WO2023208192A1 - 物理侧链路反馈信道发送方法及装置、可读存储介质 - Google Patents

物理侧链路反馈信道发送方法及装置、可读存储介质 Download PDF

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Publication number
WO2023208192A1
WO2023208192A1 PCT/CN2023/091583 CN2023091583W WO2023208192A1 WO 2023208192 A1 WO2023208192 A1 WO 2023208192A1 CN 2023091583 W CN2023091583 W CN 2023091583W WO 2023208192 A1 WO2023208192 A1 WO 2023208192A1
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Prior art keywords
psfch
symbol
feedback channel
candidate transmission
time slot
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PCT/CN2023/091583
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English (en)
French (fr)
Inventor
陈咪咪
张萌
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展讯通信（上海）有限公司
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Publication of WO2023208192A1 publication Critical patent/WO2023208192A1/zh

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    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • 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
    • 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
    • H04L5/0078—Timing of allocation
    • H04L5/0082—Timing of allocation at predetermined intervals

Definitions

  • the present invention relates to the field of communication technology, and in particular to a method and device for sending a physical side link feedback channel, and a readable storage medium.
  • PSFCH Physical Sidelink Feedback Channel
  • RB Resource Block
  • OFDM Orthogonal Frequency Division Multiplexing
  • side links may be applied to unlicensed spectrum.
  • PSFCH may be unable to transmit at some points in time due to Listen Before Talk (LBT) restrictions.
  • LBT Listen Before Talk
  • the embodiments of the present invention solve the technical problem of low PSFCH transmission success rate.
  • embodiments of the present invention provide a physical side link feedback channel PSFCH sending method, including: receiving configuration information; the configuration information is indicated in a There are multiple candidate transmission opportunities for transmitting PSFCH in each PSFCH time slot; listen-before-talk is performed on the multiple candidate transmission opportunities in sequence, and PSFCH transmission is performed on the successful candidate transmission opportunity where listen-before-talk is successful.
  • the configuration information indicates a fixed starting symbol corresponding to the candidate transmission opportunity.
  • the configuration information indicates that the starting symbol corresponding to the candidate transmission opportunity is: any symbol in the PSFCH time slot.
  • the configuration information indicates that the starting symbol corresponding to the candidate transmission opportunity is: any symbol after the k-th symbol in the PSFCH time slot; or, starting from the k-th symbol in the PSFCH time slot any symbol after .
  • the starting symbol is an automatic gain control symbol or a gap symbol.
  • the number of candidate transmission opportunities in one PSFCH time slot is positively correlated with the channel busy coefficient.
  • the physical side link feedback channel sending method further includes: obtaining the maximum number of delayed transmissions.
  • the maximum number of delayed transmissions is related to the packet delay budget corresponding to the sent data.
  • the physical side link feedback channel sending method further includes: obtaining the number of PSFCH time slots indicated by the configuration information.
  • Embodiments of the present invention also provide a computer-readable storage medium.
  • the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and a computer-readable storage medium is stored thereon.
  • a computer program is configured to execute the steps of any one of the above physical side link feedback channel sending methods when the computer program is run by a processor.
  • An embodiment of the present invention also provides another physical side link feedback channel sending device, which includes a memory and a processor.
  • the memory stores a computer program that can run on the processor.
  • the processor runs the The computer program executes the steps of any one of the above physical side link feedback channel sending methods.
  • the probability of LBT success in the time slot can be increased, thereby increasing the probability of successful PSFCH transmission.
  • Figure 1 is a flow chart of a physical side link feedback channel sending method in an embodiment of the present invention
  • Figure 2 is a schematic structural diagram of an existing PSFCH in a time slot
  • Figure 3 is a schematic structural diagram of a physical side link feedback channel sending device in an embodiment of the present invention.
  • PSFCH occupies two symbols, and the information transmitted by the two symbols is exactly the same.
  • the first symbol can be used for automatic gain control (AGC).
  • AGC automatic gain control
  • PSFCH is configured periodically.
  • AGC symbol the automatic gain control symbol of PSFCH.
  • the probability of LBT success in the time slot can be increased, thereby increasing the probability of successful PSFCH transmission.
  • An embodiment of the present invention provides a method for sending a physical side link feedback channel. Referring to Figure 1, detailed description will be given below through specific steps.
  • the physical side link feedback channel sending method described in the following steps S101 to S102 can be executed by a chip with a data processing function in the user equipment, or can also be executed by a chip with a data processing function in the user equipment. chip module to execute.
  • Step S101 Receive configuration information.
