WO2021204085A1 - 一种侧行链路通信方法、装置及系统 - Google Patents

一种侧行链路通信方法、装置及系统 Download PDF

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Publication number
WO2021204085A1
WO2021204085A1 PCT/CN2021/085315 CN2021085315W WO2021204085A1 WO 2021204085 A1 WO2021204085 A1 WO 2021204085A1 CN 2021085315 W CN2021085315 W CN 2021085315W WO 2021204085 A1 WO2021204085 A1 WO 2021204085A1
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WIPO (PCT)
Prior art keywords
terminal device
mac pdu
harq feedback
side link
resource
Prior art date
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PCT/CN2021/085315
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English (en)
French (fr)
Inventor
赵力
魏冬冬
肖潇
彭文杰
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP21783949.7A priority Critical patent/EP4120603A4/en
Priority to BR112022020455A priority patent/BR112022020455A2/pt
Publication of WO2021204085A1 publication Critical patent/WO2021204085A1/zh
Priority to US17/937,305 priority patent/US12549315B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055Physical resource allocation for ACK/NACK
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1861Physical mapping arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/21Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1854Scheduling and prioritising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/16Interfaces between hierarchically similar devices
    • H04W92/18Interfaces between hierarchically similar devices between terminal devices

Definitions

  • This application relates to the field of communication, and in particular to a side link communication method, device and system.
  • one resource pool is a segment A collection of time-frequency resources.
  • the resources for the UE to communicate on the SL are determined from the resource pool configured on the network side.
  • the TX UE When the sending end UE (TX UE) performs initial transmission on the side link grant (sl grant), the TX UE sends the medium access control layer packet data unit (MAC PDU), if the TX UE is configured Physical uplink control channel (PUCCH) resources and the sl grant has associated physical sidelink feedback channel (PSFCH) resources, but the hybrid automatic repeat request (hybrid automatic) of MAC PDU
  • MAC PDU medium access control layer packet data unit
  • PUCCH Physical uplink control channel
  • PSFCH physical sidelink feedback channel
  • HARQ hybrid automatic repeat request
  • the retransmission request (HARQ) feedback attribute is disable, and the lack of HARQ information feedback on the PUCCH will cause unnecessary retransmissions and waste resources.
  • This application provides a side link communication method, device and system to avoid unnecessary retransmissions and save resources.
  • this application provides a sidelink communication method, the method includes: if the first terminal device determines that the HARQ feedback attribute of the logical channel (logic channel, LCH) in the MAC PDU is disabled, And the network side device configures the PUCCH resource for the first terminal device and the sl grant for sending MAC PDU is configured with the associated PSFCH resource, then the first terminal device may send a first request message to the second terminal device to request the first terminal device Second, the terminal device performs HARQ feedback on the MAC PDU.
  • the method includes: if the first terminal device determines that the HARQ feedback attribute of the logical channel (logic channel, LCH) in the MAC PDU is disabled, And the network side device configures the PUCCH resource for the first terminal device and the sl grant for sending MAC PDU is configured with the associated PSFCH resource, then the first terminal device may send a first request message to the second terminal device to request the first terminal device Second, the terminal device performs HARQ feedback on the MAC PDU.
  • the MAC PDU is the initial transmission on the sl grant, that is, the MAC PDU is the new data transmitted by the first terminal device on the sl grant.
  • the network side device configures the first terminal device with PUCCH resources and is associated with the above sl grant PSFCH resources, then, the first terminal device can request the second terminal device to perform HARQ feedback on this MAC PDU. In this way, unnecessary retransmissions are avoided and resources are saved. .
  • the first request message may include: control information; correspondingly, the above method may further include: the first terminal device configures the HARQ feedback attribute in the control information to be enabled.
  • the HARQ feedback attribute may be indicated by one or more bits in the control information. Then, the first terminal device sets the bit used to indicate the HARQ feedback attribute in the control information to enable.
  • control information may be sidelink control information (SCI), that is, the first terminal device sends the SCI to the second terminal device to request The second terminal device performs HARQ feedback on the MAC PDU.
  • SCI sidelink control information
  • the above method may further include: the first terminal device receives the HARQ feedback information sent by the second terminal device, that is, the response message of the second terminal device to the first request information; if HARQ If the feedback information is acknowledgement information (ACK), the first terminal device sends the acknowledgement information to the network side device on the PUCCH resource; or, if the HARQ feedback information is negative acknowledgement information, the first terminal device sends the acknowledgement information to the network on the PUCCH resource.
  • the side device sends a negative response message, thus avoiding unnecessary retransmissions and saving resources.
  • the present application provides a sidelink communication method.
  • the method includes: a second terminal device receives a first request message; the second terminal device responds to the first request message and performs HARQ feedback on the MAC PDU on the PSFCH.
  • the second terminal device responds to the first request message and performs HARQ feedback on the MAC PDU on the PSFCH including: the second terminal device responds to the first request message and sends to the first terminal device HARQ feedback information.
  • the first request message may include: control information; further, the above control information may be SCI, that is, the second terminal device receives the SCI from the second terminal device, And according to the SCI to the first terminal device to perform HARQ feedback on the MAC PDU.
  • control information may be SCI, that is, the second terminal device receives the SCI from the second terminal device, And according to the SCI to the first terminal device to perform HARQ feedback on the MAC PDU.
  • this application provides a sidelink communication method, the method includes: if the first terminal device determines that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl used to send the MAC PDU If grant does not configure the associated PSFCH resource, the first terminal device ignores the sl grant.
  • the above MAC PDU is the initial transmission on the above sl grant.
  • the LCH in the MAC PDU sent by the first terminal device on the sl grant supports HARQ feedback, it means that the MAC PDU is expected to perform HARQ feedback, but the sl grant is not configured with the associated PSFCH resource.
  • the first terminal device ignores the sl grant to avoid the HARQ feedback attributes of the MAC PDU from mismatching the resources configured by the UE, thereby avoiding unnecessary retransmissions or lack of retransmissions. Packet loss.
  • the first terminal device ignores the sidelink authorization, including: the first terminal device does not send the MAC PDU to the third terminal device through the sl grant.
  • this application provides a side link communication method, the method includes: if the first terminal device determines that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured Associated PSFCH resources, the first terminal device sends a second request message to the network side device, and the second request message is used to request the network side device to allocate PSFCH resources.
  • the above MAC PDU is the initial transmission on the sl grant.
  • the first terminal device requests the network side device to allocate PSFCH resources, so that the second terminal device can perform HARQ feedback on the MAC PDU on the newly configured PSFCH resources to avoid the HARQ feedback attributes of the MAC PDU and the UE configured resources do not match , Thereby avoiding unnecessary retransmission or packet loss due to lack of retransmission.
  • the second request message may include the HARQ feedback attribute of the MAC PDU; the first terminal device sends the second request message to the network side device, including: the first terminal device sends the network side device Send the HARQ feedback attributes of the MAC PDU.
  • the second request message may include MAC control element (CE) or radio resource control (radio resource control, RRC) signaling.
  • CE MAC control element
  • RRC radio resource control
  • other signaling may also be included, which is not specifically limited in the embodiment of the present application.
  • the second request message directly instructs the network-side device to allocate PSFCH resources in the form of signaling, and can also indicate the HARQ feedback attribute of the MAC PDU in the form of signaling, so that the network-side device can according to the HARQ feedback attribute of the MAC PDU Allocate PSFCH resources.
  • the second request message is used to request the network side device to reconfigure the PSFCH resource associated with the sl Grant; or, the second request message is used to request the network side device to re-allocate the resource pool,
  • the re-allocated resource pool is configured with PSFCH resources, that is, the first terminal device can request the network side device to allocate PSFCH resources for the current resource pool, so that the PSFCH resources associated with the sl grant configuration used to transmit MAC PDUs, or, The first terminal device can request the network-side device to reselect a new resource pool for the first terminal device.
  • the new resource pool is configured with PSFCH resources, and the sl grant used to transmit MAC PDUs can also be configured with associated PSFCH resources, and then The second terminal device may perform HARQ feedback on the MAC PDU on the newly configured PSFCH resource.
  • the present application provides a sidelink communication method.
  • the method includes: a network-side device receives a second request message from a first terminal device; and the network-side device responds to the second request message to allocate to the first terminal device PSFCH resources.
  • the second request message may include the HARQ feedback attribute of the MAC PDU; the network side device receiving the second request message from the first terminal device includes: the network side device receives the HARQ feedback attribute from the first terminal device.
  • the HARQ feedback attribute of the MAC PDU of the terminal device may include the HARQ feedback attribute of the MAC PDU;
  • the second request message may include MA CE or RRC signaling.
  • other signaling may also be included, which is not specifically limited in the embodiment of the present application.
  • the second request message directly instructs the network-side device to allocate PSFCH resources in the form of signaling, and can also indicate the HARQ feedback attribute of the MAC PDU in the form of signaling, so that the network-side device can according to the HARQ feedback attribute of the MAC PDU Allocate PSFCH resources.
  • the second request message is used to request the network side device to reconfigure the PSFCH resource associated with the sl Grant; or, the second request message is used to request the network side device to re-allocate the resource pool,
  • the re-allocated resource pool is configured with PSFCH resources, that is, the first terminal device can request the network side device to allocate PSFCH resources for the current resource pool, so that the PSFCH resources associated with the sl grant configuration used to transmit MAC PDUs, or, The first terminal device can request the network-side device to reselect a new resource pool for the first terminal device.
  • the new resource pool is configured with PSFCH resources, and the sl grant used to transmit MAC PDUs can also be configured with associated PSFCH resources, and then The second terminal device may perform HARQ feedback on the MAC PDU on the newly configured PSFCH resource.
  • the present application provides a sidelink communication method.
  • the method includes: if the HARQ feedback attribute of at least one LCH configured by the network-side device for the first terminal device is enabled, then the network-side device is the first terminal The device is configured with a resource pool, and at least one resource pool in the configured resource pool is configured with PSFCH resources.
  • the network side device when the network side device configures resources for the first terminal device, if the configured LCH supports HARQ feedback, it needs to configure PSFCH resources for the first terminal device accordingly, that is, the network side device configures the first terminal device Resource pool, at least one resource pool in the configured resource pool is configured with PSFCH resources. Then, the second terminal device can perform HARQ feedback on the MAC PDU on the configured PSFCH resource to avoid the HARQ feedback attributes of the MAC PDU from mismatching the resources configured by the UE, thereby avoiding unnecessary retransmission or lack of retransmission. Lead to packet loss.
  • the resource pool is correspondingly configured with PSFCH resources. If the network side device configures multiple resource pools for the first terminal device, then multiple resource pools are configured for the first terminal device. At least one resource pool in the resource pool is correspondingly configured with PSFCH resources. In this way, it can be realized that the first terminal device configures the LCH that supports HARQ feedback and has corresponding PSFCH resources. Corresponding can also be understood as corresponding, or can be understood as having an association relationship.
  • this application provides a side link communication method, the method includes: if the first terminal device determines that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured Associated PSFCH resources, the first terminal device enters an idle state or a third (inactive) state, and performs resource reselection, and the reselected resource pool is configured with PSFCH resources.
  • the above MAC PDU is the initial transmission on the above sl grant.
  • the LCH in the MAC PDU sent by the first terminal device on the sl grant supports HARQ feedback, it means that the MAC PDU is expected to perform HARQ feedback, but the sl grant is not configured with the associated PSFCH resource.
  • the first terminal device can be in the idle state or the third state to perform resource reselection, so that the reselected resource pool is configured with PSFCH resources.
  • the second terminal device can use the reselected PSFCH resource for the MAC PDU Perform HARQ feedback to avoid mismatch between the HARQ feedback attributes of the MAC PDU and the resources configured by the UE, thereby avoiding unnecessary retransmissions or packet loss due to lack of retransmissions.
  • the above method further includes: after the first terminal device enters the idle state or the third state, switching to the side link mode 2
  • this application provides a side link communication method, the method includes: if the first terminal device determines that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured For the associated PSFCH resource, the first terminal device selects DST again.
  • the above MAC PDU is the initial transmission on the above sl grant.
  • the LCH in the MAC PDU sent by the first terminal device on the sl grant supports HARQ feedback, it means that the MAC PDU is expected to perform HARQ feedback, but the sl grant is not configured with the associated PSFCH resource.
  • the first terminal device may reselect DST, and the LCH associated with the reselected DST may not support HARQ feedback.
  • the HARQ feedback attribute of the MAC PDU and the resource configured by the UE may not match, thereby avoiding unnecessary Retransmission or packet loss due to lack of retransmission.
  • DST is the DST determined according to the LCH or MAC CE
  • the LCH or MAC CE is the one with the highest priority among multiple LCHs or MAC CEs that meet the preset conditions; the preset conditions are at least Including: the HARQ feedback attribute of multiple LCH or MAC CE is disabled.
  • this application provides a sidelink communication method, the method includes: if the first terminal device determines that the HARQ feedback attribute of the LCH in the MAC PDU is enable, and the sl grant used to send the MAC PDU is not Configure the associated PSFCH resource, the first terminal device sends a third request message to the second terminal device, and the third request message is used to request the second terminal device not to perform HARQ feedback on the MAC PDU.
  • the above MAC PDU is the initial transmission on the above sl grant.
  • the third request message may include: control information; correspondingly, the above method may further include: the first terminal device configures the HARQ feedback attribute in the control information to be disabled.
  • the HARQ feedback attribute may be indicated by one or more bits in the control information. Then, the first terminal device sets the bit used to indicate the HARQ feedback attribute in the control information to disable.
  • the first terminal device requests the second terminal device not to perform HARQ feedback on the MAC PDU to avoid the HARQ feedback attributes of the MAC PDU from mismatching the resources configured by the UE, thereby avoiding unnecessary retransmissions or loss due to lack of retransmissions. Bag.
  • this application provides a sidelink communication method, the method includes: a second terminal device receives a third request message sent by a first terminal device, and the third request message is used to request the second terminal device not to respond to MAC PDUs. Perform HARQ feedback; the second terminal device responds to the third request information and does not perform HARQ feedback on the MAC PDU.
  • the third request message may include: control information; the HARQ feedback attribute in the control information is configured to be disabled.
  • the present application provides a communication device.
  • the communication device may be a chip or a system-on-chip in a first terminal device, and may also be used in the first terminal device to implement the above-mentioned first aspect or any one of its possibilities.
  • the communication device may include: a sending module and a processing module; the sending module is used if the processing module determines that the HARQ feedback attribute of the LCH in the MAC PDU is disabled, and the network side device configures the first terminal device with PUCCH resources and If the sl grant that sends the MAC PDU has been configured with the associated PSFCH resource, the first request message is sent to the second terminal device.
  • the first request message is used to request the second terminal device to perform HARQ feedback on the MAC PDU.
  • the second terminal device performs sidelink communication, and the MAC PDU is the initial transmission on the sl grant.
  • the first request message includes: control information; and a processing module, which is further configured to configure the HARQ feedback attribute in the control information to be enabled.
  • control information is SCI.
  • the communication device further includes: a receiving module for receiving HARQ feedback information sent by the second terminal device; a sending module for receiving the HARQ feedback information if the HARQ feedback information is affirmative response information, Then send the positive response information on the PUCCH resource; or, if the HARQ feedback information is negative response information, send the negative response information on the PUCCH resource.
  • the present application provides a communication device.
  • the communication device may be a chip or a system on a chip in a first terminal device, and may also be used in the first terminal device to implement the second aspect or any one of its possibilities.
  • the communication device may include: a sending module and a processing module; the sending module is used if the processing module determines that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured with associated PSFCH resources, Ignore sl grant, MAC PDU is the initial transmission on sl grant.
  • the sending module is specifically configured to send a MAC PDU to the second terminal device without slgrant.
  • the processing module is also used to determine if the HARQ feedback attribute of the LCH to be packaged is enabled before the package is grouped, and is used to send the sl of the MAC PDU Grant does not configure the associated PSFCH resource, then does not generate the corresponding MAC PDU for the sl grant; or, the processing module is also used to determine DST according to the priority of the LCH, if the HARQ attribute of the highest priority LCH is enabled , Stop continuing to filter LCH.
  • the present application provides a communication device.
  • the communication device may be a chip or a system-on-chip in the first terminal device, and may also be used in the first terminal device to implement the above-mentioned third aspect or any one of its possibilities.
  • the functional module of the implementation method may be a chip or a system-on-chip in the first terminal device, and may also be used in the first terminal device to implement the above-mentioned third aspect or any one of its possibilities.
