WO2020063263A1

WO2020063263A1 - Link release method for sidelink, and terminal

Info

Publication number: WO2020063263A1
Application number: PCT/CN2019/103995
Authority: WO
Inventors: 郑倩; 杨晓东
Original assignee: 维沃移动通信有限公司
Priority date: 2018-09-25
Filing date: 2019-09-02
Publication date: 2020-04-02
Also published as: CN110944306A

Abstract

Disclosed are a link release method for a sidelink, and a terminal. The method comprises: receiving a connection release request message for a unicast link of a sidelink, the message being sent from a second terminal; and releasing the unicast link according to the connection release request message.

Description

Link release method and terminal of side link

Cross-reference to related applications

This application claims the priority of Chinese Patent Application No. 201811116603.2 filed in China on September 25, 2018, the entire contents of which are hereby incorporated by reference.

Technical field

The present disclosure relates to the field of communication technologies, and in particular, to a link release method and a terminal for a side link.

Background technique

In order to meet different application scenarios, the mobile communication system not only supports uplink (Uplink) transmission and downlink (Downlink) transmission, but also supports sidelink (Sidelink), also known as secondary link, side link, side chain Road and other transmission, side-link transmission is used for direct transmission between terminals without network equipment.

Among them, the side link transmission can be used to support public safety services such as emergency places for disasters such as fires or earthquakes, or basic safety communication for vehicles (V2X). However, in the related art, the side link communicates based on the broadcast mechanism. The sending terminal cannot determine the receiving result of the receiving terminal. In order to improve the transmission reliability, the sending terminal always sends data to the receiving terminal according to the maximum number of retransmissions. The system's wireless resource utilization is low and cannot meet the quality requirements of advanced V2X services, such as advanced driving V2X services that require low latency, high reliability, and large data volumes, such as autonomous driving and sensor expansion.

Summary of the Invention

Embodiments of the present disclosure provide a method and a terminal for releasing a link of a side link, so as to solve the problems of low side link radio resource utilization and low link management efficiency in the related art.

In a first aspect, an embodiment of the present disclosure provides a link release method for a side link, which is applied to a first terminal and includes:

Receiving a connection release request message for a unicast link of a side link sent by a second terminal;

Release the unicast link according to the connection release request message.

In a second aspect, an embodiment of the present disclosure provides a link release method for a side link, which is applied to a second terminal and includes:

A connection release request message for a unicast link of a side link is sent to the first terminal.

In a third aspect, an embodiment of the present disclosure further provides a terminal, including:

A first receiving module, configured to receive a connection release request message for a unicast link of a side link sent by a second terminal;

A link release module is configured to release the unicast link according to the connection release request message.

In a fourth aspect, an embodiment of the present disclosure provides a terminal, including:

A first sending module is configured to send a connection release request message of a unicast link of a side link to a first terminal.

In a fifth aspect, an embodiment of the present disclosure further provides a terminal including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program is executed by the processor At this time, the steps of the link release method of the side link as described above are implemented.

According to a sixth aspect, an embodiment of the present disclosure further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements the above-mentioned side link. Steps of the link release method.

In this way, in the embodiment of the present disclosure, by receiving a connection release request message for a unicast link of a side link sent by the second terminal, and releasing the unicast link according to the connection release request message, the terminal can be effectively supported in The timely release of the established unicast link connection on the side link is conducive to improving wireless resource utilization and link management efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the drawings used in the description of the embodiments of the present disclosure are briefly introduced below. Obviously, the drawings in the following description are just some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative labor.

FIG. 1 shows one of the flowcharts of a method for releasing a link of a side link according to an embodiment of the present disclosure;

2 is a schematic flowchart of a method for releasing a link of a side link according to an embodiment of the present disclosure;

3 is a third flowchart of a method for releasing a link of a side link according to an embodiment of the present disclosure;

FIG. 4 shows one of the structural schematic diagrams of a terminal provided by an embodiment of the present disclosure;

5 is a second schematic structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 6 shows a block diagram of a terminal provided by an embodiment of the present disclosure.

detailed description

Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a thorough understanding of the present disclosure, and to fully convey the scope of the present disclosure to those skilled in the art.

The terms "first", "second", and the like in the specification and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. Furthermore, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units need not be limited to those explicitly listed Those steps or units may instead include other steps or units not explicitly listed or inherent to these processes, methods, products or equipment. "And / or" in the specification and claims means at least one of the connected objects.

As shown in FIG. 1, it is a schematic flowchart of a link release method of a side link provided by an embodiment of the present disclosure. The method is applied to a first terminal.

Step 101: Receive a connection release request message for a unicast link of a side link sent by a second terminal;

Here, before the second terminal sends a connection release request message for the unicast link of the side link, a point-to-point unicast link connection has been established between the first terminal and the second terminal, that is, the connection between the first terminal and the second terminal Are connected.

Here, the side link may include: a new air interface (New Radio, NR) Sidelink.

Step 102: Release the unicast link according to the connection release request message.

The method for releasing a side link connection according to the embodiment of the present disclosure is capable of releasing the unicast link according to the connection release request message by receiving a connection release request message for a side link unicast link sent by a second terminal. Effectively supporting the timely release of the unicast link connection established by the terminal on the side link, which is conducive to improving wireless resource utilization and link management efficiency, and can effectively support advanced V2X unicast services.