  • the access network device may deliver configuration information to the terminal device, and the configuration information may be used to indicate that there are multiple candidate transmission opportunities for transmitting the PSFCH within a PSFCH time slot (slot).
  • the terminal device can receive the configuration information delivered by the access network device, thereby learning the starting symbols corresponding to multiple candidate transmission opportunities in a PSFCH time slot, and thus learning which symbols may be used.
  • the configuration information indicates that within one PSFCH slot, the starting symbols of candidate transmission opportunities for transmitting PSFCH are the 2nd symbol, the 4th symbol, the 6th symbol, the 8th symbol and the 10th symbol. .
  • any symbol within a PSFCH time slot is the starting symbol corresponding to the candidate transmission opportunity.
  • the k-th symbol within 1 PSFCH slot can also be indicated. Any subsequent symbol is the starting symbol corresponding to the candidate transmission opportunity. Or, it is indicated that the k-th symbol and any symbol after the k-th symbol in one PSFCH slot are the starting symbols corresponding to the candidate transmission opportunities.
  • the access network device can deliver configuration information to the terminal device through high-level signaling
  • the high-level signaling can be Radio Resource Control (Radio Resource Control, RRC) signaling or PC5-RRC signaling.
  • RRC Radio Resource Control
  • PC5-RRC PC5-RRC signaling
  • the access network device can also deliver configuration information to the terminal device through dynamic signaling.
  • the dynamic signaling can be downlink control information (DCI), MAC-CE, SCI, or PC5-MAC-CE. Either.
  • Step S102 Perform listen-before-talk on multiple candidate transmission opportunities in sequence, and perform PSFCH transmission on the candidate transmission opportunity that succeeds in listen-before-talk.
  • the user equipment after determining multiple candidate transmission opportunities in a PSFCH time slot according to the configuration information, the user equipment can sequentially perform listen-before-talk on the symbols corresponding to the multiple candidate transmission opportunities. And transmit PSFCH on the symbol corresponding to the successful candidate transmission opportunity of listen before talking.
  • the starting symbol corresponding to the candidate transmission opportunity may be PSFCH.
  • the automatic gain control symbol can also be the gap symbol (Gap symbol) before the automatic gain control symbol.
  • the gap symbol can control the actual gap size by extending the cyclic prefix (Cyclic Prefix Extension, CPE).
  • the PSFCH sending method provided in the embodiment of the present invention is described below by taking an example.
  • the setting configuration information indicates that within one PSFCH time slot, the starting symbols of candidate transmission opportunities for transmitting PSFCH are the 2nd symbol, the 4th symbol, and the 6th symbol. At this time, there are essentially three PSFCH candidate transmission opportunities in one PSFCH slot.
  • its starting symbol is the second symbol in the PSFCH slot.
  • the PSFCH will be transmitted starting from the second symbol.
  • the second symbol in the PSFCH time slot is the AGC symbol of PSFCH
  • the third symbol in the PSFCH time slot is used to transmit PSFCH
  • the fourth symbol in the PSFCH time slot can be the Gap symbol.
  • the second symbol in the PSFCH slot is the Gap symbol
  • the third symbol in the PSFCH slot is used to transmit PSFCH.
  • the 4th symbol is the AGC symbol
  • the 5th symbol in the PSFCH slot is the Gap symbol.
  • PSFCH will be transmitted.
  • the 4th symbol and 6th symbol in the PSFCH time slot will no longer be used to transmit PSFCH, but can be transmitted. Other data.
  • PSFCH will be transmitted starting from the 4th symbol.
  • the 4th symbol in the PSFCH time slot is the AGC symbol of PSFCH
  • the 5th symbol in the PSFCH time slot is used to transmit PSFCH
  • the 6th symbol in the PSFCH time slot is the Gap symbol.
  • the 4th symbol in the PSFCH time slot is the Gap symbol
  • the 5th symbol in the PSFCH time slot is used to transmit PSFCH
  • the 5th symbol in the PSFCH time slot is used to transmit PSFCH.
  • the 6th symbol is the AGC symbol
  • the 7th symbol in the PSFCH slot is the Gap symbol.
  • PSFCH is transmitted.
  • the 6th symbol in the PSFCH time slot is no longer used to transmit PSFCH, but can transmit other data.
  • PSFCH will be transmitted starting from the 6th symbol.
  • the 6th symbol in the PSFCH time slot is the AGC symbol of PSFCH
  • the 7th symbol in the PSFCH time slot is used to transmit PSFCH
  • the 8th symbol in the PSFCH time slot is the Gap symbol.