  • the communication device may include: a sending module and a processing module; the sending module is used if the processing module determines that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured with associated PSFCH resources, Then, a second request message is sent to the network side device, the second request message is used to request the allocation of PSFCH resources for the first terminal device, and the MAC PDU is the initial transmission on the sl grant.
  • the second request message includes the HARQ feedback attribute of the MAC PDU; the sending module is specifically configured to send the HARQ feedback attribute of the MAC PDU to the network side device.
  • the second request message includes MAC control unit CE or radio resource control RRC signaling.
  • the second request message is used to request the network side device to allocate PSFCH resources associated with sl Grant; or, the second request message is used to request the network side device to reallocate the resource pool,
  • the resource pool is configured with PSFCH resources.
  • the present application provides a communication device.
  • the communication device may be a chip or a system-on-chip in a network-side device, and may also be a first terminal device for implementing the fourth aspect or any possible implementation thereof.
  • the communication device may include: a processing module configured to configure a resource pool for the first terminal device if the HARQ feedback attribute of the at least one LCH configured for the first terminal device is enabled, and at least one resource pool in the resource pool is configured with PSFCH resources.
  • the present application provides a communication device.
  • the communication device may be a chip or a system-on-chip in the first terminal device, and may also be used in the first terminal device to implement the above-mentioned fifth aspect or any one of its possibilities.
  • the communication device may include: a processing unit configured to enter the idle state or the third state if it is determined that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to transmit the MAC PDU is not configured with the associated PSFCH resource , And perform resource reselection, the reselected resource pool is configured with PSFCH resources, and the MAC PDU is the initial transmission on the grant.
  • the processing unit is also used to switch to the side link mode 2 after entering the idle state or the third state.
  • the present application provides a communication device.
  • the communication device may be a chip or a system-on-chip in the first terminal device, and may also be used in the first terminal device to implement the above-mentioned sixth aspect or any one of its possibilities.
  • the communication device may include: a processing unit for reselecting the communication target DST, if it is determined that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured with the associated PSFCH resource, then reselecting the communication target DST, MAC PDU is the initial transmission on sl grant.
  • DST is DST determined according to LCH or MAC CE
  • LCH or MAC CE is the one with the highest priority among multiple LCHs or MAC CEs that meet preset conditions; preset conditions At least including: the HARQ feedback attributes of multiple LCHs or MAC CEs are disabled.
  • the present application provides a communication device.
  • the communication device may be a chip or a system-on-chip in the first terminal device, and may also be used in the first terminal device to implement the seventh aspect or any one of its possibilities.
  • the communication device may include: a sending unit and a processing unit; the sending unit is used for sending the MAC PDU without configuring the associated PSFCH resource if the processing unit determines that the HARQ feedback attribute of the LCH in the MAC PDU is enable,
  • the second terminal device sends a third request message, and the third request message is used to request the second terminal device not to perform HARQ feedback on the MAC PDU.
  • the third request message may include: control information; correspondingly, the processing unit is further configured to configure the HARQ feedback attribute in the control information to be disabled.
  • the present application provides a communication device, including: a processor and a memory; the processor is coupled to the memory, and the processor is configured to read and execute instructions in the memory to implement the above-mentioned first to tenth aspects. Aspect or any one of its possible implementation manners of the side link communication method.
  • the present application provides a communication device, including: a processor and a memory; the processor is coupled to the memory, and the processor is configured to read and execute instructions in the memory to implement the fourth to sixth aspects as described above. Aspect or any one of its possible implementation manners of the side link communication method information.
  • the present application provides a sidelink communication system, including: the first terminal device and the second terminal device as described in the first aspect to the tenth aspect or any one of its possible implementation manners, the first One terminal device performs side-link communication with the second terminal device.
  • the present application provides a sidelink communication system, including: the first terminal device and the second terminal device as described in the first aspect to the tenth aspect or any possible implementation manner thereof, And the network side device as described in the foregoing fourth aspect to sixth aspect or any one of its possible implementation manners.
  • the present application provides a computer-readable storage medium.
  • the computer-readable storage medium stores instructions. When the instructions are run on a computer, they are used to execute the above-mentioned first to tenth aspects or any one of them.
  • this application provides a computer program or computer program product, which when the computer program or computer program product is executed on a computer, enables the computer to implement the aforementioned first to tenth aspects or any of the possible The side link communication method described in the implementation mode.
  • Fig. 1 is a schematic diagram of an SL communication system in an embodiment of the application
  • FIG. 2 is a first schematic flowchart of a side link communication method in an embodiment of this application
  • FIG. 3 is a second schematic flowchart of a side link communication method in an embodiment of this application.
  • FIG. 4 is a third schematic flowchart of a side link communication method in an embodiment of this application.
  • FIG. 5 is a fourth schematic flowchart of a side link communication method in an embodiment of this application.
  • FIG. 6 is a fifth schematic flowchart of a side link communication method in an embodiment of this application.
  • FIG. 7 is a sixth schematic flowchart of a side link communication method in an embodiment of this application.
  • FIG. 8 is a seventh schematic flowchart of a side link communication method in an embodiment of this application.
  • FIG. 9 is a first structural diagram of a communication device in an embodiment of this application.
  • FIG. 10 is a second structural diagram of a communication device in an embodiment of this application.
  • the corresponding device may include one or more units such as functional units to perform the described one or more method steps (for example, one unit performs one or more steps). , Or multiple units, each of which performs one or more of multiple steps), even if such one or more units are not explicitly described or illustrated in the drawings.
  • the corresponding method may include one step to perform the functionality of one or more units (for example, one step performs one or more units). The functionality, or multiple steps, each of which performs the functionality of one or more of the multiple units), even if such one or more steps are not explicitly described or illustrated in the drawings.
  • FIG. 1 is a schematic diagram of an SL communication system in an embodiment of this application.
  • the SL system 100 may include: a network side device 101 and a terminal device 102. While the terminal device communicates with the network side device, it can also communicate with other terminal devices.
  • the network side device can perform resource configuration, scheduling, coordination, etc. on the sidelink of the communication between the terminal devices, and assist the direct communication between the terminal devices.
  • the terminal device may also perform resource configuration, scheduling, coordination, etc., on the side link of communication between other terminal devices by itself, which is not specifically limited in the embodiment of the present application.
  • the above-mentioned network-side device may be a device used on the access network side to support terminal access to the wireless communication system.
  • it may be the next-generation base station (gNB, next generation NodeB) and the transmit-receive point (TRP) in the 5G access technology communication system.
  • TRP transmit-receive point
  • Transmission Reception Point may be the next-generation base station (gNB, next generation NodeB) and the transmit-receive point (TRP) in the 5G access technology communication system.
  • Transmission Reception Point Transmission Reception Point
  • Relay Node Relay Node
  • Access Point AP, Access Point
  • RSU Road Site Unit
  • the above-mentioned terminal device may be a device that provides voice or data connectivity to users, for example, it may also be called UE, mobile station, subscriber unit, station (STAtion), or terminal (TE, Terminal Equipment). )Wait.
  • the terminal device can be a cellular phone (cellular phone), personal digital assistant (PDA, Personal Digital Assistant), wireless modem (modem), handheld device (handheld), laptop computer (laptop computer), cordless phone (cordless phone), Wireless Local Loop (WLL, Wireless Local Loop) station or tablet computer (pad), etc.
  • devices that can access the wireless communication system, communicate with the network side of the wireless communication system, or communicate with other devices through the wireless communication system can all be terminal devices in the embodiments of the present application.
  • the terminal equipment can be statically fixed or mobile.
  • network-side equipment such as a base station, configures a resource pool for UE's SL communication, and a resource pool is a collection of time-frequency resources.
  • the resources for the UE to communicate on the SL link are determined from a pre-configured or a resource pool configured on the base station side.
  • the Tx UE determines from the resource pool that there are two modes of transmission resources for communication on the SL link, namely mode1 and mode2.
  • the foregoing pre-configured resources may be obtained from a network element of the core network, or may be preset in the UE.
  • the base station allocates SL transmission resources for Tx UE through scheduling.
  • the Tx UE when the Tx UE has SL to transmit data, it reports the SL buffer status report (buffer status report, BSR) MAC CE to the base station through the Uu port to inform the base station of the current Tx UE's data to be transmitted on the PC5 port. quantity.
  • the base station can dynamically allocate transmission resources for the Tx UE.
  • the UE selects transmission resources from the resource pool pre-configured or configured by the base station as needed, without the base station for scheduling.
  • the SL resource determined by the UE is configured by the base station (for example, configured through RRC signaling or system information block (system information block, SIB) configuration), or pre-configured.
  • the pre-configuration mentioned here may be obtained from the network element of the core network, or may be preset in the UE.
  • the UE When the uplink radio resources are allocated based on the sl grant, the UE needs to determine the total amount of data of each LCH included in the newly transmitted MAC PDU, and if necessary, the UE also allocates resources for the MAC CE. That is to say, the uplink resource allocated to a UE by the network side device through sl grant is determined. The UE decides which LCH data to place and the logic of each LCH based on the configured LCH attributes and the rules stipulated by the existing protocol. How much data the channel puts in the MAC PDU.
  • the TX UE when the TX UE transmits new data on the sl grant, if the TX UE establishes a connection with multiple RX UEs at the same time, and the LCH with data belongs to different DST, then the TX UE first needs to determine the sl grant Which DST is used to communicate with. For this sl grant, the TX UE selects the LCH or MAC CE with the highest priority (ie, the first LCH or the first MAC CE) among the LCH or MAC CE that meets the following first conditions. An LCH or the first MAC CE determines the DST of the communication.
  • the above-mentioned first condition may include:
  • configured grant type1 is used to indicate side link configuration authorization type 1;
  • sl-configuredSLGrantType1Allowed is used to indicate whether the data of the LCH can be transmitted on the resources of sidelink configuration authorization type 1.
  • the UE uses an algorithm similar to a token bucket to implement MAC PDU encapsulation.
  • the UE determines whether to send data of a certain LCH based on whether there are tokens in the token bucket and the number of tokens, and controls the amount of data of the logical channel encapsulated in the MAC PDU.
  • the UE maintains a variable SB j for the jth LCH. j is an integer greater than or equal to 1 and less than or equal to the number of tokens in the token bucket. SB j indicates the number of tokens currently available in the token bucket, and each token Corresponds to 1Byte of data. SB j is initialized to 0 when the LCH is established, and each T is increased by sPBR ⁇ T, where T is the elapsed time since SB j was increased last time. The value of SB j cannot exceed the maximum capacity of the token bucket.
  • the TX UE needs to filter out the first LCH that meets the following second condition among the first LCH associated with this DST. Then, the TX UE selects all the first LCHs Resource allocation in an LCH.
  • the above-mentioned second condition may include:
  • the HARQ feedback attribute of the LCH is the same as the HARQ feedback attribute of the first LCH.
  • the TX UE encapsulates the data of the LCH that belongs to the same source and destination pair and has the same HARQ attribute in one MAC PDU.
  • the network side device when the network side device configures a resource pool for the UE, the network side device configures the physical sidelink shared channel (PSSCH) resource for the UE, and the UE transmits on the PSSCH resource data.
  • PSSCH physical sidelink shared channel
  • the RX UE After the RX UE receives the data sent by the TX UE through the PSSCH, it can feed back HARQ response messages (such as acknowledgement messages (ACK) or negative acknowledge messages (NACK)) on the PSFCH resource.
  • HARQ response messages such as acknowledgement messages (ACK) or negative acknowledge messages (NACK)
  • the network side device is configuring the resource pool
  • PSFCH resources may be configured for the resource pool, or PSFCH resources may not be configured for the resource pool. If the network side configures PSFCH resources for the resource pool, each sl grant in the resource pool has an associated PSFCH resource. Conversely, if the network side does not configure PSFCH resources for the resource pool, then every sl grant in the resource pool has an associated PSFCH resource. There is no associated PSFCH resource.
  • the network side device when the network side device configures the UE with the LCH that can be used for SL communication, it can configure the HARQ attributes of the SL LCH through the sl-HARQ-feedback-enable field, where the HARQ attributes of the SL LCH are per UE . If it is configured as enable, it means that this SL LCH supports HARQ feedback. If it is configured as disable, it means that this SL LCH does not support HARQ feedback.
  • the RX UE will not send HARQ feedback to the TX UE, and the TX UE will not be able to perform HARQ on the PUCCH resource to the network side.
  • the feedback causes the network side to believe that the TX UE has not received any HARQ feedback, and then believes that the RX UE side has failed to decode, thus frequently scheduling retransmissions for the RX UE, which wastes resources.
  • the HARQ feedback attribute of the MAC PDU does not match the resources configured by the UE, which will cause unnecessary retransmissions Or packet loss due to lack of retransmission.
  • the embodiment of the present application provides a side-link communication method, which can be applied to the above-mentioned side-link communication system, and the above-mentioned UE may include a first terminal device and a second terminal device.
  • the first terminal device may be used as the transmitting end device (ie, TX UE), and the second terminal device may be used as the receiving end device (ie, RX UE).
  • the network-side device configures the resource pool for the TX UE can be divided into configured PSFCH resources and unconfigured PSFCH resources, the following describes the above-mentioned side-link communication methods separately based on the above two situations.
  • the network side device configures the PSFCH resource for the TX UE configuration resource pool, then the sl grant used to send the MAC PDU has been configured with the associated PSFCH resource.
  • FIG. 2 is a schematic flowchart 1 of the side link communication method in an embodiment of this application. As shown in FIG. 2, the method may include:
  • the first terminal device may send the first request message to the second terminal device;
  • the first request information is used to request the second terminal device to perform HARQ feedback on the MAC PDU. That is, the first terminal device requests the second terminal to perform HARQ feedback on the MAC PDU through the first request information.
  • the second terminal device sends HARQ feedback information to the first terminal device in response to the first request message.
  • the response of the second terminal device to the first request message can be understood as that the second terminal device performs HARQ feedback on the MAC PDU after receiving the MAC PDU according to the first request message.
  • the first terminal device After the first terminal device performs MAC PDU grouping through the above method, it can determine the HARQ feedback attribute of each LCH in the MAC PDU. If the HARQ feedback attribute of these LCHs is disabled, and the network side device configures the first terminal device with The PUCCH resource and the sl grant used to send the MAC PDU have been configured with the associated PSFCH resource. Then, the first terminal device can request the second terminal device to perform HARQ feedback on the MAC PDU through the first request message, and the second terminal device is in After receiving the first request message, in response to the first request message, HARQ feedback information, such as an ACK message or a NACK message, is sent to the first terminal device on the PSFCH resource. The first terminal device receives the HARQ feedback information. Then, the first terminal device sends a response message to the network side device on the PUCCH resource according to the received HARQ feedback information.
  • HARQ feedback information such as an ACK message or a NACK message
  • the MAC PDU described in the embodiment of this application is the initial transmission on the sl grant, that is, the newly transmitted data on the sl grant, which will not be repeated in the following embodiments.
  • the first request message may but is not limited to include: control information.
  • the control information may be the SCI corresponding to the above newly transmitted MAC PDU.
  • the foregoing method may include: the first terminal device configures the HARQ feedback attribute in the control information to be enabled. That is, the first terminal device may configure one or more bits (bits) used to indicate the HARQ feedback attribute in the control information to be enabled. Then, after receiving the control information, the second terminal device can perform HARQ feedback on the corresponding MAC PDU according to the bits.
  • the bit used to indicate the HARQ feedback attribute in the control information can be set to 0 to indicate disable. It is easy to understand that the bit can also be set to 1 to indicate enable.
  • the bits used to represent the HARQ feedback attribute in the control information may also have other representation methods, which are not specifically limited in the embodiment of the present application.
  • the network side device when the network side device configures resources for the TX UE, it also configures corresponding PUCCH resources, so that the TX UE can perform HARQ feedback to the network side device on the PUCCH resources.
  • the above method may further include: the first terminal device receives the HARQ feedback information sent by the second terminal device, that is, the response message of the second terminal device to the first request information; if the HARQ feedback information is ACK, the first terminal device Send an ACK to the network-side device on the PUCCH resource; or, if the HARQ feedback information is NACK, the first terminal device sends a NACK to the network-side device on the PUCCH resource.
  • the network side device receives the response message sent by the first terminal device, it will not frequently schedule retransmissions for the RX UE, saving resources.
  • the network-side device configures the resource pool for the TX UE and does not configure the PSFCH resource, then the sl grant used to send the MAC PDU is not configured with the associated PSFCH resource.
