WO2024061130A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication Download PDF

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Publication number
WO2024061130A1
WO2024061130A1 PCT/CN2023/119149 CN2023119149W WO2024061130A1 WO 2024061130 A1 WO2024061130 A1 WO 2024061130A1 CN 2023119149 W CN2023119149 W CN 2023119149W WO 2024061130 A1 WO2024061130 A1 WO 2024061130A1
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WO
WIPO (PCT)
Prior art keywords
transmission
time
cot
terminal device
nth
Prior art date
Application number
PCT/CN2023/119149
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English (en)
Chinese (zh)
Inventor
焦瑞晟
何泓利
刘云
黎超
薛丽霞
Original Assignee
华为技术有限公司
Priority date (The priority date 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 date listed.)
Filing date
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Publication of WO2024061130A1 publication Critical patent/WO2024061130A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the present application relates to the field of communication, and in particular to communication methods and communication devices in the field of communication.
  • terminal direct-connect communication can be extended to unlicensed spectrum with larger bandwidth, that is, sidelink-unlicensed (SL-U).
  • LBT channel listening
  • LBT listen-before-talk
  • type 1 LBT requires counter rollback, and the listening channel time is generally longer; type 2 LBT only needs to listen to the channel for a fixed period of time, and the listening time is generally short, so it is also called one-shot LBT.
  • the terminal device can seize the channel occupancy time (COT) and share the time-frequency resources in the COT with other terminal devices.
  • This terminal device is called the initial terminal device.
  • Others The terminal device needs to access the channel through type 2 LBT before transmitting. Since type 2 LBT has a high probability of requiring shorter channel listening time than type 1 LBT, it can increase the probability of other terminal devices sharing the COT accessing the channel.
  • type 2 LBT has a high probability of requiring shorter channel listening time than type 1 LBT, it can increase the probability of other terminal devices sharing the COT accessing the channel.
  • the other terminal devices do not know to use the time-frequency resources in multiple different COTs. Which time-frequency resource or resources are used for transmission, which will affect the transmission of other terminal devices.
  • Embodiments of the present application provide a communication method and a communication device.
  • the first terminal device determines which time-frequency resource or resources among multiple different COTs are used for transmission.
  • a communication method is provided, which can be executed by a first terminal device, or by a component of the first terminal device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the first terminal device.
  • a component of the first terminal device such as a processor, a chip, or a chip system, etc.
  • a logic module or software that can implement all or part of the first terminal device. The following description is based on an example of the method being executed by the first terminal device.
  • the communication method includes: receiving N messages, the nth message includes first indication information, and the first indication information is used to instruct the nth transmission of the first terminal device to use the nth time in the nth channel occupancy time COT.
  • the number of transmissions frequency division multiplexed with the n-th transmission in the n-th COT it is determined that at least one of the N transmissions is transmitted on at least one time-frequency resource among the N time-frequency resources.
  • the first terminal device may determine to transmit the N transmissions on at least one time-frequency resource among the N time-frequency resources according to the number of transmissions frequency division multiplexed with the n-th transmission in the n-th COT. At least one transmission of N time-frequency resources belongs to the first time slot.
  • the first terminal device determines to transmit on the first time slot, it considers the number of frequency-division multiplexed transmissions in the n-th COT with the n-th transmission to avoid the first terminal device being unable to determine the use of N time-frequency resources. Which resources are transmitted.
  • the time-frequency resources after the first time slot in the n-th COT may be preempted by terminal equipment of other communication technologies, resulting in the failure of the terminal equipment sharing the n-th COT to use
  • the first terminal device can avoid the interruption of the n-th COT, so that other time-frequency resources in the n-th COT can be shared with other terminals equipment to increase the probability of other terminal equipment accessing the channel.
  • N time-frequency resources belong to the first time slot, which can be understood as: the first time-frequency resource in the first COT among the N COTs, the second time-frequency resource in the second COT,..., The Nth time-frequency resource in the Nth COT, the 1st time-frequency resource, the 2nd time-frequency resource,..., the Nth time-frequency resource, these N time-frequency resources belong to the first time slot, also That is to say, N time-frequency resources in N COTs belong to the first time slot.
  • the n-th message is a message among the N messages.
  • the number of transmissions in the nth COT that are frequency division multiplexed with the nth transmission can be replaced by: the number of transmissions in the nth COT that are frequency division multiplexed with the nth transmission in the same time slot, or It can be replaced by: the number of transmissions in the n-th COT that are in the same time slot as the n-th transmission but have different frequency domain resources.
  • the original meaning of the nth COT is the channel occupancy time.
  • the nth COT itself is a time domain concept.
  • the nth time-frequency resource can be understood as referring to the time-frequency resource of the time-frequency resource.
  • One or more RB sets used by terminal equipment located within the channel occupancy time in the domain and located in the initial n-th COT in the frequency domain to seize the n-th COT through type 1 LBT; transmission representation within the n-th COT
  • the time-frequency resources occupied by this transmission are the time-frequency resources within the nth COT.
  • the terminal device that sends the n-th message may also be called the initial terminal device of the n-th COT or the initial terminal device of the n-th COT or the terminal device that preempts the n-th COT.
  • the terminal device that sends the nth message can share the channel with the first terminal device, where the shared channel can be understood as the first terminal device can access the channel through type 2 LBT in the nth COT according to the nth message.
  • the number of transmissions frequency division multiplexed with the nth transmission in the nth COT is determined based on the nth message sent by the terminal device of the initial nth COT.
  • the actual number of transmissions frequency division multiplexed with the nth COT in the nth COT may differ from the number determined based on the nth message sent by the end device of the initial nth COT, possibly due to, for example, half-duplex issues , or other reasons, the embodiments of this application do not limit this.
  • the first indication information is used to indicate that the n-th transmission of the first terminal device and the n-th transmission use the n-th time-frequency resource in the n-th COT. That is to say, the first indication information indicates that the n-th transmission uses the n-th time-frequency resource in the n-th COT. transmission and the nth time-frequency resource corresponding to the nth transmission.
  • the first terminal device may receive N messages at the same time, or may receive N messages separately.
  • the first terminal device may determine the number of transmissions frequency division multiplexed with the n-th transmission in the n-th COT based on the n-th message, or the first terminal device may determine the number of transmissions frequency-division multiplexed with the n-th transmission in the n-th COT based on other messages.
  • the number of transmissions frequency division multiplexed with the n-th transmission in the n-th COT it is determined to transmit at least one of the N transmissions on at least one time-frequency resource among the N time-frequency resources, including : Determine the priority of the n-th transmission based on the number of frequency-division multiplexed transmissions with the n-th transmission in the n-th COT, and determine at least one time-frequency among the N time-frequency resources based on the priority of the n-th transmission. At least one of the N transmissions is transmitted on the resource.
  • the first terminal device is a terminal device that can share time-frequency resources in the n-th COT.
  • the time-frequency resources in the n-th COT can be shared.
  • the receiving end of the n-th transmission of the first terminal device includes sending the n-th COT.
  • the first terminal device can share the time-frequency resources in the n-th COT.
  • the embodiment of the present application does not limit the conditions for the first terminal device to satisfy the n-th COT, and other conditions may also be used.
  • the terminal device that preempts the n-th COT may send the n-th message to the first terminal device, thereby instructing the first terminal device to use the n-th time-frequency resource in the n-th COT.
  • the number of transmissions frequency-division multiplexed with the n-th transmission in the n-th COT can be understood as: the time-frequency resources occupied by M transmissions in the n-th COT and the time-frequency resources occupied by the n-th transmission The resources are located in the same time slot, then the number of transmissions frequency division multiplexed with the nth transmission in the nth COT is M.
  • the number of transmissions frequency division multiplexed with the nth transmission in the nth COT is based on the initial nth transmission. Determined by the nth message sent by the terminal device of a COT.
  • the actual transmission frequency multiplexed with the nth transmission in the nth COT The actual number may differ from the number determined based on the nth message sent by the end device of the initial nth COT.
  • a transmission represents a message whose sender and receiver are determined.
  • At least two transmissions among the N transmissions may be the same transmission.
  • At least one time-frequency resource corresponds to at least one transmission, that is, at least one time-frequency resource is determined among N time-frequency resources, and at least one transmission corresponding to the at least one time-frequency resource is performed on the at least one time-frequency resource.
  • the first terminal device determines to transmit a first transmission on a first time-frequency resource, a second transmission on a second time-frequency resource, and so on, that is, the first terminal device determines to transmit a transmission on a time-frequency resource.
  • the nth message includes second indication information
  • the second indication information indicates the number of transmissions in the nth COT that are frequency division multiplexed with the nth transmission.
  • the second indication information included in the nth message among the N messages can indicate the number of transmissions frequency division multiplexed with the nth transmission in the nth COT
  • the second indication information in the N messages can be Indicate N quantities, and the N quantities correspond to N transmissions. That is to say, the n-th message includes first indication information and second indication information, where the first indication information indicates that the n-th transmission of the first terminal device uses the For the nth time-frequency resource in n COTs, the second indication information indicates the number of transmissions in the nth COT that are frequency division multiplexed with the nth transmission.
  • the nth message includes third indication information indicating the number of transmissions in the nth COT frequency-division multiplexed with the nth transmission, and the transmissions frequency-division multiplexed with the nth transmission do not include transmissions of the terminal device that sends the nth message.
  • the third indication information included in the nth message among N messages can indicate the number of transmissions frequency-division multiplexed with the nth transmission in the nth COT, but the transmissions frequency-division multiplexed with the nth transmission do not include the transmissions of the terminal device that sends the nth message. That is, the transmissions of the terminal device of the initial nth COT that sends the nth message are not included in the number of transmissions frequency-division multiplexed with the nth transmission in the nth COT indicated by the third indication information.
  • the third indication information in N messages can indicate a total of N quantities, and the N quantities correspond to the N transmissions.
  • the nth message includes the first indication information and the third indication information, wherein the first indication information indicates that the nth transmission of the first terminal device uses the nth time-frequency resource in the nth COT, and the third indication information indicates the number of transmissions frequency-division multiplexed with the nth transmission in the nth COT, and the transmissions frequency-division multiplexed with the nth transmission in the above-mentioned nth COT do not include the transmissions of the terminal device that sends the nth message.
  • the nth message includes time-frequency resource allocation information in the nth COT, and the time-frequency resource allocation information is included in the nth COT in addition to the transmission of the terminal device that sends the nth message.
  • the time-frequency resource allocation information of all transmissions; the method also includes: according to the time-frequency resource allocation information in the n-th COT, determine the number of transmissions in the n-th COT that are frequency division multiplexed with the n-th transmission, and the n-th The transmission frequency division multiplexed with the nth transmission in the COT does not include the transmission of the terminal sending the nth message; wherein the time-frequency resource allocation information in the nth COT includes the first indication information.
  • the time-frequency resource allocation information of the n-th COT included in the n-th message does not include the transmission time-frequency resource information of the terminal device that sends the n-th message. That is to say, the time-frequency resource allocation information includes the n-th COT. Resource allocation information for all transmissions of other terminal devices in the COT except the terminal device that sends the n-th message. In this way, the frequency-division multiplexed transmission with the n-th transmission in the n-th COT determined by the first terminal device will not Transmission including the initial nth COT of the end device sending the nth message.
