CN111867146B

CN111867146B - Identification information sending and receiving method, equipment and device

Info

Publication number: CN111867146B
Application number: CN201910750450.5A
Authority: CN
Inventors: 王达; 梁靖; 赵亚利
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-04-30
Filing date: 2019-08-14
Publication date: 2022-07-22
Anticipated expiration: 2039-08-14
Also published as: CN111867146A; WO2020220843A1

Abstract

The invention discloses a method, a device and a device for sending and receiving identification information, which comprises the following steps: the first terminal establishes communication connection with the second terminal; the method comprises the steps that a first terminal sends identification information of the first terminal to a second terminal, and the identification information is used for the second terminal to determine whether the first terminal and the second terminal establish communication connection. A second terminal receives identification information of a first terminal sent by the first terminal; and the second terminal determines whether the communication connection with the first terminal is established or not according to the identification information. By adopting the invention, the terminal only needs to maintain one unicast connection and store one user equipment context, thereby saving resources.

Description

Identification information sending and receiving method, equipment and device

The present application claims priority of chinese patent application with application number 201910365381.6, entitled "identification information sending and receiving method, device and apparatus", filed in 30.04/2019, which is incorporated herein by reference in its entirety.

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method, a device, and an apparatus for sending and receiving identification information.

Background

The direct communication in the LTE (Long Term Evolution) system means that direct communication between devices is allowed between the devices. Fig. 1 is a schematic view of V2X (Vehicle to Everything) communication, as shown in the figure, for convenience of description, a direct communication link between a device and a device is defined as an SL (Sidelink) link, and a corresponding wireless interface is referred to as a direct communication interface (also referred to as a Sidelink interface); the cellular communication link between the network and the direct communication device is called a uulink, and its corresponding interface is called a Uu interface.

The devices that are in direct communication may all be on-line or off-line, or some devices may be on-line and some devices off-line. The device participating in direct communication, namely the on-line device, is positioned in the coverage of the communication carrier of the 3GPP base station, and the device participating in direct communication, namely the off-line device, is not positioned in the coverage of the communication carrier of the 3GPP base station.

In NR (Next generation Radio), 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 defects of the prior art are as follows: there is a waste of resources when multiple unicast connections need to be maintained and managed between two UEs.

Disclosure of Invention

The invention provides a method, equipment and a device for sending and receiving identification information, which are used for reducing resource waste when a plurality of unicast connections need to be maintained and managed between two pieces of UE.

The embodiment of the invention provides a method for sending identification information, which comprises the following steps:

the method comprises the steps that a first terminal and a second terminal are in communication connection;

the method comprises the steps that a first terminal sends identification information of the first terminal to a second terminal, and the identification information is used for the second terminal to determine whether the first terminal and the second terminal establish communication connection.

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

an identity being used by the first terminal, a combination of identities being used by the first terminal, a unique identity of the first terminal.

In implementation, the identifiers used by the first terminal include all identifiers used by the first terminal when establishing the communication connection; or the like, or a combination thereof,

the identification combination being used by the first terminal comprises: the first terminal establishes a combination of all identifiers used when the communication connection is established, or establishes identifiers generated by all identifiers used when the communication connection is established through an algorithm; or the like, or a combination thereof,

the unique identifier of the first terminal comprises one or a combination of the following identifiers: the first terminal is used for receiving the unique identifier of the network configuration, the unique identifier of the pre-configuration and the unique identifier distributed by the first terminal.

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 modes:

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

when a first terminal establishes communication connection, the first terminal sends identification information of the first terminal to a second terminal, and the identification information of the first terminal is sent when a direct link radio resource control (SL) RRC connection is established;

the method comprises the steps that a first terminal sends identification information of the first terminal to a second terminal, and the identification information of the first terminal is sent when the first terminal sends the capacity of the first terminal to the second terminal;

the method comprises the steps that a first terminal sends identification information of the first terminal to a second terminal, and 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 implementation, when the first terminal sends the identification information of the first terminal to the second terminal when sending the capability of the first terminal to the second terminal, if a notification that the first terminal and the second terminal have established a connection, or the identification information of the second terminal, sent by the second terminal is received, the method further includes one or a combination of the following steps:

the first terminal using previously stored capabilities of the second terminal; or the like, or, alternatively,

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

and/or

When a first terminal requests a second terminal for the capability of the second terminal and sends identification information of the first terminal, if a notification that the first terminal and the second terminal have established connection or the identification information of the second terminal sent by the second terminal is received, the method further comprises 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 like, or a combination thereof,

the first terminal using previously stored capabilities of the second terminal; or the like, or a combination thereof,

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

In implementation, when establishing the direct communication interface PC5-S connection, the identification information of the first terminal is sent, 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.

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

the first terminal does not establish SL RRC connection with the second terminal; or the like, or a combination thereof,

the first terminal does not send the capability of the first terminal to the second terminal; or the like, or a combination thereof,

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

the first terminal transmits service information to the second terminal by using the identifier of the second terminal, wherein the identifier of the second terminal is the identifier of the second terminal used in the communication connection established between the first terminal and the second terminal; or the like, or a combination thereof,

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

In implementation, the first terminal sends the first terminal identification information in the connection establishment request message, and when receiving a notification that the connection between the first terminal and the second terminal has been established, or the identification information of the second terminal, sent by the second terminal, the method further includes one or a combination of the following steps:

the first terminal transmits service information to the second terminal by using the identifier of the second terminal, wherein the identifier of the second terminal is the identifier of the second terminal used in the communication connection established between the first terminal and the second terminal; or the like, or, alternatively,

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

In implementation, the first terminal sends the first terminal identification information in a SL RRC connection establishment request message, and if a notification that the first terminal and the second terminal have established a connection, or the identification information of the second terminal, sent by the second terminal is received, the method further includes one or a combination of the following steps:

the first terminal does not establish SL RRC connection with the second terminal; or the like, or, alternatively,

the first terminal transmits service information to the second terminal through the communication connection established with the second terminal; or the like, or a combination thereof,

In an implementation, the SL RRC connection setup message further includes one or a combination of the following:

the identification of the first terminal is sent by the first terminal in the SL RRC connection establishment request; or the like, or, alternatively,

the identifier of the first terminal and the identifier of the second terminal are used when the second terminal and the first terminal establish connection; or the like, or a combination thereof,

indication information for terminating the RRC connection.

In implementation, the first terminal sends the first terminal identification information in the connection establishment message, and if a notification that the connection between the first terminal and the second terminal has been established, or the identification information of the second terminal, which is sent by the second terminal, is received, the method further includes one or a combination of the following steps:

the first terminal does not send the capability of the first terminal to the second terminal; or the like, or, alternatively,

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

the first terminal identifier is sent by the first terminal in the SL RRC connection establishment message; or the like, or, alternatively,

indication information for terminating the RRC connection.

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

and the first terminal transmits service information to the second terminal in one MAC PDU, wherein the service information comprises the service information transmitted in the communication connection which is established between the first terminal and the second terminal and new service information.

The embodiment of the invention provides a method for receiving identification information, which comprises the following steps:

a second terminal receives identification information of a first terminal, which is sent by the first terminal, wherein the identification information is used for the second terminal to determine whether the first terminal establishes a communication connection with the second terminal;

and the second terminal determines whether the communication connection with the first terminal is established or not according to the identification information.

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

the identification combination being used by the first terminal comprises: the method comprises the steps that a first terminal establishes all identification combinations used in communication connection or all identification combinations used in communication connection and identification generated through an algorithm; or the like, or, alternatively,

the unique identifier of the first terminal comprises one or a combination of the following identifiers: the first terminal is used for receiving the network configuration unique identifier, the pre-configured unique identifier and the unique identifier distributed by the first terminal.