  • the 6th symbol in the PSFCH time slot is the Gap symbol
  • the 7th symbol in the PSFCH time slot is used to transmit PSFCH
  • the 7th symbol in the PSFCH time slot is used to transmit PSFCH.
  • the 8th symbol is the AGC symbol
  • the 9th symbol in the PSFCH slot is the Gap symbol.
  • the later candidate transmission opportunity can no longer be used for PSFCH transmission, but can be used for other purposes, thereby improving the data transmission efficiency.
  • the transmission of PFSCH can start from the PSFCH optional starting symbol that is the first LBT to succeed in a time slot or a PSFCH time slot.
  • the starting symbol that can be transmitted by PSFCH in a time slot can be any symbol in a time slot, or can be determined in a predefined manner to be 1 or several symbols in a time slot.
  • the starting symbol that can be transmitted by PSFCH in a time slot can be any symbol in a PSFCH time slot, or can be determined in a predefined manner to be one or several symbols in a PSFCH time slot.
  • the PSFCH time slot refers to the time slot used for transmitting the PSFCH determined based on the period and or offset information of the PSFCH configured in higher layer signaling.
  • the candidate transmission opportunities of PSFCH within a PSFCH time slot may be positively correlated with the channel busyness factor (CBR).
  • CBR channel busyness factor
  • the channel busy coefficient and candidate transmission can be configured in advance or through high-layer signaling (such as RRC or PC5-RRC) or dynamic signaling (such as DCI or SCI or MAC-CE or PC5-MAC-CE).
  • high-layer signaling such as RRC or PC5-RRC
  • dynamic signaling such as DCI or SCI or MAC-CE or PC5-MAC-CE.
  • the number of candidate transmission opportunities can be determined from a preset mapping relationship according to the current channel busy coefficient.
  • the number of candidate transmission opportunities in a PSFCH time slot is 1; when the value of the channel busy coefficient is between i and j, the number of candidate transmission opportunities in a PSFCH time slot is The number of transmission opportunities is 3; when the value of the channel busy coefficient is j ⁇ 1, the number of candidate transmission opportunities in a PSFCH time slot is 5; 0 ⁇ i ⁇ j ⁇ 1.
  • the following scenario may exist: all candidate transmission opportunities in a PSFCH time slot fail to listen before talking, which means that the PSFCH cannot be transmitted in the PSFCH time slot.
  • listen first and talk later can be performed on the candidate transmission opportunity of the next adjacent PSFCH time slot. If listen-before-talk is successfully performed on a candidate transmission opportunity of the next adjacent PSFCH time slot, the PSFCH is transmitted (the specific judgment process may correspond to the judgment process of the current PSFCH time slot). If there is still no successful listen-before-talk candidate transmission opportunity in the next adjacent PSFCH time slot, you can consider whether to continue deferring.
  • the access network device can be pre-configured with the number of delayed transmissions, and the number of delayed transmissions can be N times, N ⁇ 1.
  • the access network device can deliver the configured number of delayed transmissions through high-layer signaling (RRC or PC5-RRC) or dynamic signaling (DCI or SCI or MAC-CE or PC5MAC-CE).
  • RRC high-layer signaling
  • DCI dynamic signaling
  • SCI SCI
  • MAC-CE MAC-CE
  • PC5MAC-CE PC5MAC-CE
  • PC5MAC-CE Packet Delay Budget
  • the number of delayed sends is 3.
  • the current PSFCH timeslot is the 1st PSFCH times. If all candidate transmission opportunities in the current PSFCH time slot fail to listen before talking, listen before talking is performed sequentially on the candidate transmission opportunities in the adjacent second PSFCH time slot. If all candidate transmission opportunities in the second PSFCH time slot also fail to listen before talking, then listen before talking is performed sequentially on the candidate transmission opportunities in the third PSFCH time slot. If all candidate transmission opportunities in the third PSFCH slot fail to listen before talking, it is determined that the PSFCH cannot be sent because the number of delayed transmissions has been reached.
  • the access network equipment can also directly configure the number of PSFCH time slots corresponding to the Physical Sidelink Share Channel (PSSCH).
  • Access network equipment can configure the number of PSFCH time slots through high-level signaling (such as RRC signaling) or downlink control information (Downlink Control Information, DCI) or sidelink control information (Sidelink Control Information, SCI).
  • the candidate transmission opportunities that can transmit the PSFCH may be determined with reference to the method provided in the above embodiment.
