WO2023274012A1 - 侧行链路反馈信息传输的方法和通信装置 - Google Patents

侧行链路反馈信息传输的方法和通信装置 Download PDF

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Publication number
WO2023274012A1
WO2023274012A1 PCT/CN2022/100715 CN2022100715W WO2023274012A1 WO 2023274012 A1 WO2023274012 A1 WO 2023274012A1 CN 2022100715 W CN2022100715 W CN 2022100715W WO 2023274012 A1 WO2023274012 A1 WO 2023274012A1
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terminal
psfch resource
psfch
resource
data
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PCT/CN2022/100715
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English (en)
French (fr)
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董蕾
苏宏家
郭文婷
卢磊
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华为技术有限公司
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Priority to EP22831828.3A priority Critical patent/EP4351055A1/en
Publication of WO2023274012A1 publication Critical patent/WO2023274012A1/zh
Priority to US18/397,112 priority patent/US20240137929A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present application relates to the field of communication, and, more particularly, to a method and a communication device for transmitting sidelink feedback information.
  • LTE long term evolution
  • LAA licensed assisted access
  • MulteFire multi-LTE fire
  • 3rd generation partnership project 3rd generation partnership project, 3GPP
  • LBT listen-before-talk
  • Wi-Fi wireless communication technology
  • the user equipment In addition to the Uu interface, the user equipment (user equipment, UE) also has a PC5 interface during the communication process.
  • the PC5 interface is a communication interface between UEs, and the transmission link in the PC5 interface is defined as a sidelink ( sidelink, SL).
  • SL sidelink
  • Enabling SL communication in unlicensed frequency bands in the local space is an important evolution direction, and the corresponding protocol technologies can be collectively referred to as SL-U. Similar to NR-U, UEs working through SL-U also need to coexist with nearby Wi-Fi devices based on the LBT mechanism.
  • the current standard discusses the integration of the communication of the Uu interface and the LBT mechanism, but does not involve the integration of the communication of the PC5 interface and the LBT mechanism. How to use the PC5 interface to communicate in the unlicensed frequency band based on the LBT mechanism is an urgent problem to be solved.
  • the present application provides a method and device for transmitting sidelink feedback information, which can reduce the possibility of a receiving terminal failing to compete for resources and improve the accuracy of data transmission.
  • a method for transmitting sidelink feedback information is provided.
  • the method may be executed by the first terminal, or may also be executed by a chip or a circuit configured in the first terminal, which is not limited in the present application.
  • the method includes: the first terminal sends first indication information to the second terminal, the first indication information indicates that the first channel occupancy time includes a first physical layer side link feedback channel PSFCH resource, and the first terminal uses the first PSFCH resource Feedback information from the second terminal is received.
  • the first terminal sends first indication information to the second terminal, where the first indication information indicates the resource corresponding to the first channel occupation time, and the first terminal receives the feedback from the second terminal at the resource corresponding to the first channel occupation time information.
  • the resource corresponding to the first channel occupation time or the first channel occupation time includes the first PSFCH resource Indicate to the second terminal (data receiving end), so that the second terminal sends feedback information on the resource corresponding to the indicated first channel occupancy time, or on the first PSFCH resource determined by a predefined rule.
  • this solution can reduce the possibility of the second terminal failing to compete and improve the accuracy of data transmission.
  • the first terminal receives the first hybrid automatic repeat request (HARQ) information from the second terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first data is the first Data sent by a terminal to a second terminal within a second channel occupation time, where the first channel occupation time is after the second channel occupation time.
  • HARQ hybrid automatic repeat request
  • the first terminal can seize the resource corresponding to the first channel occupancy time through the LBT mechanism, and use it to transmit the HARQ information corresponding to the data that has not fed back the HARQ information within the second channel occupancy time before, so that in the second channel occupancy time Data that is too late to feed back HARQ information within the channel occupation time can be fed back, preventing the first terminal from retransmitting data because it cannot receive the feedback information, and adopting this solution can save resources to a certain extent.
  • the first terminal receives first HARQ information and second HARQ information from the second terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first data is the first The data sent by the terminal to the second terminal within the second channel occupation time, the second HARQ information is feedback to the second data, and the second data is the data sent by the first terminal to the second terminal within the first channel occupation time.
  • the first terminal may seize the resource corresponding to the first channel occupation time through the LBT mechanism, and use it for transmitting data and feedback information. It should be understood that in this solution, the first terminal preempts resources for data transmission, and at the same time, the first terminal can receive HARQ information corresponding to data that has not fed back HARQ information within the second channel occupancy time on the preempted resources, making up for In some scenarios, the data within the second channel occupation time has no feedback defect, and the feedback mechanism of the data transmission process is improved.
  • the first terminal sends second indication information to the second terminal, where the second indication information indicates information of the first data corresponding to the first HARQ information.
  • the information of the first data includes a first PSSCH source identifier and/or a destination identifier.
  • the first terminal when the multiple data sent by the first terminal to multiple receiving terminals are not fed back, the first terminal sends specific information of the data for which no HARQ information is fed back to the receiving terminal, so that the second terminal can identify the data based on the specific information Output the data that needs to be fed back, so as to accurately feed back the HARQ information.
  • the time domain resource of the first PSFCH resource is determined based on an index of a start time unit of the first PSFCH resource and/or the number of time units occupied by the first PSFCH resource.
  • the time domain resource of the first PSFCH resource can be determined based on a predefined or preconfigured manner, which saves signaling overhead to a certain extent.
  • the first terminal sends third indication information to the second terminal, and the third indication information indicates the index of the starting time unit of the first PSFCH resource and/or the number of time units occupied by the first PSFCH resource .
  • the time domain resource of the first PSFCH resource is determined through indication information, and this manner is more flexible than the predefined or preconfigured manner.
  • the frequency domain resource of the first PSFCH resource is determined based on the index of the starting frequency domain unit of the first PSFCH resource and/or the number of frequency domain units occupied by the first PSFCH resource.
  • the frequency domain resource of the first PSFCH resource can be determined based on a predefined or preconfigured manner, which saves signaling overhead to a certain extent.
  • the first terminal sends fourth indication information to the second terminal, where the fourth indication information indicates the index of the starting frequency domain unit of the first PSFCH resource and/or the index of the frequency domain unit occupied by the first PSFCH resource number.
  • the frequency domain resource of the first PSFCH resource is determined through indication information, and this manner is more flexible than the predefined or preconfigured manner.
  • the frequency domain resource of the first PSFCH resource is determined based on a time domain position where the first data is located within the second channel occupation time.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit included in the time unit where the first PSFCH resource is located.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit where the PSFCH resource in the PSFCH resource set is located
  • the PSFCH resource set is the PSFCH resource on the time unit where the first PSFCH resource is located
  • the set of PSFCH resources in the PSFCH resource set, the frequency domain resources of the PSFCH resources in the PSFCH resource set are based on the bitmap, at least one of the starting PSFCH resource of the PSFCH resource set and the interval is determined, and the interval is the frequency domain unit between adjacent PSFCH resources in the PSFCH resource set interval.
  • the above bitmap, the starting PSFCH resource of the PSFCH resource set, and the interval may be determined by means of predefinition, preconfiguration, or network device configuration.
  • At least one of the first indication information, the second indication information, the third indication information and the fourth indication information is carried in the side link control information SCI, and the SCI is transmitted within the first channel occupation time .
  • a method for transmitting sidelink feedback information is provided.
  • the method may be executed by the second terminal, or may also be executed by a chip or a circuit configured in the second terminal, which is not limited in the present application.
  • the method includes: the second terminal receives first indication information from the first terminal, the first indication information indicates that the first channel occupation time includes the first PSFCH resource, and the second terminal sends feedback information to the first terminal on the first PSFCH resource.
  • the second terminal receives first indication information from the first terminal, where the first indication information indicates resources corresponding to the first channel occupation time, and the second terminal sends feedback information to the first terminal at the resources corresponding to the first channel occupation time.
  • the resource corresponding to the first channel occupation time or the first channel occupation time includes the first PSFCH resource Indicate to the second terminal (data receiving end), so that the second terminal sends feedback information on the resource corresponding to the indicated first channel occupancy time, or on the first PSFCH resource determined by a predefined rule.
  • this solution can reduce the possibility of the second terminal failing to compete and improve the accuracy of data transmission.
  • the second terminal sends the first HARQ information to the first terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first data is the occupation time of the second terminal on the second channel For the data received from the first terminal within the period, the first channel occupancy time is later than the second channel occupancy time.
  • the first terminal can seize the resource corresponding to the first channel occupancy time through the LBT mechanism, and use it to transmit the HARQ information corresponding to the data that has not fed back the HARQ information within the second channel occupancy time before, so that in the second channel occupancy time Data that is too late to feed back HARQ information within the channel occupation time can be fed back, preventing the first terminal from retransmitting data because it cannot receive the feedback information, and adopting this solution can save resources to a certain extent.
  • the second terminal sends the first HARQ information and the second HARQ information to the first terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first data is the The data received from the first terminal within the second channel occupation time, the second HARQ information is feedback to the second data, and the second data is the data from the first terminal received by the second terminal within the first channel occupation time data.
  • the first terminal may seize the resource corresponding to the first channel occupation time through the LBT mechanism, and use it for transmitting data and feedback information. It should be understood that in this solution, the first terminal preempts resources for data transmission, and at the same time, the second terminal can send HARQ information corresponding to data that has not fed back HARQ information within the second channel occupancy time on the preempted resources to make up for In some scenarios, the data within the second channel occupation time has no feedback defect, and the feedback mechanism of the data transmission process is improved.
  • the second terminal receives second indication information from the first terminal, and the second indication information indicates information of the first data corresponding to the first HARQ information, and the second terminal receives the second indication information on the first PSFCH according to the second indication information.
  • the resource sends the first HARQ information to the first terminal.
  • the information of the first data includes the PSSCH source identifier and/or the destination identifier
  • the second terminal determines the first data according to the PSSCH source identifier and/or the destination identifier, and sends the first data to the first terminal on the first PSFCH resource First HARQ information corresponding to the first data.
  • the first terminal when the multiple data sent by the first terminal to multiple receiving terminals are not fed back, the first terminal sends specific information of the data for which no HARQ information is fed back to the receiving terminal, so that the second terminal can identify the data based on the specific information Output the data that needs to be fed back, so as to accurately feed back the HARQ information.
  • the time domain resource of the first PSFCH resource is determined based on the index of the starting time unit of the first PSFCH and/or the number of time units occupied by the first PSFCH resource.
  • the time domain resource of the first PSFCH resource can be determined based on a predefined or preconfigured manner, which saves signaling overhead to a certain extent.
  • the second terminal receives third indication information from the first terminal, where the third indication information indicates the index of the starting time unit of the first PSFCH resource and/or the number of time units occupied by the first PSFCH resource number.
  • the time domain resource of the first PSFCH resource is determined through indication information, and this manner is more flexible than the predefined or preconfigured manner.
  • the frequency domain resource of the first PSFCH resource is determined based on the index of the starting frequency domain unit of the first PSFCH resource and/or the number of frequency domain units occupied by the first PSFCH resource.
  • the frequency domain resource of the first PSFCH resource can be determined based on a predefined or preconfigured manner, which saves signaling overhead to a certain extent.
  • the second terminal receives fourth indication information from the first terminal, where the fourth indication information indicates the index of the starting frequency domain unit of the first PSFCH resource and/or the frequency domain unit occupied by the first PSFCH resource the number of .
  • the frequency domain resource of the first PSFCH resource is determined through indication information, and this manner is more flexible than the predefined or preconfigured manner.
  • the frequency domain resource of the first PSFCH resource is determined based on a time domain position where the first data is located within the second channel occupation time.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit included in the time unit where the first PSFCH resource is located.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit where the PSFCH resource in the PSFCH resource set is located
  • the PSFCH resource set is the PSFCH resource on the time unit where the first PSFCH resource is located
  • the set of PSFCH resources in the PSFCH resource set, the frequency domain resources of the PSFCH resources in the PSFCH resource set are based on the bitmap, at least one of the starting PSFCH resource of the PSFCH resource set and the interval is determined, and the interval is the frequency domain unit between adjacent PSFCH resources in the PSFCH resource set interval.
  • the above bitmap, the starting PSFCH resource of the PSFCH resource set, and the interval may be determined by means of predefinition, preconfiguration, or network device configuration.
  • At least one of the first indication information, the second indication information, the third indication information, and the fourth indication information is carried in an SCI, and the SCI is transmitted within the first channel occupation time.
  • a communication device may be the first terminal, or may also be a chip or a circuit configured in the first terminal, which is not limited in this application.
  • the device includes a transceiving unit, the transceiving unit is configured to send first indication information to the second terminal, the first indication information indicates that the first channel occupancy time includes the first physical layer side link feedback channel PSFCH resource, and the transceiving unit also uses To receive feedback information from the second terminal on the first PSFCH resource.
  • the transceiving unit is configured to send first indication information to the second terminal, the first indication information indicating the resource corresponding to the first channel occupation time, and the transceiving unit is further configured to receive the resource corresponding to the first channel occupation time from the second terminal. Feedback information from the second terminal.
  • the resource corresponding to the first channel occupation time or the first channel occupation time includes the first PSFCH resource Indicate to the second terminal (data receiving end), so that the second terminal sends feedback information on the resource corresponding to the indicated first channel occupancy time, or on the first PSFCH resource determined by a predefined rule.
  • this solution can reduce the possibility of the second terminal failing to compete and improve the accuracy of data transmission.
  • the transceiver unit is specifically configured to receive first hybrid automatic repeat request (HARQ) information from the second terminal on the first PSFCH resource, where the first HARQ information is feedback to the first data, and the first The data is data sent by the first terminal to the second terminal within the second channel occupation time, and the first channel occupation time is after the second channel occupation time.
  • HARQ hybrid automatic repeat request
  • the first terminal can seize the resource corresponding to the first channel occupancy time through the LBT mechanism, and use it to transmit the HARQ information corresponding to the data that has not fed back the HARQ information within the second channel occupancy time before, so that in the second channel occupancy time Data that is too late to feed back HARQ information within the channel occupation time can be fed back, preventing the first terminal from retransmitting data because it cannot receive the feedback information, and adopting this solution can save resources to a certain extent.
  • the transceiver unit is specifically configured to receive first HARQ information and second HARQ information from the second terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first data is the data sent by the first terminal to the second terminal within the second channel occupation time, the second HARQ information is the feedback to the second data, and the second data is the data sent by the first terminal to the second terminal within the first channel occupation time .
  • the first terminal may seize the resource corresponding to the first channel occupation time through the LBT mechanism, and use it for transmitting data and feedback information. It should be understood that in this solution, the first terminal preempts resources for data transmission, and at the same time, the first terminal can receive HARQ information corresponding to data that has not fed back HARQ information within the second channel occupancy time on the preempted resources, making up for In some scenarios, the data within the second channel occupation time has no feedback defect, and the feedback mechanism of the data transmission process is improved.
  • the transceiving unit is further configured to send second indication information to the second terminal, where the second indication information indicates information of the first data corresponding to the first HARQ information.
  • the information of the first data includes a first PSSCH source identifier and/or a destination identifier.
  • the apparatus further includes a processing unit configured to determine the first PSFCH resource based on the index of the starting time unit of the first PSFCH resource and/or the number of time units occupied by the first PSFCH resource time-domain resources.
  • the transceiver unit is further configured to send third indication information to the second terminal, where the third indication information indicates the index of the starting time unit of the first PSFCH resource and/or the time unit occupied by the first PSFCH resource the number of .
  • the processing unit is further configured to determine the frequency domain resource of the first PSFCH resource based on the index of the starting frequency domain unit of the first PSFCH resource and/or the number of frequency domain units occupied by the first PSFCH resource .
  • the transceiver unit is further configured to send fourth indication information to the second terminal, where the fourth indication information indicates an index of a starting frequency domain unit of the first PSFCH resource and/or a frequency occupied by the first PSFCH resource.
  • the number of domain units is further configured to send fourth indication information to the second terminal, where the fourth indication information indicates an index of a starting frequency domain unit of the first PSFCH resource and/or a frequency occupied by the first PSFCH resource.
  • the processing unit is further configured to determine a frequency domain resource of the first PSFCH resource based on a time domain position of the first data within the second channel occupation time.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit included in the time unit where the first PSFCH resource is located.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit where the PSFCH resource in the PSFCH resource set is located
  • the PSFCH resource set is the PSFCH resource on the time unit where the first PSFCH resource is located
  • the set of PSFCH resources in the PSFCH resource set, the frequency domain resources of the PSFCH resources in the PSFCH resource set are based on the bitmap, at least one of the starting PSFCH resource of the PSFCH resource set and the interval is determined, and the interval is the frequency domain unit between adjacent PSFCH resources in the PSFCH resource set interval.
  • the above bitmap, the starting PSFCH resource of the PSFCH resource set, and the interval may be determined by means of predefinition, preconfiguration, or network device configuration.
  • At least one of the first indication information, the second indication information, the third indication information and the fourth indication information is carried in the side link control information SCI, and the SCI is transmitted within the first channel occupation time .
  • a communication device may be the second terminal, or may also be a chip or a circuit configured in the second terminal, which is not limited in this application.
  • the device includes a transceiving unit and a processing unit, the transceiving unit is used to receive first indication information from the first terminal, the first indication information indicates that the first channel occupancy time includes the first PSFCH resource, and the transceiving unit is also used to receive the first PSFCH resource in the first The PSFCH resource sends feedback information to the first terminal.
  • the transceiving unit is configured to receive first indication information from the first terminal, where the first indication information indicates resources corresponding to the first channel occupancy time, and the transceiving unit is also configured to send the resource corresponding to the first channel occupancy time to the first The terminal sends feedback information.
  • the resource corresponding to the first channel occupation time or the first channel occupation time includes the first PSFCH resource Indicate to the second terminal (data receiving end), so that the second terminal sends feedback information on the resource corresponding to the indicated first channel occupancy time, or on the first PSFCH resource determined by a predefined rule.
  • this solution can reduce the possibility of the second terminal failing to compete and improve the accuracy of data transmission.
  • the transceiver unit is specifically configured to send first HARQ information to the first terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first data is the second For the data received from the first terminal within the channel occupation time, the first channel occupation time is after the second channel occupation time.
  • the first terminal can seize the resource corresponding to the first channel occupancy time through the LBT mechanism, and use it to transmit the HARQ information corresponding to the data that has not fed back the HARQ information within the second channel occupancy time before, so that in the second channel occupancy time Data that is too late to feed back HARQ information within the channel occupation time can be fed back, preventing the first terminal from retransmitting data because it cannot receive the feedback information, and adopting this solution can save resources to a certain extent.
  • the transceiver unit is specifically configured to send the first HARQ information and the second HARQ information to the first terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first data is the second HARQ information.
  • the data received by the two terminals from the first terminal within the second channel occupation time, the second HARQ information is the feedback to the second data, and the second data is the data from the first terminal received by the second terminal within the first channel occupation time data of a terminal.
  • the first terminal may seize the resource corresponding to the first channel occupation time through the LBT mechanism, and use it for transmitting data and feedback information. It should be understood that in this solution, the first terminal preempts resources for data transmission, and at the same time, the second terminal can send HARQ information corresponding to data that has not fed back HARQ information within the second channel occupancy time on the preempted resources to make up for In some scenarios, the data within the second channel occupation time has no feedback defect, and the feedback mechanism of the data transmission process is improved.
  • the transceiving unit is further configured to receive second indication information from the first terminal, where the second indication information indicates information of the first data corresponding to the first HARQ information, and the processing unit is configured to, according to the second indication, The information controls the transceiving unit to send the first HARQ information to the first terminal on the first PSFCH resource.
  • the information of the first data includes a PSSCH source identifier and/or a destination identifier
  • the processing unit is specifically configured to determine the first data according to the PSSCH source identifier and/or destination identifier, and control the transceiver unit to The PSFCH resource sends the first HARQ information corresponding to the first data to the first terminal.
  • the processing unit is further configured to determine the time domain resource of the first PSFCH resource based on the index of the starting time unit of the first PSFCH and/or the number of time units occupied by the first PSFCH resource.
  • the transceiver unit is further configured to receive third indication information from the first terminal, where the third indication information indicates the index of the start time unit of the first PSFCH resource and/or the time occupied by the first PSFCH resource the number of units.
  • the processing unit is further configured to determine the frequency domain resource of the first PSFCH resource based on the index of the starting frequency domain unit of the first PSFCH resource and/or the number of frequency domain units occupied by the first PSFCH resource .
  • the transceiving unit is further configured to receive fourth indication information from the first terminal, where the fourth indication information indicates the index of the starting frequency domain unit of the first PSFCH resource and/or the number of times occupied by the first PSFCH resource. The number of frequency domain units.
  • the processing unit is further configured to determine a frequency domain resource of the first PSFCH resource based on a time domain position of the first data within the second channel occupation time.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit included in the time unit where the first PSFCH resource is located.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit where the PSFCH resource in the PSFCH resource set is located
  • the PSFCH resource set is the PSFCH resource on the time unit where the first PSFCH resource is located
  • the set of PSFCH resource frequency domain resources in the PSFCH resource set is based on the bitmap, at least one of the initial PSFCH resource and interval of the PSFCH resource set is determined, and the interval is the frequency domain unit between adjacent PSFCH resources in the PSFCH resource set interval.
  • the above bitmap, the starting PSFCH resource of the PSFCH resource set, and the interval may be determined by means of predefinition, preconfiguration, or network device configuration.
  • At least one of the first indication information, the second indication information, the third indication information, and the fourth indication information is carried in an SCI, and the SCI is transmitted within the first channel occupation time.
  • a communication device is provided, and the device may be the first terminal in the above first aspect, or an electronic device configured in the first terminal, or a larger device including the first terminal.
  • the device is used to execute the method provided by the first aspect above.
  • the device includes a transceiver.
  • the device further includes a processor, the processor is coupled to the memory, and can be used to execute instructions in the memory, so as to implement the above first aspect and the method in any possible implementation manner of the first aspect.
  • the device further includes a memory, and the memory and the processor may be deployed separately or in a centralized manner.
  • the device further includes a communication interface, and the processor is coupled to the communication interface.
  • the communication interface may be a transceiver, or an input/output interface.
  • the device is a chip configured in the first terminal.
  • the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system.
  • the processor may also be embodied as a processing circuit or logic circuit.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the above-mentioned processor can be one or more chips
  • the input circuit can be an input pin
  • the output circuit can be an output pin
  • the processing circuit can be a transistor, a gate circuit, a flip-flop and various logic circuits, etc. .
  • the input signal received by the input circuit may be received and input by the receiver, but the signal output by the output circuit may be but not limited to be output to the transmitter and transmitted by the transmitter, and the input circuit and the output circuit may be The same circuit, which is used as an input circuit and an output circuit at different times.
  • the embodiment of the present application does not limit the specific implementation manners of the processor and various circuits.
  • a communication device is provided, and the device may be the second terminal in the second aspect above.