In implementation, the second terminal receives the identification information of the first terminal sent by the first terminal, and the identification information of the first terminal is received by using at least one of the following modes:

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

the method comprises the steps that a second terminal receives identification information of a first terminal sent by the first terminal, wherein the identification information of the first terminal is sent by the first terminal when the first terminal establishes a direct link radio resource control (SL) RRC connection;

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

In implementation, when the first terminal sends the identification information of the first terminal to the second terminal when the first terminal sends the capability of the first terminal to the second terminal, and if 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 includes one or a combination of the following steps:

the second terminal informs the first terminal that the second terminal establishes communication connection with the first terminal; or the like, or, alternatively,

the second terminal sends a second terminal identification to the first terminal when the communication connection with the first terminal is established; or the like, or, alternatively,

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

the second terminal using the previously stored capabilities of the first terminal; or the like, or, alternatively,

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

and/or

When the first terminal requests the second terminal for the identification information of the first terminal when the first terminal requests the second terminal for the capability of the second terminal, if 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 or a combination of the following steps:

the second terminal sends a second terminal identification to the first terminal when the communication connection with the first terminal is established; or the like, or a combination thereof,

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

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, the method further includes one or a combination of the following steps:

the second terminal informs the first terminal that the second terminal has established communication connection with the first terminal; or the like, or, alternatively,

informing a second terminal not to establish SL RRC connection with the first terminal; or the like, or a combination thereof,

notifying a second terminal not to send the capability of the second terminal to the first terminal; or the like, or, alternatively,

informing a second terminal to transmit service information to the first terminal through the communication connection established with the first terminal; or the like, or, alternatively,

the second terminal transmits service information to the first terminal by using the identifier of the second terminal, wherein the identifier of the second terminal is the identifier of the second terminal used in the communication connection established between the first terminal and the second terminal; or the like, or, alternatively,

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

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

In an implementation, the first terminal sends the identification information of the first terminal through a SL RRC connection setup request message, and when it is determined that the first terminal has established a communication connection with the second terminal according to the identification information of the first terminal, the method further includes one or a combination of the following steps:

the second terminal does not establish SL RRC connection with the first terminal; or the like, or, alternatively,

the second terminal does not send the capability of the second terminal to the first terminal; or the like, or, alternatively,

the second terminal transmits service information to the first terminal through the communication connection established with the first terminal; or the like, or a combination thereof,

and the second terminal transmits service information to the first terminal by using the identifier of the second terminal, wherein the identifier of the second terminal is the identifier of the second terminal used in the communication connection established between the first terminal and the second terminal.

the identification of the first terminal is sent by the first terminal in the SL RRC connection establishment request; or the like, or a combination thereof,

the identifier of the first terminal and the identifier of the second terminal are used when the second terminal and the first terminal establish connection; or the like, or, alternatively,

indication information for terminating the RRC connection.

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

the second terminal informs the first terminal that the second terminal has established communication connection with the first terminal; or the like, or a combination thereof,

the second terminal does not establish SL RRC connection with the first terminal; or the like, or a combination thereof,

the second terminal does not send the capabilities of the second terminal to the first terminal; or the like, or a combination thereof,

a first terminal ID sent by the first terminal in the SL RRC connection setup message; or the like, or a combination thereof,

indication information for terminating the RRC connection.

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

a processor for reading the program in the memory, performing the following processes:

when a first terminal establishes communication connection with a second terminal, sending identification information of the first terminal to the second terminal, wherein the identification information is used for the second terminal to determine whether the first terminal establishes communication connection with the second terminal;

a transceiver for receiving and transmitting data under the control of the processor.

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

the identification combination being used by the first terminal comprises: the first terminal establishes a combination of all identifiers used when the communication connection is established, or establishes identifiers generated by all identifiers used when the communication connection is established through an algorithm; or the like, or, alternatively,

the unique identifier of the first terminal comprises one or a combination of the following identifiers: the unique identifier of the network configuration, the unique identifier of the pre-configuration and the unique identifier distributed by the first terminal.

when a first terminal establishes communication connection, sending identification information of the first terminal to a second terminal, wherein the identification information of the first terminal is sent when a direct link radio resource control (SL) RRC connection is established;

the method comprises the steps that a first terminal sends identification information of the first terminal to a second terminal, and the identification information of the first terminal is sent when the first terminal sends the capability of the first terminal to the second terminal;

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

and/or

When a first terminal sends identification information of a first terminal when requesting the capability of a second terminal from the second terminal, if a notification that the first terminal and the second terminal have established connection, or the identification information of the second terminal, sent by the second terminal, is received, the method further comprises 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 like, or, alternatively,

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

In implementation, the first terminal sends the first terminal identification information in the connection establishment acceptance message, and if a notification that the connection between the first terminal and the second terminal is established, or the identification information of the second terminal, sent by the second terminal, is received, the method further includes one or a combination of the following steps:

and the first terminal transmits service information to the second terminal by using the identifier of the second terminal, wherein the identifier of the second terminal is the identifier of the second terminal used in the communication connection established between the first terminal and the second terminal.

indication information for terminating the RRC connection.

In implementation, the first terminal sends the first terminal identification information in the connection establishment message, and if a notification that the first terminal and the second terminal have established a connection, or the identification information of the second terminal, sent by the second terminal, is received, the method further includes one or a combination of the following steps:

a first terminal ID sent by the first terminal in the SL RRC connection establishment message; or the like, or a combination thereof,

indication information for terminating the RRC connection.

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

after receiving identification information of a first terminal sent by the first terminal, determining whether a communication connection has been established with the first terminal according to the identification information, wherein the identification information is used for the second terminal to determine whether the communication connection has been established between the first terminal and the second terminal;

In implementation, the identifiers used by the first terminal include all identifiers used when the first terminal establishes the communication connection; or the like, or a combination thereof,

the identification combination being used by the first terminal comprises: the method comprises the steps that a first terminal establishes a combination of all identifiers used in communication connection, or establishes an identifier generated by an algorithm of the combination of all identifiers used in communication connection; or the like, or, alternatively,

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 by adopting at least one of the following modes:

the second terminal receives the identification information of the first terminal sent by the first terminal, wherein the identification information of the first terminal is sent by the first terminal when the direct communication interface PC5-S connection is established;

the second terminal informs the first terminal that the second terminal establishes communication connection with the first terminal; or the like, or a combination thereof,

the second terminal using previously stored capabilities of the first terminal; or the like, or a combination thereof,

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

and/or

When the first terminal requests the second terminal for the identification information of the first terminal, which is sent when the first terminal requests the second terminal for the capability of the second terminal, and if 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 or a combination of the following steps:

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

the second terminal does not establish a SL RRC connection with the first terminal; or the like, or, alternatively,

indication information for terminating the RRC connection.

the identification information of the first terminal is sent by the first terminal in the SL RRC connection establishment message; or the like, or a combination thereof,

indication information for terminating the RRC connection.

The embodiment of the invention provides an identification information sending device, which comprises:

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

a sending module, configured to send, on a first terminal, identification information of the first terminal to a 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.

An embodiment of the present invention provides an identification information receiving apparatus, including:

the terminal comprises a receiving module, a sending module and a receiving module, wherein the receiving module is used for receiving identification information of a first terminal, which is sent by the first terminal, on a second terminal, and the identification information is used for the second terminal to determine whether the first terminal establishes communication connection with the second terminal;

and the connection judging module is used for determining whether the second terminal establishes communication connection with the first terminal according to the identification information.

An embodiment of the present invention provides a computer-readable storage medium, which stores a computer program for executing the above-described identification information transmission or reception method.

