WO2020063263A1 - 旁链路的链路释放方法及终端 - Google Patents
旁链路的链路释放方法及终端 Download PDFInfo
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- WO2020063263A1 WO2020063263A1 PCT/CN2019/103995 CN2019103995W WO2020063263A1 WO 2020063263 A1 WO2020063263 A1 WO 2020063263A1 CN 2019103995 W CN2019103995 W CN 2019103995W WO 2020063263 A1 WO2020063263 A1 WO 2020063263A1
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- link
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- unicast link
- release
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- 230000005540 biological transmission Effects 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 12
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- 238000005516 engineering process Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
- H04W76/34—Selective release of ongoing connections
Definitions
- 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.
- 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.
- Uplink Uplink
- Downlink Downlink
- Sidelink Sidelink
- Secondarylink 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.
- 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).
- V2X basic safety communication for vehicles
- the side link communicates based on the broadcast mechanism.
- the sending terminal cannot determine the receiving result of the receiving terminal.
- the sending 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.
- 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.
- an embodiment of the present disclosure provides a link release method for a side link, which is applied to a first terminal and includes:
- 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.
- 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.
- 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.
- 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.
- 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.
- the terminal 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.
- 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
- FIG. 2 is a schematic flowchart of a method for releasing a link of a side link according to an embodiment of the present disclosure
- FIG. 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
- FIG. 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.
- 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;
- 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.
- the side link may include: a new air interface (New Radio, NR) Sidelink.
- NR New Radio
- Step 102 Release the unicast link according to the connection release request message.
- the method for releasing a side link connection 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.
- connection release request message includes at least one of the following information:
- Radio resources for transmitting discovery signals are 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
- the reference signal quality of the unicast link is lower than a third threshold.
- the quality of service includes: service priority (Priority), latency (ms), reliability (%), communication distance (Communication range) (meters), payload size (bytes), transmission rate (message) (sec), and data rate (Mbps).
- 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.
- 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.
- the indication information of completion of connection release includes at least one of the following:
- 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 method may further include the following steps:
- the access AS layer informs the upper layer of the release of the unicast link.
- the upper layer includes more than the Access Stratum (AS). That is, the NAS layer and / or the application layer.
- AS Access Stratum
- the method may further include the following steps:
- Access the AS layer to send or receive discovery signals
- 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 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.
- the upper layer includes more than the AS layer, such as the NAS layer and / or the application layer.
- the method may further include the following steps:
- 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.
- the source identifier in the connection release request message is the source identifier of the first terminal
- the destination identifier is the identifier of the second terminal. Destination ID.
- 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 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.
- 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.
- 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.
- 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.
- step 201 may specifically include the following steps:
- a connection release request message for a unicast link of a side link is sent to the first terminal.
- the preset condition includes at least one of the following:
- 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.
- 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.
- 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 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.
- the AS layer determines to release the unicast link connection established with the first terminal or release all established unicast link connections.
- connection release request message includes at least one of the following information:
- Radio resources for transmitting discovery signals are 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
- the reference signal quality of the unicast link is lower than a third threshold.
- the QoS includes at least one of service priority, delay, reliability, communication distance, payload size, transmission rate, and data rate.
- 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.
- the method may further include the following steps:
- the indication information of completion of connection release includes at least one of the following:
- the physical layer feedback information specifically refers to the physical layer feedback information of the first terminal.
- the RLC layer feedback information specifically refers to 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 method may further include the following steps:
- Access the AS layer to send or receive discovery signals
- 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 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.
- the upper layer includes more than the AS layer. That is, the NAS layer and / or the application layer.
- the method may further include the following steps:
- 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.
- the source identifier in the connection release request message is the source identifier sourceID of the second terminal
- the destination identifier is the destination identifier of the first terminal destination ID
- the source identifier in the connection release request message is the source identifier sourceID of the first terminal
- the destination identifier is the destination identifier destinationID of the second terminal.
- a method for releasing a link of a side link 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.
- FIG. 3 uses FIG. 3 as an example to specifically describe a specific implementation process of the link release method of the side link.
- UE_1 represents a first terminal
- UE_2 represents a second terminal.
- 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.
- 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 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.
- the upper layer includes more than the AS layer. That is, the NAS layer and / or the application layer.
- the AS layer reports auxiliary information to the upper layer.
- 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.
- the auxiliary information is reported based on an event trigger, or the auxiliary information is reported periodically.
- 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 QoS includes at least one of service priority, delay, reliability, communication distance, payload size, transmission rate, and data rate.
- the AS layer determines to release the unicast link connection established with the first terminal or release all established unicast link connections.
- connection release request message includes at least one of the following information:
- the reason for the connection release of the unicast link includes at least one of the following:
- 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.
- 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.
- the indication information is used to indicate that the unicast link connection of UE_2 is successfully released.
- the indication of completion of the connection release includes at least one of the following:
- 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 terminal 400 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.
- connection release request message includes at least one of the following information:
- Radio resources for transmitting discovery signals are Radio resources for transmitting discovery signals.
- 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
- the reference signal quality of the unicast link is lower than a third threshold.
- 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.
- the indication information of completion of connection release includes at least one of the following:
- 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.
- 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;
- 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.
- the terminal 500 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.
- 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.
- the preset condition includes at least one of the following:
- the access AS layer determines to release a unicast link with the first terminal.
- 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.
- the auxiliary information includes at least one of quality of service Qos, wireless link failure information, channel quality information, and reference signal quality information.
- connection release request message includes at least one of the following information:
- Radio resources for transmitting discovery signals are Radio resources for transmitting discovery signals.
- the reason for the connection release 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
- the reference signal quality of the unicast link is lower than a third threshold.
- the QoS includes at least one of service priority, delay, reliability, communication distance, payload size, transmission rate, and data rate.
- 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.
- the indication information of completion of connection release includes at least one of the following:
- the terminal 500 in the embodiment of the present disclosure may further include:
- a third transmission module configured to access the AS layer to send or receive a discovery signal
- 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 500 in the embodiment of the present disclosure may further include:
- 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;
- 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.
- 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.
- 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.
- 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.
- 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.