  • a physical side link feedback channel sending device 30 in an embodiment of the present invention including: a receiving unit 301 and a transmitting unit 302, wherein:
  • the receiving unit 301 is configured to receive configuration information; the configuration information indicates that there are multiple candidate transmission opportunities for transmitting PSFCH in one PSFCH time slot;
  • the transmission unit 302 is configured to perform listen-before-talk on the plurality of candidate transmission opportunities in sequence, and perform PSFCH transmission on the successful listen-before-talk candidate transmission opportunities.
  • the specific execution processes of the above-mentioned receiving unit 301 and the transmitting unit 302 may refer to the above-mentioned steps S101 to S102, and will not be described again here.
  • the above-mentioned physical side link feedback channel sending device 30 may correspond to a chip with a data processing function in the user equipment, such as a baseband chip; or may correspond to The user equipment includes a chip module with a data processing function chip (such as a baseband chip), or is corresponding to the user equipment.
  • each module/unit included in each device and product described in the above embodiments may be a software module/unit or a hardware module/unit, or it may be partly a software module/unit and partly is a hardware module/unit.
  • each module/unit included therein can be implemented in the form of hardware such as circuits, or at least some of the modules/units can be implemented in the form of a software program.
  • the software program Running on the processor integrated inside the chip, the remaining (if any) modules/units can be implemented using circuits and other hardware methods; for various devices and products applied to or integrated into the chip module, each module/unit included in it can They are all implemented in the form of hardware such as circuits.
  • Different modules/units can be located in the same component of the chip module (such as chips, circuit modules, etc.) or in different components. Alternatively, at least some modules/units can be implemented in the form of software programs.
  • the software program runs on the processor integrated inside the chip module, and the remaining (if any) modules/units can be implemented using circuits and other hardware methods; for each device or product that is applied to or integrated into the terminal, each module it contains /Units can all be implemented in the form of hardware such as circuits, and different modules/units can be located in the same component (for example, chip, circuit module, etc.) or in different components within the terminal, or at least some of the modules/units can be implemented in the form of software programs.
