier being used by the first terminal includes all identifiers used when the first terminal establishes a communication connection; or,

The combination of identifiers being used by the first terminal includes: a combination of all identifiers used when the first terminal establishes a communication connection, or identifiers generated by algorithms for all identifiers used when establishing a communication connection; or,

The unique identifier of the first terminal includes one or a combination of the following identifiers: a unique identifier of a network configuration, a pre-configured unique identifier, and a unique identifier assigned by the first terminal.

In an optional implementation manner, when the first terminal sends the identification information of the first terminal to the second terminal, the identification information of the first terminal is sent in at least one of the following ways:

The first terminal sends the identification information of the first terminal to the second terminal when establishing a communication connection, and sends the identification information of the first terminal when establishing a PC5-S connection;

When the first terminal establishes a communication connection, the identification information of the first terminal is sent to the second terminal, and the identification information of the first terminal is sent during the SL RRC connection;

When the first terminal sends the identification information of the first terminal to the second terminal, the identification information of the first terminal is sent when the first terminal sends the capability of the first terminal to the second terminal;

When the first terminal sends the identification information of the first terminal to the second terminal, the identification information of the first terminal is sent when the first terminal requests the second terminal for the capability of the second terminal.

In an optional implementation manner, when the first terminal sends the identification information of the first terminal to the second terminal, if the first terminal and the second terminal sent by the second terminal are received The notification that the connection has been established, or the identification information of the second terminal, further includes one or a combination of the following steps:

The first terminal uses the previously stored capabilities of the second terminal; or,

The first terminal does not store the capabilities of the second terminal;

and / or

When the first terminal sends the identification information of the first terminal when requesting the second terminal for the capabilities of the second terminal, if the notification sent by the second terminal that the first terminal and the second terminal have established a connection is received, or The identification information of the second terminal further includes one or a combination of the following steps:

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal does not store the capabilities of the second terminal.

In an optional implementation manner, the identification information of the first terminal is sent when the PC5-S connection is established, and the first terminal sends the identification information of the first terminal in a connection establishment request message; or, A terminal sends the identification information of the first terminal in a connection establishment acceptance message.

In an optional implementation manner, the first terminal sends the first terminal identification information in a connection establishment acceptance message, and after receiving a notification sent by the second terminal that the first terminal and the second terminal have established a connection, or When describing the identification information of the second terminal, it further includes one or a combination of the following steps:

The first terminal does not establish an SL RRC connection with the second terminal; or,

The first terminal transmits service information to the second terminal through a communication connection that has been established with the second terminal; or,

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal; or,

The first terminal does not establish a PC5-S connection with the second terminal.

In an optional implementation manner, the first terminal sends the first terminal identification information in the connection establishment request message, and upon receiving the notification sent by the second terminal that the first terminal and the second terminal have established a connection, or the first terminal When the identification information of the second terminal is used, it further includes one or a combination of the following steps:

In an optional implementation manner, the identification information of the first terminal is sent when the SL RRC connection is established, and the first terminal sends the identification information of the first terminal in the SL RRC connection establishment request message; or, The first terminal sends the identification information of the first terminal in the SL RRC connection establishment message.

In an optional implementation manner, the first terminal sends the first terminal identification information in the SL RRC connection establishment request message, and if it receives a notification sent by the second terminal that the first terminal and the second terminal have established a connection, Or the identification information of the second terminal, further comprising one of the following steps or a combination thereof:

In an optional implementation manner, the SL RRC connection establishment message further includes one of the following contents or a combination thereof:

The identity of the first terminal sent by the first terminal in the SL RRC connection establishment request; or,

The identities of the first terminal and the second terminal used when the second terminal establishes a connection with the first terminal; or,

Instruction information to terminate the RRC connection.

In an optional implementation manner, the first terminal sends the first terminal identification information in the connection establishment message, if it receives a notification sent by the second terminal that the first terminal and the second terminal have established a connection, or the second terminal The identification information of the terminal further includes one or a combination of the following steps:

In an optional implementation manner, the SL RRC connection establishment complete message includes one of the following contents or a combination thereof:

The identity of the first terminal sent by the first terminal in the SL RRC connection establishment message; or,

Instruction information to terminate the RRC connection.

In an optional implementation manner, when it is determined that the first terminal has established a communication connection with the second terminal, the method further includes:

The first terminal transmits service information to the second terminal in a MAC PDU, and the service information includes the service information and new information transmitted in the communication connection established between the first terminal and the second terminal Business information.

The embodiment of the application provides a method for receiving identification information, including:

The second terminal receives the identification information of the first terminal sent by the first terminal, where the identification information is used by the second terminal to determine whether the first terminal has established a communication connection with the second terminal;

The second terminal determines whether a communication connection with the first terminal has been established according to the identification information.

The combination of identifiers being used by the first terminal includes: a combination of all the identifiers used by the first terminal when establishing a communication connection, or an algorithm generated by a combination of all identifiers used when establishing a communication connection; or,

In an optional implementation manner, when the second terminal receives the identification information of the first terminal sent by the first terminal, the identification information of the first terminal is received in at least one of the following ways:

The second terminal receives the identification information of the first terminal sent by the first terminal, which is the identification information of the first terminal sent by the first terminal when the PC5-S connection is established;

The second terminal receives the identification information of the first terminal sent by the first terminal, which is the identification information of the first terminal sent when the first terminal establishes an SL RRC connection;

The second terminal receives the identification information of the first terminal of the first terminal, which is the identification information of the first terminal sent when the first terminal sends the capability of the first terminal to the second terminal;

The second terminal receives the identification information of the first terminal sent by the first terminal, which is the identification information of the first terminal sent when the first terminal requests the second terminal for the capability of the second terminal.

In an optional implementation manner, when the first terminal sends the identification information of the first terminal when the capability of the first terminal is sent to the second terminal, if the second terminal determines the first terminal according to the identification information, When the terminal has established a communication connection with the second terminal, it further includes one or a combination of the following steps:

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

The second terminal does not send the capabilities of the second terminal to the first terminal; or,

The second terminal uses the previously stored capabilities of the first terminal; or,

The second terminal does not store the capabilities of the first terminal;

and / or

When the identification information of the first terminal is sent when the first terminal requests the second terminal for the capabilities of the second terminal, if the second terminal determines according to the identification information that the first terminal has established a connection with the second terminal When the communication connection is established, it further includes one of the following steps or a combination:

The second terminal does not store the capabilities of the first terminal.

In an optional implementation manner, when the second terminal determines according to the identification information that the first terminal has established a communication connection with the second terminal, it further includes one of the following steps or a combination thereof:

Notifying the second terminal not to establish an SL RRC connection with the first terminal; or,

Notifying the second terminal not to send the capabilities of the second terminal to the first terminal; or,

Notifying the second terminal to transmit service information to the first terminal through the communication connection that has been established with the first terminal; or,

The second terminal uses the identifier of the second terminal to transmit service information to the first terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal; or,

The second terminal does not establish a PC5-S connection with the first terminal.

In an optional implementation manner, when an SL RRC connection is established to send the identification information of the first terminal, the first terminal sends the identification information of the first terminal in an SL RRC connection establishment request message; or, The first terminal sends the identification information of the first terminal in the SL RRC connection establishment message.

In an optional implementation manner, the first terminal sends the identification information of the first terminal through an SL RRC connection establishment request message, and it is determined according to the identification information of the first terminal that the first terminal has already communicated with the first terminal. When the second terminal establishes a communication connection, it further includes one or a combination of the following steps:

The second terminal does not establish an SL RRC connection with the first terminal; or,

The second terminal transmits service information to the first terminal through the communication connection established with the first terminal; or,

The second terminal uses the identifier of the second terminal to transmit service information to the first terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal.

Instruction information to terminate the RRC connection.

In an optional implementation manner, the first terminal is sent through an SL RRC connection establishment message, and when it is determined according to the identification information of the first terminal that the first terminal has established a communication connection with the second terminal, further Include one or a combination of the following steps:

In an optional implementation manner, the SL RRC connection establishment complete message includes one or a combination of the following:

The first terminal ID sent by the first terminal in the SL RRC connection establishment message; or,

Instruction information to terminate the RRC connection.

An embodiment of the application provides a first terminal device, including:

The processor is used to read the program in the memory and execute the following process:

When the first terminal establishes a communication connection with the second terminal, the identification information of the first terminal is sent to the second terminal, where the identification information is used by the second terminal to determine whether the first terminal has communicated with the first terminal. The two terminals establish a communication connection;

Transceiver, used to receive and send data under the control of the processor.

The combination of identifiers being used by the first terminal includes: a combination of all identifiers used by the first terminal when establishing a communication connection, or identifiers generated by algorithms for all identifiers used when establishing a communication connection; or,

The first terminal sends the identification information of the first terminal to the second terminal when establishing a communication connection, and sends the identification information of the first terminal when establishing an SL RRC connection;

The first terminal does not store the capabilities of the second terminal;

and / or

The first terminal does not store the capabilities of the second terminal.

In an optional implementation manner, the first terminal sends the first terminal identification information in the connection establishment acceptance message, if it receives a notification from the second terminal that the first terminal and the second terminal have established a connection, or When describing the identification information of the second terminal, it further includes one or a combination of the following steps:

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal.

Instruction information to terminate the RRC connection.

An embodiment of the present application provides a second terminal device, including:

After receiving the identification information of the first terminal sent by the first terminal, it is determined according to the identification information whether a communication connection with the first terminal has been established, and the identification information is used by the second terminal to determine the Whether the first terminal has established a communication connection with the second terminal;

Transceiver, used to receive and send data under the control of the processor.

The second terminal does not store the capabilities of the first terminal;

and / or

The second terminal does not store the capabilities of the first terminal.

Instruction information to terminate the RRC connection.

The identification information of the first terminal sent by the first terminal in the SL RRC connection establishment message; or,

Instruction information to terminate the RRC connection.

The embodiment of the present application provides an identification information sending device, including:

The communication connection module is used for establishing a communication connection between the first terminal and the second terminal;

A sending module, configured to send identification information of the first terminal to a second terminal on the first terminal, where the identification information is used by the second terminal to determine whether the first terminal has established a connection with the second terminal Communication connection.

In an optional implementation manner, the sending module is specifically configured to send the identification information of the first terminal in at least one of the following ways:

When the communication connection is established, the identification information of the first terminal is sent to the second terminal, and the identification information of the first terminal is sent when the PC5-S connection is established;

When the communication connection is established, the identification information of the first terminal is sent to the second terminal, and the identification information of the first terminal is sent when the SL RRC connection is established;

Sending the identification information of the first terminal to the second terminal is sent when the first terminal sends the capability of the first terminal to the second terminal;

Sending the identification information of the first terminal to the second terminal is sent when the first terminal requests the second terminal for the capability of the second terminal.

In an optional implementation manner, when sending the identification information of the first terminal when sending the capability of the first terminal to the second terminal, the sending module is further configured to: if the first terminal sent by the second terminal is received When the terminal has established a connection with the second terminal, or the identification information of the second terminal, use the previously stored capabilities of the second terminal; or,

Does not store the capabilities of the second terminal; and/or

When sending the identification information of the first terminal when requesting the capability of the second terminal from the second terminal, the sending module is further configured to: if a connection is established between the first terminal and the second terminal sent by the second terminal is received Do not send the capabilities of the first terminal to the second terminal when the notification or the identification information of the second terminal is used; or,

Use the previously stored capabilities of the second terminal; or,

The capabilities of the second terminal are not stored.