- 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).
- ASIC application specific integrated circuits
- DSP digital signal processor
- FPGA Field Programmable Gate Array
- the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can call program code.
- CPU Central Processing Unit
- these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).
- SOC system-on-a-chip
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- an accelerometer sensor can detect the magnitude of acceleration in various directions (usually three axes).
- 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.
- LCD liquid crystal display
- OLED organic light-emitting diode
- 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.
- 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.
- 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.
- various types such as resistive, capacitive, infrared, and surface acoustic wave can be used to implement the touch panel 6071.
- the user input unit 607 may further include other input devices 6072.
- 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.
- the touch panel 6071 may be overlaid on the display panel 6061.
- 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.
- 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.
- 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.
- 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.
- a power source 611 such as a battery
- 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.
- the terminal 600 includes some functional modules that are not shown, and details are not described herein again.
- 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.
- 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).
- RAN Radio Access Network
- the wireless terminal can be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal
- a mobile terminal such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal
- 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.
- PCS Personal Communication Service
- SIP Session Initiation Protocol
- WLL Wireless Local Loop
- PDA Personal Digital Assistant
- 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 Equipment
- 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.
- the disclosed apparatus and method may be implemented in other ways.
- the device embodiments described above are only schematic.
- the division of the unit is only a logical function division.
- multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
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Abstract
本公开公开了一种旁链路的链路释放方法及终端，其中，所述方法包括：接收第二终端发送的旁链路的单播链路的连接释放请求消息，根据所述连接释放请求消息，释放所述单播链路。
Description
相关申请的交叉引用
本申请主张在2018年9月25日在中国提交的中国专利申请No.201811116603.2的优先权，其全部内容通过引用包含于此。
本公开涉及通信技术领域，尤其涉及一种旁链路的链路释放方法及终端。
为满足不同应用场景，移动通信系统不仅支持上行链路(Uplink)传输和下行链路(Downlink)传输，还可支持旁链路(Sidelink)，或称为副链路、侧链路、边链路等传输，旁链路传输用于终端之间不通过网络设备而进行直接传输。
其中，旁链路传输可用于支持公共安全业务如火灾场所或地震等灾难场所进行紧急通讯，或车联网(vehicle to everything，V2X)的基本安全类通信。但是相关技术中旁链路是基于广播机制通信的，发送端终端无法确定接收端终端的接收结果，为提高传输可靠性，发送端终端始终按照最大重传次数向接收端终端发送数据，因此导致系统无线资源利用率较低，无法满足高级V2X业务的质量需求，如自动驾驶、传感器扩展等要求低时延、高可靠、大数据量的高级V2X业务。
发明内容
本公开实施例提供了一种旁链路的链路释放方法及终端，以解决相关技术中旁链路无线资源利用率和链路管理效率较低的问题。