  • the software program runs on the processor integrated inside the terminal, and the remaining (if any) modules/units can be implemented using circuits and other hardware methods.
  • Embodiments of the present invention also provide a computer-readable storage medium.
  • the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and a computer program is stored thereon.
  • the computer program is processed by a processor. During runtime, the steps of the physical side link feedback channel sending method provided by any embodiment are executed.
  • An embodiment of the present invention also provides a physical side link feedback channel sending device, which includes a memory and a processor.
  • the memory stores a computer program that can run on the processor.
  • the processor runs the computer.
  • the program executes the steps of the physical side link feedback channel sending method provided in any of the above embodiments.
  • the program can be stored in a computer-readable storage medium.
  • the storage medium can include: ROM, RAM, magnetic disk or CD, etc.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

一种物理侧链路反馈信道发送方法及装置、可读存储介质，该方法包括：接收配置信息(S101)；配置信息指示在一个PSFCH时隙内存在多个用于传输PSFCH的候选传输机会；依次在多个候选传输机会上进行先听后说，并在先听后说成功的候选传输机会上进行PSFCH传输(S102)。该方案能够提高成功传输PSFCH的概率。

Description

物理侧链路反馈信道发送方法及装置、可读存储介质
本申请要求于2022年4月29日提交中国专利局、申请号为202210468626.X、发明名称为“物理侧链路反馈信道发送方法及装置、可读存储介质”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
本发明涉及通信技术领域，尤其涉及一种物理侧链路反馈信道发送方法及装置、可读存储介质。
背景技术
目前，针对侧链路(Sidelink)的研究主要集中在授权(licensed)频谱上，1个物理侧链路反馈信道(Physical Sidelink Feedback Channel，PSFCH)占用1个物理资源块(Resource Block，RB)的频域资源，时域上占用两个正交频分多址(Orthogonal Frequency Division Multiplexing，OFDM)符号。
在后续演进过程中，可能会将侧链路应用在非授权(unlicensed)频谱上。在应用到非授权频谱上时，受限于先听后说(Listen Before Talk，LBT)的限制，可能会导致PSFCH在一些时间点上无法传输。
发明内容
本发明实施例解决的是PSFCH传输成功率较低的技术问题。
为解决上述技术问题，本发明实施例提供一种物理侧链路反馈信道PSFCH发送方法，包括：接收配置信息；所述配置信息指示在一 个PSFCH时隙内存在多个用于传输PSFCH的候选传输机会；依次在所述多个候选传输机会上进行先听后说，并在先听后说成功的候选传输机会上进行PSFCH传输。
可选的，所述配置信息指示所述候选传输机会对应的固定起始符号。
可选的，所述配置信息指示所述候选传输机会对应的起始符号为：所述PSFCH时隙内任一个符号。
可选的，所述配置信息指示所述候选传输机会对应的起始符号为：所述PSFCH时隙内第k个符号之后的任一个符号；或者，所述PSFCH时隙内从第k个符号起之后的任一个符号。
可选的，所述先听后说成功的候选传输机会对应的符号中，起始符号为自动增益控制符号或间隙符号。
可选的，所述一个PSFCH时隙内的候选传输机会个数与信道繁忙系数正相关。
可选的，所述物理侧链路反馈信道发送方法还包括：获取最大延迟发送次数。
可选的，若一个PSFCH时隙内所有的候选传输机会均先听后说失败，且当前延迟发送次数小于所述最大延迟发送次数，则依次在相邻的下一个PSFCH时隙中的多个候选传输机会上进行先听后说，并在先听后说成功的候选传输机会上进行PSFCH传输。
