CN110944306A

CN110944306A - Link release method of sidelink and terminal

Info

Publication number: CN110944306A
Application number: CN201811116603.2A
Authority: CN
Inventors: 郑倩; 杨晓东
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-09-25
Filing date: 2018-09-25
Publication date: 2020-03-31
Also published as: WO2020063263A1

Abstract

The invention discloses a link release method and a terminal of a side link, wherein the method comprises the following steps: and receiving a connection release request message of a unicast link of the side link sent by the second terminal, and releasing the unicast link according to the connection release request message. The invention can effectively support the timely release of the established unicast link connection of the terminal on the sidelink by receiving the connection release request message of the unicast link of the sidelink sent by the second terminal and releasing the unicast link according to the connection release request message, thereby being beneficial to improving the utilization rate of wireless resources and the management efficiency of the link.

Description

Link release method of sidelink and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a link release method for a sidelink and a terminal.

Background

In order to meet different application scenarios, the mobile communication system may support not only Uplink (Uplink) transmission and Downlink (Downlink) transmission, but also Sidelink (Sidelink), or called Sidelink, or Sidelink-based transmission, for performing direct transmission between terminals without passing through a network device.

The sidelink transmission may be used to support public safety services, such as emergency communication in fire or earthquake disaster, or basic safety communication in the internet of vehicles (V2X). However, in the prior art, the sidelink is based on broadcast mechanism communication, the sending end terminal cannot determine the receiving result of the receiving end terminal, and in order to improve transmission reliability, the sending end terminal always sends data to the receiving end terminal according to the maximum retransmission times, so that the utilization rate of the wireless resources of the system is low, and the quality requirements of the advanced V2X service, such as the advanced V2X service requiring low time delay, high reliability and large data volume, such as automatic driving, sensor extension, and the like, cannot be met.

Disclosure of Invention

The embodiment of the invention provides a link release method and a terminal of a sidelink, which aim to solve the problems of low radio resource utilization rate and low link management efficiency of the sidelink in the prior art.

In a first aspect, an embodiment of the present invention provides a link releasing method for a sidelink, which is applied to a first terminal, and includes:

receiving a connection release request message of a unicast link of a sidelink, which is sent by a second terminal;

and releasing the unicast link according to the connection release request message.

In a second aspect, an embodiment of the present invention provides a link releasing method for a sidelink, which is applied to a second terminal, and includes:

and sending a connection release request message of a unicast link of the side link to the first terminal.

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

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

and the link releasing module is used for releasing the unicast link according to the connection releasing request message.

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

a first sending module, configured to send a connection release request message of a unicast link of the sidelink to the first terminal.

In a fifth aspect, an embodiment of the present invention 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, when executed by the processor, implements the steps of the link release method for a sidelink as described above.

In a sixth aspect, the embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when being executed by a processor, the computer program implements the steps of the link release method for a sidelink as described above.

In this way, in the embodiment of the present invention, by receiving the connection release request message of the unicast link of the sidelink sent by the second terminal, and releasing the unicast link according to the connection release request message, the unicast link connection established on the sidelink by the terminal can be effectively released in time, which is beneficial to improving the utilization rate of wireless resources and the link management efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a flowchart illustrating a link release method for a sidelink according to an embodiment of the present invention;

fig. 2 is a second flowchart of a link releasing method of a sidelink according to an embodiment of the present invention;

fig. 3 is a third schematic flow chart of a link release method for a sidelink according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

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

fig. 6 is a block diagram of a terminal according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects.

Fig. 1 is a schematic flowchart of a link releasing method for a sidelink according to an embodiment of the present invention, where the method is applied to a first terminal.

Step 101, receiving a connection release request message of a unicast link of a sidelink sent by a second terminal;

here, before the second terminal sends the connection release request message of the unicast link of the sidelink, the connection of the point-to-point unicast link between the first terminal and the second terminal is established, that is, the first terminal and the second terminal are in a connected state.

Here, the sidelink may include: NR (New Radio, New air interface) Sidelink.

And 102, releasing the unicast link according to the connection release request message.

The method for releasing the side link connection in the embodiment of the invention can effectively support the timely release of the established unicast link connection of the terminal on the side link by receiving the connection release request message of the unicast link of the side link sent by the second terminal and releasing the unicast link according to the connection release request message, thereby being beneficial to improving the utilization rate of wireless resources and the management efficiency of the link and ensuring the effective support of advanced V2X unicast service.