第一方面，本公开实施例提供了一种旁链路的链路释放方法，应用于第一终端，包括：
接收第二终端发送的旁链路的单播链路的连接释放请求消息；
根据所述连接释放请求消息，释放所述单播链路。
第二方面，本公开实施例提供了一种旁链路的链路释放方法，应用于第二终端，包括：
向第一终端发送旁链路的单播链路的连接释放请求消息。
第三方面，本公开实施例还提供了一种终端，包括：
第一接收模块，用于接收第二终端发送的旁链路的单播链路的连接释放请求消息；
链路释放模块，用于根据所述连接释放请求消息，释放所述单播链路。
第四方面，本公开实施例提供了一种终端，包括：
第一发送模块，用于向第一终端发送旁链路的单播链路的连接释放请求消息。
第五方面，本公开实施例还提供了一种终端，包括处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如上所述的旁链路的链路释放方法的步骤。
第六方面，本公开实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如上所述的旁链路的链路释放方法的步骤。
这样，本公开实施例中，通过接收第二终端发送的旁链路的单播链路的连接释放请求消息，根据所述连接释放请求消息，释放所述单播链路，能够有效支持终端在旁链路上已建立的单播链路连接的及时释放，有利于提高无线资源利用率和链路管理效率。
为了更清楚地说明本公开实施例的技术方案，下面将对本公开实施例的描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1表示本公开实施例的旁链路的链路释放方法的流程示意图之一；
图2表示本公开实施例的旁链路的链路释放方法的流程示意图之二；
图3表示本公开实施例的旁链路的链路释放方法的流程示意图之三；
图4表示本公开实施例提供的终端的结构示意图之一；
图5表示本公开实施例提供的终端的结构示意图之二；
图6表示本公开实施例提供的终端的框图。
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。说明书以及权利要求中“和/或”表示所连接对象的至少其中之一。
如图1所示，为本公开实施例提供的旁链路的链路释放方法的流程示意图，该方法应用于第一终端。
步骤101，接收第二终端发送的旁链路的单播链路的连接释放请求消息；
这里，第二终端发送旁链路的单播链路的连接释放请求消息之前，第一终端和第二终端之间已建立点对点的单播链路的连接，即第一终端与第二终端之间处于连接状态。
这里，旁链路可以包括：新空口(New Radio，NR)Sidelink。
步骤102，根据所述连接释放请求消息，释放所述单播链路。
本公开实施例的旁链路连接释放方法，通过接收第二终端发送的旁链路的单播链路的连接释放请求消息，根据所述连接释放请求消息，释放所述单播链路，能够有效支持终端在旁链路上已建立的单播链路连接的及时释放， 有利于提高无线资源利用率和链路管理效率，可保证对高级V2X单播业务的有效支持。
可选地，所述连接释放请求消息包括以下信息中的至少一项：
源标识，
目的标识，
用于指示单播链路的连接释放原因的原因值，以及
传输发现信号的无线资源。
其中，所述连接释放原因包括以下中的至少一项：
通过所述单播链路传输的数据包或数据流的业务质量QoS不满足预设门限条件，
与所述第二终端之间的单播链路发生无线链路失败，
所述单播链路的信道质量低于第二门限值，以及
所述单播链路的参考信号质量低于第三门限值。
这里，可选地，所述业务质量(Quality of Service，QoS)包括：业务优先级(Priority)、时延(Latency)(ms)、可靠性(Reliability)(％)、通信距离(Communication range)(meters)、载荷大小(payload)(bytes)、发送速率(Transmission rate，message)(sec)和数据速率(Data rate)(Mbps)中的至少一项。
需要说明的是，所述单播链路传输的数据包或数据流的上述QoS不满足预设门限条件，说明该单播链路的连接无法满足第一终端和第二终端的数据包或数据流QoS需求。
所述单播链路的信道质量低于第二门限值，说明第一终端与第二终端之间单播链路的信道质量较差。
基于图1所示的实施例，作为可选的实现方式，步骤102之后，所述方法还可以包括以下步骤：
向所述第二终端反馈连接释放完成的指示信息，所述指示信息用于指示所述第一终端释放单播链路。
这里，可选地，所述连接释放完成的指示信息包括以下中的至少一项：
物理层反馈信息，
无线链路控制RLC层反馈信息，以及
单播链路释放完成消息。
这里，物理层反馈信息具体是指第一终端的物理层反馈信息。
无线链路控制(Radio Link Control，RLC)层反馈信息具体是指第一终端的RLC反馈信息。
单播链路释放完成消息用于对单播链路连接建立释放消息的应答，表示单播链路释放成功。
基于图1所示的实施例，作为可选的实现方式，步骤102之后，所述方法还可以包括以下步骤：
接入AS层向上层通知所述单播链路释放。
本步骤中，上层包括接入层(Access Stratum，AS)以上。即NAS层和/或应用层。
基于图1所示的实施例，作为可选的实现方式，步骤102之后，所述方法还可以包括以下步骤：
接入AS层发送或接收发现信号；
或者，
所述AS层在上层通知下发送或接收所述发现信号，所述上层通知是所述上层在所述AS层通知所述单播链路释放后发送的。
这里，第一终端的AS层通过直接(自己)或者间接(上层通知)的方式发送发现discovery信号，其目的是为了主动告知周围的其他终端目前自己处于空闲状态，可与其他终端中的任一终端建立单播链路连接。
第一终端的AS层通过直接(自己)或者间接(上层的通知)的方式接收发现信号，通过接收到的发现信号能够获知周围存在哪些终端可以与之建立单播链路连接。
需要说明的是，上层包括AS层以上，如NAS层和/或应用层。
基于图1所示的实施例，作为可选的实现方式，步骤101之前，所述方法还可以包括以下步骤：
向所述第二终端发送所述单播链路的连接建立请求消息，以建立与所述第二终端之间的单播链路；
或者，
接收所述第二终端发送的所述单播链路的连接建立请求消息，以建立与所述第二终端之间的单播链路。
这里，上述步骤的实施表明第一终端为单播链路的连接建立发起方，或者第一终端为单播链路的连接建立被发起方。
需要说明的是，在第一终端为单播链路的连接建立发起方的情况下，连接释放请求消息中的源标识为第一终端的源标识(source ID)，目的标识为第二终端的目的标识(destination ID)。
在第一终端为单播链路的连接建立被发起方的情况下，连接释放请求消息中的源标识为第二终端的源标识(source ID)，目的标识为第一终端的目的标识(destination ID)。
本公开实施例的旁链路的链路释放方法，通过接收第二终端发送的旁链路的单播链路的连接释放请求消息，根据所述连接释放请求消息，释放所述单播链路，能够有效支持终端在旁链路上已建立的单播链路连接的及时释放，有利于提高无线资源利用率和链路管理效率，可保证对高级V2X单播业务的有效支持。
如图2所示，为本公开实施例提供的旁链路的链路释放方法的流程示意图，该方法应用于第二终端。
步骤201，向第一终端发送旁链路的单播链路的连接释放请求消息。