  • the device is used to execute the method provided by the second aspect above.
  • the device includes a transceiver.
  • the device further includes a memory, and the processor is coupled to the memory and can be used to execute instructions in the memory, so as to implement the second aspect and the communication method in any possible implementation manner of the second aspect.
  • the communication device further includes a memory, and the memory and the processor may be deployed separately or in a centralized manner.
  • the device further includes a communication interface, and the processor is coupled to the communication interface.
  • the communication interface may be a transceiver, or an input/output interface.
  • the device is a chip configured in the second terminal.
  • the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system.
  • the processor may also be embodied as a processing circuit or logic circuit.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the above-mentioned processor can be one or more chips
  • the input circuit can be an input pin
  • the output circuit can be an output pin
  • the processing circuit can be a transistor, a gate circuit, a flip-flop and various logic circuits, etc. .
  • the input signal received by the input circuit may be received and input by the receiver, but the signal output by the output circuit may be but not limited to be output to the transmitter and transmitted by the transmitter, and the input circuit and the output circuit may be The same circuit, which is used as an input circuit and an output circuit at different times.
  • the embodiment of the present application does not limit the specific implementation manners of the processor and various circuits.
  • a computer program product includes: a computer program (also referred to as code, or instruction), which, when the computer program is executed, causes the computer to perform the above-mentioned first aspect or the second aspect And the method in any possible implementation of the first aspect or the second aspect.
  • a computer program also referred to as code, or instruction
  • a computer-readable storage medium stores a computer program (also referred to as code, or an instruction) which, when run on a computer, causes the computer to perform the above-mentioned first aspect or The second aspect and the method in any possible implementation manner of the first aspect or the second aspect.
  • a computer program also referred to as code, or an instruction
  • a communication system including the above-mentioned first terminal and second terminal.
  • FIG. 1 is a schematic diagram of a communication system 100 applicable to an embodiment of the present application.
  • Fig. 2 is a schematic diagram of the LBT behavior of the FBE device provided in the present application.
  • FIG. 3 is a schematic diagram of the receiving terminal supporting information feedback in the PSFCH provided by the present application.
  • FIG. 4 is a schematic diagram of the configuration of PSFCH resources provided in the present application in the time domain.
  • FIG. 5 is a schematic diagram of configuration of PSFCH resources provided in the present application in the frequency domain.
  • Fig. 6 is a schematic diagram of resource multiplexing provided by the present application through code division.
  • FIG. 7 is a schematic flowchart of a method for transmitting side link feedback information provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of time-domain positions of side-link feedback information transmission provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of time domain locations where PSFCH resources are located according to the embodiment of the present application.
  • FIG. 10 is a schematic diagram of a frequency-domain position obtained by a first terminal provided in an embodiment of the present application.
  • FIG. 11 is a schematic diagram of frequency domain locations where PSFCH resources are provided by the embodiment of the present application.
  • Fig. 12 is a schematic diagram of simultaneous transmission of data and HARQ information in COT1 provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of frequency domain positions of PSFCH resources in COT1 provided by the embodiment of the present application.
  • FIG. 14 is a schematic block diagram of a first terminal provided by an embodiment of the present application.
  • FIG. 15 is a schematic block diagram of a second terminal provided by an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 1 is a schematic diagram of a communication system 100 applicable to an embodiment of the present application.
  • the communication system 100 shown in Fig. 1 (a) comprises network equipment 10, terminal equipment 20, and terminal equipment 21, wherein, terminal equipment 20 and terminal equipment 21 are all within the coverage of network equipment 10, network equipment 10 and terminal equipment communicate through the Uu air interface, and communicate between the terminal devices 20 and 21 through the PC5 interface.
  • the communication system 100 shown in Figure 1 (b) comprises a network device 10, a terminal device 20, and a terminal device 21, wherein the terminal device 20 is within the coverage of the network device 10, and the terminal device 21 is within the coverage of the network device 10 outside.
  • the communication system 100 shown in FIG. 1( c ) includes a network device 10 , a terminal device 20 , and a terminal device 21 , wherein neither the terminal device 20 nor the terminal device 21 is within the coverage of the network device 10 .
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • general packet radio service general packet radio service
  • LTE LTE frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunications system
  • WiMAX worldwide interconnection microwave access
  • 5G fifth generation, 5G
  • 5G fifth generation, 5G
  • 5G fifth generation, 5G
  • future evolution communication system vehicle to other devices
  • V2X can include vehicle to Internet (vehicle to network, V2N), vehicle to vehicle (vehicle to vehicle, V2V), vehicle to infrastructure (vehicle to infrastructure, V2I), Vehicle to pedestrian (vehicle to pedestrian, V2P), etc.
  • V2X can include vehicle to Internet (vehicle to network, V2N), vehicle to vehicle (vehicle to vehicle, V2V), vehicle to infrastructure (vehicle to infrastructure, V2I), Vehicle to pedestrian (vehicle to pedestrian, V
  • the network device in this embodiment of the present application may be any device with a wireless transceiver function.
  • the device includes but is not limited to: evolved node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B (node B, NB), radio network controller (radio network controller, RNC ), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved nodeB, or home node B, HNB), base band unit (base band unit, BBU) , the access point (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or transmission and reception point (transmission and reception point) in the wireless fidelity (wireless fidelity, WIFI) system , TRP), etc., can also be 5G, such as, NR, gNB in the system, or, transmission point (TRP or TP), one or a group
  • network equipment can be a traditional macro base station in a traditional universal mobile telecommunications system (UMTS)/LTE wireless communication system, or a micro base station in a heterogeneous network (HetNet) scenario, and a distributed
  • the base station scenario can be BBU and remote radio unit (remote radio unit, RRU).
  • RRU remote radio unit
  • the cloud radio access network cloud radio access network, CRAN
  • BBU pool baseband pool
  • RRU baseband pool
  • the network device may include a centralized unit (centralized unit, CU) and a DU, or an access network (radio access network, RAN) device including a CU node and a DU node.
  • a centralized unit centralized unit, CU
  • RAN radio access network
  • the RAN equipment including the CU node and the DU node separates the protocol layer of the eNB in the LTE system, and the functions of some protocol layers are placed in the centralized control of the CU, and the remaining part or all of the functions of the protocol layer are distributed in the In the DU, the CU centrally controls the DU.
  • the gNB may also include an active antenna unit (active antenna unit, AAU for short).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, and realizes the functions of radio resource control (radio resource control, RRC) and packet data convergence protocol (packet data convergence protocol, PDCP) layer.
  • the DU is responsible for processing physical layer protocols and real-time services, realizing the functions of the radio link control (radio link control, RLC) layer, media access control (media access control, MAC) layer and physical (physical, PHY) layer.
  • the AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas.
  • the network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in the RAN, and the CU can also be divided into network devices in a core network (core network, CN), which is not limited in this application.
  • the terminal equipment in the embodiment of the present application may refer to user equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device .
  • the terminal in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, an industrial Wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety Wireless terminals in smart cities, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop ( wireless local loop (WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, wearable device, vehicle user equipment (vehicle user equipment)
  • wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories.
  • Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.
  • the terminal device may also be a terminal device in an Internet of Things (internet of things, IoT) system.
  • IoT Internet of things
  • Its main technical feature is to connect objects to the network through communication technology, so as to realize the intelligent network of human-machine interconnection and object interconnection.
  • the present application does not limit the specific form of the terminal device.
  • the terminal device may be a device for realizing the function of the terminal device, or may be a device capable of supporting the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal.
  • the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
  • LTE-U Long Term Evolution
  • LAA enhanced licensed assisted access
  • feLAA enhanced licensed assisted access
  • NR-U the NR protocol technology in the unlicensed frequency band
  • the 3GPP organization discussed the method of integrating the frame structure of the Uu interface with the LBT mechanism.
  • SL-U Similar to the Uu interface, terminals working through SL-U also need to coexist with nearby Wi-Fi devices based on the LBT mechanism.
  • the LBT mechanism is a channel access rule based on random back-off, that is, before the terminal accesses the channel and starts sending data, it needs to monitor whether the channel is idle (idle). If you keep idle, you can occupy the channel. If you detect that the channel is not idle, you need to wait for the channel to return to idle before you can occupy the channel.
  • the LBT mechanism is a mandatory feature for using unlicensed frequency bands, because there are regulation requirements for the use of unlicensed frequency bands in various regions of the world. Various forms of terminals working on different communication protocols can only use unlicensed frequency bands if they meet the regulations, so as to use spectrum resources relatively fairly and efficiently. In order to meet the regulations, the 3GPP organization divides the LBT mechanism in the NR system into the following four categories:
  • Category 1 LBT (category 1 LBT): After the communication device obtains the channel occupancy time (Channel Occupancy Time, COT), it will immediately send data after a short switching interval (switching gap) from the receiving state, referred to as Cat 1 LBT.
  • COT refers to the time that the communication device is allowed to occupy the channel after successfully accessing the channel, and the switching interval cannot be greater than 16us.
  • Category 2 LBT LBT without random backoff, referred to as Cat 2 LBT, that is, after the communication device detects that the channel is idle for a fixed period of time, it can send data without random backoff.
  • Cat 3 LBT random backoff LBT with a fixed contention window size
  • the communication device generates a random number N based on a fixed-size contention window, and detects that the channel is in Data can be sent after the idle state lasts for a period of time determined according to the random number N.
  • the size of the competition window is related to the minimum value and maximum value of N.
  • LBT random backoff LBT with a variable size competition window, referred to as Cat 4 LBT, that is, the communication device generates a random number N based on a variable-size competition window, and detects that the channel is in an idle state And the data can be sent after a period of time determined according to the random number N.
  • the size of the contention window is related to the minimum value and maximum value of N, and the communication device can change the size of the contention window.
  • the NR-U device follows the 3GPP protocol and adopts the LBT mechanism as the channel access method.
  • LBT mechanism as the channel access method.
  • NR-U devices can use the following types of LBT mechanisms:
  • the first category it belongs to the Cat 1 LBT mechanism, and the conversion interval does not exceed 16us.
  • the NR-U device does not need to listen to the channel, and can directly send data after a conversion interval of at most 16us from the receiving state in the COT.
  • the second category it belongs to the Cat 2 LBT mechanism.
  • the NR-U device can access the channel and send data after detecting that the channel is idle for 16us.
  • the third category it belongs to the Cat 2 LBT mechanism.
  • the NR-U device can access the channel and send data after detecting that the channel is idle for 25us.
  • the fourth category belongs to the Cat 4 LBT mechanism. NR-U devices need to perform random backoff through a variable-sized competition window before they can access the channel and send data.
  • LBE load based equipment
  • FBE frame based equipment
  • LBE can perform channel detection and contention access at any point in time, without considering frame boundaries
  • the "frame” here means fixed frame period (fixed frame period, FFP), and the specific period value is configured by RRC signaling, such as the period value It can be 1 ms, 2 ms, 2.5 ms, 4 ms, 5 ms and 10 ms, all of which can be divisible by the duration of 2 radio frames (20 ms).
  • FIG. 2 is a schematic diagram of the LBT behavior of the FBE device provided in the present application.
  • the network device may be a gNB, and the gNB obtains a COT through channel contention access before each FFP and sends downlink (DL) data in the COT, the first terminal and the second terminal communicate with the gNB respectively, and the first terminal The second terminal and the second terminal do not need to obtain the COT, but send uplink (uplink, UL) data to the gNB through channel competition within the COT obtained by the gNB.
  • the following introduces the resource allocation mode and data transmission mode of SL in the NR system.
  • Base station resource allocation mode which is mainly used for SL communication in the case of network coverage.
  • the base station centrally allocates resources according to the buffer state report (buffer state report, BSR) report of the terminal.
  • the allocation of resources may be in a dynamic mode or a pre-configuration mode, and the resources allocated by the base station include initial resources and/or retransmission resources.
  • Mode 2 User-selected resource mode.
  • the transmission resources of the sending terminal do not depend on the base station, and the terminal selects transmission resources for communication by itself. This mode is not limited to network coverage, and the sending terminal can also use this mode to communicate without network coverage.
  • the user-selected resources include initial resources and/or retransmission resources.
  • the terminal avoids the selected resources from colliding with each other based on perception. Specifically, within the sensing window (sensing window), the terminal device analyzes sidelink control information (sidelink control information, SCI) from other terminal devices, measures reference signal received power (reference signal received power, RSRP), etc. Sensing, further, the terminal device excludes resources that have been reserved (reserved) or may be reserved based on the sensing results in the selection window (selection window), and selects the resources used by itself for transmission.
  • sidelink control information sidelink control information, SCI
  • RSRP reference signal received power
  • a sidelink hybrid automatic repeat request (hybrid automatic repeat request, HARQ) retransmission scheme is proposed in NR-V2X.
  • the receiving terminal will feed back HARQ information to the sending terminal according to the decoding situation of the data. For example, when the receiving terminal correctly decodes the data transmitted in the physical sidelink shared channel (PSSCH), the feedback ACK, when the receiving end cannot correctly decode the data transmitted in the PSSCH, it will feed back NACK.
  • Whether the receiving terminal supports feedback information in the physical layer sidelink feedback channel (physical sidelink feedback channel, PSFCH) depends on the configuration of the resource pool and the HARQ feedback enabled/ disabled indicator field.
  • the sending terminal can reserve retransmission resources through the frequency domain resource assignment field "Frequency resource assignment" and the time domain resource assignment field "Time resource assignment" in the SCI.
  • FIG. 3 is a schematic diagram of a receiving terminal supporting information feedback in a PSFCH provided in the present application.
  • R1, R2 and R3 are the data sent by the sending terminal to the receiving terminal at t m , t m+t1 , t m+t2
  • the HARQ information between R1 and R2 is used to feedback the decoding of data R1, R2 and R3
  • the HARQ information in between is used to feedback the decoding status of the data R2, and the HARQ information is carried in the PSFCH.
  • the time domain distance between R1 and R2 and R2 and R3 needs to be greater than the minimum processing time (or PSFCH interval) required by PSFCH.
  • the PSFCH resource is determined by the time-frequency resource occupied by the PSSCH and/or a physical layer sidelink control channel (physical sidelink control channel, PSCCH) and high-layer parameters.
  • the high-level parameters include the period of PSFCH (periodPSFCHresource), the minimum interval between PSSCH resources and PSFCH resources (MinTimeGapPSFCH), the PSFCH RB resources configured in the resource pool (sl-PSFCH-RB-Set-r16), and the number of subchannels included in the resource pool number(numSubchannel).
  • FIG. 4 is a schematic diagram of the configuration of PSFCH resources in the time domain provided by the present application.
  • the period of PSFCH is the time interval between adjacent PSFCH resources.
  • the transmitted data feeds back information in the PSFCH resource in time slot 6, and the data transmitted in time slots 5-8 feeds back information in the PSFCH resource in time slot 10.
  • the penultimate symbol of each time slot carrying PSFCH is used for feedback information transmission.
  • Automatic gain control automatic gains control, AGC
  • GAP is used for transmitting and receiving conversion.
  • AGC and GAP each occupy one symbol.
  • FIG. 5 is a schematic diagram of configuration of PSFCH resources in the frequency domain provided by the present application.
  • the symbol where the PSFCH is located includes a total of 20 RBs
  • the PSFCH RB resource configured in the resource pool is determined by the high-level parameter sl -PSFCH-RB-Set-r16 indication
  • bitmap bitmap
  • Fig. 6 is a schematic diagram of resource multiplexing provided by the present application through code division.
  • code division can be used, and the specific sequence is determined by the identifier (identifier, ID) of the sending terminal and the ID of the receiving terminal.
  • identifier identifier, ID
  • the number NF of the PSFCH RB indicated by sl-PSFCH-RB-Set-r16 16
  • the number of subchannels numSubchannel 2 included in the resource pool
  • the period of PSFCH 4
  • one subchannel corresponds to
  • PSFCH resources 0 and 1 correspond to PSSCH0 resources
  • PSFCH resources 4 and 5 correspond to PSSCH2 resources
  • PSFCH resources 10 and 11 correspond to PSSCH5 resources
  • PSSCH5 resources have multiple receiving terminals sending feedback information.
  • code division is required.
  • the multiple sequences carried in the PSSCH5 resource are determined by the ID of the sending terminal and the ID of the receiving terminal, and the maximum number of cyclic shift pairs (numMaxCSPair) shown in FIG. 6 is 6.
  • PSFCH resources are determined based on the time-frequency resources occupied by PSSCH and/or PSCCH transmission and high-layer parameters, because the high-layer parameters are pre-configured on the resource pool, that is, after the configured high-layer parameters are determined, the position of the PSFCH resources is also determined.
  • SL is transmitted on unlicensed spectrum, all transmission resources, including PSFCH resources, need to be obtained through the LBT contention access mechanism. Therefore, the fixed PSFCH configuration method no longer matches the requirement of using unlicensed spectrum for transmission.
  • the sending terminal after the sending terminal successfully competes for channel access, it can determine the time domain position, frequency domain position or code domain sequence of the PSFCH resource in the COT through indication or configuration.
  • the data transmitted in PSSCH needs decoding time, and the feedback in PSFCH also needs preparation time, such processing delay may cause the data transmitted in PSSCH near the end of COT to be too late to be fed back in this COT.
  • This application proposes a side link feedback information method, which enables the sending terminal to feed back HARQ information that has not been fed back before, and the sending terminal can support competing for PSFCH resources for one or more receiving terminals, thereby reducing a Or the possibility of competition failure caused by multiple receiving terminals competing for PSFCH resources, and can further improve the accuracy of data transmission.
  • FIG. 7 is a schematic flowchart of a method for transmitting side link feedback information provided by an embodiment of the present application.
  • the method 200 shown in FIG. 7 includes:
  • Step 210 the first terminal sends first indication information to the second terminal, where the first indication information indicates that the first channel occupation time includes the first PSFCH resource, and correspondingly, the second terminal receives the first indication information.
  • the second channel occupancy time COT2 is acquired.
  • FIG. 8 is a schematic diagram of time-domain positions of side-link feedback information transmission provided by the embodiment of the present application.
  • COT2 includes 10 time slots, and the first terminal can transmit data to different receiving terminals within the 10 time slots, assuming that the HARQ information corresponding to the first 7 time slots can be fed back in COT2 , and the PSFCH resource carrying the above HARQ information may be located in the last time slot in COT2.
  • the data transmitted on time slots 7, 8, and 9 close to the end of COT2 correspond to receiving UE-1, UE-2, and UE-3 respectively. At this time, due to the decoding processing delay of information in PSCCH and/or PSSCH, etc.
  • the first terminal needs to additionally use LBT to compete for the channel to obtain resources, so as to instruct the receiving terminal of the data, so that the receiving terminal of the data feeds back the HARQ information of the data transmitted in the above-mentioned time slots 7, 8, and 9. That is, the first terminal successfully acquires the first channel occupancy time COT1 through the LBT mechanism, and the resource corresponding to the COT1 includes the first PSFCH resource, and indicates it to the receiving terminal through the first indication information.
  • the first indication information sent by the first terminal to the second terminal includes an identification field, where the identification field indicates that resources corresponding to COT1 include the first PSFCH resource.
  • the identification field may be a reserved field or other fields in sidelink control information (sidelink control information, SCI), where the reserved field may be located in the first-level SCI, and other fields may be located in the second-level SCI.
  • SCI sidelink control information
  • the second terminal can recognize that the current SCI indicates that the resource corresponding to COT1 includes the first PSFCH resource.
  • the identification field may be 1 bit, and 1 bit indicates whether the resource corresponding to COT1 includes the first PSFCH resource. When the bit is 0, it means that the resource corresponding to COT1 includes the first PSFCH resource.
  • the bit When the bit is 1, it means The resource corresponding to COT1 does not include the first PSFCH resource, or when this bit is 1, it indicates that the resource corresponding to COT1 includes the first PSFCH resource, and when this bit is 0, it indicates that the resource corresponding to COT1 does not include the first PSFCH resource.
  • the application does not impose any restrictions on this.
  • Step 240 the second terminal sends feedback information to the first terminal on the first PSFCH resource, and correspondingly, the first terminal receives the feedback information.
  • the second terminal sends the first HARQ information to the first terminal at the resource corresponding to the first channel occupation time, the first HARQ information is the feedback to the first data, and the first data is the second terminal's information on the second channel For the data received from the first terminal within the occupied time, the first channel occupied time is after the second channel occupied time.
  • method 200 also includes:
  • Step 220 the first terminal sends second indication information to the second terminal, where the second indication information indicates information of the first data corresponding to the first HARQ information, and correspondingly, the second terminal receives the second indication information.
  • the second indication information includes a PSSCH source identifier (PSFCH Source ID) and/or a destination identifier (PSFCH Destination ID), and the PSSCH source identifier and destination identifier can be used to determine the first data corresponding to the first HARQ information.
  • PSFCH Source ID PSFCH Source ID
  • PSFCH Destination ID PSSCH source identifier and destination identifier
  • the second terminal after receiving the second indication information, determines the first data according to the PSSCH source identifier and destination identifier indicated by the second indication information, and sends the first HARQ data to the first terminal on the first PSFCH resource. information.
  • the second terminal determines which data needs to be fed back during the second channel occupation time by identifying the PSSCH source identifier and/or destination identifier. Assume that the second terminal determines that the first data needs to be fed back by identifying the PSSCH source identifier and/or the destination identifier, and then sends the first HARQ information to the first terminal on the first PSFCH resource.
  • the reasons why the first data needs to be fed back may include the following: the second terminal determines that the first HARQ information is not fed back for the first data within the second channel occupation time, or the second terminal responds to the first HARQ information within the second channel occupation time.
  • the first HARQ information of a data feedback is not received by the first terminal, or there are other factors that cause the second terminal to feed back the first HARQ information during the first channel occupancy time.
  • the sending terminal it is necessary to indicate in the second indication information the PSSCH source identification and/or destination identification corresponding to the three transmissions of time slots 7, 8, and 9 shown in FIG. 8
  • the receiving ends UE-1, UE-2, and UE-3 corresponding to time slots 7, 8, and 9 can judge whether they need to feed back HARQ information according to the PSSCH source identifier and/or destination identifier, and judge whether they need to which data to feed back.
  • the receiving terminal determines the data to be fed back, it sends the first HARQ information to the first terminal on the first PSFCH resource for feedback.
  • the second indication information indicates the number of HARQ processes and/or the new data indication of the PSSCH, and the number of HARQ processes and/or the new data indication can be used to determine the first data corresponding to the first HARQ information.
  • the number of HARQ processes and/or new data indicators can be indicated by the "PSFCH HARQ process number" and "PSFCH New data indicator" in the second-level SCI.
  • PSFCH HARQ process number and "PSFCH New data indicator” in the second-level SCI.
  • the "HARQ process number” and "New data indicator” fields in the prior art The “New data indicator” field is to indicate the PSSCH corresponding to the current SCI.