  • the nth message includes time-frequency resource allocation information
  • the time-frequency resource allocation information indicates the time-frequency resource allocation in the n-th COT
  • the time-frequency resource allocation in the n-th COT also includes the time-frequency resource allocation to the first
  • the time-frequency resource allocation information in the nth COT included in the nth message may also include the first indication information.
  • the time-frequency resource allocation information indicates the transmission of other terminal devices in the n-th COT except the transmission of the terminal device that sends the n-th message and the time-frequency resources occupied by these transmissions.
  • the nth message includes frequency division multiplexing information.
  • the frequency division multiplexing information is used to indicate that the time-frequency resource used for transmission by the terminal device sending the nth message is located between the nth time-frequency resource and the nth time-frequency resource.
  • the resource allocation information and frequency division multiplexing information determine the number of transmissions in the nth COT that are frequency division multiplexed with the nth transmission.
  • the first terminal device determines the number of transmissions in the n-th COT that are frequency-division multiplexed with the n-th transmission based on the time-frequency resource allocation information and frequency division multiplexing information in the n-th COT. That is to say, the first terminal device needs to be divided into The allocation information determines the time-frequency resources allocated in the n-th COT to other terminal equipment except the terminal equipment that sends the n-th message. According to the time-frequency resources allocated in the n-th COT to other terminal equipment except the terminal equipment that sends the n-th message.
  • Time-frequency resources estimate the number of transmissions frequency division multiplexed with the nth transmission in the nth COT (the transmissions frequency division multiplexed with the nth transmission in the nth COT do not include the transmission of the terminal device sending the nth message ). Further, the first terminal device can determine according to the frequency division multiplexing information whether the time-frequency resource used for transmission by the terminal device sending the n-th message is located in the same time slot as the n-th time-frequency resource. If the first terminal device determines according to the frequency division multiplexing information, The division multiplexing information determines that the time-frequency resource used for transmission by the terminal device sending the n-th message is in the same time slot as the n-th time-frequency resource.
  • the n-th COT estimated above is combined with the n-th transmission frequency-division multiplexing information.
  • the number of transmissions used plus one is used to determine the number of transmissions in the n-th COT frequency-division multiplexed with the n-th transmission.
  • the method further includes: performing a first transmission in at least one transmission on a first time-frequency resource in at least one time-frequency resource, and a transmission in the first COT that is frequency division multiplexed with the first transmission.
  • the number is the smallest number among the number of transmissions frequency division multiplexed with the n-th transmission in the n-th COT, and the first time-frequency resource is located in the first COT.
  • the method further includes: receiving a first message, the first message including fourth indication information, the fourth indication information being used to instruct the second transmission of the first terminal device to use the second time in the second COT. frequency resource, the second time-frequency resource belongs to the second time slot, the first time slot is different from the second time slot, the first transmission and the second transmission are the same transmission; sending the first sidelink associated with the first transmission Control information SCI, the first SCI indicates the first time-frequency resource and the second time-frequency resource, and the second transmission is performed on the second time-frequency resource.
  • the first SCI associated with the first transmission may indicate these two time-frequency resources. time-frequency resources, so that the receiving end of the first transmission can jointly demodulate the transmissions on the two time-frequency resources according to the first SCI, thereby improving demodulation performance.
  • a communication method is provided.
  • the communication method can be executed by the first terminal device, or can be executed by a component of the first terminal device (such as a processor, a chip, or a chip system, etc.), or can be implemented by Logic modules or software implementation of all or part of the first terminal device.
  • the following description takes the method being executed by the first terminal device as an example.
  • the communication method includes: seizing the first channel occupancy time COT for the first transmission; receiving a first message, the first message indicating the second COT that the second terminal device seizes for the second transmission; and the first terminal device sharing the first COT.
  • the first time-frequency resource does not include the second time-frequency resource
  • the second time-frequency resource is a resource in which the first COT and the second COT overlap.
  • the first terminal device may serve as an avoidance terminal device and does not allocate time-frequency resources in the first COT that overlap with the second COT.
  • overlapping time-frequency resources are given up to the second terminal device with a high priority, so that the second terminal device can share the time-frequency resources with other terminal devices, thereby avoiding conflicts when sharing time-frequency resources.
  • the first terminal device sharing the first time-frequency resource in the first COT may include: the first terminal device sharing the first time-frequency resource in the first COT with the third terminal device.
  • the first terminal device is the terminal device of the initial first COT, and the first terminal device shares the first time-frequency resource in the first COT with the third terminal device, which may include: the first terminal device shares the first time-frequency resource with the third terminal device Send a message instructing the third terminal device to access the channel preempted by the first terminal device.
  • the third terminal device accesses the channel preempted by the first terminal device through the second type LBT in the first COT.
  • the third terminal device preempts the channel. After reaching the access channel, the first time-frequency resource is used for transmission.
  • the first message includes first sidelink control information SCI.
  • the first SCI is used to indicate the packet priority of the second transmission of the second terminal device, and the packet priority of the first transmission is lower than the packet priority of the second transmission.
  • the first terminal device can compare the packet priority of the first transmission and the packet priority of the second transmission. If the packet priority of the first transmission is lower than the packet priority of the second transmission, the first terminal device
  • the terminal equipment that can be used as an avoidance device does not allocate time-frequency resources in the first COT that overlap with the second COT. Thus, overlapping resources are given up to the second terminal device with a high packet priority, so that the second terminal device can share them with other terminal devices.
  • the first SCI is used to indicate the channel access priority of the second transmission of the second terminal device, and the channel access priority of the first transmission is lower than the channel access priority of the second transmission.
  • the first terminal device can compare the channel access priority of the first transmission with the channel access priority of the second transmission. If the channel access priority of the first transmission is lower than the channel access priority of the second transmission, the first terminal device can be used as an avoidance terminal device and not allocate the time-frequency resources in the first COT that overlap with the second COT. In this way, the overlapping resources are given to the second terminal device with a high channel access priority, so that the second terminal device can share them with other terminal devices.
  • the first SCI is used to indicate the packet priority and channel access priority of the second transmission of the second terminal device, and the packet priority of the first transmission is lower than the packet priority of the second transmission.
  • the first terminal device may preferentially compare the packet priority of the first transmission and the packet priority of the second transmission. If the packet priority of the first transmission is lower than the packet priority of the second transmission, the comparison will no longer be performed.
  • the first terminal device can be used as an avoidance terminal device and does not allocate time-frequency resources in the first COT that overlap with the second COT. Thus, overlapping resources are given up to the second terminal device with a high packet priority, so that the second terminal device can share them with other terminal devices.
  • the first SCI is used to indicate the packet priority and channel access priority of the second transmission of the second terminal device, and the channel access priority of the first transmission is lower than the channel access priority of the second transmission. Enter priority.
  • the first terminal device may preferentially compare the channel access priority of the first transmission and the channel access priority of the second transmission. If the channel access priority of the first transmission is lower than the channel access priority of the second transmission, Enter the priority level, no longer compare the packet priority of the first transmission and the packet priority of the second transmission, the first terminal device can be used as an avoidance terminal device, and no time-frequency resources in the first COT that overlap with the second COT are allocated. Thus, overlapping resources are given up to the second terminal device with a high channel access priority, so that the second terminal device can share it with other terminal devices.
  • the first SCI is used to indicate the packet priority and channel access priority of the second transmission of the second terminal device
  • the packet priority of the first transmission is equal to the packet priority of the second transmission
  • the packet priority of the second transmission is equal to the packet priority of the second transmission.
  • the channel access priority of one transmission is lower than the channel access priority of the second transmission.
  • the first terminal device can preferentially compare the packet priority of the first transmission and the packet priority of the second transmission. If the packet priority of the first transmission is equal to the packet priority of the second transmission, continue to compare the first transmission. The channel access priority of the first transmission and the channel access priority of the second transmission. If the channel access priority of the first transmission is lower than the channel access priority of the second transmission, the first terminal device can be used as the avoidance terminal device, Time-frequency resources in the first COT that overlap with the second COT are not allocated. Thus, overlapping resources are given up to the second terminal device with a higher packet priority, so that the second terminal device can share them with other terminal devices.
  • the first SCI is used to indicate the packet priority and channel access priority of the second transmission of the second terminal device, and the channel access priority of the first transmission is equal to the channel access priority of the second transmission. Priority, the packet priority of the first transmission is lower than the packet priority of the second transmission.
  • the first terminal device may preferentially compare the channel access priority of the first transmission and the channel access priority of the second transmission, if the channel access priority of the first transmission is equal to the channel access priority of the second transmission Priority, continue to compare the packet priority of the first transmission and the packet priority of the second transmission. If the packet priority of the first transmission is lower than the packet priority of the second transmission, the first terminal device can be used as an avoidance terminal device. Time-frequency resources in the first COT that overlap with the second COT are not allocated. Thus, overlapping resources are given up to the second terminal device with a high packet priority, so that the second terminal device can share them with other terminal devices.
  • the second SCI associated with the first transmission is the SCI that first indicates the time-frequency resource occupied by the first transmission.
  • the first transmission is an aperiodic transmission by the first terminal device, or the first transmission in a periodic transmission
  • the second SCI is the first SCI of the periodic transmission. That is to say, before the first terminal device seizes the first COT for the first transmission, other terminal devices (for example, the second terminal device) cannot learn the information about the first transmission of the first terminal device.
  • a communication method is provided.
  • the communication method can be executed by a second terminal device, or can be executed by a component of the second terminal device (such as a processor, a chip, or a chip system, etc.), or can be implemented by Logic modules or software implementation of all or part of the second terminal device.
  • the following description takes the method being executed by the second terminal device as an example.
  • the communication method includes: receiving third sidelink control information SCI, the third SCI indicating the first COT that the first terminal device seizes for the first transmission and the priority of the first transmission; and the second transmission of the second terminal device. Seize the second COT; share the third time-frequency resource.
  • the third time-frequency resource includes the second time-frequency resource.
  • the second time-frequency resource is the resource where the first COT and the second COT overlap.
  • the priority of the second transmission is higher than that of the second COT.
  • the priority of a transmission is a transmission.
  • the second terminal device may share the second time-frequency resource in the first COT that overlaps with the second COT.
  • the third SCI is used to indicate a packet priority of a first transmission of the first terminal device, and a packet priority of a second transmission is higher than a packet priority of the first transmission.
  • the second terminal device can compare the packet priority of the second transmission with the packet priority of the first transmission. If the priority of the transmitted packet is higher than the priority of the first transmitted packet, the second terminal device shares the second time-frequency resource where the first COT overlaps with the second COT.
  • the priority of the second transmission is higher than the priority of the first transmission, specifically: the packet priority of the second transmission is higher than the packet priority of the first transmission.
  • the third SCI is used to indicate the channel access priority of the first transmission of the first terminal device, and the channel access priority of the second transmission is higher than the channel access priority of the first transmission.