这里，第二终端在向第一终端发送旁链路的单播链路的连接释放请求消息之前，第一终端和第二终端之间已建立点对点的单播链路的连接，即第一终端与第二终端之间处于连接状态。
这里，旁链路可以包括：NR Sidelink。
本公开实施例的旁链路的链路释放方法，通过向第一终端发送旁链路的单播链路的连接释放请求消息，使第一终端根据连接释放请求消息，释放所述单播链路，能够有效支持终端在旁链路上已建立的单播链路连接的及时释放，有利于提高无线资源利用率和链路管理效率，可保证对高级V2X单播业务的有效支持。
基于图2所示的实施例，作为本公开可选的实现方式，步骤201可以具 体包括以下步骤：
在满足预设条件时，向所述第一终端发送旁链路的单播链路的连接释放请求消息。
可选地，所述预设条件包括以下中的至少一项：
接收到用于指示释放与所述第一终端之间单播链路的释放请求，所述释放请求是上层发送的；
需要说明的是，所述释放请求是所述上层根据所述AS层上报的辅助信息确定的；其中，所述辅助信息是基于事件触发上报的，或者所述辅助信息是周期性上报的。
这里，具体的实现如下：
AS层上报辅助信息给上层，上层收到辅助信息后请求AS层释放与第一终端建立的单播链路连接或者指示其释放所有已建立的单播链路连接。
可选地，所述辅助信息包括：业务质量QoS，无线链路失败信息，信道质量信息，以及参考信号质量信息中的至少一项。
这里，所述QoS包括：业务优先级、时延、可靠性、通信距离、载荷大小、发送速率和数据速率中的至少一项。
接入AS层确定释放与所述第一终端之间单播链路。
这里，具体地，AS层确定释放与第一终端建立的单播链路连接或者释放所有已建立的单播链路连接。
基于图2所示的实施例，可选地，所述连接释放请求消息包括以下信息中的至少一项：
源标识，
目的标识，
用于指示单播链路的连接释放原因的原因值，以及
传输发现信号的无线资源。
其中，所述连接释放原因包括以下中的至少一项：
通过所述单播链路传输的数据包或数据流的QoS质量低于第一门限值不满足预设门限条件，
与所述第一终端之间的单播链路发生无线链路失败，
所述单播链路的信道质量低于第二门限值，以及
所述单播链路的参考信号质量低于第三门限值。
这里，可选地，所述QoS包括：业务优先级、时延、可靠性、通信距离、载荷大小、发送速率和数据速率中的至少一项。
需要说明的是，所述单播链路传输的数据包或数据流的上述QoS不满足预设门限条件，说明该单播链路的连接无法满足第一终端和第二终端的数据包或数据流QoS需求。
所述单播链路的信道质量低于第二门限值，说明第一终端与第二终端之间单播链路的信道质量较差。
基于图2所示的实施例，作为可选的实现方式，步骤201之后，所述方法还可以包括以下步骤：
接收所述第一终端发送的连接释放完成的指示信息，所述指示信息用于指示所述第一终端释放所述单播链路。
这里，可选地，所述连接释放完成的指示信息包括以下中的至少一项：
物理层反馈信息，
无线链路控制RLC层反馈信息，以及
单播链路释放完成消息。
这里，物理层反馈信息具体是指第一终端的物理层反馈信息。
RLC层反馈信息具体是指第一终端的RLC反馈信息。
单播链路释放完成消息用于对单播链路连接建立释放消息的应答，表示单播链路释放成功。
进一步地，在接收所述第一终端发送的连接释放完成的指示信息的步骤之后，所述方法还可以包括以下步骤：
接入AS层发送或接收发现信号；
或者，
所述AS层在上层通知下发送或接收所述发现信号，所述上层通知是所述上层在所述AS层通知所述单播链路释放后发送的。
这里，第二终端的AS层通过直接(自己)或者间接(上层通知)的方式发送发现(discovery)信号，其目的是为了主动告知周围的其他终端目前 自己处于空闲状态，可与其他终端中的任一终端建立单播链路连接。
第二终端的AS层通过直接(自己)或者间接(上层的通知)的方式接收发现信号，通过接收到的发现信号能够获知周围存在哪些终端可以与之建立单播链路连接。
需要说明的是，上层包括AS层以上。即NAS层和/或应用层。
基于图2所示的实施例，作为可选的实现方式，步骤201之前，所述方法还可以包括以下步骤：
接收所述第一终端发送的所述单播链路的连接建立请求消息，以建立与所述第一终端之间的单播链路；
或者，
向所述第一终端发送所述单播链路的连接建立请求消息，以建立与所述第一终端之间的单播链路。
这里，上述步骤的实施表明第二终端为单播链路的连接建立被发起方，或者第二终端为单播链路的连接建立发起方。
需要说明的是，在第二终端为单播链路的连接建立发起方的情况下，连接释放请求消息中的源标识为第二终端的源标识source ID，目的标识为第一终端的目的标识destination ID。
在第二终端为单播链路的连接建立被发起方的情况下，连接释放请求消息中的源标识为第一终端的源标识source ID，目的标识为第二终端的目的标识destination ID。
本公开实施例的旁链路的链路释放方法，通过接收第二终端发送的旁链路的单播链路的连接释放请求消息，根据所述连接释放请求消息，释放所述单播链路，能够有效支持终端在旁链路上已建立的单播链路连接的及时释放，有利于提高无线资源利用率和链路管理效率，可保证对高级V2X单播业务的有效支持。
下面以图3所示为例，具体说明该旁链路的链路释放方法的具体实施过程。
需说明的是，图3中UE_1表示第一终端，UE_2表示第二终端。其中，UE_1为与UE_2之间建立单播链路连接发起方，或者为与UE_2之间建立单 播链路连接被发起方。
S1：在满足预设条件时，UE_1触发向UE_2发送单播链路的连接释放请求(Unicast link Release Request)消息。即图3中①所示的Unicast link Release Request消息。
其中，预设条件包括以下中的至少一项：
a.接收到用于指示释放与UE_2之间单播链路的释放请求，该释放请求是上层发送的。
这里，上层包括AS层以上。即NAS层和/或应用层。
其中，具体的实现如下：
AS层上报辅助信息给上层，上层收到辅助信息后请求AS层释放与UE_2建立的单播链路连接或者指示其释放所有已建立的单播链路连接。其中，该辅助信息是基于事件触发上报的，或者该辅助信息是周期性上报的。
这里，辅助信息包括：业务质量QoS，无线链路失败信息，信道质量信息，以及参考信号质量信息中的至少一项。
这里，所述QoS包括：业务优先级、时延、可靠性、通信距离、载荷大小、发送速率和数据速率中的至少一项。
b.接入AS层确定释放与UE_2之间单播链路。
这里，具体地，AS层确定释放与第一终端建立的单播链路连接或者释放所有已建立的单播链路连接。
需要说明的是，连接释放请求消息包括以下信息中的至少一项：
源标识source ID(UE_1)，
目的标识destination ID(UE_2)，
用于指示单播链路的连接释放原因的原因值Cause value，以及
发送和/或接收发现discovery信号的无线资源。
这里，单播链路的连接释放原因包括以下中的至少一项：
(1)UE_1与UE_2的数据包或数据流QoS需求无法满足
(2)UE_1与UE_2之间发生无线链路失败
(3)UE_1与UE_2之间信道质量较差(低于给定阈值)
(4)UE_1与UE_2之间参考信号质量较差
当然，除上述提到的原因外，还可以包括其他单播链路的连接释放原因。