The invention has the following beneficial effects:

in the technical scheme provided by the embodiment of the invention, because the two terminals can provide the identification information of the two terminals when establishing the connection, the opposite terminal can determine whether the connection is established or not, so that the only communication connection can be established between the two UEs in the communication connection, further, only one communication connection needs to be maintained, one UE context is stored, the complexity of the UE is reduced, and the resource is saved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not limit the invention. In the drawings:

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

fig. 2 is a schematic diagram of a unicast connection establishment process of the NAS layer in the embodiment of the present invention;

FIG. 3 is a diagram illustrating a unicast connection establishment procedure of an AS layer according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating an implementation flow of a method for sending identification information on a first terminal according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating an implementation flow of a method for receiving identification information at a second terminal according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a flow 1 for implementing a user identification process according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a process flow 2 for identifying a user according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a process flow 3 for identifying a user according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a process flow 4 for identifying a user according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a process flow 5 for identifying a user according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a first terminal device in the embodiment of the present invention;

fig. 12 is a schematic structural diagram of a second terminal device in the embodiment of the present invention.

Detailed Description

The inventor notices in the process of invention that:

communication connection establishment procedures: the method comprises a communication connection establishment process of an NAS (Non Access Stratum) layer, namely a direct communication interface PC5 signaling (PC5 signaling, PC5-S) connection establishment process, and a communication connection establishment process of an AS (Access Stratum) layer, namely a direct link radio Resource Control signaling (SL RRC) connection establishment process. As follows, the present application takes a unicast scenario of a direct link as an example, and respectively describes the two connection establishment procedures. It should be noted that, for other scenarios of the direct link, for example, a multicast scenario, there is a similar connection establishment process, which is not described herein again; in addition, the two connection establishment processes are not in sequence, and may be established simultaneously, or established separately and independently, or only one communication connection may be established, for example, only the communication connection of the NAS (Non Access Stratum) layer or only the communication connection of the AS (Access Stratum) layer is established, which is not limited in the present application.

Fig. 2 is a schematic diagram of a unicast connection establishment procedure of the NAS layer, where the unicast connection establishment procedure of the NAS layer mainly includes PC5-S signaling (i.e., step 203 and step 204 in the figure), and as shown in the figure, the following details are as follows:

step 201, the UE (User Equipment) determines a destination ID (Identity) for receiving the V2X unicast connection establishment signaling, where the destination ID is related to the V2X service.

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

Step 203, the UE1 sends the V2X unicast connection establishment procedure in a broadcast manner, wherein the directcommumcation Request (direct communication Request) information includes:

A) V2X service related information;

B) the destination ID is related to the V2X service initiating the connection establishment;

C) source ID, ID of UE1, UE1 self-assigned according to V2X service that needs to be performed;

i. to prevent tracking, the UE needs to autonomously change the source Layer-2ID (source Layer 2 identity) and is randomly changed, one UE may have multiple source Layer-2 IDs;

if the source ID changes, the UE needs to inform the correspondent UE with which a connection has been established.

Step 204, if the receiving UE is judged to be interested in establishing the service connection initiated by the UE1 according to the destination ID, replying UE1Direct Communication Accept information, wherein the information includes the ID of the receiving UE, for example, the ID of the UE2 in fig. 2, and the UE2 allocates the V2X service itself according to the need.

In step 205, the UE mainly interacts IDs of both parties through the connection established before, and performs subsequent unicast service transmission. The transmission of unicast traffic requires the use of both IDs to specify to which UE the message is sent.

Fig. 3 is a schematic diagram of a unicast connection establishment process of the AS layer, and AS shown in the figure, a possible unicast connection establishment process of the AS layer is AS follows:

based on the IDs of UE1 and UE2, UE1 sends a sidelinkrrcetup request (direct link RRC connection establishment request; RRC: Radio Resource Control, Radio Resource Control), UE2 replies sidelinkrrcetup (direct link RRC connection establishment), and UE1 confirms sidelinkrrcetup complete (direct link RRC connection establishment).

As mentioned above, the UE ID is randomly allocated 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 procedure is followed, one UE may also establish multiple unicast connections with another UE based on different services, that is, multiple NAS layer unicast connections or AS layer unicast connections. That is, for a UE, it does not know that multiple unicast connections are established with another UE, because the IDs of the peer UEs are different, the UE can only think that different unicast connections are established with multiple UEs, but actually multiple different unicast connections are established with the same UE.

Thus, multiple unicast connections, such as multiple PC5-S connections or multiple RRC connections, multiple SRBs 1 (signaling Radio Bearer 1), multiple DRBs (Data Radio Bearer), etc., need to be maintained and managed between two UEs, and multiple identical UE contexts (e.g., peer UE capabilities) are stored, which results in resource waste.

In summary, in the conventional LTE system, the service of the direct communication interface only supports the broadcast service, and for NR (New Radio, New air interface), the service of the direct communication interface is richer than that of LTE, and besides the broadcast service, the service also supports the unicast and multicast services. For unicast traffic, 2 UEs are required to establish a unicast connection to transmit unicast traffic, including control information and data information. The unicast connection between 2 UEs needs to be established according to the UE ID, and at present, the UE ID is randomly allocated by the UE itself according to different service requirements and needs to be updated at intervals. Therefore, the same UE may have a plurality of different UE IDs based on different services, one UE may also establish a plurality of unicast connections with another UE based on different services, and the UEs also need to maintain and manage the plurality of unicast connections, store a plurality of UE contexts (for example, peer UE capabilities), and waste resources.

Based on this, the embodiment of the present invention provides a scheme for identifying a user, which can uniquely identify the user, so that in a V2X unicast service, only one unicast connection needs to be established even if different V2X services are performed between 2 UEs, and thus only one unicast connection needs to be maintained and managed, one UE context is stored, and resource overhead is saved.

The following describes embodiments of the present invention with reference to the drawings.

In the description process, the implementation of the first terminal and the second terminal will be described separately, and then an example of the implementation of the first terminal and the second terminal will be given to better understand the implementation of the scheme given in the embodiment of the present invention. Such an explanation does not mean that the two terminals must be implemented in cooperation or separately, and actually, when the first terminal and the second terminal are implemented separately, the problems on the first terminal side and the second terminal side can be solved separately, and when the two terminals are used in combination, a better technical effect can be obtained.

In the description, the UE1 will be exemplified as the first terminal and the UE2 will be exemplified as the second terminal.

First, the implementation on the first terminal is described, then the implementation on the second terminal is described, how the two are combined is described by taking UE1 and UE2 as examples, and finally, the direct connection system of NR is described as an example.

It should be noted that the first terminal is not completely equal to UE1, the second terminal is not completely equal to UE1, and when described as the first terminal and the second terminal, the first terminal is always the terminal that sends the identifier of the first terminal, and the second terminal is always the terminal that receives the identifier; to better understand the transmission and reception and the interaction with each other on a terminal, when described as UE1 and UE2, UE1 or UE2 may have both the actions of transmitting the self identity and receiving the identity of the other party, which is easy to understand.

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

step 401, a first terminal and a second terminal establish communication connection;

step 402, a first terminal sends identification information of the first terminal to a second terminal, wherein the identification information is used for the second terminal to determine whether the first terminal has established communication connection with the second terminal.

In the following embodiments, the unicast is mainly used as an example for explanation, but obviously, the scheme is not limited to the unicast scenario, and the scheme can be used in other scenarios after appropriate improvements are made by those skilled in the art.

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

the identification combination being used by the first terminal comprises: the method comprises the steps that a first terminal establishes a combination of all identifiers used in communication connection, or establishes an identifier generated by an algorithm of the combination of all identifiers used in communication connection; or the like, or a combination thereof,

the unique identifier of the first terminal comprises one or a combination of the following identifiers: the unique identifier of the network configuration, the unique identifier of the pre-configuration and the unique identifier of the first terminal distribution.