  • the second terminal parses the "PSFCH HARQ process number” and "PSFCH New data indicator” fields, and compares them with the "HARQ process number” and "New data indicator” corresponding to the PSSCH previously received within the second channel occupation time. If the "PSFCH HARQ process number” and "PSFCH New data indicator” fields are the same as the "HARQ process number” and "New data indicator” corresponding to a previously received PSSCH, it can be determined that the second channel is required to be carried within the occupied time. The data on the PSSCH is fed back.
  • the above-mentioned sending terminal refers to the sending end of the data, the receiving end of the feedback information (HARQ information), that is, the first terminal in this application, the receiving terminal refers to the receiving end of the data, and the sending end of the feedback information (HARQ information), That is, the second terminal in this application, and the following descriptions can be deduced by analogy.
  • HARQ information the receiving end of the feedback information
  • HARQ information the sending end of the feedback information
  • first terminal in the present application may send data to one or more receiving terminals
  • second terminal in the embodiment of the present application is one of the receiving terminals.
  • the resource information includes time domain resources, frequency domain resources and code domain resources. Specifically, it can be determined in the following ways:
  • time domain resources, frequency domain resources and code domain resources occupied by PSFCH resources are predefined, or are preconfigured values, or are configured by network equipment.
  • the first terminal sends indication information to the second terminal to indicate time domain resources, frequency domain resources and code domain resources occupied by PSFCH resources.
  • the time domain resource of the first PSFCH resource is determined based on the index of the starting time unit of the first PSFCH resource and/or the number of time units occupied by the first PSFCH resource.
  • the index of the starting time unit of the first PSFCH resource and/or the number of time units occupied by the first PSFCH resource may be determined according to a predefined or pre-configured value or network device configuration.
  • the predefined or pre-configured value is pre-configured at both ends of the sending terminal or the receiving terminal, and the network device configuration can be configured through downlink control information (downlink control information, DCI) or radio resource control (radio resource control, RRC ) signaling, or system information block (system information block, SIB) carries resource configuration information, thereby indicating the index of the starting time unit of the first PSFCH resource and/or the number of time units occupied by the first PSFCH resource.
  • DCI downlink control information
  • RRC radio resource control
  • SIB system information block
  • the method 200 includes step 230, the first terminal sends third indication information to the second terminal, where the third indication information indicates the index of the starting time unit of the first PSFCH resource and/or or the number of time units occupied by the first PSFCH resource, and correspondingly, the second terminal receives the third indication information.
  • the time unit occupied by the PSFCH resource in COT1 may be the last 1 to N number of timeslots in the time slot where the first indication information is located.
  • the symbol, or the time unit occupied by the PSFCH resource in COT1 is a time slot after the time slot where the first indication information is located.
  • the specific time domain position of the PSFCH can be determined by the index of the starting time slot or symbol of the PSFCH resource in COT1, and/or the number of time slots or symbols occupied by the PSFCH resource.
  • FIG. 9 is a schematic diagram of time domain locations where PSFCH resources are located according to the embodiment of the present application.
  • the PSFCH resource and the first indication information are in the same time slot, and are located in the last symbol of the time slot.
  • the PSFCH resource and the first indication information are located in adjacent time slots.
  • the PSFCH resource may occupy all or part of the symbols of the time slot.
  • the time-domain symbols between the first indication information and PSFCH resources can be used to send cyclic prefix extension (cyclic prefix extension, CPE), the content of CPE is the copy of the first indication information, the purpose is to occupy the channel, because in use In unlicensed spectrum, if the channel is idle for more than a certain period of time, the channel will be preempted by other devices.
  • CPE cyclic prefix extension
  • the index of the starting time unit of the first PSFCH resource or the number of time units occupied by the first PSFCH resource may be determined according to a predefined or pre-configured value, or network device configuration, without presetting Definitions, or preconfigured values, or parameters of network device configuration may be indicated by indication information.
  • the index of the start time unit of the first PSFCH resource is determined through a predefined or pre-configured value, or network device configuration, and the number of time units occupied by the first PSFCH resource is determined through indication information.
  • the number of time units occupied by the first PSFCH resource is determined through predefined, preconfigured values, or network device configuration, and the index of the starting time unit of the first PSFCH resource is determined through indication information.
  • the index of the starting frequency domain unit of the first PSFCH resource and/or the number of frequency domain units occupied by the first PSFCH resource may be determined according to a predefined or preconfigured value or network device configuration.
  • the predefined or pre-configured value is pre-configured at both ends of the sending terminal or the receiving terminal, and the network device configuration can be configured through downlink control information (downlink control information, DCI) or radio resource control (radio resource control, RRC ) signaling, or system information block (system information block, SIB) carries resource configuration information, thereby indicating the index of the starting frequency domain unit of the first PSFCH resource and/or the number of frequency domain units occupied by the first PSFCH resource .
  • DCI downlink control information
  • RRC radio resource control
  • SIB system information block
  • the method 200 includes step 231, the first terminal sends fourth indication information to the second terminal, where the fourth indication information indicates the index and the starting frequency domain unit of the first PSFCH resource /or the number of frequency domain units occupied by the first PSFCH resource, and correspondingly, the second terminal receives the fourth indication information.
  • the frequency domain unit may be a subchannel or RB, where the RB may be based on an interlace structure or a non-interlace structure, and an interleaved resource block is newly introduced in an unlicensed communication system
  • a type of resource allocation for an interleaved structure For a detailed description, reference may be made to descriptions in related technologies, and details are not repeated here.
  • a non-interleaved structure represents RBs arranged in a natural order.
  • FIG. 10 is a schematic diagram of frequency domain resources obtained by the first terminal.
  • the bandwidth of the frequency domain resource is 20 megahertz (MHZ), including 10 interleaving resource blocks.
  • the horizontal stripe resources in the figure constitute an interleaving resource block, that is, the horizontal stripe resources with indexes ⁇ 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 ⁇ constitute an interleaving resource block
  • the vertical stripe resource constitutes another interleaved resource block, that is, the vertical stripe resource whose index is ⁇ 1,11,21,31,41,51,61,71,81,91,101 ⁇ constitutes an interleaved resource block.
  • each interleaved resource block can be used for one terminal to transmit data.
  • the interleaving resource blocks formed by horizontal stripe resources in the figure can be used for data transmission by one terminal device, and the interleaved resource blocks formed by vertical stripe resources in the figure can be used for data transmission by another terminal device.
  • the 10 interleaved resource blocks shown in FIG. 10 are just an example, and may also include other numbers of interleaved resource blocks, for example, 5.
  • the embodiment of the present application is for This is not limited.
  • the frequency domain resource of the first PSFCH resource may be determined by the starting subchannel index or RB index in the time unit where the first PSFCH resource is located, and the number of occupied subchannels or RBs. Since the data not fed back in COT2 may correspond to multiple receiving terminals, COT1 may include multiple PSFCH resources at this time, that is, a PSFCH resource set, and the PSFCH resource set is a set of PSFCH resources on the time unit where the first PSFCH resource is located.
  • the PSFCH resource set includes the first PSFCH resource, where the first PSFCH resource is used for the second terminal to feed back the first HARQ information, and the second terminal is one of the multiple receiving terminals. It should be understood that other PSFCH resources in the PSFCH resource set except the first PSFCH resource are used for other receiving terminals to feed back HARQ information.
  • the frequency domain resources of the PSFCH resources in the PSFCH resource set may be determined based on at least one of the bitmap (bitmap), the initial PSFCH resource of the PSFCH resource set and the interval, which is the adjacent PSFCH resource in the PSFCH resource set The frequency-domain cell spacing between .
  • the time unit where the first PSFCH resource is located includes N frequency domain units, and the frequency domain unit belonging to the PSFCH resource set can be determined from the N frequency domain units in a bitmap manner.
  • N bits are used to indicate the frequency domain units belonging to the PSFCH resource set among the N frequency domain units.
  • the N bits can be 1100011000, that is, the PSFCH resource set includes the first frequency unit in the 10 frequency units.
  • the frequency domain unit position of each PSFCH resource in the PSFCH resource set may be determined according to the frequency domain unit position and/or the frequency domain unit interval where the initial PSFCH resource is located.
  • the above bitmap, the frequency domain position where the starting PSFCH resource is located or the frequency domain unit interval may be predefined, or a pre-configured value, or configured by a network device.
  • the network device can be configured through DCI, RRC or SIB information.
  • the index of the starting frequency domain unit of the first PSFCH resource or the number of frequency domain units occupied by the first PSFCH resource may be determined according to a predefined or preconfigured value, or network device configuration, without Predefined or preconfigured values, or parameters configured by network devices may be indicated by indication information.
  • the index of the starting frequency domain unit of the first PSFCH resource is determined through pre-definition, or pre-configured value, or network device configuration, and the number of frequency domain units occupied by the first PSFCH resource is determined through indication information.
  • the frequency domain resource of the first PSFCH resource (for example, the index of the starting frequency domain unit of the first PSFCH resource) is determined based on the time domain position of the first data within the second channel occupation time.
  • the index of the starting frequency domain unit of the first PSFCH resource whether it is predefined, preconfigured, or indicated by the indication information may be an index of an absolute position, or an index of a relative position.
  • the index of the absolute position refers to the index of the starting frequency domain unit of the first PSFCH resource, which is the index of the frequency domain unit included in the time unit where the first PSFCH resource is located.
  • the time unit where the first PSFCH resource is located includes a total of 10 subchannels
  • the index of the starting frequency domain unit of the first PSFCH resource is 3, that is, the starting frequency domain unit of the first PSFCH resource is the subchannel whose index is 3.
  • the index of the relative position refers to the index of the starting frequency domain unit of the first PSFCH resource, which is the index of the frequency domain unit where the PSFCH resource in the PSFCH resource set is located.
  • the time unit where the first PSFCH resource is located includes a total of 10 subchannels.
  • the resource occupies 5 subchannels, and the index of the starting frequency domain unit of the first PSFCH resource is 3, that is, the starting frequency domain unit of the first PSFCH resource is the subchannel whose index is 3 among the 5 subchannels occupied by the PSFCH resource.
  • FIG. 11 is a schematic diagram of frequency domain locations where PSFCH resources are provided by the embodiment of the present application.
  • OCB occupied channel bandwidth
  • 20MHz at least 16MHz of bandwidth is needed to preempt the 20MHz channel.
  • all receivers can send unified HARQ information on a common PSFCH resource.
  • the location of the common PSFCH resource may be predefined, or a pre-configured value, or configured by a network device (the configuration is carried by DCI, RRC, or SIB information).
  • the positions of the common PSFCH resources may be the first (PSFCH 0) and the last (PSFCH N) of the N PSFCH resources.
  • the index of the starting frequency domain unit of the first PSFCH resource is determined based on the time domain position where the first data is located within the second channel occupation time.
  • the corresponding relationship between the index of the above-mentioned frequency domain unit and the time domain position where the first data is located within the second channel occupation time can be used in the scheme of determining the first PSFCH resource by means of pre-definition, pre-configuration, etc., and can also be used in In the scheme of determining the first PSFCH resource by using the indication information.
  • the receivers of the data transmitted in COT2 include UE-1, UE-2 and UE-3, then the indexes of PSFCH resources occupied by UE-1, UE-2 and UE-3 feedback HARQ information can be based on the The order of the data in the time domain is determined, and it can be sorted in sequence or in reverse order, and this application does not impose any restrictions on this.
  • the data carried in time slots 7, 8, and 9 do not feed back HARQ information, and the receiving ends of the data carried in time slots 7, 8, and 9 are respectively UE-1, UE- 2, UE-3, therefore, the index corresponding to the PSFCH resource of the receiving UE-1 is 1, the index of the corresponding PSFCH resource of the receiving UE-2 is 2, and the index of the corresponding PSFCH resource of the receiving UE-3 is 3.
  • the indexes of PSFCH resources corresponding to receiving UE-1, receiving UE-2, and receiving UE-3 are 3, 2, and 1 respectively. .
  • the code domain resource is the sequence cyclic phase offset, specifically including m 0 and m cs .
  • the PSFCH sequence can be generated by a ZC (Zadoff–Chu) sequence based on low peak-to-average ratio, which occupies one or more consecutive orthogonal OFDM symbols in the time domain, and can be one or more resource blocks in the frequency domain.
  • the generation method of the PSFCH sequence is as follows:
  • a basic sequence r(n) can be generated according to the sequence length, 0 ⁇ n ⁇ M ZC , and then the phase rotation of the basic sequence r(n) can be performed to obtain a low peak-to-average ratio sequence that can be reused.
  • the comparison sequence satisfies the formula (1).
  • M ZC 12
  • ⁇ l represents the phase rotation value. That is to say, different phase rotation values ⁇ l can be used to generate different PSFCH sequences, and each PSFCH sequence can be code-division multiplexed on one physical resource block (physical resource block, PRB) for transmission. Since the second terminal needs to feed back ACK/NACK information, at least two sequences need to be allocated to each terminal, and these sequences correspond to different values of ⁇ l , wherein the phase rotation value ⁇ l can satisfy formula (2).
  • formula (2) Indicates the number of subcarriers in a PRB, in the NR system, The value of can be 12.
  • mod() means taking the remainder, Indicates the number of the SL transmission slot corresponding to the current subcarrier interval ⁇ in a radio frame.
  • l' represents the symbol index relative to the first OFDM symbol on the current PSFCH transmission slot.
  • the specific generation process of c(n) is as follows:
  • x 1 (k+31) (x 1 (k+3)+x 1 (k)) mod 2
  • x 2 (k+31) (x 2 (k+3)+x 2 (k+2)+x 2 (k+1)+x 2 (k)) mod 2
  • m 0 represents the initial phase of a PSFCH resource pair
  • m cs represents the offset of the ACK/NACK sequence in a PSFCH resource pair relative to the initial phase.
  • One PSFCH resource pair can be used for HARQ feedback, wherein one sequence can be used for feeding back ACK, and the other sequence can be used for feeding back NACK.
  • the value of m cs may be as shown in Table 2 or Table 3.
  • the PSFCH resource index also needs to consider the number of sequence pairs that can be carried on the same physical resource block.
  • the PSFCH resource set occupies one symbol in the time domain and 10 physical resource blocks in the frequency domain, and each physical resource block has 6 sequence pairs, that is, the PSFCH resource set includes 60 PSFCH resources.
  • the time domain, frequency domain, and code domain need to be considered when sorting the PSFCH resources.
  • the data not fed back in COT2 corresponding to UE-1, UE-2 and UE-3 are sorted in time domain order or reverse order, if the PSFCH resource set occupies one symbol in the time domain, in the frequency domain
  • Each physical resource block occupies 1 physical resource block, and each physical resource block has 3 sequence pairs, that is, the PSFCH resource set includes 3 PSFCH resources, and one PSFCH resource corresponds to 1 sequence pair.
  • the index of the PSFCH resource corresponding to UE-1 is 1
  • the index of PSFCH resource corresponding to UE-2 is 2
  • the index of PSFCH resource corresponding to UE-3 is The index corresponding to the PSFCH resource is 3.
  • the indexes of PSFCH resources corresponding to UE-1, UE-2, and UE-3 are 3, 2, and 1.
  • the PSFCH resource is indicated by the indication information
  • Method 200 introduces that when the first terminal obtains COT2 through the LBT mechanism, and transmits data on resources corresponding to COT2, because the feedback information of individual data is not fed back in COT2, the first terminal obtains COT1 again through the LBT mechanism, and The second terminal is indicated by the first indication information that the COT1 includes the first PSFCH resource, so that the second terminal feeds back the first HARQ information on the first PSFCH resource.
  • the second terminal may determine the first PSFCH resource through predefined or pre-configured information of the network device, thereby determining specific resources (time domain, frequency domain, code domain resources) of the first PSFCH resource ), and send the first HARQ information on the first PSFCH resource.
  • the second terminal determines specific resources of the first PSFCH resource in combination with the third indication information and/or the fourth indication information, and sends the first HARQ information on the first PSFCH resource.
  • the second terminal may determine specific resources of the first PSFCH resource by combining pre-definition, network device pre-configuration and indication information, and send the first HARQ information on the first PSFCH resource.
  • the time domain resources are determined by means of pre-definition and pre-configuration, and the frequency-domain resources are determined by indicating information; or whether the frequency-domain resources are determined by means of pre-definition and pre-configuration, and the time-domain resources are determined by means of indication information, this application does not do this any restrictions.
  • the time domain parameters (the index of the starting time unit, or the number of occupied time units) in a predefined and preconfigured way, without other time domain parameters and frequency domain resources that are predefined or preconfigured Indicated by the instruction message.
  • a part of the frequency domain parameters (the index of the starting frequency domain unit, or the number of occupied frequency domain units) may be determined in a predefined and preconfigured manner, and other frequency domain parameters and time domain parameters that are not predefined or preconfigured
  • the domain resources are indicated by indication information, and this application does not impose any restrictions on this.
  • the second terminal needs to determine which data in the COT2 needs to be fed back through the second indication information.
  • the method 200 may also be: after the first terminal acquires COT1 again through the LBT mechanism, directly indicate to the second terminal the specific resource (time domain, frequency domain, code domain resource), so that the second terminal feeds back the first HARQ information on the first PSFCH resource. That is, the first terminal may not send the first indication information to tell the second terminal that COT1 includes the first PSFCH resource, but directly indicate the resource location of the first PSFCH resource through the third indication information and/or the fourth indication information, so that the second After receiving the third indication information and/or the fourth indication information, the second terminal sends the first HARQ information at the resource position indicated by the first terminal.
  • the terminal may determine the first PSFCH resource for sending the first HARQ information through a predefined rule.
  • the second terminal can determine the position N in the time domain where the first data is located, so that it can determine to send the first HARQ information at the position N+K in the time domain, and the frequency domain resources occupied by the first HARQ information can be determined by the first The method for determining frequency domain resources of PSFCH resources is determined.
  • the first terminal after the first terminal obtains COT1 again through the LBT mechanism, it indicates the resource pass indication information corresponding to COT1 to the second terminal (optionally, sends the first indication information to indicate that the second terminal COT1 includes the first PSFCH resource), and
  • the specific resource (time domain, frequency domain, code domain resource) of the first PSFCH resource is indicated by the third indication information and/or the fourth indication information, so that the second terminal feeds back the first HARQ information on the first PSFCH resource.
  • the process of the third indication information indicating the time domain resource of the first PSFCH resource may indicate all the time domain resource parameters (the index of the starting time unit and the number of occupied time units), or it may be the indication part
  • the time-domain resource parameters (the index of the starting time unit or the number of occupied time units), and the time-domain resource parameters not indicated by the third indication information are determined in a predefined or pre-configured manner.
  • the process of the fourth indication information indicating the frequency domain resource of the first PSFCH resource may indicate all frequency domain resource parameters (the index of the starting frequency domain unit and the number of occupied frequency domain units), or may be Indicates part of the frequency domain resource parameters (the index of the starting frequency domain unit or the number of occupied frequency domain units), and the frequency domain resource parameters not indicated by the fourth indication information are determined in a predefined or preconfigured manner.
  • At least one item of the first indication information, the second indication information, the third indication information, and the fourth indication information is carried in the SCI, and the first terminal sends the SCI to the second terminal in COT1.
  • the above-mentioned third indication information and fourth indication information may respectively indicate time domain resources and frequency domain resources of the first PSFCH resource, that is, the third indication information indicates the time domain resource of the first PSFCH resource through a field, and the first PSFCH resource indicates the time domain resource of the first PSFCH resource.
  • the four indication information indicates the frequency domain resource of the first PSFCH resource through another field.
  • the third indication information and the fourth indication information may indicate the time domain resource and the frequency domain resource of the first PSFCH resource through the same field, which is not limited in this application.
  • the second terminal when the data sender (the first terminal) seizes the resource corresponding to the first channel occupation time based on the LBT mechanism, the second terminal sends feedback information on the resources seized by the first terminal, compared to the second terminal itself In terms of the scheme of sending feedback information by competing for resources, it can reduce the possibility of failure of the second terminal in competition and improve the accuracy of data transmission.
  • the above describes how the first terminal obtains COT1 again through the LBT mechanism.
  • the COT1 is used for the second terminal to feed back the first HARQ information.
  • the COT1 can also be used for data transmission in addition to being used for the second terminal to feed back the first HARQ information.
  • the following describes an embodiment in which COT1 is used both for feeding back the first HARQ information and for transmitting data.
  • the first PSFCH resource in the method 200 is not only used to feed back the first HARQ information, but also used to feed back the second HARQ information, and the second HARQ information is feedback to the second data, and the second The data is data sent by the first terminal to the second terminal within the first channel occupancy time (COT1).
  • COT1 channel occupancy time
  • the specific resources (time domain, frequency domain, and code domain resources) of the first PSFCH resource in this embodiment are determined in the same manner as the description of each step in the method 200 above, and details are not repeated here.
  • FIG. 12 is a schematic diagram of a first terminal and a second terminal transmitting data and HARQ information in COT1 according to an embodiment of the present application.
  • the second channel occupancy time COT2 is obtained. Assuming that COT2 includes 10 time slots, the first terminal can transmit PSSCH to different receiving terminals within the above 10 time slots.
  • the HARQ information corresponding to the slot can be fed back in COT2, and the PSFCH resource corresponding to the above HARQ information can be located in the last time slot in COT2.
  • the HARQ information corresponding to receiving UE-1, receiving UE-2, and receiving UE-3 on time slots 7, 8, and 9 close to the end of COT2 is too late to feed back in COT2 .
  • the first terminal needs to additionally perform LBT for the PSFCH resources corresponding to the above timeslots 7, 8, and 9 to compete for channels.
  • the first terminal performs LBT again and successfully acquires a new first channel occupancy time COT1.
  • the first 7 time slots in the COT1 are used to transmit data, and the data may be data sent by the first terminal to different receiving terminals, and the receiving terminal may include the second terminal. Alternatively, the data may be different data sent by the first terminal to the same receiving terminal.
  • the first PSFCH resource included in the resources corresponding to COT1 is used to send the first HARQ information and the second HARQ information
  • the second HARQ information is the feedback of the second data (the data receiving end is the second terminal) transmitted on the first 7 time slots in COT1, other PSFCH resources except the first PSFCH resource included in the resources corresponding to COT1
  • the resources are used to feed back HARQ information corresponding to data received by other receiving terminals (receiving terminals other than the second terminal) in COT1 and COT2.
  • the PSFCH resources included in the resource corresponding to COT1 are used for feedback
  • the HARQ information corresponding to the data received by UE1, UE2, and UE3 in COT1 and the data received by other receiving terminals (receiving terminals other than the second terminal) in COT2 correspond HARQ information.
  • time unit in FIG. 12 is an example of a time slot, and of course may also be a symbol or other time units, which will not be described in detail herein.
  • the indication information used to indicate the first PSFCH resource may be carried in the 9th time slot in COT1, this is only an example, and this embodiment of the present application does not impose any limitation on this.
  • the tenth time slot in COT1 in FIG. 12 is used to transmit PSFCH, and the specific distribution of PSFCH resources on this time slot can be shown in FIG. 13 .