S2：UE_2接收到UE_1发送的单播链路的连接释放请求消息，根据该连接释放请求消息，释放该单播链路连接。
其中，在UE_2释放该单播链路连接之后，UE_2的AS层确定触发发送或接收发现discovery信号；或者，UE_2的AS层通知上层，由上层确定并通知AS层触发发送或接收discovery信号。
S3：UE_1接收UE_2发送的连接释放完成的指示信息。
这里，该指示信息用于指示UE_2的单播链路连接被释放成功。
具体地，该连接释放完成的指示信息包括以下中的至少一项：
UE_2的物理层反馈信息；
UE_2的RLC层反馈信息；以及
UE_2的单播链路释放完成消息。
这里，进一步地，UE_1接收UE_2发送的连接释放完成的指示信息之后，也就是，UE_1确认在UE_2的单播链路连接被成功释放之后，UE_1的AS层确定触发发送或接收发现discovery信号；或者，UE_1的AS层通知上层，由上层确定并通知AS层触发发送或接收discovery信号。
以上实施例分别详细介绍了不同场景下的旁链路的链路释放方法，下面本实施例将结合附图对其对应的终端做进一步介绍。
如图4所示，本公开实施例的终端400，能实现如图1所示和图3所示的实施例和中旁链路的链路释放方法的细节，并达到相同的效果，该终端400具体指的是第一终端，具体包括以下功能模块：
第一接收模块401，用于接收第二终端发送的旁链路的单播链路的连接释放请求消息；
链路释放模块402，用于根据所述连接释放请求消息，释放所述单播链路。
可选地，所述连接释放请求消息包括以下信息中的至少一项：
源标识，
目的标识，
用于指示单播链路的连接释放原因的原因值，以及
传输发现信号的无线资源。
可选地，所述连接释放原因包括以下中的至少一项：
通过所述单播链路传输的数据包或数据流业务质量QoS不满足预设门限条件，
与所述第二终端之间的单播链路发生无线链路失败，
所述单播链路的信道质量低于第二门限值，以及
所述单播链路的参考信号质量低于第三门限值。
可选地，所述QoS包括：业务优先级、时延、可靠性、通信距离、载荷大小、发送速率和数据速率中的至少一项。
本实施例的终端400还可包括：
反馈模块，用于根据所述连接释放请求消息，释放所述单播链路之后，向所述第二终端反馈连接释放完成的指示信息，所述指示信息用于指示第一终端释放单播链路。
可选地，所述连接释放完成的指示信息包括以下中的至少一项：
物理层反馈信息，
无线链路控制RLC层反馈信息，以及
单播链路释放完成消息。
本实施例的终端400还可包括：
通知模块，用于根据所述连接释放请求消息，释放所述单播链路之后，终端的接入AS层向上层通知所述单播链路释放。
本实施例的终端400还可包括：
第一传输模块，用于根据所述连接释放请求消息，释放所述单播链路之后，接入AS层发送或接收发现信号。
或者，第二传输模块，用于根据所述连接释放请求消息，释放所述单播链路之后，所述AS层在上层通知下发送或接收所述发现信号，所述上层通知是所述上层在所述AS层通知所述单播链路释放后发送的。
本实施例的终端400还可包括：
第二发送模块，用于接收第二终端发送的旁链路的单播链路的连接释放请求消息之前，向所述第二终端发送所述单播链路的连接建立请求消息，以 建立与所述第二终端之间的单播链路；
或者，第二接收模块，用于接收第二终端发送的旁链路的单播链路的连接释放请求消息之前，接收所述第二终端发送的所述单播链路的连接建立请求消息，以建立与所述第二终端之间的单播链路。
本公开实施例的终端，通过第一接收模块接收第二终端发送的旁链路的单播链路的连接释放请求消息，链路释放模块根据所述连接释放请求消息，释放所述单播链路，能够有效支持终端在旁链路上已建立的单播链路连接的及时释放，有利于提高无线资源利用率和链路管理效率，可保证对高级V2X单播业务的有效支持。
如图5所示，本公开实施例的终端500，能实现如图2所示和图3所示的实施例和中旁链路的链路释放方法的细节，并达到相同的效果，该终端500具体指的是第二终端，具体包括以下功能模块：
第一发送模块501，用于向第一终端发送旁链路的单播链路的连接释放请求消息。
可选地，所述第一发送模块501可以包括：
发送单元，用于在满足预设条件时，向所述第一终端发送旁链路的单播链路的连接释放请求消息。
可选地，所述预设条件包括以下中的至少一项：
接收到用于指示释放与所述第一终端之间单播链路的释放请求，所述释放请求是上层发送的；
接入AS层确定释放与所述第一终端之间单播链路。
可选地，所述释放请求是所述上层根据所述AS层上报的辅助信息确定的；其中，所述辅助信息是基于事件触发上报的，或者所述辅助信息是周期性上报。
可选地，所述辅助信息包括：业务质量Qos，无线链路失败信息，信道质量信息，以及参考信号质量信息中的至少一项。
可选地，所述连接释放请求消息包括以下信息中的至少一项：
源标识，
目的标识，
用于指示单播链路的连接释放原因的原因值，以及
传输发现信号的无线资源。
可选地，所述连接释放原因包括以下中的至少一项：
通过所述单播链路传输的数据包或数据流的QoS不满足预设门限条件，
与所述第一终端之间的单播链路发生无线链路失败，
所述单播链路的信道质量低于第二门限值，以及
所述单播链路的参考信号质量低于第三门限值。
可选地，所述QoS包括：业务优先级、时延、可靠性、通信距离、载荷大小、发送速率和数据速率中的至少一项。
本公开实施例的终端500，还可包括：
第三接收模块，用于向第一终端发送旁链路的单播链路的连接释放请求消息之后，接收所述第一终端发送的连接释放完成的指示信息，所述指示信息用于指示所述第一终端释放所述单播链路。
可选地，所述连接释放完成的指示信息包括以下中的至少一项：
物理层反馈信息，
无线链路控制RLC层反馈信息，以及
单播链路释放完成消息。
本公开实施例的终端500，还可包括：
第三传输模块，用于接入AS层发送或接收发现信号；
或者，第四传输模块，用于所述AS层在上层通知下发送或接收所述发现信号，所述上层通知是所述上层在所述AS层通知所述单播链路释放后发送的。
本公开实施例的终端500，还可包括：
第四接收模块，用于向第一终端发送旁链路的单播链路的连接释放请求消息之前，接收所述第一终端发送的所述单播链路的连接建立请求消息，以建立与所述第一终端之间的单播链路；
或者，第三发送模块，用于向第一终端发送旁链路的单播链路的连接释放请求消息之前，向所述第一终端发送所述单播链路的连接建立请求消息，以建立与所述第一终端之间的单播链路。
本公开实施例的终端，通过第一发送模块向第一终端发送旁链路的单播链路的连接释放请求消息，能够有效支持终端在旁链路上已建立的单播链路连接的及时释放，有利于提高无线资源利用率和链路管理效率，可保证对高级V2X单播业务的有效支持。
需要说明的是，应理解以上终端的各个模块的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。且这些模块可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分模块通过处理元件调用软件的形式实现，部分模块通过硬件的形式实现。例如，确定模块可以为单独设立的处理元件，也可以集成在上述装置的某一个芯片中实现，此外，也可以以程序代码的形式存储于上述装置的存储器中，由上述装置的某一个处理元件调用并执行以上确定模块的功能。其它模块的实现与之类似。此外这些模块全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件可以是一种集成电路，具有信号的处理能力。在实现过程中，上述方法的各步骤或以上各个模块可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。