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

the identity of the source is identified,

the identification of the purpose is carried out,

a cause value for indicating a reason for connection release of the unicast link, an

A radio resource on which a discovery signal is transmitted.

Wherein the connection release cause comprises at least one of:

the quality of service QoS of the data packets or data streams transmitted over the unicast link does not satisfy a preset threshold condition,

a radio link failure occurs with the unicast link between the second terminal,

the channel quality of the unicast link is below a second threshold, an

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

Here, preferably, the Quality of Service (QoS) includes: at least one of Priority (Priority), Latency (ms), Reliability (Reliability%), communication distance (meters), payload size (bytes), Transmission rate (message/sec), and Data rate (Mbps).

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

And the channel quality of the unicast link is lower than a 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 a preferred implementation manner, after step 102, the method may further include the following steps:

and feeding back indication information of connection release completion to the second terminal, wherein the indication information is used for indicating the first terminal to release the unicast link.

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

the physical layer feeds back the information that,

radio link control, RLC, layer feedback information, and

a unicast link release complete message.

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

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

The unicast link release completion message is used for responding to the unicast link connection establishment release message and indicates that the unicast link release is successful.

Based on the embodiment shown in fig. 1, as another preferred implementation manner, after step 102, the method may further include the following steps:

and the access AS layer informs the unicast link release to the upper layer.

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

Based on the embodiment shown in fig. 1, as a further preferred implementation manner, after step 102, the method may further include the following steps:

accessing an AS layer to send or receive a discovery signal;

alternatively, the first and second electrodes may be,

the AS layer sends or receives the discovery signal under an upper layer notification, and the upper layer notification is sent after the AS layer notifies the unicast link to be released.

Here, the AS layer of the first terminal sends the discovery signal directly (by itself) or indirectly (by upper layer notification), and the purpose of the discovery signal is to actively inform other surrounding terminals that the terminals are currently in an idle state, and to establish a unicast link connection with any one of the other terminals.

The AS layer of the first terminal receives the discovery signal in a direct (self) or indirect (notification of an upper layer) manner, and can know which terminals exist around the first terminal and can establish unicast link connection with the first terminal through the received discovery signal.

It should be noted that the upper layer includes an AS layer and above, such AS a NAS layer and/or an application layer.

Based on the embodiment shown in fig. 1, as a further preferred 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 so as to establish the unicast link with the second terminal;

alternatively, the first and second electrodes may be,

and receiving a connection establishment request message of the unicast link sent by the second terminal so as to establish the unicast link with the second terminal.

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

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

When the first terminal is the connection establishment initiator of the unicast link, the source identifier in the connection release request message is the source identifier (source ID) of the second terminal, and the destination identifier is the destination identifier (destinationID) of the first terminal.

According to the link release method of the sidelink, the connection release request message of the unicast link of the sidelink, which is sent by the second terminal, is received, the unicast link is released according to the connection release request message, the timely release of the established unicast link connection of the terminal on the sidelink can be effectively supported, the utilization rate of wireless resources and the link management efficiency are improved, and the effective support of the advanced V2X unicast service can be ensured.

Fig. 2 is a schematic flowchart of a link releasing method for a sidelink according to an embodiment of the present invention, where the method is applied to a second terminal.

Step 201, sending a connection release request message of a unicast link of the side link to the first terminal.

Here, before the second terminal sends the connection release request message of the unicast link of the sidelink to the first terminal, the connection of the point-to-point unicast link between the first terminal and the second terminal is established, that is, the first terminal and the second terminal are in a connected state.

Here, the sidelink may include: NR Sidelink.

The link releasing method of the sidelink of the embodiment of the invention can release the unicast link according to the connection releasing request message by sending the connection releasing request message of the unicast link of the sidelink to the first terminal, thereby effectively supporting the timely release of the established unicast link connection of the terminal on the sidelink, being beneficial to improving the utilization rate of wireless resources and the link management efficiency and ensuring the effective support of advanced V2X unicast service.

Based on the embodiment shown in fig. 2, as a preferred implementation manner of the present invention, step 201 may specifically include the following steps:

and sending a connection release request message of a unicast link of the side link to the first terminal when a preset condition is met.