In an optional implementation manner, when the PC5-S connection is established, the identification information of the first terminal is sent in a connection establishment request message; or, when the connection is established Receiving the identification information of the first terminal sent in the message.

In an optional implementation manner, the first terminal identification information is sent in a connection establishment acceptance message, after receiving a notification sent by the second terminal that the first terminal and the second terminal have established a connection, or the second terminal When the identification information of the terminal is used, the sending module is also used to:

Does not establish an SL RRC connection with the second terminal; or,

Do not send the capabilities of the first terminal to the second terminal; or,

Transmit service information to the second terminal through the communication connection that has been established with the second terminal; or,

Use the identifier of the second terminal to transmit service information to the second terminal, where the identifier of the second terminal is that of the second terminal used in the communication connection that the first terminal has established with the second terminal Logo; or,

Do not establish a PC5-S connection with the second terminal.

In an optional implementation manner, the first terminal identification information is sent in the connection establishment request message, and the sending module is further configured to: upon receiving a notification sent by the second terminal that the first terminal and the second terminal have established a connection , Or when the identification information of the second terminal, does not establish an SL RRC connection with the second terminal; or,

Do not send the capabilities of the first terminal to the second terminal; or,

Do not establish a PC5-S connection with the second terminal.

In an optional implementation manner, when the identification information of the first terminal is sent when the SL RRC connection is established, the sending module is specifically configured to:

The identification information of the first terminal is sent in the SL RRC connection establishment request message; or the identification information of the first terminal is sent in the SL RRC connection establishment message.

In an optional implementation manner, the first terminal identification information is sent in the SL RRC connection establishment request message, and the sending module is further configured to: after receiving the first terminal and the second terminal sent by the second terminal Not to establish an SL RRC connection with the second terminal when the notification of the connection is established or the identification information of the second terminal; or,

Do not send the capabilities of the first terminal to the second terminal; or,

Do not establish a PC5-S connection with the second terminal.

The identity of the first terminal sent in the SL RRC connection establishment request; or,

Instruction information to terminate the RRC connection.

In an optional implementation manner, the first terminal identification information is sent in the connection establishment message, and the sending module is further configured to: upon receiving a notification sent by the second terminal that the first terminal and the second terminal have established a connection, Or when the identification information of the second terminal is used, no SL RRC connection is established with the second terminal; or,

Do not send the capabilities of the first terminal to the second terminal; or,

Do not establish a PC5-S connection with the second terminal.

The identity of the first terminal sent in the SL RRC connection establishment message; or,

Instruction information to terminate the RRC connection.

In an optional implementation manner, the sending module is further configured to: when it is determined that the first terminal has established a communication connection with the second terminal, transmit service to the second terminal in a MAC PDU Information, the service information includes service information and new service information transmitted in the communication connection established between the first terminal and the second terminal.

The embodiment of the present application provides an identification information receiving device, including:

The receiving module is configured to receive the identification information of the first terminal sent by the first terminal on the second terminal, where the identification information is used by the second terminal to determine whether the first terminal has communicated with the second terminal Established a communication connection;

The connection judgment module is configured to determine whether the second terminal has established a communication connection with the first terminal according to the identification information.

The unique identifier of the first terminal includes one or a combination of the following identifiers: a unique identifier for network configuration, a pre-configured unique identifier, and a unique identifier assigned by the first terminal.

In an optional implementation manner, the receiving module is specifically configured to receive the identification information of the first terminal in at least one of the following ways:

Receiving the identification information of the first terminal sent when the first terminal establishes a communication connection is the identification information of the first terminal sent when the first terminal establishes a PC5-S connection;

Receiving the identification information of the first terminal sent by the first terminal when establishing a communication connection is the identification information of the first terminal sent when the first terminal establishes an SL RRC connection;

Receiving the identification information of the first terminal sent by the first terminal is the identification information of the first terminal sent when the first terminal sends the capability of the first terminal to the second terminal;

The identification information of the first terminal that is received by the first terminal is the identification information of the first terminal that is sent when the first terminal requests the second terminal for the capability of the second terminal.

In an optional implementation manner, when the first terminal sends the identification information of the first terminal when the capability of the first terminal is sent to the second terminal, the connection judgment module is further configured to: When the information determines that the first terminal has established a communication connection with the second terminal, notify the first terminal that the second terminal has established a communication connection with the first terminal; or,

Sending to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Use the previously stored capabilities of the first terminal; or,

Not storing the capabilities of the first terminal;

and / or

When the identification information of the first terminal is sent when the first terminal requests the second terminal's capabilities from the second terminal, the connection judgment module is further configured to: if it is determined according to the identification information that the first terminal has been connected to When the second terminal establishes a communication connection, notify the first terminal that the second terminal has established a communication connection with the first terminal; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Use the previously stored capabilities of the first terminal; or,

The capabilities of the first terminal are not stored.

In an optional implementation manner, the connection judgment module is further configured to: when it is determined according to the identification information that the first terminal has established a communication connection with the second terminal, notify the first terminal The second terminal has established a communication connection with the first terminal; or,

Does not establish an SL RRC connection with the first terminal; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Transmit service information to the first terminal through the communication connection that has been established with the first terminal; or,

Use the identifier of the second terminal to transmit service information to the first terminal, where the identifier of the second terminal is that of the second terminal used in the communication connection that the first terminal has established with the second terminal Logo; or,

Do not establish a PC5-S connection with the first terminal.

In an optional implementation manner, the first terminal sends the identification information of the first terminal through an SL RRC connection establishment request message, and the connection determination module is further configured to: determine the identification information of the first terminal according to the identification information of the first terminal. When the first terminal has established a communication connection with the second terminal, notify the first terminal that the second terminal has established a communication connection with the first terminal; or,

Does not establish an SL RRC connection with the first terminal; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Use the identifier of the second terminal to transmit service information to the first terminal, where the identifier of the second terminal is that of the second terminal used in the communication connection that the first terminal has established with the second terminal Logo.

Instruction information to terminate the RRC connection.

In an optional implementation manner, the first terminal is sent through an SL RRC connection establishment message, and the connection judgment module is further configured to: determine according to the identification information of the first terminal that the first terminal has communicated with the When the second terminal establishes a communication connection, notify the first terminal that the second terminal has established a communication connection with the first terminal; or,

Does not establish an SL RRC connection with the first terminal; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Instruction information to terminate the RRC connection.

In an optional implementation manner, when it is determined that the first terminal has established a communication connection with the second terminal, the first terminal transmits service information to the second terminal in one MAC PDU, so The service information includes service information and new service information transmitted in the communication connection established between the first terminal and the second terminal.

The embodiment of the present application provides a computer-readable storage medium, and the computer-readable storage medium stores a computer program that executes the foregoing identification information sending or receiving method.

The beneficial effects of this application are as follows:

In the technical solution provided by the embodiments of the present application, since two terminals will give their own identification information when establishing a connection, the opposite terminal can determine whether a connection has been established, so that the two UEs in the communication connection are A unique communication connection can be established between each other, and further, only one communication connection needs to be maintained and a copy of the UE context is stored, which reduces the complexity of the UE and saves resources.

Description of the drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The exemplary embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation of the application. In the attached picture:

FIG. 1 is a schematic diagram of V2X communication in the background technology;

2 is a schematic diagram of a unicast connection establishment process at the NAS layer in an embodiment of the application;

Fig. 3 is a schematic diagram of a unicast connection establishment process at the AS layer in an embodiment of the application;

FIG. 4 is a schematic diagram of an implementation process of a method for sending identification information on a first terminal in an embodiment of this application;

Fig. 5 is a schematic diagram of an implementation process of a method for receiving identification information on a second terminal in an embodiment of this application;

FIG. 6 is a schematic diagram of the implementation flow 1 of the user identification process in an embodiment of the application;

FIG. 7 is a schematic diagram of the implementation flow 2 of the user identification process in an embodiment of the application;

FIG. 8 is a schematic diagram of the implementation flow 3 of the user identification process in an embodiment of the application;

FIG. 9 is a schematic diagram of the implementation process 4 of the user identification process in an embodiment of the application;

FIG. 10 is a schematic diagram of the implementation flow 5 of the user identification process in an embodiment of the application;

FIG. 11 is a schematic structural diagram of a first terminal device in an embodiment of this application;

FIG. 12 is a schematic structural diagram of a second terminal device in an embodiment of this application;

FIG. 13 is a schematic structural diagram of a first terminal device in an embodiment of the application;

FIG. 14 is a schematic structural diagram of a second terminal device in an embodiment of this application.

Detailed ways

The inventor noticed during the invention process:

Communication connection establishment process: including the non-access stratum (Non Access Stratum, NAS) layer communication connection establishment process, namely the direct communication interface signaling (PC5 signalling, PC5-S) connection establishment process, and the access layer (Access Stratum, The communication connection establishment process at the AS layer, that is, the direct link radio resource control signaling (Sidelink Radio Resource Control, SL RRC) connection establishment process. In the following, this application takes the direct link unicast scenario as an example to describe the above two connection establishment procedures respectively. It should be noted that for other scenarios of the direct link, such as the multicast scenario, there are similar connection establishment procedures, which will not be repeated here; in addition, the above two connection establishment procedures can be established at the same time or separately. Independent establishment, or only one communication connection may be established, for example, only the NAS layer communication connection or only the AS layer communication connection is established, which is not limited in this application.

Figure 2 is a schematic diagram of the unicast connection establishment process at the NAS layer. The unicast connection establishment process at the NAS layer mainly includes PC5-S signaling (that is, step 203 and step 204 in the figure), as shown in the figure, and the details are as follows:

Step 201: A user equipment (User Equipment, UE) determines a purpose identifier (Identity, ID) used to receive V2X unicast connection establishment signaling, where the target ID is related to the V2X service.

Step 202: The application layer instructs UE1 to perform the V2X unicast service.

Step 203: UE1 sends the V2X unicast connection establishment process by broadcasting, where the direct communication request (Direct Communication Request) information includes:

A) V2X business related information;

B) The destination ID is related to the V2X service that initiates the establishment of the connection;

C) Source ID, the ID of UE1, which is allocated by UE1 according to the required V2X service;

i. In order to prevent tracking, the UE needs to independently change the source Layer-2 ID (source Layer-2 ID), and it is changed randomly. A UE can have multiple source Layer-2 IDs;

ii. If the source ID changes, the UE needs to inform the peer UE that has established a connection with it.

Step 204: If the receiving UE is judged according to the destination ID, if it is determined that it is interested in the establishment of the service connection initiated by the UE1, it will reply with the Direct Communication Accept information of the UE1, which includes the ID of the receiving UE, for example The ID of UE2 in Figure 2 is allocated by UE2 according to the required V2X service.

Step 205: The UE mainly exchanges the IDs of both parties through the previously established connection, and performs subsequent unicast service transmission. The transmission of the unicast service needs to use the IDs of both parties to clarify which UE the message is sent to.

Figure 3 is a schematic diagram of the process of establishing a unicast connection at the AS layer. As shown in the figure, a possible process of establishing a unicast connection at the AS layer is:

Based on the IDs of UE1 and UE2, UE1 sends a direct link radio resource control connection establishment request (Sidelink RRC setup request; radio resource control: Radio Resource Control, RRC), and UE2 replies to the direct link radio resource control connection establishment (Sidelink RRC setup) , UE1 confirms that the establishment of the direct link radio resource control connection is completed (Sidelink RRC setup complete).