Optionally, the connection release request message includes at least one of the following information:

Source identification,

Purpose identification,

A cause value indicating the reason for the connection release of the unicast link, and

Radio resources for transmitting discovery signals.

The reason for the connection release includes at least one of the following:

A quality of service QoS of a data packet or a data stream transmitted through the unicast link does not satisfy a preset threshold condition,

A wireless link failure occurs on a unicast link with the second terminal,

The channel quality of the unicast link is lower than a second threshold, and

The reference signal quality of the unicast link is lower than a third threshold.

Here, optionally, the quality of service (QoS) includes: service priority (Priority), latency (ms), reliability (%), communication distance (Communication range) (meters), payload size (bytes), transmission rate (message) (sec), and data rate (Mbps).

It should be noted that the above-mentioned QoS of the data packet or data stream transmitted by the unicast link does not satisfy the preset threshold condition, indicating that the connection of the unicast link cannot satisfy the data packet or data of the first terminal and the second terminal. Flow QoS requirements.

The channel quality of the unicast link is lower than the second threshold value, which indicates that the channel quality of the unicast link between the first terminal and the second terminal is poor.

Based on the embodiment shown in FIG. 1, as an optional implementation manner, after step 102, the method may further include the following steps:

Feedback to the second terminal about the completion information of connection release, and the indication information is used to instruct the first terminal to release the unicast link.

Here, optionally, the indication information of completion of connection release includes at least one of the following:

Physical layer feedback information,

Radio Link Control RLC layer feedback information, and

Unicast link release complete message.

Here, the physical layer feedback information specifically refers to the physical layer feedback information of the first terminal.

The radio link control (Radio Link Control, RLC) layer feedback information specifically refers to the RLC feedback information of the first terminal.

The unicast link release complete message is used to respond to the unicast link connection establishment release message, which indicates that the unicast link release was successful.

The access AS layer informs the upper layer of the release of the unicast link.

In this step, the upper layer includes more than the Access Stratum (AS). That is, the NAS layer and / or the application layer.

Access the AS layer to send or receive discovery signals;

or,

The AS layer sends or receives the discovery signal under an upper layer notification, and the upper layer notification is sent by the upper layer after the AS layer notifies the release of the unicast link.

Here, the AS layer of the first terminal sends a discovery discovery signal directly (self) or indirectly (upper-layer notification), the purpose of which is to actively inform other surrounding terminals that they are currently idle, and can communicate with any of the other terminals. The terminal establishes a unicast link connection.

The AS layer of the first terminal receives the discovery signal in a direct (own) or indirect (upper-layer notification) manner, and through the received discovery signal, it can be known which terminals around it can establish a unicast link connection with it.

It should be noted that the upper layer includes more than the AS layer, such as the NAS layer and / or the application layer.

Based on the embodiment shown in FIG. 1, as an optional implementation manner, before step 101, the method may further include the following steps:

Sending a connection establishment request message of the unicast link to the second terminal to establish a unicast link with the second terminal;

or,

Receiving a connection establishment request message for the unicast link sent by the second terminal to establish a unicast link with the second terminal.

Here, the implementation of the above steps indicates that the first terminal is the initiator of connection establishment of the unicast link, or the first terminal is the initiator of connection establishment of the unicast link.

It should be noted that, in the case where the first terminal is a connection establishment initiator of the unicast link, the source identifier in the connection release request message is the source identifier of the first terminal, and the destination identifier is the identifier of the second terminal. Destination ID.

In the case where the first terminal establishes the initiator for the connection of the unicast link, the source identifier in the connection release request message is the source identifier of the second terminal, and the destination identifier is the destination identifier of the first terminal. ID).

A method for releasing a link of a side link according to an embodiment of the present disclosure, by receiving a connection release request message for a unicast link of a side link sent by a second terminal, and releasing the unicast link according to the connection release request message. It can effectively support the timely release of the unicast link connection established by the terminal on the side link, which is conducive to improving the wireless resource utilization and link management efficiency, and can effectively support the advanced V2X unicast service.

As shown in FIG. 2, it is a schematic flowchart of a link release method of a side link provided by an embodiment of the present disclosure. The method is applied to a second terminal.

Step 201: Send a connection release request message for a unicast link of a side link to a first terminal.

Here, before the second terminal sends a connection release request message for the unicast link of the side link to the first terminal, a point-to-point unicast link connection has been established between the first terminal and the second terminal, that is, the first terminal It is in a connected state with the second terminal.

Here, the side link may include: NR Sidelink.

The method for releasing a link of a side link in the embodiment of the present disclosure sends a connection release request message for a unicast link of a side link to a first terminal, so that the first terminal releases the unicast chain according to the connection release request message. It can effectively support the timely release of the unicast link connection established by the terminal on the side link, which is conducive to improving the wireless resource utilization and link management efficiency, and can effectively support the advanced V2X unicast service.

Based on the embodiment shown in FIG. 2, as an optional implementation manner of the present disclosure, step 201 may specifically include the following steps:

When a preset condition is satisfied, a connection release request message for a unicast link of a side link is sent to the first terminal.

