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WO2024032444A1 - Procédé de communication en liaison latérale et appareil de communication - Google Patents

Procédé de communication en liaison latérale et appareil de communication Download PDF

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Publication number
WO2024032444A1
WO2024032444A1 PCT/CN2023/110797 CN2023110797W WO2024032444A1 WO 2024032444 A1 WO2024032444 A1 WO 2024032444A1 CN 2023110797 W CN2023110797 W CN 2023110797W WO 2024032444 A1 WO2024032444 A1 WO 2024032444A1
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WO
WIPO (PCT)
Prior art keywords
data
terminal device
resource
information
time slot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/110797
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English (en)
Chinese (zh)
Inventor
黄海宁
杨帆
张天虹
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
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Publication of WO2024032444A1 publication Critical patent/WO2024032444A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the embodiments of the present application relate to the field of communication, and more specifically, to a sidelink communication method and a communication device.
  • terminal equipment can communicate with other terminal equipment in the resource pool.
  • PSFCH feedback resources are periodically configured in the resource pool.
  • the PSSCH resources used to transmit data and the periodically configured PSFCH feedback Resources have corresponding mapping relationships.
  • terminal equipment competes for the channel through the listen-before-talk (LBT) method, thereby obtaining the channel occupancy time (COT), and communicates with other terminal equipment based on the resources in the COT communication.
  • LBT listen-before-talk
  • COT channel occupancy time
  • Embodiments of the present application provide a sidelink communication method and communication device, which can improve the utilization of resources included in PSFCH symbols in unlicensed spectrum, and further reduce the possibility of COT interruption of terminal equipment.
  • a sidelink communication method including: a first terminal device obtains a channel access time COT, the COT includes a first time slot, and the first time slot includes a PSFCH symbol; A terminal equipment transmits target information on a first resource, the first resource is a resource in the PSFCH symbol, and the target information includes first data, second data, first feedback information and second feedback information.
  • the first data is the data to be sent by the first terminal device on the first time slot
  • the second data is the data to be received by the first terminal device on the first time slot.
  • the first feedback information is feedback information to be sent by the first terminal device
  • the second feedback information is feedback information to be received by the first terminal device.
  • the PSFCH symbol can be understood or replaced by PSFCH time domain resources, PSFCH resources, PSFCH candidate resources, PSFCH transmission opportunities, and PSFCH transmission opportunities. It can be understood that PSFCH symbols can also transmit other channels or signals other than PSFCH.
  • the first terminal device obtains a COT
  • the COT includes a first time slot
  • the first time slot includes a PSFCH symbol
  • the first terminal device uses the first resource to transmit target information, thereby reducing the need for information included in the PSFCH symbol. Waste of resources.
  • the first resource is part or all of the available resources included in the PSFCH symbol. At this time, some or all of the resources included in the PSFCH symbols are available.
  • the first terminal equipment uses the first resources, which can prevent other terminal equipment from LBT ( The channel access process is successfully executed, thereby reducing the possibility of COT interruption of the first terminal equipment.
  • the first resource may be the resource among the remaining resources that are not used. At this time, the efficiency of resource utilization in PSFCH symbols is improved and resource waste is avoided.
  • the data transmission efficiency can be improved (the code rate decreases when using more resources, which will improve the transmission reliability); when the first resource is used to transmit feedback information, the data transmission of the first terminal device can be improved reliability.
  • the resources included in the PSFCH symbol are all resources of the PSFCH symbol within the COT. That is, the resources included in the PSFCH symbol are consistent with the PSFCH symbol in the time domain and consistent with the frequency domain resources in the COT of the first terminal equipment in the frequency domain. That is to say, the time domain resource of the resource included in the PSFCH symbol is the PSFCH symbol, and the frequency domain resource is the frequency domain resource corresponding to the COT.
  • the first resource is a resource in the PSFCH symbol, which means that the first resource is consistent with the PSFCH symbol in the time domain, and may belong to the frequency domain resource in the first terminal equipment COT in the frequency domain. That is, the time domain resource of the first resource is the PSFCH symbol, and the frequency domain resource is the complete set or a subset of the frequency domain resources corresponding to the COT.
  • the target information includes first data or second data
  • the first terminal device transmits the target information on the first resource, including: the The first terminal device sends the first data on a second resource, and the second resource includes the first resource; or the first terminal device receives the second data on the second resource, The second resource includes the first resource.
  • the relationship between the first resource and the second resource is: the first resource is a resource in the PSFCH symbol and is included in the second resource, and the second resource is a resource used for PSSCH transmission.
  • resources included in the PSFCH symbols are available.
  • the time domain of the resources included in the PSFCH symbol is the PSFCH symbol
  • the frequency domain is the frequency domain included in the COT. Since the unit of channel access is a channel, the frequency domain resources included in the PSFCH symbol are the frequency domain resources of a channel, which can also be understood as an RB set or 20M.
  • the resources included in the PSFCH symbols are available means that the resources included in the PSFCH symbols are not used to transmit the third feedback information (the third feedback information is the HARQ fed back on the PSFCH resource position associated according to the position of the PSSCH resource information), the first terminal device can use the first resource to transmit data or transmit feedback information that has been unsuccessfully transmitted in the past.
  • the feedback information that has been unsuccessfully transmitted in the past may be caused by past LBT failures or due to the lack of PSFCH feedback resources in the COT. , or because the feedback timing between PSSCH and PSFCH cannot be met in the COT (the interval is at least K).
  • the feedback information that has been unsuccessfully transmitted in the past may include one or more third feedback information.
  • the resource portion included in the PSFCH symbol is available, and the target information includes one of the first feedback information and the second feedback information.
  • the first terminal device can use the first resource among the available resources to transmit the first feedback information or the second feedback information, thereby improving resource utilization.
  • the resources used to transmit the third feedback information in the PSFCH symbols are used resources.
  • the resources included in the PSFCH symbols are available resources after excluding the used resources.
  • the first resource is a resource among the available resources.
  • the second resource further includes at least one of the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the AGC symbols in the first time slot, The resources corresponding to the GAP time unit and the resources corresponding to the CPE time unit in the first time slot.
  • the first terminal device when the first terminal device uses the first resource to transmit the first data or the second data, the first terminal device can also use the resource corresponding to the AGC symbol, the resource corresponding to the GAP time unit, and the resource corresponding to the CPE time unit.
  • the resource transmits the first data or the second data, increases data transmission resources, reduces the code rate, and improves data transmission reliability.
  • the first terminal device when the first resource is used to send the first feedback information and the first terminal device sends data in the first time slot, the The resources used by the first terminal device to send the first data include resources corresponding to the GAP time unit in the first time slot; or, when the first resource is used to receive the second feedback information and the When the first terminal device receives data in the first time slot, the first terminal device is configured to receive the second data including resources corresponding to the GAP time unit in the first time slot.
  • the first time slots are all used by the first terminal device to send information
  • the GAP time unit It is a time unit used for transceiver conversion.
  • the GAP time unit can also be used for the first terminal device to transmit data, thereby increasing the number of resources. , reduce the code rate and improve the reliability of data transmission.
  • the first terminal device transmits target information on the first resource according to at least one item of first information, where the first information includes: The priority of the first data; the priority of the second data; the priority of the first feedback information; the priority of the second feedback information.
  • the first terminal device determines the specific destination based on at least one of the priority of the first data, the priority of the second data, the priority of the first feedback information, and the priority of the second feedback information. What kind of information the first resource is used to transmit. For example, the first terminal device is ready to send data in the first time slot, and the first terminal device has first feedback information that has not been successfully sent and second feedback information that has not been successfully received, then the first terminal device can send data based on the first data. The priority of the first feedback information and the priority of the second feedback information determine that the first resource is used to transmit an item with a higher priority.
  • the first terminal device transmits target information on the first resource according to at least one item of first information, where the first information includes: The delay information of the first data; the delay information of the second data; the delay information of the first feedback information; the delay information of the second feedback information.
  • Delay information can be understood as delay requirement information or packet delay budget PDB.
  • the first terminal device uses at least one of the delay information of the first data, the delay information of the second data, the delay information of the first feedback information, and the delay information of the second feedback information, The one with the shorter transmission delay. In this way, information with tight delay requirements is transmitted first, which can avoid delay in transmission of corresponding information causing failure to meet delay requirements.
  • the first terminal device may comprehensively compare the priority and delay information described above to determine what kind of information the first resource is used to transmit.
  • the method before the first terminal device transmits the target information on the first resource, the method further includes: the first terminal device according to the second Information determines that the first resource is available, and the second information includes at least one of the following: a transmission type of third data, a HARQ feedback type of the third data, an energy measurement value associated with the third data, and the Whether the first terminal device is the target terminal device of the third data, wherein the third data is data transmitted on a second time slot, and the second time slot is based on the feedback timing and the first time slot. At least one time slot determined by the slot.
  • the third data is SCI-scheduled data detected by the first terminal device in the second time slot set, or SCI-scheduled data sent by the first terminal device in the second time slot set.
  • the transmission type of the third data may be indicated in the second-level SCI that schedules the third data.
  • HARQ feedback enablement may be indicated in the second level SCI that schedules the third data.
  • the first terminal device being the target terminal device of the third data can be understood as the first terminal device receiving the third data in combination, or the first terminal device being the receiving terminal device of the third data, or the first terminal device receiving the third data according to the target
  • the source identification information (optional) and destination identification information of the terminal device determines the source of receiving the third data (the source identification information (optional) and destination identification information of the target terminal device) from the target terminal device and the internal storage of the first terminal device.
  • the identification information (optional) matches the destination identification information).
  • source identification information (optional) and destination identification information are carried in the second-level SCI and/or MAC header.
  • the source identification information can be the source ID in the second level SCI.
  • the target identification information can be the destination ID in the second level SCI.
  • the first terminal device before using the first resource to transmit the target information, the first terminal device also determines that the first resource is available based on the second information, thereby reusing the first resource to transmit the target information.
  • the first terminal device determines that the first resource is available based on the second information, including: when the second information satisfies a preset condition, the first terminal device determines that the first resource is available.
  • the first terminal device determines that the first resource is available, and the preset condition includes at least one of the following: the transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to a preset threshold; the first terminal device is not a target terminal device of the third data.
  • the first terminal device when the first terminal device determines that the data transmitted in the time slot associated with the PSFCH symbol of the first time slot does not require feedback, the feedback resource corresponding to the data is an available resource.
  • the target terminal device of the data transmitted in the associated time slot is not the first terminal device, the first terminal device may not allow the feedback information of the data to use the feedback resources in the first terminal device COT, so that the first terminal device may The above conditions determine that some or all of the resources included in the PSFCH symbols are available resources, from which the first resource is determined to be used for transmitting target information.
  • the method before the first terminal device transmits the target information on the first resource, the method further includes: the first terminal device transmits the target information to the second terminal device. Send first instruction information, the first instruction information being used to instruct the second terminal device to send the second data to the first terminal device on the second resource; or, the first terminal device Send second instruction information to the second terminal device, where the second instruction information is used to instruct the second terminal device to send the second feedback information or the second feedback information to the first terminal device on the first resource.
  • the second instruction information is used to instruct the first terminal device to send first feedback information.
  • the first terminal device may send instruction information to the second terminal device, instructing the second terminal device to use the first resource to send second data or second feedback information to the first terminal device.
  • a sidelink communication method including: a second terminal device receiving COT indication information from a first terminal device, where the time unit indicated by the COT indication information includes a first time slot, and the third A time slot includes PSFCH symbols; the second terminal equipment transmits target information on a first resource, the first resource is a resource in the PSFCH symbol, and the target information includes first data, second data, and a third One of feedback information and second feedback information, the first data is the second terminal device The data to be received in the first time slot, the second data is the data to be sent by the second terminal device in the first time slot, and the first feedback information is the data to be sent by the second terminal device in the first time slot. Feedback information to be received by the device, and the second feedback information is feedback information to be sent by the second terminal device.
  • the second terminal device receives the COT indication information of the first terminal device, and the second terminal device shares the first time slot in the COT of the first terminal device.
  • the first time slot includes PSFCH symbols.
  • the second terminal device The target information may be transmitted using a first resource among resources included in the PSFCH symbol.
  • the second terminal equipment can reduce resource waste by using the first resource.
  • the first resource is part or all of the available resources included in the PSFCH symbol. When the resources included in the PSFCH symbol are completely unused, the second terminal device transmits the target information on the first resource to prevent other terminal devices from succeeding in LBT at the PSFCH symbol, causing the COT to be interrupted.
  • the first resource may be the resource among the remaining resources that are not used. At this time, the efficiency of resource utilization in PSFCH symbols is improved and resource waste is avoided.
  • the data transmission efficiency can be improved (the code rate decreases when using more resources, which will improve the transmission reliability); when the first resource is used to transmit feedback information, the data transmission of the second terminal device can be improved reliability.
  • the target information includes first data or second data
  • the second terminal device transmits the target information on the first resource, including: the The second terminal device receives the first data on a second resource, and the second resource includes the first resource; or the second terminal device sends the second data on the second resource, The second resource includes the first resource.
  • resources included in the PSFCH symbols are available.
  • the second resource further includes at least one of the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the AGC symbols in the first time slot, The resources corresponding to the GAP time unit and the resources corresponding to the CPE time unit in the first time slot.
  • the first resource when the first resource is used to receive the first feedback information and the second terminal device receives data in the first time slot, the The resources used by the second terminal device to receive the first data include resources corresponding to the GAP time unit in the first time slot; or, when the first resource is used to send the second feedback information and the When the second terminal device sends data in the first time slot, the second terminal device is configured to send the second data including resources corresponding to the GAP time unit in the first time slot.
  • the second terminal device transmits target information on the first resource according to at least one item of first information, where the first information includes: The priority of the first data; the priority of the second data; the priority of the first feedback information; the priority of the second feedback information.
  • the second terminal device transmits target information on the first resource according to at least one item of first information, where the first information includes: The delay information of the first data; the delay information of the second data; the delay information of the first feedback information; the delay information of the second feedback information.
  • the method before the second terminal device transmits the target information on the first resource, the method further includes: the second terminal device according to the second Information determines that the first resource is available, and the second information includes at least one of the following: a transmission type of third data, a HARQ feedback type of the third data, an energy measurement value associated with the third data, and the Whether the first terminal device is the target terminal device of the third data, wherein the third data is data transmitted on a second time slot, and the second time slot is based on the feedback timing and the first time slot. At least one time slot determined by the slot.
  • the third data is SCI-scheduled data detected by the second terminal device in the second time slot set, or SCI-scheduled data sent by the second terminal device in the second time slot set.
  • the transmission type of the third data may be indicated in the second-level SCI that schedules the third data.
  • HARQ feedback enablement may be indicated in the second level SCI that schedules the third data.
  • the second terminal device determines that the first resource is available based on the second information, including: when the second information satisfies a preset condition, the second terminal device determines that the first resource is available.
  • the second terminal device determines that the first resource is available, and the preset condition includes at least one of the following: the transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to a preset threshold; the first terminal device is not a target terminal device of the third data.
  • the method before the second terminal device transmits the target information on the first resource, the method further includes: the second terminal device receives data from the first resource.
  • First instruction information of a terminal device the first instruction information is used to instruct the second terminal device to send the second data to the first terminal device on the second resource; or,
  • the second terminal device receives second instruction information from the first terminal device, and the second instruction information is used to instruct the second terminal device to send data to the first terminal device on the first resource.
  • the second feedback information before the second terminal device transmits the target information on the first resource.
  • the target information includes the second data
  • the method further includes: the second terminal device sends third indication information, and the third indication The information indicates that the second resource includes the first resource.
  • the second terminal device may send third indication information, so that the first terminal device can learn that the second terminal device uses the first resource, ensuring the reliability of data transmission.
  • a sidelink communication method including: a first terminal device obtains a channel access time COT, the COT includes a first time slot, and the first time slot includes a PSFCH symbol; A terminal device determines that a first resource is available based on second information, the first resource is a resource in the PSFCH symbol, and the second information includes at least one of the following: a transmission type of third data, the third The data HARQ feedback type, the energy measurement value associated with the third data and whether the first terminal device is the target terminal device of the third data, wherein the third data is data transmitted on the second time slot, The second time slot is at least one time slot determined based on the feedback timing and the first time slot.
  • the third data is SCI-scheduled data detected by the first terminal device in the second time slot set, or SCI-scheduled data sent by the first terminal device in the second time slot set.
  • the transmission type of the third data may be indicated in the second-level SCI that schedules the third data.
  • HARQ feedback enablement may be indicated in the second level SCI that schedules the third data.
  • the first terminal device after obtaining the COT, the first terminal device will determine the first resource available on the PSFCH symbol on the first time slot in the COT. Specifically, it may be based on whether the data transmission of the associated time slot of the first time slot is required. Feedback or whether the data transmitted in the third time slot is targeted at the first terminal equipment determines the available first resources on the PSFCH symbols, and the first resources can subsequently be used to transmit various information. For relevant details, please refer to the detailed description of step S620 of method 600 and will not be repeated here.
  • the first terminal device determines that the first resource is available based on the second information, including: when the second information satisfies a preset condition, the first terminal device determines that the first resource is available.
  • the first terminal device determines that the first resource is available, and the preset condition includes at least one of the following: the transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to a preset threshold; the first terminal device is not a target terminal device of the third data.
  • the second time slot is a time slot used by the first terminal device.
  • a sidelink communication method includes: the second terminal device receives COT indication information from the first terminal device, and the time unit indicated by the COT indication information includes the first time slot, so The first time slot includes PSFCH symbols; the second terminal equipment determines that the first resource is available according to the second information, the first resource is the resource in the PSFCH symbol, and the second information includes at least one of the following : the transmission type of the third data, the HARQ feedback type of the third data, the energy measurement value associated with the third data and whether the first terminal device is the target terminal device of the third data, wherein the third data
  • the third data is data transmitted on the second time slot, and the second time slot is at least one time slot determined based on the feedback timing and the first time slot.
  • the third data is SCI-scheduled data detected by the second terminal device in the second time slot set, or SCI-scheduled data sent by the second terminal device in the second time slot set.
  • the transmission type of the third data may be indicated in the second-level SCI that schedules the third data.