As mentioned earlier, the UE ID is randomly assigned by the UE itself according to different service requirements, and needs to be updated at intervals. The same UE may have multiple different UE IDs based on different services. Therefore, if the existing unicast connection establishment process is followed, a UE may also establish multiple unicast connections with another UE based on different services, that is, multiple unicast connections at the NAS layer or unicast connections at the AS layer. In other words, for a UE, it does not know that it has established multiple unicast connections with another UE, because the ID of the opposite UE is different, and the UE can only think that it has established different unicast connections with multiple UEs. However, it is actually establishing multiple different unicast connections with the same UE.

In this way, multiple unicast connections need to be maintained and managed between two UEs, for example, multiple PC5-S connections or multiple RRC connections, multiple signaling radio bearer 1 (Signalling Radio Bearer1, SRB1), multiple data A radio bearer (Data Radio Bearer, DRB), etc., stores multiple copies of the same UE context (for example, the capability of the peer UE), which causes a waste of resources.

In summary, in the traditional LTE system, the direct communication interface services only support broadcast services. For New Radio (NR), the direct communication interface services will be more abundant than LTE. In addition to supporting broadcast services, Support unicast and multicast services. For unicast services, a unicast connection needs to be established between two UEs to transmit unicast services, including control information and data information. The establishment of a unicast connection between two UEs needs to be established according to the UE ID. At present, the UE ID is randomly assigned by the UE itself according to different service requirements, and needs to be updated at intervals. Therefore, the same UE may have multiple different UE IDs based on different services. A UE may also establish multiple unicast connections with another UE based on different services. The UEs also need to maintain and manage multiple unicast connections. Connecting, storing multiple copies of UE context (for example, peer UE capabilities), resulting in waste of resources.

Based on this, the embodiments of this application provide a solution for identifying users, which can uniquely identify users, so that in V2X unicast services, even if two UEs perform different V2X services, only one unicast connection needs to be established. Therefore, only one unicast connection needs to be maintained and managed, a copy of the UE context is stored, and resource overhead is saved.

The specific implementation of the present application will be described below with reference to the drawings.

In the description process, the description will be made from the implementation of the first terminal and the second terminal respectively, and then an example of the implementation of the two will also be given to better understand the implementation of the solutions given in the embodiments of this application. This way of explanation does not mean that the two must be implemented in cooperation or separately. In fact, when the first terminal and the second terminal are implemented separately, the problems of the first terminal and the second terminal can also be solved separately. When the two are used in combination, better technical results will be obtained.

In the description process, the first terminal will take UE1 and the second terminal UE2 as examples.

First, the implementation on the first terminal is explained, and then the implementation on the second terminal is explained. Then, the implementation of how the two cooperates is explained by using UE1 and UE2 as examples. Finally, the direct connection system of NR is explained as an example. .

It should be noted that the first terminal is not completely equal to UE1, and the second terminal is not completely equal to UE2. When describing the first terminal and the second terminal, the first terminal is always the terminal that sends its own identity, and the second terminal It is always the terminal that receives the identity; and in order to better understand the sending and receiving on a terminal and the interaction with the other party, when describing in terms of UE1 and UE2, either UE1 or UE2 may both send its own identity and receive the other party’s identity The behavior of is easy to understand. In fact, the sending identification and the receiving identification can be executed by the same terminal.

Fig. 4 is a schematic diagram of an implementation process of a method for sending identification information on a first terminal. As shown in the figure, it may include:

Step 401: The first terminal establishes a communication connection with the second terminal.

Step 402: The first terminal sends identification information of the first terminal to the second terminal, where the identification information is used by the second terminal to determine whether the first terminal has established a communication connection with the second terminal.

In implementation, this solution is not limited to unicast connections. Multicast actually has similar problems, so it can also be applied to multicast. In the same way, as long as there are connections with similar problems, this solution can be used, that is, the same The UE may have multiple different UE IDs based on different services. This solution can be used when a UE may establish multiple connections with another UE based on different services. The following embodiments will mainly use unicast It is explained as an example, but it is obviously not limited to a unicast scenario, and it can be used in other scenarios after appropriate improvements made by those skilled in the art.

In implementation, the identification information of the first terminal includes one or more of the following information:

In implementation, the identifier being used by the first terminal includes all identifiers used when the first terminal establishes a communication connection; or,

The combination of identifiers being used by the first terminal includes: a combination of all identifiers used by the first terminal when establishing a communication connection, or an algorithm generated by a combination of all identifiers used when establishing a communication connection; or,

Wherein, for the case where the identifier being used by the first terminal includes all the identifiers being used when the first terminal establishes a communication connection, that is, the ID used when the first terminal establishes a connection with other terminals before, it is possible to establish a connection with the second terminal When it is not used, there is no need to send the ID. For example, the ID used by UE1 includes ID1, ID2, ID3, and ID4 will be used when UE1 establishes a connection with UE2, but when UE1 establishes a connection with UE2, ID1 is no longer used (maybe ID1 has been updated or used The connection established by ID1 is released, etc.), then UE1 only needs to send ID2, ID3, and ID4 to UE2, that is, ID2, ID3, and ID4 are the IDs being used when the first terminal establishes a connection with the second terminal. In other words, those skilled in the art can easily understand that the ID here is essentially an ID that helps the second terminal to determine whether a connection has been established.

The pre-configured unique identifier may include: pre-defined by the agreement, pre-configured by the equipment manufacturer, pre-allocated by the operator, pre-allocated by the standards organization, and so on.

In implementation, the first terminal sends the identification information of the first terminal to the second terminal by using at least one of the following methods to send the identification information of the first terminal:

When the first terminal establishes a communication connection, the identification information of the first terminal is sent to the second terminal, and the identification information of the first terminal is sent when the PC5-S connection is established;

In implementation, when the first terminal sends the identification information of the first terminal when sending the capabilities of the first terminal to the second terminal, if the notification sent by the second terminal that the first terminal has established a connection with the second terminal is received, or the first terminal When the identification information of the second terminal is used, it further includes one or a combination of the following steps:

The first terminal does not store the capabilities of the second terminal;

and / or

When the first terminal sends the identification information of the first terminal when requesting the second terminal for the capabilities of the second terminal, if it receives a notification from the second terminal that the first terminal and the second terminal have established a connection, or the second terminal’s When identifying information, it further includes one or a combination of the following steps:

The first terminal does not store the capabilities of the second terminal.

In a specific implementation, the identification information of the first terminal is sent when the connection is established through the PC5-S, and the first terminal is sent in a connection establishment request message, for example, sent by a direct communication request message (Direct Communication Request message); or, The Direct Communication Request message sent in the scheduling assignment information (Scheduling assignment, SA) process, of course, can also be sent in other messages, which is not limited in this application;

The first terminal is sent in the connection establishment acceptance message, for example, after receiving the Direct Communication Request message, it is sent in the Direct Communication Accept message (Direct Communication Accept message); or, after receiving the Direct Communication Request message in the SA process , Sent in Direct Communication Accept message, of course, can also be sent in other messages, this application is not limited;

The first terminal is sent in a message that sends the capabilities of the first terminal to the second terminal, for example, in an RRC message that sends capabilities. Of course, it can also be sent in other messages, which is not limited in this application;

The first terminal is sent in a message that requests the second terminal's capabilities from the second terminal, for example, in an RRC message that requests the second terminal's capabilities. Of course, it can also be sent in other messages, which is not limited in this application.

In implementation, the identification information of the first terminal is sent when the PC5-S connection is established. The first terminal sends the identification information of the first terminal in the connection establishment request message; or, the first terminal sends it in the connection establishment acceptance message Identification information of the first terminal.

In implementation, the first terminal sends the first terminal identification information in the connection establishment acceptance message. If it receives a notification sent by the second terminal that the first terminal and the second terminal have established a connection, or the identification information of the second terminal, further Include one or a combination of the following steps:

The first terminal does not establish an SL RRC connection with the second terminal. Specifically, the connection is an AS layer and/or NAS layer connection; or,

The first terminal does not send the capabilities of the first terminal to the second terminal, specifically, does not send the capabilities of the first terminal at the AS layer and/or NAS layer; or,

The first terminal transmits service information to the second terminal through the communication connection that has been established with the second terminal. Specifically, when transmitting service information, the identifiers of the first terminal and the second terminal used may be, the first terminal and the second terminal The identification of the first terminal and the second terminal used in the communication connection that the first terminal has established with the second terminal, or the identification of the communication connection that the first terminal has established with the second terminal; or,

The first terminal uses the identity of the second terminal to transmit service information to the second terminal. The identity of the second terminal is the identity of the second terminal used in the communication connection established between the first terminal and the second terminal. Specifically, the transmission service For information, the identifiers of the first terminal and the second terminal used may be the identifiers of the first terminal and the second terminal used by the first terminal and the second terminal in the communication connection that the first terminal has established with the second terminal; or,

In implementation, the first terminal sends the first terminal identification information in the connection establishment request message, and when receiving the notification sent by the second terminal that the first terminal and the second terminal have established a connection, or the identification information of the second terminal, It may further include one or a combination of the following steps:

The first terminal transmits service information to the second terminal through the communication connection that has been established with the second terminal. The specific service information transmission method is as described above, and will not be repeated here; or,

The first terminal uses the identity of the second terminal to transmit service information to the second terminal. The identity of the second terminal is the identity of the second terminal used in the communication connection established between the first terminal and the second terminal. The specific service information is transmitted The method is as described above and will not be repeated here; or,

Wherein, the second terminal identifier sent by the second terminal when the communication connection with the first terminal has been established can be sent in the connection establishment acceptance message, specifically, for example, sent in the Direct Communication Accept message. It can also be understood that the second terminal may also send to the first terminal a notification that the first terminal and the second terminal have established a connection, and the notification may be sent in a connection establishment acceptance message, specifically, for example, sent in a Direct Communication Accept message. For the content sent by the second terminal, as long as the first terminal can confirm that the first terminal and the second terminal have established a communication connection, the specific content is not specifically limited in this application.

In implementation, the identification information of the first terminal is sent when the SL RRC connection is established, and the first terminal sends the identification information of the first terminal in the SL RRC connection establishment request message; or, the first terminal is in the SL RRC connection establishment message The identification information of the first terminal is sent in.

The first terminal sends the first terminal identification information in the SL RRC connection establishment request message, and when receiving the notification sent by the second terminal that the first terminal and the second terminal have established a connection, or the identification information of the second terminal, it further includes One of the following steps or a combination:

The first terminal uses the identity of the second terminal to transmit service information to the second terminal. The identity of the second terminal is the identity of the second terminal used in the communication connection established between the first terminal and the second terminal. The specific service information is transmitted The method is as described above and will not be repeated here.

During implementation, the SL RRC connection establishment message further includes one of the following contents or a combination of:

Instruction information to terminate the RRC connection.

In implementation, the first terminal sends the first terminal identification information in the connection establishment message, and upon receiving the notification sent by the second terminal that the first terminal and the second terminal have established a connection, or the identification information of the second terminal, it further includes One of the following steps or a combination:

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal. The identifier of the second terminal is the identifier of the second terminal used in the communication connection established by the first terminal and the second terminal. The information transmission method is as described above and will not be repeated here.

The notification sent by the second terminal that the first terminal and the second terminal have established a connection may be notified through a connection establishment completion message, for example, through a Sidelink RRC setup complete message notification.

In implementation, the SL RRC connection establishment complete message may include one of the following or a combination of:

Instruction information to terminate the RRC connection.

Specifically, the SL RRC connection establishment complete message may be a Sidelink RRC setup complete message, the identity of the first terminal sent by the first terminal in the Sidelink RRC setup request.