  • the HARQ feedback attribute of the LCH in the MAC PDU is enable, because there is no PSFCH resource, there will be a mismatch between the HARQ feedback attribute of the MAC PDU and the resource configured by the UE, which will cause unnecessary retransmission or lack of retransmission Which leads to packet loss.
  • FIG. 3 is a schematic diagram of the second flow of the side link communication method in an embodiment of this application. As shown in FIG. 3, the method may include:
  • the first terminal device determines that the HARQ feedback attribute of the LCH in the MAC PDU is enable, and the sl grant used to send the MAC PDU is not configured with associated PSFCH resources;
  • S302 The first terminal device ignores the sl grant.
  • the first terminal device can determine the HARQ feedback attribute of each LCH in the MAC PDU by performing the MAC PDU grouping by the above method. If the LCH in the MAC PDU sent by the first terminal device on the sl grant supports HARQ feedback, It means that the MAC PDU is expected to perform HARQ feedback, but the sl grant is not configured with the associated PSFCH resource. At this time, the first terminal device ignores the sl grant to avoid the HARQ feedback attribute of the MAC PDU and the resource configured by the UE. , Thereby avoiding unnecessary retransmission or packet loss due to lack of retransmission.
  • S301 may include: the first terminal device does not send the MAC PDU to the second terminal device through slgrant.
  • the multiplexing and assembly entity (multiplexing and assembly) in the first terminal device encapsulates the data of the LCH belonging to the same source and destination pair and having the same HARQ attributes in one MAC PDU, the data in the first terminal The MAC entity may not send the MAC PDU to the second terminal device through the slgrant.
  • the first terminal device may also ignore the sl grant before the MAC PDU packet is grouped. Then, if the first terminal device determines that the HARQ feedback attribute of the LCH to be encapsulated is enable, and the sl grant used for transmission is not configured with the associated PSFCH resource, the first terminal device can ignore the sl grant, that is, multiplexing and assembly The entity does not generate the corresponding MAC PDU for the sl grant; or, when the first terminal device determines DST according to the priority of the LCH, if the HARQ attribute of the highest priority LCH is enable, the multiplexing and assembling entity stops continuing to filter the LCH .
  • Fig. 4 is a third schematic flow chart of the side link communication method in an embodiment of this application. As shown in Fig. 4, the method may include:
  • the first terminal device determines that the HARQ feedback attribute of the LCH in the MAC PDU is enable, and the sl grant used to send the MAC PDU is not configured with the associated PSFCH resource, the first terminal device sends a second request message to the network side device ;
  • the second request message is used to request to allocate PSFCH resources to the terminal device (the first terminal device and/or the second terminal device). That is, the first terminal device requests the network-side device for the PSFCH resource associated with the sl grant used to send the MAC PDU through the second request information.
  • S402 The network side device allocates PSFCH resources in response to the second request message.
  • the first terminal device can determine the HARQ feedback attribute of each LCH in the MAC PDU through the above method for MAC PDU grouping. If the HARQ feedback attribute of these LCHs is enable, but the sl grant used to send the MAC PDU is not configured with Associated PSFCH resources, the first terminal device sends a second request message to the network side device, and the network side device can allocate PSFCH resources to the terminal device according to the second request message, so that the second terminal device can use the newly configured PSFCH resource
  • the HARQ feedback of the MAC PDU prevents the HARQ feedback attribute of the MAC PDU from mismatching the resources configured by the UE, thereby avoiding unnecessary retransmission or packet loss due to lack of retransmission.
  • the response of the network-side device to the second request message may be understood as that the network-side device determines to allocate PSFCH resources to the first terminal device according to the second request message.
  • the second request message may include the HARQ feedback attribute of the MAC PDU; the first terminal device sending the second request message to the network side device includes: the first terminal device sends the HARQ of the MAC PDU to the network side device Feedback attributes.
  • the second request message may include MAC CE or RRC signaling.
  • other signaling may also be included, which is not specifically limited in the embodiment of the present application.
  • the second request message directly instructs the network side device to allocate PSFCH resources in the form of signaling, and can also indicate the HARQ feedback attribute of the MAC PDU in the form of signaling, so that the network side device can feedback the HARQ according to the MAC PDU
  • the attribute allocates PSFCH resources.
  • S402 may include: the network-side device reconfigures the PSFCH resource associated with the sl grant; or, the network-side device re-allocates the resource pool, and the re-allocated resource pool is configured with the PSFCH resource.
  • Fig. 5 is a fourth schematic flowchart of a side link communication method in an embodiment of this application. As shown in Fig. 5, the method may include:
  • S501 The HARQ feedback attribute of at least one LCH configured by the network side device for the terminal device (the first terminal device and/or the second terminal device) is enable;
  • the network side device configures a resource pool for the terminal device.
  • At least one of the resource pools configured this time is configured with PSFCH resources.
  • PSFCH resources when configuring the resource pool, if the attribute of at least one LCH is enable, then at least one resource pool has PSFCH resources; or when configuring the LCH, if the attribute of at least one LCH is enable, then at least one resource pool has PSFCH resources; or, when configuring LCH, if at least one resource pool has PSFCH resources, only one or more LCH attributes can be configured as enable.
  • the network side device configures the resource pool for the terminal device, if the terminal device is configured with at least one LCH with the HARQ feedback attribute of enable, then at least one resource pool has PSFCH resources. In other words, if the network side device is configured for the terminal device At least one resource pool has PSFCH resources, and the network side device can configure the LCH with the HARQ feedback attribute of enable for the terminal device. Or when the network side device configures the LCH for the terminal device, if the attribute of at least one LCH is enable, then at least one resource pool has PSFCH resources.
  • the second terminal device can perform HARQ feedback on the MAC PDU on the configured PSFCH resource to avoid MAC
  • the HARQ feedback attribute of the PDU does not match the resource configured by the UE, thereby avoiding unnecessary retransmission or packet loss due to lack of retransmission.
  • the resource pool is correspondingly configured with PSFCH resources. If the network side device configures multiple resource pools for the terminal device, then multiple resource pools At least one of the resource pools must be configured with PSFCH resources. Then, if the terminal device determines that the HARQ attribute of the LCH of the MAC PDU is enable, the second terminal device can send the HARQ feedback information of the MAC PDU to the first terminal device on the PSFCH resource.
  • Fig. 6 is a schematic flow chart 5 of the side link communication method in an embodiment of this application. As shown in Fig. 6, the method may include:
  • the first terminal device determines that the HARQ feedback attribute of the LCH in the MAC PDU is enable, and the sl grant used to send the MAC PDU is not configured with associated PSFCH resources;
  • S602 The first terminal device enters an idle state or a third (inactive) state, and performs resource reselection;
  • the reselected resource pool is configured with PSFCH resources.
  • the first terminal device can determine the HARQ feedback attribute of each LCH in the MAC PDU through the above method for MAC PDU grouping. If the HARQ feedback attribute of these LCHs is enable, but the sl grant used to send the MAC PDU is not configured with For the associated PSFCH resource, the first terminal device can enter the idle state or the third state by itself. In the idle state or the third state, also known as the inactive state, the first terminal device can perform resource reselection to select the PSFCH configuration The resource pool of the resource.
  • the second terminal device can send HARQ feedback on the PSFCH resource corresponding to the reselected resource pool to avoid the HARQ feedback attributes of the MAC PDU from mismatching the resources configured by the UE, thereby avoiding unnecessary Retransmissions or packet loss due to lack of retransmissions.
  • the above method further includes: the first terminal device switches to the side link mode 2 after entering the idle state or the third state. Since in the side link mode2, the first terminal device can select resources by itself without the need for network side device scheduling, then the first terminal device can independently perform resource reselection after entering the idle state or the third state.
  • FIG. 7 is a schematic diagram 6 of the flow of the side link communication method in an embodiment of this application. As shown in FIG. 7, the method may include:
  • the first terminal device determines that the HARQ feedback attribute of the LCH in the MAC PDU is enable, and the sl grant used to send the MAC PDU is not configured with associated PSFCH resources;
  • S702 The first terminal device reselects DST.
  • the first terminal device can determine the HARQ feedback attribute of each LCH in the MAC PDU through the above method for MAC PDU grouping. If the HARQ feedback attribute of these LCHs is enable, but the sl grant used to send the MAC PDU is not configured with For the associated PSFCH resource, the first terminal device re-selects the DST, and the HARQ feedback attribute of the LCH associated with the re-selected DST can be disabled. In this way, the HARQ feedback attribute of the MAC PDU and the resource configured by the UE do not match, thereby avoiding non-matching. Necessary retransmission or packet loss due to lack of retransmission.
  • the process of reselecting DST by the first terminal device is as follows:
  • the first terminal device selects the LCH or MAC CE (that is, the second LCH or the second MAC CE) with the highest priority from the LCH or MAC CE that meets the following third condition, and determines the DST for communication based on this LCH.
  • the LCH or MAC CE that is, the second LCH or the second MAC CE
  • the foregoing third condition may include: the HARQ attribute of the LCH is disable;
  • the above-mentioned third condition may also include at least one of the following:
  • configured grant type1 is used to indicate side link configuration authorization type 1;
  • sl-configuredSLGrantType1Allowed is used to indicate whether the data of the LCH can be transmitted on the resources of sidelink configuration authorization type 1.
  • the first terminal device can select LCH or MAC CE from the LCH or MAC CE that meets the condition of "HARQ attribute of LCH is disable" in the third condition above, or it can also select LCH or MAC CE. Select LCH or MAC CE from the condition of "LCH HARQ attribute is disable" and meet some or all of the above three conditions from 1 to 3.
  • the first terminal device determines the DST, if there are LCHs that meet the following fourth condition among the LCHs associated with this DST, these LCHs need to be screened out, and then all the selected LCHs should be selected. Resource allocation.
  • the above-mentioned fourth condition may include at least one of the following:
  • the HARQ feedback attribute of the LCH is the same as the HARQ feedback attribute of the second LCH.
  • the first terminal device may screen LCHs from the LCHs associated with the DST according to all or some of the above fourth conditions.
  • the first terminal device encapsulates the data of the LCH that belongs to the same source and destination pair and has the same HARQ feedback attribute in one MAC PDU.
  • the above-mentioned third condition and fourth condition may also include other conditions, which are not specifically limited in the embodiments of the present application.
  • FIG. 8 is a schematic flowchart of the side link communication method according to an embodiment of the application. Referring to FIG. 8, the method may include:
  • the first terminal device determines that the HARQ feedback attribute of the LCH in the MAC PDU is enable, and the sl grant used to send the MAC PDU is not configured with the associated PSFCH resource, the first terminal device sends a third request message to the second terminal device ;
  • the third request message is used to request the second terminal device not to perform HARQ feedback on the MAC PDU. That is, the first terminal device requests the second terminal not to perform HARQ feedback on the MAC PDU through the third request information.
  • the second terminal device responds to the third request message and does not perform HARQ feedback on the MAC PDU after receiving the MAC PDU.
  • the first terminal device can determine the HARQ feedback attribute of each LCH in the MAC PDU through the above method for MAC PDU grouping. If the HARQ feedback attribute of these LCHs is enable, but the sl grant used to send the MAC PDU is not configured with For the associated PSFCH resource, the first terminal device can send a third request message to the second terminal device to request the second terminal device not to perform HARQ feedback on the MAC PDU, so as to avoid the HARQ feedback attribute of the MAC PDU from mismatching the resource configured by the UE. In turn, unnecessary retransmissions or packet loss due to lack of retransmissions are avoided.
  • the response of the second terminal device to the third request message can be understood as that the second terminal device does not perform HARQ feedback on the MAC PDU after receiving the MAC PDU according to the third request message.
  • the third request message may but is not limited to include: control information.
  • the control information can be SCI.
  • the above method may include: the first terminal device configures the HARQ feedback attribute in the control information to disable. That is, the first terminal device may configure one or more bits (such as 1 bit) used to indicate the HARQ feedback attribute in the control information to be disabled. Then, after receiving the control information, the second terminal device may not perform HARQ feedback on the corresponding MAC PDU according to the bit.
  • the embodiments of the present application also provide a communication device.
  • the communication device may be a chip or a system on a chip in the first terminal device, or may be used in the first terminal device to implement any of the foregoing possible implementations.
  • the chip or system on chip includes a memory, and instructions are stored in the memory, and the above method is executed when the instructions are called by the system on chip or chip.
  • Fig. 9 is a schematic structural diagram 1 of the communication device in the embodiment of the application. As shown in Fig.
  • the communication device 900 may include: a sending module 901 and a processing module 902;
  • the HARQ feedback attribute of the LCH in the LCH is disabled, and the sl grant used to send the MAC PDU is configured with the associated PSFCH resource, then the first request message is sent to the second terminal device, and the first request message is used to request the second
  • the terminal device performs HARQ feedback on the MAC PDU, the first terminal device performs sidelink communication with the second terminal device, and the MAC PDU is the initial transmission on the sl grant.
  • the first request message includes: control information; and a processing module, which is further configured to configure the HARQ feedback attribute in the control information to be enabled.
  • control information is SCI.
  • the communication device 900 further includes: a receiving module 903, configured to receive HARQ feedback information sent by the second terminal device; If information, the positive response information is sent on the PUCCH resource; or, if the HARQ feedback information is negative response information, the negative response information is sent on the PUCCH resource.
  • a receiving module 903 configured to receive HARQ feedback information sent by the second terminal device; If information, the positive response information is sent on the PUCCH resource; or, if the HARQ feedback information is negative response information, the negative response information is sent on the PUCCH resource.
  • the foregoing sending module may be a sending interface, a sending circuit, or a transmitter, etc.
  • the foregoing receiving module may be a receiving interface, a receiving circuit, or a receiver, etc.
  • the foregoing processing module may be one or more processors.
  • the embodiments of the present application also provide a communication device.
  • the communication device may be a chip or a system-on-chip in the first terminal device, or may be used in the first terminal device to implement any of the foregoing possible implementations.
  • the chip or system on chip includes a memory, and instructions are stored in the memory, and the above method is executed when the instructions are called by the system on chip or chip. Still referring to FIG.
  • the communication device 900 may include: a sending module 901 and a processing module 902; a sending module 901, used if the processing module 902 determines that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and is used to send
  • the sl grant of the MAC PDU is not configured with the associated PSFCH resource, and the sl grant is ignored.
  • the MAC PDU is the initial transmission on the sl grant.
  • the sending module is specifically configured to send the MAC PDU to the second terminal device without slgrant.
  • the foregoing method may further include: if the processing module determines that the HARQ feedback attribute of the LCH to be grouped is enabled before the packet is grouped, and the sl grant used to send the MAC PDU is not configured for association The processing module can ignore the sl grant. If the processing module does not generate the corresponding MAC PDU for the sl grant, it is not the sl grant group packet; or, when the processing module determines the DST according to the priority of the LCH, If the HARQ attribute of the highest priority LCH is enabled, stop continuing to filter the LCH.
  • the foregoing sending module may be a sending interface, a sending circuit, or a transmitter, etc.; the foregoing processing module may be one or more processors.
  • the embodiments of the present application also provide a communication device.
  • the communication device may be a chip or a system on a chip in the first terminal device, or may be used in the first terminal device to implement any of the foregoing possible implementations.
  • the chip or system on chip includes a memory, and instructions are stored in the memory, and the above method is executed when the instructions are called by the system on chip or chip. Still referring to FIG.
  • the communication device 900 may include: a sending module 901 and a processing module 902; a sending module 901, used if the processing module 902 determines that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and is used to send If the associated PSFCH resource is not configured in the sl grant of the MAC PDU, a second request message is sent to the network side device. The second request message is used to request the allocation of PSFCH resources for the first terminal device.
  • the MAC PDU is the initial transmission on the sl grant.
  • the second request message may include the HARQ feedback attribute of the MAC PDU; the first terminal device sending the second request message to the network side device includes: the first terminal device sends the HARQ of the MAC PDU to the network side device Feedback attributes.
  • the second request message may include MAC CE or RRC.
  • other signaling may also be included, which is not specifically limited in the embodiment of the present application.
  • the second request message is used to request the network side device to allocate PSFCH resources associated with sl grant; or, the second request message is used to request the network side device to reallocate the resource pool, and the resource pool is configured with PSFCH resources .
  • the foregoing sending module may be a sending interface, a sending circuit, or a transmitter, etc.; the foregoing processing module may be one or more processors.
  • the embodiments of the present application also provide a communication device.
  • the communication device may be a chip or a system-on-chip in a network-side device.
  • the chip or system on chip includes a memory, and instructions are stored in the memory, and the above method is executed when the instructions are called by the system on chip or chip.