Optionally, the preset condition includes at least one of the following:

Receiving a release request for instructing to release a unicast link between the first terminal and the release request, which is sent by an upper layer;

It should be noted that the release request is determined by the upper layer according to the auxiliary information reported by the AS layer; wherein the auxiliary information is reported based on an event trigger, or the auxiliary information is reported periodically.

Here, the specific implementation is as follows:

The AS layer reports auxiliary information to the upper layer. After receiving the auxiliary information, the upper layer requests the AS layer to release the unicast link connection established with the first terminal or instruct it to release all established unicast link connections.

Optionally, the auxiliary information includes at least one of quality of service QoS, wireless link failure information, channel quality information, and reference signal quality information.

Here, the QoS includes at least one of service priority, delay, reliability, communication distance, payload size, transmission rate, and data rate.

The access AS layer determines to release a unicast link with the first terminal.

Here, specifically, the AS layer determines to release the unicast link connection established with the first terminal or release all established unicast link connections.

Based on the embodiment shown in FIG. 2, optionally, the connection release request message includes at least one of the following information:

Source identification,

Purpose identification,

Radio resources for transmitting discovery signals.

The reason for the connection release includes at least one of the following:

A QoS quality of a data packet or a data stream transmitted through the unicast link is lower than a first threshold value and does not satisfy a preset threshold condition,

A wireless link failure occurs on a unicast link with the first terminal,

The channel quality of the unicast link is lower than a second threshold, and

Here, optionally, the QoS includes at least one of service priority, delay, reliability, communication distance, payload size, transmission rate, and data rate.

Based on the embodiment shown in FIG. 2, as an optional implementation manner, after step 201, the method may further include the following steps:

Receiving indication information for connection release completion sent by the first terminal, where the indication information is used to instruct the first terminal to release the unicast link.

Physical layer feedback information,

Radio Link Control RLC layer feedback information, and

Unicast link release complete message.

The RLC layer feedback information specifically refers to RLC feedback information of the first terminal.

Further, after receiving the connection release completion indication information sent by the first terminal, the method may further include the following steps:

Access the AS layer to send or receive discovery signals;

or,

Here, the AS layer of the second terminal sends a discovery signal directly (self) or indirectly (upper-layer notification), the purpose of which is to actively inform other nearby terminals that they are currently idle, and can communicate with other terminals. Any terminal establishes a unicast link connection.

The AS layer of the second terminal receives the discovery signal in a direct (own) or indirect (upper-layer notification) manner, and through the received discovery signal, it can be known which terminals around it can establish a unicast link connection with it.

It should be noted that the upper layer includes more than the AS layer. That is, the NAS layer and / or the application layer.

Based on the embodiment shown in FIG. 2, as an optional implementation manner, before step 201, the method may further include the following steps:

Receiving a connection establishment request message for the unicast link sent by the first terminal to establish a unicast link with the first terminal;

or,

Sending a connection establishment request message of the unicast link to the first terminal to establish a unicast link with the first terminal.

Here, the implementation of the above steps indicates that the second terminal is the initiator of connection establishment of the unicast link, or the second terminal is the initiator of connection establishment of the unicast link.

It should be noted that in the case where the second terminal is the initiator of the unicast link connection, the source identifier in the connection release request message is the source identifier sourceID of the second terminal, and the destination identifier is the destination identifier of the first terminal destination ID.

In the case where the second terminal establishes the initiator for the connection of the unicast link, the source identifier in the connection release request message is the source identifier sourceID of the first terminal, and the destination identifier is the destination identifier destinationID of the second terminal.

The following uses FIG. 3 as an example to specifically describe a specific implementation process of the link release method of the side link.

It should be noted that in FIG. 3, UE_1 represents a first terminal, and UE_2 represents a second terminal. Among them, UE_1 is the initiator of establishing a unicast link connection with UE_2, or the initiator of establishing a unicast link connection with UE_2.

S1: When a preset condition is satisfied, UE_1 triggers sending a Unicast Link Release Request message to UE_2. That is, the Unicast LinkRelease Request message shown by ① in FIG. 3.

The preset conditions include at least one of the following:

a. A release request is received to indicate the release of the unicast link between UE_2 and the release request, which is sent by the upper layer.

Here, the upper layer includes more than the AS layer. That is, the NAS layer and / or the application layer.

The specific implementation is as follows:

The AS layer reports auxiliary information to the upper layer. After receiving the auxiliary information, the upper layer requests the AS layer to release the unicast link connection established with UE_2 or instruct it to release all established unicast link connections. Wherein, the auxiliary information is reported based on an event trigger, or the auxiliary information is reported periodically.

Here, the auxiliary information includes at least one of quality of service QoS, wireless link failure information, channel quality information, and reference signal quality information.

b. Access the AS layer to determine the release of the unicast link with UE_2.

It should be noted that the connection release request message includes at least one of the following information:

Source ID (UE_1),

Destination ID (UE_2),

Cause value to indicate the reason for the connection release of the unicast link, and

Send and / or receive wireless resources for discovery signals.