  • the second terminal device can compare the channel access priority of the second transmission and the channel access priority of the first transmission, if the channel access priority of the second transmission is higher than the channel access priority of the first transmission priority, the second terminal device shares the second time-frequency resource overlapping the first COT and the second COT.
  • the priority of the second transmission is higher than the priority of the first transmission, specifically: the channel access priority of the second transmission is higher than the channel access priority of the first transmission.
  • the third SCI is used to indicate the packet priority and channel access priority of the first transmission of the first terminal device; wherein the packet priority of the second transmission is higher than the packet priority of the first transmission.
  • the second terminal device can preferentially compare the packet priority of the first transmission and the packet priority of the second transmission. If the packet priority of the second transmission is higher than the packet priority of the first transmission, the comparison will no longer be performed. If the channel access priority of the second transmission is equal to the channel access priority of the first transmission, then the second terminal device shares the second time-frequency resource where the first COT and the second COT overlap.
  • the priority of the second transmission is higher than the priority of the first transmission, specifically: the packet priority of the second transmission is higher than the packet priority of the first transmission.
  • the third SCI is used to indicate the packet priority and channel access priority of the first transmission of the first terminal device; the channel access priority of the second transmission is higher than the channel access priority of the first transmission. Enter priority.
  • the second terminal device may preferentially compare the channel access priority of the first transmission and the channel access priority of the second transmission. If the channel access priority of the second transmission is higher than the channel access priority of the first transmission, Enter the priority, and no longer compare the packet priority of the second transmission with the packet priority of the first transmission, then the second terminal device shares the second time-frequency resource where the first COT and the second COT overlap.
  • the priority of the second transmission is higher than the priority of the first transmission, specifically: the channel access priority of the second transmission is higher than the channel access priority of the first transmission.
  • the third SCI is used to indicate the packet priority and channel access priority of the first transmission of the first terminal device; wherein the packet priority of the second transmission is equal to the packet priority of the first transmission. , the channel access priority of the second transmission is higher than the channel access priority of the first transmission.
  • the second terminal device can preferentially compare the packet priority of the second transmission with the packet priority of the first transmission. If the packet priority of the second transmission is equal to the packet priority of the first transmission, continue to compare the channel access priority of the second transmission with the channel access priority of the first transmission. If the channel access priority of the second transmission is higher than the channel access priority of the first transmission, the second terminal device shares the second time-frequency resources where the first COT overlaps with the second COT.
  • the priority of the second transmission is higher than the priority of the first transmission, specifically: the packet priority of the second transmission is equal to the packet priority of the first transmission, and the channel access priority of the second transmission is higher than that of the first transmission.
  • a transmission channel access priority is higher than that of the first transmission.
  • the third SCI is used to indicate the packet priority and channel access priority of the first transmission of the first terminal device; the channel access priority of the second transmission is equal to the channel access priority of the first transmission. Priority, the priority of the second transmitted packet is higher than the priority of the first transmitted packet.
  • the second terminal device may preferentially compare the channel access priority of the second transmission with the channel access priority of the first transmission, if the channel access priority of the second transmission is equal to the channel access priority of the first transmission Priority, continue to compare the packet priority of the second transmission and the packet priority of the first transmission. If the packet priority of the second transmission is higher than the packet priority of the first transmission, the second terminal device shares the first COT and the first transmission. The second time-frequency resource overlapping the two COTs.
  • the priority of the second transmission is higher than the priority of the first transmission, specifically: the channel access priority of the second transmission is equal to the channel access priority of the first transmission, and the packet priority of the second transmission is higher.
  • the packet priority for the first transmission is higher than the priority of the first transmission.
  • a communication device including a module or unit for executing a method in any of the above aspects or any possible implementation of any of the above aspects.
  • a communication device including a processor, the processor is coupled to a memory, and the memory is used to store calculations.
  • the processor is configured to execute the computer program or instructions stored in the memory to implement any of the above aspects or the method in any possible implementation manner of any of the above aspects.
  • the device further includes a memory coupled to the processor.
  • processors there are one or more processors, and/or one or more memories.
  • the memory may be integrated with the processor, or the memory may be separately provided with the processor.
  • the device further includes a communication interface, and the processor is coupled to the communication interface.
  • the device is a terminal.
  • the communication interface may be a transceiver, or an input/output interface.
  • the device is a chip of a terminal.
  • the communication interface may be an input/output interface.
  • a sixth aspect provides a chip, which is characterized in that it includes: a processor for calling and running a computer program from a memory, so that a communication device installed with the chip executes any of the above aspects or any of the above aspects. method in any of the possible implementations.
  • a processor including: an input circuit, an output circuit and a processing circuit.
  • the processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor performs the method in any of the above aspects or any possible implementation of any aspect.
  • the above-mentioned processor can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, the receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by the transmitter, and the input circuit and the output A circuit may be the same circuit that functions as an input circuit and an output circuit at different times.
  • This application does not limit the specific implementation methods of the processor and various circuits.
  • An eighth aspect provides a communication system, including the first terminal device of the first aspect and a terminal device that sends N messages, or the first terminal device of the second aspect and the second terminal device of the third aspect.
  • a computer program product includes: a computer program (which can also be called a code, or an instruction).
  • a computer program which can also be called a code, or an instruction.
  • the computer program When the computer program is run, it causes the computer to execute any of the above aspects or aspects. method in any of the possible implementations.
  • a computer-readable storage medium stores a computer program (which can also be called a code, or an instruction).
  • a computer program which can also be called a code, or an instruction.
  • the computer program When the computer program is run on a computer, it causes the computer to execute any of the above. Aspect or a method in any possible implementation of any aspect.
  • a chip including a processor for calling and running a computer program from a memory, so that a communication device installed with the chip executes any of the above aspects or any possible implementation of any of the aspects. method within the method.
  • FIG1 is a schematic diagram of a communication system provided in an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a COT provided by an embodiment of the present application.
  • Figure 3 is a schematic diagram of time-frequency resources in COT provided by the embodiment of the present application.
  • Figure 4 is a schematic diagram of a communication method provided by an embodiment of the present application.
  • Figure 5 is a schematic diagram of time-frequency resources in another COT provided by an embodiment of the present application.
  • Figure 6 is a schematic diagram of time-frequency resources in yet another COT provided by an embodiment of the present application.
  • FIG7 is a schematic diagram of time-frequency resources in another COT provided in an embodiment of the present application.
  • Figure 8 is a schematic diagram of another communication method provided by an embodiment of the present application.
  • Figure 9 is a schematic diagram of time-frequency resources in yet another COT provided by an embodiment of the present application.
  • Figure 10 is a schematic diagram of time-frequency resources in yet another COT provided by an embodiment of the present application.
  • Figure 11 is a schematic diagram of yet another communication method provided by an embodiment of the present application.
  • Figure 12 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • At least one of the following or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items).
  • at least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, a and b and c, where a, b, c Can be single or multiple.
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same functions and effects. Those skilled in the art can understand that words such as “first” and “second” do not limit the number and execution order, and words such as "first” and “second” do not limit the number and execution order.
  • LTE long term evolution
  • 5G fifth generation
  • NR new radio
  • the technical solutions of the embodiments of this application can be applied to direct communication between terminal devices (device to device, D2D).
  • terminal devices device to device, D2D
  • vehicle-to-vehicle communication V2V
  • vehicle-to-pedestrian communication V2P
  • vehicle-to-network vehicle-to-network
  • V2I vehicle-to-infrastructure communication
  • Another example is indoor commercial scenarios, such as communication between mobile phones and smart screens, communication between mobile phones and VR glasses, etc.
  • FIG. 1 shows a schematic block diagram of a communication system suitable for this application.
  • the system 100 includes two communication interfaces, namely PC5 interface and Uu interface.
  • the PC5 interface is a direct communication interface between two terminal devices (such as the terminal device 110 and the terminal device 120 shown in the figure, or the terminal device 110 and the terminal device 130, or the terminal device 120 and the terminal device 130).
  • the terminal device The direct communication link between them is also defined as a sidelink or sidelink (SL).
  • the Uu interface is an interface for communication between a terminal device (eg, the terminal device 110 or the terminal device 120) and the network device 140.
  • the network device 140 may be: a base station, an evolved node B (eNB), a home base station, an access point (AP) in a wireless fidelity (wireless fidelity, WIFI) system, a wireless relay node, Wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc., can also be a gNB in the NR system, or can also be a component or part of the equipment that constitutes the base station, such as Convergence unit (central unit, CU), distributed unit (distributed unit, DU) or baseband unit (baseband unit, BBU), etc.
  • Convergence unit central unit, CU
  • distributed unit distributed unit
  • DU baseband unit
  • BBU baseband unit
  • the terminal device 110 or the terminal device 120 or the terminal device 130 in the communication system may also be called a terminal, user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), etc.
  • the terminal device in the embodiment of this application can be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, or can be used in virtual reality (VR), augmented reality (AR) ), industrial control, self-driving, remote medical, smart grid, transportation safety, smart city and smart home ) wireless terminals in scenarios such as
  • the aforementioned terminal equipment and the chips applicable to the aforementioned terminal equipment are collectively referred to as terminal equipment. It should be understood that the embodiments of this application do not limit the specific technology and specific equipment form used by the terminal equipment.
  • the communication system shown in Figure 1 may also include more nodes, such as more terminal devices or network devices, and the embodiments of the present application will not be shown one by one in the figure.
  • Direct-connect communication with terminal devices can be extended to unlicensed spectrum with larger bandwidth, that is, SL-U.
  • the terminal device Before transmitting on unlicensed spectrum, the terminal device needs to perform an LBT to confirm that the channel is free.
  • LBT is divided into two categories, namely type 1 LBT (i.e. type 1 LBT) and type 2 LBT (i.e. type 2 LBT).
  • type 1 LBT requires counter rollback, and the listening channel time is generally longer; type 2 LBT only needs to listen to the channel for a fixed period of time, and the listening time is generally short, so it is also called one-shot LBT.
  • the longer the channel listening time is, the greater the possibility of detecting that the channel is busy and the lower the probability of accessing the channel.
  • SL can support channel occupancy time sharing (COT sharing).
  • COT sharing channel occupancy time sharing
  • only the terminal device of the initial COT that is, the first device to grab the channel
  • the terminal device of the initial COT grabs the channel, it can share the time-frequency resources in the channel with others.
  • Terminal equipment, other terminal equipment that can share COT only need to perform type 2 LBT before sending. Since type 2 LBT has a high probability of requiring shorter channel listening time than type 1 LBT, it can increase the probability of other terminals sharing the COT accessing the channel.
  • the duration of channel sensing through the first type of LBT is generally longer than the duration of channel sensing through the second type of LBT.
  • the first type of LBT is type 1 LBT and the second type of LBT is type 2 LBT as an example for explanation. It should be understood that type 1 LBT and type 2 LBT may be named differently in different protocols, different versions or different systems, and type 1 LBT and type 2 LBT in this application can be replaced by other names with the same meaning.
  • the terminal device can monitor the channel through the first type of LBT (for example, type 1 LBT) before sending data. If the channel is confirmed to be idle, the terminal device will obtain the right to use the channel within a period of time. This period of time can be called channel occupancy time (COT). At this time, the terminal device is called the initial COT terminal device.