  • the communication apparatus may include: a processing module 902, configured to configure a resource pool for the first terminal device if the HARQ feedback attribute of at least one LCH configured for the first terminal device is enabled. At least one resource pool in is configured with PSFCH resources.
  • processing module may be one or more processors.
  • the embodiments of the present application also provide a communication device.
  • the communication device may be a chip or a system on a chip in the first terminal device, or may be used in the first terminal device to implement any of the foregoing possible implementations.
  • the chip or system on chip includes a memory, and instructions are stored in the memory, and the above method is executed when the instructions are called by the system on chip or chip. Still referring to FIG.
  • the communication device 900 may include: a processing unit 902, configured to determine that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured with the associated PSFCH resource , Enter the idle state or the third state, and perform resource reselection.
  • the reselected resource pool is configured with PSFCH resources, and the MAC PDU is the initial transmission on the sl grant.
  • the processing unit is also used to switch to the side link mode 2 after entering the idle state or the third state.
  • processing module may be one or more processors.
  • the embodiments of the present application also provide a communication device.
  • the communication device may be a chip or a system on a chip in the first terminal device, or may be used in the first terminal device to implement any of the foregoing possible implementations.
  • the chip or system on chip includes a memory, and instructions are stored in the memory, and the above method is executed when the instructions are called by the system on chip or chip. Still referring to FIG.
  • the communication device 900 may include: a processing unit 902, configured to determine that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured with the associated PSFCH resource , Then re-select the communication target DST, MAC PDU is the initial transmission on sl grant.
  • DST is DST determined according to LCH or MAC CE, and LCH or MAC CE is the highest priority among multiple LCHs or MAC CEs that meet preset conditions; the preset conditions include at least: multiple LCHs Or the HARQ feedback attribute of the MAC CE is disabled.
  • processing module may be one or more processors.
  • the embodiments of the present application also provide a communication device.
  • the communication device may be a chip or a system on a chip in the first terminal device, or may be used in the first terminal device to implement any of the foregoing possible implementations.
  • the chip or system on chip includes a memory, and instructions are stored in the memory, and the above method is executed when the instructions are called by the system on chip or chip. Still referring to FIG.
  • the communication device 900 may include: a sending module 901 and a processing module 902; the sending module 901 is used to send the HARQ feedback attribute of the LCH in the MAC PDU to enable if the processing module determines The sl grant of the MAC PDU is not configured with the associated PSFCH resource, and a third request message is sent to the second terminal device. The third request message is used to request the second terminal device not to perform HARQ feedback on the MAC PDU.
  • the third request message may include: control information; and a processing module configured to configure the HARQ feedback attribute in the control information to be disabled.
  • FIG. 10 is a second structural diagram of a terminal device in an embodiment of the application. As shown in FIG.
  • the communication device 1000 includes: a processor 1001 and a memory, the processor 1001 is coupled with the memory 1002, and the processor 1001 is configured to read And execute the instructions in the memory 1002; the processor 1001 is configured to if the processor 1001 determines that the HARQ feedback attribute of the LCH in the MAC PDU is disabled, and the network side device configures the terminal device with PUCCH resources and is used to send MAC If the sl grant of the PDU has been configured with the associated PSFCH resource, the first request message is sent to the second terminal device. The first request message is used to request the second terminal device to perform HARQ feedback on the MAC PDU.
  • the MAC PDU is the initial on the sl grant. transmission.
  • the first request message includes: control information; the processor is further configured to configure the HARQ feedback attribute in the control information to be enabled.
  • control information is SCI.
  • the processor is further configured to receive HARQ feedback information sent by the second terminal device; and is also configured to send the acknowledgement information on the PUCCH resource if the HARQ feedback information is acknowledgement information; or, If the HARQ feedback information is negative response information, the negative response information is sent on the PUCCH resource.
  • the terminal device 1000 includes: the communication device 1000 includes: a processor 1001 and a memory, the processor 1001 is coupled to the memory 1002, and the processor 1001 is configured to read and execute instructions in the memory 1002; processing The device 1001 is configured to, if the processor 1001 determines that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured with the associated PSFCH resource, sl grant is ignored, and the MAC PDU is sl grant. Initial transmission.
  • the processor 1001 is configured to not send the MAC PDU to the second terminal device through slgrant.
  • the processor 1001 is further configured to determine that the HARQ feedback attribute of the LCH to be grouped is enabled before the packet is grouped, and the sl grant used to send the MAC PDU is not configured for association For the PSFCH resource, the corresponding MAC PDU is not generated for the sl grant; or, the processor 1001 is also configured to determine DST according to the priority of the LCH, if the HARQ attribute of the highest priority LCH is enabled, then Stop continuing to filter LCH.
  • the terminal device 1000 includes: a processor 1001, a memory 1002, and a communication interface 1003.
  • the processor 1001 is coupled to the memory 1002, and the communication interface 1003 is configured to be configured if the processor 1001 determines the LCH in the MAC PDU If the HARQ feedback attribute is enabled, and the associated PSFCH resource is not configured in the sl grant used to send MAC PDUs, a second request message is sent to the network side device, and the second request message is used to request the allocation of PSFCH resources to the first terminal device, MAC PDU is the initial transmission on sl grant.
  • the second request message includes the HARQ feedback attribute of the MAC PDU; the communication interface 1003 is configured to send the HARQ feedback attribute of the MAC PDU to the network side device.
  • the second request message includes MAC control unit CE or radio resource control RRC signaling.
  • the second request message is used to request the network side device to allocate PSFCH resources associated with sl grant; or, the second request message is used to request the network side device to reallocate the resource pool, and the resource pool is configured with PSFCH resources .
  • the communication device 1000 includes: a processor 1001 and a memory 1002, the processor 1001 is coupled with the memory 1002, the processor 1001 is configured to read and execute instructions in the memory 1002; the processor 1101 is configured To configure a resource pool for the first terminal device if the HARQ feedback attribute of at least one LCH configured for the first terminal device is enabled, and at least one resource pool in the resource pool is configured with PSFCH resources.
  • an embodiment of the present application provides a communication device, which may be a terminal device, and the terminal device may be consistent with the first terminal device described in one or more of the foregoing embodiments.
  • the communication device 1000 includes a processor 1001 and a memory 1002, and the processor 1001 is coupled with the memory 1002.
  • the processor 1001 is configured to read and execute instructions in the memory 1002; the processor 1001 is configured to determine that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured for association If the PSFCH resource is in the idle state or the third state, and resource reselection is performed, the reselected resource pool is configured with PSFCH resources, and the MAC PDU is the initial transmission on the sl grant.
  • the processor 1001 is further configured to switch to the side link mode 2 after entering the idle state or the third state.
  • the communication device 1000 includes a processor 1001 and a memory 1002, and the processor 1001 is coupled with the memory 1002.
  • the processor 1001 is configured to read and execute instructions in the memory 1002;
  • the processor 1101 is configured to determine that the HARQ feedback attribute of the LCH in the MAC PDU is enabled, and the sl grant used to send the MAC PDU is not configured for association For PSFCH resources, re-select the communication target DST, and MAC PDU is the initial transmission on sl grant.
  • DST is DST determined according to LCH or MAC CE, and LCH or MAC CE is the highest priority among multiple LCHs or MAC CEs that meet preset conditions; the preset conditions include at least: multiple LCHs Or the HARQ feedback attribute of the MAC CE is disabled.