In the case where the identifier being used by the first terminal includes all identifiers being used by the first terminal when establishing the communication connection, that is, the ID used by the first terminal when establishing the connection with another terminal before, the ID may not be used when establishing the connection with the second terminal, and the ID does not need to be transmitted again. For example, the IDs used by the UE1 before include ID1, ID2, ID3, and the ID4 will be used when the UE1 establishes connection with the UE2, but when the UE1 establishes connection with the UE2, the ID1 is no longer used (possibly, the ID1 has been updated, or the connection established using ID1 is released, etc.), then the UE1 only needs to send the ID2, ID3, and ID4 to the UE2, that is, the IDs 2, ID3, ID4 are the IDs being used when the first terminal establishes connection with the second terminal. In other words, those skilled in the art will readily appreciate that the ID is essentially the ID that helps the second terminal to determine whether a connection has been established.

The preconfigured unique identifier may include: pre-defined by a protocol, pre-configured by a device vendor, pre-assigned by an operator, pre-assigned by a standards organization, etc.

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:

the first terminal sends the identification information of the first terminal to the second terminal when the first terminal requests the capability of the second terminal from the second terminal.

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 a specific implementation, the identification information of the first terminal is sent when the connection is established and sent through the PC5-S, and the first terminal is sent in a connection establishment Request message, for example, sent through a Direct Communication Request message; or, the Direct Communication Request message in the SA2 flow is sent, and may also be sent in other messages, which is not limited in the present invention;

the first terminal is sent in the connection establishment acceptance message, for example, after receiving the Direct Communication Request message, the first terminal is sent in the Direct Communication Accept message; or, after receiving the Direct Communication Request message in the SA2 flow, the message is sent in the Direct Communication Accept message, or may be sent in other messages, which is not limited in the present invention;

the first terminal sends the capability of the first terminal to the second terminal, for example, in an RRC message for sending the capability, or in other messages, which is not limited in the present invention;

the first terminal is sent in a message requesting the second terminal for the capability of the second terminal, for example, in an RRC message requesting the capability of the second terminal, but may also be sent in other messages, and the present invention is not limited thereto.

In implementation, when establishing the direct communication interface PC5-S connection, the identification information of the first terminal is sent, 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 the connection establishment acceptance message.

In implementation, the first terminal sends the first terminal identification information in a connection establishment acceptance message, and if a notification that the connection between the first terminal and the second terminal has been established, or the identification information of the second terminal, which is sent by the second terminal, is received, the method further includes one or a combination of the following steps:

the first terminal does not establish a SL RRC connection with the second terminal, specifically, the connection is a connection of an AS layer and/or an NAS layer; or the like, or, alternatively,

the first terminal does not send the capability of the first terminal to the second terminal, specifically, the capability of the first terminal is not sent in an AS layer and/or an NAS layer; or the like, or, alternatively,

the first terminal transmits the service information to the second terminal through the communication connection established with the second terminal, specifically, when transmitting the service information, the identifiers of the first terminal and the second terminal used by the first terminal and the second terminal in the communication connection established between the first terminal and the second terminal, or the identifiers of the communication connection established between the first terminal and the second terminal; or the like, or, alternatively,

the first terminal transmits service information to the second terminal by using an identifier of the second terminal, where the identifier of the second terminal is an identifier of the second terminal used in a communication connection that has been established between the first terminal and the second terminal, and specifically, when transmitting the service information, the identifiers of the first terminal and the second terminal used may be identifiers of the first terminal and the second terminal used by the first terminal and the second terminal in a communication connection that has been established between the first terminal and the second terminal; or the like, or a combination thereof,

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

the first terminal does not establish a SL RRC connection with the second terminal, specifically, the connection is a connection of an AS layer and/or an NAS layer; or the like, or a combination thereof,

the first terminal does not send the capability of the first terminal to the second terminal, specifically, the capability of the first terminal is not sent in an AS layer and/or an NAS layer; or the like, or a combination thereof,

the first terminal transmits the service information to the second terminal through the communication connection established with the second terminal, and the specific service information transmission mode is as described above and is not described herein any more; or the like, or a combination thereof,

the first terminal transmits service information to the second terminal by using the identifier of the second terminal, where the identifier of the second terminal is the identifier of the second terminal used in the communication connection established between the first terminal and the second terminal, and the specific service information transmission manner is as described above and is not described herein again; or the like, or, alternatively,

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

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

the first terminal transmits service information to the second terminal by using the identifier of the second terminal, where the identifier of the second terminal is an identifier of the second terminal used in a communication connection established between the first terminal and the second terminal, and a specific service information transmission manner is as described above, and is not described herein again.

indication information for terminating the RRC connection.

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

the first terminal transmits service information to the second terminal through the communication connection established with the second terminal, and the specific service information transmission mode is as described above and is not described herein again; or the like, or, alternatively,

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

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

a first terminal ID sent by the first terminal in the SL RRC connection setup message; or the like, or, alternatively,

indication information for terminating the RRC connection.

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

and the first terminal transmits service information to the second terminal in one MAC PDU, wherein the service information comprises the service information transmitted in the communication connection which is established between the first terminal and the second terminal and new service information. The new service information may be understood as the service information to be transmitted when the first terminal establishes the communication connection with the second terminal.

Specifically, the two service information may use the same terminal identifier or different terminal identifiers, but both service information may be transmitted in one MAC PDU.

In the following, the implementation of the corresponding second terminal is described, it should be noted that, because the behavior of the second terminal corresponds to that of the first terminal, the implementation of the first terminal may be referred to for the use of a message in the implementation, or corresponding improvements may be made, and the following description is not repeated.

Fig. 5 is a schematic flow chart of an implementation of a method for receiving identification information at a second terminal, where as shown in the figure, the method may include:

step 501, a second terminal receives identification information of a first terminal, which is sent by the first terminal, wherein the identification information is used for the second terminal to determine whether the first terminal has established 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.

In the case where the identifier being used by the first terminal includes all identifiers used when the first terminal establishes a communication connection, the ID used when the first terminal previously establishes a connection with another terminal may not be used when establishing a connection with the second terminal, and it is not necessary to transmit the ID again. For example, the IDs used by the UE1 before include ID1, ID2, ID3, and the ID4 will be used when the UE1 establishes connection with the UE2, but when the UE1 establishes connection with the UE2, the ID1 is no longer used (possibly, the ID1 has been updated, or the connection established using ID1 is released, etc.), then the UE1 only needs to send the ID2, ID3, and ID4 to the UE2, that is, the IDs 2, ID3, ID4 are the IDs being used when the first terminal establishes connection with the second terminal. In other words, those skilled in the art will readily appreciate that the ID here is essentially the ID that helps the second terminal to determine whether a connection has been established.

the second terminal receives the identification information of the first terminal, wherein the identification information of the first terminal is sent when the first terminal sends the capacity of the first terminal to the second terminal;

the second terminal using previously stored capabilities of the first terminal; or the like, or, alternatively,

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.

In implementation, when the Direct Communication interface PC5-S connection is established, the identification information of the first terminal is sent, and the first terminal sends the identification information of the first terminal in a connection establishment Request message, for example, the first terminal sends through a Direct Communication Request message; or, the first terminal is sent through the Direct Communication Request message in the SA2 flow, but may also be sent in other messages, and the present invention is not limited thereto.

