WO2021030992A1 - 一种sfci的发送方法以及装置 - Google Patents

一种sfci的发送方法以及装置 Download PDF

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Publication number
WO2021030992A1
WO2021030992A1 PCT/CN2019/101155 CN2019101155W WO2021030992A1 WO 2021030992 A1 WO2021030992 A1 WO 2021030992A1 CN 2019101155 W CN2019101155 W CN 2019101155W WO 2021030992 A1 WO2021030992 A1 WO 2021030992A1
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Prior art keywords
terminal device
sfci
resource
index
frequency domain
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PCT/CN2019/101155
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English (en)
French (fr)
Inventor
张锦芳
苏宏家
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华为技术有限公司
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Priority to CN201980098572.9A priority Critical patent/CN114128327B/zh
Priority to PCT/CN2019/101155 priority patent/WO2021030992A1/zh
Publication of WO2021030992A1 publication Critical patent/WO2021030992A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a method and device for sending sidelink feedback control information (SFCI).
  • SFCI sidelink feedback control information
  • a multicast group can include at least two receiving terminals and one sending terminal.
  • the sending terminal can send messages to the multicast group at the same time through the physical sidelink shared channel (PSSCH) on the SL.
  • PSSCH physical sidelink shared channel
  • the third generation partnership project defines a physical side-link feedback channel (PSFCH) for the side link.
  • the PSFCH can be used to send SFCI
  • the SFCI can at least include the information that the receiving terminal feeds back to the sending terminal whether the side line data is successfully received.
  • the receiving terminal can send SFCI to the sending terminal on the PSFCH channel according to the reception of the sideline data; after receiving the SFCI, the sending terminal can select the appropriate side line according to the SFCI.
  • the line communication resource reschedules the side line data or newly transmits the side line data to improve the transmission success rate of the side line data, thereby improving the reliability of the side line communication and reducing the communication delay.
  • the prior art does not specify how multiple receiving terminals send SFCI to the sending terminal on the same feedback resource in the multicast communication scenario of the V2X communication system, which affects the sending terminal's feedback of SFCI to the receiving terminal.
  • the embodiments of the present application provide a method and device for sending SFCI to solve the problem of multiple receiving terminals sending SFCI under multicast communication.
  • a method for sending SFCI may include: a first terminal device receives sideline data including M first resource units from a second terminal device, and according to the transmission resource of the received sideline data, Determine the available PSFCH feedback resources including P second resource units, according to the available PSFCH feedback resources, the index U index of the first terminal device, and the number of orthogonal code sequences that can be multiplexed in the X second resource units, Determine the frequency domain resource used to send the SFCI, and send the SFCI to the second terminal device according to the frequency domain resource used to send the SFCI; X is the number of second resource units required to send the SFCI, and X is an integer greater than or equal to 1;
  • the SFCI is used to at least indicate whether the first terminal device correctly receives the side line data.
  • the first terminal device sends the data once through the index of the first terminal device.
  • Information such as the size of the resource unit required by SFCI and the available orthogonal code sequence determines the frequency domain start position and frequency domain bandwidth of the available PSFCH feedback resource for the SFCI sent by the first terminal device to the second terminal device, and the frequency domain bandwidth used for sending the SFCI
  • the orthogonal code sequence realizes SFCI feedback of multiple first terminal devices in multicast communication, especially ACK/NACK feedback, and solves the problem that the existing frequency domain resources cannot be determined for the SFCI fed back by terminal devices in the multicast communication scenario.
  • the frequency domain resources used to send SFCI include the frequency domain start position of the frequency domain resources used to send SFCI
  • the first terminal device uses the available PSFCH feedback resources and the first terminal
  • the index value U index of the device, the number of orthogonal code sequences that can be multiplexed in the X second resource units, and the determination of the frequency domain resources used to send the SFCI include: The number of orthogonal code sequences that can be multiplexed and the number of orthogonal code sequences required to transmit SFCI are determined to determine the number K of terminal devices that can transmit SFCI in X second resource units;
  • the index value U index , the number K of terminal devices that can transmit SFCI in X second resource units determine that the frequency domain start position of the frequency domain resource used to transmit SFCI is the first available PSFCH feedback resource A second resource unit.