例如，以上这些模块可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(Application Specific Integrated Circuit，ASIC)，或，一个或多个微处理器(digital signal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)等。再如，当以上某个模块通过处理元件调度程序代码的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，CPU)或其它可以调用程序代码的处理器。再如，这些模块可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现。
为了更好的实现上述目的，进一步地，图6为实现本公开各个实施例的一种终端的硬件结构示意图，该终端600包括但不限于：射频单元601、网络模块602、音频输出单元603、输入单元604、传感器605、显示单元606、用户输入单元607、接口单元608、存储器609、处理器610、以及电源611等部件。本领域技术人员可以理解，图6中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者 不同的部件布置。在本公开实施例中，终端包括但不限于手机、平板电脑、笔记本电脑、掌上电脑、车载终端、可穿戴设备、以及计步器等。
其中，射频单元601，用于接收第二终端发送的旁链路的单播链路的连接释放请求消息；处理器610，用于根据所述连接释放请求消息，释放所述单播链路。
或者，射频单元601，用于向第一终端发送旁链路的单播链路的连接释放请求消息。
本公开实施例的终端，能够有效支持终端在旁链路上已建立的单播链路连接的及时释放，有利于提高无线资源利用率和链路管理效率，以支持链路传输的不同业务需求，如保证对高级V2X单播业务的有效支持。
应理解的是，本公开实施例中，射频单元601可用于收发信息或通话过程中，信号的接收和发送，具体地，将来自基站的下行数据接收后，给处理器610处理；另外，将上行的数据发送给基站。通常，射频单元601包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。此外，射频单元601还可以通过无线通信系统与网络和其他设备通信。
终端通过网络模块602为用户提供了无线的宽带互联网访问，如帮助用户收发电子邮件、浏览网页和访问流式媒体等。
音频输出单元603可以将射频单元601或网络模块602接收的或者在存储器609中存储的音频数据转换成音频信号并且输出为声音。而且，音频输出单元603还可以提供与终端600执行的特定功能相关的音频输出(例如，呼叫信号接收声音、消息接收声音等等)。音频输出单元603包括扬声器、蜂鸣器以及受话器等。
输入单元604用于接收音频或视频信号。输入单元604可以包括图形处理器(Graphics Processing Unit，GPU)6041和麦克风6042，图形处理器6041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。处理后的图像帧可以显示在显示单元606上。经图形处理器6041处理后的图像帧可以存储在存储器609(或其它存储介质)中或者经由射频单元601或网络模块602进行发送。麦克风6042可以接收声音，并且能够将这样的声音处理为音频数据。处理后的音频数据可以 在电话通话模式的情况下转换为可经由射频单元601发送到移动通信基站的格式输出。
终端600还包括至少一种传感器605，比如光传感器、运动传感器以及其他传感器。具体地，光传感器包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板6061的亮度，接近传感器可在终端600移动到耳边时，关闭显示面板6061和/或背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别终端姿态(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；传感器605还可以包括指纹传感器、压力传感器、虹膜传感器、分子传感器、陀螺仪、气压计、湿度计、温度计、红外线传感器等，在此不再赘述。
显示单元606用于显示由用户输入的信息或提供给用户的信息。显示单元606可包括显示面板6061，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板6061。
用户输入单元607可用于接收输入的数字或字符信息，以及产生与终端的用户设置以及功能控制有关的键信号输入。具体地，用户输入单元607包括触控面板6071以及其他输入设备6072。触控面板6071，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板6071上或在触控面板6071附近的操作)。触控面板6071可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器610，接收处理器610发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板6071。除了触控面板6071，用户输入单元607还可以包括其他输入设备6072。具体地，其他输入设备6072可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。
进一步地，触控面板6071可覆盖在显示面板6061上，当触控面板6071 检测到在其上或附近的触摸操作后，传送给处理器610以确定触摸事件的类型，随后处理器610根据触摸事件的类型在显示面板6061上提供相应的视觉输出。虽然在图6中，触控面板6071与显示面板6061是作为两个独立的部件来实现终端的输入和输出功能，但是在某些实施例中，可以将触控面板6071与显示面板6061集成而实现终端的输入和输出功能，具体此处不做限定。
接口单元608为外部装置与终端600连接的接口。例如，外部装置可以包括有线或无线头戴式耳机端口、外部电源(或电池充电器)端口、有线或无线数据端口、存储卡端口、用于连接具有识别模块的装置的端口、音频输入/输出(I/O)端口、视频I/O端口、耳机端口等等。接口单元608可以用于接收来自外部装置的输入(例如，数据信息、电力等等)并且将接收到的输入传输到终端600内的一个或多个元件或者可以用于在终端600和外部装置之间传输数据。
存储器609可用于存储软件程序以及各种数据。存储器609可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器609可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