The first terminal sends the identification information of the first terminal in a connection establishment acceptance message, for example, the first terminal sends the identification information through a Direct Communication Accept message; or, the first terminal is sent through the Direct Communication Accept message in the SA2 flow, and may also be sent in other messages, which is not limited in the present invention;

the first terminal sends the message for sending the capability of the first terminal to the second terminal, for example, the first terminal sends the message for sending the capability in the RRC message, or may send the message in other messages, which is not limited in the present invention;

the second terminal does not establish a SL RRC connection with the first terminal, specifically, the connection is a connection of an AS layer and/or an NAS layer; or the like, or a combination thereof,

the second terminal does not send the capability of the first terminal to the first terminal, specifically, does not send the capability of the first terminal at an AS layer and/or an NAS layer; or the like, or a combination thereof,

the second terminal transmits the service information to the first terminal through the communication connection established with the first terminal, specifically, when the service information is transmitted, identifiers of the first terminal and the second terminal used by the first terminal and the second terminal in the communication connection established between the first terminal and the second terminal, or identifiers of the communication connection established between the first terminal and the second terminal; or the like, or, alternatively,

the second terminal transmits service information to the first terminal by using an identifier of the second terminal, where the identifier of the second terminal is an identifier of the second terminal used in a communication connection that has been established between the first terminal and the second terminal, and specifically, when transmitting the service information, the identifiers of the first terminal and the second terminal used may be identifiers of the first terminal and the second terminal used by the first terminal and the second terminal in a communication connection that has been established between the first terminal and the second terminal; or the like, or, alternatively,

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

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

the first terminal sends its identification information in a SL RRC connection setup message, e.g., the first terminal sends through a Sidelink RRC setup.

the second terminal informs the first terminal that the second terminal has established a communication connection with the first terminal, specifically, the connection is a connection of an AS layer and/or an NAS layer; or the like, or, alternatively,

the second terminal does not send the first terminal's capabilities to the first terminal; or the like, or a combination thereof,

the second terminal transmits service information to the first terminal by using the identifier of the second terminal, wherein the identifier of the second terminal is the identifier of the second terminal used in the communication connection established between the first terminal and the second terminal; or

indication information for terminating the RRC connection.

the second terminal does not send the first terminal's capabilities to the first terminal; or the like, or, alternatively,

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

the first terminal identifier is sent by the first terminal in the SL RRC connection establishment message; or the like, or a combination thereof,

indication information for terminating the RRC connection.

the first terminal transmits service information to the second terminal in one MAC PDU, wherein the service information comprises the service information transmitted in the communication connection established between the first terminal and the second terminal and new service information. The new service information may be understood as the service information to be transmitted when the first terminal establishes the communication connection with the second terminal.

In the technical solution provided by the embodiment of the present invention, a first terminal sends identification information of the first terminal to a second 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. Whether the users are the same end user can be identified through the identification information.

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

The following description will take UE1 and UE2 as examples.

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

1. the identification information sent to the peer UE2 is that all the identifications of the UE1 that have already established communication connection at present, that is, the identifications of the UE1 that have performed unicast connection at present are all sent to the peer UE2 together;

2. the identification information sent to the peer UE2 is: a combination of all identities for which the UE1 has presently established a communication connection, or an algorithmically generated identity, such as a HASH algorithm, for all identities for which the UE1 has presently established a communication connection. Channel resources can be saved compared with the former one;

if the identity of the UE is updated, the identity generated by the combination or algorithm is also updated;

3. the identification information sent to the peer UE2 is: a unique identity of the UE1, which may be network configured, pre-configured, or UE1 self-assigned.

The specific flow of transmitting the identification information may be as follows:

the first scheme is as follows: connection setup via PC 5-S.

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

For the UE2 side:

the UE2 determines whether it has established a connection with the UE1 through the received identification information of the UE 1.

If so, the UE2 replies in a Direct Communication Accept message using the UE2ID that has established a connection with the UE 1. The following operations may also be performed:

1) informing an Access Layer (AS Layer) of the UE2 that an AS Layer connection does not need to be established; there is no need to interact with UE capabilities either, since AS layer configuration may need to be configured according to different QoS (Quality of Service); transmitting subsequent services using the previously established connection;

2) not establishing communication connection of the NAS layer; UE capability interaction is also not required, since AS layer configuration may need to be configured according to different QoS; subsequent traffic is transmitted using the previously established connection.

1) And 2) the relationship of and/or, either or both may be performed.

For the UE1 side:

the UE1 determines that the UE2 is a UE that has established a connection according to the received Direct Communication Accept message sent by the UE 2.

1) (corresponding to 1 of UE 2)): informing the AS layer of the UE1 that an AS layer connection does not need to be established; interactive UE capabilities are also not required, since AS layer configuration may need to be configured according to different QoS; transmitting subsequent services using the established connection;

2) (2 for UE 2)): the communication connection of the NAS layer is not established; interactive UE capabilities are also not required, since AS layer configuration may need to be configured according to different QoS; subsequent traffic is transmitted using the established connection.

1) And 2) the relationship of and/or, either or both may be performed.

It may also be performed for the UE1 and the UE 2:

subsequent traffic is transmitted using the established connection, i.e., current traffic may be transmitted over the communication connection established by UE1 and UE2, with the same destination ID;

the Data packets with the same destination ID may be multiplexed in the same MAC PDU (media Access Control Protocol Data unit; MAC: Medium Access Control; PDU: Protocol Data Units, Protocol Data unit) for transmission (may be Data packets of different services).

2. The UE1 also sends a Direct Communication Request message carrying the UE1 identifier for the connection establishment according to the existing procedure, and the UE2 sends the identifier information of the UE2 in the Direct Communication Accept message.

For the UE 1:

the UE1 determines whether the UE2 has established a connection according to the reception of the Direct Communication Accept message transmitted by the UE 2.

If so, then:

1) informing the AS layer of the UE1 that RRC connection does not need to be established; UE capability interaction is also not required, since AS layer configuration may need to be configured according to different QoS; transmitting subsequent services using the established connection;

2) not establishing communication connection of the NAS layer; interactive UE capabilities are also not required, since AS layer configuration may need to be configured according to different QoS; transmitting subsequent services using the previously established connection;

1) and 2) a relationship of and/or, either or both may be performed.

Further, the UE2 may also be informed that the connection has been established, including:

for 1) above, depending on the AS layer connection establishment procedure, if it is UE1 that initiates the AS layer connection establishment procedure, then UE2 need not be notified;

for 2) above, the UE2 needs to be informed that the connection has been established, no communication connection at the NAS layer is established, and no UE capability interaction is required, and the previously established connection is used to transport subsequent traffic.

It may also be performed for the UE1 and the UE 2:

subsequent traffic is transmitted using the previously established connection, i.e., current traffic may be transmitted over the communication connection previously established by UE1 and UE2, with the same destination ID;

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

Scheme two is as follows: the identification information is transmitted through the SL RRC connection setup procedure.

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

For the UE2 side:

If so, the UE2 replies in the Sidelink RRC setup using the UE2ID that has established a connection with the UE1, and informs the UE1 that the connection has been established, so that it does not receive the Sidelink RRC setup complete message any more; no RRC connection needs to be established; nor does it need to store UE capabilities (AS layer configuration may need to be configured according to different QoS); subsequent traffic is transmitted using the previously established connection.

For the UE1 side:

the UE1 determines that the UE2 is a UE that has established connection according to the received Sidelink RRC setup sent by the UE2, so that the Sidelink RRC setup complete message is not being sent; no RRC connection needs to be established; interactive UE capabilities are also not required (AS layer configuration may need to be configured according to different QoS); subsequent traffic is transmitted using the previously established connection.

It may also be performed for the UE1 and the UE 2:

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

The UE1 determines whether the UE2 has previously established a connection according to the reception of the Sidelink RRC setup transmitted by the UE 2.

If the establishment is finished, the UE2 is informed in a Sidelink RRC setup complete message without establishing RRC connection; interactive UE capabilities are also not required (AS layer configuration may need to be configured according to different QoS); subsequent traffic is transmitted using the previously established connection.