  • HARQ feedback enablement may be indicated in the second level SCI that schedules the third data.
  • step S620 of method 600 For relevant details of this embodiment, please refer to the detailed description of step S1120 of method 1100, which will not be described again here.
  • the second terminal device determines that the first resource is available based on the second information, including: when the second information satisfies a preset condition, the second terminal device determines that the first resource is available.
  • the second terminal device determines that the first resource is available, and the preset condition includes at least one of the following: the transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to a preset threshold; the first terminal device is not a target terminal device of the third data.
  • the second time slot is a time slot used by the first terminal device.
  • a sidelink communication method includes: the first terminal device determines, according to the second information, that the first resource in the PSFCH symbol on the first time slot is available, and the first time slot is located Within the COT of the first terminal device, the second information includes at least one of the following: a transmission type of the third data, a HARQ feedback type of the third data, an energy measurement value associated with the third data and the first Whether the terminal device is the target terminal device of the third data, wherein the third data is data transmitted on a second time slot, and the second time slot is determined based on the feedback timing and the first time slot at least one time slot; the first terminal device Target information is transmitted on the first resource.
  • the third data is SCI-scheduled data detected by the first terminal device in the second time slot set, or SCI-scheduled data sent by the first terminal device in the second time slot set.
  • the transmission type of the third data may be indicated in the second-level SCI that schedules the third data.
  • HARQ feedback enablement may be indicated in the second level SCI that schedules the third data.
  • the first terminal device determines the first resource available on the PSFCH symbol on the first time slot in the COT. Specifically, it may be based on whether the data transmission of the associated time slot of the first time slot requires feedback or whether the third time slot requires feedback. Whether the data transmitted on the time slot targets the first terminal device determines the first resource available on the PSFCH symbol. This first resource can subsequently be used by the first terminal device to transmit target information, thereby improving resource utilization. Further , if the PSFCH symbol resources are completely unused, the first terminal equipment can reduce the possibility of COT interruption by using the first resource. In this embodiment, details of how the first terminal device determines that the first resource is available and how to specifically use the first resource to transmit target information may refer to the corresponding details of method 600, which will not be described again here.
  • the target information includes one of first data, second data, first feedback information, and second feedback information
  • the first data is the The data to be sent by the first terminal device on the first time slot
  • the second data is the data to be received by the first terminal device on the first time slot
  • the first feedback information is The feedback information to be sent by the first terminal device
  • the second feedback information is the feedback information to be received by the first terminal device.
  • the first terminal device transmits target information on the first resource, including: when the target information includes the first data, the The first terminal device sends the first data on a second resource, and the second resource includes the first resource; when the target information includes the second data, the first terminal device sends the first data on the second resource.
  • the second data is received on a second resource, and the second resource includes the first resource; when the target information includes the first feedback information, the first terminal device receives the first data on the first resource.
  • the first terminal device determines that the first resource is available based on the second information, including: when the second information satisfies a preset condition, the first terminal device determines that the first resource is available.
  • the first terminal device determines that the first resource is available, and the preset condition includes at least one of the following: the transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to a preset threshold; the first terminal device is not a target terminal device of the third data.
  • resources included in the PSFCH symbols are available.
  • the resource portion included in the PSFCH symbol is available, and the target information includes one of the first feedback information and the second feedback information.
  • the second resource further includes at least one of the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the AGC symbols in the first time slot, The resources corresponding to the GAP time unit and the resources corresponding to the CPE time unit in the first time slot.
  • the first terminal device when the first resource is used to send the first feedback information and the first terminal device sends data in the first time slot, the The resources used by the first terminal device to send the first data include resources corresponding to the GAP time unit in the first time slot; or, when the first resource is used to receive the second feedback information and the When the first terminal device receives data in the first time slot, the first terminal device is configured to receive the second data including resources corresponding to the GAP time unit in the first time slot.
  • the first terminal device transmits target information on the first resource according to at least one item of first information, where the first information includes: The priority of the first data; the priority of the second data; the priority of the first feedback information; the priority of the second feedback information.
  • the first terminal device transmits target information on the first resource according to at least one item of first information, where the first information includes: The delay information of the first data; the delay information of the second data; the delay information of the first feedback information; the delay information of the second feedback information.
  • the method before the first terminal device transmits the target information on the first resource, the method further includes: the first terminal device transmits the target information to the second terminal device. Send first instruction information, the first instruction information being used to instruct the second terminal device to send the second data to the first terminal device on the second resource; or, the first terminal device Send second instruction information to the second terminal device, where the second instruction information is used to instruct the second terminal device to send the second feedback information to the first terminal device on the first resource.
  • a communication device including: a determining unit configured to determine, according to the second information, that the first resource in the PSFCH symbol on the first time slot is available, and the first time slot is located within the COT of the communication device.
  • the second information includes at least one of the following: a transmission type of the third data, a HARQ feedback type of the third data, an energy measurement value associated with the third data, and whether the communication device is the third data.
  • the target communication device wherein the third data is data transmitted on a second time slot, and the second time slot is at least one time slot determined according to the feedback timing and the first time slot; the transceiver unit, Used to transmit target information on the first resource.
  • the determining unit determines the first resource available on the PSFCH symbol on the first time slot in the COT. Specifically, it can be based on whether the data transmission of the associated time slot of the first time slot requires feedback or the third time slot. Whether the data transmitted on the communication device is targeted at the communication device, the communication device determines the first resource available on the PSFCH symbol. This first resource can subsequently be used by the communication device to transmit target information, thereby improving resource utilization. Furthermore, if the PSFCH symbol The resource is completely unused, and the communication device can reduce the possibility of COT interruption by using the first resource. In this embodiment, details of how the communication device determines that the first resource is available and how to specifically use the first resource to transmit target information may refer to the corresponding details of method 600, and will not be described again here.
  • the target information includes one of first data, second data, first feedback information, and second feedback information
  • the first data is the The data to be sent by the communication device on the first time slot
  • the second data is the data to be received by the communication device on the first time slot
  • the first feedback information is the data to be received by the communication device on the first time slot.
  • Feedback information to be sent is feedback information to be received by the communication device.
  • the transceiver unit is specifically configured to: when the target information includes the first data, send the first data on the second resource, The second resource includes the first resource; when the target information includes the second data, the second data is received on the second resource, and the second resource includes the first resource. ; When the target information includes the first feedback information, send the first feedback information on the first resource; when the target information includes the second feedback information, send the first feedback information on the first resource to receive the second feedback information.
  • the determining unit is specifically configured to: determine that the first resource is available when the second information satisfies a preset condition, and the preset condition Including at least one of the following: the transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or Equal to the preset threshold; the communication device is not the target communication device of the third data.
  • resources included in the PSFCH symbols are available.
  • the resource portion included in the PSFCH symbol is available, and the target information includes one of the first feedback information and the second feedback information.
  • the second resource further includes at least one of the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the AGC symbols in the first time slot, The resources corresponding to the GAP time unit and the resources corresponding to the CPE time unit in the first time slot.
  • the communication device when the first resource is used to send the first feedback information and the communication device sends data in the first time slot, the communication device
  • the resources used by the device to send the first data include resources corresponding to the GAP time unit in the first time slot; or, when the first resource is used to receive the second feedback information and the communication device is When receiving data in the first time slot, the communication device is configured to receive the second data including resources corresponding to the GAP time unit in the first time slot.
  • the transceiver unit is configured to transmit target information on the first resource according to at least one item of first information, where the first information includes : the priority of the first data; the priority of the second data; the priority of the first feedback information; the priority of the second feedback information.
  • the transceiver unit is configured to transmit target information on the first resource according to at least one item of first information, where the first information includes : the delay information of the first data; the delay information of the second data; the delay information of the first feedback information; the delay information of the second feedback information.
  • the transceiver unit is further configured to: send first indication information to a second terminal device, where the first indication information is used to instruct the second terminal device The device sends the second data to the communication device on the second resource; or sends second indication information to a second terminal device, where the second indication information is used to indicate where the second terminal device is located. Send the second feedback information to the communication device on the first resource.
  • a sidelink communication method is provided, including: the second terminal device determines that a first resource is available based on the second information, and the first resource is a PSFCH symbol on the first time slot.
  • the first time slot is within the COT of the first terminal device
  • the second information includes at least one of the following: the transmission type of the third data, the HARQ feedback type of the third data, the third data
  • how the second terminal device determines that the first resource is available and how to specifically use the first resource to transmit target information can refer to the description of how the first terminal device determines that the first resource is available and how to use it in method 600 and the description in method 1100. The corresponding description will not be repeated here for simplicity.
  • the target information includes one of first data, second data, first feedback information, and second feedback information
  • the first data is the The data to be received by the second terminal device on the first time slot
  • the second data is the data to be sent by the second terminal device on the first time slot
  • the first feedback information is Feedback information to be received by the second terminal device, where the second feedback information is feedback information to be sent by the second terminal device.
  • the second terminal device transmits target information on the first resource, including: when the target information includes the first data, the The second terminal device receives the first data on a second resource, and the second resource includes the first resource; when the target information includes the second data, the second terminal device receives the first data on the second resource.
  • the second data is sent on a second resource, and the second resource includes the first resource; when the target information includes the first feedback information, the second terminal device receives all the data on the first resource. the first feedback information; when the target information includes the second feedback information, the second terminal device sends the second feedback information on the first resource.
  • resources included in the PSFCH symbols are available.
  • the resource part included in the PSFCH symbol is available, and the target information includes the first feedback information or the second feedback information.
  • the second resource further includes at least one of the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the AGC symbols in the first time slot, The resources corresponding to the GAP time unit and the resources corresponding to the CPE time unit in the first time slot.
  • the first resource when the first resource is used to receive the first feedback information and the second terminal device receives data in the first time slot, the The resources used by the second terminal device to receive the first data include resources corresponding to the GAP time unit in the first time slot; or, when the first resource is used to send the second feedback information and the When the second terminal device sends data in the first time slot, the second terminal device is configured to send the second data including resources corresponding to the GAP time unit in the first time slot.
  • the second terminal device transmits target information on the first resource according to at least one item of first information, where the first information includes: The priority of the first data; the priority of the second data; the priority of the first feedback information; the priority of the second feedback information.
  • the second terminal device transmits target information on the first resource according to at least one item of first information, where the first information includes: The delay information of the first data; the delay information of the second data; the delay information of the first feedback information; the delay information of the second feedback information.
  • the second terminal device determines that the first resource is available based on the second information, including: when the second information satisfies a preset condition, the second terminal device determines that the first resource is available.
  • the second terminal device determines that the first resource is available, and the preset condition includes at least one of the following: the transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to a preset threshold; the first terminal device is not a target terminal device of the third data.
  • the method before the second terminal device transmits the target information on the first resource, the method further includes: the second terminal device receives data from the first resource. First instruction information of a terminal device, the first instruction information is used to instruct the second terminal device to send the second data to the first terminal device on the second resource; or, the third The second terminal device receives second instruction information from the first terminal device, and the second instruction information is used to instruct the second terminal device to send the first terminal device to the first terminal device on the first resource. 2. Feedback information.
  • the target information includes the second data
  • the method further includes: the second terminal device sends third indication information, and the third indication The information indicates that the second resource includes the first resource.
  • a communication device including: a determining unit configured to determine that a first resource is available according to second information, where the first resource is a resource in a PSFCH symbol on a first time slot, and the first resource is available.
  • a time slot is within the COT of the first terminal device, and the second information includes at least one of the following: a transmission type of the third data, a HARQ feedback type of the third data, an energy measurement value associated with the third data, and Whether the first terminal device is the target terminal device of the third data, wherein the third data is data transmitted on a second time slot, and the second time slot is based on the feedback timing and the first At least one time slot determined by a time slot; a transceiver unit, used to transmit target information on the first resource.
  • how the communication device determines that the first resource is available and how to specifically use the first resource to transmit target information can refer to the description of the first terminal device determining that the first resource is available and how to specifically use it in method 600 and the corresponding description in method 1100. , which will not be described here for brevity.
  • the target information includes one of first data, second data, first feedback information, and second feedback information
  • the first data is the The data to be received by the communication device on the first time slot
  • the second data is the data to be sent by the communication device on the first time slot
  • the first feedback information is the data to be sent by the communication device on the first time slot.
  • Feedback information to be received is feedback information to be sent by the communication device.
  • the transceiver unit is specifically configured to: when the target information includes the first data, receive the first data on the second resource, The second resource includes the first resource; when the target information includes the second data, the second data is sent on the second resource, and the second resource includes the first resource. ; When the target information includes the first feedback information, receive the first feedback information on the first resource; when the target information includes the second feedback information, send on the first resource The second feedback information.
  • resources included in the PSFCH symbols are available.
  • the resource portion included in the PSFCH symbol is available, and the target information includes the first feedback information or the second feedback information.
  • the second resource further includes at least one of the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the AGC symbols in the first time slot, The resources corresponding to the GAP time unit and the resources corresponding to the CPE time unit in the first time slot.
  • the communication device when the first resource is used to receive the first feedback information and the communication device receives data in the first time slot, the communication device
  • the resources used by the device to receive the first data include resources corresponding to the GAP time unit in the first time slot; or, when the first resource is used to send the second feedback information and the communication device is When sending data in the first time slot, the communication device is configured to send the second data including resources corresponding to the GAP time unit in the first time slot.
  • the transceiver unit is configured to transmit target information on the first resource according to at least one item of first information, where the first information includes : the priority of the first data; the priority of the second data; the priority of the first feedback information; the priority of the second feedback information.
  • the transceiver unit is configured to transmit target information on the first resource according to at least one item of first information, where the first information includes : the delay information of the first data; the delay information of the second data; the delay information of the first feedback information; the delay information of the second feedback information.
  • the determining unit is specifically configured to: when the second information satisfies a preset condition, the second terminal device determines that the first resource is available , the preset conditions include at least one of the following: the transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the third data association The energy measurement value is less than or equal to the preset threshold; the first terminal device is not the target terminal device of the third data.
  • the transceiver unit is further configured to: receive first indication information from the first terminal device, where the first indication information is used to indicate the The communication device sends the second data to the first terminal device on the second resource; or, receives second indication information from the first terminal device, the second indication information is used to indicate the The communication device sends the second feedback information to the first terminal device on the first resource.
  • the target information includes the second data
  • the transceiver unit is further configured to: send third indication information, the third indication information indicates the The second resource includes the first resource.
  • a communication device including a communication device for implementing the first aspect or any implementation manner of the first aspect to the fifth aspect or any implementation manner of the fifth aspect, the seventh aspect or any implementation manner of the seventh aspect.
  • a unit of functionality that implements a method in a manner.
  • a communication device including: a processor and a transceiver, the transceiver is used to receive computer codes or instructions and transmit them to the processor, and the processor runs the computer codes or instructions, Implement the method in the first aspect or any implementation manner of the first aspect to the fifth aspect or any implementation manner of the fifth aspect, the seventh aspect or any implementation manner of the seventh aspect.
  • An eleventh aspect provides a communication system, including: the first aspect or any implementation of the first aspect to the fifth aspect or any implementation of the fifth aspect, the seventh aspect or any one of the seventh aspect The first terminal device and the second terminal device in the method in an implementation manner.
  • a computer-readable storage medium stores a computer program; when the computer program is run on a computer, it causes the computer to execute the first aspect or any one of the first aspects.
  • FIG. 1 is a schematic diagram of a communication system 100 suitable for an embodiment of the present application.
  • Figure 2 is a schematic diagram of periodically configured PSFCH resources.
  • Figure 3 is a schematic diagram of the mapping relationship between PSSCH resources and PSFCH resources.
  • Figure 4 is a schematic diagram of the time slot structure in NR-V2X.
  • Figure 5 is a schematic diagram of a terminal device performing LBT to obtain COT.
  • Figure 6 is a schematic flow chart of a sidelink communication method 600 provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of resources used for data transmission according to an embodiment of the present application.
  • Figure 8 is a schematic diagram of resources used for data transmission according to an embodiment of the present application.
  • Figure 9 is a schematic diagram of the first terminal device obtaining COT in the embodiment of the present application.
  • Figure 10 is a schematic diagram of multiple transmission opportunities.
  • FIG 11 is a schematic flowchart of another sidelink communication method 1100 provided by an embodiment of the present application.
  • Figure 12 is a schematic block diagram of a communication device 1200 provided by an embodiment of the present application.
  • Figure 13 is a schematic block diagram of another communication device 1300 provided by an embodiment of the present application.
  • Figure 14 is a schematic block diagram of another communication device 1400 provided by an embodiment of the present application.
  • Figure 15 is a schematic block diagram of another communication device 1500 provided by an embodiment of the present application.
  • Figure 16 is a schematic block diagram of another communication device 1600 provided by an embodiment of the present application.
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • CDMA wideband code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE LTE system
  • FDD frequency division duplex
  • TDD LTE time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX global interoperability for microwave access
  • 5G fifth generation
  • 5G fifth generation
  • 5G fifth generation
  • V2X can include vehicle to network (V2N), vehicle to vehicle (V2V), vehicle to infrastructure (vehicle to infrastructure, V2I), Vehicle to pedestrian (V2P), etc.
  • LTE-V long term evolution-vehicle
  • LTE-V Internet of Vehicles
  • MTC machine type communication
  • IoT Internet of things
  • the network device in the embodiment of this application can be any device with wireless transceiver function.
  • the equipment includes but is not limited to: evolved node B (eNB), radio network controller (RNC), node B (node B, NB), radio network controller (RNC) ), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved nodeB, or home node B, HNB), base band unit (BBU), access point (AP), wireless relay node, wireless backhaul node, transmission point in the wireless fidelity (wireless fidelity, WIFI) system (transmission point, TP) or transmission and reception point (TRP), etc., which can also be 5G, such as NR, gNB in the system, or transmission point (TRP or TP), the base station in the 5G system
  • network equipment can be traditional macro base stations in the traditional universal mobile telecommunications system (UMTS)/LTE wireless communication system, and can be micro base stations in the heterogeneous network (HetNet) scenario.
  • HetNet heterogeneous network
  • the base station scenario can be a BBU and a remote radio unit (RRU), and in a cloud radio access network (cloud radio access netowrk, CRAN) scenario it can be a baseband pool (BBU pool) and RRU.