处理器610是终端的控制中心，利用各种接口和线路连接整个终端的各个部分，通过运行或执行存储在存储器609内的软件程序和/或模块，以及调用存储在存储器609内的数据，执行终端的各种功能和处理数据，从而对终端进行整体监控。处理器610可包括一个或多个处理单元；可选地，处理器610可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器610中。
终端600还可以包括给各个部件供电的电源611(比如电池)，可选地，电源611可以通过电源管理系统与处理器610逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
另外，终端600包括一些未示出的功能模块，在此不再赘述。
可选地，本公开实施例还提供一种终端，包括处理器610，存储器609，存储在存储器609上并可在所述处理器610上运行的计算机程序，该计算机程序被处理器610执行时实现上述旁链路的链路释放方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，终端可以是无线终端也可以是有线终端，无线终端可以是指向用户提供语音和/或其他业务数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(Personal Communication Service，PCS)电话、无绳电话、会话发起协议(Session Initiation Protocol，SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)等设备。无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、用户设备(User Device or User Equipment)，在此不作限定。
本公开实施例还提供一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现上述旁链路的链路释放方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本公开的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描 述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本公开各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本公开的技术方案本质上或者说对相关技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本公开各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
此外，需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行，某些步骤可以并行或彼此独立地执行。对本领域的普通技术人员而言，能够理解本公开的方法和装置的 全部或者任何步骤或者部件，可以在任何计算装置(包括处理器、存储介质等)或者计算装置的网络中，以硬件、固件、软件或者它们的组合加以实现，这是本领域普通技术人员在阅读了本公开的说明的情况下运用他们的基本编程技能就能实现的。
因此，本公开的目的还可以通过在任何计算装置上运行一个程序或者一组程序来实现。所述计算装置可以是公知的通用装置。因此，本公开的目的也可以仅仅通过提供包含实现所述方法或者装置的程序代码的程序产品来实现。也就是说，这样的程序产品也构成本公开，并且存储有这样的程序产品的存储介质也构成本公开。显然，所述存储介质可以是任何公知的存储介质或者将来所开发出来的任何存储介质。还需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行。某些步骤可以并行或彼此独立地执行。
以上所述的是本公开的可选的实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本公开所述的原理前提下还可以作出若干改进和润饰，这些改进和润饰也在本公开的保护范围内。
Claims (44)
- 一种旁链路的链路释放方法，应用于第一终端，包括：接收第二终端发送的旁链路的单播链路的连接释放请求消息；根据所述连接释放请求消息，释放所述单播链路。
- 根据权利要求1所述的旁链路的链路释放方法，其中，所述连接释放请求消息包括以下信息中的至少一项：源标识，目的标识，用于指示单播链路的连接释放原因的原因值，以及传输发现信号的无线资源。
- 根据权利要求2所述的旁链路的链路释放方法，其中，所述连接释放原因包括以下中的至少一项：通过所述单播链路传输的数据包或数据流业务质量QoS不满足预设门限条件，与所述第二终端之间的单播链路发生无线链路失败，所述单播链路的信道质量低于第二门限值，以及所述单播链路的参考信号质量低于第三门限值。
- 根据权利要求3所述的旁链路的链路释放方法，其中，所述QoS包括：业务优先级、时延、可靠性、通信距离、载荷大小、发送速率和数据速率中的至少一项。
- 根据权利要求1所述的旁链路的链路释放方法，其中，根据所述连接释放请求消息，释放所述单播链路的步骤之后，还包括：向所述第二终端反馈连接释放完成的指示信息，所述指示信息用于指示所述第一终端释放单播链路。
- 根据权利要求5所述的旁链路的链路释放方法，其中，所述连接释放完成的指示信息包括以下中的至少一项：物理层反馈信息，无线链路控制RLC层反馈信息，以及单播链路释放完成消息。
- 根据权利要求1所述的旁链路的链路释放方法，其中，根据所述连接释放请求消息，释放所述单播链路的步骤之后，还包括：接入AS层向上层通知所述单播链路释放。
- 根据权利要求1所述的旁链路的链路释放方法，其中，根据所述连接释放请求消息，释放所述单播链路的步骤之后，还包括：接入AS层发送或接收发现信号；或者，所述AS层在上层通知下发送或接收所述发现信号，所述上层通知是所述上层在所述AS层通知所述单播链路释放后发送的。
- 根据权利要求1所述的旁链路的链路释放方法，其中，接收第二终端发送的旁链路的单播链路的连接释放请求消息的步骤之前，还包括：向所述第二终端发送所述单播链路的连接建立请求消息，以建立与所述第二终端之间的单播链路；或者，接收所述第二终端发送的所述单播链路的连接建立请求消息，以建立与所述第二终端之间的单播链路。
- 一种旁链路的链路释放方法，应用于第二终端，包括：向第一终端发送旁链路的单播链路的连接释放请求消息。
- 根据权利要求10所述的旁链路的链路释放方法，其中，向第一终端发送旁链路的单播链路的连接释放请求消息的步骤，包括：在满足预设条件时，向所述第一终端发送旁链路的单播链路的连接释放请求消息。
- 根据权利要求11所述的旁链路的链路释放方法，其中，所述预设条件包括以下中的至少一项：接收到用于指示释放与所述第一终端之间单播链路的释放请求，所述释放请求是上层发送的；接入AS层确定释放与所述第一终端之间单播链路。
- 根据权利要求12所述的旁链路的链路释放方法，其中，所述释放请 求是所述上层根据所述AS层上报的辅助信息确定的；其中，所述辅助信息是基于事件触发上报的，或者所述辅助信息是周期性上报的。
- 根据权利要求13所述的旁链路的链路释放方法，其中，所述辅助信息包括：业务质量Qos，无线链路失败信息，信道质量信息，以及参考信号质量信息中的至少一项。