Preferably, the preset condition includes at least one of:

receiving a release request for indicating release of a unicast link between the first terminal and the first terminal, wherein the release request 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 event triggering, or the auxiliary information is reported periodically.

Here, the specific implementation is as follows:

and the AS layer reports the auxiliary information to the upper layer, and the upper layer requests the AS layer to release the unicast link connection established with the first terminal or indicates the AS layer to release all established unicast link connections after receiving the auxiliary information.

Preferably, the auxiliary information includes: at least one of quality of service, QoS, radio link failure information, channel quality information, and reference signal quality information.

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

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

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

Based on the embodiment shown in fig. 2, it is preferable that the connection release request message includes at least one of the following information:

the identity of the source is identified,

the identification of the purpose is carried out,

A radio resource on which a discovery signal is transmitted.

Wherein the connection release cause comprises at least one of:

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

a radio link failure occurs with a unicast link between the first terminal,

the channel quality of the unicast link is below a second threshold, an

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

Here, preferably, the QoS includes: at least one of traffic priority, latency, reliability, communication distance, payload size, transmission rate, and data rate.

Based on the embodiment shown in fig. 2, as another preferred implementation manner, after step 201, the method may further include the following steps:

and receiving indication information of connection release completion sent by the first terminal, wherein the indication information is used for indicating the first terminal to release the unicast link.

the physical layer feeds back the information that,

radio link control, RLC, layer feedback information, and

a unicast link release complete message.

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

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

accessing an AS layer to send or receive a discovery signal;

alternatively, the first and second electrodes may be,

Here, the AS layer of the second terminal sends a discovery (discovery) signal directly (by itself) or indirectly (by upper layer notification), and the purpose of the discovery (discovery) signal is to actively inform other terminals around that the terminal is currently in an idle state, and to establish a unicast link connection with any one of the other terminals.

The AS layer of the second terminal receives the discovery signal in a direct (self) or indirect (notification of an upper layer) manner, and can learn, through the received discovery signal, which terminals exist around and can establish unicast link connection with the terminals.

The upper layer includes an AS layer or more. Namely the NAS layer and/or the application layer.

Based on the embodiment shown in fig. 2, as a further preferred implementation manner, before step 201, the method may further include the following steps:

receiving a connection establishment request message of the unicast link sent by the first terminal so as to establish the unicast link with the first terminal;

alternatively, the first and second electrodes may be,

and sending a connection establishment request message of the unicast link to the first terminal so as to establish the unicast link with the first terminal.

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

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

And under the condition that the second terminal is the connection establishment initiated party of the unicast link, the source identifier in the connection release request message is the source identifier source ID of the first terminal, and the destination identifier is the destination identifier destination ID of the second terminal.

The following takes fig. 3 as an example to specifically describe a specific implementation process of the link releasing method of the sidelink.

Note that, in fig. 3, UE _1 represents a first terminal, and UE _2 represents a second terminal. The UE _1 is an initiator for establishing unicast link connection with the UE _2, or is an initiator for establishing unicast link connection with the UE _ 2.

S1, when the preset condition is satisfied, UE _1 triggers to send a connection Release Request (Unicast Release Request) message of the Unicast link to UE _2, namely, the Unicast link Release Request message shown in ① in FIG. 3.

Wherein the preset condition comprises at least one of the following:

a. a release request is received indicating release of the unicast link with UE _2, which is sent by the upper layer.

Here, the upper layer includes AS layer or more. Namely the NAS layer and/or the application layer.

The specific implementation is as follows:

and the AS layer reports the auxiliary information to an upper layer, and the upper layer requests the AS layer to release the unicast link connection established with the UE _2 or indicates the AS layer to release all established unicast link connections after receiving the auxiliary information. Wherein the auxiliary information is reported based on event triggering, or the auxiliary information is reported periodically.

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

b. The access AS layer determines to release the unicast link with UE _ 2.

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

the source identification source ID (UE _1),

a destination identification ID (UE _2),

a Cause value Cause for indicating a reason for connection release of the unicast link, an

And transmitting and/or receiving a wireless resource for discovering discovery signal.