  • the frequency domain start position of the frequency domain resource used to send the SFCI can be determined according to the index of the first terminal
  • the first terminal device sends the SFCI to the second terminal device according to the frequency domain resources used to send the SFCI, including:
  • the second resource units are the first X second resource units, and the SFCI is sent to the second terminal device through one PSFCH.
  • the first terminal device can send the SFCI once to the second terminal device on the PSFCH feedback resource, so that multiple terminals in the multicast group multiplex their own SFCI on the PSFCH feedback resource and send it to the second terminal device. Terminal device.
  • the method further includes: the first terminal device according to the index value U index of the first terminal device and the X number of second resource units
  • the number L of orthogonal code sequences that can be reused is determined to be the orthogonal code sequence with the index mod (2 ⁇ UE index , L) and the index is mod (2 ⁇ UE index +1). , L) orthogonal code sequence.
  • the orthogonal code sequence used to send the SFCI fed back by the first terminal device is determined according to the index of the first terminal device, so that the terminals in the multicast group use different orthogonal code sequences to the second terminal device. Feedback SFCI.
  • the index value U index of the first terminal device is pre-configured; or, the index value U index of the first terminal device is configured by the second terminal device. Notify the first terminal device; or, the index value U index of the first terminal device is determined according to the SFCI sent by the receiving member in the multicast group. Based on this possible design, the index of the terminal device can be obtained in a variety of ways, and the implementation methods are flexible and diverse.
  • the present application provides a terminal device.
  • the terminal device may be a first terminal device or a chip or a system on a chip in the first terminal device, and may also be a first terminal device for implementing the first aspect or the first terminal device. Any possible design of the functional modules of the method.
  • the terminal device can implement the functions performed by the first terminal device in the foregoing aspects or various possible designs, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the aforementioned functions.
  • the terminal device includes: a receiving unit, a processing unit, and a sending unit.
  • the receiving unit is configured to receive side-line data from the second terminal device; the transmission resource of the side-line data includes M first resource units, and M is a positive integer.
  • the processing unit is configured to determine the available PSFCH feedback resource according to the transmission resource of the side row data; the available PSFCH feedback resource includes P second resource units; and according to the available PSFCH feedback resource, the index U index of the first terminal device,
  • the number of orthogonal code sequences that can be reused in the X second resource units determines the frequency domain resources used to send SFCI; X is the number of second resource units required to send SFCI; SFCI is used to at least indicate the first Whether the terminal device receives the side line data correctly.
  • the sending unit is configured to send the SFCI to the second terminal device according to the frequency domain resource used for sending the SFCI.
  • the specific implementation of the terminal device can refer to the behavior and function of the first terminal device in the SFCI sending method provided by the first aspect or any possible design of the first aspect, for example, based on the second aspect, multicast group
  • the first terminal device uses the index of the first terminal device, the size of the resource unit required to transmit the SFCI once, and the available orthogonal code Sequence and other information to determine the frequency domain start position and frequency domain bandwidth of the available PSFCH feedback resource of the SFCI sent by the first terminal device to the second terminal device, and the orthogonal code sequence used to send the SFCI, so as to realize multiple multicast communication
  • the SFCI feedback of the first terminal device especially the ACK/NACK feedback, solves the problem that the existing frequency domain resources cannot be determined for the SFCI fed back by the terminal device in the multicast communication scenario.
  • the frequency domain resources used to send SFCI include the frequency domain start position of the frequency domain resources used to send SFCI
  • the processing unit is specifically used for: according to X second resource units
  • the number of orthogonal code sequences that can be multiplexed within and the number of orthogonal code sequences required to transmit SFCI determine the number K of terminal devices that can transmit SFCI in X second resource units; according to the first terminal device
  • the index value U index the number K of terminal devices that can transmit SFCI in X second resource units, determine that the frequency domain start position of the frequency domain resource used to send SFCI is the first available PSFCH feedback resource A second resource unit.