In implementation, when it is determined that the first terminal has established a communication connection with the second terminal, it further includes:

The first terminal transmits service information to the second terminal in a Media Access Control (MAC) protocol data unit (Protocol Data Unit, PDU), and the service information includes the communication established between the first terminal and the second terminal The business information and new business information transmitted in the connection. Among them, the new service information can be understood as the service information to be transmitted when the first terminal establishes a communication connection with the second terminal this time.

Specifically, the two types of service information can use the same terminal ID or different terminal IDs, but both can be transmitted in one MAC PDU.

The following describes the implementation of the corresponding second terminal. It should be noted that since the behavior of the second terminal corresponds to the first terminal, the use of messages in the implementation can refer to the implementation of the first terminal, or The corresponding improvements will not be explained one by one in the following description.

Fig. 5 is a schematic diagram of an implementation process of a method for receiving identification information on a second terminal. As shown in the figure, it may include:

Step 501: The second terminal receives the identification information of the first terminal sent by the first terminal, where the identification information is used for the second terminal to determine whether the first terminal has established a communication connection with the second terminal;

Step 502: The second terminal determines whether a communication connection has been established with the first terminal according to the identification information.

Wherein, for the case where the identifier being used by the first terminal includes all the identifiers used when the first terminal establishes a communication connection, the ID used when the first terminal previously established a connection with other terminals may be used when establishing a connection with the second terminal. If you don’t use it, you don’t need to send the ID. For example, the previously used IDs of UE1 include ID1, ID2, ID3, and ID4 will be used when UE1 establishes a connection with UE2, but when UE1 establishes a connection with UE2, ID1 is no longer used (maybe ID1 has been updated or used The connection established by ID1 is released, etc.), then UE1 only needs to send ID2, ID3, and ID4 to UE2, that is, ID2, ID3, and ID4 are the IDs being used when the first terminal establishes a connection with the second terminal. In other words, those skilled in the art can easily understand that the ID here is essentially an ID that helps the second terminal to determine whether a connection has been established.

In implementation, the second terminal receives the identification information of the first terminal sent by the first terminal, and receives the identification information of the first terminal in at least one of the following ways:

In implementation, when the first terminal sends the identification information of the first terminal to the second terminal when the capability of the first terminal is sent, if the second terminal determines according to the identification information that the first terminal has established a communication connection with the second terminal, It further includes one or a combination of the following steps:

The second terminal informs the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends the second terminal identifier when the communication connection with the first terminal has been established to the first terminal; or,

The second terminal does not store the capabilities of the first terminal;

and / or

When the first terminal sends the identification information of the first terminal when requesting the second terminal's capabilities from the second terminal, if the second terminal determines according to the identification information that the first terminal has established a communication connection with the second terminal, it further includes the following One of the steps or a combination:

The second terminal does not store the capabilities of the first terminal.

In implementation, when the PC5-S connection is established, the identification information of the first terminal is sent. The first terminal sends the identification information of the first terminal in the connection establishment request message. For example, the first terminal sends it through Direct Communication Request message Or, the first terminal is sent through the Direct Communication Request message in the SA process, of course, it can also be sent in other messages, which is not limited in this application.

The first terminal sends the identification information of the first terminal in the connection establishment acceptance message. For example, the first terminal sends it through Direct Communication Accept message; or, the first terminal sends it through Direct Communication Accept message in the SA process. , Of course, can also be sent in other messages, this application is not limited;

In implementation, when the second terminal determines that the first terminal has established a communication connection with the second terminal according to the identification information, it further includes one of the following steps or a combination thereof:

The second terminal does not establish an SL RRC connection with the first terminal. Specifically, the connection is an AS layer and/or NAS layer connection; or,

The second terminal does not send the capabilities of the first terminal to the first terminal, specifically, does not send the capabilities of the first terminal at the AS layer and/or NAS layer; or,

The second terminal transmits service information to the first terminal through the communication connection established with the first terminal. Specifically, when transmitting the service information, the identifiers of the first terminal and the second terminal used may be, the first terminal and the second terminal The identification of the first terminal and the second terminal used in the communication connection that the first terminal has established with the second terminal, or the identification of the communication connection that the first terminal has established with the second terminal; or,

The second terminal uses the identity of the second terminal to transmit service information to the first terminal. The identity of the second terminal is the identity of the second terminal used in the communication connection established between the first terminal and the second terminal. Specifically, the transmission service For information, the identifiers of the first terminal and the second terminal used may be the identifiers of the first terminal and the second terminal used by the first terminal and the second terminal in the communication connection that the first terminal has established with the second terminal; or,

The second terminal does not establish a PC5-S connection with the first terminal. Specifically, the connection is an AS layer and/or NAS layer connection.

In implementation, when the SL RRC connection is established to send the identification information of the first terminal, the first terminal sends the identification information of the first terminal in the SL RRC connection establishment request message; for example, the first terminal sends the identification information through Sidelink RRC setup request of. or,

The first terminal sends the identification information of the first terminal in the SL RRC connection establishment message. For example, the first terminal sends the identification information through Sidelink RRC setup.

In the implementation, the first terminal sends the identification information of the first terminal through the SL RRC connection establishment request message. When it is determined according to the identification information of the first terminal that the first terminal has established a communication connection with the second terminal, the following steps are further included One or a combination:

The second terminal informs the first terminal that the second terminal has established a communication connection with the first terminal. Specifically, the connection is an AS layer and/or NAS layer connection; or,

The second terminal does not send the capabilities of the first terminal to the first terminal; or,

The second terminal uses the identifier of the second terminal to transmit service information to the first terminal, where the identifier of the second terminal is the identifier of the second terminal used in the communication connection that the first terminal has established with the second terminal; or

Instruction information to terminate the RRC connection.

In the implementation, the first terminal is sent through the SL RRC connection establishment message. When it is determined according to the identification information of the first terminal that the first terminal has established a communication connection with the second terminal, it further includes one of the following steps or a combination thereof:

The second terminal uses the identifier of the second terminal to transmit service information to the first terminal, and the identifier of the second terminal is the identifier of the second terminal used in the communication connection that the first terminal has established with the second terminal; or

In implementation, the SL RRC connection establishment complete message includes one or a combination of the following:

Instruction information to terminate the RRC connection.

The first terminal transmits service information to the second terminal in one MAC PDU, and the service information includes the service information and new service information transmitted in the communication connection established between the first terminal and the second terminal. Among them, the new service information can be understood as the service information to be transmitted when the first terminal establishes a communication connection with the second terminal this time.

In the technical solution provided by the embodiment of the present application, the first terminal sends identification information of the first terminal to the second terminal, and the identification information is used by the second terminal to determine whether the first terminal has established a communication connection with the second terminal. The identification information can be used to identify whether it is the same terminal user.

The identification information of the first terminal may be one or more of the following information: the identification being used by the first terminal, the combination of identification being used by the first terminal, and the unique identification of the first terminal.

The following will take UE1 and UE2 as an example for description.

When UE1 establishes a connection, it sends identification information to the peer UE2. The identification information may be:

1. The identification information sent to the peer UE2 is all the identifications of the communication connection that UE1 has currently established, that is, the identification of the current unicast connection of UE1 is sent to the peer UE2;

2. The identification information sent to the peer UE2 is: a combination of all the identities that UE1 has currently established a communication connection, or an identification generated by an algorithm of all the identities that UE1 has currently established a communication connection, such as a hash (HASH) algorithm . Compared with the previous one, it can save channel resources;

If the identity of the UE is updated, the identity generated by the combination or algorithm will also be updated;

3. The identification information sent to the opposite terminal UE2 is: the unique identifier of UE1, which may be network-configured, pre-configured, or allocated by UE1 itself.

The specific process of transmitting identification information can be as follows:

Solution 1: Transfer when the connection is established through PC5-S.

1. UE1 sends the identification information of UE1 through Direct Communication Request message.

For UE2 side:

UE2 judges whether it has established a connection with UE1 through the received identification information of UE1.

If it is established, UE2 uses the ID of the UE2 that has established a connection with UE1 to reply in the Direct Communication Accept message. You can also perform the following operations:

1) Notify UE2's access layer (Access Layer, AS layer) that there is no need to establish an AS layer connection; there is no need to interact with UE capabilities, because the access layer configuration (AS layer configuration) may need to be based on different service quality ( Quality of Service, QoS) configuration; use the previously established connection to transmit subsequent services;

2) No communication connection at the NAS layer is established; there is also no need to interact with UE capabilities, because the AS layer configuration may need to be configured according to different QoS; use the previously established connection to transmit subsequent services.

1) and 2) are in the relationship of and/or, and either or both can be executed.

For UE1 side:

According to the Direct Communication Accept message sent by UE2, UE1 determines that UE2 is a UE that has established a connection.

1) (corresponding to UE2's 1)): Notify the AS layer of UE1 that there is no need to establish an AS layer connection; and there is no need to interact with UE capabilities, because the AS layer configuration may need to be configured according to different QoS; use the established connection to transmit subsequent business;

2) (corresponding to UE2's 2)): No NAS layer communication connection is established; there is no need to interact with UE capabilities, because the AS layer configuration may need to be configured according to different QoS; use the established connection to transmit subsequent services.

For UE1 and UE2, it can also perform:

Use the established connection to transmit subsequent services, that is, the current service can be transmitted on the communication connection established by UE1 and UE2, with the same destination ID;

Data packets with the same destination ID can be multiplexed in the same MAC PDU for transmission (which can be data packets of different services).

2. UE1 still sends the Direct Communication Request message according to the existing procedure to carry the UE1 identity used for this connection establishment, and UE2 sends the UE2 identity information in the Direct Communication Accept message.

For UE1:

UE1 judges whether UE2 has established a connection according to the Direct Communication Accept message sent by UE2.

If established, then:

1) Notify the AS layer of UE1 that it does not need to establish an RRC connection; nor does it need to interact with UE capabilities. This is because the AS layer configuration may need to be configured according to different QoS; use the established connection to transmit subsequent services;

2) No communication connection at the NAS layer is established; there is no need to interact with UE capabilities, because the AS layer configuration may need to be configured according to different QoS; use the previously established connection to transmit subsequent services;

Further, UE2 can also be notified that the connection has been established, then:

For the above 1), it depends on the AS layer connection establishment process. If UE1 initiates the AS layer connection establishment process, UE2 does not need to be notified;

For the above 2), UE2 needs to be notified that the connection has been established, no NAS-layer communication connection is established, and UE capabilities are not required to be exchanged, and the previously established connection is used to transmit subsequent services.

For UE1 and UE2, it can also perform:

Use the previously established connection to transmit subsequent services, that is, the current service can be transmitted on the communication connection established by UE1 and UE2 before, with the same destination ID;

Data packets sent to the same UE can be multiplexed in the same MAC PDU for transmission (it can be data packets of different services, or data packets with the same destination ID or different destination IDs).

Solution 2: The identification information is transmitted during the establishment of the SL RRC connection.

1. UE1 sends the identification information of UE1 through Sidelink RRC setup request.

For UE2 side:

If it has been established, UE2 uses the UE2 ID that has established a connection with UE1 to reply in Sidelink RRC setup, and informs UE1 that the connection has been established, so that it no longer receives the Sidelink RRC setup complete message; there is no need to establish an RRC connection; nor does it need to Store UE capabilities (AS layer configuration may need to be configured according to different QoS); use the previously established connection to transmit subsequent services.