可选的，所述最大延迟发送次数与发送数据对应的分组延迟预算相关。
可选的，所述物理侧链路反馈信道发送方法还包括：获取所述配置信息所指示的PSFCH时隙的个数。
本发明实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质为非易失性存储介质或非瞬态存储介质，其上存储有计算 机程序，所述计算机程序被处理器运行时执行上述任一种所述的物理侧链路反馈信道发送方法的步骤。
本发明实施例还提供了另一种物理侧链路反馈信道发送装置，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机程序，所述处理器运行所述计算机程序时执行上述任一种所述的物理侧链路反馈信道发送方法的步骤。
与现有技术相比，本发明实施例的技术方案具有以下有益效果：
通过配置在一个时隙内对应多个PSFCH传输机会，可以增加在该时隙内LBT成功的概率，进而提高成功传输PSFCH的概率。
附图说明
图1是本发明实施例中的一种物理侧链路反馈信道发送方法的流程图；
图2是现有的一种PSFCH在时隙中的结构示意图；
图3是本发明实施例中的一种物理侧链路反馈信道发送装置的结构示意图。
具体实施方式
现有技术中，如图2所示，在现有技术中，PSFCH占用两个符号，两个符号传递的信息完全相同，其中第一个符号可以用于自动增益控制(AGC)，在两个符号的前后各有一个间隙(gap)符号。此外，PSFCH是周期性配置的。下述描述中，我们把第一个符号称为PSFCH的自动增益控制符号(AGC symbol)。
也就是说，在现有技术中，1个时隙中最多仅存在1次PSFCH传输机会。若在这个时隙上为了传输PSFCH的LBT失败，则在该时隙无法实现PSFCH的传输。
在本发明实施例中，通过配置或者定义在一个时隙内对应多个PSFCH传输机会，可以增加在该时隙内LBT成功的概率，进而提高成功传输PSFCH的概率。
为使本发明的上述目的、特征和有益效果能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。
本发明实施例提供了一种物理侧链路反馈信道发送方法，参照图1，以下通过具体步骤进行详细说明。
在具体实施中，下述步骤S101～步骤S102所记载的物理侧链路反馈信道发送方法可以由用户设备中具有数据处理功能的芯片所执行，也可以由用户设备中包含有数据处理功能的芯片的芯片模组来执行。
步骤S101，接收配置信息。
在具体实施中，接入网设备可以向终端设备下发配置信息，配置信息可以用于指示在一个PSFCH时隙(slot)内存在多个用于传输PSFCH的候选传输机会。
终端设备可以接收接入网设备下发的配置信息，从而获知一个PSFCH时隙内的多个候选传输机会对应的起始符号，从而可以获知可能使用哪些符号(symbol)进行。
在本发明实施例中，在配置信息中，可以直接指示哪些符号为候选传输机会对应的起始符号。
例如，配置信息指示在1个PSFCH时隙内，用于传输PSFCH的候选传输机会的起始符号为第2个符号、第4个符号、第6个符号、第8个符号以及第10个符号。
在本发明实施例中，在配置信息中，也可以指示1个PSFCH时隙内的任意一个符号为候选传输机会对应的起始符号。
在配置信息中，还可以指示在1个PSFCH时隙内的第k个符号 之后的任意一个符号为候选传输机会对应的起始符号。或者，指示在1个PSFCH时隙内的第k个符号及第k个符号之后的任一个符号为候选传输机会对应的起始符号。
在本发明实施例中，接入网设备可以通过高层信令向终端设备下发配置信息，高层信令可以为无线资源控制(Radio Resource Control，RRC)信令或者PC5-RRC信令。本领域技术人员可以理解，高层信令还可以为其他类型的信令，此处不做赘述。
在本发明实施例中，接入网设备也可以通过动态信令向终端设备下发配置信息，动态信令可以为下行控制信息(DCI)、MAC-CE、SCI、PC5-MAC-CE中的任一。
步骤S102，依次在多个候选传输机会上进行先听后说，并在先听后说成功的候选传输机会上进行PSFCH传输。
在本发明实施例中，在根据配置信息确定一个PSFCH时隙内的多个候选传输机会后，用户设备可以依次在多个候选传输机会对应的符号上进行先听后说。并在先听后说成功的候选传输机会对应的符号上传输PSFCH。
在本发明实施例中，对应于候选传输机会，若在某一个候选传输机会对应的符号上成功进行先听后说，则在传输PSFCH时，该候选传输机会对应的起始符号可以为PSFCH的自动增益控制符号(AGC symbol)，也可以为自动增益控制符号之前的间隙符号(Gap symbol)。
在具体实施中，间隙符号可以通过扩展循环前缀(Cyclic Prefix Extenstion，CPE)的方式来控制实际间隙的大小。
下面通过举例对本发明实施例中提供的PSFCH发送方法进行说明。
设定配置信息指示在1个PSFCH时隙内，用于传输PSFCH的候选传输机会的起始符号为第2个符号、第4个符号、第6个符号。此时，在1个PSFCH时隙内实质上存在3次PSFCH的候选传输机会。
在第1个候选传输机会，其起始符号为PSFCH时隙中的第2个符号。
若检测到在第2个符号上先听后说成功，则从第2个符号开始传输PSFCH。具体来说，PSFCH时隙中的第2个符号为PSFCH的AGC symbol，PSFCH时隙中的第3个符号用于传输PSFCH，PSFCH时隙中的第4个符号可以为Gap symbol。
或者，若检测到在第2个符号上先听后说成功，则PSFCH时隙中的第2个符号为Gap symbol，PSFCH时隙中的第3个符号用于传输PSFCH，PSFCH时隙中的第4个符号为AGC symbol，PSFCH时隙中的第5个符号为Gap symbol。
也就是说，若检测到在第2个符号上先听后说成功，则进行PSFCH的传输，PSFCH时隙中的第4个符号、第6个符号不再用于传输PSFCH，而是可以传输其他的数据。
若在第2个符号上先听后说失败，则判定第1个候选传输机会无法传输PSFCH，则可以进一步判断第4个符号上是否先听后说成功。