Here, the reason for the connection release of the unicast link includes at least one of the following:

(1) The packet or data flow QoS requirements of UE_1 and UE_2 cannot be met

(2) Wireless link failure between UE_1 and UE_2

(3) The channel quality between UE_1 and UE_2 is poor (below a given threshold)

(4) poor reference signal quality between UE_1 and UE_2

Of course, in addition to the reasons mentioned above, other unicast link connection release reasons can also be included.

S2: UE_2 receives the unicast link connection release request message sent by UE_1, and releases the unicast link connection according to the connection release request message.

Among them, after UE_2 releases the unicast link connection, the AS layer of UE_2 determines to trigger sending or receiving a discovery signal; or the AS layer of UE_2 notifies the upper layer and the upper layer determines and notifies the AS layer to trigger sending or receiving a discovery signal.

S3: UE_1 receives the indication of connection release completion sent by UE_2.

Here, the indication information is used to indicate that the unicast link connection of UE_2 is successfully released.

Specifically, the indication of completion of the connection release includes at least one of the following:

UE_2 physical layer feedback information;

RLC layer feedback information for UE_2; and

UE_2 unicast link release complete message.

Here, further, after UE_1 receives the indication of connection release completion sent by UE_2, that is, after UE_1 confirms that after the unicast link connection of UE_2 is successfully released, the AS layer of UE_1 determines to trigger sending or receiving a discovery signal; or , The AS layer of UE_1 notifies the upper layer, and the upper layer determines and notifies the AS layer to trigger sending or receiving a discovery signal.

The above embodiments have introduced the method for releasing the link of the side link in different scenarios in detail. In the following, the corresponding terminal will be further described in conjunction with the accompanying drawings.

As shown in FIG. 4, the terminal 400 according to the embodiment of the present disclosure can implement the details shown in the embodiment shown in FIG. 1 and FIG. 3 and the details of the link release method of the middle and side links, and achieve the same effect. 400 specifically refers to the first terminal, and specifically includes the following functional modules:

A first receiving module 401, configured to receive a connection release request message for a unicast link of a side link sent by a second terminal;

A link release module 402 is configured to release the unicast link according to the connection release request message.

Source identification,

Purpose identification,

Radio resources for transmitting discovery signals.

Optionally, the reason for the connection release includes at least one of the following:

The QoS of the data packet or data stream service transmitted over the unicast link does not meet a preset threshold condition,

A wireless link failure occurs on a unicast link with the second terminal,

The channel quality of the unicast link is lower than a second threshold, and

Optionally, the QoS includes at least one of service priority, delay, reliability, communication distance, payload size, transmission rate, and data rate.

The terminal 400 in this embodiment may further include:

A feedback module, configured to feed back, to the second terminal, indication of connection release completion after the unicast link is released according to the connection release request message, and the indication information is used to instruct the first terminal to release the unicast chain road.

Optionally, the indication information of completion of connection release includes at least one of the following:

Physical layer feedback information,

Radio Link Control RLC layer feedback information, and

Unicast link release complete message.

The terminal 400 in this embodiment may further include:

The notification module is configured to, after releasing the unicast link according to the connection release request message, notify the upper layer of the access AS layer of the terminal to release the unicast link.

The terminal 400 in this embodiment may further include:

A first transmission module is configured to access the AS layer to send or receive a discovery signal after releasing the unicast link according to the connection release request message.

Alternatively, a second transmission module is configured to send or receive the discovery signal under an upper layer notification after the unicast link is released according to the connection release request message, and the upper layer notification is the upper layer Sent after the AS layer notifies the release of the unicast link.

The terminal 400 in this embodiment may further include:

A second sending module, configured to send a connection establishment request message of the unicast link to the second terminal before receiving the connection release request message of the unicast link of the side link sent by the second terminal to establish a connection with the unicast link; A unicast link between the second terminals;

Alternatively, the second receiving module is configured to receive the connection establishment request message of the unicast link sent by the second terminal before receiving the connection release request message of the unicast link of the side link sent by the second terminal, To establish a unicast link with the second terminal.

The terminal in the embodiment of the present disclosure receives a connection release request message for a unicast link of a side link sent by a second terminal through a first receiving module, and the link release module releases the unicast chain according to the connection release request message. It can effectively support the timely release of the unicast link connection established by the terminal on the side link, which is conducive to improving the wireless resource utilization and link management efficiency, and can effectively support the advanced V2X unicast service.

As shown in FIG. 5, the terminal 500 according to the embodiment of the present disclosure can implement the details shown in the embodiment shown in FIG. 2 and FIG. 3 and the details of the link release method of the middle and side links, and achieve the same effect. 500 specifically refers to the second terminal, and specifically includes the following functional modules:

A first sending module 501 is configured to send a connection release request message of a unicast link of a side link to a first terminal.

Optionally, the first sending module 501 may include:

The sending unit is configured to send a connection release request message of a unicast link of a side link to the first terminal when a preset condition is satisfied.

Optionally, the preset condition includes at least one of the following:

Optionally, the release request is determined by the upper layer according to the auxiliary information reported by the AS layer; wherein the auxiliary information is reported based on an event trigger, or the auxiliary information is reported periodically.

Source identification,

Purpose identification,

Radio resources for transmitting discovery signals.