  • BBU pool baseband pool
  • network equipment may include centralized units (CUs) and DUs, or access network (radio access network, RAN) equipment including CU nodes and DU nodes.
  • CUs centralized units
  • DU access network
  • the RAN equipment including CU nodes and DU nodes separates the protocol layer of the eNB in the LTE system.
  • Some protocol layer functions are centralized controlled by the CU, and the remaining part or all protocol layer functions are distributed in In DU, the CU centrally controls the DU.
  • gNB can also include an active antenna unit (active antenna unit, AAU for short).
  • AAU active antenna unit
  • CU implements some functions of gNB
  • DU implements some functions of gNB.
  • CU is responsible for processing non-real-time protocols and services, implementing radio resource control (RRC), and packet data convergence protocol (PDCP) layer functions.
  • DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, media access control (MAC) layer and physical (physical, PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical (physical, PHY) layer.
  • AAU implements some physical layer processing functions, radio frequency processing and active antenna related functions. Since RRC layer information will eventually become PHY layer information, or transformed from PHY layer information, in this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by DU , or sent by DU+AAU.
  • the network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network equipment in the RAN, or the CU can be divided into network equipment in the core network (core network, CN), which is not limited in this application.
  • the terminal equipment in the embodiment of this application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, wireless communication equipment, user agent or user device .
  • the terminal in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an industrial Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety Wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop ( wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, wearable device, vehicle user equipment (vehicle user equipment) , VUE), vehicle equipment, vehicle communication modules, other embedded communication modules, terminals in 5
  • the terminal device can also be a terminal device in an Internet of Things (IoT) system.
  • IoT Internet of Things
  • Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-computer interconnection and object interconnection. This application does not limit the specific form of the terminal equipment.
  • the terminal device may be a device for realizing the function of the terminal device, or a device that can support the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • FIG. 1 is a schematic diagram of a communication system 100 suitable for an embodiment of the present application.
  • the communication system 100 shown in Figure 1(a) includes a network device 10, a terminal device 20, and a terminal device 21.
  • the terminal device 20 and the terminal device 21 are both within the coverage of the network device 10, and between the network device 10 and the terminal device
  • the terminal devices 20 and 21 communicate through the Uu air interface, and the terminal devices 20 and 21 communicate through the PC5 interface.
  • the communication system 100 shown in Figure 1(b) includes a network device 10, a terminal device 20, and a terminal device 21.
  • the terminal device 20 is within the coverage of the network device 10, and the terminal device 21 is within the coverage of the network device 10. outside.
  • the communication system 100 shown in Figure 1(c) includes a network device 10, a terminal device 20, a terminal device 21, and a terminal device 22. Among them, the terminal device 20 and the terminal device 21 are not within the coverage of the network device 10, and the terminal device 20 is not within the coverage of the network device 10. 22 on network devices 10 within the coverage area.
  • the terminal device 20 can communicate with the terminal device 21 through resources scheduled by the network device, which resources can be called authorized resources or authorized frequency bands; or, the terminal device 20 Communication with the terminal device 21 can be achieved through resource self-selection, that is, by selecting resources from a resource pool. This resource can be called an unlicensed resource or an unlicensed frequency band.
  • resources scheduled by the network device which resources can be called authorized resources or authorized frequency bands; or, the terminal device 20 Communication with the terminal device 21 can be achieved through resource self-selection, that is, by selecting resources from a resource pool. This resource can be called an unlicensed resource or an unlicensed frequency band.
  • the terminal device 20 and the terminal device 21 can communicate through self-selection of resources.
  • HARQ hybrid automatic repeat request
  • FEC forward error correction
  • ARQ automatic repeat request
  • the sending end After receiving the NACK signal, the sending end further transmits a part of the information bits and/or redundant bits (called redundant bits). data) to the receiving end. After receiving the retransmitted data, the receiving end combines it with the previously received data and decodes it. If the retransmitted data still cannot be decoded correctly, it can be retransmitted again. As the number of retransmissions increases, information bits and/or redundant bits continue to accumulate, and the channel coding rate continues to decrease, thereby continuously improving the decoding effect.
  • redundant bits redundant bits
  • a resource pool is a collection of time-frequency resources.
  • the resource pool is a collection of time-frequency resources used by terminal equipment in the sidelink (SL) to transmit PSSCH or receive physical sidelink share channel (PSSCH).
  • SL sidelink
  • PSSCH physical sidelink share channel
  • the network device can adopt a bitmap and periodically repeat the bitmap to indicate the set of subframes used for SL communication among all subframes of the system.
  • the network device can divide the frequency band used for SL communication into several sub-channels, and each sub-channel contains a certain number of resource blocks.
  • the physical sidelink feedback channel (PSFCH) resource represents the resource used to transmit the PSFCH.
  • a PSFCH occupies 2 consecutive orthogonal frequency division multiplexing (OFDM symbols) in the time domain and 1 physical resource block (PRB) in the frequency domain.
  • OFDM symbols orthogonal frequency division multiplexing
  • PRB physical resource block
  • PSFCH can be used to transmit feedback information.
  • the sending end carries hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback enabling information in the control information
  • the receiving end can decode the PSSCH according to the The result feeds back corresponding positive (acknowledgement, ACK) or negative (negative acknowledgment, NACK) information.
  • ACK acknowledgement
  • NACK negative acknowledgment
  • PSFCH resources may be periodic resources configured in a resource pool.
  • the period parameter is As an example, The value of can be 0, 1, 2, 4. like It means that there are no PSFCH resources in the resource pool, that is, the resources in the resource pool cannot be used to transmit PSFCH. like It means that in this resource pool, every time within a time window There will be one PSFCH resource for each time slot.
  • Figure 2 is a schematic diagram of PSFCH resources.
  • Figure 2 takes the period parameters as 1, 2, and 4 as an example to show the PSFCH configuration in the resource pool.
  • the resource pool there is a time slot in every 1 time slot, 2 time slots, and 4 time slots.
  • the slot contains PSFCH resources.
  • Timing of HARQ feedback that is, determination of time domain resources of PSFCH resources.
  • the timing of HARQ feedback is the time interval between PSSCH and PSFCH. Assume that the end position of a PSSCH transmission is in time slot n, and the corresponding time slot for HARQ feedback is the first time slot with PSFCH resources including n+k time slots and after n+k time slots. PSFCH resources It can also be called PSFCH transmission opportunity. Among them, k reflects the processing capability of the terminal, For example, k can be 2 or 3, etc.
  • the PSFCH available resources within a PSFCH feedback time slot are sequentially allocated to each sub-channel within the feedback period in a time domain first and then frequency domain manner.
  • Figure 3 shows an example of the mapping relationship between PSSCH resources and PSFCH resources.
  • the number of slots is 2
  • the number of sub-channels is 2
  • each sub-channel contains 10 PRBs, 20 PRBs can be used to transmit HARQ information, and 12 PRBs are configured to transmit HARQ information.
  • each subchannel can correspond to 3 physical resource blocks (PRBs).
  • PRBs physical resource blocks
  • subchannel (0, 0) corresponds to a subchannel index of 0 and a time slot index of 0.
  • This subchannel corresponds to the PRB index.
  • the spectrum used by wireless communication systems is divided into two categories, licensed spectrum and unlicensed spectrum.
  • the UE can use the spectrum resources based on the scheduling of the network device.
  • the following mainly introduces unlicensed spectrum.
  • transmitting devices can use spectrum resources in a competitive manner.
  • One possible way is that the sending device competes for the channel through LBT and then uses the channel resources.
  • the LBT mechanism is a channel access rule based on random back-off. That is, the terminal needs to listen to whether the channel is idle before accessing the channel and starting to send data. If it detects that the channel has been idle for a certain period of time, If the channel remains idle, the channel can be occupied. If the channel is not idle, the channel needs to wait until the channel becomes idle again before the channel can be occupied.
  • the LBT mechanism is a necessary feature for using unlicensed frequency bands, because various regions around the world have regulatory requirements for the use of unlicensed frequency bands. Various forms of terminals working with different communication protocols can only use unlicensed frequency bands if they meet regulations, thereby using spectrum resources relatively fairly and efficiently. In order to meet regulations, the 3GPP organization divides the LBT mechanism in the NR system into the following four categories:
  • Category 1 LBT (category 1 LBT): After the communication device obtains the COT, it immediately transmits data after a short switching gap (switching gap) from the receiving state, referred to as Cat 1 LBT.
  • COT refers to the time that communication equipment is allowed to occupy the channel after successfully accessing the channel. Among them, the conversion interval cannot be greater than 16us.
  • Category 2 LBT LBT without random backoff, referred to as Cat 2 LBT. That is, the communication device can send data without random backoff after detecting that the channel is idle for a fixed period of time.
  • Category 3 LBT LBT with fixed contention window and random backoff, referred to as Cat 3 LBT. That is, the communication device generates a random number N based on the contention window of a fixed size, and detects that the channel is in Data can be sent after the idle state lasts for a period of time determined by the random number N.
  • the size of the competition window is related to the minimum and maximum values of N.
  • Category 4 LBT LBT with variable contention window size and random backoff, referred to as Cat 4 LBT. That is, the communication device generates a random number N based on a variable-size contention window, and detects that the channel is idle. And data can be sent after a period of time determined by the random number N.
  • the size of the contention window is related to the minimum value and the maximum value of N, and the communication device can change the size of the contention window.
  • NR-U equipment follows the 3GPP protocol and uses the LBT mechanism as the channel access method. Specifically, NR-U equipment uses the following types of LBTs.
  • Type 1 LBT Cat 4 LBT.
  • the NR-U device needs to perform random backoff before it can access the channel and send data. Specifically, the network device or the terminal device can listen to the channel for the first time after the channel is idle for a period of extended duration (defer sensing) (record this time as T d ), and in the following steps After the counter N in 4 reaches zero, the transmission is initiated. Specifically, the counter N is adjusted by listening to the channel to obtain additional listening slot periods according to the following steps.
  • N init is a random number ranging from 0 to CW p
  • CW p is the contention window.
  • Step 3 Listen to the channel to obtain additional listening time slot periods. If the channel for the additional listening time slot period is idle, perform step 4; otherwise, perform step 5.
  • Step 5 Listen to the channel until the channel is heard to be busy within another T d or until all listening slots within another T d are detected as channel idle.
  • Step 6 If the listening time slots in another T d are all detected as channel idle, proceed to step 4; otherwise, proceed to step 5.
  • CW min,p is the minimum value of the competition window
  • CW max,p is the maximum value of the competition window
  • T m cot,p is the maximum length of COT, that is, the COT transmitted by network equipment or terminal equipment on the channel does not exceed T m cot,p .
  • Type 2A LBT Cat 2 LBT with 25us interval.
  • the NR-U device can access the channel and send data after sensing that the channel is idle for 25us.
  • Type 2B LBT Cat 2 LBT with 16us interval.
  • the NR-U device can access the channel and send data after sensing that the channel is idle for 16us.
  • Type 2C LBT Cat 1 LBT with up to 16us spacing.
  • the NR-U device does not need to listen to the channel. It can directly access the channel and send data after a conversion interval of up to 16us in the COT.
  • Figure 4 is a schematic diagram of the time slot structure of NR-V2X.
  • a time slot includes 14 symbols.
  • the time slot structure that does not include PSFCH resources is shown in Figure 4 (a).
  • the first symbol of each time slot (symbol 0 in Figure 4 (a)) is used for automatic gain control (automatic gain). control, AGC).
  • the number of symbols used to carry the physical sidelink control channel (PSCCH) in each time slot is configured on each resource pool and can be 2 to 3 symbols ( Figure 4 (a) (symbols 1 and 2), the PSCCH carries the first-level sidelink control information (SCI).
  • the last symbol of each time slot is the guard period (GP).
  • the remaining symbols in the slot can be used to transmit data and second-level SCI.
  • the time slot structure including PSFCH resources is shown in Figure 4 (b).
  • Figure 4 (b) takes the 12th symbol and the 13th symbol of the time slot as an example for carrying PSFCH.
  • the first symbol of each slot (symbol 0 in (b) of Figure 4) is used for AGC.
  • the number of symbols used to carry PSCCH in each time slot is configured on each resource pool and can be 2 to 3 symbols (symbols 1 and 2 in (b) of Figure 4).
  • the PSCCH carries the Level 1 SCI.
  • the last symbol and the 11th symbol of each time slot (symbols 10 and 13 in (b) of Figure 4) are GPs.
  • the remaining symbols in the slot can be used to transmit data and second-level SCI.
  • one slot includes 12 symbols.
  • the time slot structure that does not contain PSFCH resources and the time slot structure that contains PSFCH resources are shown in Figure 4(c) and Figure 4(d) respectively.
  • ECP only reduces PSSCH symbols, and other symbols in the time slot
  • the design is consistent, that is, the last four symbols of the slot are consistent with NCP.
  • Figure 5 shows a schematic diagram of a terminal device performing LBT to obtain COT.
  • the terminal equipment obtains the COT through LBT.
  • the COT includes time slot n+1, time slot n+2, time slot n+3 and time slot n+4, where time slot Slot n+1 and time slot n+3 are respectively preconfigured with feedback resources corresponding to PSFCH symbols.
  • this feedback resource b can be used to feed back data in time slot n and time slot n+1.
  • this application provides a sidelink communication method, which enables the preconfigured PSFCH resources to be effectively utilized when the terminal equipment communicates based on the sidelink system of the unlicensed spectrum, and reduces the occurrence of errors when the terminal equipment communicates. COT interrupt problem.
  • Figure 6 shows a sidelink communication method 600 provided by an embodiment of the present application.
  • the method includes:
  • the first terminal device obtains the channel access time COT.
  • the COT includes the first time slot, and the first time slot includes PSFCH symbols.
  • the first terminal device obtains the COT, which can be understood as the first terminal device initializing the COT, or the first terminal device initializing the COT.
  • COT can be understood as a set of time-frequency resources obtained by the first terminal device. That is to say, the first terminal device obtains the time-frequency resource set and can use or allocate resources in the time-frequency resource set.
  • the method for the first terminal device to obtain the COT includes the first terminal device obtaining the COT through a channel access process, that is, accessing the channel through LBT.
  • the first terminal device can obtain the COT from the resource pool through Type 1 LBT (ie, type 1 channel access process).
  • COT can include several time slots in the time domain.
  • the length of the COT may be S time slots, and S is a positive integer.
  • the length included in the time domain of COT can also be an absolute time length, including seconds, milliseconds, microseconds, etc.
  • the length of the COT may be J milliseconds (ms), where J is a positive integer.
  • the time domain unit of COT can also be a symbol, a subframe, or a frame, and this application does not limit this.
  • the COT may include one or more frequency domain units in the resource pool in the frequency domain.
  • the frequency domain unit may be a first resource block set.
  • the first resource block set is a set of resource blocks, which is generally referred to here, and is used to indicate a channel.
  • the first set of resource blocks can be understood as 20 MHz, which is the frequency domain unit in which the terminal equipment performs LBT.
  • the frequency domain unit may also be a sub-channel, where a sub-channel may be a set of continuous resource blocks or a set of interleaved resource blocks.
  • the set of interleaved resource blocks can be understood as a set of discrete and uniformly distributed resource blocks in the frequency domain.
  • the set of interleaved resource blocks can be understood as a set of discrete or non-continuous resource blocks in the frequency domain.
  • An interleave includes at least one resource block.
  • the number of resource blocks included in the interleaving may be preconfigured or configured or predefined.
  • Interleaving can be understood as RB interleaving, sub-channel, RB set, discrete RB set, and interleaving.
  • the number of resource blocks included in an interlace can be related to the subcarrier spacing.
  • a time slot including PSFCH resources includes M interlaces.
  • Interleaving m ⁇ 0,1,...,M-1 ⁇ among M interleavings consists of common resource blocks ⁇ m,M+m,2M+m,3M+m,... ⁇ , where M is a numbering table 1 gives the number of interleaves.
  • a common resource block is the common resource block where the bandwidth part/channel/resource pool/spectrum/partial bandwidth/set of resource blocks starts with respect to common resource block 0.
  • the index subcarrier spacing ⁇ can be deleted.
  • a common resource block can be understood as a resource block included in a time slot.
  • the terminal equipment expects that the number of common resource blocks in the interlace contained in the bandwidth part/channel/resource pool/spectrum/partial bandwidth/resource block set i is not less than 10.
  • the number of PRBs in the interleaving corresponding to different subcarrier spacing is shown in Table 2.
  • the subchannel is a set of continuous resource blocks or a set of interleaved resource blocks, which may be indicated by the network device or preconfigured.
  • the sub-channels of different channels are a set of interleaved resource blocks or a set of continuous resource blocks, they can be the same (The sub-channels of multiple channels are all sets of continuous resource blocks or the sub-channels of multiple channels are all sets of interleaved resource blocks) or independently configured or indicated (the network device configures or indicates the sub-channel separately for each channel) Whether the set of included resource blocks is interleaved or contiguous).
  • different channels include PSCCH, PSSCH, physical sidelink broadcast channel (physical sidelink broadcast channel, PSBCH), PSFCH, etc.
  • COT may include one or more channels or one or more sub-channels in the frequency domain.
  • a resource pool may include one or more first resource block sets (RB sets, channels). In order to avoid interference between different channels, there is a guard band between two adjacent first resource block sets.
  • the protection bandwidth is also called intra-cell protection bandwidth and includes one or more resource blocks.
  • the protection bandwidth can be configured on the resource pool or pre-configured on the resource pool.
  • resource block (RB) described in the specification can be understood as PRB or virtual resource block (VRB).
  • the first terminal device may perform a channel access procedure on one or more channels.
  • the channel access process is performed independently on each channel.
  • the first terminal device may successfully access one of the channels or may successfully access multiple channels.
  • the guard bandwidth between two adjacent first resource block sets can be used to transmit data, thereby improving resource utilization.
  • PSFCH symbols are time domain resources used to transmit PSFCH.
  • the symbols in the PSFCH symbols here can also be replaced by other time domain units or time domain granularities.
  • the PSFCH symbol may be one symbol or multiple symbols.
  • PSFCH symbols can also be understood as resources used to transmit PSFCH.