  • the first type of LBT for example, type 1 LBT
  • COT channel occupancy time
  • the time-frequency resources in the COT include one or more resource block (RB) sets in the frequency domain (including 3 sub-channels or 3 interleaves, each sub-channel or each interleave includes multiple PRB) and a period of time in the time domain
  • a RB set can also be called an LBT channel
  • an RB set or an LBT channel includes one or more sub-channels, or includes one or more interleaves
  • a sub-channel or an interleave includes
  • One or more resource blocks (RBs) can be composed of a frequency domain granularity, for example, a frequency domain granularity can be 20MHz.
  • the terminal device 110 monitors the channel through the first type of LBT and determines that channel 1 is idle.
  • the terminal device 110 will obtain the right to use channel 1 within the first period of time.
  • This period can be called COT 1
  • the terminal device 110 can send data in COT 1 (for example, send data to other terminal devices), and at the same time, the terminal device 110 can share the time-frequency resources in COT 1 to other terminal devices for use, such as sharing to terminal device 130 for use.
  • Terminal equipment 110 is the terminal equipment of initial COT 1; terminal equipment 120 monitors the channel through the first type of LBT and determines that channel 2 is idle. The terminal equipment will obtain the right to use channel 2 within the second time period.
  • the terminal device 120 can send data in COT 2 (for example, send data to other terminal devices).
  • the terminal device 120 can share the time-frequency resources in COT 2 with other terminal devices for use, such as sharing it with the terminal device 130 Use, at this time the terminal device 120 is the terminal device of the initial COT 2. Since the terminal device 110 has shared the time-frequency resources of COT 1 with the terminal device 130, and the terminal device 120 has shared the time-frequency resources in COT 2 with the terminal device 130, the terminal device 130 does not know that it is using the time-frequency resources in COT 1.
  • the terminal device 130 does not know whether to transmit on the time-frequency resources shared by the terminal device 110 or on the time-frequency resources shared by the terminal device 120 .
  • the terminal device 110 shares a time-frequency resource in the preempted COT 1 with the terminal device 130
  • the terminal device 120 shares a time-frequency resource in the preempted COT 2 with the terminal device 130.
  • the terminal device 130 A time-frequency resource shared by 110 to the terminal device 130 and a time-frequency resource shared by the terminal device 120 to the terminal device 130 are both in the second time slot.
  • the terminal device 130 does not know which time-frequency resource in the second time slot. For transmission, for example, in the R16 protocol, only one transmission can be sent on one time slot, so the terminal device 130 does not know which time-frequency resource in the second time slot to transmit.
  • the first terminal device may determine to transmit N transmissions on at least one time-frequency resource among the N time-frequency resources based on the number of transmissions frequency division multiplexed with the n-th transmission in the n COTs. At least one transmission in the N time-frequency resources belongs to the first time slot.
  • the first terminal device determines which resources to transmit in the first time slot, the number of transmissions in the n-th COT that are frequency division multiplexed with the n-th transmission is considered, so that the first terminal device can determine which resources to transmit in the n-th COT.
  • At least one transmission is transmitted on at least one time-frequency resource in the COT.
  • the first terminal device may consider the number of transmissions frequency division multiplexed with the nth transmission in the nth COT. For example, the greater the number of transmissions frequency division multiplexed with the nth transmission in the nth COT, Then it is not transmitted on the nth time-frequency resource in the nth COT; the smaller the number of transmissions frequency division multiplexed with the nth transmission in the nth COT, the nth time-frequency resource in the nth COT can be transmitted Transmission on time-frequency resources, that is to say, if the number of frequency-division multiplexed transmissions in the n-th COT with the n-th transmission is very small, try to transmit the n-th time-frequency resource in the n-th COT as much as possible n transmissions, if the nth transmission is not transmitted on the nth time-frequency resource, it will cause the nth COT to be interrupted in the first time slot, then the time-frequency resources after the first time-
  • the first terminal equipment can avoid the n COTs are interrupted, so that other time-frequency resources in the nth COT can be shared with other terminal devices, thereby increasing the probability of other terminal devices accessing the channel.
  • the first terminal device may be the above-mentioned terminal device 130.
  • the terminal device for example, the first terminal device
  • the terminal device in the schematic flow chart may also be a chip, chip system, or processor that supports the terminal device to implement the method, or may be capable of realizing all or part of the functions of the terminal device. logic module or software.
  • the nth terminal device is a terminal device of the initial nth COT
  • the first terminal device is a terminal device that can share the nth COT.
  • the first terminal device may be the terminal device 130 in FIG. 1
  • the N terminal devices may include the terminal device 110 and the terminal device 120 in FIG. 1 .
  • the communication method 400 in the embodiment of the present application is described below with reference to Figure 4. As shown in Figure 4, the communication method 400 includes:
  • N terminal devices send N messages respectively, and the first terminal device receives N messages.
  • the nth message among the N messages includes first indication information, and the first indication information included in the nth message is used to indicate that the nth transmission of the first terminal device uses the nth time in the nth COT.
  • N messages have a one-to-one correspondence with N transmissions
  • N transmissions have a one-to-one correspondence with N time-frequency resources in N COTs.
  • N terminal devices sending N messages respectively in S410 can be understood as: the first terminal device sends the first message, the second terminal device sends the second message,..., the Nth The terminal device sends the Nth message, and a total of N terminal devices send N messages.
  • any two terminal devices among the N terminal devices are different, or at least two terminal devices among the N terminal devices may be the same terminal device. That is to say, when at least two terminal devices among the N terminal devices are the same terminal device, one terminal device can send at least two messages.
  • the N time-frequency resources belonging to the first time slot can be understood as a group of time-frequency resources, and the time-frequency resources in different time slots belong to different groups of time-frequency resources.
  • the first terminal device can receive N messages in chronological order; the first terminal device can also receive N messages at the same time.
  • the embodiment of the present application does not have any limit on the order in which the first terminal device receives N messages.
  • the N messages may be sent by unicast, multicast, or broadcast, or some of the N messages may be sent by broadcast, some of the messages may be sent by multicast, and some of the messages may be sent by unicast.
  • the embodiment of this application does not place any limitation on the sending method of N messages.
  • the first message among the N messages includes the first indication information, and the first indication information included in the first message indicates that the first transmission of the first terminal device uses the first COT.
  • the first time-frequency resource in the COT that is to say, the first transmission uses a time-frequency resource in the first COT;
  • the second message among the N messages includes the first indication information , the first instruction information included in the second message indicates that the second transmission of the first terminal device uses the second time-frequency resource in the second COT, that is, the second transmission uses one of the second COT Time-frequency resources;
  • the Nth message among the N messages includes the first indication information, and the first indication information included in the Nth message indicates that the Nth transmission uses the Nth COT The Nth time-frequency resource.
  • the N terminal devices include UE2 and UE3 shown in Figure 5.
  • the first terminal device is UE1 shown in Figure 4.
  • UE2 needs to transmit to UE4, so UE2 preempts the first transmission from UE2 to UE4.
  • COT UE2 uses a time-frequency resource in the first COT to transmit to UE4.
  • UE2 sends the first message.
  • the first instruction information in the first message instructs UE1 to use the first time-frequency resource in the first COT.
  • resources in addition, the transmission from UE2 to UE5 uses a time-frequency resource in the first COT.
  • UE3 preempts the second COT for the transmission from UE3 to UE6, and the transmission from UE3 to UE6 uses a time-frequency resource in the second COT.
  • UE2 sends the first message, and the first indication information in the first message instructs UE1 to use the first time-frequency resource in the first COT.
  • UE3 sends the second message, and the first instruction information in the second message instructs UE1 to use the second time-frequency resource in the second COT, where the first time-frequency resource and the second time-frequency resource belong to 2nd time slot.
  • the time-frequency resources in the n-th COT can be shared.
  • the receiving end of the n-th transmission of the first terminal device includes sending the n-th COT.
  • the first terminal device can share the time-frequency resources in the n-th COT.
  • the embodiment of the present application does not limit the conditions for the first terminal device to satisfy the n-th COT, and other conditions may also be used.
  • the first terminal device may determine the number of transmissions in the n-th COT that are frequency division multiplexed with the n-th transmission based on the n-th message among the N messages.
  • the first terminal device is described below in four situations.
  • the nth message of the N messages determines the number of transmissions in the nth COT that are frequency division multiplexed with the nth transmission.
  • the n-th message includes second indication information, and the second indication information indicates the number of transmissions in the n-th COT that are frequency division multiplexed with the n-th transmission.
  • the second indication information included in the nth message among the N messages may indicate the number of transmissions frequency division multiplexed with the nth transmission in the nth COT, and the second indication information in the N messages may be Indicates N quantities, which correspond to N transmissions.
  • the second indication information sent by the nth terminal device among the N terminal devices indicates that the nth terminal device preempts the nth transmission frequency division multiplexing with the first terminal device in the nth COT.
  • the number of transmissions in this way, the first terminal device can determine the number of transmissions in the n-th COT that are frequency division multiplexed with the n-th transmission of the first terminal device according to the second indication information in the n-th message.
  • N terminal devices include UE2 and UE3, the first terminal device is UE1, and the second indication information in the first message sent by UE2 can indicate the number of frequency division multiplexing with the first transmission is 1, that is, UE2 learns that the transmission from UE4 to UE5 is frequency-division multiplexed with the first transmission of UE1. Therefore, the second indication information in the first message sent by UE2 indicates that the transmission is frequency-division multiplexed with the first transmission.
  • the number is 1; the second indication information in the second message sent by UE3 can indicate that the number of frequency division multiplexing with the second transmission is 0, that is, UE3 learns that there is no certain transmission in the second COT with the second
  • the second transmission shared to UE1 in the COT is frequency division multiplexed, so the second indication information in the second message sent by UE3 indicates 0.
  • the n-th message may not include the second indication information, but may include the first indication information.
  • the first terminal device After the first terminal device receives N messages, it determines based on the first indication information in the nth message among the N messages that the N transmissions indicated by the first indication information among the N messages are located in the first time slot, and the first The terminal device may send a request message to the n-th terminal device that sends the n-th message, requesting the n-th terminal device to inform the n-th COT of the number of transmissions that are frequency division multiplexed with the n-th transmission of the first terminal device.
  • the n-th terminal device that sends the n-th message can send the second instruction information, and the second instruction information indicates the n-th transmission frequency with the first terminal device in the n-th COT.
  • the number of multiplexed transmissions is the number of multiplexed transmissions.
  • the nth message includes third indication information.
  • the third indication information indicates the number of transmissions in the nth COT that are frequency division multiplexed with the nth transmission.
  • the number of transmissions that are frequency division multiplexed with the nth transmission is The transmission of the terminal device sending the nth message is not included.
  • the third indication information included in the nth message among the N messages may indicate the number of transmissions frequency division multiplexed with the nth transmission in the nth COT, but the transmission of the terminal device that sends the nth message The number of transmissions frequency division multiplexed with the nth transmission in the nth COT is not included. That is to say, the transmission of the nth terminal device sending the nth message is not counted in the number of transmissions frequency division multiplexed with the nth transmission in the nth COT indicated by the third indication information.