The QoS of a data packet or a data stream transmitted through the unicast link does not satisfy a preset threshold condition,

A wireless link failure occurs on a unicast link with the first terminal,

The channel quality of the unicast link is lower than a second threshold, and

The terminal 500 in the embodiment of the present disclosure may further include:

A third receiving module, configured to, after sending a connection release request message for a unicast link of a side link to the first terminal, receive indication information of connection release completion sent by the first terminal, where the indication information is used to indicate The first terminal releases the unicast link.

Physical layer feedback information,

Radio Link Control RLC layer feedback information, and

Unicast link release complete message.

A third transmission module, configured to access the AS layer to send or receive a discovery signal;

Alternatively, a fourth transmission module is configured for the AS layer to send or receive the discovery signal under an upper layer notification, and the upper layer notification is sent by the upper layer after the AS layer notifies the release of the unicast link.

A fourth receiving module, configured to receive the connection establishment request message of the unicast link sent by the first terminal before sending the connection release request message of the unicast link of the side link to the first terminal to establish a connection with A unicast link between the first terminals;

Or, a third sending module is configured to send the connection establishment request message of the unicast link to the first terminal before sending the connection release request message of the unicast link of the side link to the first terminal to establish A unicast link with the first terminal.

The terminal in the embodiment of the present disclosure sends the connection release request message of the unicast link of the side link to the first terminal through the first sending module, which can effectively support the timelyness of the unicast link connection established by the terminal on the side link. The release is conducive to improving wireless resource utilization and link management efficiency, and can effectively support advanced V2X unicast services.

It should be noted that it should be understood that the division of each module of the above terminal is only a division of logical functions. In actual implementation, it may be fully or partially integrated into a physical entity, or it may be physically separated. And these modules can all be implemented in the form of software called by processing elements; they can also be all implemented in hardware; some modules can be implemented in the form of software called by processing elements, and some modules can be implemented in hardware. For example, the determination module may be a separately established processing element, or it may be integrated and implemented in a certain chip of the above device. In addition, it may also be stored in the form of a program code in the memory of the above device, and a certain processing element of the above device may be used. Invoke and execute the functions of the above identified modules. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together, or they can be implemented independently. The processing element described herein may be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (ASIC), or one or more microprocessors (digital signal processor (DSP), or one or more Field Programmable Gate Array (FPGA). As another example, when one of the above modules is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can call program code. As another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).

In order to better achieve the foregoing objective, further, FIG. 6 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present disclosure. The terminal 600 includes, but is not limited to, a radio frequency unit 601, a network module 602, an audio output unit 603, The input unit 604, the sensor 605, the display unit 606, the user input unit 607, the interface unit 608, the memory 609, the processor 610, and the power supply 611 and other components. Those skilled in the art can understand that the terminal structure shown in FIG. 6 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or some components may be combined, or different components may be arranged. In the embodiment of the present disclosure, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a car terminal, a wearable device, a pedometer, and the like.

The radio frequency unit 601 is configured to receive a connection release request message for a unicast link of a side link sent by a second terminal; and the processor 610 is configured to release the unicast link according to the connection release request message.

Alternatively, the radio frequency unit 601 is configured to send a connection release request message of a unicast link of a side link to the first terminal.

The terminal in the embodiment of the present disclosure can effectively support the timely release of the unicast link connection established by the terminal on the side link, which is beneficial to improve the wireless resource utilization rate and link management efficiency, and support different service requirements for link transmission. For example, to ensure effective support for advanced V2X unicast services.

It should be understood that, in the embodiment of the present disclosure, the radio frequency unit 601 may be used to receive and send signals during the transmission and reception of information or during a call. Specifically, the downlink data from the base station is received and processed by the processor 610; The uplink data is sent to the base station. Generally, the radio frequency unit 601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 601 can also communicate with a network and other devices through a wireless communication system.

The terminal provides users with wireless broadband Internet access through the network module 602, such as helping users to send and receive email, browse web pages, and access streaming media.

The audio output unit 603 may convert audio data received by the radio frequency unit 601 or the network module 602 or stored in the memory 609 into audio signals and output them as sound. Also, the audio output unit 603 may also provide audio output (for example, a call signal receiving sound, a message receiving sound, etc.) related to a specific function performed by the terminal 600. The audio output unit 603 includes a speaker, a buzzer, a receiver, and the like.

The input unit 604 is used for receiving audio or video signals. The input unit 604 may include a graphics processing unit (GPU) 6041 and a microphone 6042. The graphics processor 6041 pairs images of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. Data is processed. The processed image frames may be displayed on a display unit 606. The image frames processed by the graphics processor 6041 may be stored in the memory 609 (or other storage medium) or transmitted via the radio frequency unit 601 or the network module 602. The microphone 6042 can receive sound, and can process such sound into audio data. The processed audio data can be converted into a format that can be transmitted to a mobile communication base station via the radio frequency unit 601 in the case of a telephone call mode.

The terminal 600 further includes at least one sensor 605, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 6061 according to the brightness of the ambient light, and the proximity sensor can close the display panel 6061 and / Or backlight. As a type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in various directions (usually three axes). It can detect the magnitude and direction of gravity when it is stationary, and can be used to identify the attitude of the terminal (such as horizontal and vertical screen switching, related games, Magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tap), etc .; sensor 605 can also include fingerprint sensor, pressure sensor, iris sensor, molecular sensor, gyroscope, barometer, hygrometer, thermometer, infrared The sensors and the like are not repeated here.