  • the processing unit can determine the frequency domain start position of the frequency domain resource used to send the SFCI according to the index of the first terminal device, the size of the resource unit required to send the SFCI once, and the available orthogonal code sequence.
  • the sending unit is specifically used to:
  • the second resource units are the first X second resource units, and the SFCI is sent to the second terminal device through one PSFCH.
  • the sending unit may send the SFCI once to the second terminal device on the PSFCH feedback resource, so that multiple terminals in the multicast group multiplex their own SFCI on the PSFCH feedback resource and send them to the second terminal device. .
  • the processing unit is further configured to: according to the index value U index of the first terminal device and the X second resource units can be reused
  • the number of orthogonal code sequences L, the orthogonal code sequence required to send SFCI is determined to be the orthogonal code sequence with index mod(2 ⁇ UE index , L) and the index is mod(2 ⁇ UE index +1, L)
  • the orthogonal code sequence is determined to be the orthogonal code sequence with index mod(2 ⁇ UE index , L) and the index is mod(2 ⁇ UE index +1, L) The orthogonal code sequence.
  • the processing unit can determine the orthogonal code sequence used to send the SFCI fed back by the first terminal device according to the index of the first terminal device, so that the terminals in the multicast group use different orthogonal code sequences to send the Two terminal devices feed back SFCI.
  • the index value U index of the first terminal device is pre-configured; or, the index value U index of the first terminal device is configured by the second terminal device. Notify the first terminal device; or, the index value U index of the first terminal device is determined according to the SFCI sent by the receiving member in the multicast group. Based on this possible design, the index of the terminal device can be obtained in a variety of ways, and the implementation methods are flexible and diverse.
  • a terminal device may be a first terminal device or a chip or a system on a chip in the first terminal device.
  • the terminal device can implement the above-mentioned aspects or functions performed by the first terminal device in each possible design.
  • the functions can be implemented by hardware.
  • the terminal device may include: a processor and a transceiver. Device.
  • the processor receives sideline data including M first resource units from the second terminal device through the transceiver, and determines available PSFCH feedback resources according to the transmission resources of the sideline data; the available PSFCH feedback resources include P second resource units And according to the available PSFCH feedback resources, the index U index of the first terminal device, and the number of orthogonal code sequences that can be multiplexed in the X second resource units to determine the frequency domain resources used to send the SFCI; To send the frequency domain resources of the SFCI, the SFCI is sent to the second terminal device through the transceiver; X is the number of second resource units required to send the SFCI; the SFCI is used to at least indicate whether the first terminal device correctly receives the sideline data.
  • the terminal device may further include a memory, and the memory is used to store necessary computer execution instructions and data of the terminal device.
  • the processor executes the computer-executable instructions stored in the memory, so that the terminal device executes the SFCI sending method described in the first aspect or any one of the possible designs of the first aspect.
  • a computer-readable storage medium may be a readable non-volatile storage medium.
  • the computer-readable storage medium stores computer instructions or programs. During operation, the computer can execute the SFCI sending method described in the first aspect or any one of the possible designs of the foregoing aspects.
  • a computer program product containing instructions which when running on a computer, enables the computer to execute the SFCI sending method described in the first aspect or any one of the possible designs of the foregoing aspects.
  • a terminal device may be a first terminal device or a chip or a system on a chip in the first terminal device.
  • the terminal device includes one or more processors and one or more memories.
  • the one or more memories are coupled with the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions.
  • the terminal device is caused to execute the SFCI sending method described in the first aspect or any possible design of the first aspect.
  • the technical effects brought about by any one of the design methods of the third aspect to the sixth aspect may refer to the technical effects brought about by the above-mentioned first aspect or any possible design of the first aspect, and will not be repeated.
  • a second terminal device sends sideline data including M first resource units to a first terminal device, and determines that it includes P
  • the available PSFCH feedback resources of the second resource units are determined to be used according to the available PSFCH feedback resources, the index U index of the first terminal device, and the number of orthogonal code sequences that can be multiplexed in the X second resource units.
  • the frequency domain resource for sending SFCI, the SFCI from the first terminal device is received on the frequency domain resource for sending SFCI;
  • X is the number of second resource units required to send SFCI, and SFCI is used to indicate at least the first terminal device Whether the side line data is received correctly.