  • the three indication information can indicate a total of N quantities, and the N quantities correspond to N transmissions.
  • the n-th terminal device that sends the n-th message is the terminal device that initializes the n-th COT, or is the terminal device that preempts the n-th COT.
  • the third indication information sent by the nth terminal device among the N terminal devices indicates the number of transmissions frequency-division multiplexed with the nth transmission of the first terminal device in the nth COT occupied by the nth terminal device, so that the first terminal device can determine the number of transmissions frequency-division multiplexed with the nth transmission of the first terminal device in the nth COT according to the third indication information in the nth message.
  • the N terminal devices include UE2 and UE3, the first terminal device is UE1, and the third indication information in the first message sent by UE2 can indicate that the number of transmissions frequency-division multiplexed with the first transmission is 0.
  • the third indication information in the first message indicates that the number of transmissions frequency-division multiplexed with the first transmission is 0.
  • the third indication information in the second message sent by UE3 may indicate that the number of transmissions frequency-division multiplexed with the second transmission is 1, and the time-frequency resources used by UE4 for transmission to UE7 are frequency-division multiplexed with the time-frequency resources used by the second transmission of UE1.
  • the third indication information in the second message sent by UE3 indicates that the number of transmissions frequency-division multiplexed with the second transmission is 1.
  • UE3 learns that there is a transmission in the second COT whose time-frequency resources are in the same time slot as the time-frequency resources of the second transmission shared with UE1 in the second COT. Therefore, the third indication information in the second message sent by UE3 indicates 1. It can be understood that among UE1, UE2, UE3, UE4, UE5, UE6 and UE7 in FIG6 , there may be two UEs that are the same UE. For example, UE7 and UE3 may be the same UE, or these UEs may be different UEs, and this is not limited in the embodiments of the present application.
  • the n-th message may not include the third indication information, but may include the first indication information.
  • the first terminal device After the first terminal device receives N messages, it determines based on the first indication information in the nth message among the N messages that the N transmissions indicated by the first indication information among the N messages are located in the first time slot, and the first The terminal device may send a request message to the n-th terminal device that sends the n-th message, requesting the n-th terminal device to inform the n-th COT of the number of transmissions that are frequency division multiplexed with the n-th transmission of the first terminal device.
  • the terminal device that sent the nth message can send The third indication information is sent, and the third indication information indicates the number of transmission frequency division multiplexing of the nth transmission of the first terminal device in the nth COT.
  • the n-th message includes the time-frequency resource allocation information in the n-th COT.
  • the time-frequency resource allocation information includes the time-frequency resource allocation information for the transmission of other terminal devices except the transmission of the terminal device that sent the n-th message.
  • the method further includes: the first terminal device determines the number of transmissions frequency division multiplexed with the nth transmission in the nth COT based on the time-frequency resource allocation information in the nth COT.
  • the time-frequency resource allocation information of the nth COT included in the nth message does not include the transmission of the terminal device that sends the nth message and the time-frequency resources occupied by the transmission of the nth terminal device that sends the nth message, that is, the nth message includes the time-frequency resources occupied by the transmission of other terminal devices in the nth COT except the terminal device that sends the nth message.
  • the transmission of the terminal device of the initial nth COT that sends the nth message is not included in the number of transmissions frequency-division multiplexed with the nth transmission in the nth COT determined by the first terminal device, that is, the number of transmissions frequency-division multiplexed with the nth transmission in the nth COT determined in case three is the same as the number of transmissions frequency-division multiplexed with the nth transmission in the nth COT determined in case two.
  • N terminal devices include UE2 and UE3.
  • UE2 is the UE that seizes the first COT.
  • the first message sent by UE2 includes time-frequency resource allocation information 1, and the time-frequency resource allocation information 1 indicates UE5.
  • the time-frequency resources used for the transmission to UE6 and the time-frequency resource 1 used for the first transmission of UE1 but do not include the time-frequency resources used for the transmission from UE2 to UE5, nor the time-frequency resources used for the transmission from UE2 to UE4.
  • UE1 determines that the number of transmissions frequency division multiplexed with the first transmission is 0 based on the time-frequency resource allocation information 1 included in the first message sent by UE2.
  • UE3 is the UE that seizes the second COT.
  • the second message sent by UE3 includes time-frequency resource allocation information 2.
  • the time-frequency resource allocation information 2 indicates the time-frequency resource used by UE4 for transmission to UE7 and the second transmission use of UE1. time-frequency resources, but does not include the time-frequency resources used by UE3 to transmit to UE6.
  • UE1 determines that the number of transmissions frequency division multiplexed with the second transmission is 1 based on the time-frequency resource allocation information 2 included in the second message sent by UE3. It can be understood that two UEs among UE1, UE2, UE3, UE4, UE5, UE6 and UE7 in Figure 6 may be the same UE. For example, UE6 and UE2 may be the same UE, or these UEs may be different. UE, the embodiment of this application does not limit this.
  • the time-frequency resource allocation information includes transmissions of other terminal devices in the n-th COT other than the transmission of the terminal device sending the n-th message and the time-frequency resources occupied by these transmissions.
  • the nth message also includes frequency division multiplexing information.
  • the frequency division multiplexing information is used to indicate whether the time-frequency resources used for transmission by the terminal device sending the nth message are consistent with the nth time-frequency resource.
  • Frequency resource frequency division multiplexing wherein, the first terminal device determines the number of transmissions in the nth COT that are frequency division multiplexed with the nth transmission according to the time-frequency resource allocation information in the nth COT, including: first The terminal device determines the number of transmissions in the n-th COT that are frequency-division multiplexed with the n-th transmission based on the time-frequency resource allocation information and frequency division multiplexing information in the n-th COT.
  • the first terminal device needs to determine, based on the resource allocation information, the time-frequency resources allocated in the n-th COT to other terminal devices except the terminal device that sends the n-th message.
  • Time-frequency resources of other terminal devices other than the terminal device of the n message estimate the number of transmissions frequency division multiplexed with the nth transmission in the nth COT (transmissions frequency division multiplexed with the nth transmission in the nth COT Excluding the transmission of the terminal device sending the nth message).
  • the first terminal device can determine according to the frequency division multiplexing information whether the time-frequency resource used for transmission by the terminal device sending the n-th message is located in the same time slot as the n-th time-frequency resource.
  • the frequency division multiplexing information determines that the time-frequency resource used for transmission by the terminal device sending the n-th message is located in the same time slot as the n-th time-frequency resource, then the n-th COT estimated above is divided into the n-th transmission frequency The number of multiplexed transmissions plus one determines the number of transmissions in the nth COT that are frequency division multiplexed with the nth transmission.
  • the first message sent by UE2 includes frequency division multiplexing information 1 and time-frequency resource allocation information 1.
  • the time-frequency resource allocation information 1 indicates the time-frequency resources used by UE5 to transmit to UE6 and the time-frequency resources of UE1.
  • frequency division multiplexing information 1 indicates that the time-frequency resource used by UE2 for transmission is frequency-division multiplexed with the first time-frequency resource, and UE1 estimates according to the time-frequency resource allocation information 1 that it is the same as the first time-frequency resource.
  • the number of frequency division multiplexed transmissions for the first transmission is 0.
  • UE1 determines that the number of frequency division multiplexed transmissions for the first transmission is 1 based on the frequency division multiplexing information 1 and 0.
  • the second message sent by UE3 includes frequency division multiplexing information 2 and time-frequency resource allocation information 2.
  • the time-frequency resource allocation information 2 indicates the time-frequency resources used by UE4 to transmit to UE7 and the time used by UE1's second transmission.
  • Frequency resources, frequency division multiplexing information 2 indicates that the time-frequency resources used by UE3 for transmission are not frequency division multiplexed with the second time-frequency resource.
  • UE1 estimates based on the time-frequency resource allocation information 2 that the time-frequency resources used by UE3 are frequency division multiplexed with the second transmission. The number of transmissions is 1.
  • UE1 determines the number of transmissions that are frequency division multiplexed with the second transmission based on the frequency division multiplexing information 2 and 1. The quantity is still 1.
  • UE7 and UE3 may be the same UE, or these UEs may be different.
  • UE, the embodiment of this application does not limit this.
  • the frequency is located in the same time slot.
  • the value of this 1 bit is 0, indicating that the time-frequency resource used for transmission by the terminal device sending the n-th message is located in a different time slot than the n-th time-frequency resource.
  • the n-th message includes time-frequency resource allocation information in the n-th COT.
  • the time-frequency resource allocation information indicates the time-frequency resources for all transmissions in the n-th COT.
  • All transmissions in the n-th COT include sending the Transmission of n messages by a terminal device; the method further includes: the first terminal device determines, based on the time-frequency resource allocation information in the n-th COT, the n-th COT that is frequency division multiplexed with the n-th transmission The number of transfers. That is to say, the n-th message indicates all transmission resources in the n-th COT.
  • the number of transmissions frequency-division multiplexed with the n-th transmission in the n-th COT determined by the first terminal device includes both sending the
  • the transmission of the terminal device of the initial n-th COT of n messages also includes the transmission of other terminal devices, that is, the number and situation of frequency-division multiplexed transmissions in the n-th COT and the n-th transmission determined in case 4 at this time
  • the number of frequency-division multiplexed transmissions in the n-th COT determined in one is the same as that of the n-th transmission.
  • N terminal devices include UE2 and UE3.
  • the first message sent by UE2 includes time-frequency resource allocation information 1.
  • the time-frequency resource allocation information 1 indicates the time-frequency resource used by UE2 to transmit to UE5.
  • the time-frequency resource used by UE2 to transmit to UE4 the time-frequency resource used by UE5 to transmit to UE6, and the first time-frequency resource used by UE1 for the first transmission
  • the first terminal device determines the first time-frequency resource according to the time-frequency resource allocation information 1
  • the transmissions frequency division multiplexed with the first transmission in the first COT are transmissions from UE2 to UE5.
  • the first terminal device determines that the number of transmissions frequency division multiplexed with the first transmission in the first COT is 1.
  • the second message sent by UE3 includes time-frequency resource allocation information 2.
  • Time-frequency resource allocation information 2 includes the time-frequency resource used by UE3 for transmission to UE6, the time-frequency resource used by UE4 for transmission to UE7, and the second transmission use of UE1.
  • the second time-frequency resource, the first terminal equipment determines that the transmission frequency division multiplexed with the second transmission in the second COT is the transmission from UE4 to UE7 according to the time-frequency resource allocation information 2, so the first terminal equipment determines that the transmission of the second time-frequency resource is from UE4 to UE7.
  • the number of transmissions frequency-division multiplexed with the second transmission in 2 COTs is 1. It can be understood that two UEs among UE1, UE2, UE3, UE4, UE5, UE6 and UE7 in Figure 6 may be the same UE. For example, UE7 and UE4 may be the same UE, or these UEs may be different. UE, the embodiment of this application does not limit this.
  • the first terminal device can determine the number of transmissions in the n-th COT that are frequency division multiplexed with the n-th transmission based on the n-th message.