The Sidelink RRC setup complete message includes one or more of UE1ID transmitted by UE1 in the Sidelink RRC setup request, layer-2ID used when UE2 and UE1 previously establish a connection, and IE (Information Element) indicating that the RRC connection is released.

It may also be performed for the UE1 and the UE 2:

The third scheme is as follows: by sending UE capabilities or requesting UE capabilities.

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

For the UE2 side:

If so, the UE2 replies to the UE1 (or may not reply) with the UE2ID that has established a connection with the UE1, or replies to a message that the UE1 has established a connection. The following operations may also be performed:

1) not send the capability of UE2 to UE 1;

2) using previously stored capabilities of the UE 1;

3) the capabilities of the UE1 are not stored.

1) And 2), and 3) are and/or, either or both may be performed.

For the UE1 side:

if the UE1 does not receive any message for the UE2, no action may be taken;

if the UE1 receives the UE2ID or the message about connection establishment sent by the UE2, it is determined that the UE2 is a UE about connection establishment according to the reception of the UE2ID or the message about connection establishment.

1) Using previously stored capabilities of the UE 2;

2) the capabilities of the UE2 are not stored.

1) And 2) the relationship of and/or, either or both may be performed.

The direct link system of NR will be described as an example.

Example 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 a Direct Communication Request message.

Fig. 6 is a schematic diagram of a user identification process implementation flow 1, as shown in the figure, which may include:

step 601, the UE1 sends the identification information of the UE1 through Direct Communication Request message.

The UE2 determines whether it has previously established a connection with the UE1 through the received identification information of the UE 1.

If so, the UE2 replies in a Direct Communication Accept message with the UE2ID that had previously established a connection with the UE 1.

In step 602, the UE2 replies with a Direct Communication Accept message including the UE2ID that had previously established a connection with the UE1, notifying the UE1 that a connection has been established.

At this time, the following steps are also included:

1) informing the AS layer of the UE2 that the connection between AS layers does not need to be established and the UE capability does not need to be interacted, and transmitting the subsequent service by using the previously established connection;

2) and the communication connection of the NAS layer is not established, the UE interaction capability is not required, and the previously established connection is used for transmitting the subsequent service.

1) And 2) a relationship of and/or, either or both may be performed.

The UE1 determines that the UE2 is a UE that has previously established a connection according to the reception of the Direct Communication Accept message sent by the UE 2.

1) Informing the AS layer of the UE1 that the connection of AS layer is not required to be established and the capability of UE interaction is not required, and transmitting the subsequent service by using the previously established connection;

2) and the communication connection of the NAS layer is not established, the capability of the UE does not need to be interacted, and the previously established connection is used for transmitting the subsequent service.

1) And 2) a relationship of and/or, either or both may be performed.

Step 603, if the V2X service data over unified link (V2X unicast service data) is established, transmitting data on the previous connection.

Subsequent traffic is transmitted using the previously established connection, i.e., current traffic may be transmitted over the communication connection previously established by the UE1 and the UE2, with the same destination ID.

If the connection is not established, then,

establishing AS layer connection for the step 1);

and 2) establishing the communication connection of the NAS layer.

Example 2: in this example, the identification information is transmitted when the PC5-S establishes a connection, the UE1 still sends a Direct Communication Request message carrying the identification of the UE1 used for the connection establishment according to the existing procedure, and the UE2 sends the identification information of the UE2 in the Direct Communication Accept message.

Fig. 7 is a schematic diagram of a process flow 2 for implementing a user identification process, as shown in the figure, the process flow may include:

in step 701, the UE1 sends the UE1id for establishing the connection through Direct Communication Request message.

In step 702, after receiving the Direct Communication Request message sent by the UE1, the UE2 sends the identification information of the UE2 in a Direct Communication Accept message.

The UE1 determines whether it has previously established a connection with the UE2 by receiving the Direct Communication Accept message sent by the UE2 and the received identification information of the UE 2.

If so, then:

1) and 2) the relationship of and/or, either or both may be performed.

Step 703, optionally, the UE1 may also notify the UE2 that the connection has been established (depending on the AS layer connection establishment procedure, if the UE1 initiates the AS layer connection establishment procedure, then the UE2 does not need to be notified), then there are:

1) informing the AS layer of the UE2 that RRC connection does not need to be established; UE capability interaction is also not required, since AS layer configuration may need to be configured according to different QoS; transmitting subsequent services using the established connection;

2) the communication connection of the NAS layer is not established; UE capability interaction is also not required, since AS layer configuration may need to be configured according to different QoS; subsequent traffic is transmitted using the previously established connection.

1) And 2) a relationship of and/or, either or both may be performed.

And step 704, if the V2X service data over unicast link (V2X unicast service data) is established, transmitting data on the previous connection.

If no connection is established:

establishing AS layer connection for the step 1);

and 2) establishing the communication connection of the NAS layer.

Example 3: in this example, the UE1 sends the identification information of UE1 via Sidelink RRC setup request by transmitting the identification information during SL RRC connection establishment.

Fig. 8 is a schematic diagram of a process 3 implemented by a user identification process, as shown, the process may include:

step 801, the UE1 sends the identification information of the UE1 through the Sidelink RRC setup request.

If so, the UE2 replies in the Sidelink RRC setup with that UE2ID that had previously established a connection with UE 1.

Step 802, the UE2 replies through the Sidelink RRC setup, including the UE2ID that had previously established a connection with the UE1, informing the UE1 that a connection has been established.

At this time, the following steps can be carried out:

1) the AS layer of the UE2 does not need to establish AS layer connection and interact UE capability, and uses the connection established before to transmit subsequent services;

1) And 2) a relationship of and/or, either or both may be performed.

The UE1 determines that the UE2 is a UE that has previously established a connection according to the reception of the Sidelink RRC setup sent by the UE 2.

1) The AS layer of the UE1 transmits subsequent services by using the previously established connection without establishing AS layer connection and interacting UE capability;

1) And 2) a relationship of and/or, either or both may be performed.

And step 803, if the V2X service data over unicast link (V2X unicast service data) is established, transmitting data on the previous connection.

If no connection is established:

establishing AS layer connection for the step 1);

and 2) establishing the communication connection of the NAS layer.

Example 4: in this example, through transmitting the identification information in the SL RRC connection setup procedure, the UE1 carries the source identification and the destination identification (same as the current procedure) for connection setup in the Sidelink RRC setup request message, and the UE2 sends the identification information of the UE2 in the Sidelink RRC setup.

Fig. 9 is a schematic diagram of a user identification process implementing flow 4, as shown, the process may include:

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

After receiving the Sidelink RRC setup request sent by the UE1, the UE2 sends the identification information of the UE2 in the Sidelink RRC setup, but the identification information of the UE2 may be sent in another message.

The UE1 determines whether it has previously established a connection with the UE2 according to the received identity information of the UE2 according to the received Sidelink RRC setup sent by the UE 2.

If so, then:

1) the AS layer of the UE1 does not need to establish RRC connection; interactive UE capabilities are also not required, since AS layer configuration may need to be configured according to different QoS; transmitting subsequent services using the established connection;

2) the communication connection of the NAS layer is not established; interactive UE capabilities are also not required, since AS layer configuration may need to be configured according to different QoS; transmitting subsequent services using the previously established connection;

1) and 2) the relationship of and/or, either or both may be performed.

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

1) the AS layer of UE2 does not need to establish RRC connection; UE capability interaction is also not required, since AS layer configuration may need to be configured according to different QoS; transmitting subsequent services using the established connection;

2) not establishing communication connection of the NAS layer; interactive UE capabilities are also not required, since AS layer configuration may need to be configured according to different QoS; subsequent traffic is transmitted using the previously established connection.