  • the PSFCH resource set on the time slot includes N PSFCH resources, and some of the PSFCH resources (such as PSFCH1, PSFCH2, PSFCH3) are used to feed back the HARQ information corresponding to the transmission data in COT2, and the HARQ information includes the first HARQ information.
  • Part of the PSFCH resource (for example, PSFCH4-PSFCH N-1) is used to feed back the HARQ information corresponding to the transmission data in COT1, and the HARQ information includes the second HARQ information.
  • the location of the common PSFCH resource may be predefined, or pre-configured, or configured by the network (indicated/configured by DCI, RRC, or SIB information bearer). For example, it may be the first (PSFCH1) and the last (PSFCH N) of the N PSFCH resources.
  • the relative positions of the PSFCH resources used to feed back the data transmitted in COT1 and the PSFCH resources used to feed back the data transmitted in COT2 shown in FIG. 13 are only examples, and this application does not make any limitations .
  • the relative position of each PSFCH resource in the PSFCH resource set is related to the time domain position of the corresponding data in COT1 or COT2, specifically whether it is sequence correlation or reverse sequence correlation, which is not limited by this application.
  • the receiving terminal can be indicated by indicating information.
  • Data information such as PSSCH source identifier and/or destination identifier, so that the receiving terminal determines which data needs to be fed back through the PSSCH source identifier and/or destination identifier.
  • the data corresponding to the PSSCH source identifier and/or destination identifier indicated by the indication information may be in COT1 or in COT2.
  • the data corresponding to the PSSCH source identifier and destination identifier indicated by the second indication information in step 220 is in COT2.
  • the first terminal may seize the resource corresponding to the first channel occupation time through the LBT mechanism, and use it for transmitting data and feedback information.
  • the first terminal preempts the resource for data transmission, and at the same time, the first terminal can receive the HARQ information corresponding to the data that has not fed back HARQ information within the second channel occupation time before the preempted resource, making up for a certain
  • the data within the second channel occupation time does not have the defect of feedback during the second channel occupation time, which improves the feedback mechanism of the data transmission process.
  • execution subject shown in FIG. 7 is only an example, and the execution subject may also be a chip, a chip system, or a processor that supports the execution subject to implement the method shown in FIG. 7 , which is not limited in the present application.
  • the methods and operations implemented by the sending terminal may also be implemented by components that can be used for the sending terminal or the receiving terminal (eg chip or circuit) implementation.
  • each device element such as a transmitter device or a receiver device, includes a corresponding hardware structure and/or software module for performing each function in order to realize the above functions.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.
  • the embodiment of the present application can divide the functional modules of the transmitting end device or the receiving end device according to the above method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module middle.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation. In the following, description will be made by taking the division of each functional module corresponding to each function as an example.
  • Fig. 14 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • the communication device 1400 includes a transceiver unit 1410 and a processing unit 1420 .
  • the transceiver unit 1410 can communicate with the outside, and the processing unit 1420 is used for data processing.
  • the transceiver unit 1410 may also be called a communication interface or a communication unit.
  • the communication device 1400 may further include a storage unit, which may be used to store instructions and/or data, and the processing unit 1420 may read instructions or and/or data in the storage unit.
  • a storage unit which may be used to store instructions and/or data
  • the processing unit 1420 may read instructions or and/or data in the storage unit.
  • the communication device 1400 may be a first terminal
  • the transceiver unit 1410 is used to perform the receiving or sending operation of the first terminal in the method embodiment above
  • the processing unit 1420 is used to perform the operation in the method embodiment above Operations processed internally by the first terminal.
  • the transceiving unit 1410 is configured to send first indication information to the second terminal, where the first indication information indicates that the first channel occupancy time includes a first physical layer side link feedback channel PSFCH resource, and the transceiving unit 1410 It is also used to receive feedback information from the second terminal on the first PSFCH resource.
  • the transceiving unit 1410 is configured to send first indication information to the second terminal, where the first indication information indicates the resource corresponding to the first channel occupation time, and the transceiving unit 1410 is also configured to send the first indication information to the second terminal.
  • the resource corresponding to the channel occupation time receives the feedback information from the second terminal.
  • the transceiver unit 1410 is specifically configured to receive the first hybrid automatic repeat request (HARQ) information from the second terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first data is the For the data sent to the second terminal within the second channel occupation time, the first channel occupation time is after the second channel occupation time.
  • HARQ hybrid automatic repeat request
  • the resource corresponding to the first channel occupation time or the first channel occupation time includes the first PSFCH resource Indicate to the second terminal (data receiving end), so that the second terminal sends feedback information on the resource corresponding to the indicated first channel occupancy time, or on the first PSFCH resource determined by a predefined rule.
  • this solution can reduce the possibility of the second terminal failing to compete and improve the accuracy of data transmission.
  • the transceiving unit 1410 is specifically configured to receive first HARQ information and second HARQ information from the second terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first The data is data sent by the first terminal to the second terminal within the second channel occupation time, the second HARQ information is feedback to the second data, and the second data is sent by the first terminal to the second terminal within the first channel occupation time data.
  • the transceiving unit 1410 is further configured to send second indication information to the second terminal, where the second indication information indicates information of the first data corresponding to the first HARQ information.
  • the information of the first data includes a first PSSCH source identifier and/or a destination identifier.
  • the processing unit 1420 is configured to determine the time domain resource of the first PSFCH resource based on the index of the starting time unit of the first PSFCH resource and/or the number of time units occupied by the first PSFCH resource.
  • the transceiving unit 1410 is further configured to send third indication information to the second terminal, where the third indication information indicates the index of the start time unit of the first PSFCH resource and/or the time occupied by the first PSFCH resource the number of units.
  • the processing unit 1420 is further configured to determine the frequency domain of the first PSFCH resource based on the index of the starting frequency domain unit of the first PSFCH resource and/or the number of frequency domain units occupied by the first PSFCH resource resource.
  • the transceiving unit 1410 is further configured to send fourth indication information to the second terminal, where the fourth indication information indicates the index of the starting frequency domain unit of the first PSFCH resource and/or the number of times occupied by the first PSFCH resource. The number of frequency domain units.
  • the processing unit 1420 is further configured to determine the frequency domain resource of the first PSFCH resource based on the time domain position of the first data within the second channel occupation time.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit included in the time unit where the first PSFCH resource is located.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit where the PSFCH resource in the PSFCH resource set is located
  • the PSFCH resource set is the PSFCH resource on the time unit where the first PSFCH resource is located
  • the set of PSFCH resources in the PSFCH resource set, the frequency domain resources of the PSFCH resources in the PSFCH resource set are based on the bitmap, at least one of the starting PSFCH resource of the PSFCH resource set and the interval is determined, and the interval is the frequency domain unit between adjacent PSFCH resources in the PSFCH resource set interval.
  • the above bitmap, the starting PSFCH resource of the PSFCH resource set, and the interval may be determined by means of predefinition, preconfiguration, or network device configuration.
  • At least one of the first indication information, the second indication information, the third indication information and the fourth indication information is carried in the side link control information SCI, and the SCI is transmitted within the first channel occupation time .
  • the communication device 1400 may be a component configured in the first terminal, for example, a chip in the first terminal.
  • the transceiver unit 1410 may be an interface circuit, a pin, and the like.
  • the interface circuit may include an input circuit and an output circuit
  • the processing unit 1420 may include a processing circuit.
  • the transceiver unit 1410 may also be a radio frequency module.
  • the processing unit 1420 may be a baseband module.
  • the radio frequency module is mainly used for transmitting and receiving radio frequency signals and the conversion of radio frequency signals and baseband signals; the baseband module is mainly used for baseband processing and controlling the base station.
  • Fig. 15 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • the communication device 1500 includes a transceiver unit 1510 and a processing unit 1520 .
  • the transceiver unit 1510 can communicate with the outside, and the processing unit 1520 is used for data processing.
  • the transceiver unit 1510 may also be called a communication interface or a communication unit.
  • the communication device 1500 may further include a storage unit, which may be used to store instructions and/or data, and the processing unit 1520 may read instructions or and/or data in the storage unit.
  • a storage unit which may be used to store instructions and/or data
  • the processing unit 1520 may read instructions or and/or data in the storage unit.
  • the communication device 1500 is a second terminal
  • the transceiver unit 1510 is used to perform the receiving or sending operation of the second terminal in the method embodiment above
  • the processing unit 1520 is used to perform the operation in the method embodiment above Operations handled internally by the second terminal.
  • the transceiving unit 1510 is configured to receive first indication information from the first terminal, the first indication information indicating that the first channel occupancy time includes the first PSFCH resource, and the transceiving unit 1510 is also configured to set the first PSFCH resource on the first PSFCH The resource sends feedback information to the first terminal.
  • the transceiving unit 1510 is configured to receive first indication information from the first terminal, the first indication information indicating the resource corresponding to the occupation time of the first channel, and the transceiving unit 1510 is also configured to receive the first indication information on the first channel
  • the resources corresponding to the occupation time are used to send feedback information to the first terminal.
  • the resource corresponding to the first channel occupation time or the first channel occupation time includes the first PSFCH resource Indicate to the second terminal (data receiving end), so that the second terminal sends feedback information on the resource corresponding to the indicated first channel occupancy time, or on the first PSFCH resource determined by a predefined rule.
  • this solution can reduce the possibility of the second terminal failing to compete and improve the accuracy of data transmission.
  • the transceiving unit 1510 is specifically configured to send first HARQ information to the first terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first data is the For the data received from the first terminal within two channel occupation times, the first channel occupation time is after the second channel occupation time.
  • the transceiver unit 1510 is specifically configured to send the first HARQ information and the second HARQ information to the first terminal on the first PSFCH resource, the first HARQ information is feedback to the first data, and the first data is The second terminal receives the data from the first terminal within the second channel occupation time, the second HARQ information is the feedback to the second data, and the second data is the data received by the second terminal within the first channel occupation time from the The data of the first terminal.
  • the transceiving unit 1510 is further configured to receive second indication information from the first terminal, where the second indication information indicates information about the first data corresponding to the first HARQ information, and the processing unit is configured to, according to the second The instruction information controls the transceiving unit to send the first HARQ information to the first terminal on the first PSFCH resource.
  • the information of the first data includes a PSSCH source identifier and/or a destination identifier
  • the processing unit 1520 is specifically configured to determine the first data according to the PSSCH source identifier and/or destination identifier, and control the transceiver unit 1510 to The first PSFCH resource sends the first HARQ information corresponding to the first data to the first terminal.
  • the processing unit 1520 is further configured to determine the time domain resource of the first PSFCH resource based on the index of the starting time unit of the first PSFCH and/or the number of time units occupied by the first PSFCH resource.
  • the transceiving unit 1510 is further configured to receive third indication information from the first terminal, where the third indication information indicates the index of the start time unit of the first PSFCH resource and/or the time period occupied by the first PSFCH resource. The number of time units.
  • the processing unit 1520 is further configured to determine the frequency domain of the first PSFCH resource based on the index of the starting frequency domain unit of the first PSFCH resource and/or the number of frequency domain units occupied by the first PSFCH resource resource.
  • the transceiving unit 1510 is also configured to receive fourth indication information from the first terminal, where the fourth indication information indicates the index of the starting frequency domain unit of the first PSFCH resource and/or the occupation of the first PSFCH resource The number of frequency domain units of .
  • the processing unit 1520 is further configured to determine the frequency domain resource of the first PSFCH resource based on the time domain position of the first data within the second channel occupation time.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit included in the time unit where the first PSFCH resource is located.
  • the index of the starting frequency domain unit of the first PSFCH resource is the index of the frequency domain unit where the PSFCH resource in the PSFCH resource set is located
  • the PSFCH resource set is the PSFCH resource on the time unit where the first PSFCH resource is located
  • the set of PSFCH resources in the PSFCH resource set, the frequency domain resources of the PSFCH resources in the PSFCH resource set are based on the bitmap, at least one of the starting PSFCH resource of the PSFCH resource set and the interval is determined, and the interval is the frequency domain unit between adjacent PSFCH resources in the PSFCH resource set interval.
  • the above bitmap, the starting PSFCH resource of the PSFCH resource set, and the interval may be determined by means of predefinition, preconfiguration, or network device configuration.
  • At least one of the first indication information, the second indication information, the third indication information, and the fourth indication information is carried in an SCI, and the SCI is transmitted within the first channel occupation time.
  • the communication device 1500 may be a component configured in the second terminal, for example, a chip in the second terminal.
  • the transceiver unit 1510 may be an interface circuit, a pin, and the like.
  • the interface circuit may include an input circuit and an output circuit
  • the processing unit 1520 may include a processing circuit.
  • the transceiver unit 1510 may also be a radio frequency module.
  • the processing unit 1520 may be a baseband module.
  • the radio frequency module is mainly used for transmitting and receiving radio frequency signals and the conversion of radio frequency signals and baseband signals; the baseband module is mainly used for baseband processing and controlling the base station.
  • FIG. 16 shows a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device 1600 may be applicable to the system shown in FIG. 1(a), 1(b), or 1(c).
  • the terminal device 1600 may be the first terminal or the second terminal in the implementation of the method.
  • FIG. 16 only shows main components of the terminal device 1600 .
  • a terminal device 1600 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the transceiver 1630 is used to perform the receiving or sending operation of the first terminal or the second terminal in the method embodiment above
  • the processor 1610 is used to perform the internal processing operation of the first terminal or the second terminal in the method embodiment above.
  • the processor is mainly used to process communication protocols and communication data, control the entire terminal device 1600, execute software programs, and process data of the software programs.
  • Memory is primarily used to store software programs and data.
  • the control circuit is mainly used for conversion of baseband signal and radio frequency signal and processing of radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, microphones, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the control circuit, and the control circuit performs radio frequency processing on the baseband signal, and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the control circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data .
  • FIG. 16 only shows one processor 1610, one memory 1620, and one transceiver 1630 (the dotted line box indicates that the transceiver is optional).
  • terminal device 1600 may include multiple processors and memories.
  • a storage may also be called a storage medium or a storage device, which is not limited in this embodiment of the present invention.
  • the processor may include a baseband processor and a central processing unit, the baseband processor is mainly used to process communication protocols and communication data, and the central processor is mainly used to control the entire terminal device 1600, Executing the software program, processing the data of the software program.
  • the processor in FIG. 16 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit can also be independent processors, interconnected through technologies such as a bus.
  • the terminal device 1600 may include multiple baseband processors to adapt to different network standards, the terminal device 1600 may include multiple central processors to enhance its processing capability, and various components of the terminal device 1600 may be connected through various buses.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit may also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and the control circuit having the function of transmitting and receiving can be regarded as the transmitting and receiving unit of the terminal device 1600
  • the processor having the function of processing can be regarded as the processing unit of the terminal device 1600
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, and the like.
  • the device used to implement the receiving function in the transceiver unit can be regarded as a receiving unit
  • the device used to implement the sending function in the transceiver unit can be regarded as a sending unit, that is, the transceiver unit includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, receiver, receiving circuit, etc.
  • the sending unit may be called a transmitter, transmitter, or transmitting circuit, etc.
  • the embodiment of the present application further provides a computer-readable storage medium, on which computer instructions for implementing the method executed by the first terminal or the second terminal in the above method embodiment are stored.
  • the computer when the computer program is executed by a computer, the computer can implement the methods performed by the first terminal or the second terminal in the above method embodiments.
  • the embodiment of the present application also provides a computer program product including an instruction, and when the instruction is executed by a computer, the computer implements the method executed by the first terminal or the second terminal in the above method embodiment.
  • An embodiment of the present application further provides a communication system, where the communication system includes the first terminal and the second terminal in the foregoing embodiments.
  • the communication system includes a first terminal and multiple second terminals.
  • the first terminal or the second terminal may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer may include hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and memory (also called main memory).
  • the operating system of the operating system layer can be any one or more computer operating systems that realize business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer may include applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application, as long as the program that records the code of the method provided in the embodiment of the present application can be executed according to the method provided in the embodiment of the present application Just communicate.
  • the execution subject of the method provided by the embodiment of the present application may be the first terminal or the second terminal, or a functional module in the first terminal or the second terminal that can call a program and execute the program.
  • a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device can be components.
  • One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more packets of data (e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems). Communicate through local and/or remote processes.
  • packets of data e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division.
  • the units described as separate components may or may not be physically separated.
  • the components shown may or may not be physical units, that is, they may be located in one place, or they may be distributed over multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • the functions described above are realized in the form of software function 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 prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned computer-readable storage medium may be any available medium that can be accessed by a computer.
  • the computer readable medium may include random access memory (random access memory, RAM), read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), Erasable programmable read-only memory (erasable PROM, EPROM), electrically erasable programmable read-only memory (electrically erasable programmable read only memory, EEPROM), compact disc read-only memory (compact disc read-only memory, CD- ROM), universal serial bus flash disk (universal serial bus flash disk), removable hard disk, or other optical disk storage, magnetic disk storage medium, or other magnetic storage device, or can be used to carry or store desired data in the form of instructions or data structures program code and any other medium that can be accessed by a computer.