若检测到在第4个符号上先听后说成功，则从第4个符号开始传输PSFCH。具体来说，则PSFCH时隙中的第4个符号为PSFCH的AGC symbol，PSFCH时隙中的第5个符号用于传输PSFCH，PSFCH时隙中的第6个符号为Gap symbol。
或者，若检测到在第4个符号上先听后说成功，则PSFCH时隙中的第4个符号为Gap symbol，PSFCH时隙中的第5个符号用于传输PSFCH，PSFCH时隙中的第6个符号为AGC symbol，PSFCH时隙中的第7个符号为Gap symbol。
也就是说，若检测到在第4个符号上先听后说成功，则进行PSFCH的传输，PSFCH时隙中的第6个符号不再用于传输PSFCH，而是可以传输其他的数据。
若在第4个符号上仍先听后说失败，则判定第1个候选传输机会 以及第2个候选传输机会均无法传输PSFCH，则可以进一步判断第6个符号上是否先听后说成功。
若检测到在第6个符号上先听后说成功，则从第6个符号开始传输PSFCH。具体来说，则PSFCH时隙中的第6个符号为PSFCH的AGC symbol，PSFCH时隙中的第7个符号用于传输PSFCH，PSFCH时隙中的第8个符号为Gap symbol。
或者，若检测到在第6个符号上先听后说成功，则PSFCH时隙中的第6个符号为Gap symbol，PSFCH时隙中的第7个符号用于传输PSFCH，PSFCH时隙中的第8个符号为AGC symbol，PSFCH时隙中的第9个符号为Gap symbol。
由上述示例可知，在一个PSFCH时隙中，若在先的候选传输机会能够用于PSFCH传输，则在后的候选传输机会可以不再用于PSFCH传输，而是用作其他用途，从而提高数据传输效率。
PFSCH的传输可以起始于在1个时隙或者1个PSFCH时隙中最先LBT成功的PSFCH可选起始符号上。
作为一个变化例，PSFCH在一个时隙中可以传输的起始符号可以是1个时隙中的任意符号，或者可以通过预定义的方式确定是一个时隙中1个或者若干个符号。
作为一个变化例，PSFCH在一个时隙中可以传输的起始符号可以是1个PSFCH时隙中的任意符号，或者可以通过预定义的方式确定是一个PSFCH时隙中1个或者若干个符号。其中，PSFCH时隙指的是根据高层信令配置的PSFCH的周期和或偏移信息确定的用于发送PSFCH的时隙。
在具体实施中，一个PSFCH时隙内PSFCH的候选传输机会可以与信道繁忙系数(CBR)正相关。信道繁忙系数越大，表征信道越拥挤。由于信道越繁忙，意味着先听后说的成功率可能较低，为提高PSFCH传输的成功率，在一个PSFCH时隙内可以设置更多的候选传 输机会。
在本发明实施例中，可以预先设置或者通过高层信令(如RRC或者PC5-RRC)或者动态信令(如DCI或者SCI或者MAC-CE或者PC5-MAC-CE)配置信道繁忙系数与候选传输机会个数的映射关系。在具体应用时，可以根据当前信道繁忙系数，从预设的映射关系中确定候选传输机会的个数。
例如，设定信道繁忙系数的取值处于0～i时，一个PSFCH时隙内的候选传输机会个数为1个；信道繁忙系数的取值处于i～j时，一个PSFCH时隙内的候选传输机会个数为3个；信道繁忙系数的取值为j～1时，一个PSFCH时隙内的候选传输机会的个数为5个；0＜i＜j＜1。
可以理解的是，上述一个PSFCH时隙内的候选传输机会的个数与信道繁忙系数的举例仅为示意性说明。在具体实施中，可以根据实际的应用场景进行相应的设定，并不局限于上述示例。
在具体实施中，可能会存在如下场景：在一个PSFCH时隙内的所有候选传输机会均先听后说失败，意味着在该PSFCH时隙内无法传输PSFCH。针对上述场景，在本发明实施例中，可以在临近的下一个PSFCH时隙的候选传输机会上进行先听后说。如果在临近的下一个PSFCH时隙的某一个候选传输机会上成功进行先听后说，则传输PSFCH(具体的判断过程可以对应参照当前PSFCH时隙的判断过程)。若在临近的下一个PSFCH时隙仍不存在先听后说成功的候选传输机会，则可以考虑是否继续顺延。
在具体实施中，接入网设备可以预先配置延迟发送次数，延迟发送次数可以为N次，N≥1。接入网设备可以通过高层信令(RRC或者PC5-RRC)或者动态信令(DCI或者SCI或者MAC-CE或者PC5MAC-CE)下发所配置的延迟发送次数，延迟发送次数可以与发送数据的服务质量参数中的分组延迟预算(Packet Delay Budget，PDB)相关。
例如，延迟发送次数为3。当前PSFCH时隙为第1个PSFCH次数。在当前PSFCH时隙中的所有候选传输机会均先听后说失败，则在相邻的第2个PSFCH时隙中的候选传输机会上依次进行先听后说。若在第2个PSFCH时隙中的所有候选传输机会也均先听后说失败，则在第3个PSFCH时隙中的候选传输机会上依次进行先听后说。若在第3个PSFCH时隙中的所有候选传输机会均先听后说失败，则由于已经达到延迟发送次数，故确定无法发送PSFCH。
在具体实施中，接入网设备也可以直接配置物理侧链路共享信道(Physical Sidelink Share Channel，PSSCH)对应的PSFCH时隙的个数。接入网设备可以通过高层信令(如RRC信令)或者下行控制信息(Downlink Control Information，DCI)或者侧链路控制信息(Sidelink Control Information，SCI)配置PSFCH时隙的个数。在所配置的PSFCH时隙内，可以参照上述实施例中提供的方法，来确定能够传输PSFCH的候选传输机会。
由此可见，通过配置在一个PSFCH时隙内对应多个PSFCH传输机会，可以增加在该PSFCH时隙内先听后说成功的概率，进而提高成功传输PSFCH的概率。
参照图3，给出了本发明实施例中的一种物理侧链路反馈信道发送装置30，包括：接收单元301、传输单元302，其中：
接收单元301，用于接收配置信息；所述配置信息指示在一个PSFCH时隙内存在多个用于传输PSFCH的候选传输机会；