For UE1 side:

According to the Sidelink RRC setup sent by UE2, UE1 judges that UE2 is a connected UE, so it does not send Sidelink RRC setup complete message; it does not need to establish RRC connection; it does not need to exchange UE capabilities (AS layer configuration may need to be based on different QoS configuration); use the previously established connection to transmit subsequent services.

For UE1 and UE2, it can also perform:

2. UE1 carries the source ID and destination ID used for this connection establishment in the Sidelink RRC setup request message (the same as the current procedure), and UE2 sends the identification information of UE2 in the Sidelink RRC setup.

UE1 judges whether UE2 has established a connection before according to the Sidelink RRC setup sent by UE2.

If it has been established, UE2 is notified in the Sidelink RRC setup complete message that there is no need to establish an RRC connection; there is no need to interact with UE capabilities (AS layer configuration may need to be configured according to different QoS); use the previously established connection to transmit subsequent services.

The Sidelink RRC setup complete message includes the UE1 ID sent by UE1 in the Sidelink RRC setup request, the layer-2 ID used when UE2 and UE1 were previously connected, and the information element (Information Element, IE) that indicates the release of the RRC connection. One or more.

For UE1 and UE2, it can also perform:

Solution 3: Transmit by sending UE capabilities or requesting UE capabilities.

1. UE1 sends the identification information of UE1 by sending a message about the capabilities of UE1.

For UE2 side:

If it has been established, UE2 uses the ID of the UE2 that has established a connection with UE1 to reply to UE1 (or not to reply), or reply to the message that UE1 has established a connection. You can also perform the following operations:

1) Does not send UE2 capabilities to UE1;

2) Use the previously stored capabilities of UE1;

3) The capability of UE1 is not stored.

1), 2), and 3) are and/or relationships, and one or both of them can be executed.

For UE1 side:

If UE1 does not receive any message from UE2, it does not need to perform any operation;

If UE1 receives the UE2 ID sent by UE2 or the message that the connection has been established, it determines that UE2 is the UE that has established the connection according to the received UE2 ID or the message that the connection has been established.

1) Use the previously stored UE2 capabilities;

2) The capabilities of UE2 are not stored.

Let's take the direct connection system of NR as an example.

Embodiment 1: In this example, the identification information is transmitted when the connection is established through the PC5-S, and the UE1 sends the identification information of the UE1 through the Direct Communication Request message.

Figure 6 is a schematic diagram of the user identification process implementation process 1, as shown in the figure, which can include:

Step 601: UE1 sends the identification information of UE1 through Direct Communication Request message.

UE2 judges whether it has established a connection with UE1 before through the received identification information of UE1.

If it has been established, UE2 uses the UE2 ID that has previously established a connection with UE1 to reply in the Direct Communication Accept message.

Step 602: The UE2 replies through a Direct Communication Accept message, which contains the ID of the UE2 that has previously established a connection with the UE1, and informs the UE1 that the connection has been established.

You can also:

1) Notify the AS layer of UE2 that it does not need to establish an AS layer connection, nor does it need to interact with UE capabilities, and use the previously established connection to transmit subsequent services;

2) The communication connection of the NAS layer is not established, and the UE capability is not required to be exchanged, and subsequent services are transmitted using the previously established connection.

According to the Direct Communication Accept message sent by UE2, UE1 determines that UE2 is a UE that has established a connection before.

1) Notify the AS layer of UE1 that it does not need to establish an AS layer connection, nor does it need to interact with UE capabilities, and use the previously established connection to transmit subsequent services;

Step 603: If the V2X service data over unicast link (V2X unicast service data) has been established, the data is transmitted on the previous connection.

The subsequent service is transmitted using the previously established connection, that is, the current service can be transmitted on the communication connection established by UE1 and UE2 before, with the same destination ID.

If no connection is established,

For the above 1), an AS layer connection is established;

For the above 2), a communication connection at the NAS layer is established.

Embodiment 2: In this example, the identification information is transmitted when the connection is established through the PC5-S, and UE1 still sends the Direct Communication Request message according to the existing process to carry the UE1 identification used for the establishment of the connection, and UE2 sends UE2 in the Direct Communication Accept message The identification information.

Figure 7 is a schematic diagram of the user identification process implementation process 2, as shown in the figure, which may include:

Step 701: UE1 sends the UE1 identity used for this connection establishment through Direct Communication Request message.

Step 702: After receiving the Direct Communication Request message sent by the UE1, the UE2 sends the identification information of the UE2 in the Direct Communication Accept message.

According to the Direct Communication Accept message sent by UE2, UE1 judges whether it has established a connection with UE2 before through the received identification information of UE2.

If established, then:

Step 703: Optionally, UE1 may also notify UE2 that the connection has been established (depending on the AS layer connection establishment process. If UE1 initiates the AS layer connection establishment process, UE2 does not need to be notified), then:

1) Notify the AS layer of UE2 that it does not need to establish an RRC connection; nor does it need to interact with UE capabilities, because the AS layer configuration may need to be configured according to different QoS; use the established connection to transmit subsequent services;

Step 704: If the V2X service data over unicast link has been established, data is transmitted on the previous connection.

If the connection is not established:

For the above 1), an AS layer connection is established;

For the above 2), a communication connection at the NAS layer is established.

Embodiment 3: In this example, the identification information is transmitted during the establishment of the SL RRC connection, and the UE1 sends the identification information of the UE1 through the Sidelink RRC setup request.

Figure 8 is a schematic diagram of the user identification process implementation process 3, as shown in the figure, it can include:

Step 801: UE1 sends the identification information of UE1 through Sidelink RRC setup request.

If it has been established, UE2 uses the UE2 ID that has established a connection with UE1 before and replies in Sidelink RRC setup.

Step 802: UE2 responds via Sidelink RRC setup, which contains the ID of UE2 that has previously established a connection with UE1, and informs UE1 that a connection has been established.

You can also:

1) The AS layer of UE2 does not need to establish an AS layer connection, nor does it need to interact with UE capabilities, and uses the previously established connection to transmit subsequent services;

According to the Sidelink RRC setup sent by UE2, UE1 determines that UE2 is a UE that has established a connection before.

1) The AS layer of UE1 does not need to establish an AS layer connection, nor does it need to interact with UE capabilities, and uses the previously established connection to transmit subsequent services;

Step 803: If the V2X service data over unicast link has been established, data is transmitted on the previous connection.

If the connection is not established:

For the above 1), an AS layer connection is established;

For the above 2), a communication connection at the NAS layer is established.

Embodiment 4: In this example, the identification information is transmitted during the establishment of the SL RRC connection. The Sidelink RRC setup request message carries the source identification and the destination identification for this connection establishment (the same as the current process), and the UE2 is in Sidelink. The identification information of UE2 is sent in the RRC setup.

Figure 9 is a schematic diagram of the user identification process implementation process 4, as shown in the figure, which may include:

Step 901: The UE1 sends the source identifier and the destination identifier used for this connection establishment through the Sidelink RRC setup request, where the source identifier is the identifier of the UE1 used for this connection establishment.

Step 902: After receiving the Sidelink RRC setup request sent by UE1, UE2 sends the identification information of UE2 in Sidelink RRC setup. Of course, it can also send the identification information of UE2 in other messages.

According to the Sidelink RRC setup sent by UE2, UE1 determines whether it has established a connection with UE2 before using the received identification information of UE2.

If established, then:

1) The AS layer of UE1 does not need to establish an RRC connection; nor does it need to interact with UE capabilities. This is because the AS layer configuration may need to be configured according to different QoS; use the established connection to transmit subsequent services;

Step 903: Optionally, UE1 may also notify UE2 that the connection has been established (depending on the AS layer connection establishment process, if UE1 initiates the AS layer connection establishment process, UE2 does not need to be notified), then:

1) The AS layer of UE2 does not need to establish an RRC connection; nor does it need to interact with UE capabilities, because the AS layer configuration may need to be configured according to different QoS; use the established connection to transmit subsequent services;

For example, UE1 can notify UE2 that the connection has been established through a Sidelink RRC setup complete message, where the Sidelink RRC setup complete message includes the UE1 ID sent by UE1 in the Sidelink RRC setup request, and the layer used by UE2 and UE1 to establish a connection before. 2 ID, and one or more of the IEs indicating the release of the RRC connection.

Step 904: If the V2X service data over unicast link has been established, the data is transmitted on the previous connection.

If no connection is established;

For the above 1), an AS layer connection is established;

For the above 2), a communication connection at the NAS layer is established.

Embodiment 5: In this example, the identification information is transmitted in the UE capability transmission or UE capability request message. UE1 carries the UE1 identification information in the UE capability transmission or UE capability request message. Optionally, UE2 replies to UE2’s identification Information and/or UE2 capabilities.

Figure 10 is a schematic diagram of the user identification process implementation process 5, as shown in the figure, it can include:

Step 1001: UE1 sends the identification information of UE1 in a message for transmitting UE capabilities or requesting UE capabilities.

If it has been established, optionally, UE2 uses the ID of the UE2 that has previously established a connection with UE1 to reply to UE1 (or not to reply), or reply to the message that UE1 has established a connection.

Step 1002 is an optional step. UE2 replies to UE1, including the ID of the UE2 that has established a connection with UE1 before, and informs UE1 that the connection has been established.

You can also:

1) Does not send UE2 capabilities to UE1;

2) Use the previously stored capabilities of UE1;

3) The capability of UE1 is not stored.

UE1 judges that UE2 is a UE that has previously established a connection according to the UE2 ID sent by UE2 or the notification that it has established a connection with UE1.

1) Use the previously stored UE2 capabilities;

2) The capabilities of UE2 are not stored.

The embodiments of other schemes are similar to the embodiments 1 to 5, and the corresponding improvements can be made, which will not be repeated here.

Based on the same inventive concept, the embodiments of this application also provide terminal equipment, identification information sending devices, identification information receiving devices, and computer-readable storage media. Because of the principle of these devices to solve problems, identification information sending methods, and identification information receiving methods Similar, so the implementation of these devices can refer to the implementation of the method, and the repetition will not be repeated.

When implementing the technical solutions provided in the embodiments of the present application, they can be implemented as follows.

Figure 11 is a schematic diagram of the structure of the first terminal device. As shown in the figure, the user equipment includes:

The processor 1100 is configured to read a program in the memory 1120 and execute the following process:

The transceiver 1110 is configured to receive and send data under the control of the processor 1100.

The first terminal does not store the capabilities of the second terminal;

and / or

The first terminal does not store the capabilities of the second terminal.

In an optional implementation manner, the first terminal sends the identification information of the first terminal in the SL RRC connection establishment request message, if it receives a notification from the second terminal that the first terminal and the second terminal have established a connection , Or the identification information of the second terminal, further comprising one or a combination of the following steps:

Instruction information to terminate the RRC connection.

The ID of the first terminal sent by the first terminal in the SL RRC connection establishment message; or,

Instruction information to terminate the RRC connection.

Wherein, in FIG. 11, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1100 and various circuits of the memory represented by the memory 1120 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, no further descriptions are provided herein. The bus interface provides the interface. The transceiver 1110 may be a plurality of elements, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium. For different user equipment, the user interface 1130 may also be an interface capable of connecting externally and internally with the required equipment. The connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, etc.

The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 when performing operations.

Figure 12 is a schematic structural diagram of a second terminal device. As shown in the figure, the user equipment includes:

The processor 1200 is configured to read a program in the memory 1220 and execute the following process:

The transceiver 1210 is used to receive and send data under the control of the processor 1200.

The second terminal does not store the capabilities of the first terminal;

and / or

The second terminal does not store the capabilities of the first terminal.