  • PSFCH resources can be configured or pre-configured within the resource pool.
  • PSFCH resources are configured at the system level, and terminal devices in the resource pool have a consistent understanding of the PSFCH resources in the resource pool.
  • PSFCH resources can be configured periodically or according to patterns. The pattern may come from a PSFCH resource pattern set configured or preconfigured by the network device. According to the pattern, the first terminal device can determine the time slot including PSFCH resources in the resource pool.
  • the PSFCH resources configured at the system level can be understood as candidate PSFCH resources. That is, it is configured to transmit the PSFCH but may not be used to transmit the PSFCH and is used to transmit other channels or signals.
  • the position of the time slot including the PSFCH resource in the COT can be determined based on the starting position and length of the COT and the position of the time slot including the PSFCH resource in the resource pool.
  • the starting position and length of the COT are different, and the position of the time slot including the PSFCH resource in the COT is different.
  • the location of the time slot including the PSFCH resource in the COT may be indicated by the first terminal device using the first field after initializing the COT.
  • the first field may be in the first-level SCI, or the second-level SCI or MAC control Fields in the unit (MAC control element, MAC CE).
  • the first-level SCI includes this field, and the delay is lower than that of the second-level SCI and MAC CE.
  • the second-level SCI includes this field, and the delay is lower than that of MAC CE.
  • This field is included in the MAC CE and can carry more bits and therefore more information.
  • the location of the time slot including the PSFCH resource in the COT can be determined based on the pattern.
  • the pattern may come from a PSFCH resource pattern set configured or preconfigured by the network device. According to the pattern, the first terminal device can determine the time slot including PSFCH resources in the resource pool.
  • the PSFCH symbols correspond to the resources used to transmit PSFCH in the resource pool, and the COT initialized by the first terminal device may include more than one time slot including PSFCH resources.
  • the first terminal equipment can multiplex PSSCH and HARQ feedback information when it needs to send or receive HARQ feedback information in the COT.
  • the first terminal device may send COT indication information to indicate HARQ feedback information and PSSCH multiplexing.
  • the first terminal device may send PSCCH and PSSCH, where PSCCH indicates HARQ feedback information and PSSCH multiplexing.
  • the PSCCH includes a field, which occupies 1 bit, and the 1 bit is used to indicate whether the PSSCH scheduled by the PSCCH includes HARQ feedback information.
  • the HARQ feedback information can be carried in the second-level SCI or MAC CE, or the HARQ feedback information can be carried in the PSSCH through puncturing or rate matching.
  • the HARQ feedback information can start from the resource element (resource element, RE) with the lowest frequency domain index of the previous symbol of the PSSCH demodulation reference signal (demodulation reference signal, DMRS), and proceed from low to high in the frequency domain. Domains are punched in order from front to back.
  • HARQ feedback information can continue to be mapped after the mapping of the second-level SCI is completed. According to the method of first frequency domain from low to high and then time domain from front to back, mapping starts from the end symbol of the second-level SCI.
  • the HARQ feedback information and PSSCH multiplexing method may be enabled or disabled by the network device. Assuming that the network device enables HARQ feedback information and PSSCH multiplexing, the first terminal device can instruct HARQ feedback information and PSSCH multiplexing.
  • the HARQ feedback information and the PSSCH multiplexing method may be enabled or disabled by the first terminal device.
  • the enabling or disabling information can be carried in the COT indication information.
  • the first terminal device transmits target information on the first resource.
  • the first resource is the resource in the PSFCH symbol.
  • the target information includes one of the first data, the second data, the first feedback information and the second feedback information.
  • the first data is the data to be sent by the first terminal device in the first time slot
  • the second data is the data to be received by the first terminal device in the first time slot
  • the first feedback information is the data to be sent by the first terminal device.
  • Feedback information, the second feedback information is feedback information to be received by the first terminal device.
  • the first terminal device uses the first resource in the PSFCH symbol to transmit the target information.
  • the first resource is an unoccupied resource in the PSFCH symbol, and the first terminal device can use the unoccupied first resource to transmit one of the first data, the second data, the first feedback information, and the second feedback information.
  • the first resource is a resource among unoccupied resources among the resources included in the PSFCH symbol. That is to say, in addition to the first resource, the PSFCH symbol may also have other unoccupied resources.
  • the PSFCH symbol may include M interlaces, and the M interlaces are available resources.
  • the first resource may be one or more of the M interlaces, where M is a positive integer.
  • the HARQ type that implicitly determines the PSFCH resource location based on the PSSCH resource location
  • the HARQ type that explicitly indicates the PSFCH resource location
  • the former is called third feedback information in this application
  • the latter is called first feedback information or second feedback information in this application.
  • the display indication can be understood as because the data and feedback information are not implicitly determined based on the location of the time-frequency resource of the PSSCH.
  • the terminal device that needs to send the feedback information indicates the resource carrying the feedback information. That is, the terminal device that needs to send feedback information instructs the terminal device that receives the feedback information in which resource to receive the feedback information; or the terminal device that sends the data instructs the terminal device that receives the data in which resource to send feedback on the data.
  • the unoccupied resources in the PSFCH symbols are resources that are not used by Type 1 HARQ, that is, the PSFCH resources are determined based on the PSSCH resource location and are not used (that is, available, or can be reused or reused).
  • the PSFCH resources are determined based on the PSSCH resource location and are not used (that is, available, or can be reused or reused).
  • For specific conditions that are not used or available please refer to or quote the description in "The following describes the specific method of determining whether the first resource is available in this application.” (that is, the method described under this step can be used).
  • the first terminal device transmits the target information on the first resource, including: when the target information includes the first data, the first terminal device sends the first data on the second resource, and the second resource including the first resource; in the case where the target information includes the second data, the first terminal device receives the second data on the second resource, and the second resource includes the first resource; in the case where the target information includes the first feedback information, The first terminal device sends the first feedback information on the first resource; when the target information includes the second feedback information, the first terminal device receives the second feedback information on the first resource.
  • the second terminal device receives the first data on the second resource, and the second resource includes the first resource; when the target information includes the second data, the second terminal device sends the second data on the second resource, and the second terminal device sends the second data on the second resource.
  • the second resource includes the first resource; when the target information includes the first feedback information, the second terminal device receives the first feedback information on the first resource; when the target information includes the second feedback information, the second terminal device Send second feedback information on the first resource.
  • the second resources also include resources corresponding to the PSSCH symbols on the first time slot. That is, the first terminal device uses the second resource including the PSFCH symbol and the PSSCH symbol to send the first data or receive the second data. That is, the symbols used to transmit the PSSCH include symbols configured to transmit the PSSCH and symbols configured to transmit the PSFCH but not actually used. At this time, PSFCH symbols are actually used to transmit PSSCH. In this way, more symbols are used to transmit PSSCH, which can utilize resource utilization efficiency and reduce the code rate of data transmission. At the same time, COT interruption caused by PSFCH symbols not transmitting any signal is also avoided.
  • the target information may include the third First feedback information or second feedback information.
  • the first terminal device can use the first resource among the unoccupied resources to send the first feedback information;
  • the first terminal device may use the first resource among the unoccupied resources to receive the first feedback information.
  • the target information may include one of the first data, the second data, the first feedback information, and the second feedback information.
  • the first terminal device may transmit the above four kinds of information using the first resource among the resources included in the PSFCH symbol.
  • the resources included in the PSFCH symbols can be understood as All frequency domain resources under PSFCH symbols. In the frequency domain, if the first terminal equipment only obtains the resources of a first resource block set (20MHz) when initializing the COT, the frequency domain resource corresponding to the PSFCH symbol is the frequency domain within the frequency domain range of the first resource block set. domain resources; if the first terminal equipment obtains the resources of two or more first resource block sets (20MHz) when initializing the COT, the frequency domain resources corresponding to the PSFCH symbols are the frequency domain resources of the two or more first resource block sets. domain resources.
  • the determination process of whether the resources included in the PSFCH symbols are not occupied or part of the resources are occupied can be referred to the detailed description below.
  • the first terminal device transmits the target information on the first resource according to at least one item of the first information.
  • the first information includes: the priority of the first data; the priority of the second data; The priority of the first feedback information; the priority of the second feedback information.
  • the priority is carried in the first level SCI (SCI-1) in the PSCCH.
  • SCI-1 includes the priority field, frequency domain resource assignment (frequency resource assignment, FRIV) field, time domain resource assignment (time resource assignment, TRIV) field, and resource reservation period.
  • the first terminal device may determine the type of target information transmitted on the first resource according to the priority value indicated by the priority field in SCI-1.
  • the target information transmitted by the first terminal device on the first resource is related to the candidate information that the first terminal device needs to send.
  • the first terminal device can send data within the initial COT, or can share the COT with other terminal devices, that is, other terminal devices send data to the first terminal device, and correspondingly, the first terminal device receives data from other terminal devices.
  • the candidate information includes the first data
  • the candidate information may include second data.
  • the first terminal device either sends data or receives data, but cannot receive and send data at the same time.
  • the candidate information may include at least one of first feedback information and second feedback information.
  • the candidate information may include the first feedback information; if the first terminal device is in the first If the data sent before the time slot contains feedback information that has not been received from the target terminal device of the data, the candidate information may include second feedback information.
  • the first feedback information and the second feedback information may be caused by a channel access procedure (LBT) failure when the first terminal device or a counterpart terminal device (target terminal device) of the first terminal device transmits the PSFCH.
  • LBT channel access procedure
  • the PSFCH resources transmitted here are resources implicitly determined based on the time-frequency resource location of the PSSCH.
  • the candidate information includes first data, first feedback information and second feedback information, that is, the target information is one of the first data, first feedback information and second feedback information
  • the target information is one of the first data, first feedback information and second feedback information
  • the first feedback information is feedback information to be sent by the first terminal device.
  • the first feedback information may include 1-bit or multi-bit HARQ information. It can also become a HARQ codebook.
  • the first feedback information may include at least one of source terminal device identification information, destination terminal device identification information, transmission type, new data flip indication, and HARQ process number.
  • the first feedback information includes N-bit HARQ information.
  • it may include N-bit HARQ, and source terminal device identification information, destination terminal device identification information, transmission type, and new data associated with N-bit HARQ respectively.
  • Flip indication new data indicator, NDI
  • the purpose is that the target terminal device for the first terminal device can understand which data packet the HARQ bits are.
  • the first terminal device may receive SCI information of the data in the time slot in which the data is received, and the SCI information indicates the priority of the data.
  • the priority of the first feedback information is the highest priority among the priorities of the multiple TBs corresponding to the first feedback information.
  • the HARQ-ACK information included in the first feedback information is 4 bits, each of which is 1101.
  • the value of 1 of the HARQ information represents ACK, and the value of 0 represents NACK.
  • the priority values corresponding to the 4 bits are 1, 2, 3, and 4 respectively, then the priority value of the first feedback information is 1.
  • the priority value range of TB is 1,2,3,4,5,6,7,8. The smaller the value, the higher the priority and the more important the data.
  • the second feedback information is the feedback information to be received by the first terminal device.
  • the first terminal device When sending the data corresponding to the second feedback information, the first terminal device has already sent the SCI information of the data, and the SCI information will indicate the priority of the data.
  • the second feedback information may include 1-bit or multi-bit HARQ information. It can also become a HARQ codebook.
  • the optional second feedback information may include at least one of source terminal device identification information, destination terminal device identification information, transmission type, new data flip indication, and HARQ process number.
  • the second feedback information includes N-bit HARQ information, correspondingly, it may include N-bit HARQ, so that and N-bit HARQ are respectively associated with at least one of source terminal device identification information, destination terminal device identification information, transmission type, new data flip indication, and HARQ process number.
  • the purpose is that the target terminal device for the first terminal device can understand which data packet the HARQ bits are.
  • the priority of the second feedback information is the highest priority among the priorities of the multiple TBs corresponding to the first feedback information.
  • the HARQ-ACK information included in the second feedback information is 4 bits, each of which is 1101.
  • the value of 1 of the HARQ information represents ACK, and the value of 0 represents NACK.
  • the priority values corresponding to the 4 bits are 1, 2, 3, and 4 respectively, then the priority value of the second feedback information is 1.
  • the priority value range of data (TB) here is 1, 2, 3, 4, 5, 6, 7, 8. The smaller the value, the higher the priority and the more important the data.
  • the terminal device can determine the target information to be transmitted based on the priority of the first data, the priority of the first feedback information and the priority of the second feedback information.
  • the target information can be the highest priority (the smallest priority value) among the three. of an item.
  • the first terminal device can obtain the SCI information of the data transmitted in the first data in the first time slot, so that the priority of the second data can be obtained from the SCI information.
  • the first terminal device will The first resource is used to transmit the item with the highest priority (the smallest priority value).
  • the first terminal device determines whether the first resource is used to transmit data or feedback information based on the priority of the feedback information and the priority of the data. That is, the first terminal device can first compare the priorities between the data and the feedback information, and determine to transmit the data or transmit the feedback information.
  • the first terminal device may use the priority of the first data or the second data as the priority of the data, where the priority of the data ranges from 1, 2, 3, 4, 5, 6, 7, and 8. Small means the highest priority, the more important the data.
  • the priority of the feedback information is the priority of the HARQ-related data included in the feedback information. When the feedback information includes more than one HARQ bit, The priority of the feedback information is the highest priority among the priorities of the HARQ-related data included in the feedback information.
  • the first resource is used to transmit data, it is determined whether the target information is the first data or the second data according to whether the first terminal device is to send data or to receive data in the first time slot. If the first resource is used to transmit feedback information, it is determined whether the first resource is used to transmit the first feedback information or the second feedback information based on the priority of the first feedback information and the priority of the second feedback information.
  • the information to be selected includes the first data, the first feedback information, and the second feedback information.
  • the first terminal device first compares the priority of the first data with the priority of the feedback information (the higher priority of the priority of the first feedback information and the priority of the second feedback information). Assuming that the priority of the first data is higher, the first resource is used to send the first data; assuming that the priority of the feedback information is higher, the priority of the first feedback information and the priority of the second feedback information are further compared, If the priority of the first feedback information is higher, the first resource is used to send the first feedback information; if the priority of the second feedback information is higher, the first resource is used to receive the second feedback information.
  • the higher the priority the smaller the priority value.
  • a low priority means a large priority value.
  • the priority value corresponding to the first data is 1, the priority value of the first feedback information is 2, and the priority value of the second feedback information is 4, then the priority value of the feedback information is 2 (whichever is between 2 and 4). 2), the priority of the first data is higher than the priority of the feedback information (1 less than 2 means higher priority).
  • the first terminal device may directly compare the priorities of the first data, the first feedback information and the second feedback information, and use the first resource for the item with the highest priority (the smallest priority value) among them.
  • the information to be selected includes second data, first feedback information, and second feedback information
  • the information to be selected includes the second data and the first feedback information
  • the first terminal device compares the priority of the second data with the priority of the first feedback information. If the priority of the first feedback information is higher, the first resource is used to send the first feedback information. The priority of the second data is higher. If high, the first resource is used to receive the second data.
  • the information to be selected includes second data and second feedback information
  • the information to be selected includes the first data and the first feedback information
  • the information to be selected includes the first data and the second feedback information
  • Scenario 6 The information to be selected includes the first data
  • the first resource is used to transmit the first data.
  • the information to be selected includes second data
  • the first resource is used to transmit the second data.
  • the first terminal device transmits target information on the first resource according to at least one item of first information.
  • the first information includes: delay information of the first data; delay information of the second data. ; The delay information of the first feedback information; the delay information of the second feedback information.
  • the first terminal device may also determine what kind of information the first resource is used to transmit based on the delay information. Still taking the example that the candidate information includes the first data, the first feedback information and the second feedback information, that is, the target information is one of the first data, the first feedback information and the second feedback information, we will introduce the method based on the delay information. The process of determining target information among candidate information. Specifically, the shorter the delay, the more important the data is.
  • the candidate information includes first data, first feedback information and second feedback information.
  • the first terminal device compares the delay requirements corresponding to the first data, the first feedback information and the second feedback information and determines the one with the smallest delay requirement value.
  • the first resource is used for corresponding transmission.
  • the delay information can be a packet delay budget (packet budget delay, PDB), which can be carried in the first-level SCI, the second-level SCI, MAC CE or PC5 RRC signaling. Specific delay requirements can be obtained through delay information.
  • PDB packet delay budget delay
  • the first terminal device may first compare the values of the delay requirements of the data and the feedback information, and determine the information with the smaller value of the transmission delay requirement. That is, the first resource is used to transmit data, or the first resource is used to transmit feedback information.
  • the delay requirement of the data may be the higher delay requirement of the first data and the second data, that is, the smaller delay requirement.
  • the delay requirement of the feedback information may be the first feedback information and the second feedback information. The delay requirement in the information is higher or the value of the delay requirement is smaller.
  • the first terminal device may send the first data or receive the second data in the first time slot according to the needs of the first terminal device, and use the first resource to transmit the first data or transmit the second data. That is, the first terminal device sends the first data in the first time slot, and the resource for sending the first data includes the first resource. That is, the first terminal device receives the second data in the first time slot, and the resource for receiving the second data includes the first resource.
  • the first resource is used to transmit the feedback information. Assuming that the feedback information includes first feedback information and second feedback information, the first terminal device can further compare the values of the delay requirements of the first feedback information and the second feedback information, and use the first resource to determine the transmission delay requirement. feedback information with a smaller value. If the delay requirement of the first feedback information is smaller, the first resource is used to transmit the first feedback information. If the delay requirement of the second feedback information is smaller, the first resource is used to transmit the second feedback information.
  • the first terminal device can directly compare the delay requirements of the first data, the first feedback information and the second feedback information, and use the first resource to transmit the one with a smaller delay requirement. .
  • the priority order and delay requirements of the first data, the second data, the first feedback information, and the second feedback information may also be configured or preconfigured by the network device.
  • the above describes the process of determining the target information to be transmitted based on priority and delay information respectively.
  • the target information to be transmitted can also be determined based on a combination of priority and delay information. The specific process is not discussed here. Repeat.
  • the resources used by the first terminal device to send the first data include those in the first time slot. resources corresponding to the GAP time unit; or, when the first resource is used to receive the second feedback information and the first terminal device receives data in the first time slot, the first terminal device is used to receive the second data including the first time slot.