传输单元302，用于依次在所述多个候选传输机会上进行先听后说，并在先听后说成功的候选传输机会上进行PSFCH传输。
在具体实施中，上述接收单元301、传输单元302的具体执行过程可以对应参照上述步骤S101～步骤S102，此处不做赘述。
在具体实施中，上述的物理侧链路反馈信道发送装置30可以对应于用户设备中具有数据处理功能的芯片，如基带芯片；或者对应于 用户设备中包括具有数据处理功能的芯片(如基带芯片)的芯片模组，或者对应于用户设备。
在具体实施中，关于上述实施例中描述的各个装置、产品包含的各个模块/单元，其可以是软件模块/单元，也可以是硬件模块/单元，或者也可以部分是软件模块/单元，部分是硬件模块/单元。
例如，对于应用于或集成于芯片的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于芯片内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现；对于应用于或集成于芯片模组的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，不同的模块/单元可以位于芯片模组的同一组件(例如芯片、电路模块等)或者不同组件中，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于芯片模组内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现；对于应用于或集成于终端的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，不同的模块/单元可以位于终端内同一组件(例如，芯片、电路模块等)或者不同组件中，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于终端内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现。
本发明实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质为非易失性存储介质或非瞬态存储介质，其上存储有计算机程序，所述计算机程序被处理器运行时执行任一实施例所提供的物理侧链路反馈信道发送方法的步骤。
本发明实施例还提供了一种物理侧链路反馈信道发送装置，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机程序，所述处理器运行所述计算机程序时执行上述任一实施例所提供的物理侧链路反馈信道发送方法的步骤。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指示相关的硬件来完成，该程序可以存储于一计算机可读存储介质中，存储介质可以包括：ROM、RAM、磁盘或光盘等。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (13)

  1. 一种物理侧链路反馈信道PSFCH发送方法，其特征在于，包括：接收配置信息；所述配置信息指示在一个PSFCH时隙内存在多个用于传输PSFCH的候选传输机会；
    依次在所述多个候选传输机会上进行先听后说，并在先听后说成功的候选传输机会上进行PSFCH传输。
  2. 如权利要求1所述的物理侧链路反馈信道发送方法，其特征在于，所述配置信息指示所述候选传输机会对应的固定起始符号。
  3. 如权利要求1所述的物理侧链路反馈信道发送方法，其特征在于，所述配置信息指示所述候选传输机会对应的起始符号为：所述PSFCH时隙内任一个符号。
  4. 如权利要求1所述的物理侧链路反馈信道发送方法，其特征在于，所述配置信息指示所述候选传输机会对应的起始符号为：所述PSFCH时隙内第k个符号之后的任一个符号；或者，所述PSFCH时隙内从第k个符号起之后的任一个符号。
  5. 如权利要求2～4任一项所述的物理侧链路反馈信道发送方法，其特征在于，所述先听后说成功的候选传输机会对应的符号中，起始符号为自动增益控制符号或间隙符号。
  6. 如权利要求1所述的物理侧链路反馈信道发送方法，其特征在于，所述一个PSFCH时隙内的候选传输机会个数与信道繁忙系数正相关。
  7. 如权利要求1所述的物理侧链路反馈信道发送方法，其特征在于，还包括：
    获取最大延迟发送次数。
  8. 如权利要求7所述的物理侧链路反馈信道发送方法，其特征在于，还包括：
    若一个PSFCH时隙内所有的候选传输机会均先听后说失败，且当前延迟发送次数小于所述最大延迟发送次数，则依次在相邻的下一个PSFCH时隙中的多个候选传输机会上进行先听后说，并在先听后说成功的候选传输机会上进行PSFCH传输。
  9. 如权利要求7所述的物理侧链路反馈信道发送方法，其特征在于，所述最大延迟发送次数与发送数据对应的分组延迟预算相关。
  10. 如权利要求1所述的物理侧链路反馈信道发送方法，其特征在于，还包括：获取所述配置信息所指示的PSFCH时隙的个数。
  11. 一种物理侧链路反馈信道PSFCH发送装置，其特征在于，包括：接收单元，用于接收配置信息；所述配置信息指示在一个PSFCH时隙内存在多个用于传输PSFCH的候选传输机会；
    传输单元，用于依次在所述多个候选传输机会上进行先听后说，并在先听后说成功的候选传输机会上进行PSFCH传输。
  12. 一种计算机可读存储介质，所述计算机可读存储介质为非易失性存储介质或非瞬态存储介质，其上存储有计算机程序，其特征在于，所述计算机程序被处理器运行时执行权利要求1～10任一项所述的物理侧链路反馈信道发送方法的步骤。
  13. 一种物理侧链路反馈信道发送装置，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机程序，其特征在于，所述处理器运行所述计算机程序时执行权利要求1～10任一项所述的物理侧链路反馈信道发送方法的步骤。
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