  • RAM random access memory
  • read-only memory read-only memory
  • ROM programmable read-only memory
  • PROM programmable read-only memory
  • Erasable programmable read-only memory Erasable programmable read-only memory
  • EPROM Er
  • RAM static random access memory
  • dynamic RAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • enhanced SDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous connection dynamic random access memory
  • direct rambus RAM direct rambus RAM

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Abstract

本申请提供了一种侧行链路反馈信息传输的方法和通信装置。该方法包括：第一终端向第二终端发送第一指示信息，第一指示信息指示第一信道占用时间包括第一物理层侧链路反馈信道PSFCH资源，第一终端在该第一PSFCH资源接收来自第二终端的反馈信息。本申请中第二终端通过第一终端竞争的资源发送反馈信息，相对于第二终端自己竞争资源发送反馈信息的方案而言，能够减少第二终端竞争失败的可能性，提高数据传输的准确性。

Description

侧行链路反馈信息传输的方法和通信装置
本申请要求于2021年6月30日提交中国专利局、申请号为202110736163.6、申请名称为“侧行链路反馈信息传输的方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且，更具体地，涉及侧行链路反馈信息传输的方法和通信装置。
背景技术
在无线通信系统的演变过程中，频谱一直是无线通信中的重要发展方向之一。在4G长期演进(long term evolution，LTE)系统中，蜂窝移动通信对非授权频段的研究工作中，催生了非授权频段下的LTE(LTE in unlicensed spectrum，LTE-U)、授权辅助接入(licensed assisted access，LAA)、多LTE火(MulteFire)等技术。并且第三代合作伙伴计划(3rd generation partnership project，3GPP)对LAA进行了标准化，令LTE系统有能力基于先听后说(listen-before-talk，LBT)机制与无线通信技术(Wi-Fi)设备共存，使得LTE可以在非授权频段上通信。在新无线(new radio，NR)系统中，非授权频段中的NR协议技术统称为NR-U。
用户设备(user equipment，UE)在通信过程中除了Uu接口外，还存在一种PC5接口，PC5接口是UE与UE间的通信接口，PC5接口中的传输链路被定义为侧行链路(sidelink，SL)。在局域空间内使能非授权频段的SL通信是一个重要演进方向，相应协议技术可以统称为SL-U。与NR-U类似，通过SL-U工作的UE也需要基于LBT机制与附近的Wi-Fi设备共存。
目前标准中讨论了Uu接口的通信与LBT机制的融合，没有涉及PC5接口的通信与LBT机制的融合。如何基于LBT机制，使用PC5接口在非授权频段中通信是亟待解决的问题。
发明内容
本申请提供一种侧行链路反馈信息传输的方法和装置，能够减小接收终端竞争资源失败的可能性，提高数据传输的准确性。
第一方面，提供了一种侧行链路反馈信息传输的方法。该方法可以由第一终端执行，或者，也可以由配置于第一终端中的芯片或电路执行，本申请对此不作限定。该方法包括：第一终端向第二终端发送第一指示信息，该第一指示信息指示第一信道占用时间包括第一物理层侧链路反馈信道PSFCH资源，第一终端在该第一PSFCH资源接收来自第二终端的反馈信息。或者，第一终端向第二终端发送第一指示信息，该第一指示信息指示第一信道 占用时间对应的资源，第一终端在该第一信道占用时间对应的资源接收来自第二终端的反馈信息。
基于上述方案，当数据的发送端(第一终端)基于LBT机制抢占到第一信道占用时间对应的资源后，将第一信道占用时间对应的资源或者将第一信道占用时间包括第一PSFCH资源指示给第二终端(数据的接收端)，从而使得第二终端在指示的第一信道占用时间对应的资源，或者通过预定义的规则确定的第一PSFCH资源上发送反馈信息。该方案相对于第二终端自己竞争资源发送反馈信息的方案而言，能够减少第二终端竞争失败的可能性，提高数据传输的准确性。
一种可能的实施方式，第一终端在第一PSFCH资源接收来自第二终端的第一混合式自动重传请求HARQ信息，该第一HARQ信息是对第一数据的反馈，第一数据为第一终端在第二信道占用时间内向第二终端发送的数据，第一信道占用时间在第二信道占用时间之后。
基于上述方案，第一终端可以通过LBT机制抢占到第一信道占用时间对应的资源，用于传输之前在第二信道占用时间内没有反馈HARQ信息的数据所对应的HARQ信息，能够使得在第二信道占用时间内来不及反馈HARQ信息的数据得以反馈，避免第一终端因接收不到反馈信息，进而重传数据，采用该方案在一定程度上能够节省资源。
一种可能的实施方式，第一终端在第一PSFCH资源接收来自第二终端的第一HARQ信息和第二HARQ信息，该第一HARQ信息是对第一数据的反馈，第一数据为第一终端在第二信道占用时间内向第二终端发送的数据，第二HARQ信息是对第二数据的反馈，第二数据为第一终端在第一信道占用时间内向第二终端发送的数据。
基于上述方案，第一终端可以通过LBT机制抢占到第一信道占用时间对应的资源，用于传输数据和反馈信息。应理解，该方案中第一终端抢占资源是用于传输数据的，同时第一终端可在抢占的资源上接收之前在第二信道占用时间内没有反馈HARQ信息的数据所对应的HARQ信息，弥补了某些场景下第二信道占用时间内的数据在第二信道占用时间内没有反馈的缺陷，完善了数据传输过程的反馈机制。
一种可能的实施方式，第一终端向第二终端发送第二指示信息，第二指示信息指示第一HARQ信息对应的第一数据的信息。
一种可能的实施方式，该第一数据的信息包括第一PSSCH源标识和/或目的标识。
基于上述方案，当第一终端向多个接收终端发送的多个数据没有得到反馈时，第一终端向接收终端发送没有反馈HARQ信息的数据的具体信息，使得第二终端可以根据该具体信息识别出需要反馈的数据，从而准确的反馈HARQ信息。
一种可能的实施方式，第一PSFCH资源的时域资源基于第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数确定。
基于上述方案，第一PSFCH资源的时域资源可基于预定义或预配置的方式确定，该方式在一定程度上节省了信令开销。
一种可能的实施方式，第一终端向第二终端发送第三指示信息，第三指示信息指示第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数。
基于上述方案，第一PSFCH资源的时域资源通过指示信息确定，该方式相对于预定义或预配置的方式而言，更加灵活。
一种可能的实施方式，第一PSFCH资源的频域资源基于第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数确定。
基于上述方案，第一PSFCH资源的频域资源可基于预定义或预配置的方式确定，该方式在一定程度上节省了信令开销。
一种可能的实施方式，第一终端向第二终端发送第四指示信息，第四指示信息指示第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数。
基于上述方案，第一PSFCH资源的频域资源通过指示信息确定，该方式相对于预定义或预配置的方式而言，更加灵活。
一种可能的实施方式，第一PSFCH资源的频域资源基于第一数据在第二信道占用时间内所在的时域位置确定。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为第一PSFCH资源所在时间单元上包括的频域单元的索引。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为PSFCH资源集合中的PSFCH资源所在的频域单元的索引，PSFCH资源集合为第一PSFCH资源所在时间单元上的PSFCH资源的集合，PSFCH资源集合中的PSFCH资源的频域资源基于位图，PSFCH资源集合的起始PSFCH资源和间隔中的至少一个确定，间隔为PSFCH资源集合中相邻PSFCH资源之间的频域单元间隔。
一种可能的实施方式，上述位图，PSFCH资源集合的起始PSFCH资源，和间隔可通过预定义，预配置，或网络设备配置的方式确定。
一种可能的实施方式，第一指示信息，第二指示信息，第三指示信息和第四指示信息中的至少一个承载于侧链路控制信息SCI中，该SCI在第一信道占用时间内传输。
第二方面，提供了一种侧行链路反馈信息传输的方法。该方法可以由第二终端执行，或者，也可以由配置于第二终端中的芯片或电路执行，本申请对此不作限定。该方法包括：第二终端接收来自第一终端的第一指示信息，第一指示信息指示第一信道占用时间包括第一PSFCH资源，第二终端在第一PSFCH资源向第一终端发送反馈信息。或者，第二终端接收来自第一终端的第一指示信息，第一指示信息指示第一信道占用时间对应的资源，第二终端在第一信道占用时间对应的资源向第一终端发送反馈信息。
基于上述方案，当数据的发送端(第一终端)基于LBT机制抢占到第一信道占用时间对应的资源后，将第一信道占用时间对应的资源或者将第一信道占用时间包括第一PSFCH资源指示给第二终端(数据的接收端)，从而使得第二终端在指示的第一信道占用时间对应的资源，或者通过预定义的规则确定的第一PSFCH资源上发送反馈信息。该方案相对于第二终端自己竞争资源发送反馈信息的方案而言，能够减少第二终端竞争失败的可能性，提高数据传输的准确性。
一种可能的实施方式，第二终端在第一PSFCH资源向第一终端发送第一HARQ信息，第一HARQ信息是对第一数据的反馈，第一数据为第二终端在第二信道占用时间内接收到的来自第一终端的数据，第一信道占用时间在第二信道占用时间之后。
基于上述方案，第一终端可以通过LBT机制抢占到第一信道占用时间对应的资源，用于传输之前在第二信道占用时间内没有反馈HARQ信息的数据所对应的HARQ信息，能够使得在第二信道占用时间内来不及反馈HARQ信息的数据得以反馈，避免第一终端 因接收不到反馈信息，进而重传数据，采用该方案在一定程度上能够节省资源。
一种可能的实施方式，第二终端在第一PSFCH资源向第一终端发送第一HARQ信息和第二HARQ信息，第一HARQ信息是对第一数据的反馈，第一数据为第二终端在第二信道占用时间内接收到的来自第一终端的数据，第二HARQ信息是对第二数据的反馈，第二数据为第二终端在第一信道占用时间内接收到的来自第一终端的数据。
基于上述方案，第一终端可以通过LBT机制抢占到第一信道占用时间对应的资源，用于传输数据和反馈信息。应理解，该方案中第一终端抢占资源是用于传输数据的，同时第二终端可在抢占的资源上发送之前在第二信道占用时间内没有反馈HARQ信息的数据所对应的HARQ信息，弥补了某些场景下第二信道占用时间内的数据在第二信道占用时间内没有反馈的缺陷，完善了数据传输过程的反馈机制。
一种可能的实施方式，第二终端接收来自第一终端的第二指示信息，第二指示信息指示第一HARQ信息对应的第一数据的信息，第二终端根据第二指示信息在第一PSFCH资源向第一终端发送第一HARQ信息。
一种可能的实施方式，第一数据的信息包括PSSCH源标识和/或目的标识，第二终端根据PSSCH源标识和/或目的标识确定第一数据，并在第一PSFCH资源向第一终端发送第一数据对应的第一HARQ信息。
基于上述方案，当第一终端向多个接收终端发送的多个数据没有得到反馈时，第一终端向接收终端发送没有反馈HARQ信息的数据的具体信息，使得第二终端可以根据该具体信息识别出需要反馈的数据，从而准确的反馈HARQ信息。
一种可能的实施方式，第一PSFCH资源的时域资源基于第一PSFCH的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数确定。
基于上述方案，第一PSFCH资源的时域资源可基于预定义或预配置的方式确定，该方式在一定程度上节省了信令开销。
一种可能的实施方式，第二终端接收来自第一终端的第三指示信息，第三指示信息指示第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数。
基于上述方案，第一PSFCH资源的时域资源通过指示信息确定，该方式相对于预定义或预配置的方式而言，更加灵活。
一种可能的实施方式，第一PSFCH资源的频域资源基于第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数确定。
基于上述方案，第一PSFCH资源的频域资源可基于预定义或预配置的方式确定，该方式在一定程度上节省了信令开销。
一种可能的实施方式，第二终端接收来自第一终端的第四指示信息，第四指示信息指示第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数。
基于上述方案，第一PSFCH资源的频域资源通过指示信息确定，该方式相对于预定义或预配置的方式而言，更加灵活。
一种可能的实施方式，第一PSFCH资源的频域资源基于第一数据在第二信道占用时间内所在的时域位置确定。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为第一PSFCH资源所在时间单元上包括的频域单元的索引。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为PSFCH资源集合中的PSFCH资源所在的频域单元的索引，PSFCH资源集合为第一PSFCH资源所在时间单元上的PSFCH资源的集合，PSFCH资源集合中的PSFCH资源的频域资源基于位图，PSFCH资源集合的起始PSFCH资源和间隔中的至少一个确定，间隔为PSFCH资源集合中相邻PSFCH资源之间的频域单元间隔。
一种可能的实施方式，上述位图，PSFCH资源集合的起始PSFCH资源，和间隔可通过预定义，预配置，或网络设备配置的方式确定。
一种可能的实施方式，第一指示信息，第二指示信息，第三指示信息和第四指示信息中的至少一个承载于SCI中，所述SCI在所述第一信道占用时间内传输。
第三方面，提供了一种通信装置。该装置可以是第一终端，或者，也可以是配置于第一终端中的芯片或电路，本申请对此不作限定。该装置包括收发单元，该收发单元用于向第二终端发送第一指示信息，该第一指示信息指示第一信道占用时间包括第一物理层侧链路反馈信道PSFCH资源，该收发单元还用于在该第一PSFCH资源接收来自第二终端的反馈信息。或该收发单元用于向第二终端发送第一指示信息，该第一指示信息指示第一信道占用时间对应的资源，该收发单元还用于在该第一信道占用时间对应的资源接收来自第二终端的反馈信息。
基于上述方案，当数据的发送端(第一终端)基于LBT机制抢占到第一信道占用时间对应的资源后，将第一信道占用时间对应的资源或者将第一信道占用时间包括第一PSFCH资源指示给第二终端(数据的接收端)，从而使得第二终端在指示的第一信道占用时间对应的资源，或者通过预定义的规则确定的第一PSFCH资源上发送反馈信息。该方案相对于第二终端自己竞争资源发送反馈信息的方案而言，能够减少第二终端竞争失败的可能性，提高数据传输的准确性。
一种可能的实施方式，该收发单元具体用于在第一PSFCH资源接收来自第二终端的第一混合式自动重传请求HARQ信息，该第一HARQ信息是对第一数据的反馈，第一数据为第一终端在第二信道占用时间内向第二终端发送的数据，第一信道占用时间在第二信道占用时间之后。
基于上述方案，第一终端可以通过LBT机制抢占到第一信道占用时间对应的资源，用于传输之前在第二信道占用时间内没有反馈HARQ信息的数据所对应的HARQ信息，能够使得在第二信道占用时间内来不及反馈HARQ信息的数据得以反馈，避免第一终端因接收不到反馈信息，进而重传数据，采用该方案在一定程度上能够节省资源。
一种可能的实施方式，该收发单元具体用于在第一PSFCH资源接收来自第二终端的第一HARQ信息和第二HARQ信息，该第一HARQ信息是对第一数据的反馈，第一数据为第一终端在第二信道占用时间内向第二终端发送的数据，第二HARQ信息是对第二数据的反馈，第二数据为第一终端在第一信道占用时间内向第二终端发送的数据。
基于上述方案，第一终端可以通过LBT机制抢占到第一信道占用时间对应的资源，用于传输数据和反馈信息。应理解，该方案中第一终端抢占资源是用于传输数据的，同时第一终端可在抢占的资源上接收之前在第二信道占用时间内没有反馈HARQ信息的数据所对应的HARQ信息，弥补了某些场景下第二信道占用时间内的数据在第二信道占用时间内没有反馈的缺陷，完善了数据传输过程的反馈机制。
一种可能的实施方式，该收发单元还用于向第二终端发送第二指示信息，第二指示信息指示第一HARQ信息对应的第一数据的信息。
一种可能的实施方式，该第一数据的信息包括第一PSSCH源标识和/或目的标识。
一种可能的实施方式，该装置还包括处理单元，该处理单元用于基于第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数确定第一PSFCH资源的时域资源。
一种可能的实施方式，该收发单元还用于向第二终端发送第三指示信息，第三指示信息指示第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数。
一种可能的实施方式，该处理单元还用于基于第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数确定第一PSFCH资源的频域资源。
一种可能的实施方式，该收发单元还用于向第二终端发送第四指示信息，第四指示信息指示第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数。
一种可能的实施方式，该处理单元还用于基于第一数据在第二信道占用时间内所在的时域位置确定第一PSFCH资源的频域资源。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为第一PSFCH资源所在时间单元上包括的频域单元的索引。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为PSFCH资源集合中的PSFCH资源所在的频域单元的索引，PSFCH资源集合为第一PSFCH资源所在时间单元上的PSFCH资源的集合，PSFCH资源集合中的PSFCH资源的频域资源基于位图，PSFCH资源集合的起始PSFCH资源和间隔中的至少一个确定，间隔为PSFCH资源集合中相邻PSFCH资源之间的频域单元间隔。
一种可能的实施方式，上述位图，PSFCH资源集合的起始PSFCH资源，和间隔可通过预定义，预配置，或网络设备配置的方式确定。
一种可能的实施方式，第一指示信息，第二指示信息，第三指示信息和第四指示信息中的至少一个承载于侧链路控制信息SCI中，该SCI在第一信道占用时间内传输。
第四方面，提供了一种通信装置。该装置可以是第二终端，或者，也可以是配置于第二终端中的芯片或电路，本申请对此不作限定。该装置包括收发单元和处理单元，该收发单元用于接收来自第一终端的第一指示信息，第一指示信息指示第一信道占用时间包括第一PSFCH资源，该收发单元还用于在第一PSFCH资源向第一终端发送反馈信息。或者，该收发单元用于接收来自第一终端的第一指示信息，第一指示信息指示第一信道占用时间对应的资源，该收发单元还用于在第一信道占用时间对应的资源向第一终端发送反馈信息。
基于上述方案，当数据的发送端(第一终端)基于LBT机制抢占到第一信道占用时间对应的资源后，将第一信道占用时间对应的资源或者将第一信道占用时间包括第一PSFCH资源指示给第二终端(数据的接收端)，从而使得第二终端在指示的第一信道占用时间对应的资源，或者通过预定义的规则确定的第一PSFCH资源上发送反馈信息。该方案相对于第二终端自己竞争资源发送反馈信息的方案而言，能够减少第二终端竞争失败的可能性，提高数据传输的准确性。
一种可能的实施方式，该收发单元具体用于在第一PSFCH资源向第一终端发送第一HARQ信息，第一HARQ信息是对第一数据的反馈，第一数据为第二终端在第二信道占用时间内接收到的来自第一终端的数据，第一信道占用时间在第二信道占用时间之后。
基于上述方案，第一终端可以通过LBT机制抢占到第一信道占用时间对应的资源，用于传输之前在第二信道占用时间内没有反馈HARQ信息的数据所对应的HARQ信息，能够使得在第二信道占用时间内来不及反馈HARQ信息的数据得以反馈，避免第一终端因接收不到反馈信息，进而重传数据，采用该方案在一定程度上能够节省资源。
一种可能的实施方式，该收发单元具体用于在第一PSFCH资源向第一终端发送第一HARQ信息和第二HARQ信息，第一HARQ信息是对第一数据的反馈，第一数据为第二终端在第二信道占用时间内接收到的来自第一终端的数据，第二HARQ信息是对第二数据的反馈，第二数据为第二终端在第一信道占用时间内接收到的来自第一终端的数据。
基于上述方案，第一终端可以通过LBT机制抢占到第一信道占用时间对应的资源，用于传输数据和反馈信息。应理解，该方案中第一终端抢占资源是用于传输数据的，同时第二终端可在抢占的资源上发送之前在第二信道占用时间内没有反馈HARQ信息的数据所对应的HARQ信息，弥补了某些场景下第二信道占用时间内的数据在第二信道占用时间内没有反馈的缺陷，完善了数据传输过程的反馈机制。
一种可能的实施方式，该收发单元还用于接收来自第一终端的第二指示信息，第二指示信息指示第一HARQ信息对应的第一数据的信息，该处理单元用于根据第二指示信息控制该收发单元在第一PSFCH资源向第一终端发送第一HARQ信息。
一种可能的实施方式，第一数据的信息包括PSSCH源标识和/或目的标识，该处理单元具体用于根据PSSCH源标识和/或目的标识确定第一数据，并控制该收发单元在第一PSFCH资源向第一终端发送第一数据对应的第一HARQ信息。
一种可能的实施方式，该处理单元还用于基于第一PSFCH的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数确定第一PSFCH资源的时域资源。
一种可能的实施方式，该收发单元还用于接收来自第一终端的第三指示信息，第三指示信息指示第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数。
一种可能的实施方式，该处理单元还用于基于第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数确定第一PSFCH资源的频域资源。
一种可能的实施方式，该收发单元还用于接收来自第一终端的第四指示信息，第四指示信息指示第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数。
一种可能的实施方式，该处理单元还用于基于第一数据在第二信道占用时间内所在的时域位置确定第一PSFCH资源的频域资源。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为第一PSFCH资源所在时间单元上包括的频域单元的索引。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为PSFCH资源集合中的PSFCH资源所在的频域单元的索引，PSFCH资源集合为第一PSFCH资源所在时间单元上的PSFCH资源的集合，PSFCH资源集合中的PSFCH资源的频域资源基于位图， PSFCH资源集合的起始PSFCH资源和间隔中的至少一个确定，间隔为PSFCH资源集合中相邻PSFCH资源之间的频域单元间隔。
一种可能的实施方式，上述位图，PSFCH资源集合的起始PSFCH资源，和间隔可通过预定义，预配置，或网络设备配置的方式确定。
一种可能的实施方式，第一指示信息，第二指示信息，第三指示信息和第四指示信息中的至少一个承载于SCI中，所述SCI在所述第一信道占用时间内传输。
第五方面，提供一种通信装置，装置可以为上述第一方面中的第一终端，或者为配置在第一终端中的电子设备，或者为包括第一终端的较大设备。该装置用于执行上述第一方面提供的方法。该装置包括收发器。
可选地，该装置还包括处理器，该处理器与存储器耦合，可用于执行存储器中的指令，以实现上述第一方面以及第一方面中任一种可能实现方式中的方法。可选地，该装置还包括存储器，该存储器与处理器可能是分离部署的，也可能是集中部署的。可选地，该装置还包括通信接口，处理器与通信接口耦合。
在一种实现方式中，该通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该装置为配置于第一终端中的芯片。当该装置为配置于第一终端中的芯片时，该通信接口可以是该芯片或芯片系统上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。该处理器也可以体现为处理电路或逻辑电路。
可选地，该收发器可以为收发电路。可选地，所述输入/输出接口可以为输入/输出电路。
在具体实现过程中，上述处理器可以为一个或多个芯片，输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是但不限于接收器接收并输入的，输出电路所输出的信号可以是但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是同一电路，该电路在不同的时刻分别用作输入电路和输出电路。本申请实施例对处理器及各种电路的具体实现方式不做限定。
第六方面，提供一种通信装置，该装置可以为上述第二方面中的第二终端。该装置用于执行上述第二方面提供的方法。该装置包括收发器。
可选地，该装置还包括存储器，该处理器与存储器耦合，可用于执行存储器中的指令，以实现上述第二方面以及第二方面中任一种可能实现方式中的通信方法。可选地，该通信装置还包括存储器，该存储器与处理器可能是分离部署的，也可能是集中部署的。可选地，该装置还包括通信接口，处理器与通信接口耦合。
在一种实现方式中，该通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该装置为配置于第二终端中的芯片。当该装置为配置于第二终端中的芯片时，该通信接口可以是该芯片或芯片系统上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。该处理器也可以体现为处理电路或逻辑电路。
可选地，该收发器可以为收发电路。可选地，所述输入/输出接口可以为输入/输出电路。
在具体实现过程中，上述处理器可以为一个或多个芯片，输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。 输入电路所接收的输入的信号可以是但不限于接收器接收并输入的，输出电路所输出的信号可以是但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是同一电路，该电路在不同的时刻分别用作输入电路和输出电路。本申请实施例对处理器及各种电路的具体实现方式不做限定。
第七方面，提供了一种计算机程序产品，该计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当该计算机程序被运行时，使得计算机执行上述第一方面或第二方面以及第一方面或第二方面中任一种可能实现方式中的方法。
第八方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序(也可以称为代码，或指令)当其在计算机上运行时，使得计算机执行上述第一方面或第二方面以及第一方面或第二方面中任一种可能实现方式中的方法。