  • the resource corresponding to the GAP time unit in .
  • the GAP time unit is the time unit in the first slot.
  • the GAP time unit is the time unit used for transceiver conversion.
  • the GAP time unit can be the time unit corresponding to the GP symbol in the time slot (that is, the GAP time unit is the GP symbol), or it can be a time unit shorter than the GP symbol.
  • the cyclic prefix extension (CPE) method can be used to shorten the length of the GP symbols. Taking the time slot configured with PSFCH resources as shown in Figure 4(b) as an example, CPE copies a period of time starting from the starting position of the next symbol (symbol 11) of the GP symbol, and shifts the period to the GP symbol. symbol, and the end position of the copy duration is at the end position of the GP symbol.
  • the result after performing CPE on the time slot shown in (b) of Figure 4 is as shown in (e) of Figure 4 .
  • the terminal device Since the terminal device requires processing time for transceiver conversion between sending information and receiving information, there are GP symbols between PSSCH symbols and PSFCH symbols. GP symbols are used for transceiver conversion.
  • the transmission directions of PSSCH and PSFCH may be the same or different.
  • the transmission directions of PSSCH and PSFCH are the same, that is, the first terminal device sends PSSCH and PSFCH Or the first terminal equipment receives PSSCH and PSFCH, then the first terminal equipment does not need GP symbols.
  • the transmission directions of PSSCH and PSFCH are different, that is, the first terminal equipment sends PSSCH and receives PSFCH. Or the first terminal equipment receives the PSSCH and sends the PSFCH.
  • the first terminal device then requires a GP symbol.
  • the GP notation here also applies to GAP time units (that is, replaced by GAP time units).
  • the first time slot is used for the first terminal device to send data and feedback information. Since sending data and sending feedback information are not When it comes to transceiver conversion, the GAP time unit originally used for transceiver conversion can be used to send data. Therefore, in addition to the resources corresponding to the original PSSCH symbols, the data transmission resources can also include GAP time units; that is to say, when the first terminal device When sending data and feedback information in the first time slot within the COT, the GAP time unit in the PSSCH symbol and PSFCH symbol is used to transmit data.
  • the GAP time unit can be a copy of the previous symbol (GAP time unit is a GP symbol) or a copy of part of the resources in the previous symbol (a copy of the tail of the previous symbol, in which case the length of the GAP time unit is less than one symbol) .
  • the GAP time unit is a copy of the next symbol or a copy of part of the resources in the next symbol (a copy of the header of the next symbol, in which case the length of the GAP time unit is less than one symbol).
  • the GAP time unit may also carry valid bit information, that is, the resources used by PSSCH for rate matching include resources included in the GAP time unit.
  • the first time slot is used for the first terminal device to receive information and does not involve transceiver conversion, then it is originally used for transceiver
  • the converted GAP time unit can also be used by the first terminal device to receive data. That is to say, the resources used to transmit PSSCH in the first time slot include resources included in the GAP time unit. Specifically, the resources included in the GAP time unit are used for rate matching (that is, transmitting effective bit information), so the resources used to transmit data in the first time slot increase, reducing the PSSCH transmission code rate. The lower the code rate, the lower the reliability. The stronger. Improved data transmission reliability.
  • the GAP time unit can be a copy of the previous symbol or the tail of the previous symbol (when the length of the GAP time unit is less than one symbol), or the GAP time unit can be a copy of the next symbol or a copy of the head of the next symbol. (When the GAP time unit length is less than one symbol).
  • the second resource may also include at least one of the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the GAP time unit in the first time slot , the resources corresponding to the CPE time unit in the first timeslot, and the resources corresponding to the GP symbols in the first timeslot (the last symbol of the first timeslot).
  • the following takes the structure of the first time slot as shown in Figure 4(b) as an example to introduce the specific resources used to transmit the first data and the second data when the target information is the first data or the second data.
  • the first terminal device sends the first data in the second resource in the first time slot.
  • the frequency domain resource of the second resource is the frequency domain resource corresponding to the PSSCH symbol (the frequency domain resource occupied by PSSCH transmission within the COT).
  • the time domain resource of the second resource also Can include at least one of the following:
  • GP symbol that is, GAP time unit, the time interval between PSSCH symbol and AGC symbol
  • AGC symbol the previous symbol of PSFCH symbol
  • GP symbol GP symbol at the end of the time slot
  • the time domain resource of the second resource may include at least one of the following:
  • Case 1-1 PSSCH symbol, PSFCH symbol, GP symbol (the time interval between the PSSCH symbol and the AGC symbol), AGC symbol (the previous symbol of the PSFCH symbol).
  • Case 1-2 PSSCH symbol, PSFCH symbol, GP symbol (time interval between PSSCH symbol and AGC symbol), AGC symbol (previous symbol of PSFCH symbol), GP symbol (GP symbol at the end of the slot).
  • Case 2-1 PSSCH symbol, PSFCH symbol, AGC (previous symbol of PSFCH symbol) symbol.
  • Case 2-2 PSSCH symbol, PSFCH symbol, AGC (previous symbol of PSFCH symbol) symbol, GP symbol (GP symbol at the end of the slot).
  • Case 3-1 PSSCH symbol, PSFCH symbol.
  • Case 3-2 PSSCH symbol, PSFCH symbol, GP symbol (GP symbol at the end of the slot).
  • Case 4-1 PSFCH symbol, PSFCH symbol, GP symbol (time interval between PSSCH symbol and AGC symbol).
  • Case 4-2 PSFCH symbol, PSFCH symbol, GP symbol (time interval between PSSCH symbol and AGC symbol), GP symbol (GP symbol at the end of the slot).
  • the above AGC symbol is the PSFCH AGC symbol, and the AGC symbol itself is a copy of the PSFCH symbol, that is, the content on the PSFCH symbol is completely copied into the AGC symbol, or it can be understood that the AGC symbol is a repetition of the PSFCH symbol.
  • the AGC symbol is also used to transmit the data. It can be understood that the AGC symbol is still the complex of the PSFCH symbol. system, that is, the data included in the PSFCH symbol.
  • the AGC symbol may not be a copy of the PSFCH symbol, but may be directly used to transmit effective bit information, that is, the AGC symbol may be included when the PSSCH rate is matched. The specific situation is explained in Figure 7 below:
  • FIG 7 shows a scenario in which the resource (symbol 12) included in the PSFCH symbol is used for data transmission according to an embodiment of the present application. Then symbols 1 to 9 and symbol 12 can be used for Data transfer (case 3-1).
  • the data transmission directions of the first time slot and the time slot after the first time slot are consistent, that is, the first terminal device sends data in the first time slot and the time slot after the first time slot, or the first time slot If a terminal device receives data in the first time slot and the time slot after the first time slot, the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit the PSSCH include symbol 13 (case 3-2).
  • the GAP time unit used for transceiver conversion GP symbol or symbol 10
  • the symbol no longer requires transceiver conversion or automatic gain control and can therefore be used to transmit data. That is, when the PSFCH symbol is used to transmit data, the AGC symbol of the PSFCH symbol, the GP symbol between the PSSCH symbol and the PSFCH AGC symbol can be used to transmit data (as shown in Figure 7(b)- Figure 7(d))
  • (b) of FIG. 7 shows a scenario in which the resource corresponding to the AGC symbol (symbol 11) is used to transmit data (case 2-1).
  • the AGC symbol in (a) of Figure 7 is used for automatic gain control, what is transmitted in this symbol is data obtained by copying the data of the PSFCH symbol (symbol 12), and the AGC symbol is not used for rate matching. That is, the first time slot includes PSFCH symbols. PSFCH symbols can actually be used to transmit PSSCH, but the AGC symbols before the PSFCH symbols are copies of the PSFCH symbols. That is, the data carried in the PSFCH AGC symbols is the same data as the PSFCH symbols. The function of PSFCH AGC is still AGC.
  • the resource pool includes at least one first resource block set (RB set).
  • RB set first resource block set
  • PSSCH includes resources on PSFCH AGC symbols when performing rate matching. That is, when PSSCH performs rate matching, it starts from symbol 1, ends at symbol 12, and skips symbol 10. That is, the GP symbol still maintains its functionality.
  • the resource pool includes at least one first resource block set (RB set).
  • RB set first resource block set
  • AGC symbols when the channel access process is performed on different first resource block sets, the AGC channels of each first resource block set are independent of each other. Therefore, using AGC symbols within the COT to transmit effective information will not be affected by AGC symbols outside the COT.
  • the data transmission directions of the first time slot and the time slot after the first time slot are consistent, that is, the first terminal device sends data in the first time slot and the time slot after the first time slot, or the first time slot If a terminal device receives data in the first time slot and the time slot after the first time slot, the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit the PSSCH include symbol 13 (case 2-2).
  • FIG. 7 shows a scenario where the resources corresponding to the GP symbol (symbol 10) and the AGC symbol (symbol 11) are used to transmit data, so that symbols 1 to 12 can be used by the first terminal device to transmit data. (Case 1-1). At this time, symbol 11 and symbol 12 still transmit different data, and symbol 11 can be used for rate matching. That is, the symbols used for rate matching by PSSCH include PSSCH symbols, GP symbols, AGC symbols, and PSFCH symbols. The AGC symbol is not a copy of the PSFCH symbol, but different data from the PSFCH symbol.
  • the data transmission directions of the first time slot and the time slot after the first time slot are consistent, that is, the first terminal device sends data in the first time slot and the time slot after the first time slot, or the first time slot If a terminal device receives data in the first time slot and the time slot after the first time slot, the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit the PSSCH include symbol 13 (case 1-2).
  • FIG. 7 shows a scenario in which the resources corresponding to the GP symbol (symbol 10) are used to transmit data (case 4-1), so symbols 1 to 10 and symbol 12 are all used by the first terminal device to transmit data. , symbol 11 and symbol 12 transmit the same data, symbol 11 is not used for rate matching. That is, the symbols used for rate matching by PSSCH include PSSCH symbols, GP symbols, and PSFCH symbols. AGC still maintains its functionality, that is, AGC symbols are copies of PSFCH symbols.
  • the data transmission directions of the first time slot and the time slot after the first time slot are consistent, that is, the first terminal device sends data in the first time slot and the time slot after the first time slot, or the first time slot If a terminal device receives data in the first time slot and the time slot after the first time slot, the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit PSSCH include symbol 13. (Case 4-2)
  • Figure 8 shows a scenario in which resources (symbol 12) included in PSFCH symbols are used for data transmission according to an embodiment of the present application after CPE is adopted.
  • the frequency domain resource of the second resource used to transmit data is the frequency domain resource corresponding to the PSSCH symbol (the frequency domain resource occupied by PSSCH transmission within the COT).
  • the time domain resource of the second resource is in addition to the PSSCH resource and the PSFCH symbol introduced earlier. Included resources may also include at least one of the following:
  • GAP time unit (the time interval between the PSSCH symbol and the CPE symbol), CPE time unit, AGC symbol (the symbol before the PSFCH symbol), GP symbol (GP symbol at the end of the slot), where the GAP time unit and the CPE time unit are The sum of the lengths is the length of one symbol in the first slot.
  • the time domain resource of the second resource may also include at least one of the following:
  • Case 1-1 PSSCH symbol, PSFCH symbol.
  • Case 1-2 PSSCH symbol, PSFCH symbol, GP symbol (GP symbol at the end of the slot).
  • Case 2-1 PSSCH symbols, PSFCH symbols, AGC symbols.
  • Case 2-1 PSSCH symbol, PSFCH symbol, AGC symbol, GP symbol (GP symbol at the end of the slot).
  • Case 3-1 PSSCH symbol, PSFCH symbol, CPE time unit.
  • Case 3-2 PSSCH symbol, PSFCH symbol, CPE time unit, GP symbol (GP symbol at the end of the slot).
  • Case 4-1 PSSCH symbol, PSFCH symbol, GAP time unit.
  • Case 4-2 PSSCH symbol, PSFCH symbol, GAP time unit, GP symbol (GP symbol at the end of the slot).
  • Case 5-1 PSSCH symbol, PSFCH symbol, CPE time unit, GAP time unit.
  • Case 5-2 PSSCH symbol, PSFCH symbol, CPE time unit, GAP time unit, GP symbol (GP symbol at the end of the slot).
  • Case 6-1 PSSCH symbol, PSFCH symbol, GAP time unit, AGC symbol.
  • Case 6-2 PSSCH symbol, PSFCH symbol, GAP time unit, AGC symbol, GP symbol (GP symbol at the end of the slot).
  • Case 7-1 PSSCH symbols, PSFCH symbols, CPE time units, AGC symbols.
  • Case 7-2 PSSCH symbol, PSFCH symbol, CPE time unit, AGC symbol, GP symbol (GP symbol at the end of the slot).
  • Case 8-1 PSSCH symbol, PSFCH symbol, GAP time unit, CPE time unit, AGC symbol.
  • Case 8-2 PSSCH symbol, PSFCH symbol, GAP time unit, CPE time unit, AGC symbol, GP symbol (GP symbol at the end of the slot).
  • the time domain resources used to transmit data do not include GAP time units, or do not include GAP time units and AGC symbols. This is to prevent the information on the two RB sets from affecting each other when the terminal device receives data in the resource pool. For example, receiving data in the first time slot of RB set1, receiving data in the first time slot of RB set2 and sending PSFCH, this Half-duplex problems may occur. If the transmission directions in the first time slot on the two RB sets are consistent, the time domain resources used to transmit data can include GAP time units.
  • the time domain resources used to transmit data can include the original GAP time unit or AGC symbols.
  • the data transmission symbols of PSSCH include PSSCH symbols and PSFCH symbols (case 1-1).
  • the PSSCH symbol is a symbol configured to transmit PSSCH
  • the PSFCH symbol is configured to transmit a PSFCH symbol but is actually used For transmitting PSSCH. That is, the rate matching symbols of PSSCH include PSSCH symbols and PSFCH symbols.
  • AGC symbols are not used to transmit valid data is that when the terminal equipment uses the same AGC symbol for frequency division multiplexing (or a resource pool includes at least two RB sets), performing AGC on AGC symbols outside the COT will affect the communication within the COT. Reception of information transmitted on a symbol.
  • the reason why the GAP time unit is not used to transmit valid data is that when the terminal device uses the same GAP time unit and frequency division multiplexing (or a resource pool includes at least two RB sets), the transceiver conversion will occur in the GAP time unit outside the COT. Affects the reception of information transmitted on GAP time units within the COT.
  • the AGC symbol is a copy of the PSFCH symbol.
  • the CPE time unit (the tail of symbol 10, or understood as part of the time domain resource at the tail of symbol 10) copies part of the AGC symbol (part of the time domain resource at the head of the AGC symbol), and the GAP time The unit does not transmit any signal.
  • the symbols actually used to transmit data include: symbol 1-symbol 9 and symbol 12.
  • the data transmission directions of the first time slot and the time slot after the first time slot are consistent, that is, the first terminal device sends data in the first time slot and the time slot after the first time slot, or the first time slot
  • the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot, that is, the GP symbol actually used to transmit the PSSCH
  • the symbols include symbol 13 (case 1-2).
  • the data transmission symbols of the PSSCH include the PSSCH symbol, the AGC symbol of the PSFCH symbol (the symbol before the PSFCH symbol), and the PSFCH symbol.
  • the PSSCH symbol is a symbol configured to transmit the PSSCH
  • the PSFCH symbol is a symbol configured to transmit the PSFCH but is actually used to transmit the PSSCH.
  • the AGC symbols of the PSFCH symbols are not duplicates of the PSFCH symbols, but symbols used for rate matching. That is, the rate-matching symbols of the PSSCH include the PSSCH symbol, the AGC symbol of the PSFCH symbol (the previous symbol of the PSFCH symbol) and the PSFCH symbol.
  • GAP time unit symbols are not used to transmit valid information
  • the terminal device uses the same GAP time unit, frequency division multiplexing (or a resource pool includes at least two RB sets), the terminal device transmits and receives on the GAP time unit outside the COT.
  • the conversion affects the reception of information transmitted on the same symbol within the COT.
  • the reason for using AGC symbols to transmit valid data is that the AGC channels on different RB sets are independent and will not affect each other.
  • the PSFCH symbol and the AGC symbol are used to transmit data (case 2-1).
  • the CPE time unit copies the data transmitted in part of the AGC symbols.
  • the symbols actually used to transmit data include: symbol 1-symbol 9, symbol 11 and symbol 12.
  • the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit the PSSCH include symbol 13 (case 2-2).
  • the data transmission symbols of PSSCH include PSSCH symbols, PSFCH symbols, and CPE time units.
  • the PSSCH symbol is a symbol configured to transmit PSSCH.
  • the PSFCH symbol is configured to transmit a symbol of PSFCH but is actually used to transmit a symbol of PSSCH.
  • the CPE time unit carries valid bit information, that is, the rate matching symbols of PSSCH include PSSCH symbols. , CPE time unit, PSFCH symbol.
  • the reason for not using AGC symbols to transmit valid data is that when the terminal equipment uses the same AGC symbol for frequency division multiplexing (or a resource pool includes at least two RB sets), performing AGC on AGC symbols outside the COT will affect the COT. Reception of information transmitted on the same symbol.
  • the reason why the GAP time unit is not used to transmit valid information is that when the terminal device uses the same GAP time unit and frequency division multiplexing (or a resource pool includes at least two RB sets), the transceiver conversion will occur in the GAP time unit outside the COT. Affects the reception of information transmitted on GAP time units within the COT.
  • PSFCH symbols and CPE time units are used to transmit data (Case 3-1).
  • the AGC symbol is a copy of the PSFCH symbol.
  • the symbols actually used to transmit data (rate matching) include: symbol 1-symbol 9, CPE time unit and symbol 12.
  • the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit the PSSCH include symbol 13 (case 3-2).
  • the data transmission symbols of PSSCH include PSSCH symbols, PSFCH symbols, and GAP time units.
  • the PSSCH symbol is a symbol configured to transmit PSSCH
  • the PSFCH symbol is a symbol configured to transmit PSFCH but is actually used to transmit PSSCH.
  • the GAP time unit carries valid bit information, that is, the rate-matching symbols of PSSCH include PSSCH symbols.