1) And 2) a relationship of and/or, either or both may be performed.

For example, the UE1 may notify the UE2 that the connection has been established via a Sidelink RRC setup complete message that includes one or more of the UE1ID sent by the UE1 in the Sidelink RRC setup request, the layer-2ID used by the UE2 and the UE1 when the connection was previously established, and the IE indicating that the RRC connection is released.

Step 904, if the V2X service data over unified link (V2X unicast service data) is established, transmitting data on the previous connection.

If the connection is not established;

establishing AS layer connection for the step 1);

and 2) establishing the communication connection of the NAS layer.

Example 5: in this example, the UE1 carries the identification information of the UE1 in the message of transmitting UE capability or requesting UE capability by transmitting the identification information in the message of transmitting UE capability or requesting UE capability, and optionally, the UE2 replies with the identification information of the UE2 and/or the capability of the UE 2.

Fig. 10 is a schematic diagram of a user identification process implementation flow 5, as shown, which may include:

step 1001, the UE1 transmits the identification information of the UE1 in a message transmitting the UE capability or requesting the UE capability.

If so, optionally, the UE2 replies to the UE1 (or may not reply) with the UE2ID that had previously established a connection with the UE1, or replies to a message that the UE1 has established a connection.

Step 1002, which is an optional step, the UE2 replies to the UE1, which includes the UE2ID that has previously established a connection with the UE1, and notifies the UE1 that a connection has been established.

At this time, the following steps are also included:

1) not send the capability of UE2 to UE 1;

2) using previously stored capabilities of the UE 1;

3) the capabilities of the UE1 are not stored.

1) And 2), and 3) are and/or, either or both may be performed.

The UE1 determines that the UE2 is a UE that has previously established a connection according to receiving the notification that the UE2ID sent by the UE2 or the connection with the UE1 has been established, then,

1) using previously stored capabilities of the UE 2;

2) the capabilities of the UE2 are not stored.

1) And 2) a relationship of and/or, either or both may be performed.

Other embodiments are similar to embodiments 1 to 5, and are modified accordingly, and are not described herein again.

Based on the same inventive concept, the embodiment of the invention also provides the terminal equipment, the identification information sending device, the identification information receiving device and the computer readable storage medium.

When the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.

Fig. 11 is a schematic structural diagram of a first terminal device, and as shown in the figure, the user device includes:

the processor 1100, which reads the program in the memory 1120, performs the following processes:

a transceiver 1110 for receiving and transmitting data under the control of the processor 1100.

an identity being used by the first terminal, an identity combination being used by the first terminal, and a unique identity of the first terminal.

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

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 implementation, the first terminal sends the first terminal identification information in a connection establishment acceptance message, and when receiving a notification that the first terminal and the second terminal have established a connection, or the identification information of the second terminal, sent by the second terminal, the method further includes one or a combination of the following steps:

In implementation, the first terminal sends the identification information of the first terminal in a SL RRC connection establishment request message, and if a notification that the first terminal and the second terminal have established a connection, or the identification information of the second terminal, sent by the second terminal is received, the method further includes one or a combination of the following steps:

indication information for terminating the RRC connection.

the first terminal ID sent by the first terminal in the SL RRC connection setup message; or the like, or a combination thereof,

indication information for terminating the RRC connection.

the first terminal transmits service information to the second terminal in one MAC PDU, wherein the service information comprises the service information transmitted in the communication connection established between the first terminal and the second terminal and new service information.

Where in fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1100, and various circuits, represented by memory 1120, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1110 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 1130 may also be an interface to externally connect desired devices including, but not limited to, a keypad, display, speaker, microphone, 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 in performing operations.

Fig. 12 is a schematic structural diagram of a second terminal device, and as shown in the figure, the user device includes:

a processor 1200, for reading the program in the memory 1220, and executing the following processes:

a transceiver 1210 for receiving and transmitting data under the control of the processor 1200.

In implementation, the identifiers used by the first terminal include all identifiers used when the first terminal establishes the communication connection; or the like, or, alternatively,

the method comprises the steps that a second terminal receives identification information of a first terminal sent by the first terminal, wherein the identification information of the first terminal is sent by the first terminal when a direct link radio resource control (SL) RRC connection is established by the first terminal;

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

and/or

the second terminal does not send the capability of the second terminal to the first terminal; or the like, or a combination thereof,

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

notifying a second terminal not to send the capability of the second terminal to the first terminal; or the like, or a combination thereof,

informing a second terminal to transmit service information to the first terminal through the communication connection established with the first terminal; or the like, or a combination thereof,

the second terminal transmits service information to the first terminal by using the identifier of the second terminal, wherein the identifier of the second terminal is the identifier of the second terminal used in the communication connection established between the first terminal and the second terminal; or the like, or a combination thereof,

the second terminal does not establish a SL RRC connection with the first terminal; or the like, or a combination thereof,

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

indication information for terminating the RRC connection.

Where, in fig. 12, the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors, represented by processor 1200, and various circuits, represented by memory 1220, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1210 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 1230 may also be an interface capable of interfacing externally to a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

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

An embodiment of the present invention further provides an apparatus for sending identification information, including:

For specific implementation, reference may be made to implementation of the identifier information sending method, which is not described in detail again.

An embodiment of the present invention further provides an apparatus for receiving identification information, including:

For specific implementation, reference may be made to implementation of the identifier information receiving method, which is not described in detail again.

For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program for executing the above-mentioned identification information sending or receiving method is stored in the computer-readable storage medium. For specific implementation, reference may be made to implementation of the identifier information sending or receiving method, which is not described in detail herein.

In summary, in the technical solution provided in the embodiment of the present invention, a first terminal sends identification information of the first terminal to a second 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.

In the technical scheme provided by the embodiment of the invention, a scheme for identifying the user is provided, so that the only unicast connection can be established between two pieces of UE in the unicast connection, only one unicast connection needs to be maintained, one piece of UE context is stored, and the resource is saved.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An identification information transmission method, comprising:

a first terminal sends identification information of the first terminal to a second terminal, wherein the identification information is used for the second terminal to determine whether the first terminal establishes communication connection with the second terminal;

the first terminal sends the identification information of the first terminal to the second terminal by adopting at least one of the following modes:

when the direct communication interface PC5-S connection is established, the identification information of the first terminal is sent, 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 identification information of the first terminal is sent when a direct link radio resource control (SL RRC) connection is established, and the identification information of the first terminal is sent by the first terminal in a SL RRC connection establishment request message; or, the first terminal sends the identification information of the first terminal in a SL RRC connection establishment message;

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

the first terminal does not establish SL RRC connection with the second terminal;

the first terminal does not send the capability of the first terminal to the second terminal;

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

the first terminal transmits service information to the second terminal by using the identifier of the second terminal, wherein the identifier of the second terminal is the identifier of the second terminal used in the communication connection established between the first terminal and the second terminal;

2. The method of claim 1, wherein the identification information of the first terminal comprises one or more of the following information:

3. The method of claim 2, wherein the identities being used by the first terminal comprise all identities used by the first terminal when establishing a communication connection; or the like, or a combination thereof,

4. The method of claim 1, wherein the manner in which the first terminal sends the identification information of the first terminal to the second terminal further comprises at least one of:

5. The method of claim 4,

when a first terminal sends identification information of the first terminal to a second terminal when the first terminal sends the capability of the first terminal to the second terminal, if a notification that the first terminal and the second terminal have established connection, or the identification information of the second terminal, sent by the second terminal, is received, the method further comprises one or a combination of the following steps:

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.

6. The method of claim 1, further comprising in the SL RRC connection setup message one or a combination of:

the identifier of the first terminal and the identifier of the second terminal are used when the second terminal and the first terminal establish connection; or indication information for terminating the RRC connection.