  • an embodiment of the present application provides a communication device, which may be a terminal device, and the terminal device may be consistent with the first terminal device described in one or more of the foregoing embodiments.
  • the communication device 1000 includes: a processor 1001 and a memory 1002.
  • the processor 1001 is coupled to the memory 1002; the processor 1001 is configured to read and execute instructions in the memory 1102; and the processor 1101 is It is configured to send the third request message to the second terminal device if the processor 1001 determines that the HARQ feedback attribute of the LCH in the MAC PDU is enable and the sl grant used to send the MAC PDU is not configured with the associated PSFCH resource It is used to request the second terminal device not to perform HARQ feedback on the MAC PDU.
  • the third request message may include: control information; correspondingly, the communication interface 1003 is further configured to, for example, configure the HARQ feedback attribute in the control information to be disabled.
  • the present application provides a side link communication system, including: the first terminal device and the second terminal device as described in any of the above possible implementation manners, and any of the above possible implementation manners The network side equipment.
  • this application provides a computer-readable storage medium, which stores instructions.
  • the instructions run on a computer, they are used to execute the side described in any of the above-mentioned possible implementations.
  • Uplink communication method When the instructions run on a computer, they are used to execute the side described in any of the above-mentioned possible implementations.
  • this application provides a computer program or computer program product.
  • the computer program or computer program product is executed on a computer, the computer realizes the side link described in any of the above possible implementations. Communication method.
  • the computer-readable medium may include a computer-readable storage medium, which corresponds to a tangible medium, such as a data storage medium, or a communication medium that includes any medium that facilitates the transfer of a computer program from one place to another (for example, according to a communication protocol) .
  • a computer-readable medium may generally correspond to (1) a non-transitory tangible computer-readable storage medium, or (2) a communication medium, such as a signal or carrier wave.
  • Data storage media may be any available media that can be accessed by one or more computers or one or more processors to retrieve instructions, codes, and/or data structures for implementing the techniques described in this application.
  • the computer program product may include a computer-readable medium.
  • such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, flash memory, or structures that can be used to store instructions or data Any other media that can be accessed by the computer in the form of desired program code. And, any connection is properly termed a computer-readable medium.
  • any connection is properly termed a computer-readable medium.
  • coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave to transmit instructions from a website, server, or other remote source
  • coaxial cable Wire, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of media.
  • the computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other temporary media, but are actually directed to non-transitory tangible storage media.
  • magnetic disks and optical disks include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVD) and Blu-ray disks, where disks usually reproduce data magnetically, while optical disks use lasers to reproduce data optically data. Combinations of the above should also be included in the scope of computer-readable media.
  • DSP digital signal processors
  • ASIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • DSP digital signal processors
  • ASSIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • DSP digital signal processors
  • ASIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • processor may refer to any of the foregoing structure or any other structure suitable for implementing the techniques described herein.
  • the functions described by the various illustrative logical blocks, modules, and steps described herein may be provided in dedicated hardware and/or software modules configured for encoding and decoding, or combined Into the combined codec.
  • the technology may be fully implemented in one or more circuits or logic elements.
  • the technology of this application can be implemented in a variety of devices or devices, including wireless handsets, integrated circuits (ICs), or a set of ICs (for example, chipsets).
  • ICs integrated circuits
  • a set of ICs for example, chipsets.
  • Various components, modules, or units are described in this application to emphasize the functional aspects of the device for implementing the disclosed technology, but they do not necessarily need to be implemented by different hardware units.
  • various units can be combined with appropriate software and/or firmware in the codec hardware unit, or by interoperating hardware units (including one or more processors as described above). supply.

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Abstract

本申请提供一种侧行链路通信方法、装置及系统。该方法可以包括: 如果第一终端设备确定在sl grant上新传的MAC PDU中的LCH的HARQ反馈属性为disable,并且网络侧设备为第一终端设备配置有PUCCH资源以及用于发送MAC PDU的sl grant配置有关联的PSFCH资源,那么,第一终端设备可以请求第二终端设备对这个MAC PDU做HARQ反馈,以避免不必要的重传,节约资源。

Description

一种侧行链路通信方法、装置及系统
本申请要求于2020年4月9日提交中国专利局、申请号为202010276021.1、申请名称为“一种侧行链路通信方法、装置及系统”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域,特别涉及一种侧行链路通信方法、装置及系统。
背景技术
在新无线电(new radio,NR)侧行链路(sidelink,SL)中,对于用户设备(user equipment,UE)预配置或者网络侧为UE配置的用于SL通信资源池,一个资源池为一段时频资源的集合。UE在SL上进行通信的资源是从网络侧所配置的资源池中确定的。
当发送端UE(TX UE)在侧行链路授权(sl grant)上进行初始传输时,TX UE发送媒介访问控制层分组数据单元(medium access control packet data unit,MAC PDU),如果TX UE配置了物理上行控制信道(physical uplink control channel,PUCCH)资源并且该sl grant有关联的物理侧行链路反馈信道(physical sidelink feedback channel,PSFCH)资源,但是MAC PDU的混合自动重传请求(hybrid automatic retransmission request,HARQ)反馈属性为去使能(disable),就会存在由于缺乏PUCCH上的HARQ信息反馈,造成不必要的重传,浪费资源。
发明内容
本申请提供了一种侧行链路通信方法、装置及系统,以避免不必要的重传,节约资源。
第一方面,本申请提供一种侧行链路通信方法,该方法包括:如果第一终端设备确定MAC PDU中的逻辑信道(logic channel,LCH)的HARQ反馈属性为非使能(disable),且网络侧设备为第一终端设备配置有PUCCH资源以及用于发送MAC PDU的sl grant已配置有关联的PSFCH资源,则第一终端设备可以向第二终端设备发送第一请求消息,以请求第二终端设备对MAC PDU进行HARQ反馈。
在本申请中,上述MAC PDU为上述sl grant上的初始传输(initial transmission),也就是说,MAC PDU为第一终端设备在该sl grant上新传数据。
通过上述方法,如果第一终端设备在sl grant上新传的MAC PDU中的LCH是不支持HARQ反馈的,但是网络侧设备又为第一终端设备配置有PUCCH资源以及与上述sl grant有关联的PSFCH资源,那么,第一终端设备可以请求第二终端设备对这个MAC PDU做HARQ反馈,如此,避免不必要的重传,节约资源。。
基于第一方面,在一些可能的实施方式中,第一请求消息可以包括:控制信息;相应的,上述方法还可以包括:第一终端设备将控制信息中HARQ反馈属性配置为使能。
在本申请中,HARQ反馈属性可以通过控制信息中一个或者多个比特位(bits)进行指示。那么,第一终端设备将控制信息中用于指示HARQ反馈属性的比特位设置为enable。
基于第一方面,在一些可能的实施方式中,上述控制信息可以为侧行链路控制信息(sidelink control information,SCI),也就是说,第一终端设备向第二终端设备发送SCI,以请求第二终端设备对MAC PDU进行HARQ反馈。
基于第一方面,在一些可能的实施方式中,上述方法还可以包括:第一终端设备接收第二终端设备发送的HARQ反馈信息,即第二终端设备对第一请求信息的应答消息;如果HARQ反馈信息为肯定应答信息(ACK),则第一终端设备在PUCCH资源上向网络侧设备发送肯定应答信息;或者,如果HARQ反馈信息为否定应答信息,则第一终端设备在PUCCH资源上向网络侧设备发送否定应答信息,如此,避免不必要的重传,节约资源。
第二方面,本申请提供一种侧行链路通信方法,该方法包括:第二终端设备接收第一请求消息;第二终端设备响应第一请求消息,在PSFCH上对MAC PDU进行HARQ反馈。
基于第二方面,在一些可能的实施方式中,第二终端设备响应第一请求消息,在PSFCH上对MAC PDU进行HARQ反馈包括:第二终端设备响应第一请求消息,向第一终端设备发送HARQ反馈信息。
基于第二方面,在一些可能的实施方式中,第一请求消息可以包括:控制信息;进一步地,上述控制信息可以为SCI,也就是说,第二终端设备接收来自第二终端设备的SCI,并根据SCI向第一终端设备对MAC PDU进行HARQ反馈。
第三方面,本申请提供一种侧行链路通信方法,该方法包括:如果第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为使能(enable),且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则第一终端设备忽略该sl grant。
在本申请中,上述MAC PDU为上述sl grant上的初始传输。
通过上述方法,如果第一终端设备在sl grant上发送的MAC PDU中的LCH是支持HARQ反馈的,说明该MAC PDU是期望进行HARQ反馈的,但是该sl grant没有被配置关联的PSFCH资源,此时,由于该sl grant不支持HARQ反馈,第一终端设备忽略这个sl grant,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
基于第三方面,在一些可能的实施方式中,第一终端设备忽略侧行链路授权,包括:第一终端设备不通过sl grant向第三终端设备发送MAC PDU。
第四方面,本申请提供一种侧行链路通信方法,该方法包括:如果第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则第一终端设备向网络侧设备发送第二请求消息,第二请求消息用于请求网络侧设备分配PSFCH资源。
在本申请中,上述MAC PDU为sl grant上的初始传输。
通过上述方法,如果第一终端设备在sl grant上发送的MAC PDU中的LCH是支持HARQ反馈的,说明该MAC PDU是期望进行HARQ反馈的,但是该sl grant没有 被配置关联的PSFCH资源,此时,第一终端设备请求网络侧设备分配PSFCH资源,使得第二终端设备可以在新配置的PSFCH资源上对该MAC PDU进行HARQ反馈,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
基于第四方面,在一些可能的实施方式中,第二请求消息可以包括MAC PDU的HARQ反馈属性;第一终端设备向网络侧设备发送第二请求消息,包括:第一终端设备向网络侧设备发送MAC PDU的HARQ反馈属性。
基于第四方面,在一些可能的实施方式中,第二请求消息可以包括MAC控制单元(control element,CE)或无线资源控制(radio resource control,RRC)信令。当然,还可以包括其他信令,本申请实施例不做具体限定。
在本申请中,第二请求消息以信令的方式直接指示网络侧设备分配PSFCH资源,也可以以信令的方式指示MAC PDU的HARQ反馈属性,使得网络侧设备可以根据MAC PDU的HARQ反馈属性分配PSFCH资源。
基于第四方面,在一些可能的实施方式中,第二请求消息用于请求网络侧设备重新配置与sl grant关联的PSFCH资源;或,第二请求消息用于请求网络侧设备重新分配资源池,重新分配的资源池配置有PSFCH资源,也就是说,第一终端设备可以请求网络侧设备为当前资源池分配PSFCH资源,使得用于传输MAC PDU的与sl grant配置有关联的PSFCH资源,或者,第一终端设备可以请求网络侧设备重新为第一终端设备选择新的资源池,该新的资源池配置有PSFCH资源,同样可以使得用于传输MAC PDU的sl grant配置有关联的PSFCH资源,进而第二终端设备可以在新配置的PSFCH资源上对该MAC PDU进行HARQ反馈。
第五方面,本申请提供一种侧行链路通信方法,该方法包括:网络侧设备接收来自第一终端设备的第二请求消息;网络侧设备响应第二请求消息,为第一终端设备分配PSFCH资源。
基于第五方面,在一些可能的实施方式中,第二请求消息可以包括MAC PDU的HARQ反馈属性;网络侧设备接收来自第一终端设备的第二请求消息,包括:网络侧设备接收来自第一终端设备的MAC PDU的HARQ反馈属性。
基于第五方面,在一些可能的实施方式中,第二请求消息可以包括MA CE或RRC信令。当然,还可以包括其他信令,本申请实施例不做具体限定。
在本申请中,第二请求消息以信令的方式直接指示网络侧设备分配PSFCH资源,也可以以信令的方式指示MAC PDU的HARQ反馈属性,使得网络侧设备可以根据MAC PDU的HARQ反馈属性分配PSFCH资源。
基于第五方面,在一些可能的实施方式中,第二请求消息用于请求网络侧设备重新配置与sl grant关联的PSFCH资源;或,第二请求消息用于请求网络侧设备重新分配资源池,重新分配的资源池配置有PSFCH资源,也就是说,第一终端设备可以请求网络侧设备为当前资源池分配PSFCH资源,使得用于传输MAC PDU的与sl grant配置有关联的PSFCH资源,或者,第一终端设备可以请求网络侧设备重新为第一终端设备选择新的资源池,该新的资源池配置有PSFCH资源,同样可以使得用于传输MAC PDU的sl grant配置有关联的PSFCH资源,进而第二终端设备可以在新配置的PSFCH资源上对该 MAC PDU进行HARQ反馈。
第六方面,本申请提供一种侧行链路通信方法,该方法包括:如果网络侧设备为第一终端设备配置的至少一个LCH的HARQ反馈属性为使能,则网络侧设备为第一终端设备配置资源池,配置的资源池中至少一个资源池配置有PSFCH资源。