  • AGC symbols are not used to transmit valid data is that when the terminal equipment uses the same AGC symbol for frequency division multiplexing (or a resource pool includes at least two RB sets), performing AGC on AGC symbols outside the COT will affect the same transmission within the COT. Reception of information transmitted on a symbol.
  • PSFCH symbols and GAP time units are used to transmit data (Case 4-1).
  • the AGC symbols are copies of the PSFCH symbols, and the CPE time unit copies some AGC symbols.
  • the symbols actually used to transmit data (rate matching) include: symbols 1-Symbol 9, GAP time unit and symbol 12.
  • the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit PSSCH include symbol 13. (Case 4-2)
  • the data transmission symbols of PSSCH include PSSCH symbols, PSFCH symbols, CPE time units and GAP time units.
  • the PSSCH symbol is a symbol configured to transmit PSSCH
  • the PSFCH symbol is a symbol configured to transmit PSFCH but is actually used to transmit PSSCH.
  • the CPE time unit and GAP time unit carry valid bit information, that is, the rate matching symbols of PSSCH include PSSCH symbol, CPE time unit, GAP time unit, PSFCH symbol.
  • the reason for not using AGC symbols to transmit valid data is that when the terminal equipment uses the same AGC symbol for frequency division multiplexing (or a resource pool includes at least two RB sets), performing AGC on AGC symbols outside the COT will affect the COT. Reception of information transmitted on the same symbol.
  • PSFCH symbols, GAP time units, and CPE time units are used to transmit data.
  • the symbols actually used to transmit data include: symbol 1-symbol 10 and symbol 12, where symbol 10 includes the GAP time unit and the CPE time unit (case 5-1).
  • the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit the PSSCH include symbol 13 (case 5-2).
  • the data transmission symbols of PSSCH include PSSCH symbols, PSFCH symbols, GAP time units and AGC symbols of PSFCH symbols (the previous symbol of PSFCH symbols).
  • the PSSCH symbol is a symbol configured to transmit PSSCH
  • the PSFCH symbol is a symbol configured to transmit PSFCH but is actually used to transmit PSSCH.
  • the AGC symbol of the PSFCH symbol is not a copy of the PSFCH symbol
  • the GAP time unit carries valid bit information.
  • the rate-matching symbols of the PSSCH include the PSSCH symbol, the GAP time unit, the PSFCH symbol and the AGC symbol of the PSFCH symbol (the previous symbol of the PSFCH symbol).
  • the PSFCH symbol, the GAP time unit, and the AGC symbol of the PSFCH symbol are used to transmit data.
  • the CPE time unit copies some AGC symbols.
  • the symbols actually used to transmit data include: symbol 1-symbol 9, GAP time unit, symbol 11 and symbol 12 (case 6-1).
  • the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit the PSSCH include symbol 13 (Case 6-2).
  • the data transmission symbols of PSSCH include PSSCH symbols, PSFCH symbols, CPE time units and AGC symbols of PSFCH symbols (the previous symbol of PSFCH symbols).
  • the PSSCH symbol is a symbol configured to transmit PSSCH
  • the PSFCH symbol is a symbol configured to transmit PSFCH but is actually used to transmit PSSCH.
  • the AGC symbol of the PSFCH symbol is not a copy of the PSFCH symbol
  • the CPE time unit carries valid bit information.
  • the rate-matching symbols of the PSSCH include the PSSCH symbol, the CPE time unit, the PSFCH symbol and the AGC symbol of the PSFCH symbol (the previous symbol of the PSFCH symbol).
  • PSFCH symbols, CPE time units and AGC symbols are used to transmit data.
  • the symbols actually used to transmit data include: symbol 1-symbol 9, CPE time unit, symbol 11 and symbol 12 (case 7-1).
  • the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit the PSSCH include symbol 13 (Case 7-2).
  • the data transmission symbols of PSSCH include PSSCH symbols, PSFCH symbols, GAP time units, CPE time units and AGC symbols of PSFCH symbols (the previous symbol of PSFCH symbols).
  • PSSCH symbol is a symbol configured to transmit PSSCH
  • PSFCH symbol is a symbol configured to transmit PSFCH but is actually used to transmit PSSCH.
  • the AGC symbol of the PSFCH symbol is not a copy of the PSFCH symbol, in the GAP time unit and CPE time unit.
  • the symbols that carry valid bit information, that is, the rate matching symbols of the PSSCH include the PSSCH symbol, the GAP time unit, the CPE time unit, the PSFCH symbol and the AGC symbol of the PSFCH symbol (the previous symbol of the PSFCH symbol).
  • PSFCH symbols, GAP time units, CPE time units and AGC symbols are used to transmit data.
  • the symbols actually used to transmit data include: symbol 1-symbol 12, of which symbol 10 includes GAP Time unit and CPE time unit (Case 8-1).
  • the GP symbol at the end of the first time slot can be used to transmit the PSSCH in the first time slot. That is, the symbols actually used to transmit the PSSCH include symbol 13 (Case 8-2).
  • the resource pool includes two or more first resource block sets, and the first terminal device only obtains the channel access time on the first resource block set 1 through LBT (channel access process) (that is, successfully accesses The first set of resource blocks 1). Then assume that the first terminal device sends data to the second terminal device in the first time slot, and if the third terminal device uses the first resource block set 2 in the resource pool, it also sends data to the second terminal device in the first time slot.
  • LBT channel access process
  • the first terminal device uses AGC symbols or GAP time units (it can also be called GP symbols when there is no CPE time unit) to send data
  • the third terminal device does not use AGC symbols or GAP time units for data transmission.
  • the AGC symbols and GAP time units on the second RB set may affect the reception of data by the second terminal device on the corresponding symbols of the first RB set.
  • the first terminal device before the first terminal device transmits the target information on the first resource, the first terminal device sends first indication information to the second terminal device, and the first indication information is used to instruct the second terminal device to transmit the target information on the first resource.
  • the device sends second feedback information.
  • the first terminal device sends the second indication information and identification information to the second terminal device.
  • the identification information includes at least one of source identification information, destination identification information, and transmission type. The identification information is used by the second terminal device to determine that it sends the second feedback information on the first resource.
  • the first terminal device sends fourth instruction information to the second terminal device, and the fourth instruction information is used to instruct the first terminal device to send the first terminal device on the first resource.
  • feedback information so that the second terminal device can receive corresponding feedback information on the first resource.
  • the first terminal device sends fifth indication information, where the fifth indication information is used to indicate that the first resource is used to transmit the first feedback information or the second feedback information.
  • the first feedback information is feedback information sent by the first terminal device
  • the second feedback information is feedback information received by the first terminal device.
  • the first terminal device may send indication information to the second terminal device to instruct the second terminal
  • the first resource of the device is available, so that the second terminal device can send second data on the second resource or send second feedback information on the first resource according to the instruction information of the first terminal device.
  • the second terminal device can be a shared first terminal.
  • the device's COT uses the first time slot of the terminal device.
  • the first indication information can also be understood as information used to instruct the first terminal device to share time-frequency resources with the second terminal device, that is, the first terminal device uses the first indication information to indicate the time-frequency resources, and the time-frequency resources are used for the second terminal device. Transmission from terminal equipment.
  • the first terminal device indicating the time-frequency resource means instructing the second terminal device to use the time-frequency resource to transmit data. That is, the first instruction information is used to instruct the second terminal device to send the second data to the first terminal device on the second resource.
  • the first indication information may be COT indication information.
  • the first indication information can be carried in the first-level SCI, the second-level SCI, MAC CE, and PC5 RRC.
  • the second indication information may be a field indicating time-frequency resources for transmitting feedback information.
  • the second indication information may be 1 bit, which indicates the first terminal device to send the first feedback information to the second terminal device, or the first terminal device to send the first feedback information.
  • the second indication information is a field indicating a time-frequency resource for transmitting feedback information and 1 bit, wherein the 1 bit indicates that the first terminal device sends the first feedback information to the second terminal device, or the first terminal device sends the first feedback information.
  • the second indication information may be COT indication information.
  • the second indication information can be carried in the first-level SCI, the second-level SCI, MAC CE, and PC5 RRC.
  • the first terminal device determines that the first resource is available based on the second information, and the second information includes at least one of the following: the third data The transmission type, the HARQ feedback type of the third data, the energy measurement value associated with the third data and whether the first terminal device is the target terminal device of the third data, where the third data is data transmitted on the second time slot, and the second time slot
  • the slot is at least one time slot determined based on the feedback timing and the first time slot.
  • the third data here refers generally to the data transmitted on the second time slot and is not limited to a specific data.
  • the first terminal device Before the first terminal device uses the first resource, the first terminal device needs to determine that the first resource is available, so that the first resource can be used to transmit data or feedback information as described above.
  • the first terminal device determines that the first resource is available based on the second information, including: when the second information satisfies a preset condition, the first terminal device determines that the first resource is available, and the preset condition includes at least one of the following: The transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to the preset threshold; the first terminal device is not the third data target terminal device.
  • the first terminal device may determine that the first resource is available according to a second preset condition, and the second preset condition includes at least one of the following: the transmission type of the third data is unicast or multicast and HARQ feedback is enabled; Three data associated energy measurements are greater than or equal to the preset Set a threshold; the first terminal device is the target terminal device of the third data.
  • the second time slot is at least one time slot determined based on the feedback timing and the first time slot. It can be understood that the terminal equipment receives at least K (feedback timing) times after receiving the last time slot (first time slot) of the PSSCH.
  • the PSFCH is sent in the first slot including the PSFCH resource.
  • the second time slot is the first time slot including PSFCH resources in the interval feedback timing after the first time slot. That is, the first time slot is time slot n, the second time slot is n+K, and the time slots after n+K include the first time slot of the PSFCH resource, where K is the feedback timing and K is a positive integer.
  • K 2 or 3.
  • Optional K 1.
  • a smaller value of K can be used to reduce latency.
  • the first time slot corresponds to more than one second time slot, and the more than one second time slot may be called a second time slot set.
  • the first terminal device determines whether the PSFCH resource corresponding to the PSCCH is used according to the detection result of the PSCCH (the detection result of the SCI, which can also be understood as the detection result of the SCI information) in the second time slot set associated with the first time slot.
  • the PSFCH resource corresponding to the PSCCH is the PSFCH resource associated with the resource of the PSSCH scheduled by the PSCCH.
  • the time-frequency position of the PSFCH resource can be determined according to the time-frequency position of the PSSCH resource.
  • the set of frequency domain positions and/or code domain positions of the PSFCH resources is determined according to the frequency domain starting subchannel of the PSSCH resource or the frequency domain subchannel occupied by the PSSCH resource.
  • the frequency domain resources and/or code domain resources in the set of frequency domain locations and/or code domain locations of the PSFCH resources are determined according to the source target identifier and/or group identifier indicated in the PSCCH.
  • the first terminal device determines that the PSFCH resources in the first time slot are not used, or the PSFCH resources in the first time slot are partially used.
  • the first terminal device determines that the PSFCH resources in the COT in the first time slot are not used, or the PSFCH resources in the COT in the first time slot are partially used.
  • the specific method of determining that the first resource is available may include the following steps:
  • the first terminal device determines an available resource set and selects the first resource from the available resource set.
  • An example may include at least one of the following steps:
  • Step 1 Determine the complete set of PSFCH resources included in the PSFCH symbols
  • the PSFCH symbol includes one or more frequency domain resource units.
  • the frequency domain resource unit can be a sub-channel, an interleave, or a PRB. Take interleaving as an example.
  • the PSFCH symbol includes S1 frequency domain and code domain resources, and S1 is a positive integer.
  • Step 2 Determine the set of PSFCH resources used in PSFCH symbols according to the following preset conditions.
  • the first time slot where the PSFCH symbol is located or the PSFCH symbol is associated with the second time slot and the second time slot is a time slot determined based on the first time slot and the feedback timing between the PSSCH and the PSFCH.
  • the first terminal device may determine the PSFCH resources used in the PSFCH symbols according to the second information in the second time slot set.
  • the used PSFCH resources are resources for transmitting HARQ of type 1. That is, the PSFCH resource is determined based on the time-frequency location of the PSSCH resource.
  • the process of determining that the PSFCH is used according to the second information is as follows:
  • the first terminal device may determine that the PSFCH resource is available according to a second preset condition.
  • the second preset condition includes at least one of the following: the transmission type of the third data is unicast or multicast and HARQ feedback is enabled; the third data associated The energy measurement value is greater than or equal to the preset threshold; the first terminal device is the target terminal device of the third data.
  • the third data is SCI-scheduled data detected by the first terminal device in the second time slot set, or SCI-scheduled data sent by the first terminal device in the second time slot set.
  • the transmission type of the third data may be indicated in the second-level SCI that schedules the third data.
  • HARQ feedback enablement may be indicated in the second level SCI that schedules the third data.
  • Step 3 Exclude the used PSFCH resources from the complete set obtained in step 1, and the remaining resources are the available resource set.
  • the set of used PSFCH resources determined according to step 2 is marked as S2. Exclude the PSFCH resources included in S2 from the PSFCH resources included in set S1, and the remaining PSFCH resources are the set of available PSFCH resources, which is S3.
  • Step 4 Select the first resource from the available resource set.
  • the first terminal device selects the first resource in S3 determined in step 3.
  • the first resource can be some or all of the resources in S3.
  • the time slots associated with the first time slot through feedback timing may include time slots within the COT and time slots outside the COT. Since the starting position of the COT depends on the time point when the channel access process is successful, the second time slot associated with the first time slot may be located in the COT or outside the COT. In some embodiments, the second time slot used to determine that the first resource is available only includes time slots within the COT. It can be understood that only data transmission within the COT can be fed back in the first time slot. This also means that the second time slots included in the second time slot set are all located within the COT, that is, the subchannels in the second time slot set are associated with the PSFCH resources in the PSFCH symbols. The time slots outside the COT determined based on the first time slot and feedback timing are no longer associated with PSFCH resources in the PSFCH symbols.
  • Figure 9 shows the scenario in which the first terminal device obtains the COT.
  • the COT of the first terminal device includes time slot n+1, time slot n+2, time slot n+3 and time slot n+4.
  • Time slot n+3 is the first time slot, and this time slot includes the feedback resource b corresponding to the PSFCH symbol.
  • the time slots determined through feedback timing include slot n and time slot n+1. . If the first terminal device does not send or receive data on time slot n, then the first terminal device will not use feedback resource b to send or receive feedback, and the first terminal device may not share the feedback resources in the COT with other terminal devices (i.e.
  • the time slot associated with the first time slot according to the feedback timing is not within the COT, then the HARQ of this time slot cannot be fed back in the first time slot).
  • the time slots located within the COT among the time slots associated with the first time slot need to be considered, that is, the feedback situation of the data transmitted in slot n+1.
  • the first terminal device sends data in time slot n+1, then the time when the first terminal device LBT (channel access) succeeds is not later than the starting time of time slot n+1, the first terminal device When the device accesses the channel, it can know what kind of data (third data) will be sent using time slot n+1, so that it can determine whether the resource in feedback resource b corresponding to the third data in time slot n+1 is used.
  • the second information can be the specific information for the third data transmission or can also be considered as the SCI information to be sent by the first terminal device (that is, the second information can be from the information to be sent or the information that has been sent. ).
  • the data sent by the first terminal device in time slot n+1 is sent by broadcast. Since the broadcast data does not require feedback, the first terminal device can determine that the feedback resource corresponding to time slot n+1 is available.
  • the first terminal device may determine that the feedback resource corresponding to time slot n+1 is available.
  • the first terminal device is not the terminal device that sends data in time slot n+1, then the first terminal device can detect the SCI information of time slot n+1 and determine the time slot n+1 based on the SCI information. Whether the corresponding feedback resource is used.
  • the SCI information is the second information mentioned above.
  • the first terminal device detects SCI information in time slot n+1, indicating that the data transmitted on time slot n+1 is sent in a broadcast manner.
  • the broadcast type field (or transmission type field) in the SCI information indicates that the data transmitted in time slot n+1 is sent in a broadcast manner. If the data uses broadcast (cast type indicator indicates broadcast), then the first terminal device can determine that the data transmitted in time slot n+1 does not require feedback, then the first terminal device can determine the data scheduled by the SCI information detected in time slot n+1. Corresponding feedback resources are available.
  • the first terminal device detects SCI information in time slot n+1, and the SCI information indicates that HARQ feedback is disabled for the data sent in this time slot.
  • the HARQ feedback enable/disable field indicates that HARQ feedback is disabled, then the first terminal device can determine that the data transmitted in time slot n+1 does not require feedback, and the feedback resources corresponding to the data scheduled by the SCI information detected in time slot n+1 are available.
  • the transmission type of the data in time slot n+1 obtained by the first terminal device according to the cast type indicator field (cast type indicator) in the SCI is unicast or multicast.
  • the first terminal device detects SCI information in time slot n+1, but the energy measurement value associated with the SCI information is less than or equal to the preset threshold, then the first terminal device can determine the SCI detected in time slot n+1.
  • Feedback resources corresponding to information scheduling data are available.
  • the energy measurement value can be received signal strength indicator (RSSI), reference signal received power (RSRP), signal to interference plus noise ratio (SINR), signal to interference plus noise ratio (SINR), Noise ratio (signal to noise ratio, SNR), etc.
  • RSSI is defined as the linear average of the total received power (in [W]) observed in the subchannels configured in the OFDM symbols of the slots configured for PSCCH and PSSCH starting from the 2nd OFDM.
  • the RSRP measurement value may be measured based on the DMRS of the PSSCH scheduled by the SCI, or based on the DMRS measurement of the PSCCH where the SCI is located.
  • PSCCH Reference Signal Received Power is defined as the linear average of the power contribution (in [W]) of the resource elements carrying the demodulation reference signal associated with the Physical Sidelink Control Channel (PSCCH).
  • PSSCH-RSRP PSSCH Reference Signal Received Power
  • Preset thresholds can be configured by the network device or preconfigured. Specifically, the threshold may be jointly determined based on the priority value included in the detected SCI information and the priority value N.
  • the SCI priority value detected in the SCI may be included in the first-level SCI (SCI- 1) priority.
  • the priority value N may be preset, predefined or configured by the network device or preconfigured.