  • the n-th message includes time-frequency resources. Allocation information, the time-frequency resource allocation information of the n-th COT does not indicate the transmission time-frequency resources of the terminal device that sends the n-th message. That is to say, the n-th message indicates that the n-th COT does not send the n-th message. All transmission resources of terminal equipment other than the terminal equipment.
  • the terminal device that sends the n-th message can also send a second message, and the first terminal device can also receive a second message from the terminal device that sends the n-th message.
  • the second message indicates the person in the n-th COT who sends the n-th message.
  • the first terminal device can determine the number of transmissions frequency division multiplexed with the n-th transmission based on the time-frequency resource allocation information in the n-th message and the second message.
  • the number of transmissions frequency division multiplexed with the nth transmission in the nth COT is determined based on the nth message sent by the terminal device of the initial nth COT.
  • the actual number of transmissions frequency division multiplexed with the nth COT in the nth COT may differ from the number determined based on the nth message sent by the end device of the initial nth COT, possibly due to, for example, half-duplex issues , or other reasons, the embodiments of this application do not limit this.
  • the first terminal device may determine the number of transmissions in the n-th COT that are frequency division multiplexed with the n-th transmission according to any of the above situations, thereby determining the priority of the n-th transmission.
  • the lower the number of transfers the higher the priority of the nth transfer.
  • the number of transmissions frequency division multiplexed with the nth transmission in the nth COT is the priority of the nth transmission.
  • the number of frequency-division multiplexed transmissions in the second COT is 2, then the priority of the first transmission is 2, and the number of frequency-division multiplexed transmissions in the second COT is 1, then the second transmission
  • the priority is 1, and the priority 1 of the second transmission is higher than the priority 2 of the first transmission; for another example, the number of transmissions in the n-th COT frequency division multiplexed with the n-th transmission
  • the amount is proportional to the priority value of the nth transmission.
  • the smaller the number of transmissions frequency division multiplexed with the nth transmission in the nth COT, the higher the priority value of the nth transmission, and the number of transmissions frequency division multiplexed with the nth transmission in the nth COT The larger the number, the lower the value of the nth transmission priority. For example, the number of transmissions frequency division multiplexed with the first transmission in the first COT is 4, then the priority of the first transmission is 2, and the priority of the first transmission is 2.
  • the number of transmissions frequency division multiplexed with the second transmission in 2 COTs is 2, then the priority of the second transmission is 1, and the priority 1 of the second transmission is higher than the priority 2 of the first transmission.
  • the number of frequency-division multiplexed transmissions in the n-th COT is inversely proportional to the priority value of the n-th transmission. The higher the priority value, the higher the priority of the n-th transmission. High, the lower the priority value, the lower the priority of the nth transmission, so that the number of transmissions frequency division multiplexed with the nth transmission in the nth COT is smaller, and the value of the priority of the nth transmission is smaller.
  • the number is higher.
  • the number of transmissions used is 4, so the priority of the first transmission is 2.
  • the number of transmissions frequency division multiplexed with the second transmission in the second COT is 2, so the priority of the second transmission is 4.
  • the priority level 4 of the second transfer is higher than the priority level 2 of the first transfer.
  • the priority of the nth transmission can also be understood as the priority of the nth time-frequency resource. That is to say, the priority of the nth transmission and the priority of the nth time-frequency resource can be replaced with each other.
  • the priority of the nth transmission and the priority of the nth time-frequency resource can be replaced with each other. This document The application examples do not limit this.
  • the number of transmissions frequency division multiplexed with the n-th transmission in the n-th COT can be understood as: the time-frequency resources occupied by M transmissions in the n-th COT and the time-frequency resources occupied by the n-th transmission If the frequency resource is frequency division multiplexed, the number of transmissions in the nth COT that are frequency division multiplexed with the nth transmission is M.
  • a transmission indicates that the sender and receiver of a message are determined.
  • a transmission corresponds to a source ID (source ID) and a destination ID (destination ID).
  • source ID source ID
  • destination ID destination ID
  • the transmission from UE2 to UE4 as shown in Figure 5 indicates that the sending end of the transmission is UE2 and the receiving end is UE4.
  • a terminal device can send multiple transmissions, that is to say, a terminal device can send data to multiple terminal devices at the same time.
  • UE1 can send the first transmission and the second transmission, and the first transmission
  • the sender of the data can be UE1, and the receiver of the data can be UE8.
  • the source identifier of the first transmission is the identifier of UE2, and the destination identifier is the identifier of UE8; the sender of the second transmitted data can be UE1. , the receiving end of the data can be UE9. At this time, the source identifier of the second transmission is UE2 and the destination identifier is UE9.
  • At least two transmissions among the N transmissions may be the same transmission. That is to say, if N terminal devices allocate at least two time-frequency resources for one transmission, the first terminal device needs to be in at least two Determine the time-frequency resource for the transmission among the time-frequency resources, which is specifically described in S420.
  • N transmissions are the same transmission, that is to say, N terminal devices have allocated N time-frequency resources for the same transmission.
  • a terminal device needs to determine the time-frequency resource for the transmission among N time-frequency resources.
  • any two transmissions among the N transmissions may be different. That is to say, the first terminal device needs to determine which transmissions need to be performed in which time-frequency resources among the N time-frequency resources allocated for the N transmissions. Specifically, Description is made at S420.
  • the first terminal device determines to transmit at least one of the N transmissions on at least one time-frequency resource among the N time-frequency resources according to the number of transmissions frequency division multiplexed with the n-th transmission in the n-th COT. .
  • At least one time-frequency resource corresponds to at least one transmission, that is, at least one time-frequency resource is determined among the N time-frequency resources, and the at least one time-frequency resource corresponding to the at least one time-frequency resource is performed on the at least one time-frequency resource.
  • At least one transfer that is to say, the first indication information is used to indicate the n-th transmission of the first terminal device and the n-th transmission using the n-th time-frequency resource in the n-th COT. That is to say, the first indication information indicates the n-th time-frequency resource in the n-th COT. transmission and the n-th time-frequency resource corresponding to the n-th transmission.
  • the first terminal device determines to transmit the first transmission corresponding to the first time-frequency resource on the first time-frequency resource, and to transmit the n-th time-frequency resource on the second time-frequency resource.
  • the second transmission corresponding to the two time-frequency resources is deduced in sequence, that is, the first terminal device determines to transmit one transmission on one time-frequency resource.
  • At least one transmission is a transmission with a lower number of transmissions frequency-division multiplexed with the nth transmission in the nth COT among N transmissions, and n is taken as 1, 2, ..., N. That is, the number of transmissions frequency-division multiplexed with the first transmission in the first COT is the first number (the first number is determined according to the method in S410), the number of transmissions frequency-division multiplexed with the second transmission in the second COT is the second number (the second number is determined according to the method in S410), ..., the number of transmissions frequency-division multiplexed with the Nth transmission in the Nth COT is the Nth number (the Nth number is determined according to the method in S410).
  • the first terminal device determines to transmit the first transmission on the first time-frequency resource and the second transmission on the second time-frequency resource; if the first number, the second number, ..., The lowest number among the Nth numbers is the first number, then the first terminal device determines to transmit the first transmission on the first time-frequency resource.
  • the first terminal device is UE1
  • UE1 determines that the number of transmissions frequency-division multiplexed with UE1's first transmission in the first COT is 1
  • UE1 determines that the number of transmissions frequency-division multiplexed with UE1's second transmission in the second COT is 0, then the first terminal device determines to transmit the second transmission on the second time-frequency resource.
  • the first terminal device will try not to transmit a transmission with a higher number of transmissions frequency-division multiplexed with the nth transmission, and will try to transmit a transmission with a lower number of transmissions frequency-division multiplexed with the nth transmission, thereby improving the continuity of the nth COT and avoiding interruption of the nth COT, so that other time-frequency resources in the nth COT can be shared with other terminal devices, thereby increasing the probability of other terminal devices accessing the channel.
  • the number of frequency division multiplexing transmissions in the first COT and the first transmission is the first number
  • the number of frequency division multiplexing transmissions in the second COT and the second transmission is the second number. If the number of frequency division multiplexing transmissions in the second COT is the second number, if The first quantity is equal to the second quantity, but the first transmission is different from the second transmission.
  • the first terminal device needs to determine the packet priorities of the first transmission and the second transmission, and transmit the packet with a higher priority. Identified as at least one transfer. If the first quantity is the same as the second quantity, and the first transmission and the second transmission are the same transmission, the first terminal device can transmit the first transmission on the first time-frequency resource or the second time-frequency resource. transmission.
  • the same transmission can be performed on any one of the two time-frequency resources of the two transmissions.
  • n passes through 1, 2,...,N, S420, including: the first terminal device determines the priority of the n-th transmission , determining to transmit at least one of the N transmissions on at least one time-frequency resource among the N time-frequency resources.
  • the first terminal device determines to transmit at least one of the N transmissions on at least one of the N time-frequency resources according to the priority of the n-th transmission, including: the first terminal device transmits at least one of the N transmissions on the N time-frequency resources. Determine at least one transmission with a higher priority among the transmissions.
  • the first terminal device tries its best not to transmit low-priority transmissions and transmits high-priority transmissions as much as possible, thereby improving the continuity of the n-th COT and avoiding interruption of the n-th COT, thereby making the n-th COT
  • Other time-frequency resources can be shared with other terminal devices to increase the probability of other terminal devices accessing the channel.
  • the first terminal device determines to transmit at least one of the N transmissions on at least one time-frequency resource among the N time-frequency resources according to the priority of the n-th transmission, including: if there is The priority of the two transmissions is the same, and the two transmissions are different transmissions, then the transmission with the higher priority of the transmission packet can be determined; or, if there are two transmissions with the same priority among the N transmissions, but these two transmissions For the same transmission, the same transmission can be performed on any one of the two time-frequency resources of the two transmissions.
  • S420 is an optional step, that is, the first terminal device can determine at least one transmission, and the first terminal device can perform the first transmission among the N transmissions on the first time-frequency resource.
  • the first time-frequency resource is the time-frequency resource in the first COT of N COTs.
  • the number of transmissions frequency division multiplexed with the first transmission in the first COT is the number of transmissions frequency division multiplexed with the nth transmission in the nth COT. The lowest number, in other words, the first terminal device determines in which transmissions is not an optional step, the first terminal device can directly perform the first transmission.
  • the first terminal device performs the first transmission in at least one transmission on the first time-frequency resource in the at least one time-frequency resource.
  • the number of transmissions frequency division multiplexed with the first transmission in the first COT is the n-th COT.
  • the first time-frequency resource is located in the first COT among the smallest number of transmissions frequency division multiplexed with the n-th transmission.
  • the first transmission is any one of at least one transmission.
  • the number of frequency division multiplexing transmissions in the first COT and the first transmission is the first number
  • the number of frequency division multiplexing transmissions in the second COT and the second transmission is the first number
  • the number of frequency division multiplexing transmissions in the Nth COT is the second number,...
  • the number of frequency division multiplexing transmissions in the Nth COT is the Nth number. If the 1st quantity, 2nd quantity..., the lowest quantity among the Nth quantity is the 1st quantity and the 2nd quantity, the first transmission can be the 1st transmission, or it can also be the 2nd transmission .