7. The method of claim 1, wherein the SL RRC connection setup complete message includes one or a combination of:

8. The method according to any of claims 4 to 7, wherein upon determining that the first terminal has established a communication connection with the second terminal, further comprising:

9. An identification information receiving method, characterized by comprising:

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

the second terminal determines whether a communication connection is established with the first terminal according to the identification information;

the second terminal receives the identification information of the first terminal sent by the first terminal, and the identification information of the first terminal is received by adopting at least one of the following modes:

the second terminal receives the identification information of the first terminal sent by the first terminal when the communication connection is established, wherein the identification information of the first terminal is sent by the first terminal when the direct communication interface PC5-S connection is established by the first terminal;

the method comprises the steps that a second terminal receives identification information of a first terminal sent by the first terminal when communication connection is established, wherein the identification information of the first terminal is sent by the first terminal when a direct link radio resource control (SL) Radio Resource Control (RRC) connection is established by the first terminal;

when establishing the direct communication interface PC5-S connection, sending the identification information of the first terminal, wherein 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 the connection establishment receiving message;

when a direct link radio resource control (SL RRC) connection is established to send identification information of the first terminal, the first terminal sends the identification information of the first terminal in a SL RRC connection establishment request message; or, the first terminal sends the identification information of the first terminal in a SL RRC connection establishment message;

the first terminal sends the identification information of the first terminal through the connection establishment request message/connection establishment accept message/SL RRC connection establishment request message/SL RRC connection establishment message, and when it is determined that the first terminal has established a communication connection with the second terminal according to the identification information of the first terminal, the method further includes one or a combination of the following steps:

the second terminal informs the first terminal that the second terminal has established communication connection with the first terminal;

the second terminal sends a second terminal identification to the first terminal when the communication connection with the first terminal is established;

the second terminal does not establish a SL RRC connection with the first terminal;

the second terminal does not send the capabilities of the second terminal to the first terminal;

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

the second terminal transmits service information to the first terminal by using the identifier of the second terminal, wherein the identifier of the second terminal is the identifier of the second terminal used in the communication connection established between the first terminal and the second terminal;

10. The method of claim 9, wherein the identification information of the first terminal includes one or more of the following information:

11. The method of claim 10, wherein the identities being used by the first terminal include all identities used by the first terminal when establishing the communication connection; or the like, or a combination thereof,

the identification combination being used by the first terminal comprises: the method comprises the steps that a first terminal establishes all identification combinations used in communication connection or all identification combinations used in communication connection and identification generated through an algorithm; or the like, or a combination thereof,

12. The method of claim 9, wherein the manner in which the second terminal receives the identification information of the first terminal sent by the first terminal further comprises at least one of:

the second terminal receives the identification information of the first terminal sent by the first terminal, wherein the identification information of the first terminal is sent when the first terminal sends the capacity of the first terminal to the second terminal;

13. The method of claim 12,

when the first terminal sends the identification information of the first terminal to the second terminal when the first terminal sends the capability of the first terminal to the second terminal, if the second terminal determines that the first terminal has established communication connection with the second terminal according to the identification information, the method further comprises one or the combination of the following steps:

the second terminal using the previously stored capabilities of the first terminal; or the like, or a combination thereof,

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.

14. The method of claim 9, further comprising including in the SL RRC connection setup message one or a combination of:

15. The method of claim 9, wherein the SL RRC connection setup complete message includes one or a combination of the following:

16. The method according to any of claims 12 to 15, wherein upon determining that the first terminal has established a communication connection with the second terminal, further comprising:

17. A first terminal device, comprising:

a processor for reading the program in the memory and executing the following processes:

when the direct communication interface PC5-S connection is established, the identification information of the first terminal is sent, 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 the connection establishment receiving message;

the identification information of the first terminal is sent when a direct link radio resource control (SL RRC) connection is established, and the identification information of the first terminal is sent by the first terminal in an SL RRC connection establishment request message; or, the first terminal sends the identification information of the first terminal in a SL RRC connection establishment message;

wherein, the first terminal sends the first terminal identification information in a connection establishment acceptance message/a connection establishment request message/a SL RRC connection establishment message, and when receiving a notification that the first terminal and the second terminal have established a connection or the identification information of the second terminal sent by the second terminal, the method 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;

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

18. The apparatus of claim 17, wherein the identification information of the first terminal comprises one or more of the following information:

19. The apparatus of claim 18, wherein the identities being used by the first terminal include all identities used by the first terminal when establishing a communication connection; or the like, or, alternatively,

20. The apparatus of claim 17, wherein the manner in which the first terminal sends the identification information of the first terminal to the second terminal further comprises at least one of:

21. The apparatus of claim 20,

when a first terminal sends identification information of the first terminal to a second terminal when the first terminal sends the capability of the first terminal to the second terminal, if a notification that the first terminal and the second terminal have established connection, or the identification information of the second terminal, sent by the second terminal is received, the method further comprises one or the combination of the following steps:

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.

22. The apparatus of claim 17, further comprising in the SL RRC connection setup message one or a combination of:

23. The apparatus of claim 17, wherein the SL RRC connection setup complete message includes one or a combination of:

24. The apparatus according to any of claims 20 to 23, upon determining that the first terminal has established a communication connection with the second terminal, further comprising:

25. A second terminal device, comprising:

the second terminal informs the first terminal that the second terminal establishes communication connection with the first terminal;

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

26. The apparatus of claim 25, wherein the identification information of the first terminal comprises one or more of:

27. The apparatus of claim 26, wherein the identities being used by the first terminal include all identities used by the first terminal when establishing the communication connection; or the like, or, alternatively,

28. The apparatus of claim 26, wherein the manner in which the second terminal receives the identification information of the first terminal sent by the first terminal further comprises at least one of:

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

29. The apparatus of claim 28,

when the first terminal sends the identification information of the first terminal to the second terminal when the first terminal sends the capability of the first terminal to the second terminal, and if the second terminal determines that the first terminal and the second terminal have established communication connection according to the identification information, the method further comprises one or a combination of the following steps:

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 capability of the second terminal, and if the second terminal determines that the first terminal has established communication connection with the second terminal according to the identification information, the method further comprises one or a combination of the following steps:

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

30. The apparatus of claim 25, further comprising in the SL RRC connection setup message one or a combination of:

31. The apparatus of claim 25, wherein a SL RRC connection setup complete message includes one or a combination of:

32. The apparatus according to any of claims 28 to 31, upon determining that the first terminal has established a communication connection with the second terminal, further comprising:

33. An identification information transmitting apparatus, comprising:

a sending module, configured to send, on a first terminal, identification information of the first terminal to a 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;

34. An identification information receiving apparatus, comprising:

a receiving module, configured to receive, at a second terminal, identification information of a 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;

a connection judging module, configured to determine whether the second terminal has established a communication connection with the first terminal according to the identification information;

the method comprises the steps that a second terminal receives identification information of a first terminal sent by the first terminal when the first terminal establishes communication connection, wherein the identification information of the first terminal is sent by the first terminal when the first terminal establishes direct link radio resource control (SL) RRC connection;

when a direct link radio resource control (SL RRC) connection is established to send 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 a SL RRC connection establishment message;

wherein, the first terminal sends the identification information of the first terminal through the connection establishment request message/connection establishment acceptance message/SL RRC connection establishment request message/SL RRC connection establishment message, and when determining that the first terminal has established a communication connection with the second terminal according to the identification information of the first terminal, the method further includes one or a combination of the following steps:

the second terminal does not establish SL RRC connection with the first terminal;

the second terminal does not send the capability of the second terminal to the first terminal;

35. A computer-readable storage medium, characterized in that it stores a computer program for executing the method of any one of claims 1 to 16.