  • the value feedback of N is a positive integer from 1 to 8. Optional, N equals 1. At this time, the threshold can be made larger to ensure that feedback resources can be utilized for transmitting data or feedback information.
  • the threshold may also be determined based on the priority value included in the detected SCI information and the priority value of the data to be sent by the first terminal device.
  • the threshold may also be based on the priority value included in the detected SCI information and the initial value of the first terminal device. Determined by the priority value used by the original COT.
  • the priority values 1, 2, 3, and 4 can respectively correspond to the data priority values ⁇ 1, 2 ⁇ , ⁇ 3 ,4 ⁇ , ⁇ 5,6 ⁇ , ⁇ 7,8 ⁇ .
  • the first terminal device measures energy in time slot n+1.
  • the measured energy can be RSSI, SINR or SNR, etc.
  • the measured value of RSSI can be measured based on all symbols included in time slot n+1 (the time domain range is a time slot, the frequency domain range is the frequency domain range of the resource pool), or based on the COT in time slot n+1 All time-frequency resources included in the measurement are measured (the time domain range is a time slot; the frequency domain range is the frequency domain range corresponding to the COT).
  • the measured value of RSSI can be based on the symbols configured for transmitting PSSCH and PSCCH in time slot n+1 in the resource pool (the frequency domain range is the resource pool), or based on the symbols configured in time slot n+1 in the COT. Configure the symbols used to transmit PSSCH and PSCCH (the frequency domain range is the frequency domain range corresponding to the COT).
  • the first terminal device can also decode the SCI information.
  • the first terminal device determines that the feedback resource corresponding to the SCI-scheduled data in time slot n+1 is available.
  • Energy measurement values can be RSSI, RSSP, SNR, SINR, etc. That is, the target terminal device of the information sent by the terminal device sharing the COT of the first terminal device needs to be the first terminal device.
  • the measured value of the SCI associated energy is low, it can be considered that the interference caused by the SCI to the first terminal device is very low and will not affect the transmission performance of the first terminal device.
  • the first terminal device may also determine that the feedback resource corresponding to time slot n+1 is available.
  • the first terminal device transmits information on the second time slot
  • the second time slot used for determining that the first resource is available includes time slots within the COT and outside the COT. That is, the time slots that satisfy the first time slot and feedback timing are all second time slots, and the time slots included in the set of second time slots may be located within the COT or outside the COT. Still taking Figure 9 as an example, the feedback timing between PSSCH and PSFCH is 2 time slots. If the first terminal device sends data in time slot n, the target terminal device of the first terminal device that receives data in time slot n needs to send feedback information in the feedback resource of time slot n+3, and the target terminal device uses the first Feedback resources within the COT of the terminal device are allowed.
  • the PSFCH corresponding to the data in the second time slot outside the COT can be fed back within the COT. Even if the target terminal device of the data transmission is not the second terminal device. That is, the second information in the second time slot outside the COT can determine whether the corresponding PSFCH resource is an available resource or an unavailable resource according to the preset conditions.
  • the target terminal device for data transmission in the second time slot outside the COT is not the first terminal device (that is, the target terminal device has no sending and receiving relationship with the first terminal device), then the PSFCH corresponding to the data cannot be within the COT. transmission.
  • the PSFCH resources corresponding to this data are available resources.
  • the first terminal device needs to feed back the corresponding HARQ information on the PSFCH resource of the first time slot.
  • the first terminal device If the first terminal device receives data on time slot n, the first terminal device needs to feedback the PSFCH corresponding to the data on time slot n on the feedback resource b of time slot n+3, and the first terminal device still needs to consider the time slot
  • the data transmission status of n determines whether the first resource is available. That is, when the first terminal device determines whether the first resource is available, it needs to simultaneously consider time slots within the COT and outside the COT among the time slots associated with the first time slot.
  • the first terminal device needs to judge the data transmission situation on time slot n and time slot n+1 respectively, and determine whether the feedback resource corresponding to time slot n is available based on the data transmission situation of time slot n. It is similar to the previously described method of determining whether the feedback resource corresponding to time slot n+1 is available based on the data transmission situation of time slot n+1.
  • the specific process please refer to the relevant description and will not be repeated here.
  • This application only schematically introduces the process of determining whether the first resource is available by taking the time slot associated with the first time slot with only two time slots as an example. In actual situations, the first terminal device needs to combine all associated time slots that need to be considered.
  • the second information in the slot (SCI information or data transmission status) is determined according to the previous description whether the corresponding feedback resource is available, thereby obtaining the available resource set in the feedback resource of the first time slot, and then obtaining it from the available resource set
  • the first resource is used to transmit data or transmit feedback.
  • the first terminal device may send COT indication information to indicate whether the preconfigured PSFCH time slots (time slots including PSFCH resources, that is, time slots including PSFCH symbols) in the COT include PSFCH resources. That is, it indicates whether the preconfigured PSFCH time slot in the COT is a real PSFCH time slot.
  • the first terminal device can learn whether the PSFCH resources in the COT will be used after determining whether the PSFCH resources in the COT are used according to the preset conditions.
  • the first terminal device determines whether the (pre)configured PSFCH symbols in the COT are used to transmit feedback information or data. Therefore, the first terminal device can indicate in the COT indication information the PSFCH time slot in the COT that is actually used to transmit feedback information.
  • the PSFCH time slot that is actually used to transmit feedback information may include PSFCH resources implicitly indicated by the feedback timing. (time slot) and/or display indicates the resource (time slot) used to transmit the PSFCH.
  • the COT of the first terminal device includes X preconfigured PSFCH time slots.
  • the first terminal equipment sends indication information, the indication information is X bits, and the X bits are used to indicate whether the X preconfigured PSFCH time slots in the COT are real PSFCH time slots. For example, if This means that among the 4 preconfigured time slots in the COT, there are no PSFCH resources in the 1st/2nd/4th preconfigured time slots, and there are PSFCH resources in the 3rd preconfigured time slot.
  • the indication meanings of 1 and 0 can also be reversed. 0 indicates that the preconfigured PSFCH time slot is a real PSFCH time slot, and 1 indicates that the preconfigured PSFCH time slot is a real PSFCH time slot. The principles of the embodiments of this application are not affected.
  • the first terminal device may send indication information and data, where the indication information is used to indicate that the second resource occupied by the data includes the first resource or does not include the first resource.
  • the frequency domain corresponding to the initial COT of the first terminal equipment is two RB sets, and the first terminal equipment determines that none of the resources in the PSFCH symbols in the first time slot are used. Then the resources in the PSFCH symbols on both RB sets are available resources. The resources in both RB sets are used to transmit data or feedback information. Otherwise, the PSFCH resource in one of the RB sets is not used and may cause COT interruption. Assuming that the first terminal device has no information to be transmitted, the PSFCH symbol may be a copy of the first symbol of the GAP time unit. In other words, assuming that the first terminal device has no information to be transmitted, the PSFCH symbol is a copy of the last symbol among the PSSCH symbols.
  • the PSFCH AGC symbol is a copy of the PSFCH symbol, which is essentially a copy of the last symbol in the PSSCH symbol.
  • the CPE time unit is a partial copy of the PSFCH AGC symbol, which is essentially a partial copy of the last symbol in the PSSCH symbol.
  • the process of determining whether the first resource is available can be extended to a scenario of multiple transmission opportunities.
  • one PSSCH corresponds to one PSFCH transmission opportunity (feedback resource corresponding to one PSFCH symbol).
  • PSFCH transmission in unlicensed spectrum requires LBT, if LBT fails, PSFCH cannot be transmitted. Configuring multiple PSFCH transmission opportunities can improve PSFCH Transmission reliability.
  • multiple transmission opportunities can be enabled or disabled, and the granularity of being enabled or disabled can be a resource pool or RB set.
  • the first terminal device may be configured or pre-configured by the network device to enable or disable the function of multiple transmission opportunities in the resource pool or RB set.
  • the plurality of transmission opportunities may be fixed, or may be configured or pre-configured or pre-defined for the network device.
  • the multiple transmission opportunities may be two transmission opportunities or three transmission opportunities, that is, one PSSCH transmission corresponds to the feedback resources or transmission opportunities of 2 or 3 time slots.
  • the number of transfer opportunities or feedback resources can be indicated by a field. This field can be carried in the first-level SCI or the second-level SCI or MAC CE or PC5 RRC.
  • the feedback resources on the PSFCH transmission opportunity to be used can be considered available.
  • the first terminal device determines that the PSFCH resource in a certain transmission opportunity includes ACK or NACK, then the PSFCH resource corresponding to the PSFCH resource in the transmission opportunity is to be used. for available resources.
  • the PSFCH resource in a transmission opportunity it can be determined whether the PSFCH resource in the transmission opportunity is available based on whether HARQ information is transmitted in the PSFCH resource corresponding to the PSFCH resource in the transmission opportunity before the transmission opportunity. Available.
  • the first terminal device can blindly check whether feedback information exists in the PSFCH resource in the previous transmission opportunity associated with the PSFCH resource. If it is detected that there is HARQ information (NACK or ACK) in the previous feedback opportunity, the PSFCH resources in this transmission opportunity are available resources. If it is detected that the HARQ information in the previous feedback opportunity is discontinuous transmission (DTX) (it can also be understood as no ACK or NACK is detected), then the PSFCH resource in this transmission opportunity is an unavailable resource.
  • DTX discontinuous transmission
  • the second time slot is associated with multiple PSFCH transmission opportunities according to feedback timing.
  • the number of PSFCH transmission opportunities is 2.
  • the second time slot is associated with the first PSFCH transmission opportunity according to the feedback timing, and the second PSFCH transmission opportunity may be the first time slot including PSFCH resources after the second time slot.
  • the second time slot is associated with the first PSFCH transmission opportunity according to feedback timing, and the second PSFCH transmission opportunity may be the next time slot of the second time slot.
  • the first terminal device receives the third data in the second time slot, and the first terminal device sends feedback information corresponding to the third data in the third time slot.
  • the plurality of time slots including transmission opportunities corresponding to the second time slot include the first time slot and the third time slot.
  • the third time slot is a time slot preceding the first time slot that includes a transmission opportunity.
  • the first terminal device determines that the feedback information corresponding to the third data in the third time slot is ACK or NACK, and then determines that the corresponding feedback information in the first time slot is ACK or NACK.
  • the corresponding PSFCH resources are available resources.
  • the first terminal equipment determines that the feedback information corresponding to the third data in the third time slot is DTX, and then determines that the corresponding PSFCH resource in the first time slot is an unavailable resource.
  • the first terminal equipment determines the available PSFCH resources in the first time slot based on the usage of PSFCH resources in multiple transmission opportunities before the first time slot.
  • the usage includes HARQ being ACK or NACK, or DTX, Select the first resource from the available PSFCH resource set.
  • Figure 10 shows a scenario of multiple transmission opportunities.
  • the COT obtained by the first terminal device LBT (executing the channel access process) includes time slot n+1, time slot n+2, time slot n+3, and time slot n+ 4 and time slot n+5.
  • the first transmission opportunity of time slot n and time slot n+1 is in time slot n+3, and the second transmission opportunity of time slot n and time slot n+1 is in time slot n+5. If the feedback resource in the first transmission opportunity of time slot n+1 is at position a of time slot n+3, then the feedback resource in the second transmission opportunity is at position a' of time slot n+5.
  • the first time slot is time slot n+5, the second time slot determined based on the first time slot and the feedback timing is time slot n+1, and the third time slot determined based on the second time slot and the second feedback timing is time slot n+5. Gap n+3. If the first terminal device determines that there is HARQ feedback for the data of time slot n+1 (second time slot) on the third time slot, then the third time slot (time slot n+3) and the second time slot (time slot) The resources corresponding to the data transmission in slot n+1) are used, and the resources corresponding to the data transmission in the second time slot (time slot n+1) in the first time slot (time slot n+5) are available.
  • the first terminal device determines that there is DTX feedback for the data of time slot n+1 (second time slot) on the third time slot, the first time slot (time slot n+5) and the second time slot (time slot The resources corresponding to data transmission of n+1) are unavailable.
  • Figure 11 shows another sidelink communication method 1100 provided by an embodiment of the present application.
  • the method includes:
  • the second terminal device receives COT indication information from the first terminal device.
  • the time unit indicated by the COT indication information includes the first time slot, and the first time slot includes PSFCH symbols.
  • the COT indication information is sent by the first terminal device.
  • the first terminal device can obtain the COT from the resource pool through Type 1 LBT, and then send the COT indication information.
  • the indication information includes the time domain range included by the COT. and frequency domain range, and whether each time slot is shared with other terminal equipment.
  • the second terminal device uses the first time slot to transmit information.
  • the second terminal device can receive information from the first terminal device in the first time slot or the second terminal device can share the COT of the first terminal device and send it to the first terminal device. information.
  • the second terminal device transmits target information on the first resource.
  • the first resource is a resource in the PSFCH symbol.
  • the target information includes one of the first data, the second data, the first feedback information and the second feedback information.
  • the first data is the data to be received by the second terminal device in the first time slot
  • the second data is the data to be sent by the second terminal device in the first time slot
  • the first feedback information is the data to be received by the second terminal device.
  • Feedback information, the second feedback information is feedback information to be sent by the second terminal device.
  • the second terminal device transmits the target information on the first resource, including: when the target information includes the first data, the second terminal device receives the first data on the second resource, and the second resource including the first resource; in the case where the target information includes the second data, the second terminal device sends the second data on the second resource, and the second resource includes the first resource; in the case where the target information includes the first feedback information, The second terminal device receives the first feedback information on the first resource; when the target information includes the second feedback information, the second terminal device sends the first feedback information on the first resource.
  • the first terminal device when the target information includes the first data, the first terminal device sends the first data on the second resource, and the second resource includes the first resource; when the target information includes the second data, the first terminal device Receive the second data on the second resource, and the second resource includes the first resource; when the target information includes the first feedback information, the first terminal device sends the first feedback information on the first resource; when the target information includes the first feedback information In the case of two feedback information, the first terminal device receives the second feedback information on the first resource.
  • the second resources also include resources corresponding to the PSSCH symbols on the first timeslot.
  • the target information may include first feedback information or second feedback information.
  • the target information may include first data, second data, first feedback information, second One of the feedback messages.
  • the method 600 has been introduced in detail in the embodiment shown in Figure 6. For specific details, please refer to the relevant description of the corresponding embodiment in Figure 6. For the sake of brevity, here No further details will be given.
  • the second terminal device transmits the target information on the first resource according to at least one item of the first information.
  • the first information includes: the priority of the first data; the priority of the second data; The priority of the first feedback information; the priority of the second feedback information class.
  • the priority can be carried in SCI-1 in the PSCCH.
  • Whether the above four priorities exist is related to the specific data that the second terminal device needs to transmit.
  • the first data and the second data are related to whether the second terminal device needs to receive the first data or send the second data in the first time slot, and Whether the first feedback information and the second feedback information exist also depends on whether the second terminal device has unreceived first feedback information and unsuccessfully sent second feedback information.
  • the specific information that the second terminal device needs to transmit includes which of the above information, the second terminal device can compare their priorities and determine the final target information to be transmitted.
  • the second terminal device can also determine the priority of data (first data and second data) and feedback information (first feedback information and second feedback information), and determine whether the first resource is used to transmit data or transmit data. After the feedback information is fed back, what kind of feedback information is transmitted is determined based on the priority within the feedback information.
  • first data and second data data and second data
  • feedback information first feedback information and second feedback information
  • the second terminal device transmits target information on the first resource according to at least one item of the first information.
  • the first information includes: delay information of the first data; delay information of the second data. ; The delay information of the first feedback information; the delay information of the second feedback information.
  • the second terminal device may only use the priority to determine what kind of target information to transmit, or it may only use the delay information to determine what kind of target information to transmit, or it may also use a combination of priority and delay information to determine what kind of target information to transmit.
  • priority to determine what kind of target information to transmit
  • delay information to determine what kind of target information to transmit
  • combination of priority and delay information to determine what kind of target information to transmit.
  • the resources used by the second terminal device to receive the first data include those in the first time slot. resources corresponding to the GAP time unit; or, when the first resource is used to send the second feedback information and the second terminal device sends data in the first time slot, the second terminal device is used to send the second data including the first time slot.
  • the resource corresponding to the GAP time unit in .
  • the GAP time unit is the time unit corresponding to the GP symbol in NCP, and is a shorter time unit than the GP symbol in ECP.
  • the first time slot is used for the second terminal device to send information. Since there is no transceiver conversion involved, the first time slot is originally used for transceiver.
  • the converted GAP time unit can be used to send data, so that the data transmission resources include not only the resources corresponding to the original PSSCH symbols, but also the GAP time unit; when the first resource is used to receive the second feedback information and the second terminal device is When receiving data in the first time slot, the first time slot is used for the second terminal device to receive information and does not involve transceiver conversion, so the GAP time unit originally used for transceiver conversion can also be used for the first terminal device to receive data. As a result, the resources used to transmit data in the first time slot are increased, and the data transmission speed is improved.
  • the second resource also includes at least one of the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the GAP time unit in the first time slot, and CPE time in the first time slot.
  • the resources corresponding to the unit are not limited to the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the GAP time unit in the first time slot, and CPE time in the first time slot.
  • the second terminal device may also use at least one of resources corresponding to the AGC symbol, resources corresponding to the GAP time unit, and resources corresponding to the CPE time unit to transmit the first data. or secondary data.
  • the method before the second terminal device transmits the target information on the first resource, the method further includes: the second terminal device receives first indication information from the first terminal device, and the first indication information is used to indicate the second terminal device.
  • the second terminal device sends the second data to the first terminal device on the second resource; or, before the second terminal device sends the second feedback information on the first resource, the method further includes: the second terminal device receives data from the first terminal device.
  • Second indication information of the device the second indication information is used to instruct the second terminal device to send the second feedback information to the first terminal device on the first resource.
  • the second terminal device may receive indication information from the first terminal device indicating that the second terminal device The first resource of the terminal device is available, so that the second terminal device can send the second data on the second resource or send the second feedback information on the first resource according to the instruction information of the first terminal device.
  • the second terminal device can share the first resource.
  • the COT of the terminal device uses the terminal device in the first time slot.