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

(1) the QoS requirements of the data packets or data streams of UE _1 and UE _2 cannot be met

(2) Radio link failure occurs between UE _1 and UE _2

(3) The channel quality between UE _1 and UE _2 is poor (below a given threshold)

(4) The quality of the reference signal between UE _1 and UE _2 is poor

Of course, in addition to the reasons mentioned above, connection release reasons for other unicast links may also be included.

S2: and the UE _2 receives the connection release request message of the unicast link sent by the UE _1 and releases the connection of the unicast link according to the connection release request message.

After UE _2 releases the unicast link connection, the AS layer of UE _2 determines to trigger sending or receiving of a discovery signal; or the AS layer of the UE _2 informs the upper layer, and the AS layer determines and informs the upper layer to trigger sending or receiving of the discovery signal.

S3: and the UE _1 receives the indication information of the connection release completion sent by the UE _ 2.

Here, the indication information is used to indicate that the unicast link connection of UE _2 is released successfully.

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

physical layer feedback information of UE _ 2;

RLC layer feedback information of UE _ 2; and

unicast link release complete message for UE _ 2.

Here, further, after UE _1 receives the indication information of connection release completion sent by UE _2, that is, after UE _1 confirms that 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 the UE _1 informs an upper layer, and the AS layer determines and informs the upper layer to trigger sending or receiving of the discovery signal.

The above embodiments respectively describe in detail the link releasing methods of the sidelink in different scenarios, and the following embodiments further describe the corresponding terminals with reference to the accompanying drawings.

As shown in fig. 4, the terminal 400 according to the embodiment of the present invention can implement the details of the link releasing methods of the embodiments and the intermediate link shown in fig. 1 and fig. 3, and achieve the same effect, where the terminal 400 specifically refers to a first terminal, and specifically includes the following functional modules:

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

a link releasing module 402, configured to release the unicast link according to the connection release request message.

the identity of the source is identified,

the identification of the purpose is carried out,

A radio resource on which a discovery signal is transmitted.

Preferably, the connection release reason includes at least one of:

the quality of service (QoS) of the data packet or the data stream transmitted through the unicast link does not meet the preset threshold condition,

a radio link failure occurs with the unicast link between the second terminal,

the channel quality of the unicast link is below a second threshold, an

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

Preferably, the QoS includes: at least one of traffic priority, latency, reliability, communication distance, payload size, transmission rate, and data rate.

The terminal 400 of the embodiment may further include:

a feedback module, configured to feed back, to the second terminal, indication information indicating that connection release is completed after the unicast link is released according to the connection release request message, where the indication information is used to indicate the first terminal to release the unicast link.

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

the physical layer feeds back the information that,

radio link control, RLC, layer feedback information, and

a unicast link release complete message.

The terminal 400 of the embodiment may further include:

and the notification module is used for notifying the unicast link release to an upper layer by an access AS layer of the terminal after the unicast link is released according to the connection release request message.

The terminal 400 of the embodiment may further include:

and the first transmission module is used for accessing the AS layer to send or receive a discovery signal after the unicast link is released according to the connection release request message.

Or, the second transmission module is configured to, after releasing the unicast link according to the connection release request message, send or receive the discovery signal by the AS layer under an upper layer notification, where the upper layer notification is sent by the upper layer after the AS layer notifies the unicast link to be released.

The terminal 400 of the embodiment may further include:

a second sending module, configured to send a connection establishment request message of a unicast link to a second terminal before receiving a connection release request message of a unicast link of a sidelink sent by the second terminal, so as to establish a unicast link with the second terminal;

or, the second receiving module is configured to receive, before receiving a connection release request message of a unicast link of a sidelink sent by a second terminal, a connection establishment request message of the unicast link sent by the second terminal, so as to establish a unicast link with the second terminal.

According to the terminal provided by the embodiment of the invention, the first receiving module receives the connection release request message of the unicast link of the sidelink sent by the second terminal, and the link release module releases the unicast link according to the connection release request message, so that the terminal can effectively support the timely release of the established unicast link connection on the sidelink, the utilization rate of wireless resources and the link management efficiency are improved, and the effective support of the advanced V2X unicast service can be ensured.

As shown in fig. 5, the terminal 500 according to the embodiment of the present invention can implement the details of the link releasing methods of the embodiments and the intermediate link shown in fig. 2 and fig. 3, and achieve the same effect, where the terminal 500 specifically refers to a second terminal, and specifically includes the following functional modules:

a first sending module 501, configured to send a connection release request message of a unicast link of the sidelink to the first terminal.