- 根据权利要求10所述的旁链路的链路释放方法，其中，所述连接释放请求消息包括以下信息中的至少一项：源标识，目的标识，用于指示单播链路的连接释放原因的原因值，以及传输发现信号的无线资源。
- 根据权利要求15所述的旁链路的链路释放方法，其中，所述连接释放原因包括以下中的至少一项：通过所述单播链路传输的数据包或数据流的QoS不满足预设门限条件，与所述第一终端之间的单播链路发生无线链路失败，所述单播链路的信道质量低于第二门限值，以及所述单播链路的参考信号质量低于第三门限值。
- 根据权利要求14或16所述的旁链路的链路释放方法，其中，所述QoS包括：业务优先级、时延、可靠性、通信距离、载荷大小、发送速率和数据速率中的至少一项。
- 根据权利要求10所述的旁链路的链路释放方法，其中，向第一终端发送旁链路的单播链路的连接释放请求消息的步骤之后，还包括：接收所述第一终端发送的连接释放完成的指示信息，所述指示信息用于指示所述第一终端释放所述单播链路。
- 根据权利要求18所述的旁链路的链路释放方法，其中，所述连接释放完成的指示信息包括以下中的至少一项：物理层反馈信息，无线链路控制RLC层反馈信息，以及单播链路释放完成消息。
- 根据权利要求18所述的旁链路的链路释放方法，其中，接收所述第一终端发送的连接释放完成的指示信息的步骤之后，还包括：接入AS层发送或接收发现信号；或者，所述AS层在上层通知下发送或接收所述发现信号，所述上层通知是所述上层在所述AS层通知所述单播链路释放后发送的。
- 根据权利要求10所述的旁链路的链路释放方法，其中，向第一终端发送旁链路的单播链路的连接释放请求消息的步骤之前，还包括：接收所述第一终端发送的所述单播链路的连接建立请求消息，以建立与所述第一终端之间的单播链路；或者，向所述第一终端发送所述单播链路的连接建立请求消息，以建立与所述第一终端之间的单播链路。
- 一种终端，包括：第一接收模块，用于接收第二终端发送的旁链路的单播链路的连接释放请求消息；链路释放模块，用于根据所述连接释放请求消息，释放所述单播链路。
- 根据权利要求22所述的终端，其中，所述连接释放请求消息包括以下信息中的至少一项：源标识，目的标识，用于指示单播链路的连接释放原因的原因值，以及传输发现信号的无线资源。
- 根据权利要求23所述的终端，其中，所述连接释放原因包括以下中的至少一项：通过所述单播链路传输的数据包或数据流业务质量QoS不满足预设门限条件，与所述第二终端之间的单播链路发生无线链路失败，所述单播链路的信道质量低于第二门限值，以及所述单播链路的参考信号质量低于第三门限值。
- 根据权利要求24所述的终端，其中，所述QoS包括：业务优先级、时延、可靠性、通信距离、载荷大小、发送速率和数据速率中的至少一项。
- 根据权利要求22所述的终端，还包括：反馈模块，用于向所述第二终端反馈连接释放完成的指示信息，所述指示信息用于指示第一终端释放单播链路。
- 根据权利要求26所述的终端，其中，所述连接释放完成的指示信息包括以下中的至少一项：物理层反馈信息，无线链路控制RLC层反馈信息，以及单播链路释放完成消息。
- 根据权利要求22所述的终端，还包括：通知模块，用于接入AS层向上层通知所述单播链路释放。
- 根据权利要求22所述的终端，还包括：第一传输模块，用于接入AS层发送或接收发现信号；或者，第二传输模块，用于所述AS层在上层通知下发送或接收所述发现信号，所述上层通知是所述上层在所述AS层通知所述单播链路释放后发送的。
- 根据权利要求22所述的终端，还包括：第二发送模块，用于向所述第二终端发送所述单播链路的连接建立请求消息，以建立与所述第二终端之间的单播链路；或者，第二接收模块，用于接收所述第二终端发送的所述单播链路的连接建立请求消息，以建立与所述第二终端之间的单播链路。
- 一种终端，包括：第一发送模块，用于向第一终端发送旁链路的单播链路的连接释放请求消息。
- 根据权利要求31所述的终端，其中，所述第一发送模块包括：发送单元，用于在满足预设条件时，向所述第一终端发送旁链路的单播链路的连接释放请求消息。
- 根据权利要求32所述的终端，其中，所述预设条件包括以下中的至少一项：接收到用于指示释放与所述第一终端之间单播链路的释放请求，所述释放请求是上层发送的；接入AS层确定释放与所述第一终端之间单播链路。
- 根据权利要求33所述的终端，其中，所述释放请求是所述上层根据所述AS层上报的辅助信息确定的；其中，所述辅助信息是基于事件触发上报的，或者所述辅助信息是周期性上报。
- 根据权利要求34所述的终端，其中，所述辅助信息包括：业务质量Qos信息，无线链路失败信息，信道质量信息，以及参考信号质量信息中的至少一项。
- 根据权利要求31所述的终端，其中，所述连接释放请求消息包括以下信息中的至少一项：源标识，目的标识，用于指示单播链路的连接释放原因的原因值，以及传输发现信号的无线资源。
- 根据权利要求36所述的终端，其中，所述连接释放原因包括以下中的至少一项：通过所述单播链路传输的数据包或数据流的QoS不满足预设门限条件，与所述第一终端之间的单播链路发生无线链路失败，所述单播链路的信道质量低于第二门限值，以及所述单播链路的参考信号质量低于第三门限值。
- 根据权利要求35或37所述的终端，其中，所述QoS包括：业务优先级、时延、可靠性、通信距离、载荷大小、发送速率和数据速率中的至少一项。
- 根据权利要求31所述的终端，还包括：第三接收模块，用于接收所述第一终端发送的连接释放完成的指示信息，所述指示信息用于指示所述第一终端释放所述单播链路。
- 根据权利要求39所述的终端，其中，所述连接释放完成的指示信息包括以下中的至少一项：物理层反馈信息，无线链路控制RLC层反馈信息，以及单播链路释放完成消息。
- 根据权利要求39所述的终端，还包括：第三传输模块，用于接入AS层发送或接收发现信号；或者，第四传输模块，用于所述AS层在上层通知下发送或接收所述发现信号，所述上层通知是所述上层在所述AS层通知所述单播链路释放后发送的。
- 根据权利要求31所述的终端，还包括：第四接收模块，用于接收所述第一终端发送的所述单播链路的连接建立请求消息，以建立与所述第一终端之间的单播链路；或者，第三发送模块，用于向所述第一终端发送所述单播链路的连接建立请求消息，以建立与所述第一终端之间的单播链路。
- 一种终端，其中，所述终端包括处理器、存储器以及存储于所述存储器上并在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1至9中任一项或者实现10至21中任一项所述的旁链路的链路释放方法的步骤。
- 一种计算机可读存储介质，其中，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1至9中任一项或者实现10至21中任一项所述的旁链路的链路释放方法的步骤。
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| CN115380621B (zh) | 2020-04-09 | 2025-04-04 | 中兴通讯股份有限公司 | 无线侧链路通信中资源分配和释放的方法和设备 |
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