通过上述方法,网络侧设备在为第一终端设备配置资源时,如果配置的LCH为支持HARQ反馈的,则需要相应的为第一终端设备配置PSFCH资源,即网络侧设备为第一终端设备配置资源池,配置的资源池中至少一个资源池配置有PSFCH资源。那么,第二终端设备可以在配置的PSFCH资源上对该MAC PDU进行HARQ反馈,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
在本申请中,如果网络侧设备给第一终端设备配置一个资源池,那么,该资源池相应的配置有PSFCH资源,如果网络侧设备给第一终端设备配置多个资源池,那么,多个资源池中至少一个资源池相应的配置有PSFCH资源。如此,可以实现第一终端设备配置支持HARQ反馈的LCH,具有相应的PSFCH资源。相应的也可以理解为对应的,或者可以理解为有关联关系的。
第七方面,本申请提供一种侧行链路通信方法,该方法包括:如果第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则第一终端设备进入空闲(idle)态或第三(inactive)态,并进行资源重选,重选的资源池配置有PSFCH资源。
在本申请中,上述MAC PDU为上述sl grant上的初始传输。
通过上述方法,如果第一终端设备在sl grant上发送的MAC PDU中的LCH是支持HARQ反馈的,说明该MAC PDU是期望进行HARQ反馈的,但是该sl grant没有被配置关联的PSFCH资源,此时,第一终端设备可以进行空闲态或者第三态,以进行资源重选,使得重选的资源池配置有PSFCH资源,那么,第二终端设备可以在重选的PSFCH资源上对该MAC PDU进行HARQ反馈,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
基于第七方面,在一些可能的实施方式中,上述方法还包括:第一终端设备在进入空闲态或第三态后,切换至侧行链路模式2
第八方面,本申请提供一种侧行链路通信方法,该方法包括:如果第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则第一终端设备重新选择DST。
在本申请中,上述MAC PDU为上述sl grant上的初始传输。
通过上述方法,如果第一终端设备在sl grant上发送的MAC PDU中的LCH是支持HARQ反馈的,说明该MAC PDU是期望进行HARQ反馈的,但是该sl grant没有被配置关联的PSFCH资源,此时,第一终端设备可以重新选择DST,重新选择的DST所关联的LCH可以是不支持HARQ反馈的,如此,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
基于第八方面,在一些可能的实施方式中,DST为根据LCH或MAC CE确定的DST,LCH或MAC CE为满足预设条件的多个LCH或MAC CE中优先级最高的;预设条件至少 包括:多个LCH或MAC CE的HARQ反馈属性为非使能。
第九方面,本申请提供一种侧行链路通信方法,该方法包括:如果第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为enable,且用于发送所述MAC PDU的sl grant未配置关联的PSFCH资源,第一终端设备向第二终端设备发送第三请求消息,第三请求消息用于请求第二终端设备不对MAC PDU进行HARQ反馈。
在本申请中,上述MAC PDU为上述sl grant上的初始传输。
基于第九方面,在一些可能的实施方式中,第三请求消息可以包括:控制信息;相应的,上述方法还可以包括:第一终端设备将控制信息中HARQ反馈属性配置为非使能。
在本申请中,HARQ反馈属性可以通过控制信息中一个或者多个比特位(bits)进行指示。那么,第一终端设备将控制信息中用于指示HARQ反馈属性的比特位设置为disable。
通过上述方法,如果第一终端设备在sl grant上发送的MAC PDU中的LCH是支持HARQ反馈的,说明该MAC PDU是期望进行HARQ反馈的,但是该sl grant没有被配置关联的PSFCH资源,此时,第一终端设备请求第二终端设备不对该MAC PDU进行HARQ反馈,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
第十方面,本申请提供一种侧行链路通信方法,该方法包括:第二终端设备接收第一终端设备发送的第三请求消息,第三请求消息用于请求第二终端设备不对MAC PDU进行HARQ反馈;第二终端设备响应所述第三请求信息,不对MAC PDU进行HARQ反馈。
基于第十方面,在一些可能的实施方式中,第三请求消息可以包括:控制信息;控制信息中HARQ反馈属性配置为非使能。
第十一方面,本申请提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述第一方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括:发送模块和处理模块;发送模块用于如果处理模块确定MAC PDU中的LCH的HARQ反馈属性为非使能,且网络侧设备为第一终端设备配置有PUCCH资源以及用于发送MAC PDU的sl grant已配置有关联的PSFCH资源,则向第二终端设备发送第一请求消息,第一请求消息用于请求第二终端设备对MAC PDU进行HARQ反馈,第一终端设备与第二终端设备进行侧行链路通信,MAC PDU为sl grant上的初始传输。
基于第十一方面,在一些可能的实施方式中,第一请求消息包括:控制信息;处理模块,还用于将控制信息中HARQ反馈属性配置为使能。
基于第十一方面,在一些可能的实施方式中,控制信息为SCI。
基于第十一方面,在一些可能的实施方式中,通信装置还包括:接收模块,用于接收第二终端设备发送的HARQ反馈信息;发送模块,还用于如果HARQ反馈信息为肯定应答信息,则在PUCCH资源上发送肯定应答信息;或者,如果HARQ反馈信息为否定应答信息,则在PUCCH资源上发送否定应答信息。
第十二方面,本申请提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述第二方面或其任一可能的实 施方式方法的功能模块。该通信装置可以包括:发送模块和处理模块;发送模块,用于如果处理模块确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,忽略sl grant,MAC PDU为sl grant上的初始传输。
基于第十二方面,在一些可能的实施方式中,发送模块,具体用于不通过sl grant向第二终端设备发送MAC PDU。
基于第十二方面,在一些可能的实施方式中,处理模块,还用于如果在组包前确定待组包的LCH的HARQ反馈属性为使能(enable),且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则不为该sl grant生成对应的MAC PDU;或者,处理模块,还用于在根据LCH的优先级确定DST时,如果最高优先级的LCH的HARQ属性为使能,则停止继续筛选LCH。
第十三方面,本申请提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述第三方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括:发送模块和处理模块;发送模块,用于如果处理模块确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则向网络侧设备发送第二请求消息,第二请求消息用于请求为第一终端设备分配PSFCH资源,MAC PDU为sl grant上的初始传输。
基于第十三方面,在一些可能的实施方式中,第二请求消息包括MAC PDU的HARQ反馈属性;发送模块,具体用于向网络侧设备发送MAC PDU的HARQ反馈属性。
基于第十三方面,在一些可能的实施方式中,第二请求消息包括MAC控制单元CE或无线资源控制RRC信令。
基于第十三方面,在一些可能的实施方式中,第二请求消息用于请求网络侧设备分配与sl grant关联的PSFCH资源;或,第二请求消息用于请求网络侧设备重新分配资源池,资源池配置有PSFCH资源。
第十四方面,本申请提供一种通信装置,该通信装置可以为网络侧设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述第四方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括:处理模块,用于如果为第一终端设备配置的至少一个LCH的HARQ反馈属性为使能,则为第一终端设备配置资源池,资源池中的至少一个资源池配置有PSFCH资源。
第十五方面,本申请提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述第五方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括:处理单元,用于如果确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则进入空闲态或第三态,并进行资源重选,重选的资源池配置有PSFCH资源,MAC PDU为sl grant上的初始传输。
基于第十五方面,在一些可能的实施方式中,处理单元,还用于进入空闲态或第三态后,切换至侧行链路模式2。
第十六方面,本申请提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述第六方面或其任一可能的实 施方式方法的功能模块。该通信装置可以包括:处理单元,用于如果确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则重新选择通信目标DST,MAC PDU为sl grant上的初始传输。
基于第十六方面,在一些可能的实施方式中,DST为根据LCH或MAC CE确定的DST,LCH或MAC CE为满足预设条件的多个LCH或MAC CE中优先级最高的;预设条件至少包括:多个LCH或MAC CE的HARQ反馈属性为非使能。
第十七方面,本申请提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述第七方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括:发送单元和处理单元;发送单元,用于如果处理单元确定MAC PDU中的LCH的HARQ反馈属性为enable,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,向第二终端设备发送第三请求消息,第三请求消息用于请求第二终端设备不对MAC PDU进行HARQ反馈。
基于第十七方面,在一些可能的实施方式中,第三请求消息可以包括:控制信息;相应的,处理单元,还用于将控制信息中HARQ反馈属性配置为非使能。
第十八方面,本申请提供一种通信装置,包括:处理器和存储器;处理器与存储器耦合,处理器被配置为读取并执行存储器中的指令,以实现如上述第一方面至第十方面或其任一可能的实施方式所述的侧行链路通信方法。
第十九方面,本申请提供一种通信装置,包括:处理器和存储器;处理器与存储器耦合,处理器被配置为读取并执行存储器中的指令,以实现如上述第四方面至第六方面或其任一可能的实施方式所述的侧行链路通信方法信。
第二十方面,本申请提供一种侧行链路通信系统,包括:如上述第一方面至第十方面或其任一可能的实施方式所述的第一终端设备和第二终端设备,第一终端设备与第二终端设备进行侧行链路通信。
第二十一方面,本申请提供一种侧行链路通信系统,包括:如上述第一方面至第十方面或其任一可能的实施方式所述的第一终端设备和第二终端设备,以及如上述第四方面至第六方面或其任一可能的实施方式所述的网络侧设备。
第二十二方面,本申请提供一种计算机可读存储介质,计算机可读存储介质存储有指令,当指令在计算机上运行时,用于执行如上述第一方面至第十方面或其任一可能的实施方式所述的侧行链路通信方法。
第二十三方面,本申请提供一种计算机程序或计算机程序产品,当计算机程序或计算机程序产品在计算机上被执行时,使得计算机实现如上述第一方面至第十方面或其任一可能的实施方式所述的侧行链路通信方法。
应当理解的是,本申请的第十一方面至第二十三方面与本申请的第一方面至第十方面的技术方案一致,各方面及对应的可行实施方式所取得的有益效果相似,不再赘述。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案,下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1为本申请实施例中的SL通信系统的示意图;
图2为本申请实施例中的侧行链路通信方法的流程示意图一;
图3为本申请实施例中的侧行链路通信方法的流程示意图二;
图4为本申请实施例中的侧行链路通信方法的流程示意图三;
图5为本申请实施例中的侧行链路通信方法的流程示意图四;
图6为本申请实施例中的侧行链路通信方法的流程示意图五;
图7为本申请实施例中的侧行链路通信方法的流程示意图六;
图8为本申请实施例中的侧行链路通信方法的流程示意图七;
图9为本申请实施例中的通信装置的结构示意图一;
图10为本申请实施例中的通信装置的结构示意图二。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。以下描述中,参考形成本申请一部分并以说明之方式示出本申请实施例的具体方面或可使用本申请实施例的具体方面的附图。应理解,本申请实施例可在其它方面中使用,并可包括附图中未描绘的结构或逻辑变化。例如,应理解,结合所描述方法的揭示内容可以同样适用于用于执行所述方法的对应设备或系统,且反之亦然。例如,如果描述一个或多个具体方法步骤,则对应的设备可以包含如功能单元等一个或多个单元,来执行所描述的一个或多个方法步骤(例如,一个单元执行一个或多个步骤,或多个单元,其中每一个都执行多个步骤中的一个或多个),即使附图中未明确描述或说明这种一个或多个单元。另一方面,例如,如果基于如功能单元等一个或多个单元描述具体装置,则对应的方法可以包含一个步骤来执行一个或多个单元的功能性(例如,一个步骤执行一个或多个单元的功能性,或多个步骤,其中每一个执行多个单元中一个或多个单元的功能性),即使附图中未明确描述或说明这种一个或多个步骤。进一步,应理解的是,除非另外明确提出,本文中所描述的各示例性实施例和/或方面的特征可以相互组合。
本申请实施例提供一种SL通信系统,图1为本申请实施例中的SL通信系统的示意图,参见图1所示,在SL系统100中,可以包括:网络侧设备101和终端设备102。终端设备在与网络侧设备通信的同时,还可以与其他终端设备通信。网络侧设备可以对终端设备之间通信的侧链路(sidelink)进行资源的配置、调度、协调等,辅助终端设备之间直接进行通信。终端设备也可以自行对于其他终端设备之间通信的侧链路进行资源的配置、调度、协调等,本申请实施例不做具体限定。
上述网络侧设备可以是接入网侧用于支持终端接入无线通信系统的设备,例如,可以是5G接入技术通信系统中的下一代基站(gNB,next generation NodeB)、发送接收点(TRP,Transmission Reception Point)、中继节点(Relay Node)、接入点(AP,Access Point)、、路边装置(road site unit,RSU)等。
上述终端设备可以是一种向用户提供语音或者数据连通性的设备,例如也可以称为UE、移动台(mobile station)、用户单元(subscriber unit)、站台(STAtion)或者终端(TE,Terminal Equipment)等。终端设备可以为蜂窝电话(cellular phone)、个人数字助理(PDA,Personal Digital Assistant)、无线调制解调器(modem)、手持设备(handheld)、膝上型电脑(laptop  computer)、无绳电话(cordless phone)、无线本地环路(WLL,Wireless Local Loop)台或者平板电脑(pad)等。随着无线通信技术的发展,可以接入无线通信系统、可以与无线通信系统的网络侧进行通信,或者通过无线通信系统与其它设备进行通信的设备都可以是本申请实施例中的终端设备,譬如,智能交通中的终端和汽车、智能家居中的家用设备、智能电网中的电力抄表仪器、电压监测仪器、环境监测仪器、智能安全网络中的视频监控仪器、收款机等等。终端设备可以是静态固定的,也可以是移动的。
在NR SL中,网络侧设备,如基站为UE的SL通信配置资源池,一个资源池为一段时频资源的集合。UE在SL链路上进行通信的资源是从预配置或者基站侧配置的资源池中确定的。具体的,Tx UE从资源池确定在SL链路进行通信的传输资源有两种模式,分别是mode1和mode2。其中,上述预配置的资源可以是从核心网的网元获取的,也可以是预置在UE内的。
在mode1下,基站通过调度为Tx UE分配SL传输资源。在此模式下,当Tx UE有SL待传输数据时,通过Uu口向基站上报SL缓存状态报告(buffer status report,BSR)MAC CE,以告知基站当前Tx UE在PC5口的待传输数据的数据量。基站可以为Tx UE动态分配传输资源。
在mode2下,UE根据需要自己从预配置或者基站配置的资源池中选择传输资源,不需要基站进行调度。UE确定的SL资源是基站配置的(如通过RRC信令配置或者系统信息块(system information block,SIB)配置),或者预配置的。这里所说的预配置可以是从核心网的网元获取,也可以是预置在UE内的。
当基于sl grant分配的上行无线资源时,UE需要决定包含在新传的MAC PDU中的每个LCH的数据总量,如果必要的话,UE还要为MAC CE分配资源。也就是说,网络侧设备通过sl grant分配给某个UE的上行资源是确定的,该UE基于已配置的LCH属性和现有协议规定的规则,来决定放置哪些LCH的数据以及每个LCH逻辑信道放置多少数据在MAC PDU中。
具体来说,当TX UE在sl grant上新传数据时,如果TX UE同时跟多个RX UE建立了连接,并且有数据的LCH属于不同的DST,那么,TX UE首先需要确定本次sl grant用于跟哪个DST通信。对于本次sl grant,TX UE在满足如下第一条件的LCH或者MAC CE中选择优先级最高的LCH或者MAC CE(即第一LCH或第一MAC CE),然后,TX UE再根据选中的第一LCH或者第一MAC CE确定通信的DST。
这里,上述第一条件可以包括:
1、有SL数据等待传输;
2、SB j>0
3、如果本次sl grant是configured grant type1,LCH如果配置了sl-configuredSLGrantType1Allowed,这个值为true。
其中,configured grant type1用于表示侧行链路配置授权类型1;
其中,sl-configuredSLGrantType1Allowed用于表示该LCH的数据是否可以在侧行链路配置授权类型1的资源上进行传输。
这里,UE采用类似于令牌桶(token bucket)的算法来实现MAC PDU的封装。UE基于令牌桶内是否有令牌以及令牌(token)的多少来确定是否发送某LCH的数据,并控封 装在MAC PDU中的该逻辑信道的数据量。UE为第j个LCH维护一个变量SB j,j为大于或者等于1且小于或者等于令牌桶中token数的整数,SB j指示了令牌桶里当前可用的token数,,且每个token对应1Byte的数据。SB j在LCH建立时初始化为0,且每个T增加sPBR×T,其中T是SB j上次增加后过去的时间。SB j的值不能超过令牌桶的最大容量。
其次,当TX UE根据上述第一条件确定出DST后,TX UE需要将跟这个DST关联的第一LCH中满足如下第二条件的第一LCH筛选出来,然后,TX UE在所有选出的第一LCH中做资源分配。
这里,上述第二条件可以包括:
1、有SL数据等待传输;
2、如果本次sl grant是configured grant type1,LCH如果配置了sl-configuredSLGrantType1Allowed,这个值为true;
3、LCH的HARQ反馈属性与第一LCH的HARQ反馈属性相同。
最后,TX UE将属于同一源和目的对的且具有相同HARQ属性的LCH的数据封装在一个MAC PDU中。
在本申请实施例中,一方面,网络侧设备在为UE配置资源池时,网络侧设备为UE配置物理侧行链路共享信道(physical sidelink shared channel,PSSCH)资源,UE在PSSCH资源上传输数据。
当RX UE通过PSSCH接收到TX UE发送的数据后,可以在PSFCH资源上反馈HARQ的应答消息(如肯定应答消息(ACK)或否定应答消息(NACK)),但是,网络侧设备在配置资源池时可以为该资源池配置PSFCH资源,也可以不为该资源池配置PSFCH资源。如果网络侧为资源池配置PSFCH资源,则该资源池里每个sl grant都存在关联的PSFCH资源,反之,如果网络侧不为资源池配置PSFCH资源,则该资源池里的每个sl grant都不存在关联的PSFCH资源。
另一方面,网络侧设备在给UE配置可用于SL通信的LCH的时候,可以通过如sl-HARQ-feedback-enable字段来配置SL LCH的HARQ属性,其中,SL LCH的HARQ属性是per UE的。如果配置为enable,则表明这个SL LCH是支持HARQ反馈的,如果配置为disable,表明这个SL LCH是不支持HARQ反馈的。
由此可以看出,如果新传的MAC PDU里面的LCH的HARQ属性都是disable,则RX UE不会向TX UE发送HARQ反馈,那么,TX UE也就无法在PUCCH资源上向网络侧进行HARQ反馈,导致网络侧认为TX UE没有收到任何HARQ反馈,进而认为RX UE侧解码失败,从而频繁的给RX UE调度重传,浪费资源。或者,如果新传的MAC PDU里面的LCH的HARQ属性为enable,但是UE并没有配置PSFCH资源,此时,MAC PDU的HARQ反馈属性与UE配置的资源不匹配,就会造成不必要的重传或者因缺乏重传而导致丢包。
那么,为了解决上述问题,本申请实施例提供了一种侧行链路通信方法,该方法可以应用于上述侧行链路通信系统中,上述UE可以包括第一终端设备和第二终端设备。在本申请实施例中,第一终端设备可以作为发送端设备(即TX UE),第二终端设备可以作为接收端设备(即RX UE)。
由于网络侧设备为TX UE配置资源池可分为配置有PSFCH资源和未配置PSFCH资 源,那么,下面基于上述两种情况分别对上述侧行链路通信方法进行说明。
第一种情况,网络侧设备为TX UE配置资源池配置有PSFCH资源,那么,用于发送MAC PDU的sl grant已配置有关联的PSFCH资源。