第九方面，提供了一种通信系统，包括上述的第一终端和第二终端。
附图说明
图1是适用于本申请实施例的通信系统100的示意图。
图2是本申请提供的FBE设备的LBT行为示意图。
图3是本申请提供的接收终端支持在PSFCH中反馈信息的示意图。
图4是本申请提供的PSFCH资源在时域上的配置示意图。
图5是本申请提供的PSFCH资源在频域上的配置示意图。
图6是本申请提供的通过码分的方式复用资源的示意图。
图7是本申请实施例提供的侧链路反馈信息传输的方法的流程示意图。
图8是本申请实施例提供的侧链路反馈信息传输的时域位置示意图。
图9是本申请实施例提供的PSFCH资源所在的时域位置示意图。
图10是本申请实施例提供的第一终端获得的频域位置示意图。
图11是本申请实施例提供的PSFCH资源所在的频域位置示意图。
图12是本申请实施例提供的在COT1内同时传输数据和HARQ信息的示意图。
图13是本申请实施例提供的在COT1内PSFCH资源的频域位置示意图。
图14是本申请实施例提供的第一终端的示意性框图。
图15是本申请实施例提供的第二终端的示意性框图。
图16是本申请实施例提供的终端设备的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
图1是适用于本申请实施例的通信系统100的示意图。
图1(a)所示的通信系统100包括网络设备10，终端设备20，和终端设备21，其中，终端设备20和终端设备21都在网络设备10的覆盖范围内，网络设备10和终端设备之间通过Uu空口通信，终端设备20和21间通过PC5接口通信。图1(b)所示的通信系统100包括网络设备10，终端设备20，和终端设备21，其中，终端设备20在网络设备10的覆盖范围内，终端设备21在网络设备10的覆盖范围之外。图1(c)所示的通信系统100包括网络设备10，终端设备20，和终端设备21，其中，终端设备20和终端设备21 都不在网络设备10的覆盖范围内。
应理解，图1中所示的终端设备和网络设备的数量仅为示例，本申请对通信系统中终端设备和网络设备的数量不作任何限制。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通信(global system formobile communications，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、LTE系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、第五代(5th generation，5G)系统或未来演进的通信系统，车到其它设备(vehicle-to-X V2X)，其中V2X可以包括车到互联网(vehicle to network，V2N)、车到车(vehicle to vehicle，V2V)、车到基础设施(vehicle to infrastructure，V2I)、车到行人(vehicle to pedestrian，V2P)等、车间通信长期演进技术(long term evolution-vehicle，LTE-V)、车联网、机器类通信(machine type communication，MTC)、物联网(Internet of things，IoT)、机器间通信长期演进技术(long term evolution-machine，LTE-M)，机器到机器(machine to machine，M2M)，设备到设备(deviceto device，D2D)等。
本申请实施例中的网络设备可以是任意一种具有无线收发功能的设备。该设备包括但不限于：演进型节点B(evolved node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(node B，NB)、无线网络控制器(radio network controller，RNC)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved nodeB，或home node B，HNB)、基带单元(base band unit，BBU)，无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为5G，如，NR，系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(base band unit，BBU)，或，分布式单元(distributed unit，DU)等。
例如，网络设备在传统通用移动通信系统(universal mobile telecommunications system，UMTS)/LTE无线通信系统中可以是传统宏基站，在异构网络(heterogeneous network,HetNet)场景下可以是微基站，在分布式基站场景可以是BBU和射频拉远单元(remote radio unit,RRU)，在云无线接入网(cloud radio access netowrk，CRAN)场景下可以是基带池(BBU pool)和RRU。
在一些部署中网络设备可以包括集中式单元(centralized unit，CU)和DU，或包括CU节点和DU节点的接入网(radio access network，RAN)设备。例如，在LTE系统中，包括CU节点和DU节点的RAN设备将LTE系统中eNB的协议层拆分开，部分协议层的功能放在CU集中控制，剩下部分或全部协议层的功能分布在DU中，由CU集中控制DU。gNB还可以包括有源天线单元(active antenna unit，简称AAU)。例如，在5G系统中，CU实现gNB的部分功能，DU实现gNB的部分功能。比如，CU负责处理非实时协议和 服务，实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+AAU发送的。可以理解的是，网络设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为RAN中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，本申请对此不做限定。
本申请实施例中的终端设备可以指用户设备、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、无线通信设备、用户代理或用户装置。本申请的实施例中的终端可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端、增强现实(augmented reality，AR)终端、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、可穿戴设备、车辆用户设备(vehicle user equipment，VUE)、车载设备、车载通信模块、其它嵌入式通信模块，5G网络中的终端或者未来演进网络中的终端等。
其中，可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
此外，终端设备还可以是物联网(internet of things，IoT)系统中的终端设备。IoT是未来信息技术发展的重要组成部分，其主要技术特点是将物品通过通信技术与网络连接，从而实现人机互连，物物互连的智能化网络。本申请对于终端设备的具体形式不作限定。
应理解，本申请实施例中，终端设备可以是用于实现终端设备功能的装置，也可以是能够支持终端设备实现该功能的装置，例如芯片系统，该装置可以被安装在终端中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。
在无线通信系统的演变过程中，逐渐开始了对非授权频段的研究工作，例如，出现了LTE-U、LAA、MulteFire等技术。其中，3GPP组织对LAA进行了标准化，并相继发展出了增强授权辅助接入(enhanced licensed assisted access，eLAA)和进一步增强授权辅助接入(further enhanced licensed assisted access，feLAA)技术，令LTE系统有能力基于LBT 机制与Wi-Fi设备共存，使能非授权频段上的LTE Uu接口通信。在5G NR系统中，非授权频段中的NR协议技术统称为NR-U，为提升NR-U对应的Uu接口通信性能，3GPP组织讨论了将Uu接口的帧结构与LBT机制融合的方法。
相应地，在局域空间内使能非授权频段的SL通信也是一个重要演进方向，对应的协议技术可以统称为SL-U。与Uu接口类似，通过SL-U工作的终端也需要基于LBT机制与附近的Wi-Fi设备共存。
LBT机制是一种基于随机退避(random back-off)的信道接入规则，即终端接入信道并开始发送数据之前需要侦听信道是否空闲(idle)，如果侦听到信道已经在一定时间内保持空闲则可以占用信道，如果侦听到信道非空闲则需要等待信道重新恢复为空闲后才可以占用信道。LBT机制是使用非授权频段的必选特性，因为世界各个地区对于非授权频段的使用有法规(regulation)要求。工作于不同通信协议的各种形态的终端，只有满足法规才能使用非授权频段，进而相对公平、高效地使用频谱资源。为了满足法规，3GPP组织将NR系统中的LBT机制划分为如下四类：
一类LBT(category 1 LBT)：通信设备在获得信道占用时间(channel occupancy time，COT)后，由接收状态经过一段短暂的转换间隔(switching gap)后立即进行数据的发送，简称Cat 1 LBT。COT指通信设备在成功接入信道后允许占用信道的时间，其中，转换间隔的时间不能大于16us。
二类LBT(category 2 LBT)：无随机退避的LBT，简称Cat 2 LBT，即通信设备在侦听到信道处于空闲状态并持续一段固定的时间后，不进行随机退避就可以进行发送数据。
三类LBT(category 3 LBT)：竞争窗口(contention window)的大小固定的随机退避的LBT，简称Cat 3 LBT，即通信设备基于固定大小的竞争窗口产生随机数N，并在侦听到信道处于空闲状态且持续一段根据随机数N确定的时间后可以进行发送数据。其中，竞争窗口的大小与N的最小值与最大值有关。
四类LBT(category 4 LBT)：竞争窗口的大小可变的随机退避的LBT，简称Cat 4 LBT，即通信设备基于可变大小的竞争窗口产生随机数N，并在侦听到信道处于空闲状态且持续一段根据随机数N确定的时间后可以进行发送数据。其中，竞争窗口的大小与N的最小值与最大值有关，该通信设备可以改变竞争窗口的大小。
下面介绍一下在NR-U协议中，NR-U设备遵循3GPP协议，采用LBT机制作为信道接入方法。其中，NR-U设备可以使用以下类型的LBT机制：
第一类：属于Cat 1 LBT机制，转换间隔不超过16us。在此类LBT机制中，NR-U设备不需要侦听信道，在COT内由接收状态经过至多16us的转换间隔后可以直接发送数据。
第二类：属于Cat 2 LBT机制，NR-U设备在侦听到信道处于空闲状态并持续16us后就可以接入信道并发送数据。
第三类：属于Cat 2 LBT机制，NR-U设备在侦听到信道处于空闲状态并持续25us后就可以接入信道并发送数据。
第四类：属于Cat 4 LBT机制，NR-U设备需要通过大小可变的竞争窗口进行随机退避后才能接入信道并发送数据。
当NR-U设备和WiFi共存时，从执行LBT机制的设备类型角度，分为基于负载的设备(load based equipment，LBE)和基于帧的设备(frame based equipment，FBE)。其中：
LBE在任意时间点都可以进行信道侦听和竞争接入，不需要考虑帧边界；
FBE仅允许在系统内同步的帧边界上通过信道的竞争接入取得COT，此处的“帧”表示固定帧周期(fixed frame period，FFP)，具体周期值由RRC信令配置，例如周期值可以为1ms、2ms、2.5ms、4ms、5ms和10ms，均可以整除2个无线帧的持续时间(20ms)。
图2为本申请提供的FBE设备的LBT行为示意图。其中，网络设备可以为gNB，gNB在每个FFP前通过信道的竞争接入取得COT并在COT内发送下行(downlink，DL)数据，第一终端和第二终端分别与gNB通信，第一终端和第二终端无需获取COT，而是在gNB获取的COT内通过信道竞争向gNB发送上行(uplink，UL)数据。
下面介绍一下NR系统中SL的资源分配模式以及数据传输方式。
SL的资源分配模式：
模式1：基站分配资源模式，主要应用于有网络覆盖的情形下的SL通信，基站统一根据终端的缓存状态报告(buffer state report，BSR)上报情况，集中进行资源分配。资源的分配可以为动态模式或预配置模式，基站分配的资源包括初始资源和/或重传资源。
模式2：用户自选资源模式，发送终端的传输资源不依赖于基站，终端自己选择传输资源进行通信。该模式不受限于网络覆盖，在没有网络覆盖情况下，发送终端也可以用该模式进行通信。用户自选的资源包括初始资源和/或重传资源。在模式2下，终端基于感知来避免所选择的资源相互碰撞。具体地，终端设备在感知窗口(sensing window)内，通过解析来自其他终端设备的侧行链路控制信息(sidelink control information，SCI)、测量参考信号接收功率(reference signal received power，RSRP)等进行感知，进一步地，终端设备在选择窗口(selection window)内基于感知结果排除已经被预约的(reserved)或者可能被预约的资源，选择自身传输所使用的资源。
SL数据传输方式：
示例地，在NR-V2X中提出一种侧行链路混合式自动重传请求(hybrid automatic repeat request，HARQ)的重传方案。具体的，接收终端会根据数据的译码情况向发送终端反馈HARQ信息，例如，当接收终端正确译码物理层侧行链路共享信道(physical sidelink shared channel，PSSCH)中传输的数据时，反馈ACK，当接收端不能正确译码PSSCH中传输的数据时，反馈NACK。接收终端是否支持在物理层侧行链路反馈信道(physical sidelink feedback channel，PSFCH)中反馈信息取决于资源池的配置以及侧行链路控制信息(sidelink control information，SCI)中的HARQ feedback enabled/disabled indicator字段。发送终端可以通过SCI中的频域资源分配字段"Frequency resource assignment"和时域资源分配字段"Time resource assignment"对重传资源进行预约。
图3为本申请提供的接收终端支持在PSFCH中反馈信息的示意图。其中R1，R2和R3是发送终端在t m，t m+t1，t m+t2发送给接收终端的数据，R1和R2之间的HARQ信息用于反馈数据R1的译码情况，R2和R3之间的HARQ信息用于反馈数据R2的译码情况，HARQ信息承载于PSFCH中。R1和R2以及R2和R3之间的时域距离需大于PSFCH所需要的最小处理时间(或PSFCH间隔)。
其中，PSFCH资源由PSSCH和/或物理层侧行链路控制信道(physical sidelink control channel，PSCCH)占用的时频资源和高层参数确定。高层参数包括PSFCH的周期(periodPSFCHresource)，PSSCH资源与PSFCH资源之间的最小间隔 (MinTimeGapPSFCH)，资源池配置的PSFCH RB资源(sl-PSFCH-RB-Set-r16)，资源池包括的子信道个数(numSubchannel)。
图4为本申请提供的PSFCH资源在时域上的配置示意图。其中，PSFCH的周期为相邻的PSFCH资源之间的时间间隔，在图4中，PSFCH的周期为4个时隙，PSSCH与PSFCH之间最小间隔为2个时隙，即时隙1-4上传输的数据在时隙6中的PSFCH资源中反馈信息，时隙5-8上传输的数据在时隙10中的PSFCH资源中反馈信息。具体地，例如，在每一个承载PSFCH的时隙的倒数第二个符号用作反馈信息传输。自动增益控制(automatic gains control，AGC)用于调整接收功率，间隔GAP用于收发转换，AGC和GAP各占用一个符号。
图5为本申请提供的PSFCH资源在频域上的配置示意图。如图5所示，假设资源池包括的子信道个数numSubchannel＝2，一个子信道包括10个RB，则PSFCH所在的符号上共包括20个RB,资源池配置的PSFCH RB资源通过高层参数sl-PSFCH-RB-Set-r16指示，sl-PSFCH-RB-Set-r16的具体指示方式可以通过位图(bitmap)，例如sl-PSFCH-RB-Set-r16为包括20个比特1111111111111110000的bitmap，则PSFCH RB的个数NF＝16，对应上述20个RB中的第一个RB至第16个RB。
图6是本申请提供的通过码分的方式复用资源的示意图。当多个接收终端需要在同一个PSFCH资源上发送反馈信息时，可采用码分的方式，具体的序列由发送终端的标识(identifier，ID)和接收终端的ID确定。例如，图6所示，sl-PSFCH-RB-Set-r16指示的PSFCH RB的个数NF＝16，资源池包括的子信道个数numSubchannel＝2，PSFCH的周期＝4，一个子信道对应的PSFCH资源占用的RB数量为2，即16/(2*4)＝2。其中，PSFCH资源0和1对应PSSCH0资源，PSFCH资源4和5对应PSSCH2资源，PSFCH资源10和11对应PSSCH5资源，且PSSCH5资源有多个接收终端发送反馈信息，此时需通过码分的方式，PSSCH5资源中承载的多个序列由发送终端的ID和接收终端的ID确定，图6中所示的循环移位对的最大数量(numMaxCSPair)为6。
当PSFCH资源基于PSSCH和/或PSCCH传输占用的时频资源和高层参数确定时，因高层参数是预配置在资源池上的，即配置的高层参数确定后，PSFCH资源的位置也是确定的。而当SL在非授权频谱上传输时，所有的传输资源，包括PSFCH资源都需要通过LBT的竞争接入机制获取，因此固定的PSFCH配置方式不再匹配使用非授权频谱传输的需求。
一种可能的实施方式，发送终端成功竞争接入信道后，可以通过指示或者配置等方式在COT内确定PSFCH资源的时域位置，频域位置或码域序列。但是考虑到PSSCH中传输的数据需要译码时间，在PSFCH中反馈也需要准备时间，此类处理时延可能会导致在接近COT结束时的PSSCH中传输的数据来不及在此COT内进行反馈。
本申请提出一种侧链路反馈信息的方法，可以使得发送终端可以将之前未被反馈的HARQ信息得以反馈，并且发送终端可以支持为一个或多个接收终端竞争PSFCH资源，从而减小了一个或多个接收终端自己竞争PSFCH资源而导致的竞争失败的可能性，并能进一步提高数据传输的准确性。
图7为本申请实施例提供的侧链路反馈信息传输的方法的流程示意图。图7所示的方法200包括：
步骤210，第一终端向第二终端发送第一指示信息，该第一指示信息指示第一信道占用时间包括第一PSFCH资源，对应地，第二终端接收该第一指示信息。
可选地，在此之前，当第一终端竞争信道成功后，获取第二信道占用时间COT2。
示例地，图8是本申请实施例提供的侧链路反馈信息传输的时域位置示意图。如图8所示，COT2内包括10个时隙，第一终端可以在该10个时隙内对不同的接收终端进行数据传输，假设前7个时隙对应的HARQ信息可以在COT2内进行反馈，并且承载上述HARQ信息的PSFCH资源可以位于COT2内的最后一个时隙。靠近COT2结束处的时隙7，8，9上传输的数据分别对应接收UE-1,接收UE-2，接收UE-3，此时由于PSCCH和/或PSSCH中信息的译码处理时延等因素，接收UE-1,接收UE-2，接收UE-3对于时隙7，8，9上传输的数据的HARQ信息来不及在COT2内最后一个时隙的PSFCH资源反馈。此时，第一终端需要额外通过LBT来竞争信道，以获得资源，从而指示给数据的接收终端，使数据的接收终端反馈上述时隙7，8，9中传输的数据的HARQ信息。即第一终端通过LBT机制成功获取第一信道占用时间COT1，该COT1对应的资源包括第一PSFCH资源，并通过第一指示信息指示给接收终端。
一种可能的实施方式，第一终端向第二终端发送的第一指示信息包括标识字段，该标识字段指示COT1对应的资源包括第一PSFCH资源。
示例地，该标识字段可以是侧行链路控制信息(sidelink control information，SCI)中的预留字段或者其他字段，其中预留字段可以位于第一级SCI，其他字段可以位于第二级SCI。第二终端通过该标识字段可以识别出当前SCI中指示了COT1对应的资源包括第一PSFCH资源。例如，标识字段可以是1比特，通过1比特指示COT1对应的资源是否包括第一PSFCH资源，当该比特为0时，表示COT1对应的资源包括第一PSFCH资源，当该比特为1时，表示COT1对应的资源不包括第一PSFCH资源，或者当该比特为1时，表示COT1对应的资源包括第一PSFCH资源，当该比特为0时，表示COT1对应的资源不包括第一PSFCH资源，本申请对此不作任何限制。
步骤240，第二终端在第一PSFCH资源向第一终端发送反馈信息，对应的，第一终端接收该反馈信息。
可选地，第二终端在第一信道占用时间对应的资源向第一终端发送第一HARQ信息，第一HARQ信息是对第一数据的反馈，该第一数据为第二终端在第二信道占用时间内接收到的来自第一终端的数据，第一信道占用时间在第二信道占用时间之后。
可选地，方法200还包括：
步骤220，第一终端向第二终端发送第二指示信息，该第二指示信息指示第一HARQ信息对应的第一数据的信息，对应的，第二终端接收该第二指示信息。
示例地，第二指示信息包括PSSCH源标识(PSFCH Source ID)和/或目的标识(PSFCH Destination ID)，该PSSCH源标识和目的标识可用于确定第一HARQ信息对应的第一数据。
一种可能的实施方式，第二终端接收到该第二指示信息后，根据第二指示信息指示的PSSCH源标识和目的标识确定第一数据，在第一PSFCH资源向第一终端发送第一HARQ信息。
示例地，第二终端接收到该第二指示信息后，第二终端通过识别PSSCH源标识和/或 目的标识确定需对第二信道占用时间内传输的哪个数据进行反馈。假设第二终端通过识别PSSCH源标识和/或目的标识确定需对第一数据进行反馈，然后在第一PSFCH资源向第一终端发送第一HARQ信息。需对第一数据进行反馈的原因可包括以下几种：第二终端确定在第二信道占用时间内没有针对第一数据反馈第一HARQ信息，或者第二终端在第二信道占用时间内针对第一数据反馈的第一HARQ信息第一终端没有接收到，或者还有其他因素导致第二终端需在第一信道占用时间反馈第一HARQ信息。
具体地，对于发送终端(第一终端)而言，需在第二指示信息中将图8所示的时隙7，8，9这三次传输所对应的PSSCH源标识和/或目的标识都指示出来，这样时隙7，8，9所对应的接收端UE-1,UE-2，UE-3可根据该PSSCH源标识和/或目的标识判断自己需不需要反馈HARQ信息，以及判断需对哪个数据进行反馈。接收终端(第二终端)确定需反馈的数据后在第一PSFCH资源向第一终端发送第一HARQ信息以反馈。
可选地，第二指示信息指示PSSCH的HARQ进程数和/或新数据指示，该HARQ进程数和/或新数据指示可用于确定第一HARQ信息对应的第一数据。例如，HARQ进程数和/或新数据指示可以通过第二级SCI中的“PSFCH HARQ process number”和“PSFCH New data indicator”指示，应注意，上述“PSFCH Source ID”和“PSFCH Destination ID”字段是专门为了指示第一HARQ信息对应的第一数据，与现有技术中第二级SCI指示的“HARQ process number”和“New data indicator”字段不同，现有技术的“HARQ process number”和“New data indicator”字段是为了指示当前SCI对应的PSSCH。第二终端通过解析“PSFCH HARQ process number”和“PSFCH New data indicator”字段，并与之前在第二信道占用时间内接收到的PSSCH对应的“HARQ process number”和“New data indicator”相比较。如果“PSFCH HARQ process number”和“PSFCH New data indicator”字段与之前接收到某个PSSCH对应的“HARQ process number”和“New data indicator”相同，则可以确定需对第二信道占用时间内承载在该PSSCH上的数据进行反馈。
应理解，上述发送终端指数据的发送端，反馈信息(HARQ信息)的接收端，也就是本申请中的第一终端，接收终端指数据的接收端，反馈信息(HARQ信息)的发送端，也就是本申请中的第二终端，后文描述也以此类推。
还应理解，本申请中的第一终端可向一个或多个接收终端发送数据，本申请实施例中的第二终端是其中一个接收终端。
可选地，在第二终端发送第一HARQ信息之前，还需确定PSFCH资源的具体资源信息，该资源信息包括时域资源，频域资源和码域资源。具体可通过以下方式确定：
一种方式：PSFCH资源占用的时域资源，频域资源和码域资源是预定义的，或者是预配值，或网络设备配置的。
另一种方式：第一终端向第二终端发送指示信息指示PSFCH资源占用的时域资源，频域资源和码域资源。
下面分别介绍确定PSFCH资源占用的时域资源，频域资源和码域资源的方法。
1、PSFCH的时域资源
第一PSFCH资源的时域资源基于该第一PSFCH资源的起始时间单元的索引和/或该第一PSFCH资源占用的时间单元的个数确定。
一种可能的实施方式，可根据预定义，或预配值，或网络设备配置确定第一PSFCH 资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数。
示例地，预定义或预配值为预先在发送终端或接收终端两端配置好的，网络设备配置可通过在下行控制信息(downlink control information，DCI)，或无线资源控制(radio resource control，RRC)信令，或系统消息块(system information block，SIB)中承载资源配置信息，从而指示第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数。
另一种可能的实施方式，可选地，方法200包括步骤230，第一终端向第二终端发送第三指示信息，该第三指示信息指示第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数，对应的，第二终端接收该第三指示信息。
示例地，在上述两种可能的实施方式中，PSFCH资源在COT1内占用的时间单元(该时间单元可以是时隙或符号)，可以是第一指示信息所在时隙中的最后1至N个符号，或者PSFCH资源在COT1内占用的时间单元为第一指示信息所在时隙之后的一个时隙。具体地，可以通过PSFCH资源在COT1中的起始时隙或符号的索引，和/或PSFCH资源占用的时隙或符号个数确定PSFCH的具体时域位置。
图9是本申请实施例提供的PSFCH资源所在的时域位置示意图。
如图9所示，PSFCH资源与第一指示信息在同一时隙内，并且位于该时隙的最后一个符号。或者PSFCH资源与第一指示信息位于相邻的时隙，在这种情况下，PSFCH资源可以占用该时隙的全部或者部分符号。其中，第一指示信息与PSFCH资源之间的时域符号可以用于发送循环前缀扩展(cyclic prefix extension，CPE)，CPE的内容为第一指示信息的复制，目的是为了占用信道，因在使用非授权频谱时，如果信道空闲超过一定时间，信道会被其他设备所抢占。
应理解，上述图9对PSFCH资源与第一指示信息所在的时域位置的示意仅为举例，本申请对此不作任何限制。