The display unit 606 is configured to display information input by the user or information provided to the user. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

The user input unit 607 may be used to receive inputted numeric or character information, and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 607 includes a touch panel 6071 and other input devices 6072. Touch panel 6071, also known as touch screen, can collect user's touch operations on or near it (such as the user using a finger, stylus, etc. any suitable object or accessory on touch panel 6071 or near touch panel 6071 operating). The touch panel 6071 may include a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch position, and detects the signal caused by the touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into contact coordinates, and sends it To the processor 610, receive the command sent by the processor 610 and execute it. In addition, various types such as resistive, capacitive, infrared, and surface acoustic wave can be used to implement the touch panel 6071. In addition to the touch panel 6071, the user input unit 607 may further include other input devices 6072. Specifically, other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, and details are not described herein again.

Further, the touch panel 6071 may be overlaid on the display panel 6061. When the touch panel 6071 detects a touch operation on or near the touch panel 6071, the touch panel 6071 transmits the touch operation to the processor 610 to determine the type of the touch event. The type of event provides corresponding visual output on the display panel 6061. Although in FIG. 6, the touch panel 6071 and the display panel 6061 are implemented as two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 6071 and the display panel 6061 can be integrated and Implement the input and output functions of the terminal, which are not limited here.

The interface unit 608 is an interface through which an external device is connected to the terminal 600. For example, the external device may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, and audio input / output (I / O) port, video I / O port, headphone port, and more. The interface unit 608 may be used to receive an input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 600 or may be used between the terminal 600 and an external device. Transfer data.

The memory 609 can be used to store software programs and various data. The memory 609 may mainly include a storage program area and a storage data area, where the storage program area may store an operating system, at least one application required by a function (such as a sound playback function, an image playback function, etc.), and the like; Data (such as audio data, phone book, etc.) created by the use of mobile phones. In addition, the memory 609 may include a high-speed random access memory, and may further include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

The processor 610 is a control center of the terminal, and uses various interfaces and lines to connect various parts of the entire terminal. The processor 610 runs or executes software programs and / or modules stored in the memory 609 and calls data stored in the memory 609 to execute Various functions and processing data of the terminal, so as to monitor the terminal as a whole. The processor 610 may include one or more processing units; optionally, the processor 610 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and an application program, etc. The tuning processor mainly handles wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 610.

The terminal 600 may further include a power source 611 (such as a battery) for supplying power to various components. Alternatively, the power source 611 may be logically connected to the processor 610 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system And other functions.

In addition, the terminal 600 includes some functional modules that are not shown, and details are not described herein again.

Optionally, an embodiment of the present disclosure further provides a terminal, including a processor 610, a memory 609, and a computer program stored on the memory 609 and executable on the processor 610. When the computer program is executed by the processor 610, The processes of the embodiments of the method for releasing a link of a side link are implemented, and the same technical effects can be achieved. To avoid repetition, details are not described herein again. The terminal may be a wireless terminal or a wired terminal. The wireless terminal may be a device that provides voice and / or other business data connectivity to the user, a handheld device with a wireless connection function, or other processing equipment connected to a wireless modem. . A wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal For example, it can be a portable, compact, handheld, computer-built or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistant (Personal Digital Assistant, PDA) and other devices. A wireless terminal can also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a mobile station, a remote station, a remote terminal, The access terminal (Access terminal), user terminal (User terminal), user agent (User agent), user equipment (User Device or User Equipment) are not limited here.

An embodiment of the present disclosure further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements each process of the above-mentioned side link link release method embodiment, and Can achieve the same technical effects, in order to avoid repetition, will not repeat them here. The computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

Those of ordinary skill in the art may realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation should not be considered outside the scope of the present disclosure.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and are not repeated here.

In the embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially a part that contributes to related technologies or a part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several The instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in various embodiments of the present disclosure. The foregoing storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

In addition, it should be pointed out that, in the apparatus and method of the present disclosure, it is obvious that each component or each step can be disassembled and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present disclosure. In addition, the steps for performing the series of processes described above can be performed naturally in chronological order in accordance with the described order, but need not necessarily be performed in chronological order, and certain steps can be performed in parallel or independently of each other. For a person of ordinary skill in the art, it is able to understand all or any steps or components of the methods and devices of the present disclosure, and may be implemented in hardware, firmware in any computing device (including a processor, a storage medium, etc.) or a network of computing devices. , Software, or a combination thereof, which can be achieved by a person of ordinary skill in the art using their basic programming skills after reading the description of the present disclosure.

Therefore, the purpose of the present disclosure can also be achieved by running a program or a group of programs on any computing device. The computing device may be a well-known general-purpose device. Therefore, the object of the present disclosure can also be achieved only by providing a program product including a program code that implements the method or device. That is, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure. Obviously, the storage medium may be any known storage medium or any storage medium developed in the future. It should also be noted that, in the apparatus and method of the present disclosure, it is obvious that each component or each step can be disassembled and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present disclosure. In addition, the steps for performing the above-mentioned series of processes can be naturally performed in chronological order in accordance with the described order, but need not necessarily be performed in chronological order. Certain steps can be performed in parallel or independently of each other.