图2为本申请实施例中的侧行链路通信方法的流程示意图一,参见图2所示,该方法可以包括:
S201:如果第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为disable,且网络侧设备为第一终端设备配置有PUCCH资源以及用于发送MAC PDU的sl grant已配置有关联的PSFCH资源,则第一终端设备可以向第二终端设备发送第一请求消息;
其中,第一请求信息用于请求第二终端设备对MAC PDU进行HARQ反馈。也就是说,第一终端设备通过该第一请求信息向第二终端请求对MAC PDU进行HARQ反馈。
S202:第二终端设备响应第一请求消息,向第一终端设备发送HARQ反馈信息。
这里,第二终端设备响应第一请求消息可以理解为,第二终端设备根据该第一请求消息,在收到MAC PDU后对该MAC PDU进行HARQ反馈。
第一终端设备在通过上述方法进行MAC PDU组包后,可以确定该MAC PDU中每一个LCH的HARQ反馈属性,如果这些LCH的HARQ反馈属性为disable,且网络侧设备为第一终端设备配置有PUCCH资源以及用于发送MAC PDU的sl grant已配置有关联的PSFCH资源,那么,第一终端设备可以通过第一请求消息向第二终端设备请求对该MAC PDU进行HARQ反馈,第二终端设备在接收到该第一请求消息后,响应第一请求消息,在PSFCH资源上向第一终端设备发送HARQ反馈信息,如ACK消息或者NACK消息。第一终端设备接收到HARQ反馈信息。然后,第一终端设备根据接收到的HARQ反馈信息在PUCCH资源上向网络侧设备发送应答消息。
需要说明的是,在本申请实施例中所述的MAC PDU为sl grant上的初始传输,即在sl grant上的新传数据,下述实施例中不再赘述。
在一些可能的实施方式中,第一请求消息可以且不限于包括:控制信息。其中,控制信息可以为上述新传的MAC PDU对应的SCI。
相应地,在S201之前,上述方法可以包括:第一终端设备将控制信息中HARQ反馈属性配置为使能。也就是说,第一终端设备可以将控制信息中用于表示HARQ反馈属性的一个或多个比特位(bits)配置为enable。那么,第二终端设备在接收到控制信息后,就可以根据该比特位(bits),对对应的MAC PDU进行HARQ反馈。在实际应用中,控制信息中用于表示HARQ反馈属性的比特位可以设置为0,以指示disable,容易理解的,比特位也可以设置为1,以指示enable。当然,控制信息中用于表示HARQ反馈属性的比特位还可以存在其他的表示方式,本申请实施例不做具体限定。
在本申请实施例中,网络侧设备在为TX UE配置资源时,还会配置相应的PUCCH资源,使得TX UE可以在PUCCH资源上向网络侧设备进行HARQ反馈。
那么,上述方法还可以包括:第一终端设备接收第二终端设备发送的HARQ反馈信息,即第二终端设备对第一请求信息的应答消息;如果HARQ反馈信息为ACK,则第一终端设备在PUCCH资源上向网络侧设备发送ACK;或者,如果HARQ反馈信息为NACK,则第一终端设备在PUCCH资源上向网络侧设备发送NACK。网络侧设备接收到第一终端设备发送的应答消息后,就不会频繁地为RX UE调度重传,节约资源。
第二种情况,网络侧设备为TX UE配置资源池未配置PSFCH资源,那么,用于发送 MAC PDU的sl grant未配置有关联的PSFCH资源。此时,如果MAC PDU中的LCH的HARQ反馈属性为enable,由于没有PSFCH资源,就会存在MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而造成不必要的重传或者因缺乏重传而导致丢包。
为此,在第二种情况下,可以且不限于采用以下几种方案来解决上述问题。
方案一:
图3为本申请实施例中的侧行链路通信方法的流程示意图二,参见图3所示,该方法可以包括:
S301:第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为enable,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源;
S302:第一终端设备忽略该sl grant。
第一终端设备在通过上述方法进行MAC PDU组包,可以确定该MAC PDU中每一个LCH的HARQ反馈属性,如果第一终端设备在sl grant上发送的MAC PDU中的LCH是支持HARQ反馈的,说明该MAC PDU是期望进行HARQ反馈的,但是该sl grant没有被配置关联的PSFCH资源,此时,第一终端设备忽略这个sl grant,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
在一些可能的实施方式中,上述S302中,由于MAC PDU已经组包,此时,第一终端设备忽略该sl grant就可以理解为第一终端设备不在该sl grant上发送MAC PDU,或者第一终端设备将改MAC PDU丢弃。那么,S301可以包括:第一终端设备不通过sl grant向第二终端设备发送MAC PDU。
第一终端设备中复用和组装实体(multiplexing and assembly)在将属于同一源和目标对(source and destination pair)且具有相同HARQ属性的LCH的数据封装在一个MAC PDU后,第一终端中的MAC实体可以不通过sl grant向第二终端设备发送该MAC PDU。
在本申请另一实施例中,第一终端设备还可以在MAC PDU组包之前忽略该sl grant。那么,如果第一终端设备确定待封装的LCH的HARQ反馈属性为enable,且用于传输的sl grant未配置关联的PSFCH资源,则第一终端设备可以忽略该sl grant,也就是复用和组装实体不为该sl grant生成对应的MAC PDU;或者,第一终端设备在根据LCH的优先级确定DST时,如果最高优先级的LCH的HARQ属性为enable,则复用和组装实体停止继续筛选LCH。
方案二:
图4为本申请实施例中的侧行链路通信方法的流程示意图三,参见图4所示,该方法可以包括:
S401:如果第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为enable,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则第一终端设备向网络侧设备发送第二请求消息;
其中,第二请求消息用于请求为终端设备(第一终端设备和/或第二终端设备)分配PSFCH资源。也就是说,第一终端设备通过该第二请求信息向网络侧设备请求用于发送MAC PDU的sl grant关联的PSFCH资源。
S402:网络侧设备响应第二请求消息,分配PSFCH资源。
第一终端设备在通过上述方法进行MAC PDU组包,可以确定该MAC PDU中每一个LCH的HARQ反馈属性,如果这些LCH的HARQ反馈属性为enable,但是用于发送MAC PDU的sl grant未配置有关联的PSFCH资源,第一终端设备向网络侧设备发送第二请求消息,网络侧设备可以根据第二请求消息为终端设备分配PSFCH资源,使得第二终端设备可以在新配置的PSFCH资源上对该MAC PDU进行HARQ反馈,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
这里,网络侧设备响应第二请求消息可以理解为,网络侧设备根据该第二请求消息确定向第一终端设备分配PSFCH资源。
在一些可能的实施方式中,第二请求消息可以包括MAC PDU的HARQ反馈属性;第一终端设备向网络侧设备发送第二请求消息,包括:第一终端设备向网络侧设备发送MAC PDU的HARQ反馈属性。
在一些可能的实施方式中,第二请求消息可以包括MAC CE或RRC信令。当然,还可以包括其他信令,本申请实施例不做具体限定。
在本申请实施例中,第二请求消息以信令的方式直接指示网络侧设备分配PSFCH资源,也可以信令的方式指示MAC PDU的HARQ反馈属性,使得网络侧设备可以根据MAC PDU的HARQ反馈属性分配PSFCH资源。
在一些可能的实施方式中,S402可以包括:网络侧设备重新配置与sl grant关联的PSFCH资源;或,网络侧设备重新分配资源池,重新分配后的资源池配置有PSFCH资源。
方案三:
图5为本申请实施例中的侧行链路通信方法的流程示意图四,参见图5所示,该方法可以包括:
S501:网络侧设备为终端设备(第一终端设备和/或第二终端设备)配置的至少一个LCH的HARQ反馈属性为enable;
S502:网络侧设备为终端设备配置资源池。
这里,此次配置的资源池中至少一个资源池配置有PSFCH资源。换句话说,配置资源池的时候,如果至少一个LCH的属性是enable,则至少一个资源池有PSFCH资源;或者,配置LCH的时候,如果至少一个LCH的属性是enable,则至少一个资源池有PSFCH资源;或者,配置LCH的时候,如果至少一个资源池有PSFCH资源,才能给一个或者多个LCH的属性配置成enable。
网络侧设备在为终端设备配置资源池的时候,如果终端设备配置了至少一个HARQ反馈属性为enable的LCH,则至少一个资源池有PSFCH资源,换句话说,如果网络侧设备为终端设备配置了至少一个资源池有PSFCH资源,网络侧设备才能为终端设备配置HARQ反馈属性为enable的LCH。或者网络侧设备在为终端设备配置LCH的时候,如果至少一个LCH的属性是enable,则至少一个资源池有PSFCH资源。那么,如果网络侧设备为终端设备配置资源池,配置的资源池中至少一个资源池配置有PSFCH资源,第二终端设备就可以在配置的PSFCH资源上对该MAC PDU进行HARQ反馈,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
在本申请实施例中,如果网络侧设备为终端设备配置一个资源池,那么,该资源池相应的配置有PSFCH资源,如果网络侧设备为终端设备配置多个资源池,那么,多个资源池中至少一个资源池必须配置有PSFCH资源。那么,如果终端设备确定MAC PDU的LCH的HARQ属性为enable,第二终端设备就可以在PSFCH资源上向第一终端设备发送MAC PDU的HARQ反馈信息。
方案四:
图6为本申请实施例中的侧行链路通信方法的流程示意图五,参见图6所示,该方法可以包括:
S601:第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为enable,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源;
S602:第一终端设备进入空闲(idle)态或第三(inactive)态,并进行资源重选;
其中,重选的资源池配置有PSFCH资源。
第一终端设备在通过上述方法进行MAC PDU组包,可以确定该MAC PDU中每一个LCH的HARQ反馈属性,如果这些LCH的HARQ反馈属性为enable,但是用于发送MAC PDU的sl grant未配置有关联的PSFCH资源,第一终端设备可以自行进入空闲态或第三态,在空闲态或者第三态,也称为非激活态下,第一终端设备可以进行资源重选,以选择配置有PSFCH资源的资源池。这样,第二终端设备在接收到MAC PDU后,就可以在重新选择的资源池对应的PSFCH资源上发送HARQ反馈,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
在一些可能的实施方式中,上述方法还包括:第一终端设备在进入空闲态或第三态后,切换至侧行链路模式2。由于在侧行链路mode2下,第一终端设备可以自行选择资源,无需网络侧设备调度,那么,第一终端设备在进入空闲态或第三态后,就可以自主进行资源重选。
方案五:
图7为本申请实施例中的侧行链路通信方法的流程示意图六,参见图7所示,该方法可以包括:
S701:第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为enable,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源;
S702:第一终端设备重新选择DST。
第一终端设备在通过上述方法进行MAC PDU组包,可以确定该MAC PDU中每一个LCH的HARQ反馈属性,如果这些LCH的HARQ反馈属性为enable,但是用于发送MAC PDU的sl grant未配置有关联的PSFCH资源,第一终端设备重新选择DST,重新选择的DST所关联的LCH的HARQ反馈属性可以为disable,如此,避免出现MAC PDU的HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
在一种可能的实施方式中,上述第一终端设备重新选择DST的过程如下:
首先,第一终端设备在满足如下第三条件的LCH或者MAC CE中选择优先级最高的LCH或者MAC CE(即第二LCH或者第二MAC CE),根据这个LCH确定通信的DST。
这里,上述第三条件可以包括:LCH的HARQ属性是disable;
进一步地,上述第三条件还可以包括以下至少一个:
1、有SL数据待传;
2、SB j>0;
3、如果本次sl grant是configured grant type1,LCH如果配置了sl-configuredSLGrantType1Allowed,这个值为true。
其中,configured grant type1用于表示侧行链路配置授权类型1;
其中,sl-configuredSLGrantType1Allowed用于表示该LCH的数据是否可以在侧行链路配置授权类型1的资源上进行传输。
需要说明的是,在本申请实施例中,第一终端设备可以从满足上述第三条件中“LCH的HARQ属性是disable”这个条件的LCH或MAC CE中选择LCH或MAC CE,也可以从满足“LCH的HARQ属性是disable”这个条件且满足上述1至3三个条件中的部分或者全部条件的LCH或MAC CE中选择LCH或MAC CE。
在本申请实施例中,第一终端设备在确定了DST后,如果跟这个DST关联的LCH中有满足如下第四条件的LCH,需要将这些LCH筛选出来,然后在所有选出来的LCH中做资源分配。
这里,上述第四条件可以包括以下至少一个:
1、有SL数据等待传输;
2、如果本次sl grant是configured grant type1,LCH如果配置了sl-configuredSLGrantType1Allowed,这个值为true;
3、LCH的HARQ反馈属性与第二LCH的HARQ反馈属性相同。
需要说明的是,在本申请实施例中,第一终端设备可以根据上述第四条件中的全部条件或者部分条件从跟上述DST关联的LCH中筛选LCH。
最后,第一终端设备将属于同一源和目的对且具有相同HARQ反馈属性的LCH的数据封装在一个MAC PDU中。
在一些可能的实施方案中,上述第三条件和第四条件还可以包括其他条件,本申请实施例对此不做具体限定。
方案六:
图8为本申请实施例中的侧行链路通信方法的流程示意图七,参见图8所示,该方法可以包括:
S801:如果第一终端设备确定MAC PDU中的LCH的HARQ反馈属性为enable,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,第一终端设备向第二终端设备发送第三请求消息;
其中,第三请求消息用于请求第二终端设备不对MAC PDU进行HARQ反馈。也就是说,第一终端设备通过该第三请求信息向第二终端请求不对MAC PDU进行HARQ反馈。
S802:第二终端设备响应第三请求消息,在收到MAC PDU后不对该MAC PDU进行HARQ反馈。
第一终端设备在通过上述方法进行MAC PDU组包,可以确定该MAC PDU中每一个LCH的HARQ反馈属性,如果这些LCH的HARQ反馈属性为enable,但是用于发送MAC PDU的sl grant未配置有关联的PSFCH资源,第一终端设备可以向第二终端设备发送第三请求消息,以请求第二终端设备不对MAC PDU进行HARQ反馈,避免出现MAC PDU的 HARQ反馈属性与UE配置的资源不匹配,进而避免不必要的重传或者因缺乏重传而导致丢包。
这里,第二终端设备响应第三请求消息可以理解为,第二终端设备根据该第三请求消息,在收到MAC PDU后不对该MAC PDU进行HARQ反馈。
在本申请实施例中,第三请求消息可以且不限于包括:控制信息。其中,控制信息可以为SCI。
相应地,在S801之前,上述方法可以包括:第一终端设备将控制信息中HARQ反馈属性配置为disable。也就是说,第一终端设备可以将控制信息中用于表示HARQ反馈属性的一个或多个比特位(如1个bits)配置为disable。那么,第二终端设备在接收到控制信息后,就可以根据该比特位,不对相应的MAC PDU进行HARQ反馈。
基于相同的发明构思,本申请实施例还提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述任一可能的实施方式所述方法的功能模块。该芯片或者片上系统包括存储器,所述存储器中存储有指令,当所述指令被所述片上系统或者芯片调用的时候,执行上述方法。图9为本申请实施例中的通信装置的结构示意图一,参见图9所示,该通信装置900可以包括:发送模块901和处理模块902;发送模块901,用于如果处理模块902确定MAC PDU中的LCH的HARQ反馈属性为非使能,且用于发送MAC PDU的sl grant已配置有关联的PSFCH资源,则向第二终端设备发送第一请求消息,第一请求消息用于请求第二终端设备对MAC PDU进行HARQ反馈,第一终端设备与第二终端设备进行侧行链路通信,MAC PDU为sl grant上的初始传输。
在一些可能的实施方式中,第一请求消息包括:控制信息;处理模块,还用于将控制信息中HARQ反馈属性配置为使能。
在一些可能的实施方式中,控制信息为SCI。
在一些可能的实施方式中,参见图9所示,通信装置900还包括:接收模块903,用于接收第二终端设备发送的HARQ反馈信息;发送模块,还用于如果HARQ反馈信息为肯定应答信息,则在PUCCH资源上发送肯定应答信息;或者,如果HARQ反馈信息为否定应答信息,则在PUCCH资源上发送否定应答信息。
需要说明的是,上述发送模块可以为发送接口、发送电路或者发送器等;上述接收模块可以为接收接口、接收电路或者接收器等;上述处理模块可以为一个或者多个处理器。
基于相同的发明构思,本申请实施例还提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述任一可能的实施方式所述方法的功能模块。该芯片或者片上系统包括存储器,所述存储器中存储有指令,当所述指令被所述片上系统或者芯片调用的时候,执行上述方法。仍参见图9所示,该通信装置900可以包括:发送模块901和处理模块902;发送模块901,用于如果处理模块902确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,忽略sl grant,MAC PDU为sl grant上的初始传输。
在一些可能的实施方式中,发送模块,具体用于不通过sl grant向第二终端设备发送MAC PDU。
在一些可能的实施方式中,上述方法还可以包括:如果处理模块在组包前确定待组包的LCH的HARQ反馈属性为使能(enable),且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则处理模块可以忽略该sl grant,如处理模块不为该sl grant生成对应的MAC PDU,即不为该sl grant组包;或者,处理模块在根据LCH的优先级确定DST时,如果最高优先级的LCH的HARQ属性为使能,则停止继续筛选LCH。
需要说明的是,上述发送模块可以为发送接口、发送电路或者发送器等;上述处理模块可以为一个或者多个处理器。
基于相同的发明构思,本申请实施例还提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述任一可能的实施方式所述方法的功能模块。该芯片或者片上系统包括存储器,所述存储器中存储有指令,当所述指令被所述片上系统或者芯片调用的时候,执行上述方法。仍参见图9所示,该通信装置900可以包括:发送模块901和处理模块902;发送模块901,用于如果处理模块902确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则向网络侧设备发送第二请求消息,第二请求消息用于请求为第一终端设备分配PSFCH资源,MAC PDU为sl grant上的初始传输。
在一些可能的实施方式中,第二请求消息可以包括MAC PDU的HARQ反馈属性;第一终端设备向网络侧设备发送第二请求消息,包括:第一终端设备向网络侧设备发送MAC PDU的HARQ反馈属性。
在一些可能的实施方式中,第二请求消息可以包括MAC CE或RRC。当然,还可以包括其他信令,本申请实施例不做具体限定。
在一些可能的实施方式中,第二请求消息用于请求网络侧设备分配与sl grant关联的PSFCH资源;或,第二请求消息用于请求网络侧设备重新分配资源池,资源池配置有PSFCH资源。
需要说明的是,上述发送模块可以为发送接口、发送电路或者发送器等;上述处理模块可以为一个或者多个处理器。
基于相同的发明构思,本申请实施例还提供一种通信装置,该通信装置可以为网络侧设备中的芯片或者片上系统,还可以为网络侧设备中用于实现上述任一可能的实施方式所述方法的功能模块。该芯片或者片上系统包括存储器,所述存储器中存储有指令,当所述指令被所述片上系统或者芯片调用的时候,执行上述方法。仍参见图9所示,该通信装置可以包括:处理模块902,用于如果为第一终端设备配置的至少一个LCH的HARQ反馈属性为使能,则为第一终端设备配置资源池,资源池中的至少一个资源池配置有PSFCH资源。
需要说明的是,上述处理模块可以为一个或者多个处理器。
基于相同的发明构思,本申请实施例还提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述任一可能的实施方式所述方法的功能模块。该芯片或者片上系统包括存储器,所述存储器中存储有指令,当所述指令被所述片上系统或者芯片调用的时候,执行上述方法。仍参见图9所示,该通信装置900可以包括:处理单元902,用于如果确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则进入空闲态或 第三态,并进行资源重选,重选的资源池配置有PSFCH资源,MAC PDU为sl grant上的初始传输。
在一些可能的实施方式中,处理单元,还用于进入空闲态或第三态后,切换至侧行链路模式2。
需要说明的是,上述处理模块可以为一个或者多个处理器。