Preferably, the first sending module 501 may include:

and the sending unit is used for sending a connection release request message of the unicast link of the side link to the first terminal when a preset condition is met.

Preferably, the preset condition includes at least one of:

Preferably, 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 event triggering, or the auxiliary information is reported periodically.

Preferably, the auxiliary information includes: at least one of quality of service Qos, radio link failure information, channel quality information, and reference signal quality information.

the identity of the source is identified,

the identification of the purpose is carried out,

A radio resource on which a discovery signal is transmitted.

Preferably, the connection release reason includes at least one of:

the QoS of the data packets or data streams transmitted over the unicast link does not meet a preset threshold condition,

a radio link failure occurs with a unicast link between the first terminal,

the channel quality of the unicast link is below a second threshold, an

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

The terminal 500 of the embodiment of the present invention may further include:

a third receiving module, configured to receive indication information of completing connection release sent by a first terminal after sending a connection release request message of a unicast link of a sidelink to the first terminal, where the indication information is used to indicate the first terminal to release the unicast link.

the physical layer feeds back the information that,

radio link control, RLC, layer feedback information, and

a unicast link release complete message.

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

or, a fourth transmission module, configured to send or receive the discovery signal by the AS layer under an upper layer notification, where the upper layer notification is sent by the AS layer after notifying the unicast link to be released.

a fourth receiving module, configured to receive, before sending a connection release request message of a unicast link of a sidelink to a first terminal, a connection establishment request message of the unicast link sent by the first terminal, so as to establish a unicast link with the first terminal;

or, the third sending module is configured to send a connection establishment request message of the unicast link to the first terminal before sending a connection release request message of a unicast link of the sidelink to the first terminal, so as to establish a unicast link with the first terminal.

The terminal of the embodiment of the invention sends the connection release request message of the unicast link of the sidelink to the first terminal through the first sending module, can effectively support the timely release of the established unicast link connection of the terminal on the sidelink, is beneficial to improving the utilization rate of wireless resources and the link management efficiency, and can ensure the effective support of the advanced V2X unicast service.

It should be noted that the division of each module of the above terminal is only a division of a logical function, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the determining module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the determining module is called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented 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 methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when some of the above modules are 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 invoke the program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).

To better achieve the above object, further, fig. 6 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present invention, where the terminal 600 includes, but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, and a power supply 611. Those skilled in the art will appreciate that the terminal configuration shown in fig. 6 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

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

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

The terminal of the embodiment of the invention can effectively support the timely release of the established unicast link connection of the terminal on the sidelink, is beneficial to improving the utilization rate of wireless resources and the management efficiency of the link, and supports different service requirements of link transmission, such as ensuring the effective support of advanced V2X unicast service.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 601 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 610; in addition, the uplink data is transmitted to the base station. In general, 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. Further, the radio frequency unit 601 may also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user through the network module 602, such as helping the user send and receive e-mails, 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 an audio signal and output as sound. Also, the audio output unit 603 can also provide audio output related to a specific function performed by the terminal 600 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 603 includes a speaker, a buzzer, a receiver, and the like.

The input unit 604 is used to receive audio or video signals. The input Unit 604 may include a Graphics Processing Unit (GPU) 6041 and a microphone 6042, and the Graphics processor 6041 processes image data of a still picture or video obtained by an image capturing apparatus (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 606. The image frames processed by the graphic 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 may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 601 in case of the phone call mode.

The terminal 600 also includes at least one sensor 605, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 6061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 6061 and/or the backlight when the terminal 600 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 605 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 606 is used 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 by a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 607 may be used to receive input 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 referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on or near touch panel 6071 using a finger, stylus, or any suitable object or accessory). The touch panel 6071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 610, receives a command from the processor 610, and executes the command. In addition, the touch panel 6071 can be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 607 may include other input devices 6072 in addition to the touch panel 6071. Specifically, the 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 track ball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 6071 can be overlaid on the display panel 6061, and when the touch panel 6071 detects a touch operation on or near the touch panel 6071, the touch operation is transmitted to the processor 610 to determine the type of the touch event, and then the processor 610 provides a corresponding visual output on the display panel 6061 according to the type of the touch event. Although in fig. 6, the touch panel 6071 and the display panel 6061 are two independent components to realize the input and output functions of the terminal, in some embodiments, the touch panel 6071 and the display panel 6061 may be integrated to realize the input and output functions of the terminal, and this is not limited here.