  • At least one transmission determined in S420 is the first transmission, that is to say, the transmission determined in S420 is one transmission. That is to say, if the first terminal device determines multiple transmissions among the N transmissions in S420, the first transmission is one of the multiple transmissions. If the first terminal device determines among the N transmissions in S420, If a transmission is received, the first transmission in S430 is the transmission determined in S420.
  • the first terminal device needs to perform channel listening in front of the time-frequency resource corresponding to at least one transmission through the second type LBT, and determines that the channel is idle, and then S430 can be executed.
  • the first indication information included in the n-th message indicates that the n-th transmission of the first terminal device uses the n-th time-frequency resource in the n-th COT
  • a total of N messages may indicate that the n-th transmission of the first terminal device uses the n-th time-frequency resource in the n-th COT.
  • N transmissions of a terminal device use N time-frequency resources in the first time slot.
  • the first terminal device needs to determine the number of frequency division multiplexing transmissions with the n-th transmission (the n-th number) in the first time slot. At least one transmission among the N transmissions to be performed in order to prevent the first terminal device from not knowing which transmission or transmissions to perform among the N transmissions.
  • the method 400 includes: the first terminal device receives a first message, the first message includes fourth indication information, and the fourth indication information is used to instruct the first terminal device to use the second time in the second COT for the second transmission.
  • frequency resource the second time-frequency resource belongs to the second time slot, the first time slot is different from the second time slot, and the first transmission and the second transmission are the same transmission.
  • the first terminal device sends first sidelink control information associated with the first transmission, the first sidelink control information indicates a first time-frequency resource and a second time-frequency resource; on the second time-frequency resource Perform said second transmission.
  • the first terminal device may receive the first message from the third terminal device, and the N terminal devices may or may not include the third terminal device, which is not limited in this embodiment of the present application.
  • the first terminal device may also send a second SCI associated with the second transmission.
  • the second SCI indicates the first time-frequency resource and the second time-frequency resource.
  • the first transmission and the second transmission are the same transmission, that is, That is to say, if two time-frequency resources of two time slots are allocated for a transmission of the first terminal equipment, when the first terminal equipment performs the first transmission, the first sidelink control information associated with the transmission ( Sidelink control information (SCI) can indicate these two time-frequency resources, so that the receiving end of the first transmission can jointly demodulate the transmission on these two time-frequency resources based on the first SCI, thereby improving the transmission and demodulation performance.
  • Sidelink control information SCI
  • the first terminal device determines the first time-frequency resource in the first COT to perform the first transmission. At this time, the first time-frequency resource is the first time-frequency resource.
  • the time-frequency resource Located in the 2nd time slot.
  • the first terminal device also receives the first message from UE4 (the third terminal device may be UE4 at this time).
  • the fourth indication information in the first message indicates that the first transmission of UE1 uses the second time-frequency resource.
  • the resource is located in the 3rd time slot. That is to say, UE1 receives the first message from UE2 indicating that the first transmission uses the first time-frequency resource located in the 2nd time slot, and UE1 receives the first message from UE4 indicating that the first transmission uses the 3rd time slot.
  • the second time-frequency resource of the time slot is located in the 3rd time slot.
  • the SCI associated with the first transmission sent by UE1 to UE8 indicates the first time-frequency resource and the second time-frequency resource, so that UE8 can use the first time-frequency resource indicated by the SCI frequency resources and the second time-frequency resource to jointly demodulate the first transmission.
  • the first terminal device may be multiplexed according to the nth transmission frequency division with the first terminal device.
  • the number of transmissions used is used to determine at least one transmission on at least one time-frequency resource among the N time-frequency resources, thereby providing a method for the first terminal device to determine the transmission.
  • the first terminal device can perform the transmission on the first time-frequency resource.
  • the first transmission is performed on the time-frequency resource, and the number of transmissions frequency division multiplexed with the first transmission in the first COT is the smallest number among the number of transmissions frequency division multiplexed with the nth transmission in the n-th COT, so that Avoid interruption of the nth COT, so that other time-frequency resources in the nth COT can be shared with other terminal devices, improving the probability of other terminal devices accessing the channel.
  • the two terminal devices can share the overlapping time-frequency resources to the two terminal devices at the same time, which will lead to overlapping time-frequency resources.
  • conflicts are prone to occur on frequency resources, which may cause transmission failure of one of the terminal devices.
  • the first terminal device may not share overlapping time-frequency resources, and the second terminal device may share overlapping time-frequency resources.
  • Method 400 and method 800 may be independent embodiments, so the same Nouns in method 400 and method 800 can mean different things.
  • the first terminal device in method 400 is different from that in method 800
  • the first SCI in method 400 is different from the first SCI in method 800
  • the first COT in method 400 is different from the first COT in method 800
  • the second COT in method 400 is different from that in method 800.
  • the first time-frequency resource in method 400 is different from that in method 800.
  • the second time-frequency resource in method 400 is different from that in method 800.
  • the communication method 800 is described below in conjunction with Figure 8. As shown in Figure 8, the method 800 includes:
  • the first terminal device seizes the first COT for the first transmission.
  • the first terminal device is a terminal device of an initial first COT, that is, the first terminal device needs to perform a first transmission, then the first terminal device needs to seize a COT for the first transmission, and the seized COT is the first COT.
  • the first terminal device may determine the channel access priority class according to the first transmission channel access priority class.
  • the maximum time occupied by the first COT in the time domain is obtained by using the CAPC of the first transmission.
  • the CAPC of the first transmission is 2
  • the first terminal device determines that the length of the first COT in the time domain is 4ms
  • the first time slot of the first transmission is the time domain starting position of the first COT
  • the channel accessed by the first terminal device is the frequency domain width of the first COT.
  • CAPC in Table 1 is 3 or 4
  • the length of COT is 10ms, otherwise it is 6ms.
  • the second SCI associated with the first transmission is information indicating the time-frequency resource occupied by the first transmission for the first time. That is to say, the first transmission is a non-periodic transmission by the first terminal device, or the first transmission in the periodic transmission. In other words, the second SCI is the first SCI of the periodic transmission. That is to say, in Before S810, other terminal devices (such as the second terminal device) cannot obtain the information about the first transmission of the first terminal device.
  • the second SCI associated with the first transmission is information indicating the time-frequency resources occupied by the first transmission for a non-first time. That is to say, the first transmission is one of the periodic transmissions and is not the first terminal. The first transmission in the device's periodic transmissions. In other words, the second SCI is not the first SCI transmitted in this period. In this way, other terminal equipment (such as the second terminal equipment) can learn the first terminal equipment based on the third SCI associated with the periodic transmission before the first transmission.
  • the first COT preempted by the first terminal device is determined based on the time-frequency resources occupied by the first transmission and the CAPC of the first transmission.
  • other terminal devices can learn the maximum time occupied by the first COT in the time domain according to the third SCI.
  • other terminal devices may learn the maximum time occupied by the first COT in the time domain according to the CAPC of the first transmission indicated by the third SCI.
  • the third SCI indicates that the CAPC of the first transmission is 2
  • other terminal devices determine that the length of the first COT in the time domain is 4ms
  • the time slot in which the first transmission is located is the first COT.
  • the frequency domain width of the first COT is the LBT channel or RB set where the first transmitted frequency domain resource is located.
  • S820 The first terminal device receives the first message, and the first message indicates that the second terminal device seizes the second COT for the second transmission.
  • the first terminal device may receive the first message from the second terminal device.
  • the second transmission of the second terminal device is a non-first transmission in a periodic transmission.
  • the second terminal device may have sent the first message before S810. Due to the periodicity of the transmission, the first terminal device may learn the upcoming second transmission preemption of the second terminal device in the periodic transmission based on the first message.
  • the second COT is obtained, that is to say, the first terminal device can learn the second COT that the second terminal device will preempt for the second transmission in a future cycle based on the periodic characteristics of the second terminal device's transmission.
  • the first message includes the first SCI.
  • the first SCI may indicate the priority of the second transmission.
  • the first SCI may indicate the packet priority (proSe per-packet priority, PPPP) of the second transmission.
  • the first SCI may indicate a channel access priority class (CAPC) of the second transmission.
  • CAC channel access priority class
  • the first terminal device may determine the maximum time occupied by the second COT in the time domain according to the CAPC of the second transmission indicated by the first SCI.
  • the first SCI indicates the CAPC of the second transmission.
  • CAPC is 2
  • the first terminal equipment determines that the length of the second COT in the time domain is 4ms
  • the time slot in which the second transmission is located is the first time slot of the second COT
  • the frequency domain width of the second COT is the second The LBT channel or RB set where the transmitted frequency domain resources are located. That is to say, the first terminal device can determine that the second terminal device has preempted the second COT according to the first SCI.
  • the first SCI may indicate the packet priority and channel access priority of the second transmission.
  • S810 can be performed before, after or at the same time as S820.
  • the first terminal device shares the first time-frequency resource in the first COT.
  • the first time-frequency resource does not include the second time-frequency resource.
  • the second time-frequency resource is an overlapping resource between the first COT and the second COT.
  • S830 may include: the first terminal device sends COT sharing information, and the COT sharing information is used to share the time-frequency resources in the first COT with other terminal devices, but the first terminal device does not share the time-frequency resources in the first COT that overlap with the second COT.
  • the first COT overlaps with the second COT in the frequency domain, so the first terminal device does not share the second time-frequency resources in the first COT that overlap with the second terminal device.
  • the first COT overlaps with the second COT in the third time slot in the time domain, so the first terminal device does not share the time-frequency resources in the third time slot in the first COT.
  • the packet priority of the first transmission is lower than the packet priority of the second transmission, that is, if the packet priority of the first transmission is low
  • S830 may be executed.
  • the channel access priority of the first transmission is lower than the channel access priority of the second transmission, that is, if the channel access priority of the first transmission If the channel access priority is lower than the channel access priority of the second transmission, S830 may be executed.
  • the channel access priority of the first transmission is lower than the channel access priority of the second transmission, also That is to say, if the channel access priority of the first transmission is lower than the channel access priority of the second transmission, S830 may be performed.
  • the packet priority of the first transmission is lower than the packet priority of the second transmission, that is, if If the packet priority of the first transmission is lower than the packet priority of the second transmission, S830 can be executed.
  • the packet priority of the first transmission is equal to the packet priority of the second transmission
  • the channel access priority of the first transmission is equal to the packet priority of the second transmission.
  • the incoming priority is lower than the channel access priority of the second transmission. That is to say, when the packet priority of the first transmission is equal to the packet priority of the second transmission, you can continue to compare the channel access priorities. If the If the channel access priority of one transmission is lower than the channel access priority of the second transmission, S830 may be performed.
  • the first SCI can indicate the channel access priority of the second transmission and the packet priority of the second transmission
  • the channel access priority of the first transmission is equal to the channel access priority of the second transmission
  • the first The packet priority of the transmission is lower than the packet priority of the second transmission. That is to say, when the channel access priority of the first transmission is equal to the channel access priority of the second transmission, the packet priority can continue to be compared. level, if the packet priority of the first transmission is lower than the packet priority of the second transmission, S830 may be executed.