基于相同的发明构思,本申请实施例还提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述任一可能的实施方式所述方法的功能模块。该芯片或者片上系统包括存储器,所述存储器中存储有指令,当所述指令被所述片上系统或者芯片调用的时候,执行上述方法。仍参见图9所示,该通信装置900可以包括:处理单元902,用于如果确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则重新选择通信目标DST,MAC PDU为sl grant上的初始传输。
在一些可能的实施方式中,DST为根据LCH或MAC CE确定的DST,LCH或MAC CE为满足预设条件的多个LCH或MAC CE中优先级最高的;预设条件至少包括:多个LCH或MAC CE的HARQ反馈属性为非使能。
需要说明的是,上述处理模块可以为一个或者多个处理器。
基于相同的发明构思,本申请实施例还提供一种通信装置,该通信装置可以为第一终端设备中的芯片或者片上系统,还可以为第一终端设备中用于实现上述任一可能的实施方式所述方法的功能模块。该芯片或者片上系统包括存储器,所述存储器中存储有指令,当所述指令被所述片上系统或者芯片调用的时候,执行上述方法。仍参见图9所示,该通信装置900可以包括:发送模块901和处理模块902;发送模块901,用于如果处理模块确定MAC PDU中的LCH的HARQ反馈属性为enable,且用于发送所述MAC PDU的sl grant未配置关联的PSFCH资源,向第二终端设备发送第三请求消息,第三请求消息用于请求第二终端设备不对MAC PDU进行HARQ反馈。
在一些可能的实施方式中,第三请求消息可以包括:控制信息;处理模块,用于将控制信息中HARQ反馈属性配置为非使能。
基于相同的发明构思,本申请实施例提供一种通信装置,可以为终端设备,该终端设备可以与上述一个或多个实施例中所述的第一终端设备一致。图10为本申请实施例中的终端设备的结构示意图二,参见图10所示,该通信装置1000包括:处理器1001和存储器,处理器1001与存储器1002耦合,处理器1001被配置为读取并执行存储器1002中的指令;处理器1001,被配置为如果处理器1001确定MAC PDU中的LCH的HARQ反馈属性为非使能,且网络侧设备为终端设备配置有PUCCH资源以及用于发送MAC PDU的sl grant已配置有关联的PSFCH资源,则向第二终端设备发送第一请求消息,第一请求消息用于请求第二终端设备对MAC PDU进行HARQ反馈,MAC PDU为sl grant上的初始传输。
在一些可能的实施方式中,第一请求消息包括:控制信息;处理器,还被配置为将控制信息中HARQ反馈属性配置为使能。
在一些可能的实施方式中,控制信息为SCI。
在一些可能的实施方式中,处理器,还被配置为接收第二终端设备发送的HARQ反馈信息;还用于如果HARQ反馈信息为肯定应答信息,则在PUCCH资源上发送肯定应 答信息;或者,如果HARQ反馈信息为否定应答信息,则在PUCCH资源上发送否定应答信息。
基于相同的发明构思,本申请实施例提供一种通信装置,可以为终端设备,该终端设备可以与上述一个或多个实施例中所述的第一终端设备一致。仍参见图10所示,该终端设备1000包括:该通信装置1000包括:处理器1001和存储器,处理器1001与存储器1002耦合,处理器1001被配置为读取并执行存储器1002中的指令;处理器1001,被配置为如果处理器1001确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,忽略sl grant,MAC PDU为sl grant上的初始传输。
在一些可能的实施方式中,处理器1001,被配置为不通过sl grant向第二终端设备发送MAC PDU。
在一些可能的实施方式中,处理器1001,还被配置为如果在组包前确定待组包的LCH的HARQ反馈属性为使能(enable),且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则不为该sl grant生成对应的MAC PDU;或者,处理器1001,还被配置为在根据LCH的优先级确定DST时,如果最高优先级的LCH的HARQ属性为使能,则停止继续筛选LCH。
基于相同的发明构思,本申请实施例提供一种终端设备,该终端设备可以与上述一个或多个实施例中所述的第一终端设备一致。仍参见图10所示,该终端设备1000包括:处理器1001、存储器1002和通信接口1003,处理器1001与存储器1002耦合,通信接口1003,被配置为如果处理器1001确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则向网络侧设备发送第二请求消息,第二请求消息用于请求为第一终端设备分配PSFCH资源,MAC PDU为sl grant上的初始传输。
在一些可能的实施方式中,第二请求消息包括MAC PDU的HARQ反馈属性;通信接口1003,被配置为向网络侧设备发送MAC PDU的HARQ反馈属性。
在一些可能的实施方式中,第二请求消息包括MAC控制单元CE或无线资源控制RRC信令。
在一些可能的实施方式中,第二请求消息用于请求网络侧设备分配与sl grant关联的PSFCH资源;或,第二请求消息用于请求网络侧设备重新分配资源池,资源池配置有PSFCH资源。
基于相同的发明构思,本申请实施例提供一种通信装置,可以为网络侧设备,该网络侧设备可以与上述一个或多个实施例中所述的网络侧设备一致。仍参见图10所示,该通信装置1000包括:处理器1001和存储器1002,处理器1001与存储器1002耦合,处理器1001被配置为读取并执行存储器1002中的指令;处理器1101,被配置为如果为第一终端设备配置的至少一个LCH的HARQ反馈属性为使能,则为第一终端设备配置资源池,资源池中的至少一个资源池配置有PSFCH资源。
基于相同的发明构思,本申请实施例提供一种通信装置,可以为终端设备,该终端设备可以与上述一个或多个实施例中所述的第一终端设备一致。仍参见图10所示,该通信装置1000包括:处理器1001和存储器1002,处理器1001与存储器1002耦合。处理器1001被 配置为读取并执行存储器1002中的指令;处理器1001,被配置为如果确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则进入空闲态或第三态,并进行资源重选,重选的资源池配置有PSFCH资源,MAC PDU为sl grant上的初始传输。
在一些可能的实施方式中,处理器1001,还被配置为进入空闲态或第三态后,切换至侧行链路模式2。
基于相同的发明构思,本申请实施例提供一种通信装置,可以为终端设备,该终端设备可以与上述一个或多个实施例中所述的第一终端设备一致。仍参见图10所示,该通信装置1000包括:处理器1001和存储器1002,处理器1001与存储器1002耦合。处理器1001被配置为读取并执行存储器1002中的指令;处理器1101,被配置为如果确定MAC PDU中的LCH的HARQ反馈属性为使能,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,则重新选择通信目标DST,MAC PDU为sl grant上的初始传输。
在一些可能的实施方式中,DST为根据LCH或MAC CE确定的DST,LCH或MAC CE为满足预设条件的多个LCH或MAC CE中优先级最高的;预设条件至少包括:多个LCH或MAC CE的HARQ反馈属性为非使能。
基于相同的发明构思,本申请实施例提供一种通信装置,可以为终端设备,该终端设备可以与上述一个或多个实施例中所述的第一终端设备一致。仍参见图10所示,该通信装置1000包括:处理器1001和存储器1002,处理器1001与存储器1002耦合;处理器1001,被配置为读取并执行存储器1102中的指令;处理器1101,被配置为如果处理器1001确定MAC PDU中的LCH的HARQ反馈属性为enable,且用于发送MAC PDU的sl grant未配置关联的PSFCH资源,向第二终端设备发送第三请求消息,第三请求消息用于请求第二终端设备不对MAC PDU进行HARQ反馈。
在一些可能的实施方式中,第三请求消息可以包括:控制信息;相应的,通信接口1003,还被配置为如将控制信息中HARQ反馈属性配置为非使能。
基于相同的发明构思,本申请提供一种侧行链路通信系统,包括:如上述任一可能的实施方式所述的第一终端设备和第二终端设备,以及如上述任一可能的实施方式所述的网络侧设备。
基于相同的发明构思,本申请提供一种计算机可读存储介质,计算机可读存储介质存储有指令,当指令在计算机上运行时,用于执行如上述其任一可能的实施方式所述的侧行链路通信方法。
基于相同的发明构思,本申请提供一种计算机程序或计算机程序产品,当计算机程序或计算机程序产品在计算机上被执行时,使得计算机实现如上述任一可能的实施方式所述的侧行链路通信方法。
本领域技术人员能够领会,结合本文公开描述的各种说明性逻辑框、模块和算法步骤所描述的功能可以硬件、软件、固件或其任何组合来实施。如果以软件来实施,那么各种说明性逻辑框、模块、和步骤描述的功能可作为一或多个指令或代码在计算机可读媒体上存储或传输,且由基于硬件的处理单元执行。计算机可读媒体可包含计算机可读存储媒体,其对应于有形媒体,例如数据存储媒体,或包括任何促进将计算机程序从一处传送到另一处的媒体(例如,根据通信协议)的通信媒体。以此方式,计算机可读媒体大体上可对应于 (1)非暂时性的有形计算机可读存储媒体,或(2)通信媒体,例如信号或载波。数据存储媒体可为可由一或多个计算机或一或多个处理器存取以检索用于实施本申请中描述的技术的指令、代码和/或数据结构的任何可用媒体。计算机程序产品可包含计算机可读媒体。
作为实例而非限制,此类计算机可读存储媒体可包括RAM、ROM、EEPROM、CD-ROM或其它光盘存储装置、磁盘存储装置或其它磁性存储装置、快闪存储器或可用来存储指令或数据结构的形式的所要程序代码并且可由计算机存取的任何其它媒体。并且,任何连接被恰当地称作计算机可读媒体。举例来说,如果使用同轴缆线、光纤缆线、双绞线、数字订户线(DSL)或例如红外线、无线电和微波等无线技术从网站、服务器或其它远程源传输指令,那么同轴缆线、光纤缆线、双绞线、DSL或例如红外线、无线电和微波等无线技术包含在媒体的定义中。但是,应理解,所述计算机可读存储媒体和数据存储媒体并不包括连接、载波、信号或其它暂时媒体,而是实际上针对于非暂时性有形存储媒体。如本文中所使用,磁盘和光盘包含压缩光盘(CD)、激光光盘、光学光盘、数字多功能光盘(DVD)和蓝光光盘,其中磁盘通常以磁性方式再现数据,而光盘利用激光以光学方式再现数据。以上各项的组合也应包含在计算机可读媒体的范围内。
可通过例如一或多个数字信号处理器(DSP)、通用微处理器、专用集成电路(ASIC)、现场可编程逻辑阵列(FPGA)或其它等效集成或离散逻辑电路等一或多个处理器来执行指令。因此,如本文中所使用的术语“处理器”可指前述结构或适合于实施本文中所描述的技术的任一其它结构中的任一者。另外,在一些方面中,本文中所描述的各种说明性逻辑框、模块、和步骤所描述的功能可以提供于经配置以用于编码和解码的专用硬件和/或软件模块内,或者并入在组合编解码器中。而且,所述技术可完全实施于一或多个电路或逻辑元件中。
本申请的技术可在各种各样的装置或设备中实施,包含无线手持机、集成电路(IC)或一组IC(例如,芯片组)。本申请中描述各种组件、模块或单元是为了强调用于执行所揭示的技术的装置的功能方面,但未必需要由不同硬件单元实现。实际上,如上文所描述,各种单元可结合合适的软件和/或固件组合在编码解码器硬件单元中,或者通过互操作硬件单元(包含如上文所描述的一或多个处理器)来提供。
在上述实施例中,对各个实施例的描述各有侧重,某个实施例中没有详述的部分,可以参见其他实施例的相关描述。
以上所述,仅为本申请示例性的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应该以权利要求的保护范围为准。

Claims (35)

  1. 一种侧行链路通信方法,其特征在于,包括:
    如果第一终端设备确定媒介访问控制层分组数据单元MAC PDU中的逻辑信道LCH的混合式自动重传请求HARQ反馈属性为非使能,且网络侧设备为所述第一终端设备配置有物理上行控制信道PUCCH资源以及用于发送所述MAC PDU的侧行链路授权已配置有关联的物理侧行链路反馈信道PSFCH资源,则所述第一终端设备向第二终端设备发送第一请求消息,所述第一请求消息用于请求所述第二终端设备对所述MAC PDU进行HARQ反馈,所述第一终端设备与所述第二终端设备进行侧行链路通信,所述MAC PDU为所述侧行链路授权上的初始传输。
  2. 根据权利要求1所述的方法,其特征在于,所述第一请求消息包括:控制信息;所述方法还包括:
    所述第一终端设备将所述控制信息中HARQ反馈属性配置为使能。
  3. 根据权利要求2所述的方法,其特征在于,所述控制信息为侧行链路控制信息SCI。
  4. 根据权利要求1至3任一项所述的方法,其特征在于,所述方法还包括:
    所述第一终端设备接收所述第二终端设备发送的HARQ反馈信息;
    如果所述HARQ反馈信息为肯定应答信息,则所述第一终端设备在所述PUCCH资源上发送肯定应答信息;或者,
    如果所述HARQ反馈信息为否定应答信息,则所述第一终端设备在所述PUCCH资源上发送否定应答信息。
  5. 一种侧行链路通信方法,其特征在于,包括:
    如果第一终端设备确定媒介访问控制层分组数据单元MAC PDU中的逻辑信道LCH的混合式自动重传请求HARQ反馈属性为使能,且用于发送所述MAC PDU的侧行链路授权未配置关联的物理侧行链路反馈信道PSFCH资源,则所述第一终端设备忽略所述侧行链路授权,所述MAC PDU为所述侧行链路授权上的初始传输。
  6. 根据权利要求5所述的方法,其特征在于,所述第一终端设备忽略所述侧行链路授权,包括:
    所述第一终端设备不通过所述侧行链路授权向所述第二终端设备发送所述MAC PDU。
  7. 一种侧行链路通信方法,其特征在于,包括:
    如果第一终端设备确定媒介访问控制层分组数据单元MAC PDU中的逻辑信道LCH的混合式自动重传请求HARQ反馈属性为使能,且用于发送所述MAC PDU的侧行链路授权未配置关联的物理侧行链路反馈信道PSFCH资源,则所述第一终端设备向网络侧设备发送第二请求消息,所述第二请求消息用于请求所述网络侧设备分配PSFCH资源,所述MAC PDU为所述侧行链路授权上的初始传输。
  8. 根据权利要求7所述的方法,其特征在于,所述第二请求消息包括所述MAC PDU的HARQ反馈属性;所述第一终端设备向网络侧设备发送第二请求消息,包括:
    所述第一终端设备向所述网络侧设备发送所述MAC PDU的HARQ反馈属性。
  9. 根据权利要求7或8所述的方法,其特征在于,所述第二请求消息包括MAC控制 单元CE或无线资源控制RRC信令。
  10. 根据权利要求7至9任一项所述的方法,其特征在于,所述第二请求消息,用于请求所述网络侧设备重新配置与所述侧行链路授权关联的PSFCH资源;或,用于请求所述网络侧设备重新分配资源池,所述资源池配置有PSFCH资源。
  11. 一种侧行链路通信方法,其特征在于,包括:
    如果网络侧设备为第一终端设备配置的至少一个逻辑信道LCH的混合式自动重传请求HARQ反馈属性为使能,则所述网络侧设备为所述第一终端设备配置资源池,所述资源池中的至少一个资源池配置有PSFCH资源。
  12. 一种侧行链路通信方法,其特征在于,包括:
    如果第一终端设备确定媒介访问控制层分组数据单元MAC PDU中的逻辑信道LCH的混合式自动重传请求HARQ反馈属性为使能,且用于发送所述MAC PDU的侧行链路授权未配置关联的物理侧行链路反馈信道PSFCH资源,则所述第一终端设备进入空闲态或第三态,并进行资源重选,重选的资源池配置有PSFCH资源,所述MAC PDU为所述侧行链路授权上的初始传输。
  13. 根据权利要求12所述的方法,其特征在于,所述方法还包括:
    所述第一终端设备在进入空闲态或第三态后,切换至侧行链路模式2。
  14. 一种侧行链路通信方法,其特征在于,包括:
    如果第一终端设备确定媒介访问控制层分组数据单元MAC PDU中的逻辑信道LCH的混合式自动重传请求HARQ反馈属性为使能,且用于发送所述MAC PDU的侧行链路授权未配置关联的物理侧行链路反馈信道PSFCH资源,则所述第一终端设备重新选择通信目标DST,所述MAC PDU为所述侧行链路授权上的初始传输。
  15. 根据权利要求14所述的方法,其特征在于,所述DST为根据LCH或MAC CE确定的DST,所述LCH或MAC CE为满足预设条件的多个LCH或MAC CE中优先级最高的;所述预设条件至少包括:所述多个LCH或MAC CE的HARQ反馈属性为非使能。
  16. 一种通信装置,其特征在于,包括:处理器和存储器;所述处理器与所述存储器耦合,所述处理器被配置为读取并执行存储器中的指令,以实现如权利要求1至10、和/或如权利要求12至15中任一项所述的侧行链路通信方法。
  17. 一种通信装置,其特征在于,包括:处理器和存储器;所述处理器与所述存储器耦合,所述处理器被配置为读取并执行存储器中的指令,以实现如权利要求11所述的侧行链路通信方法。
  18. 一种第一通信装置,其特征在于,所述装置包括发送模块和处理模块;
    所述发送模块用于如果所述处理模块确定媒介访问控制层分组数据单元MAC PDU中的逻辑信道LCH的混合式自动重传请求HARQ反馈属性为非使能,且网络侧设备为所述第一通信装置配置有物理上行控制信道PUCCH资源以及用于发送所述MAC PDU的侧行链路授权已配置有关联的物理侧行链路反馈信道PSFCH资源,则向第二通信装置发送第一请求消息,所述第一请求消息用于请求所述第二通信装置对所述MAC PDU进行HARQ反馈,所述第一通信装置与所述第二通信装置进行侧行链路通信,所述MAC PDU为所述侧行链路授权上的初始传输。
  19. 根据权利要求18所述的装置,其特征在于,所述第一请求消息包括:控制信 息;所述处理模块还用于:将所述控制信息中HARQ反馈属性配置为使能。
  20. 根据权利要求19所述的装置,其特征在于,所述控制信息为侧行链路控制信息SCI。
  21. 根据权利要求18至20任一项所述的装置,其特征在于,所述装置还包括:接收模块,用于接收所述第二通信装置发送的HARQ反馈信息;
    所述发送模块,还用于如果所述HARQ反馈信息为肯定应答信息,则在所述PUCCH资源上发送肯定应答信息;或者,如果所述HARQ反馈信息为否定应答信息,则在所述PUCCH资源上发送否定应答信息。
  22. 一种第一通信装置,其特征在于,所述装置包括:发送模块和处理模块;
    所述发送模块,用于如果所述处理模块确定媒介访问控制层分组数据单元MAC PDU中的逻辑信道LCH的混合式自动重传请求HARQ反馈属性为使能,且用于发送所述MAC PDU的侧行链路授权未配置关联的物理侧行链路反馈信道PSFCH资源,则忽略所述侧行链路授权,所述MAC PDU为所述侧行链路授权上的初始传输。
  23. 根据权利要求22所述的装置,其特征在于,所述发送模块用于:不通过所述侧行链路授权向第二通信装置发送所述MAC PDU。
  24. 一种第一通信装置,其特征在于,所述装置包括:发送模块和处理模块;
    所述发送模块,用于如果所述处理模块确定媒介访问控制层分组数据单元MAC PDU中的逻辑信道LCH的混合式自动重传请求HARQ反馈属性为使能,且用于发送所述MAC PDU的侧行链路授权未配置关联的物理侧行链路反馈信道PSFCH资源,则向网络侧设备发送第二请求消息,所述第二请求消息用于请求所述网络侧设备分配PSFCH资源,所述MAC PDU为所述侧行链路授权上的初始传输。
  25. 根据权利要求24所述的装置,其特征在于,所述第二请求消息包括所述MAC PDU的HARQ反馈属性;所述发送模块,用于向所述网络侧设备发送所述MAC PDU的HARQ反馈属性。
  26. 根据权利要求24或25所述的装置,其特征在于,所述第二请求消息包括MAC控制单元CE或无线资源控制RRC信令。
  27. 根据权利要求24至26任一项所述的装置,其特征在于,所述第二请求消息,用于请求所述网络侧设备重新配置与所述侧行链路授权关联的PSFCH资源;或,用于请求所述网络侧设备重新分配资源池,所述资源池配置有PSFCH资源。
  28. 一种第一通信装置,其特征在于,所述装置包括:处理模块;
    所述处理模块用于如果确定媒介访问控制层分组数据单元MAC PDU中的逻辑信道LCH的混合式自动重传请求HARQ反馈属性为使能,且用于发送所述MAC PDU的侧行链路授权未配置关联的物理侧行链路反馈信道PSFCH资源,则进入空闲态或第三态,并进行资源重选,重选的资源池配置有PSFCH资源,所述MAC PDU为所述侧行链路授权上的初始传输。
  29. 根据权利要求28所述的装置,其特征在于,所述处理模块还用于:进入空闲态或第三态后,切换至侧行链路模式2。
  30. 一种第一通信装置,其特征在于,所述装置包括:处理模块;
    所述处理模块用于如果确定媒介访问控制层分组数据单元MAC PDU中的逻辑信 道LCH的混合式自动重传请求HARQ反馈属性为使能,且用于发送所述MAC PDU的侧行链路授权未配置关联的物理侧行链路反馈信道PSFCH资源,则重新选择通信目标DST,所述MAC PDU为所述侧行链路授权上的初始传输。
  31. 根据权利要求30所述的装置,其特征在于,所述DST为根据LCH或MAC CE确定的DST,所述LCH或MAC CE为满足预设条件的多个LCH或MAC CE中优先级最高的;所述预设条件至少包括:所述多个LCH或MAC CE的HARQ反馈属性为非使能。
  32. 一种网络设备,其特征在于,所述网络设备包括:处理模块;
    所述处理模块用于如果为第一通信装置配置的至少一个逻辑信道LCH的混合式自动重传请求HARQ反馈属性为使能,则为所述第一通信装置配置资源池,所述资源池中的至少一个资源池配置有PSFCH资源。
  33. 一种侧行链路通信系统,其特征在于,包括:如权利要求18至31任一项所述的通信装置和/或如权利要求32所述的网络设备。
  34. 一种计算机可读存储介质,其上存储有计算机程序或指令,其特征在于,所述计算机程序或指令被执行时使得计算机执行如权利要求1至15中任一项所述的侧行链路通信方法。
  35. 一种计算机程序或计算机程序产品,在所述计算机程序或所述计算机程序产品在计算机上被执行时,是的计算机实现如权利要求1至15中任一项所述的侧行链路通信方法。
PCT/CN2021/085315 2020-04-09 2021-04-02 一种侧行链路通信方法、装置及系统 Ceased WO2021204085A1 (zh)

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