The interface unit 608 is an interface for connecting an external device to the terminal 600. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 608 may be used to receive 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 to transmit data between the terminal 600 and an external device.

The memory 609 may be used to store software programs as well as various data. The memory 609 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 609 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 610 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 609 and calling data stored in the memory 609, thereby performing overall monitoring of the terminal. Processor 610 may include one or more processing units; preferably, the processor 610 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 610.

The terminal 600 may further include a power supply 611 (e.g., a battery) for supplying power to the various components, and preferably, the power supply 611 is logically connected to the processor 610 via a power management system, so that functions of managing charging, discharging, and power consumption are performed via the power management system.

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

Preferably, an embodiment of the present invention further provides a terminal, including a processor 610, a memory 609, and a computer program stored in the memory 609 and capable of running on the processor 610, where the computer program, when executed by the processor 610, implements each process of the above-mentioned link release method for a sidelink, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. A terminal may be a wireless terminal or a wired terminal, and a wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (RAN), which may exchange language and/or data with the RAN. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an access Terminal (access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a User Equipment (User device User Equipment), which are not limited herein.

The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the embodiment of the link releasing method for a sidelink, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A method for releasing a link of a sidelink is applied to a first terminal, and is characterized by comprising the following steps:

2. The method of claim 1, wherein the connection release request message comprises at least one of the following information:

the identity of the source is identified,

the identification of the purpose is carried out,

A radio resource on which a discovery signal is transmitted.

3. The method of claim 2, wherein the connection release reason comprises at least one of the following:

a radio link failure occurs with the unicast link between the second terminal,

the channel quality of the unicast link is below a second threshold, an

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

4. The link release method for the sidelink as recited in claim 3, wherein said QoS comprises: at least one of traffic priority, latency, reliability, communication distance, payload size, transmission rate, and data rate.

5. The method for releasing a link of a sidelink as claimed in claim 1, wherein the step of releasing the unicast link according to the connection release request message further comprises:

6. The method of claim 5, wherein the indication information of the connection release completion comprises at least one of the following:

the physical layer feeds back the information that,

radio link control, RLC, layer feedback information, and

a unicast link release complete message.

7. The method for releasing a link of a sidelink as claimed in claim 1, wherein the step of releasing the unicast link according to the connection release request message further comprises:

and the access AS layer informs the unicast link release to the upper layer.

8. The method for releasing a link of a sidelink as claimed in claim 1, wherein the step of releasing the unicast link according to the connection release request message further comprises:

accessing an AS layer to send or receive a discovery signal;

alternatively, the first and second electrodes may be,

9. The method for releasing a link on a sidelink as claimed in claim 1, wherein, before the step of receiving the connection release request message on the unicast link on the sidelink sent by the second terminal, the method further comprises:

alternatively, the first and second electrodes may be,

10. A method for releasing a link of a sidelink, applied to a second terminal, is characterized by comprising:

11. The method for releasing a link on a sidelink as claimed in claim 10, wherein the step of sending a connection release request message for a unicast link on the sidelink to the first terminal comprises:

12. The method of claim 11, wherein the preset condition comprises at least one of the following:

13. The method of claim 12, wherein 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 event triggering, or the auxiliary information is reported periodically.

14. The method of claim 13, wherein the side information comprises: at least one of quality of service Qos, radio link failure information, channel quality information, and reference signal quality information.

15. The method of claim 10, wherein the connection release request message comprises at least one of the following information:

the identity of the source is identified,

the identification of the purpose is carried out,

A radio resource on which a discovery signal is transmitted.

16. The method of claim 15, wherein the connection release reason comprises at least one of the following:

a radio link failure occurs with a unicast link between the first terminal,

the channel quality of the unicast link is below a second threshold, an

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

17. The link release method for the sidelink as recited in claim 14 or 16, wherein the QoS comprises: at least one of traffic priority, latency, reliability, communication distance, payload size, transmission rate, and data rate.