  • the second terminal device of the multicast side line data in the multicast group determines the available PSFCH feedback resource according to the transmission resource of the side line data, it needs to send the SFCI once through the index of the first terminal device.
  • the size of the resource unit and the available orthogonal code sequence information determine the frequency domain start position and frequency domain bandwidth of the available PSFCH feedback resource for the SFCI sent by the first terminal device to the second terminal device, and the orthogonality used to send the SFCI Code sequence, receive SFCI from the first terminal device according to the determination result, realize the SFCI feedback of multiple first terminal devices in multicast communication, especially ACK/NACK feedback, and solve the problem that the current terminal device cannot feedback for the multicast communication scenario
  • the SFCI determines the frequency domain resource problem.
  • the frequency domain resource used to send the SFCI includes the frequency domain start position of the frequency domain resource used to send the SFCI, and the second terminal device According to the available PSFCH feedback resources, the index value U index of the first terminal device, and the number of orthogonal code sequences that can be multiplexed in the X second resource units, the frequency domain resource used to send the SFCI is determined, including: The number of orthogonal code sequences that can be multiplexed in each second resource unit and the number of orthogonal code sequences required to transmit SFCI, determine the number K of terminal devices that can transmit SFCI in X second resource units; According to the index value U index of the first terminal device and the number K of terminal devices that can transmit SFCI in X second resource units, determine that the frequency domain start position of the frequency domain resource used to send SFCI is an available PSFCH feedback Resources A second resource unit. Based on this possible design, the frequency domain start position of the frequency domain resource
  • the second terminal device receives the SFCI from the first terminal device on the frequency domain resources used for sending and sending SFCI, including:
  • the second terminal device is
  • the second resource units are the first X second resource units, and the SFCI from the first terminal device is received through one PSFCH.
  • the second terminal device can receive one SFCI sent by the first terminal device on the PSFCH feedback resource.
  • the method further includes: the second terminal device according to the index value U index of the first terminal device and the X number of second resource units
  • the number L of orthogonal code sequences that can be reused is determined to be the orthogonal code sequence with the index mod (2 ⁇ UE index , L) and the index is mod (2 ⁇ UE index +1). , L) orthogonal code sequence.
  • the orthogonal code sequence used to send the SFCI fed back by the first terminal device is determined according to the index of the first terminal device, so that the terminals in the multicast group use different orthogonal code sequences to the second terminal device. Feedback SFCI.
  • the index value U index of the first terminal device is pre-configured; or, the index value U index of the first terminal device is configured by the second terminal device. Configuration; or, the index value U index of the first terminal device is determined according to the SFCI sent by the receiving member in the multicast group. Based on this possible design, the index of the terminal device can be obtained in a variety of ways, and the implementation methods are flexible and diverse.
  • the present application provides a terminal device.
  • the terminal device may be a second terminal device or a chip or a system on a chip in the second terminal device, and may also be a second terminal device for implementing the seventh aspect or the seventh aspect. Any possible design of the functional modules of the method.
  • the terminal device can implement the functions performed by the second terminal device in the foregoing aspects or various possible designs, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the aforementioned functions.
  • the terminal device may include: a sending unit, a processing unit, and a receiving unit;
  • the sending unit is configured to send side row data including M first resource units to the first terminal device.
  • the processing unit is configured to determine the available PSFCH feedback resource according to the transmission resource of the side row data; the available PSFCH feedback resource includes P second resource units; and according to the available PSFCH feedback resource, the index U index of the first terminal device,
  • the number of orthogonal code sequences that can be reused in the X second resource units determines the frequency domain resources used to send SFCI; X is the number of second resource units required to send SFCI; SFCI is used to at least indicate the first Whether the terminal device receives the side line data correctly.
  • the receiving unit is configured to receive the SFCI from the first terminal device in the frequency domain resource used to send the SFCI.
  • the specific implementation of the terminal device may refer to the behavior and function of the second terminal device in the SFCI sending method provided by the seventh aspect or any one of the possible designs of the seventh aspect, and any of the seventh aspect or the seventh aspect.