Instruction information to terminate the RRC connection.

Wherein, in FIG. 12, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1200 and various circuits of the memory represented by the memory 1220 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, no further descriptions are provided herein. The bus interface provides the interface. The transceiver 1210 may be a plurality of elements, that is, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium. For different user equipment, the user interface 1230 may also be an interface capable of connecting externally and internally with the required equipment. The connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, etc.

The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 can store data used by the processor 1200 when performing operations.

As shown in FIG. 13, an embodiment of the present application also provides an identification information sending device, including:

The communication connection module 1301 is used for establishing a communication connection between the first terminal and the second terminal;

The sending module 1302 is configured to send the identification information of the first terminal to the second terminal on the first terminal, where the identification information is used by the second terminal to determine whether the first terminal has communicated with the second terminal. A communication connection is established.

In an optional implementation manner, the sending module 1302 is specifically configured to send the identification information of the first terminal in at least one of the following ways:

Sending the identification information of the first terminal to the second terminal is sending the identification information of the first terminal when sending the capability of the first terminal to the second terminal;

The identification information of the first terminal is sent to the second terminal when the capability of the second terminal is requested from the second terminal.

In an optional implementation manner, when sending the identification information of the first terminal when sending the capability of the first terminal to the second terminal, the sending module 1302 is further configured to: if the first terminal sent by the second terminal is received A notification that a terminal has established a connection with a second terminal, or the identification information of the second terminal, use the previously stored capabilities of the second terminal; or,

Does not store the capabilities of the second terminal; and/or

When sending the identification information of the first terminal when requesting the capability of the second terminal from the second terminal, the sending module 1302 is further configured to: if a connection is established between the first terminal and the second terminal that is received from the second terminal Does not send the capabilities of the first terminal to the second terminal when the notification of the second terminal or the identification information of the second terminal; or,

Use the previously stored capabilities of the second terminal; or,

The capabilities of the second terminal are not stored.

In an optional implementation manner, the first terminal identification information is sent in a connection establishment accept message, and the sending module 1302 is further configured to: after receiving the first terminal and the second terminal sent by the second terminal Not establish an SL RRC connection with the second terminal when the notification of the connection or the identification information of the second terminal; or,

Do not send the capabilities of the first terminal to the second terminal; or,

Do not establish a PC5-S connection with the second terminal.

In an optional implementation manner, the first terminal identification information is sent in the connection establishment request message, and the sending module 1302 is further configured to: after receiving the information sent by the second terminal that the first terminal and the second terminal have established a connection Not to establish an SL RRC connection with the second terminal when notified, or when the identification information of the second terminal is used; or,

Do not send the capabilities of the first terminal to the second terminal; or,

Do not establish a PC5-S connection with the second terminal.

In an optional implementation manner, when the identification information of the first terminal is sent when the SL RRC connection is established, the sending module 1302 is specifically configured to:

In an optional implementation manner, the first terminal identification information is sent in the SL RRC connection establishment request message, and the sending module 1302 is further configured to: after receiving the first terminal and the second terminal sent by the second terminal The notification that the connection has been established, or the identification information of the second terminal, said not establishing an SL RRC connection with the second terminal; or,

Do not send the capabilities of the first terminal to the second terminal; or,

Do not establish a PC5-S connection with the second terminal.

Instruction information to terminate the RRC connection.

In an optional implementation manner, the first terminal identification information is sent in the connection establishment message, and the sending module 1302 is further configured to: upon receiving a notification sent by the second terminal that the first terminal and the second terminal have established a connection , Or when the identification information of the second terminal, does not establish an SL RRC connection with the second terminal; or,

Do not send the capabilities of the first terminal to the second terminal; or,

Do not establish a PC5-S connection with the second terminal.

Instruction information to terminate the RRC connection.

In an optional implementation manner, the sending module 1302 is further configured to: when it is determined that the first terminal has established a communication connection with the second terminal, transmit to the second terminal in a MAC PDU Service information, where the service information includes service information and new service information transmitted in the communication connection established between the first terminal and the second terminal.

As shown in FIG. 14, an embodiment of the present application also provides an identification information receiving device, including:

The receiving module 1401 is configured to receive, on a second terminal, the identification information of the first terminal sent by the first terminal, where the identification information is used by the second terminal to determine whether the first terminal has communicated with the second terminal. The terminal establishes a communication connection;

The connection judgment module 1402 is configured to determine whether the second terminal has established a communication connection with the first terminal according to the identification information.

In an optional implementation manner, the receiving module 1401 is specifically configured to receive the identification information of the first terminal in at least one of the following ways:

In an optional implementation manner, when the first terminal sends the identification information of the first terminal when the capability of the first terminal is sent to the second terminal, the connection judgment module 1402 is further configured to: When the identification information determines that the first terminal has established a communication connection with the second terminal, the second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Use the previously stored capabilities of the first terminal; or,

Not storing the capabilities of the first terminal;

and / or

When the first terminal sends the identification information of the first terminal when requesting the second terminal's capabilities from the second terminal, the connection determination module 1402 is further configured to: if it is determined according to the identification information that the first terminal has When a communication connection is established with the second terminal, notify the first terminal that the second terminal has established a communication connection with the first terminal; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Use the previously stored capabilities of the first terminal; or,

The capabilities of the first terminal are not stored.

In an optional implementation manner, the connection judgment module 1402 is further configured to notify the first terminal when it is determined according to the identification information that the first terminal has established a communication connection with the second terminal The second terminal has established a communication connection with the first terminal; or,

Does not establish an SL RRC connection with the first terminal; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Do not establish a PC5-S connection with the first terminal.

In an optional implementation manner, the first terminal sends the identification information of the first terminal through an SL RRC connection establishment request message, and the connection determination module 1402 is further configured to: determine the identification information of the first terminal according to the identification information of the first terminal. When the first terminal has established a communication connection with the second terminal, notify the first terminal that the second terminal has established a communication connection with the first terminal; or,

Does not establish an SL RRC connection with the first terminal; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Instruction information to terminate the RRC connection.

In an optional implementation manner, the first terminal is sent through an SL RRC connection establishment message, and the connection judgment module 1402 is further configured to: determine, according to the identification information of the first terminal, the first terminal When the second terminal establishes a communication connection, notify the first terminal that the second terminal has established a communication connection with the first terminal; or,

Does not establish an SL RRC connection with the first terminal; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Instruction information to terminate the RRC connection.

For the convenience of description, each part of the above-mentioned device is divided into various modules or units by function and described separately. Of course, when implementing this application, the functions of each module or unit can be implemented in the same or multiple software or hardware.

An embodiment of the present application also provides a computer-readable storage medium that stores a computer program that executes the foregoing identification information sending or receiving method. For specific implementation, please refer to the implementation of identification information sending or receiving method, which will not be repeated here.

In summary, in the technical solution provided by the embodiments of the present application, the first terminal sends the identification information of the first terminal to the second terminal, and the identification information is used by the second terminal to determine whether the first terminal has established a connection with the second terminal. Communication connection.

In the technical solution provided by the embodiments of the present application, a solution for identifying users is provided, so that a unique unicast connection can be established between two UEs in a unicast connection, so that only one unicast connection needs to be maintained , Store a copy of UE context and save resources.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to the embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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 functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

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

Claims

A method for sending identification information, characterized in that it comprises:

Establishing a communication connection between the first terminal and the second terminal;

The first terminal sends the identification information of the first terminal to the second terminal, where the identification information is used by the second terminal to determine whether the first terminal has established a communication connection with the second terminal.
The method according to claim 1, wherein the identification information of the first terminal includes one or more of the following information:

The identifier being used by the first terminal, the combination of identifiers being used by the first terminal, and the unique identifier of the first terminal.
The method according to claim 2, wherein the identifier being used by the first terminal includes all identifiers used when the first terminal establishes a communication connection; or,

The combination of identifiers being used by the first terminal includes: a combination of all identifiers used when the first terminal establishes a communication connection, or identifiers generated by algorithms for all identifiers used when establishing a communication connection; or,

The unique identifier of the first terminal includes one or a combination of the following identifiers: a unique identifier of a network configuration, a pre-configured unique identifier, and a unique identifier assigned by the first terminal.
The method according to claim 1, wherein the first terminal sends the identification information of the first terminal to the second terminal by using at least one of the following methods to send the identification information of the first terminal:

When establishing a communication connection, the first terminal sends the identification information of the first terminal to the second terminal, and sends the identification information of the first terminal when establishing a direct communication interface PC5-S connection;

The first terminal sends the identification information of the first terminal to the second terminal when establishing a communication connection, and sends the identification information of the first terminal when establishing a through link radio resource control signaling SL RRC connection;

When the first terminal sends the identification information of the first terminal to the second terminal, the identification information of the first terminal is sent when the first terminal sends the capability of the first terminal to the second terminal;

When the first terminal sends the identification information of the first terminal to the second terminal, the identification information of the first terminal is sent when the first terminal requests the second terminal for the capability of the second terminal.
The method of claim 4, wherein:

When the first terminal sends the identification information of the first terminal when sending the capabilities of the first terminal to the second terminal, if the notification sent by the second terminal that the first terminal has established a connection with the second terminal is received, or The identification information of the second terminal further includes one or a combination of the following steps:

The first terminal uses the previously stored capabilities of the second terminal; or,

The first terminal does not store the capabilities of the second terminal;

and / or

When the first terminal sends the identification information of the first terminal when requesting the second terminal for the capabilities of the second terminal, if the notification sent by the second terminal that the first terminal and the second terminal have established a connection is received, or The identification information of the second terminal further includes one or a combination of the following steps:

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal uses the previously stored capabilities of the second terminal; or,

The first terminal does not store the capabilities of the second terminal.
The method of claim 4, wherein the identification information of the first terminal is sent when the PC5-S connection is established, and the first terminal sends the identification information of the first terminal in a connection establishment request message Or, the first terminal sends the identification information of the first terminal in a connection establishment accept message.
The method according to claim 6, wherein the first terminal sends the first terminal identification information in a connection establishment acceptance message, and the first terminal and the second terminal have established a connection after receiving the message sent by the second terminal. The notification, or the identification information of the second terminal, further includes one of the following steps or a combination thereof:

The first terminal does not establish an SL RRC connection with the second terminal; or,

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal transmits service information to the second terminal through a communication connection that has been established with the second terminal; or,

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal; or,

The first terminal does not establish a PC5-S connection with the second terminal.
The method according to claim 6, wherein the first terminal sends the first terminal identification information in the connection establishment request message, and upon receiving the notification sent by the second terminal that the first terminal and the second terminal have established a connection, Or the identification information of the second terminal, further comprising one or a combination of the following steps:

The first terminal does not establish an SL RRC connection with the second terminal; or,

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal transmits service information to the second terminal through a communication connection that has been established with the second terminal; or,

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal; or,

The first terminal does not establish a PC5-S connection with the second terminal.
The method according to claim 4, wherein the identification information of the first terminal is sent when the SL RRC connection is established, and the first terminal sends the identification information of the first terminal in an SL RRC connection establishment request message Or, the first terminal sends the identification information of the first terminal in the SL RRC connection establishment message.
The method according to claim 9, wherein the first terminal sends the first terminal identification information in the SL RRC connection establishment request message, and the first terminal and the second terminal have been established after receiving the message sent by the second terminal. When the notification of connection, or the identification information of the second terminal, further includes one of the following steps or a combination thereof:

The first terminal does not establish an SL RRC connection with the second terminal; or,