  • the target information includes second data
  • the second terminal device sends third indication information
  • the third indication information indicates that the second resource includes the first resource.
  • the second terminal device when it sends data in the first time slot, it indicates whether the resources occupied by the data include PSFCH symbols.
  • the third indication information is 1 bit, and the third indication information sent by the second terminal device has a value of 1, indicating that the resources occupied by the data include PSFCH symbols, and the third indication information sent by the second terminal device has a value of 0. , indicating that the resources occupied by the data do not include PSFCH symbols.
  • the converse is also true.
  • the third indication information is 1 bit.
  • the value of the third indication information sent by the second terminal equipment is 0, indicating that the resources occupied by the data include PSFCH symbols.
  • the third indication information sent by the second terminal equipment is 0.
  • the value is 1, indicating the resources occupied by the data.
  • the source does not include PSFCH symbols.
  • the resources occupied by data include PSFCH symbols, and can also be combined with the previously described PSSCH transmission using at least one of PSSCH symbols, PSFCH symbols, GAP time units, CPE time units, and PSFCH AGC symbols.
  • the second terminal device may receive indication information indicating whether the preconfigured PSFCH resources included in the COT are actually used to transmit PSFCH. It can also be understood as indicating whether the candidate PSFCH resources included in the COT actually include PSFCH resources.
  • the second terminal device can still determine whether to use the PSFCH resource in the PSFCH symbol based on the usage of the PSFCH resource in the PSFCH symbol in the determination method of "determining that the first resource is available based on the second information". For example, the second terminal device receives indication information, which indicates that one time slot in the COT includes PSFCH resources.
  • the part of the resources can be used, that is, the part of the resources are considered to be available resources.
  • the method before the second terminal device transmits the target information on the first resource, the method further includes: the second terminal device determines that the first resource is available based on the second information, and the second information includes at least one of the following: The transmission type of the third data, the HARQ feedback type of the third data, the energy measurement value associated with the third data and whether the second terminal device is the target terminal device of the third data, where the third data is data transmitted on the second time slot.
  • the second time slot is at least one time slot determined based on the feedback timing and the first time slot.
  • the second terminal device determines that the first resource is available based on the second information, including: when the second information satisfies a preset condition, the second terminal device determines that the first resource is available, and the preset condition includes at least the following: One item: the transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to the preset threshold; the second terminal device The terminal device is not the target of the third data.
  • the second terminal device determines whether the second time slot requires feedback resources based on the data transmission situation or SCI information of the second time slot that is associated with the feedback resources (resources included in the PSFCH symbols) of the first time slot.
  • the second time slot is a time slot determined based on the first time slot and feedback timing between PSSCH and PSFCH. There can be more than one second time slot.
  • the feedback resources corresponding to the second time slot are available.
  • the PSFCH of the first time slot can be determined based on all second time slots connected to the first time slot through feedback timing. Whether the resources included in the symbol are fully available or partially available, and a first resource is selected from the available resources for transmitting data or feedback information. For specific details, please refer to the relevant description of method 600 and will not be repeated here.
  • the first terminal device that performs LBT to obtain the COT shares the first time slot in the COT with the second terminal device.
  • the second terminal device can use the PSSCH resource of the first time slot to transmit with the first terminal device.
  • the first resource among the resources included in the PSFCH symbol in the first time slot can be determined by the second terminal device whether it is available, and when the first resource is available, the second terminal device can determine the specific usage mode of the first resource, For example, the second terminal device can use the first resource to transmit data or feedback information.
  • Figure 12 shows a communication device 1200 provided by an embodiment of the present application.
  • the communication device 1200 includes an acquisition unit 1210 and a transceiver unit 1220.
  • the communication device 1200 also includes a determination unit 1230.
  • the communication device 1200 is equivalent to the first terminal device in FIG. 6 and may include units for executing the method in FIG. 6 .
  • each unit in the communication device 1200 and the above-mentioned other operations and/or functions are respectively intended to implement the corresponding processes in FIG. 6 .
  • the communication device 1200 includes: an acquisition unit 1210, used to acquire the channel access time COT, the COT includes a first time slot, and the first time slot includes PSFCH symbols; a transceiver unit 1220, used to transmit the target on the first resource Information, the first resource is a resource in the PSFCH symbol, the target information includes one of the first data, the second data, the first feedback information and the second feedback information, the first data is the communication device 1200 on the first time slot
  • the data to be sent, the second data is the data to be received by the communication device 1200 on the first time slot, the first feedback information is the feedback information to be sent by the communication device 1200, and the second feedback information is the feedback information to be received by the communication device 1200 .
  • the acquisition unit 1210 acquires a COT, which includes a first time slot, and the first time slot includes a PSFCH symbol.
  • the transceiver unit 1220 uses the first resource to transmit target information, thereby reducing the waste of resources included in the PSFCH symbol.
  • the communication device 1200 uses the first resource to prevent other terminal equipment from including it in the PSFCH symbol.
  • the LBT is successful on the resources, reducing the possibility of COT interruption of the communication device 1200.
  • the first resource is used to transmit data, data transmission efficiency can be improved; when the first resource is used to transmit feedback information, the reliability of data transmission of the communication device 1200 can be improved.
  • the target information includes first data or second data
  • the transceiver unit 1220 is specifically configured to: send the first data on the second resource, and the second resource includes the first resource; or, on the second resource, Receive the second data on the second resource, and the second resource includes First resource.
  • the resource part included in the PSFCH symbol is available, and the target information includes one of the first feedback information and the second feedback information.
  • the second resource also includes at least one of the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the GAP time unit in the first time slot, and CPE time in the first time slot.
  • the resources corresponding to the unit are not limited to the following: resources corresponding to the AGC symbols in the first time slot, resources corresponding to the GAP time unit in the first time slot, and CPE time in the first time slot.
  • the resource used by the communication device 1200 to send the first data includes the GAP in the first time slot.
  • the transceiver unit 1220 is configured to transmit target information on the first resource according to at least one item of the first information.
  • the first information includes: the priority of the first data; the priority of the second data. ;The priority of the first feedback information; the priority of the second feedback information.
  • the transceiver unit 1220 is configured to transmit target information on the first resource according to at least one item of the first information.
  • the first information includes: the delay information of the first data; the delay information of the second data. delay information; delay information of the first feedback information; delay information of the second feedback information.
  • the communication device 1200 further includes a determining unit 1230, configured to determine that the first resource is available according to the second information.
  • the second information includes at least one of the following: transmission type of the third data, HARQ feedback of the third data Type, energy measurement value associated with the third data and whether the communication device 1200 is the target terminal device of the third data, where the third data is data transmitted on the second time slot, and the second time slot is based on the feedback timing and the first time slot. At least one time slot determined by the slot.
  • the determining unit 1230 is specifically configured to: determine that the first resource is available when the second information satisfies a preset condition, and the preset condition includes at least one of the following: the transmission type of the third data is broadcast; The transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to the preset threshold; the communication device 1200 is not the target communication device 1200 of the third data.
  • the transceiver unit 1220 is further configured to send first instruction information to the second terminal device, and the first instruction information is used to instruct the second terminal device to send the second data to the communication device 1200 on the second resource;
  • the second instruction information is sent to the second terminal device, and the second instruction information is used to instruct the second terminal device to send the second feedback information to the communication device 1200 on the first resource.
  • Figure 13 shows another communication device 1300 provided by an embodiment of the present application.
  • the communication device 1300 includes a transceiver unit 1310.
  • the communication device 1300 also includes a determining unit 1320.
  • the communication device 1300 is equivalent to the second terminal device in Figure 11, and may include units that perform the method of Figure 11, and each unit in the communication device 1300 and the above-mentioned other operations and/or functions are respectively intended to implement the corresponding processes in Figure 11 .
  • the communication device 1300 includes a transceiver unit 1310, configured to receive COT indication information from the first terminal device.
  • the time unit indicated by the COT indication information includes a first time slot, and the first time slot includes a PSFCH symbol; the transceiver unit 1310, It is also used to transmit target information on the first resource.
  • the first resource is a resource in the PSFCH symbol.
  • the target information includes one of first data, second data, first feedback information and second feedback information.
  • the first data is the data to be received by the communication device 1300 on the first time slot
  • the second data is the data to be sent by the communication device 1300 on the first time slot
  • the first feedback information is the feedback information to be received by the communication device 1300
  • the second feedback The information is feedback information to be sent by the communication device 1300.
  • the transceiver unit 1310 of the communication device 1300 receives the COT indication information of the first terminal device.
  • the communication device 1300 shares the first time slot in the COT of the first terminal device.
  • the first time slot includes PSFCH symbols.
  • the transceiver unit 1310 The target information may be transmitted using a first resource among resources included in the PSFCH symbol.
  • the communication device 1300 can reduce resource waste by using the first resource.
  • the communication device 1300 transmits the target information on the first resource to avoid other terminal equipment LBT at the PSFCH symbol. Successful, causing the COT to be interrupted.
  • the target information includes first data or second data
  • the transceiver unit 1310 is specifically configured to: receive the first data on the second resource, where the second resource includes the first resource; or, on the second resource
  • the second data is sent on two resources, and the second resource includes the first resource.
  • the second resource also includes at least one of the following: resources corresponding to the AGC symbols in the first time slot, The resources corresponding to the GAP time unit in the slot and the resources corresponding to the CPE time unit in the first time slot.
  • the resource used by the communication device 1300 to receive the first data when the first resource is used to receive the first feedback information and the communication device 1300 receives data in the first time slot, the resource used by the communication device 1300 to receive the first data includes the GAP in the first time slot.
  • the resources corresponding to the unit when the first resource is used to send the second feedback information and the communication device 1300 sends data in the first time slot.
  • the transceiver unit 1310 transmits target information on the first resource according to at least one item of the first information.
  • the first information includes: the priority of the first data; the priority of the second data; The priority of feedback information; the priority of second feedback information.
  • the transceiver unit 1310 transmits target information on the first resource according to at least one item of the first information.
  • the first information includes: delay information of the first data; delay information of the second data; The delay information of the first feedback information; the delay information of the second feedback information.
  • the communication device 1300 further includes a determining unit 1320, configured to determine that the first resource is available according to the second information.
  • the second information includes at least one of the following: transmission type of the third data, HARQ feedback of the third data type, the energy measurement value associated with the third data and whether the first terminal device is the target terminal device of the third data, where the third data is data transmitted on the second time slot, and the second time slot is based on the feedback timing and the first At least one time slot determined by the time slot.
  • the transceiver unit 1310 is further configured to receive first instruction information from the first terminal device.
  • the first instruction information is used to instruct the communication device 1300 to send the second data to the first terminal device on the second resource.
  • receive second instruction information from the first terminal device the second instruction information is used to instruct the communication device 1300 to send the second feedback information to the first terminal device on the first resource.
  • the target information includes the second data
  • the transceiver unit 1310 is further configured to send third indication information, and the third indication information indicates that the second resource includes the first resource.
  • Figure 14 shows a communication device 1400 provided by an embodiment of the present application.
  • the communication device 1400 includes an obtaining unit 1410 and a determining unit 1420.
  • the communication device 1400 is equivalent to the first terminal device in Figure 6, and may include a unit that performs step S620 in the method 600 of Figure 6, and each unit in the communication device 1400 and the above-mentioned other operations and/or functions are respectively to implement Figure 6 corresponds to the process.
  • the communication device 1400 includes: an obtaining unit 1410, used to obtain the channel access time COT, the COT includes a first time slot, and the first time slot includes a PSFCH symbol; and a determining unit 1420, used to determine the first time according to the second information.
  • a resource is available, the first resource is a resource in a PSFCH symbol, and the second information includes at least one of the following: a transmission type of the third data, a HARQ feedback type of the third data, an energy measurement value associated with the third data, and whether the communication device 1400
  • the target communication device 1400 is the third data, wherein the third data is data transmitted on the second time slot, and the second time slot is at least one time slot determined according to the feedback timing and the first time slot.
  • the determining unit 1420 is specifically configured to determine that the first resource is available when the second information satisfies a preset condition.
  • the preset condition includes at least one of the following: the transmission type of the third data is broadcast; The transmission type of the data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to the preset threshold; the communication device 1400 is not the target communication device 1400 of the third data.
  • the second time slot is the time slot used by the communication device 1400.
  • Figure 15 shows a communication device 1500 provided by an embodiment of the present application.
  • the communication device 1500 includes a transceiver unit 1510 and a determination unit 1520.
  • the communication device 1500 is equivalent to the second terminal device in Figure 11, and may include a unit that performs step S1120 in the method 1100 of Figure 11, and each unit in the communication device 1500 and the other operations and/or functions described above are respectively intended to implement Figure 11 corresponds to the process.
  • the communication device 1500 includes a transceiver unit 1510, configured to receive COT indication information from the first terminal device.
  • the time unit indicated by the COT indication information includes a first time slot, and the first time slot includes a PSFCH symbol;
  • the determination unit 1520 used to determine that the first resource is available according to the second information, the first resource is a resource in the PSFCH symbol, and the second information includes at least one of the following: the transmission type of the third data, the HARQ feedback type of the third data, the third data Whether the associated energy measurement value and the first terminal device are the target terminal devices of the third data, where the third data is data transmitted on the second time slot, and the second time slot is determined based on the feedback timing and the first time slot at least a time slot.
  • step S620 of method 600 For relevant details of this embodiment, please refer to the detailed description of step S1120 of method 1100, which will not be described again here.
  • the determining unit 1520 is specifically configured to determine that the first resource is available when the second information satisfies the preset condition,
  • the preset conditions include at least one of the following: the transmission type of the third data is broadcast; the transmission type of the third data is unicast or multicast and HARQ feedback is disabled; the energy measurement value associated with the third data is less than or equal to the preset Threshold; the first terminal device is not the target terminal device of the third data.
  • the second time slot is a time slot used by the first terminal device.
  • Figure 16 shows a schematic block diagram of a communication device provided by an embodiment of the present application.
  • the communication device 1600 shown in FIG. 16 may correspond to the communication device described above.
  • the communication device 1600 may be a specific example of the first terminal device or the second terminal device mentioned above.
  • Communication device 1600 includes: processor 1620.
  • the processor 1620 is used to implement corresponding control management operations.
  • the processor 1620 is used to support the device to perform the methods or operations or functions shown in FIG. 6 and FIG. 11 in the aforementioned embodiments.
  • the communication device 1600 may also include: a memory 1610 and a communication interface 1630; the processor 1620, the communication interface 1630, and the memory 1610 may be connected to each other or connected to each other through a bus 1640.
  • the communication interface 1630 is used to support the device to communicate, and the memory 1610 is used to store the program code and data of the device.
  • the processor 1620 calls the code or data stored in the memory 1610 to implement corresponding operations.
  • the memory 1610 may or may not be coupled with the processor.
  • the coupling in the embodiment of this application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information interaction between devices, units or modules.
  • the processor 1620 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with this disclosure.
  • the processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on.
  • Communication interface 1630 may be a transceiver, circuit, bus, module, or other type of communication interface.
  • the bus 1640 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 16, but it does not mean that there is only one bus or one type of bus.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon des modes de réalisation, la présente demande concerne un procédé de communication en liaison latérale et un appareil de communication. Le procédé de communication comprend les étapes suivantes : un premier dispositif terminal acquiert un temps d'occupation de canal (COT), le COT comprenant un premier créneau temporel, et le premier créneau temporel comprenant un symbole PSFCH ; et le premier dispositif terminal transmet des informations cibles sur une première ressource, la première ressource étant une ressource dans le symbole PSFCH, les informations cibles comprenant soit des premières données, soit des secondes données, soit des premières informations de rétroaction, soit des secondes informations de rétroaction, les premières données étant des données à envoyer par le premier dispositif terminal sur le premier créneau temporel, les secondes données étant des données à recevoir par le premier dispositif terminal sur le premier créneau temporel, les premières informations de rétroaction étant des informations de rétroaction à envoyer par le premier dispositif terminal, et les secondes informations de rétroaction étant des informations de rétroaction à recevoir par le premier dispositif terminal. Au moyen du procédé de communication et de l'appareil de communication, un taux d'utilisation de ressources sur une liaison latérale sur un spectre sans licence peut être amélioré, et en outre, la possibilité d'interruption de COT peut être réduite.
PCT/CN2023/110797 2022-08-12 2023-08-02 Procédé de communication en liaison latérale et appareil de communication Ceased WO2024032444A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110545534A (zh) * 2019-09-29 2019-12-06 展讯半导体(南京)有限公司 辅链路通信的资源选择方法、装置及存储介质
US20210400732A1 (en) * 2020-06-18 2021-12-23 Qualcomm Incorporated Sub-channel-based occupancy time sharing for unlicensed sidelink
WO2021262222A1 (fr) * 2020-06-24 2021-12-30 Qualcomm Incorporated Transmission de rétroaction d'accusé de réception pour une communication de liaison latérale dans un spectre sans licence
CN113892276A (zh) * 2021-09-02 2022-01-04 北京小米移动软件有限公司 一种信息传输方法和装置
WO2022126075A1 (fr) * 2020-12-08 2022-06-16 Qualcomm Incorporated Techniques de rétrotransmission de demande de répétition automatique hybride de temps d'occupation de canaux pour une communication de liaison latérale dans un spectre sans licence

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Publication number Priority date Publication date Assignee Title
CN110545534A (zh) * 2019-09-29 2019-12-06 展讯半导体(南京)有限公司 辅链路通信的资源选择方法、装置及存储介质
US20210400732A1 (en) * 2020-06-18 2021-12-23 Qualcomm Incorporated Sub-channel-based occupancy time sharing for unlicensed sidelink
WO2021262222A1 (fr) * 2020-06-24 2021-12-30 Qualcomm Incorporated Transmission de rétroaction d'accusé de réception pour une communication de liaison latérale dans un spectre sans licence
WO2022126075A1 (fr) * 2020-12-08 2022-06-16 Qualcomm Incorporated Techniques de rétrotransmission de demande de répétition automatique hybride de temps d'occupation de canaux pour une communication de liaison latérale dans un spectre sans licence
CN113892276A (zh) * 2021-09-02 2022-01-04 北京小米移动软件有限公司 一种信息传输方法和装置

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