  • the first terminal device may serve as an avoidance terminal device and not allocate time-frequency resources in the first COT that overlap with the second COT.
  • the overlapping resources are released for the second terminal device to be shared by the second terminal device with other terminal devices.
  • the second terminal device For the second terminal device corresponding to the above method 800, if the second SCI associated with the first transmission is information indicating the time-frequency resource occupied by the first transmission for a non-first time, that is to say, the first transmission is a periodic transmission and It is not the first transmission in a periodic transmission of the first terminal device. In other words, the second SCI is not the first SCI transmitted in this period. In this way, the second terminal device can associate it according to the periodic transmission before the first transmission.
  • the third SCI learns the first COT preempted by the first transmission of the first terminal device
  • the second terminal device learns the first COT preempted by the first terminal device for the first transmission according to the third SCI and the first terminal device according to the first
  • the SCI learns that the second COT preempted by the second terminal device for the second transmission is similar, and will not be described in detail to avoid redundancy.
  • the method 1100 executed by the second terminal device is described below in conjunction with the method 1100 in Figure 11. As shown in Figure 11, the method 1100 includes:
  • the second terminal device receives the third SCI.
  • the third SCI indicates the first COT that the first terminal device preempts for the first transmission and the priority of the first transmission.
  • the third SCI may be an SCI associated with a transmission before the first transmission of the first terminal device, where the first transmission and the transmission before the first transmission are two transmissions in one cycle.
  • S1110 includes: the second terminal device may receive the third SCI from the first terminal device.
  • the third SCI indicates the packet priority of the first transmission.
  • the third SCI indicates the channel access priority of the first transmission.
  • the third SCI indicates the packet priority of the first transmission and the channel access priority of the first transmission.
  • the second terminal device seizes the second COT for the second transmission of the second terminal device.
  • the second terminal device is the terminal device of the initial second COT. That is to say, the second terminal device needs to perform the second transmission, then the second terminal device needs to seize a COT for the second transmission, and the preempted COT is Second COT.
  • S1120 and S1110 can be performed before, after, or simultaneously with S1120.
  • the second terminal device shares the third time-frequency resource.
  • the third time-frequency resource includes the second time-frequency resource.
  • the second time-frequency resource is the resource where the first COT and the second COT overlap.
  • the priority of the second transmission is Priority higher than the first transfer.
  • S1130 may include: the second terminal device sends COT sharing information, and the COT sharing information is used to share information with other terminals.
  • the devices share the time-frequency resources in the second COT, and the second terminal device can also share the time-frequency resources in the first COT that overlap with the second COT.
  • the first COT and the second COT overlap in the frequency domain. Therefore, the second terminal device can share the second time-frequency resource in the first COT that overlaps with the second terminal device.
  • the first COT and the second COT overlap in the third time slot of the time domain. Therefore, the second terminal device can share the time frequency in the third time slot of the first COT. resource.
  • the third SCI can indicate the packet priority of the first transmission; the priority of the second transmission is higher than the priority of the first transmission, specifically: the packet priority of the second transmission is higher than the packet priority of the second transmission.
  • S1130 may be executed.
  • the priority of the second transmission is higher than the priority of the first transmission.
  • the channel access priority of the second transmission is higher than the priority of the first transmission.
  • the channel access priority of the transmission that is, if the channel access priority of the second transmission is higher than the channel access priority of the second transmission, S1130 may be performed.
  • the third SCI can indicate the channel access priority of the first transmission and the packet priority of the first transmission; the priority of the second transmission is higher than the priority of the first transmission, specifically: the channel of the second transmission.
  • the access priority is higher than the channel access priority of the first transmission, that is, if the channel access priority of the second transmission is higher than the channel access priority of the first transmission, S1130 may be performed.
  • the third SCI can indicate the channel access priority of the first transmission and the packet priority of the first transmission; the priority of the second transmission is higher than the priority of the first transmission, specifically: the packet of the second transmission The priority is higher than the packet priority of the first transmission, that is, if the packet priority of the second transmission is higher than the packet priority of the first transmission, S1130 may be executed.
  • the third SCI can indicate the channel access priority of the first transmission and the packet priority of the first transmission; the priority of the second transmission is higher than the priority of the first transmission, specifically: the packet of the second transmission The priority is equal to the packet priority of the first transmission, and the channel access priority of the second transmission is higher than the channel access priority of the first transmission, that is, the packet priority of the second transmission is equal to the packet priority of the first transmission.
  • the channel access priorities can continue to be compared. If the channel access priority of the second transmission is higher than the channel access priority of the first transmission, S1130 can be executed.
  • the third SCI can indicate the channel access priority of the first transmission and the packet priority of the first transmission; the priority of the second transmission is higher than the priority of the first transmission, specifically: the channel of the second transmission.
  • the access priority is equal to the channel access priority of the first transmission, and the packet priority of the second transmission is higher than the packet priority of the first transmission. That is to say, the channel access priority of the second transmission is equal to the first transmission.
  • the packet priorities can continue to be compared. If the packet priority of the second transmission is higher than the packet priority of the second transmission, S1130 can be executed.
  • the second terminal device can compare the priority of the first transmission and the priority of the second transmission. If the priority of the second transmission is higher than the priority of the first transmission, the second terminal device can first COT time-frequency resources that overlap with the second COT.
  • the nth message does not limit the time order.
  • the first message is not limited in time to be before the second message.
  • the first message among N messages represents one message among the N messages.
  • the second message among N messages represents another message among N messages; for another example, the first transmission among N transmissions represents one transmission among N transmissions, and the second transmission among N transmissions represents Another transfer among N transfers.
  • the nth one can be replaced with the nth one.
  • the nth message can be replaced with the nth message
  • the nth transmission can be replaced with the nth transmission
  • the nth time-frequency resource can be replaced with the nth time-frequency resource. .
  • n-th mentioned in the embodiment of this application means that n is taken from 1, 2,...,N, that is, the 1st, 2nd,..., and Nth.
  • FIG. 12 shows a communication device 1200 provided by an embodiment of the present application.
  • the communication device 1200 includes a processor 1210 and a transceiver 1220.
  • the processor 1210 and the transceiver 1220 communicate with each other through an internal connection path, and the processor 1210 is used to execute instructions to control the transceiver 1220 to send signals and/or receive signals.
  • the communication device 1200 may also include a memory 1230, which communicates with the processor 1210 and the transceiver 1220 through internal connection paths.
  • the memory 1230 is used to store instructions, and the processor 1210 can execute the instructions stored in the memory 1230 .
  • the communication device 1200 is used to implement various processes and steps corresponding to the first terminal device in the above method 400.
  • the communication device 1200 is used to implement various processes and steps corresponding to the first terminal device in the above method 800.
  • the communication device 1200 is used to implement various processes and steps corresponding to the second terminal device in the above method 1100.
  • the communication device 1200 may be specifically the first terminal device in the above method 400 or the first terminal device in the method 800 or the second terminal device in the method 1100, or may be a chip or a chip system.
  • the transceiver 1220 may be the transceiver circuit of the chip, which is not limited here.
  • the communication device 1200 can be used to perform various steps corresponding to the first terminal device in the method 400 or the first terminal device in the method 800 or the second terminal device in the method 1100 in the above method embodiment and/or process.
  • the memory 1230 may include read-only memory and random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory.
  • the memory may also store device type information.
  • the processor 1210 may be used to execute instructions stored in the memory, and when the processor 1210 executes the instructions stored in the memory, the processor 1210 is used to execute the first terminal device in the above method 400 or the first terminal device in the method 800. Various steps and/or processes of a terminal device or a second terminal device in the method 1100.
  • each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware processor for execution, or can be executed by a combination of hardware and software modules in the processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities.
  • each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software.
  • the above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • the methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.
  • the steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined and performed.
  • the software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • RAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer program product, which includes: a computer program code, when the computer program code is run on a computer, the computer executes each step or process executed by the first terminal device in the above method 400 or the first terminal device in the method 800 or the second terminal device in the method 1100.
  • the present application also provides a computer-readable storage medium, the computer-readable storage medium
  • the medium stores program code.
  • the program code When the program code is run on a computer, it causes the computer to execute the first terminal device in method 400 or the first terminal device in method 800 or the second terminal in method 1100 in the above method embodiment. The individual steps or processes performed by the device.
  • the present application also provides a communication system, which includes one or more first terminal devices and N terminal devices in the method 400, or includes one or more first terminals in the method 800.
  • a communication system which includes one or more first terminal devices and N terminal devices in the method 400, or includes one or more first terminals in the method 800.
  • the corresponding modules or units perform corresponding steps.
  • the communication unit transmits the steps of receiving or sending in the method embodiments. Except for sending and receiving, Other steps may be performed by the processing unit (processor).
  • the functions of specific units may be based on corresponding method embodiments.
  • instruction may include direct instruction and indirect instruction, as well as explicit instruction and implicit instruction.
  • the information indicated by a certain information is called information to be indicated.
  • the information to be indicated can be directly indicated, such as indicating the information to be indicated itself. Or the index of the information to be indicated, etc.
  • the information to be indicated may also be indirectly indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance.
  • the indication of specific information can also be achieved by means of a pre-agreed (for example, protocol stipulated) arrangement order of each piece of information, thereby reducing the indication overhead to a certain extent.
  • 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.
  • each functional unit may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions (programs). When the computer program instructions (program) are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or contain a Or data storage devices such as servers and data centers integrated with multiple available media.
  • the available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, solid state disk (SSD)), etc.
  • 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

La présente demande se rapporte au domaine des communications. Sont prévus un procédé de communication et un appareil de communication Le procédé de communication consiste à : recevoir N messages, le nème message comprenant des premières informations d'indication, lesquelles premières informations d'indication sont utilisées pour indiquer qu'une nème transmission d'un premier dispositif terminal utilise une nème ressource temps-fréquence dans un nème temps d'occupation de canal (COT), où N = 1, 2,..., N, et N ressources temps-fréquence appartiennent à un premier créneau, N étant un nombre entier positif supérieur ou égal à 2 ; et en fonction du nombre de transmissions multiplexées par répartition en fréquence avec la nème transmission dans le nème COT, déterminer de transmettre au moins une transmission parmi N transmissions sur au moins l'une des N ressources temps-fréquence. Selon le procédé, lorsqu'un premier dispositif terminal détermine d'effectuer une transmission sur un premier créneau, le nombre de transmissions multiplexées par répartition en fréquence avec la nème transmission est pris en considération, et le fait qu'il ne soit pas possible pour le premier dispositif terminal de déterminer quelles ressources dans N ressources temps-fréquence sont utilisées pour la transmission est évité.
PCT/CN2023/119149 2022-09-20 2023-09-15 Procédé de communication et appareil de communication WO2024061130A1 (fr)

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CN202211140236 2022-09-20
CN202211140236.6 2022-09-20
CN202211217066.7 2022-09-30
CN202211217066.7A CN117750517A (zh) 2022-09-20 2022-09-30 通信方法和通信装置

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