  • This possible design method can be implemented by the processing unit and the sending unit included in the terminal device. For example: after the second terminal device of the eighth party determines the available PSFCH feedback resource according to the transmission resource of the sideline data, it uses the index of the first terminal device, the size of the resource unit required to transmit the SFCI once, and the available orthogonal code sequence, etc.
  • the processing unit is specifically configured to: according to the number of orthogonal code sequences that can be multiplexed in the X second resource units and the number of orthogonal code sequences required to transmit SFCI Number, determine the number K of terminal devices that can transmit SFCI in X second resource units; according to the index value U index of the first terminal device, the number of terminal devices that can transmit SFCI in X second resource units K, determine the frequency domain start position of the frequency domain resource used to send SFCI as the first available PSFCH feedback resource A second resource unit. Based on this possible design, the processing unit can determine the frequency domain start position of the frequency domain resource used to send the SFCI according to the index of the first terminal device, the size of the resource unit required to send the SFCI once, and the available orthogonal code sequence.
  • the receiving unit is specifically used for:
  • the second resource units are the first X second resource units, and the SFCI from the first terminal device is received through one PSFCH. Based on this possible design, the receiving unit can receive one SFCI sent by the first terminal device on the PSFCH feedback resource.
  • the processing unit is further configured to be reusable according to the index value U index of the first terminal device and the X second resource units
  • the number of orthogonal code sequences L, the orthogonal code sequence required to send SFCI is determined to be the orthogonal code sequence with index mod(2 ⁇ UE index , L) and the index is mod(2 ⁇ UE index +1, L)
  • the orthogonal code sequence is determined to be the orthogonal code sequence with index mod(2 ⁇ UE index , L) and the index is mod(2 ⁇ UE index +1, L)
  • the processor can determine the orthogonal code sequence used to send the SFCI fed back by the first terminal device according to the index of the first terminal device, so that the terminals in the multicast group use different orthogonal code sequences to the first terminal device. Two terminal devices feed back SFCI.
  • the index value U index of the first terminal device is pre-configured; or the index value U index of the first terminal device is configured by the second terminal device.
  • Device configuration; or, the index value U index of the first terminal device is determined according to the SFCI sent by the receiving member in the multicast group. Based on this possible design, the index of the terminal device can be obtained in a variety of ways, and the implementation methods are flexible and diverse.
  • a terminal device may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the terminal device can implement the above-mentioned aspects or functions performed by the second terminal device in each possible design.
  • the functions can be implemented by hardware.
  • the terminal device may include: a processor and a transceiver. Device.
  • the processor sends sideline data including M first resource units to the first terminal device through the transceiver, and determines available PSFCH feedback resources according to the transmission resources of the sideline data; the available PSFCH feedback resources include P second resource units And according to the available PSFCH feedback resources, the index U index of the first terminal device, and the number of orthogonal code sequences that can be multiplexed in the X second resource units, the frequency domain resources used to send the SFCI are determined, which is used for The frequency domain resources for sending the SFCI are received by the transceiver from the first terminal device; X is the number of second resource units required for sending the SFCI; the SFCI is used to at least indicate whether the first terminal device correctly receives the sideline data.
  • the terminal device may further include a memory, and the memory is used to store necessary computer execution instructions and data of the terminal device.
  • the processor executes the computer-executable instructions stored in the memory, so that the terminal device executes the SFCI sending method described in the seventh aspect or any one of the possible designs of the seventh aspect.
  • a computer-readable storage medium may be a readable non-volatile storage medium, and the computer-readable storage medium stores computer instructions when it runs on a computer. , So that the computer can execute the SFCI sending method described in the seventh aspect or any one of the possible designs of the foregoing aspects.
  • a computer program product containing instructions which when running on a computer, enables the computer to execute the SFCI sending method described in the seventh aspect or any possible design of the foregoing aspects.
  • a terminal device In a twelfth aspect, a terminal device is provided.
  • the terminal device may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the terminal device includes one or more processors and one or more memories. .
  • the one or more memories are coupled with the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions.