18. The method for releasing a link on a sidelink as claimed in claim 10, wherein the step of sending a connection release request message for a unicast link on the sidelink to the first terminal further comprises:

19. The method of claim 18, wherein the indication information of the connection release completion comprises at least one of the following:

the physical layer feeds back the information that,

radio link control, RLC, layer feedback information, and

a unicast link release complete message.

20. The method of claim 18, wherein after the step of receiving the information indicating that the connection release is complete sent by the first terminal, the method further comprises:

accessing an AS layer to send or receive a discovery signal;

alternatively, the first and second electrodes may be,

21. The method for releasing a link on a sidelink as claimed in claim 10, wherein the step of sending a connection release request message for a unicast link on the sidelink to the first terminal is preceded by the step of:

alternatively, the first and second electrodes may be,

22. A terminal, comprising:

23. The terminal of claim 22, wherein the connection release request message comprises at least one of the following information:

the identity of the source is identified,

the identification of the purpose is carried out,

A radio resource on which a discovery signal is transmitted.

24. The terminal of claim 23, wherein the connection release reason comprises at least one of:

a radio link failure occurs with the unicast link between the second terminal,

the channel quality of the unicast link is below a second threshold, an

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

25. The terminal of claim 24, wherein the QoS comprises: at least one of traffic priority, latency, reliability, communication distance, payload size, transmission rate, and data rate.

26. The terminal of claim 22, wherein the terminal further comprises:

and a feedback module, configured to feed back, to the second terminal, indication information indicating that connection release is completed, where the indication information is used to indicate the first terminal to release the unicast link.

27. The terminal according to claim 26, wherein the indication information of the connection release completion comprises at least one of the following:

the physical layer feeds back the information that,

radio link control, RLC, layer feedback information, and

a unicast link release complete message.

28. The terminal of claim 22, wherein the terminal further comprises:

and the notification module is used for accessing the AS layer and notifying the unicast link release to the upper layer.

29. The terminal of claim 22, wherein the terminal further comprises:

the first transmission module is used for accessing the AS layer to send or receive the discovery signal;

or, a second transmission module, configured to send or receive the discovery signal by the AS layer under an upper layer notification, where the upper layer notification is sent by the AS layer after the AS layer notifies the unicast link to be released.

30. The terminal of claim 22, wherein the terminal further comprises:

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

or, the second receiving module is configured to receive a connection establishment request message of the unicast link sent by the second terminal, so as to establish the unicast link with the second terminal.

31. A terminal, comprising:

32. The terminal of claim 31, wherein the first sending module comprises:

33. The terminal of claim 32, wherein the preset condition comprises at least one of:

34. The terminal of claim 33, 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 event triggering, or the auxiliary information is reported periodically.

35. The terminal of claim 34, wherein the assistance information comprises: at least one of quality of service (Qos) information, radio link failure information, channel quality information, and reference signal quality information.

36. The terminal of claim 31, wherein the connection release request message comprises at least one of the following information:

the identity of the source is identified,

the identification of the purpose is carried out,

A radio resource on which a discovery signal is transmitted.

37. The terminal of claim 36, wherein the connection release reason comprises at least one of:

a radio link failure occurs with a unicast link between the first terminal,

the channel quality of the unicast link is below a second threshold, an

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

38. The terminal according to claim 35 or 37, wherein the QoS comprises: at least one of traffic priority, latency, reliability, communication distance, payload size, transmission rate, and data rate.

39. The terminal of claim 31, wherein the terminal further comprises:

a third receiving module, configured to receive indication information that connection release is completed, where the indication information is used to indicate the first terminal to release the unicast link.

40. The terminal according to claim 39, wherein the indication information of the connection release completion comprises at least one of the following:

the physical layer feeds back the information that,

radio link control, RLC, layer feedback information, and

a unicast link release complete message.

41. The terminal of claim 39, wherein the terminal further comprises:

42. The terminal of claim 31, wherein the terminal further comprises:

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

or, the third sending module is configured to send a connection establishment request message of the unicast link to the first terminal, so as to establish the unicast link with the first terminal.

43. A terminal, characterized in that the terminal comprises a processor, a memory and a computer program stored on the memory and running on the processor, which computer program, when executed by the processor, implements the steps of the link release method for sidelinks as claimed in any one of claims 1 to 9 or as claimed in any one of claims 10 to 21.

44. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the link release method for a sidelink as claimed in any one of claims 1 to 9 or 10 to 21.