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal transmits service information to the second terminal through the communication connection that has been established with the second terminal; or,

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal; or,

The first terminal does not establish a PC5-S connection with the second terminal.
The method according to claim 10, wherein the SL RRC connection establishment message further includes one of the following contents or a combination thereof:

The identity of the first terminal sent by the first terminal in the SL RRC connection establishment request; or,

The identities of the first terminal and the second terminal used when the second terminal establishes a connection with the first terminal; or,

Instruction information to terminate the RRC connection.
The method according to claim 9, wherein the first terminal sends the first terminal identification information in the connection establishment message, and upon receiving the notification sent by the second terminal that the first terminal and the second terminal have established a connection, or The identification information of the second terminal further includes one or a combination of the following steps:

The first terminal does not establish an SL RRC connection with the second terminal; or,

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal transmits service information to the second terminal through a communication connection that has been established with the second terminal; or,

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal; or,

The first terminal does not establish a PC5-S connection with the second terminal.
The method according to claim 12, wherein the SL RRC connection establishment complete message includes one of the following contents or a combination thereof:

The identity of the first terminal sent by the first terminal in the SL RRC connection establishment message; or,

The identities of the first terminal and the second terminal used when the second terminal establishes a connection with the first terminal; or,

Instruction information to terminate the RRC connection.
The method according to any one of claims 4 to 13, wherein when determining that the first terminal has established a communication connection with the second terminal, the method further comprises:

The first terminal transmits service information to the second terminal in a media access control protocol data unit MAC PDU, and the service information is included in the communication connection that the first terminal has established with the second terminal Transmitted business information and new business information.
A method for receiving identification information, characterized in that it comprises:

The second terminal receives the identification information of the first terminal sent by the first terminal, where the identification information is used by the second terminal to determine whether the first terminal has established a communication connection with the second terminal;

The second terminal determines whether a communication connection with the first terminal has been established according to the identification information.
The method according to claim 15, wherein the identification information of the first terminal includes one or more of the following information:

The identifier being used by the first terminal, the combination of identifiers being used by the first terminal, and the unique identifier of the first terminal.
The method according to claim 16, wherein the identifier being used by the first terminal includes all identifiers used when the first terminal establishes a communication connection; or,

The combination of identifiers being used by the first terminal includes: a combination of all the identifiers used by the first terminal when establishing a communication connection, or an algorithm generated by a combination of all identifiers used when establishing a communication connection; or,

The unique identifier of the first terminal includes one or a combination of the following identifiers: a unique identifier of a network configuration, a pre-configured unique identifier, and a unique identifier assigned by the first terminal.
15. The method of claim 15, wherein the second terminal receives the identification information of the first terminal sent by the first terminal by using at least one of the following methods to receive the identification information of the first terminal:

The second terminal receives the identification information of the first terminal sent when the first terminal establishes a communication connection, which is the identification information of the first terminal sent when the first terminal establishes the direct communication interface PC5-S connection;

The second terminal receives the identification information of the first terminal sent when the first terminal establishes a communication connection, which is the identification information of the first terminal sent when the first terminal establishes a through link radio resource control signaling SL RRC connection ；

The second terminal receives the identification information of the first terminal sent by the first terminal, which is the identification information of the first terminal sent when the first terminal sends the capability of the first terminal to the second terminal;

The second terminal receives the identification information of the first terminal sent by the first terminal, which is the identification information of the first terminal sent when the first terminal requests the second terminal for the capability of the second terminal.
The method of claim 18, wherein:

When the first terminal sends the identification information of the first terminal when the capability of the first terminal is sent to the second terminal, if the second terminal determines according to the identification information that the first terminal has established a connection with the second terminal When a communication connection is established, it further includes one of the following steps or a combination:

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

The second terminal does not send the capabilities of the second terminal to the first terminal; or,

The second terminal uses the previously stored capabilities of the first terminal; or,

The second terminal does not store the capabilities of the first terminal;

and / or

When the identification information of the first terminal is sent when the first terminal requests the second terminal for the capabilities of the second terminal, if the second terminal determines according to the identification information that the first terminal has established a connection with the second terminal When the communication connection is established, it further includes one of the following steps or a combination:

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

The second terminal does not send the capabilities of the second terminal to the first terminal; or,

The second terminal uses the previously stored capabilities of the first terminal; or,

The second terminal does not store the capabilities of the first terminal.
The method of claim 18, wherein the identification information of the first terminal is sent when the PC5-S connection is established, and the first terminal sends the identification information of the first terminal in a connection establishment request message Or, the first terminal sends the identification information of the first terminal in a connection establishment accept message.
The method according to claim 20, wherein when the second terminal determines that the first terminal has established a communication connection with the second terminal according to the identification information, the method further comprises one of the following steps or a combination thereof :

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

The second terminal does not establish an SL RRC connection with the first terminal; or,

The second terminal does not send the capabilities of the second terminal to the first terminal; or,

The second terminal transmits service information to the first terminal through the communication connection established with the first terminal; or,

The second terminal uses the identifier of the second terminal to transmit service information to the first terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal; or,

The second terminal does not establish a PC5-S connection with the first terminal.
The method of claim 18, wherein when establishing an SL RRC connection and sending the identification information of the first terminal, the first terminal sends the identification information of the first terminal in an SL RRC connection establishment request message Or, the first terminal sends the identification information of the first terminal in the SL RRC connection establishment message.
The method according to claim 22, wherein the first terminal sends the identification information of the first terminal through an SL RRC connection establishment request message, and determines that the first terminal has When a communication connection is established with the second terminal, it further includes one or a combination of the following steps:

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

The second terminal does not establish an SL RRC connection with the first terminal; or,

The second terminal does not send the capabilities of the second terminal to the first terminal; or,

The second terminal transmits service information to the first terminal through the communication connection established with the first terminal; or,

The second terminal uses the identifier of the second terminal to transmit service information to the first terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal.
The method according to claim 23, wherein the SL RRC connection establishment message further includes one of the following contents or a combination thereof:

The identity of the first terminal sent by the first terminal in the SL RRC connection establishment request; or,

The identities of the first terminal and the second terminal used when the second terminal establishes a connection with the first terminal; or,

Instruction information to terminate the RRC connection.
The method according to claim 22, wherein the first terminal is sent through an SL RRC connection establishment message, and it is determined according to the identification information of the first terminal that the first terminal has established communication with the second terminal When connecting, further include one or a combination of the following steps:

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

The second terminal does not establish an SL RRC connection with the first terminal; or,

The second terminal does not send the capabilities of the second terminal to the first terminal; or,

The second terminal transmits service information to the first terminal through the communication connection established with the first terminal; or,

The second terminal uses the identifier of the second terminal to transmit service information to the first terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal.
The method according to claim 25, wherein the SL RRC connection establishment complete message includes one of the following contents or a combination thereof:

The identity of the first terminal sent by the first terminal in the SL RRC connection establishment message; or,

The identities of the first terminal and the second terminal used when the second terminal establishes a connection with the first terminal; or,

Instruction information to terminate the RRC connection.
The method according to any one of claims 18 to 26, wherein when it is determined that the first terminal has established a communication connection with the second terminal, the method further comprises:

The first terminal transmits service information to the second terminal in a media access control protocol data unit MAC PDU, and the service information is included in the communication connection that the first terminal has established with the second terminal Transmitted business information and new business information.
A first terminal device, characterized in that it comprises:

The processor is used to read the program in the memory and execute the following process:

When the first terminal establishes a communication connection with the second terminal, the identification information of the first terminal is sent to the second terminal, where the identification information is used by the second terminal to determine whether the first terminal has communicated with the first terminal. The two terminals establish a communication connection;

Transceiver, used to receive and send data under the control of the processor.
The device according to claim 28, wherein the identification information of the first terminal includes one or more of the following information:

The identifier being used by the first terminal, the combination of identifiers being used by the first terminal, and the unique identifier of the first terminal.
The device according to claim 29, wherein the identifier being used by the first terminal includes all identifiers used when the first terminal establishes a communication connection; or,

The combination of identifiers being used by the first terminal includes: a combination of all identifiers used when the first terminal establishes a communication connection, or identifiers generated by algorithms for all identifiers used when establishing a communication connection; or,

The unique identifier of the first terminal includes one or a combination of the following identifiers: a unique identifier of a network configuration, a pre-configured unique identifier, and a unique identifier assigned by the first terminal.
The device according to claim 28, wherein the first terminal sends the identification information of the first terminal to the second terminal by using at least one of the following methods to send the identification information of the first terminal:

When establishing a communication connection, the first terminal sends the identification information of the first terminal to the second terminal, and sends the identification information of the first terminal when establishing a direct communication interface PC5-S connection;

The first terminal sends the identification information of the first terminal to the second terminal when establishing a communication connection, and sends the identification information of the first terminal when establishing a through link radio resource control signaling SL RRC connection;

When the first terminal sends the identification information of the first terminal to the second terminal, the identification information of the first terminal is sent when the first terminal sends the capability of the first terminal to the second terminal;

When the first terminal sends the identification information of the first terminal to the second terminal, the identification information of the first terminal is sent when the first terminal requests the second terminal for the capability of the second terminal.
The device of claim 31, wherein:

When the first terminal sends the identification information of the first terminal when sending the capabilities of the first terminal to the second terminal, if the notification sent by the second terminal that the first terminal has established a connection with the second terminal is received, or The identification information of the second terminal further includes one or a combination of the following steps:

The first terminal uses the previously stored capabilities of the second terminal; or,

The first terminal does not store the capabilities of the second terminal;

and / or

When the first terminal sends the identification information of the first terminal when requesting the second terminal for the capabilities of the second terminal, if the notification sent by the second terminal that the first terminal has established a connection with the second terminal is received, or The identification information of the second terminal further includes one or a combination of the following steps:

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal uses the previously stored capabilities of the second terminal; or,

The first terminal does not store the capabilities of the second terminal.
The device according to claim 31, wherein the identification information of the first terminal is sent when the PC5-S connection is established, and the first terminal sends the identification information of the first terminal in a connection establishment request message Or, the first terminal sends the identification information of the first terminal in a connection establishment acceptance message.
The device according to claim 33, wherein the first terminal sends the first terminal identification information in a connection establishment acceptance message, and the first terminal and the second terminal have established a connection after receiving the message sent by the second terminal. The notification, or the identification information of the second terminal, further includes one or a combination of the following steps:

The first terminal does not establish an SL RRC connection with the second terminal; or,

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal transmits service information to the second terminal through a communication connection that has been established with the second terminal; or,

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal; or,

The first terminal does not establish a PC5-S connection with the second terminal.
The device according to claim 33, wherein the first terminal sends the first terminal identification information in the connection establishment request message, and upon receiving the notification sent by the second terminal that the first terminal and the second terminal have established a connection, Or the identification information of the second terminal, further comprising one of the following steps or a combination thereof:

The first terminal does not establish an SL RRC connection with the second terminal; or,

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal transmits service information to the second terminal through the communication connection that has been established with the second terminal; or,

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal; or,

The first terminal does not establish a PC5-S connection with the second terminal.
The device according to claim 31, wherein the identification information of the first terminal is sent when the SL RRC connection is established, and the first terminal sends the identification information of the first terminal in the SL RRC connection establishment request message Or, the first terminal sends the identification information of the first terminal in the SL RRC connection establishment message.
The device according to claim 36, wherein the first terminal sends the first terminal identification information in the SL RRC connection establishment request message, and the first terminal and the second terminal have been established after receiving the message sent by the second terminal. The notification of connection or the identification information of the second terminal further includes one of the following steps or a combination thereof:

The first terminal does not establish an SL RRC connection with the second terminal; or,

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal transmits service information to the second terminal through a communication connection that has been established with the second terminal; or,

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal.
The device according to claim 37, wherein the SL RRC connection establishment message further includes one of the following contents or a combination thereof:

The identity of the first terminal sent by the first terminal in the SL RRC connection establishment request; or,

The identities of the first terminal and the second terminal used when the second terminal establishes a connection with the first terminal; or,

Instruction information to terminate the RRC connection.
The device according to claim 36, wherein the first terminal sends the first terminal identification information in the connection establishment message, if a notification sent by the second terminal that the first terminal has established a connection with the second terminal is received, or The identification information of the second terminal further includes one or a combination of the following steps:

The first terminal does not establish an SL RRC connection with the second terminal; or,

The first terminal does not send the capabilities of the first terminal to the second terminal; or,

The first terminal transmits service information to the second terminal through a communication connection that has been established with the second terminal; or,

The first terminal uses the identifier of the second terminal to transmit service information to the second terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal.
The device according to claim 39, wherein the SL RRC connection establishment complete message includes one or a combination of the following:

The first terminal ID sent by the first terminal in the SL RRC connection establishment message; or,

The identities of the first terminal and the second terminal used when the second terminal establishes a connection with the first terminal; or,

Instruction information to terminate the RRC connection.
The device according to any one of claims 31 to 40, wherein when it is determined that the first terminal has established a communication connection with the second terminal, it further comprises:

The first terminal transmits service information to the second terminal in a media access control protocol data unit MAC PDU, and the service information is included in the communication connection that the first terminal has established with the second terminal Transmitted business information and new business information.
A second terminal device, characterized by comprising:

The processor is used to read the program in the memory and execute the following process:

After receiving the identification information of the first terminal sent by the first terminal, it is determined according to the identification information whether a communication connection with the first terminal has been established, and the identification information is used by the second terminal to determine the Whether the first terminal has established a communication connection with the second terminal;

Transceiver, used to receive and send data under the control of the processor.
The device according to claim 42, wherein the identification information of the first terminal includes one or more of the following information:

The identifier being used by the first terminal, the combination of identifiers being used by the first terminal, and the unique identifier of the first terminal.
The device according to claim 43, wherein the identifier being used by the first terminal includes all identifiers used when the first terminal establishes a communication connection; or,

The combination of identifiers being used by the first terminal includes: a combination of all the identifiers used by the first terminal when establishing a communication connection, or an algorithm generated by a combination of all identifiers used when establishing a communication connection; or,

The unique identifier of the first terminal includes one or a combination of the following identifiers: a unique identifier of a network configuration, a pre-configured unique identifier, and a unique identifier assigned by the first terminal.
The device according to claim 43, wherein the second terminal receives the identification information of the first terminal sent by the first terminal by using at least one of the following methods to receive the identification information of the first terminal:

The second terminal receives the identification information of the first terminal sent when the first terminal establishes a communication connection, which is the identification information of the first terminal sent when the first terminal establishes the direct communication interface PC5-S connection;

The second terminal receives the identification information of the first terminal sent when the first terminal establishes a communication connection, which is the identification information of the first terminal sent when the first terminal establishes a through link radio resource control signaling SL RRC connection ；

The second terminal receives the identification information of the first terminal sent by the first terminal, which is the identification information of the first terminal sent when the first terminal sends the capability of the first terminal to the second terminal;

The second terminal receives the identification information of the first terminal sent by the first terminal, which is the identification information of the first terminal sent when the first terminal requests the second terminal for the capability of the second terminal.
The device of claim 45, wherein:

When the first terminal sends the identification information of the first terminal when the capability of the first terminal is sent to the second terminal, if the second terminal determines according to the identification information that the first terminal has established a connection with the second terminal When a communication connection is established, it further includes one of the following steps or a combination:

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

The second terminal does not send the capabilities of the second terminal to the first terminal; or,

The second terminal uses the previously stored capabilities of the first terminal; or,

The second terminal does not store the capabilities of the first terminal;

and / or

When the first terminal sends the identification information of the first terminal when the second terminal requests the capabilities of the second terminal, if the second terminal determines according to the identification information that the first terminal has established a connection with the second terminal When a communication connection is established, it further includes one of the following steps or a combination:

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

The second terminal does not send the capabilities of the second terminal to the first terminal; or,

The second terminal uses the previously stored capabilities of the first terminal; or,

The second terminal does not store the capabilities of the first terminal.
The device of claim 45, wherein the identification information of the first terminal is sent when the PC5-S connection is established, and the first terminal sends the identification information of the first terminal in a connection establishment request message Or, the first terminal sends the identification information of the first terminal in a connection establishment accept message.
The device according to claim 47, wherein when the second terminal determines according to the identification information that the first terminal has established a communication connection with the second terminal, it further comprises one of the following steps or a combination thereof :

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

Notifying the second terminal not to establish an SL RRC connection with the first terminal; or,

Notifying the second terminal not to send the capabilities of the second terminal to the first terminal; or,

Notifying the second terminal to transmit service information to the first terminal through the communication connection that has been established with the first terminal; or,

The second terminal uses the identifier of the second terminal to transmit service information to the first terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal; or,

The second terminal does not establish a PC5-S connection with the first terminal.
The device according to claim 45, wherein when an SL RRC connection is established to send the identification information of the first terminal, the first terminal sends the identification information of the first terminal in an SL RRC connection establishment request message Or, the first terminal sends the identification information of the first terminal in the SL RRC connection establishment message.
The device according to claim 49, wherein the first terminal sends the identification information of the first terminal through an SL RRC connection establishment request message, and determines that the first terminal has already been established according to the identification information of the first terminal. When a communication connection is established with the second terminal, it further includes one or a combination of the following steps:

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

The second terminal does not establish an SL RRC connection with the first terminal; or,

The second terminal does not send the capabilities of the second terminal to the first terminal; or,

The second terminal transmits service information to the first terminal through the communication connection established with the first terminal; or,

The second terminal uses the identifier of the second terminal to transmit service information to the first terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal.
The device according to claim 50, wherein the SL RRC connection establishment message further includes one of the following contents or a combination thereof:

The identity of the first terminal sent by the first terminal in the SL RRC connection establishment request; or,

The identities of the first terminal and the second terminal used when the second terminal establishes a connection with the first terminal; or,

Instruction information to terminate the RRC connection.
The device according to claim 49, wherein the first terminal is sent through an SL RRC connection establishment message, and it is determined based on the identification information of the first terminal that the first terminal has established communication with the second terminal When connecting, further include one or a combination of the following steps:

The second terminal notifies the first terminal that the second terminal has established a communication connection with the first terminal; or,

The second terminal sends to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

The second terminal does not establish an SL RRC connection with the first terminal; or,

The second terminal does not send the capabilities of the second terminal to the first terminal; or,

The second terminal transmits service information to the first terminal through the communication connection established with the first terminal; or,

The second terminal uses the identifier of the second terminal to transmit service information to the first terminal, and the identifier of the second terminal is used in the communication connection that the first terminal has established with the second terminal The identity of the second terminal.
The device according to claim 52, wherein the SL RRC connection establishment complete message includes one or a combination of the following:

The first terminal ID sent by the first terminal in the SL RRC connection establishment message; or,

The identities of the first terminal and the second terminal used when the second terminal establishes a connection with the first terminal; or,

Instruction information to terminate the RRC connection.
The device according to any one of claims 45 to 53, wherein when it is determined that the first terminal has established a communication connection with the second terminal, it further comprises:

The first terminal transmits service information to the second terminal in a media access control protocol data unit MAC PDU, and the service information is included in the communication connection that the first terminal has established with the second terminal Transmitted business information and new business information.
An identification information sending device, characterized by comprising:

The communication connection module is used for establishing a communication connection between the first terminal and the second terminal;

A sending module, configured to send identification information of the first terminal to a second terminal on the first terminal, where the identification information is used by the second terminal to determine whether the first terminal has established a connection with the second terminal Communication connection.
The apparatus according to claim 55, wherein the sending module is specifically configured to send the identification information of the first terminal in at least one of the following ways:

When a communication connection is established, the identification information of the first terminal is sent to the second terminal, and the identification information of the first terminal is sent when the direct communication interface PC5-S connection is established;

When establishing a communication connection, sending the identification information of the first terminal to the second terminal is sending the identification information of the first terminal when establishing a through link radio resource control signaling SL RRC connection;

Sending the identification information of the first terminal to the second terminal is sending the identification information of the first terminal when sending the capability of the first terminal to the second terminal;

The identification information of the first terminal is sent to the second terminal when the capability of the second terminal is requested from the second terminal.
The apparatus according to claim 56, wherein when sending the identification information of the first terminal when sending the capability of the first terminal to the second terminal, the sending module is further configured to: if the second terminal is received When the sent notification that the first terminal and the second terminal have established a connection, or the identification information of the second terminal, use the previously stored capabilities of the second terminal; or,

Not storing the capabilities of the second terminal;

and / or

When sending the identification information of the first terminal when requesting the capabilities of the second terminal from the second terminal, if a notification that the first terminal has established a connection with the second terminal is received from the second terminal, or the second terminal When the identification information, it further includes one or a combination of the following steps:

Do not send the capabilities of the first terminal to the second terminal; or,

Use the previously stored capabilities of the second terminal; or,

The capabilities of the second terminal are not stored.
An identification information receiving device, characterized by comprising:

The receiving module is configured to receive the identification information of the first terminal sent by the first terminal on the second terminal, where the identification information is used by the second terminal to determine whether the first terminal has communicated with the second terminal Established a communication connection;

The connection judgment module is configured to determine whether the second terminal has established a communication connection with the first terminal according to the identification information.
The device according to claim 58, wherein the receiving module is specifically configured to receive the identification information of the first terminal in at least one of the following ways:

Receiving the identification information of the first terminal sent by the first terminal when the first terminal establishes a communication connection is the identification information of the first terminal sent when the first terminal establishes the direct communication interface PC5-S connection;

Receiving the identification information of the first terminal sent by the first terminal when establishing a communication connection is the identification information of the first terminal sent when the first terminal establishes a through link radio resource control signaling SL RRC connection;

Receiving the identification information of the first terminal sent by the first terminal is the identification information of the first terminal sent when the first terminal sends the capability of the first terminal to the second terminal;

The identification information of the first terminal that is received by the first terminal is the identification information of the first terminal that is sent when the first terminal requests the second terminal for the capability of the second terminal.
The device according to claim 59, wherein when the first terminal sends the identification information of the first terminal when the capability of the first terminal is sent to the second terminal, the connection judgment module is further configured to: When it is determined according to the identification information that the first terminal has established a communication connection with the second terminal, notify the first terminal that the second terminal has established a communication connection with the first terminal; or,

Sending to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Use the previously stored capabilities of the first terminal; or,

Not storing the capabilities of the first terminal;

and / or

When the identification information of the first terminal is sent when the first terminal requests the second terminal for the capabilities of the second terminal, if it is determined according to the identification information that the first terminal has established a communication connection with the second terminal , It further includes one or a combination of the following steps:

Notifying the first terminal that the second terminal has established a communication connection with the first terminal; or,

Sending to the first terminal the second terminal identifier when the communication connection with the first terminal has been established; or,

Do not send the capabilities of the second terminal to the first terminal; or,

Use the previously stored capabilities of the first terminal; or,

The capabilities of the first terminal are not stored.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the method of any one of claims 1-27.