又一种可能的实施方式，可根据预定义，或预配值，或网络设备配置确定第一PSFCH资源的起始时间单元的索引或第一PSFCH资源占用的时间单元的个数，没有通过预定义，或预配值，或网络设备配置的参数可通过指示信息指示。例如，通过预定义，或预配值，或网络设备配置确定第一PSFCH资源的起始时间单元的索引，通过指示信息确定第一PSFCH资源占用的时间单元的个数。或者通过预定义，或预配值，或网络设备配置确定第一PSFCH资源占用的时间单元的个数，通过指示信息确定第一PSFCH资源的起始时间单元的索引。
2、PSFCH的频域资源
一种可能的实施方式，可根据预定义，或预配值，或网络设备配置确定第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数。
示例地，预定义或预配值为预先在发送终端或接收终端两端配置好的，网络设备配置可通过在下行控制信息(downlink control information，DCI)，或无线资源控制(radio resource control，RRC)信令，或系统消息块(system information block，SIB)中承载资源配置信息，从而指示第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数。
另一种可能的实施方式，可选地，方法200包括步骤231，第一终端向第二终端发送 第四指示信息，该第四指示信息指示第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数，对应的，第二终端接收该第四指示信息。
示例地，上述两种可能的实施方式中，频域单元可以是子信道或RB，其中RB可以是基于交错(interlace)结构或者基于非交错结构，交织资源块为非授权通信系统中新引入的一种交织结构的资源分配类型。其详细描述可以参考相关技术中的描述，此处不再赘述。非交错结构表示按照自然顺序的排列的RB。
示例地，图10所示为第一终端获得的频域资源示意图。该频域资源的带宽为20兆赫兹(MHZ)，包括10个交织资源块。如图10所示，图中的横条纹资源构成一个交织资源块，即索引为{0,10,20,30,40,50,60,70,80,90,100}的横条纹资源构成一个交织资源块，竖条纹资源构成另一个交织资源块，即索引为{1,11,21,31,41,51,61,71,81,91,101}的竖条纹资源构成一个交织资源块。其中，每一个交织资源块都可以用于一个终端传输数据。例如，图中的横条纹资源构成的交织资源块可以用于一个终端设备传输数据，而图中的竖条纹资源构成的交织资源块可以用于另一个终端设备传输数据。
在此说明的是，图10示出的将20MHZ带宽的频域资源包括10个交织资源块仅是一种示例，也可以是包括其他数量的交织资源块，例如5个，本申请实施例对此不做限定。
第一PSFCH资源的频域资源可通过第一PSFCH资源所在时间单元上的起始子信道索引或者RB索引，以及占用的子信道或RB的数量确定。由于COT2内未反馈的数据可能对应多个接收终端，此时在COT1内可以包括多个PSFCH资源，即PSFCH资源集合，PSFCH资源集合是第一PSFCH资源所在时间单元上的PSFCH资源的集合，该PSFCH资源集合中包括第一PSFCH资源，其中第一PSFCH资源用于第二终端反馈第一HARQ信息，第二终端为多个接收端中的其中一个。应理解，PSFCH资源集合中除第一PSFCH资源外的其他PSFCH资源用于其他接收终端反馈HARQ信息。
可选地，PSFCH资源集合中的PSFCH资源的频域资源可基于位图(bitmap)，PSFCH资源集合的起始PSFCH资源和间隔中的至少一个确定，该间隔为PSFCH资源集合中相邻PSFCH资源之间的频域单元间隔。
示例地，第一PSFCH资源所在时间单元上包括N个频域单元，可通过位图的方式从N个频域单元中确定属于PSFCH资源集合的频域单元。例如，通过N个比特指示N个频域单元中属于PSFCH资源集合的频域单元，具体的，当N＝10时，N个比特可以为1100011000，即PSFCH资源集合包括10个频率单元中的第一个，第二个，第六个和第七个频率单元。或者可通过起始PSFCH资源所在的频域单元位置和/或频域单元间隔确定PSFCH资源集合中每一个PSFCH资源所在的频域单元位置。
可选地，上述位图，起始PSFCH资源所在频域位置或频域单元间隔可以是预定义的，或者是预配值，或网络设备配置的。同上，网络设备可通过DCI或RRC或SIB信息配置。
又一种可能的实施方式，可根据预定义，或预配值，或网络设备配置确定第一PSFCH资源的起始频域单元的索引或第一PSFCH资源占用的频域单元的个数，没有通过预定义，或预配值，或网络设备配置的参数可通过指示信息指示。例如，通过预定义，或预配值，或网络设备配置确定第一PSFCH资源的起始频域单元的索引，通过指示信息确定第一PSFCH资源占用的频域单元的个数。或者通过预定义，或预配值，或网络设备配置确定第一PSFCH资源占用的频域单元的个数，通过指示信息确定第一PSFCH资源的起始频域 单元的索引。
可选地，第一PSFCH资源的频域资源(例如第一PSFCH资源的起始频域单元的索引)基于第一数据在第二信道占用时间内所在的时域位置确定。
示例地，上述无论是预定义的，预配置的，还是指示信息指示的第一PSFCH资源的起始频域单元的索引可以是一个绝对位置的索引，也可以是一个相对位置的索引。绝对位置的索引指第一PSFCH资源的起始频域单元的索引为第一PSFCH资源所在时间单元上包括的频域单元的索引，例如，第一PSFCH资源所在的时间单元上一共包括10个子信道，第一PSFCH资源的起始频域单元的索引为3，即第一PSFCH资源的起始频域单元为索引是3的子信道。相对位置的索引指第一PSFCH资源的起始频域单元的索引为PSFCH资源集合中的PSFCH资源所在的频域单元的索引，例如第一PSFCH资源所在的时间单元上一共包括10个子信道，PSFCH资源占用5个子信道，第一PSFCH资源的起始频域单元的索引为3，即第一PSFCH资源的起始频域单元为PSFCH资源占用的5个子信道中的索引是3的子信道。
图11是本申请实施例提供的PSFCH资源所在的频域位置示意图。
如图11所示，PSFCH资源集合所在时间单元上包括的PSFCH资源的数量N＝10，起始PSFCH资源PSFCH0所在的RB或者子信道为i＝1,两个PSFCH资源之间的间隔为k＝1个RB或者子信道。
根据国家和地区对于使用非授权频段的法规要求，以5GHz频段为例，接入20MHz的一个信道，需要满足至少最小占用信道带宽(occupied channel bandwidth，OCB)的要求，才可以占用信道，一般最小OCB至少是正常带宽的80％。以20MHz为例，至少需要占用16MHz的带宽才可以抢占该20MHz信道。为了满足上述OCB的要求，所有接收端可以在公共的PSFCH资源上发送统一的HARQ信息。公共的PSFCH资源的位置可以是预定义的，或是预配值，或网络设备配置的(通过DCI或RRC或SIB信息承载该配置)。例如公共的PSFCH资源的位置可以是N个PSFCH资源中的第一个(PSFCH 0)和最后一个(PSFCH N)。
可选地，第一PSFCH资源的起始频域单元的索引基于第一数据在第二信道占用时间内所在的时域位置确定。
应理解，上述频域单元的索引和第一数据在第二信道占用时间内所在的时域位置的对应关系，可用于预定义，预配置等方式确定第一PSFCH资源的方案中，也可用于通过指示信息确定第一PSFCH资源的方案中。
示例地，COT2内传输的数据的接收端包括UE-1，UE-2和UE-3，则UE-1，UE-2和UE-3反馈HARQ信息占用的PSFCH资源的索引可根据COT2内传输的数据在时域上的排序确定，可以是按照顺序排序，也可以按照倒序排序，本申请对此不做任何限制。如图8所示，时隙7，8，9中承载的数据未反馈HARQ信息，并且时隙7，8，9中承载的数据的接收端按照时域顺序排序分别为UE-1，UE-2，UE-3，因此接收UE-1对应PSFCH资源的索引为1，接收UE-2对应PSFCH资源的索引为2，接收UE-3对应PSFCH资源的索引为3。反之，如果时隙7，8，9中承载的数据的接收端按照时域倒序排序，接收UE-1，接收UE-2，接收UE-3对应的PSFCH资源的索引分别为3，2，1。
3、PSFCH的码域资源
当PSFCH通过序列发送时，码域资源为序列循环相位偏移，具体包括m 0和m cs。PSFCH序列可以由基于低峰均比的ZC(Zadoff–Chu)序列生成，其在时域上占用一个或多个连续的正交OFDM符号，在频域上可以是一个或多个资源块。
具体地，PSFCH序列的生成方式如下：
首先，可以根据序列长度生成一个基础序列r(n)，0≤n≤M ZC，然后对该基础序列r(n)进行相位旋转，得到可以复用的低峰均比序列，该低峰均比序列满足公式(1)。
Figure PCTCN2022100715-appb-000001
公式(1)中，M ZC＝12，l表示PSFCH传输时隙上的OFDM符号的编号，例如，l＝0表示当前PSFCH传输时隙上的第一个OFDM符号，α l表示相位旋转值。也就是说，可以采用不同的相位旋转值α l，以生成不同的PSFCH序列，并且可以将各个PSFCH序列码分复用在一个物理资源块(physical resource block，PRB)上进行发送。由于第二终端需要反馈ACK/NACK信息，因此需要给每个终端分配至少两个序列，并且这些序列分别对应于不同取值的α l，其中，相位旋转值α l可以满足公式(2)。
Figure PCTCN2022100715-appb-000002
公式(2)中，
Figure PCTCN2022100715-appb-000003
表示一个PRB中的子载波个数，在NR系统中，
Figure PCTCN2022100715-appb-000004
的取值可以为12。mod()表示取余，
Figure PCTCN2022100715-appb-000005
表示在一个无线帧中当前子载波间隔μ对应的SL传输时隙的编号。l′表示当前PSFCH传输时隙上相对于第一个OFDM符号的符号索引。函数
Figure PCTCN2022100715-appb-000006
可以满足如下公式(3)：
Figure PCTCN2022100715-appb-000007
其中，
Figure PCTCN2022100715-appb-000008
表示一个SL传输时隙中连续时域符号的数量，在NR系统中，
Figure PCTCN2022100715-appb-000009
的取值可以为14，m为取值在0至7之间的整数。c(i)表示伪随机序列中序号i的数值，生成伪随机序列的初始值为c init＝n ID，n ID由高层配置，如果高层没有配置n ID，则n ID＝0。
长度为M PN的伪随机序列c(n)可以由长度为31的gold序列循环移位生成，n＝0，1，…，M PN-1，其中，gold序列为两个m序列x 1(n)和x 2(n)。c(n)的具体生成过程如下：
c(n)＝(x 1(n+N c)+x 2(n+N c))mod 2
x 1(k+31)＝(x 1(k+3)+x 1(k))mod 2
x 2(k+31)＝(x 2(k+3)+x 2(k+2)+x 2(k+1)+x 2(k))mod 2
其中，N c＝1600，x 1(0)＝1，x 1(n)＝0，n＝1,2,…，30，x 2(n)可以由
Figure PCTCN2022100715-appb-000010
确定。
m 0表示一个PSFCH资源对的初始相位，m cs表示一个PSFCH资源对中ACK/NACK序列相对于初始相位的偏移。一个PSFCH资源对可以用于HARQ反馈，其中，一个序列可以用于反馈ACK，另一个序列用于反馈NACK。m 0的取值可以与同一个PSFCH时频资源上的序列对的个数相关，如表1所示，
Figure PCTCN2022100715-appb-000011
表示一个PSFCH时频资源上的序列对的 个数，例如当
Figure PCTCN2022100715-appb-000012
时，m 0＝0,当
Figure PCTCN2022100715-appb-000013
时，m 0有6种取值，分别为0，1，2，3，4，5。m cs的取值可以如表2或表3所示。
表1
Figure PCTCN2022100715-appb-000014
表2
HARQ-ACK值 0(NACK) 1(ACK)
序列循环移位 m cs＝0 m cs＝6
表3
HARQ-ACK值 0(ACK) 1(NACK)
序列循环移位 m cs＝0 m cs＝6
当各个PSFCH序列码分复用在一个物理资源块时，PSFCH资源索引还需要考虑同一个物理资源块上可以承载的序列对的个数。例如PSFCH资源集合在时域上占用一个符号，在频域上占用10个物理资源块，每个物理资源块上有6个序列对，即PSFCH资源集合包括60个PSFCH资源。
可选地，当PSFCH资源由隐式法则(预定义，预配置)确定时，PSFCH资源在排序时需要考虑时域，频域，码域。如图8所示，在COT2内未反馈的数据(对应UE-1，UE-2和UE-3)按照时域顺序或者倒序排序，如果PSFCH资源集合在时域上占用一个符号，在频域上占用1个物理资源块，每个物理资源块上有3个序列对，即PSFCH资源集合包括3个PSFCH资源，其中一个PSFCH资源对应1个序列对。如果时隙7，8，9中承载的数据的接收端按照时域顺序排序，则接收UE-1对应PSFCH资源的索引为1，接收UE-2对应PSFCH资源的索引为2，接收UE-3对应PSFCH资源的索引为3。反之，如果时隙7，8，9中承载的数据的接收端按照时域倒序排序，则接收UE-1，接收UE-2，接收UE-3对应的PSFCH资源的索引分别为3，2，1。
可选地，当PSFCH资源由指示信息显示指示时，需要在指示信息中指示序列循环相位偏移，即m 0和m cs。
方法200介绍了当第一终端通过LBT机制获取COT2，在COT2对应的资源上传输数据的过程中，因个别数据的反馈信息没有在COT2内反馈，从而第一终端通过LBT机制再次获取COT1，并通过第一指示信息指示第二终端，该COT1包括第一PSFCH资源，使得第二终端在第一PSFCH资源反馈第一HARQ信息。
应理解，第二终端接收到第一指示信息后，可通过预定义或网络设备预配置的信息确 定第一PSFCH资源，从而确定第一PSFCH资源的具体资源(时域，频域，码域资源)，并在第一PSFCH资源发送第一HARQ信息。
或者，第二终端接收到第一指示信息后，结合第三指示信息和/或第四指示信息确定第一PSFCH资源的具体资源，并在第一PSFCH资源发送第一HARQ信息。
或者，第二终端接收到第一指示信息后，可通过预定义，网络设备预配置和指示信息相结合的方式确定第一PSFCH资源的具体资源，并在第一PSFCH资源发送第一HARQ信息。至于是通过预定义，预配置的方式确定时域资源，通过指示信息确定频域资源；还是预定义，预配置的方式确定频域资源，通过指示信息确定时域资源，本申请对此不做任何限制。或者也可以是通过预定义，预配置的方式确定一部分时域参数(起始时间单元的索引，或占用的时间单元的个数)，没有预定义或预配置的其他时域参数和频域资源通过指示信息指示。或者也可以是通过预定义，预配置的方式确定一部分频域参数(起始频域单元的索引，或占用的频域单元的个数)，没有预定义或预配置的其他频域参数和时域资源通过指示信息指示，本申请对此不做任何限制。
当COT2未被反馈的数据有多个时，第二终端还需通过第二指示信息确定需对COT2内的哪个数据进行反馈。
方法200还可以是：第一终端通过LBT机制再次获取COT1后，直接通过第三指示信息和/或第四指示信息指示给第二终端第一PSFCH资源的具体资源(时域，频域，码域资源)，使得第二终端在第一PSFCH资源反馈第一HARQ信息。即第一终端可以不用发送第一指示信息告诉第二终端COT1中包括第一PSFCH资源，而是直接通过第三指示信息和/或第四指示信息指示第一PSFCH资源所在的资源位置，从而第二终端接收到第三指示信息和/或第四指示信息后在第一终端指示的资源位置上发送第一HARQ信息。
或者，第一终端通过LBT机制再次获取COT1后，可以不用发送第一指示信息告诉第二终端COT1中包括第一PSFCH资源，而是将COT1对应的资源通过指示信息指示给第二终端，第二终端接收到该指示信息后，可通过预定义的规则确定用于发送第一HARQ信息的第一PSFCH资源。
例如，第二终端可以确定第一数据所在的时域位置N，从而可以确定在时域位置N+K发送第一HARQ信息，第一HARQ信息占用的频域资源可通过上文介绍的第一PSFCH资源的频域资源的确定方法确定。
或者，第一终端通过LBT机制再次获取COT1后，将COT1对应的资源通过指示信息指示给第二终端(可选地，发送第一指示信息指示第二终端COT1中包括第一PSFCH资源)，并通过第三指示信息和/或第四指示信息指示第一PSFCH资源的具体资源(时域，频域，码域资源)，使得第二终端在第一PSFCH资源反馈第一HARQ信息。
应理解，上述第三指示信息指示第一PSFCH资源的时域资源的过程中可以是指示全部的时域资源参数(起始时间单元的索引和占用时间单元的个数)，也可以是指示部分的时域资源参数(起始时间单元的索引或占用时间单元的个数)，第三指示信息没有指示的时域资源参数通过预定义，或预配置的方式确定。同样地，上述第四指示信息指示第一PSFCH资源的频域资源的过程中可以是指示全部的频域资源参数(起始频域单元的索引和占用频域单元的个数)，也可以是指示部分的频域资源参数(起始频域单元的索引或占用频域单元的个数)，第四指示信息没有指示的频域资源参数通过预定义，或预配置的方 式确定。
可选地，上述第一指示信息，第二指示信息，第三指示信息，第四指示信息中的至少一项承载于SCI中，第一终端在COT1内向第二终端发送SCI。
还应理解，上述第三指示信息和第四指示信息可以是分别指示第一PSFCH资源的时域资源和频域资源，即第三指示信息通过一个字段指示第一PSFCH资源的时域资源，第四指示信息通过另一个字段指示第一PSFCH资源的频域资源。另外第三指示信息和第四指示信息也可以是通过同一个字段指示第一PSFCH资源的时域资源和频域资源，本申请对此不做任何限制。
基于上述方案，当数据的发送端(第一终端)基于LBT机制抢占到第一信道占用时间对应的资源后，使得第二终端在第一终端抢占资源上发送反馈信息，相对于第二终端自己竞争资源发送反馈信息的方案而言，能够减少第二终端竞争失败的可能性，提高数据传输的准确性。
上述介绍了第一终端通过LBT机制再次获取COT1，该COT1用于第二终端反馈第一HARQ信息的方法，另外，该COT1除了用于第二终端反馈第一HARQ信息外，还可用于传输数据，下面介绍COT1既用于反馈第一HARQ信息也用于传输数据的实施例。
一种可能的实施方式，方法200中的第一PSFCH资源除了用于反馈第一HARQ信息之外，还用于反馈第二HARQ信息，第二HARQ信息是对第二数据的反馈，该第二数据为第一终端在第一信道占用时间(COT1)内向所述第二终端发送的数据。
应理解，该实施例中第一PSFCH资源的具体资源(时域，频域，码域资源)的确定方式同上文方法200中各步骤的描述，在此不做赘述。
图12为本申请实施例提供的第一终端和第二终端在COT1内传输数据和HARQ信息的示意图。
当第一终端竞争信道成功后，获取第二信道占用时间COT2，假设COT2内包括10个时隙，第一终端可以在上述10个时隙内对不同的接收终端进行PSSCH传输，前7个时隙对应的HARQ信息可以在COT2内进行反馈，并且上述HARQ信息对应的PSFCH资源可以位于COT2内的最后一个时隙。而由于PSCCH的译码处理时延等因素，靠近COT2结束处的时隙7，8，9上的接收UE-1,接收UE-2，接收UE-3对应的HARQ信息来不及在COT2内进行反馈。第一终端需要为了上述时隙7，8，9对应的PSFCH资源，额外进行LBT来竞争信道。第一终端再次进行LBT并成功获取新的第一信道占用时间COT1。
图12中所示，该COT1内的前7个时隙用于传输数据，该数据可以是第一终端向不同的接收终端发送的数据，该接收终端可以包括第二终端。或者，该数据可以是第一终端向同一接收终端发送的不同数据。其中，若时隙0-时隙6上发送的数据包括第一终端向第二终端发送的第二数据，则COT1对应的资源中包括的第一PSFCH资源用于发送第一HARQ信息和第二HARQ信息，第二HARQ信息是对COT1内前7个时隙上传输的第二数据(数据接收端为第二终端)的反馈，COT1对应的资源中包括的除第一PSFCH资源外的其他PSFCH资源，用于反馈COT1以及COT2中其他接收终端(除第二终端外的接收终端)接收的数据所对应的HARQ信息。若时隙0-时隙6上发送的数据不包括第一终端向第二终端发送的第二数据，则COT1对应的资源中包括的PSFCH资源(时隙10上的PSFCH资源集合)用于反馈COT1中UE1，UE2，UE3接收的数据所对应的HARQ信息， 以及COT2中其他接收终端(除第二终端外的接收终端)接收的数据(即时隙0-时隙6上发送的数据)所对应的HARQ信息。
应理解，图12中的时间单元是以时隙举例，当然还可以是符号或者其他时间单元，本申请在此不做赘述。
可选地，用于指示第一PSFCH资源的指示信息可承载于COT1内的第9个时隙，此仅为举例，本申请实施例对此不做任何限制。
图12中的COT1内的第10个时隙用来传输PSFCH，该时隙上的PSFCH资源的具体分布可如图13所示。该时隙上的PSFCH资源集合包括N个PSFCH资源，其中部分PSFCH资源(例如PSFCH1，PSFCH2，PSFCH3)用于反馈COT2内传输数据对应的HARQ信息，该HARQ信息包括第一HARQ信息。部分PSFCH资源(例如PSFCH4-PSFCH N-1)用于反馈COT1内传输数据对应的HARQ信息，该HARQ信息包括第二HARQ信息。其中公共的PSFCH资源的位置可以是预定义的，或预配值的，或网络配置的(由DCI或RRC或SIB信息承载指示/配置)。例如可以是N个PSFCH资源中的第一个(PSFCH1)和最后一个(PSFCH N)。
应理解，图13中所示的用于反馈COT1内传输的数据对应的PSFCH资源，和用于反馈COT2内传输的数据对应的PSFCH资源的相对位置仅为示例，本申请对此不做任何限制。并且PSFCH资源集合中的每一个PSFCH资源的相对位置与其对应的数据在COT1，或COT2内的时域位置相关，具体是顺序相关还是倒序相关，本申请对此不做任何限制。
在该实施例中，因在PSFCH资源集合中反馈的HARQ信息对应的数据有多个，即包括COT1内传输的数据，也包括COT2内传输的数据，此时，可通过指示信息指示接收终端该数据的信息，例如PSSCH源标识和/或目的标识，从而接收终端通过PSSCH源标识和/或目的标识确定需要对哪一个数据进行反馈。
应理解，与步骤220不同的是，该指示信息指示的PSSCH源标识和/或目的标识对应的数据有可能是COT1内的，也有可能是COT2内的。而步骤220中第二指示信息指示的PSSCH源标识和目的标识对应的数据是COT2内的。
基于上述方案，第一终端可以通过LBT机制抢占到第一信道占用时间对应的资源，用于传输数据和反馈信息。在该方案中第一终端抢占资源是用于传输数据的，同时第一终端可在抢占的资源上接收之前在第二信道占用时间内没有反馈HARQ信息的数据所对应的HARQ信息，弥补了某些场景下第二信道占用时间内的数据在第二信道占用时间内没有反馈的缺陷，完善了数据传输过程的反馈机制。
应理解，上述流程图7中所示的虚线步骤为可选地步骤，并且各步骤的先后顺序依照方法的内在逻辑确定，图7中所示的序号仅为示例，不对本申请造成限制。
还应理解，本申请实施例提供的方法可以单独使用，也可以结合使用，本申请对此不做任何限制。
需注意的是，图7中示意的执行主体仅为示例，该执行主体也可以是支持该执行主体实现图7所示方法的芯片、芯片系统、或处理器，本申请对此不作限制。
上文结合附图描述了本申请实施例的方法实施例，下面描述本申请实施例的装置实施例。可以理解，方法实施例的描述与装置实施例的描述可以相互对应，因此，未描述的部分可以参见前面方法实施例。
可以理解的是，上述各个方法实施例中，由发送终端(以第一终端示例)或接收终端(以第二终端示例)实现的方法和操作，也可以由可用于发送终端或接收终端的部件(例如芯片或者电路)实现。
上述主要从各个设备之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，各个设备元，例如发射端设备或者接收端设备，为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对发射端设备或者接收端设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。下面以采用对应各个功能划分各个功能模块为例进行说明。
图14是本申请实施例提供的通信装置的示意性框图。该通信装置1400包括收发单元1410和处理单元1420。收发单元1410可以与外部进行通信，处理单元1420用于进行数据处理。收发单元1410还可以称为通信接口或通信单元。
可选地，该通信装置1400还可以包括存储单元，该存储单元可以用于存储指令或者和/或数据，处理单元1420可以读取存储单元中的指令或者和/或数据。
在一种情况下，该通信装置1400可以为第一终端，收发单元1410用于执行上文方法实施例中第一终端的接收或发送的操作，处理单元1420用于执行上文方法实施例中第一终端内部处理的操作。
在一种设计中，该收发单元1410用于向第二终端发送第一指示信息，该第一指示信息指示第一信道占用时间包括第一物理层侧链路反馈信道PSFCH资源，该收发单元1410还用于在该第一PSFCH资源接收来自第二终端的反馈信息。
或在另一种设计中，该收发单元1410用于向第二终端发送第一指示信息，该第一指示信息指示第一信道占用时间对应的资源，该收发单元1410还用于在该第一信道占用时间对应的资源接收来自第二终端的反馈信息。
该收发单元1410具体用于在第一PSFCH资源接收来自第二终端的第一混合式自动重传请求HARQ信息，该第一HARQ信息是对第一数据的反馈，第一数据为第一终端在第二信道占用时间内向第二终端发送的数据，第一信道占用时间在第二信道占用时间之后。
基于上述方案，当数据的发送端(第一终端)基于LBT机制抢占到第一信道占用时间对应的资源后，将第一信道占用时间对应的资源或者将第一信道占用时间包括第一PSFCH资源指示给第二终端(数据的接收端)，从而使得第二终端在指示的第一信道占用时间对应的资源，或者通过预定义的规则确定的第一PSFCH资源上发送反馈信息。该方案相对于第二终端自己竞争资源发送反馈信息的方案而言，能够减少第二终端竞争失败的可能性，提高数据传输的准确性。
一种可能的实施方式，该收发单元1410具体用于在第一PSFCH资源接收来自第二终端的第一HARQ信息和第二HARQ信息，该第一HARQ信息是对第一数据的反馈，第一数据为第一终端在第二信道占用时间内向第二终端发送的数据，第二HARQ信息是对第二数据的反馈，第二数据为第一终端在第一信道占用时间内向第二终端发送的数据。
一种可能的实施方式，该收发单元1410还用于向第二终端发送第二指示信息，第二指示信息指示第一HARQ信息对应的第一数据的信息。
一种可能的实施方式，该第一数据的信息包括第一PSSCH源标识和/或目的标识。
一种可能的实施方式，该处理单元1420用于基于第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数确定第一PSFCH资源的时域资源。
一种可能的实施方式，该收发单元1410还用于向第二终端发送第三指示信息，第三指示信息指示第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数。
一种可能的实施方式，该处理单元1420还用于基于第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数确定第一PSFCH资源的频域资源。
一种可能的实施方式，该收发单元1410还用于向第二终端发送第四指示信息，第四指示信息指示第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数。