The above is an optional implementation of the present disclosure. It should be noted that for ordinary people in the technical field, several improvements and retouches can be made without departing from the principles described in the present disclosure. These improvements and retouches also Within the scope of this disclosure.

Claims

A link release method for a side link, which is applied to a first terminal and includes:

Receiving a connection release request message for a unicast link of a side link sent by a second terminal;

Release the unicast link according to the connection release request message.
The method of claim 1, wherein the connection release request message includes at least one of the following information:

Source identification,

Purpose identification,

A cause value indicating the reason for the connection release of the unicast link, and

Radio resources for transmitting discovery signals.
The method for releasing a link of a side link according to claim 2, wherein the cause of the connection release includes at least one of the following:

The QoS of the data packet or data stream service transmitted over the unicast link does not meet a preset threshold condition,

A wireless link failure occurs on a unicast link with the second terminal,

The channel quality of the unicast link is lower than a second threshold, and

The reference signal quality of the unicast link is lower than a third threshold.
The method for releasing a link of a side link according to claim 3, wherein the QoS comprises at least one of a service priority, a delay, a reliability, a communication distance, a payload size, a transmission rate, and a data rate.
The method for releasing a link of a side link according to claim 1, wherein after the step of releasing the unicast link according to the connection release request message, further comprising:

Feedback to the second terminal about the completion information of connection release, and the indication information is used to instruct the first terminal to release the unicast link.
The method for releasing a link of a side link according to claim 5, wherein the indication information for completion of connection release comprises at least one of the following:

Physical layer feedback information,

Radio Link Control RLC layer feedback information, and

Unicast link release complete message.
The method for releasing a link of a side link according to claim 1, wherein after the step of releasing the unicast link according to the connection release request message, further comprising:

The access AS layer informs the upper layer of the release of the unicast link.
The method for releasing a link of a side link according to claim 1, wherein after the step of releasing the unicast link according to the connection release request message, further comprising:

Access the AS layer to send or receive discovery signals;

or,

The AS layer sends or receives the discovery signal under an upper layer notification, and the upper layer notification is sent by the upper layer after the AS layer notifies the release of the unicast link.
The method for releasing a link of a side link according to claim 1, wherein before the step of receiving a connection release request message for a unicast link of the side link sent by the second terminal, further comprising:

Sending a connection establishment request message of the unicast link to the second terminal to establish a unicast link with the second terminal;

or,

Receiving a connection establishment request message for the unicast link sent by the second terminal to establish a unicast link with the second terminal.
A link release method for a side link, which is applied to a second terminal and includes:

A connection release request message for a unicast link of a side link is sent to the first terminal.
The method for releasing a link of a side link according to claim 10, wherein the step of sending a connection release request message for the unicast link of the side link to the first terminal comprises:

When a preset condition is satisfied, a connection release request message for a unicast link of a side link is sent to the first terminal.
The method for releasing a link of a side link according to claim 11, wherein the preset condition comprises at least one of the following:

Receiving a release request for instructing to release a unicast link between the first terminal and the release request, which is sent by an upper layer;

The access AS layer determines to release a unicast link with the first terminal.
The method for releasing a link of a side link according to claim 12, wherein the release request is determined by the upper layer according to auxiliary information reported by the AS layer; wherein the auxiliary information is reported based on an event trigger , Or the auxiliary information is reported periodically.
The method for releasing a link of a side link according to claim 13, wherein the auxiliary information includes at least one of quality of service Qos, wireless link failure information, channel quality information, and reference signal quality information.
The method of claim 10, wherein the connection release request message includes at least one of the following information:

Source identification,

Purpose identification,

A cause value indicating the reason for the connection release of the unicast link, and

Radio resources for transmitting discovery signals.
The method for releasing a link of a side link according to claim 15, wherein the cause of the connection release includes at least one of the following:

A QoS of a data packet or a data stream transmitted through the unicast link does not satisfy a preset threshold condition, and a wireless link failure occurs on the unicast link with the first terminal,

The channel quality of the unicast link is lower than a second threshold, and

The reference signal quality of the unicast link is lower than a third threshold.
The method for releasing a link of a side link according to claim 14 or 16, wherein the QoS comprises at least one of a service priority, a delay, a reliability, a communication distance, a payload size, a transmission rate, and a data rate. item.
The method for releasing a link of a side link according to claim 10, wherein after the step of sending a connection release request message for a unicast link of the side link to the first terminal, further comprising:

Receiving indication information for connection release completion sent by the first terminal, where the indication information is used to instruct the first terminal to release the unicast link.
The method for releasing a link of a side link according to claim 18, wherein the indication information of completion of connection release comprises at least one of the following:

Physical layer feedback information,

Radio Link Control RLC layer feedback information, and

Unicast link release complete message.
The method for releasing a link of a side link according to claim 18, wherein after the step of receiving the connection release completion indication information sent by the first terminal, further comprising:

Access the AS layer to send or receive discovery signals;

or,

The AS layer sends or receives the discovery signal under an upper layer notification, and the upper layer notification is sent by the upper layer after the AS layer notifies the release of the unicast link.
The method for releasing a link of a side link according to claim 10, wherein before the step of sending a connection release request message for a unicast link of the side link to the first terminal, further comprising:

Receiving a connection establishment request message for the unicast link sent by the first terminal to establish a unicast link with the first terminal;

or,

Sending a connection establishment request message of the unicast link to the first terminal to establish a unicast link with the first terminal.
A terminal including:

A first receiving module, configured to receive a connection release request message for a unicast link of a side link sent by a second terminal;

A link release module is configured to release the unicast link according to the connection release request message.
The terminal according to claim 22, wherein the connection release request message includes at least one of the following information:

Source identification,

Purpose identification,

A cause value indicating the reason for the connection release of the unicast link, and

Radio resources for transmitting discovery signals.
The terminal according to claim 23, wherein the connection release cause includes at least one of the following:

The QoS of the data packet or data stream service transmitted over the unicast link does not meet a preset threshold condition,

A wireless link failure occurs on a unicast link with the second terminal,

The channel quality of the unicast link is lower than a second threshold, and

The reference signal quality of the unicast link is lower than a third threshold.
The terminal according to claim 24, wherein the QoS comprises at least one of a service priority, a delay, a reliability, a communication distance, a payload size, a transmission rate, and a data rate.
The terminal according to claim 22, further comprising:

A feedback module is configured to feed back to the second terminal indication information about connection release completion, where the indication information is used to instruct the first terminal to release a unicast link.
The terminal according to claim 26, wherein the indication information of completion of connection release comprises at least one of the following:

Physical layer feedback information,

Radio Link Control RLC layer feedback information, and

Unicast link release complete message.
The terminal according to claim 22, further comprising:

A notification module, configured to access the AS layer to notify the unicast link of the release of the unicast link.
The terminal according to claim 22, further comprising:

A first transmission module, configured to access the AS layer to send or receive a discovery signal;

Alternatively, a second transmission module is used for the AS layer to send or receive the discovery signal under an upper layer notification, and the upper layer notification is sent by the upper layer after the AS layer notifies the release of the unicast link.
The terminal according to claim 22, further comprising:

A second sending module, configured to send a connection establishment request message of the unicast link to the second terminal to establish a unicast link with the second terminal;

Alternatively, a second receiving module is configured to receive a connection establishment request message for the unicast link sent by the second terminal to establish a unicast link with the second terminal.
A terminal including:

A first sending module is configured to send a connection release request message of a unicast link of a side link to a first terminal.
The terminal according to claim 31, wherein the first sending module comprises:

The sending unit is configured to send a connection release request message of a unicast link of a side link to the first terminal when a preset condition is satisfied.
The terminal according to claim 32, wherein the preset condition comprises at least one of the following:

Receiving a release request for instructing to release a unicast link between the first terminal and the release request, which is sent by an upper layer;

The access AS layer determines to release a unicast link with the first terminal.
The terminal according to claim 33, wherein the release request is determined by the upper layer based on auxiliary information reported by the AS layer; wherein the auxiliary information is reported based on an event trigger, or the auxiliary information is Reported periodically.
The terminal according to claim 34, wherein the auxiliary information includes at least one of quality of service information (QoS), wireless link failure information, channel quality information, and reference signal quality information.
The terminal according to claim 31, wherein the connection release request message includes at least one of the following information:

Source identification,

Purpose identification,

A cause value indicating the reason for the connection release of the unicast link, and

Radio resources for transmitting discovery signals.
The terminal according to claim 36, wherein the connection release cause includes at least one of the following:

The QoS of a data packet or a data stream transmitted through the unicast link does not satisfy a preset threshold condition,

A wireless link failure occurs on a unicast link with the first terminal,

The channel quality of the unicast link is lower than a second threshold, and

The reference signal quality of the unicast link is lower than a third threshold.
The terminal according to claim 35 or 37, wherein the QoS comprises at least one of a service priority, a delay, a reliability, a communication distance, a payload size, a transmission rate, and a data rate.
The terminal according to claim 31, further comprising:

A third receiving module is configured to receive indication information of connection release completion sent by the first terminal, where the indication information is used to instruct the first terminal to release the unicast link.
The terminal according to claim 39, wherein the indication information of completion of connection release comprises at least one of the following:

Physical layer feedback information,

Radio Link Control RLC layer feedback information, and

Unicast link release complete message.
The terminal according to claim 39, further comprising:

A third transmission module, configured to access the AS layer to send or receive a discovery signal;

Alternatively, a fourth transmission module is configured for the AS layer to send or receive the discovery signal under an upper layer notification, and the upper layer notification is sent by the upper layer after the AS layer notifies the release of the unicast link.
The terminal according to claim 31, further comprising:

A fourth receiving module, configured to receive a connection establishment request message for the unicast link sent by the first terminal to establish a unicast link with the first terminal;

Alternatively, a third sending module is configured to send a connection establishment request message of the unicast link to the first terminal to establish a unicast link with the first terminal.
A terminal, wherein the terminal includes a processor, a memory, and a computer program stored on the memory and running on the processor, and the computer program is implemented by the processor to implement the claims as claimed in claims 1 to Steps of any of 9 or a method of implementing a link release method of a side link according to any of 10 to 21.
A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements any one of claims 1 to 9 or implements any of 10 to 21 Steps of a method for releasing a link of a side link.