一种可能的实施方式，该处理单元1420还用于基于第一数据在第二信道占用时间内所在的时域位置确定第一PSFCH资源的频域资源。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为第一PSFCH资源所在时间单元上包括的频域单元的索引。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为PSFCH资源集合中的PSFCH资源所在的频域单元的索引，PSFCH资源集合为第一PSFCH资源所在时间单元上的PSFCH资源的集合，PSFCH资源集合中的PSFCH资源的频域资源基于位图，PSFCH资源集合的起始PSFCH资源和间隔中的至少一个确定，间隔为PSFCH资源集合中相邻PSFCH资源之间的频域单元间隔。
一种可能的实施方式，上述位图，PSFCH资源集合的起始PSFCH资源，和间隔可通过预定义，预配置，或网络设备配置的方式确定。
一种可能的实施方式，第一指示信息，第二指示信息，第三指示信息和第四指示信息中的至少一个承载于侧链路控制信息SCI中，该SCI在第一信道占用时间内传输。
可选地，该通信装置1400可以为配置在第一终端中的部件，例如，第一终端中的芯片。
这种情况下，收发单元1410可以为接口电路、管脚等。具体地，接口电路可以包括输入电路和输出电路，处理单元1420可以包括处理电路。
可选地，收发单元1410还可以为射频模块。处理单元1420可以为基带模块。其中，射频模块主要用于射频信号的收发以及射频信号与基带信号的转换；基带模块主要用于基带处理，对基站进行控制等。
图15是本申请实施例提供的通信装置的示意性框图。该通信装置1500包括收发单元1510和处理单元1520。收发单元1510可以与外部进行通信，处理单元1520用于进行数 据处理。收发单元1510还可以称为通信接口或通信单元。
可选地，该通信装置1500还可以包括存储单元，该存储单元可以用于存储指令或者和/或数据，处理单元1520可以读取存储单元中的指令或者和/或数据。
在另一种情况下，该通信装置1500为第二终端，收发单元1510用于执行上文方法实施例中第二终端的接收或发送的操作，处理单元1520用于执行上文方法实施例中第二终端内部处理的操作。
在一种设计中，该收发单元1510用于接收来自第一终端的第一指示信息，第一指示信息指示第一信道占用时间包括第一PSFCH资源，该收发单元1510还用于在第一PSFCH资源向第一终端发送反馈信息。
或者在另一种设计中，该收发单元1510用于接收来自第一终端的第一指示信息，第一指示信息指示第一信道占用时间对应的资源，该收发单元1510还用于在第一信道占用时间对应的资源向第一终端发送反馈信息。
基于上述方案，当数据的发送端(第一终端)基于LBT机制抢占到第一信道占用时间对应的资源后，将第一信道占用时间对应的资源或者将第一信道占用时间包括第一PSFCH资源指示给第二终端(数据的接收端)，从而使得第二终端在指示的第一信道占用时间对应的资源，或者通过预定义的规则确定的第一PSFCH资源上发送反馈信息。该方案相对于第二终端自己竞争资源发送反馈信息的方案而言，能够减少第二终端竞争失败的可能性，提高数据传输的准确性。
一种可能的实施方式，该收发单元1510具体用于在第一PSFCH资源向第一终端发送第一HARQ信息，第一HARQ信息是对第一数据的反馈，第一数据为第二终端在第二信道占用时间内接收到的来自第一终端的数据，第一信道占用时间在第二信道占用时间之后。
一种可能的实施方式，该收发单元1510具体用于在第一PSFCH资源向第一终端发送第一HARQ信息和第二HARQ信息，第一HARQ信息是对第一数据的反馈，第一数据为第二终端在第二信道占用时间内接收到的来自第一终端的数据，第二HARQ信息是对第二数据的反馈，第二数据为第二终端在第一信道占用时间内接收到的来自第一终端的数据。
一种可能的实施方式，该收发单元1510还用于接收来自第一终端的第二指示信息，第二指示信息指示第一HARQ信息对应的第一数据的信息，该处理单元用于根据第二指示信息控制该收发单元在第一PSFCH资源向第一终端发送第一HARQ信息。
一种可能的实施方式，第一数据的信息包括PSSCH源标识和/或目的标识，该处理单元1520具体用于根据PSSCH源标识和/或目的标识确定第一数据，并控制该收发单元1510在第一PSFCH资源向第一终端发送第一数据对应的第一HARQ信息。
一种可能的实施方式，该处理单元1520还用于基于第一PSFCH的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数确定第一PSFCH资源的时域资源。
一种可能的实施方式，该收发单元1510还用于接收来自第一终端的第三指示信息，第三指示信息指示第一PSFCH资源的起始时间单元的索引和/或第一PSFCH资源占用的时间单元的个数。
一种可能的实施方式，该处理单元1520还用于基于第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数确定第一PSFCH资源的频域资源。
一种可能的实施方式，该收发单元1510还用于接收来自第一终端的第四指示信息， 第四指示信息指示第一PSFCH资源的起始频域单元的索引和/或第一PSFCH资源占用的频域单元的个数。
一种可能的实施方式，该处理单元1520还用于基于第一数据在第二信道占用时间内所在的时域位置确定第一PSFCH资源的频域资源。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为第一PSFCH资源所在时间单元上包括的频域单元的索引。
一种可能的实施方式，第一PSFCH资源的起始频域单元的索引为PSFCH资源集合中的PSFCH资源所在的频域单元的索引，PSFCH资源集合为第一PSFCH资源所在时间单元上的PSFCH资源的集合，PSFCH资源集合中的PSFCH资源的频域资源基于位图，PSFCH资源集合的起始PSFCH资源和间隔中的至少一个确定，间隔为PSFCH资源集合中相邻PSFCH资源之间的频域单元间隔。
一种可能的实施方式，上述位图，PSFCH资源集合的起始PSFCH资源，和间隔可通过预定义，预配置，或网络设备配置的方式确定。
一种可能的实施方式，第一指示信息，第二指示信息，第三指示信息和第四指示信息中的至少一个承载于SCI中，所述SCI在所述第一信道占用时间内传输。
可选地，该通信装置1500可以为配置在第二终端中的部件，例如，第二终端中的芯片。
这种情况下，收发单元1510可以为接口电路、管脚等。具体地，接口电路可以包括输入电路和输出电路，处理单元1520可以包括处理电路。
可选地，收发单元1510还可以为射频模块。处理单元1520可以为基带模块。其中，射频模块主要用于射频信号的收发以及射频信号与基带信号的转换；基带模块主要用于基带处理，对基站进行控制等。
图16给出了本申请实施例提供的一种终端设备的结构示意图。
该终端设备1600可适用于图1(a)，1(b)，或1(c)所示的系统中。该终端设备1600可以是方法实施中的第一终端或第二终端，为了便于说明，图16仅示出了终端设备1600的主要部件。如图16所示，终端设备1600包括处理器、存储器、控制电路、天线以及输入输出装置。收发器1630用于执行上文方法实施例中第一终端或第二终端的接收或发送的操作，处理器1610用于执行上文方法实施例中第一终端或第二终端内部处理的操作。
处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端设备1600进行控制，执行软件程序，处理软件程序的数据。存储器主要用于存储软件程序和数据。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏，显示屏，麦克风，键盘等主要用于接收用户输入的数据以及对用户输出数据。
以终端设备1600为手机为例，当终端设备1600开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至控制电路，控制电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备1600时，控制电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图16仅示出了一个处理器1610，一个存储器1620，一个收发器1630(虚线框表示收发器为可选)。在一些实施例中，终端设备1600可以包括多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本发明实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备1600进行控制，执行软件程序，处理软件程序的数据。图16中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。终端设备1600可以包括多个基带处理器以适应不同的网络制式，终端设备1600可以包括多个中央处理器以增强其处理能力，终端设备1600的各个部件可以通过各种总线连接。所述基带处理器也可以表述为基带处理电路或者基带处理芯片。所述中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
在一个例子中，可以将具有收发功能的天线和控制电路视为终端设备1600的收发单元，将具有处理功能的处理器视为终端设备1600的处理单元。收发单元也可以称为收发器、收发机、收发装置等。可选的，可以将收发单元中用于实现接收功能的器件视为接收单元，将收发单元中用于实现发送功能的器件视为发送单元，即收发单元包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
本申请实施例还提供一种计算机可读存储介质，其上存储有用于实现上述方法实施例中由第一终端或第二终端执行的方法的计算机指令。
例如，该计算机程序被计算机执行时，使得该计算机可以实现上述方法实施例中由第一终端或第二终端执行的方法。
本申请实施例还提供一种包含指令的计算机程序产品，该指令被计算机执行时使得该计算机实现上述方法实施例中由第一终端或第二终端执行的方法。
本申请实施例还提供一种通信系统，该通信系统包括上文实施例中的第一终端和第二终端。可选地，该通信系统包括第一终端和多个第二终端。
上述提供的任一种通信装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例，此处不再赘述。
在本申请实施例中，第一终端或第二终端可以包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。其中，硬件层可以包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。操作系统层的操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。应用层可以包含浏览器、通讯录、文字处理软件、即时通信软件等应用。
本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构进行特别限定，只要能够通过运行记录有本申请实施例提供的方法的代码的程序，以根据本申请实施例提 供的方法进行通信即可。例如，本申请实施例提供的方法的执行主体可以是第一终端或第二终端，或者，是第一终端或第二终端中能够调用程序并执行程序的功能模块。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
还应理解，本文中涉及的第一、第二以及各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的计算机可读存储介质，可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括随机存取存储器(random access memory，RAM)、只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦可编程只读存储器(electrically erasable programmable read only memory，EEPROM)、紧凑型光盘只读存储器(compact disc read-only memory，CD-ROM)、通用串行总线闪存盘(universal serial bus flash disk)、移动硬盘、或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储 具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。另外，通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)或直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
以上所述，仅为本申请的具体实施方式，但本申请实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请实施例的保护范围之内。因此，本申请实施例的保护范围应所述以权利要求的保护范围为准。

Claims (31)

  1. 一种侧行链路反馈信息传输的方法，其特征在于，包括：
    第一终端向第二终端发送第一指示信息，所述第一指示信息指示第一信道占用时间包括第一物理层侧链路反馈信道PSFCH资源；
    所述第一终端在所述第一PSFCH资源接收来自所述第二终端的反馈信息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一终端在所述第一PSFCH资源接收来自所述第二终端的反馈信息，包括：
    所述第一终端在所述第一PSFCH资源接收来自所述第二终端的第一混合式自动重传请求HARQ信息，所述第一HARQ信息是对第一数据的反馈，所述第一数据为所述第一终端在第二信道占用时间内向所述第二终端发送的数据，第一信道占用时间在所述第二信道占用时间之后。
  3. 根据权利要求2所述的方法，其特征在于，所述第一终端在所述第一PSFCH资源接收来自所述第二终端的第一HARQ信息，包括：
    所述第一终端在所述第一PSFCH资源接收来自所述第二终端的第一HARQ信息和第二HARQ信息，所述第二HARQ信息是对第二数据的反馈，所述第二数据为所述第一终端在所述第一信道占用时间内向所述第二终端发送的数据。
  4. 根据权利要求2或3所述的方法，其特征在于，所述方法还包括：
    所述第一终端向所述第二终端发送第二指示信息，所述第二指示信息指示所述第一HARQ信息对应的所述第一数据的信息。
  5. 根据权利要求4所述的方法，其特征在于，所述第一数据的信息包括物理层侧行链路共享信道PSSCH源标识和/或目的标识。
  6. 根据权利要求5所述的方法，其特征在于，所述第一PSFCH资源的时域资源基于所述第一PSFCH资源的起始时间单元的索引和/或所述第一PSFCH资源占用的时间单元的个数确定。
  7. 根据权利要求6所述的方法，其特征在于，所述方法还包括：
    所述第一终端向所述第二终端发送第三指示信息，所述第三指示信息指示所述第一PSFCH资源的起始时间单元的索引和/或所述第一PSFCH资源占用的时间单元的个数。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，所述第一PSFCH资源的频域资源基于所述第一PSFCH资源的起始频域单元的索引和/或所述第一PSFCH资源占用的频域单元的个数确定。
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    所述第一终端向所述第二终端发送第四指示信息，所述第四指示信息指示所述第一PSFCH资源的起始频域单元的索引和/或所述第一PSFCH资源占用的频域单元的个数。
  10. 根据权利要求8或9所述的方法，其特征在于，所述第一PSFCH资源的频域资源基于所述第一数据在第二信道占用时间内所在的时域位置确定。
  11. 根据权利要求8至10中任一项所述的方法，其特征在于，所述第一PSFCH资源的起始频域单元的索引为所述第一PSFCH资源所在时间单元上包括的频域单元的索引。
  12. 根据权利要求8至10中任一项所述的方法，其特征在于，所述第一PSFCH资源的起始频域单元的索引为PSFCH资源集合中的PSFCH资源所在的频域单元的索引，所述PSFCH资源集合为所述第一PSFCH资源所在时间单元上的PSFCH资源的集合，所述PSFCH资源集合中的PSFCH资源的频域资源基于位图，所述PSFCH资源集合的起始PSFCH资源和间隔中的至少一个确定，所述间隔为所述PSFCH资源集合中相邻PSFCH资源之间的频域单元间隔。
  13. 根据权利要求1至12中任一项所述的方法，其特征在于，所述第一指示信息，所述第二指示信息，所述第三指示信息和所述第四指示信息中的至少一个承载于侧链路控制信息SCI中，所述SCI在所述第一信道占用时间内传输。
  14. 一种侧行链路反馈信息传输的方法，其特征在于，包括：
    第二终端接收来自第一终端的第一指示信息，所述第一指示信息指示第一信道占用时间包括第一物理层侧链路反馈信道PSFCH资源；
    所述第二终端在所述第一PSFCH资源向所述第一终端发送反馈信息。
  15. 根据权利要求14所述的方法，其特征在于，所述第二终端在所述第一PSFCH资源发送反馈信息，包括：
    所述第二终端在所述第一PSFCH资源向所述第一终端发送第一混合式自动重传请求HARQ信息，所述第一HARQ信息是对第一数据的反馈，所述第一数据为所述第二终端在第二信道占用时间内接收到的来自所述第一终端的数据，第一信道占用时间在所述第二信道占用时间之后。
  16. 根据权利要求15所述的方法，其特征在于，所述第二终端在所述第一PSFCH资源向所述第一终端发送第一HARQ信息，包括：
    所述第二终端在所述第一PSFCH资源向所述第一终端发送第一HARQ信息和第二HARQ信息，所述第二HARQ信息是对第二数据的反馈，所述第二数据为所述第二终端在所述第一信道占用时间内接收到的来自所述第一终端的数据。
  17. 根据权利要求15或16所述的方法，其特征在于，所述方法还包括：
    所述第二终端接收来自所述第一终端的第二指示信息，所述第二指示信息指示所述第一HARQ信息对应的所述第一数据的信息；
    所述第二终端在所述第一PSFCH资源向所述第一终端发送第一HARQ信息包括：
    所述第二终端根据所述第二指示信息在所述第一PSFCH资源向所述第一终端发送第一HARQ信息。
  18. 根据权利要求17所述的方法，其特征在于，所述第一数据的信息包括物理层侧行链路共享信道PSSCH源标识和/或目的标识。
  19. 根据权利要求18所述的方法，其特征在于，所述第一PSFCH资源的时域资源基于所述第一PSFCH的起始时间单元的索引和/或所述第一PSFCH资源占用的时间单元的个数确定。
  20. 根据权利要求19所述的方法，其特征在于，所述方法还包括：
    所述第二终端接收来自所述第一终端的第三指示信息，所述第三指示信息指示所述第一PSFCH资源的起始时间单元的索引和/或所述第一PSFCH资源占用的时间单元的个数。
  21. 根据权利要求14至20中任一项所述的方法，其特征在于，所述第一PSFCH资 源的频域资源基于所述第一PSFCH资源的起始频域单元的索引和/或所述第一PSFCH资源占用的频域单元的个数确定。
  22. 根据权利要求21所述的方法，其特征在于，所述方法还包括：
    所述第二终端接收来自所述第一终端的第四指示信息，所述第四指示信息指示所述第一PSFCH资源的起始频域单元的索引和/或所述第一PSFCH资源占用的频域单元的个数。
  23. 根据权利要求21或22所述的方法，其特征在于，所述第一PSFCH资源的频域资源基于所述第一数据在第二信道占用时间内所在的时域位置确定。
  24. 根据权利要求21至23中任一项所述的方法，其特征在于，所述第一PSFCH资源的起始频域单元的索引为所述第一PSFCH资源所在时间单元上包括的频域单元的索引。
  25. 根据权利要求21至23中任一项所述的方法，其特征在于，所述第一PSFCH资源的起始频域单元的索引为PSFCH资源集合中的PSFCH资源所在的频域单元的索引，所述PSFCH资源集合为所述第一PSFCH资源所在时间单元上的PSFCH资源的集合，所述PSFCH资源集合中的PSFCH资源的频域资源基于位图，所述PSFCH资源集合的起始PSFCH资源和间隔中的至少一个确定，所述间隔为所述PSFCH资源集合中相邻PSFCH资源之间的频域单元间隔。
  26. 根据权利要求14至25中任一项所述的方法，其特征在于，所述第一指示信息，所述第二指示信息，所述第三指示信息和所述第四指示信息中的至少一个承载于侧链路控制信息SCI中，所述SCI在所述第一信道占用时间内传输。
  27. 一种通信装置，其特征在于，包括用于执行如权利要求1至13中任一项所述方法的模块，或包括用于执行如权利要求14至26中任一项所述方法的模块。
  28. 一种通信装置，其特征在于，包括处理器和存储器；所述存储器用于存储一个或多个计算机程序，当所述一个或多个计算机程序被运行时，使得如权利要求1至13中任一项所述的方法被执行，或使得如权利要求14至26中任一项所述的方法被执行。
  29. 一种通信系统，其特征在于，所述通信系统包括第一终端和第二终端，所述第一终端用于执行如权利要求1至13中任意一项所述的方法，所述第二终端用于执行如权利要求14至26中任意一项所述的方法。
  30. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1至13中任一项所述的方法，或使得所述计算机执行如权利要求14至26中任一项所述的方法。
  31. 一种计算机程序产品，其特征在于，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被运行时，实现如权利要求1至13中任一项所述的方法，或实现如权利要求14至26中任一项所述的方法。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024152899A1 (zh) * 2023-01-16 2024-07-25 华为技术有限公司 一种通信方法及装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230319873A1 (en) * 2022-03-31 2023-10-05 Qualcomm Incorporated Maintaining channel occupancy time in sidelink communication
CN117014118A (zh) * 2022-04-29 2023-11-07 华为技术有限公司 通信的方法和装置
WO2024159479A1 (en) * 2023-02-02 2024-08-08 Apple Inc. Physical sidelink feedback channel resource determinations in unlicensed spectrum
CN118540807A (zh) * 2023-02-17 2024-08-23 华为技术有限公司 一种通信方法及装置
CN118540793A (zh) * 2023-02-17 2024-08-23 华为技术有限公司 资源使用方法及装置
WO2024109137A1 (en) * 2023-07-26 2024-05-30 Lenovo (Beijing) Limited Physical sidelink feedback channel selection and transmission

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110545533A (zh) * 2019-08-16 2019-12-06 中国信息通信研究院 一种车联网反馈资源配置方法、终端设备
US20200037343A1 (en) * 2018-07-24 2020-01-30 Samsung Electronics Co., Ltd. Method and apparatus for network controlled resource allocation in nr v2x
CN112118628A (zh) * 2019-06-19 2020-12-22 夏普株式会社 由用户设备执行的方法以及用户设备
WO2021029557A1 (ko) * 2019-08-14 2021-02-18 현대자동차주식회사 사이드링크 통신을 지원하는 통신 시스템에서 harq 응답의 송수신을 위한 방법 및 장치
CN112398613A (zh) * 2019-08-15 2021-02-23 华为技术有限公司 一种用于指示信号传输的方法及装置
CN112671521A (zh) * 2019-10-15 2021-04-16 联发科技（新加坡）私人有限公司 侧链路传送方法和装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111526494B (zh) * 2019-08-09 2021-08-24 维沃移动通信有限公司 旁链路资源映射方法、传输方法、网络设备及终端设备
US11672034B2 (en) * 2019-09-25 2023-06-06 Qualcomm Incorporated Channel occupancy time (COT) sharing for sidelink

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200037343A1 (en) * 2018-07-24 2020-01-30 Samsung Electronics Co., Ltd. Method and apparatus for network controlled resource allocation in nr v2x
CN112118628A (zh) * 2019-06-19 2020-12-22 夏普株式会社 由用户设备执行的方法以及用户设备
WO2021029557A1 (ko) * 2019-08-14 2021-02-18 현대자동차주식회사 사이드링크 통신을 지원하는 통신 시스템에서 harq 응답의 송수신을 위한 방법 및 장치
CN112398613A (zh) * 2019-08-15 2021-02-23 华为技术有限公司 一种用于指示信号传输的方法及装置
CN110545533A (zh) * 2019-08-16 2019-12-06 中国信息通信研究院 一种车联网反馈资源配置方法、终端设备
CN112671521A (zh) * 2019-10-15 2021-04-16 联发科技（新加坡）私人有限公司 侧链路传送方法和装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
See also references of EP4351055A4
ZTE, SANECHIPS: "Consideration on HARQ feedback for groupcast", 3GPP DRAFT; R2-1906481 CONSIDERATION ON HARQ FEEDBACK FOR GROUPCAST, vol. RAN WG2, 3 May 2019 (2019-05-03), Reno, USA, pages 1 - 3, XP051710796 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024152899A1 (zh) * 2023-01-16 2024-07-25 华为技术有限公司 一种通信方法及装置

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