  • the terminal device is caused to execute the SFCI sending method according to the seventh aspect or any possible design of the seventh aspect.
  • a method for sending SFCI may include: a first terminal device receives sideline data including M first resource units from a second terminal device, and according to the transmission resource of the received sideline data Determine the available PSFCH feedback resources including P second resource units, according to the available PSFCH feedback resources, the number of receiving members Q in the multicast group, the index value U index of the first terminal device, and X second resource units The number of orthogonal code sequences that can be multiplexed within, the frequency domain resource used to send SFCI and the number of repeated transmissions of SFCI are determined, and the frequency domain resource used to send SFCI and the number of repeated transmissions of SFCI are sent to the second terminal device.
  • Repeat sending SFCI; X is the number of second resource units required to send SFCI, and X is an integer greater than or equal to 1; SFCI is used to at least indicate whether the first terminal device correctly receives the side row data.
  • the first terminal device in the multicast group determines the available PSFCH feedback resource according to the transmission resource of the received sideline data
  • the first terminal device sends the SFCI once through the index of the terminal device
  • Information such as the size of the required resource unit, the available orthogonal code sequence, and the number of members in the multicast group is determined to determine the frequency domain starting position of the SFCI sent by the first terminal device to the second terminal device in the available PSFCH feedback resource and Frequency domain bandwidth, orthogonal code sequence used to send SFCI, realize SFCI feedback of multiple first terminal devices in multicast communication, especially ACK/NACK feedback, solve the existing SFCI that cannot be fed back for terminal devices in multicast communication scenarios Determine the problem of frequency domain resources.
  • using PSFCH feedback resources to repeatedly send SFCI to the sending terminal to improve transmission reliability.
  • occupying continuous frequency domain resources when SFCI is repeatedly transmitted can further reduce power impact and improve SFCI transmission reliability.
  • the frequency domain resources used to send SFCI include the frequency domain start position of the frequency domain resources used to send SFCI, and the first terminal device feeds back resources and multicasts according to the available PSFCH
  • the number of repeated transmissions includes: the first terminal device determines that it can be used in X second resource units according to the number of orthogonal code sequences that can be multiplexed in the X second resource units and the number of orthogonal codes required to transmit SFCI
  • the frequency domain resource for sending SFCI can be determined according to the index of the first terminal device, the size of the resource unit required to send SFCI once, the number of receiving members in the multicast group, and the available orthogonal code sequence The frequency domain starting position of and the number of repeated transmissions of the SFCI, so that the terminals in multiple multicast groups use different orthogonal code sequences to repeatedly feed back the SFCI to the second terminal device.
  • the method further includes: the first terminal device according to the index value U index of the first terminal device and X second resources
  • the number of orthogonal code sequences that can be multiplexed in the unit L, the orthogonal code sequence required to send SFCI is determined to be the orthogonal code sequence with index mod(2 ⁇ UE index , L) and the index is mod(2 ⁇ UE index +1, L) orthogonal code sequence.
  • the orthogonal code sequence used to send the SFCI fed back by the first terminal device is determined according to the index of the first terminal device, so that the terminals in the multicast group use different orthogonal code sequences to the second terminal device. Feedback SFCI.
  • the index value U index of the first terminal device is pre-configured; or, the index value U index of the first terminal device is set from the second The terminal device notifies the first terminal device; or, the index value U index of the first terminal device is determined according to the SFCI sent by the receiving member in the multicast group. Based on this possible design, the index of the terminal device can be obtained in a variety of ways, and the implementation methods are flexible and diverse.
  • the number of receiving members in the multicast group is notified to the first terminal device by the second terminal device. Based on this possible design, the first terminal device can obtain the number of receiving members in the multicast group from the second terminal device, which is simple and easy.
  • the present application provides a terminal device.
  • the terminal device may be a first terminal device or a chip or a system on a chip in the first terminal device, and may also be a first terminal device for implementing the thirteenth aspect or Any possible design of the thirteenth aspect is a functional module of the method.
  • the terminal device can implement the functions performed by the first terminal device in the foregoing aspects or various possible designs, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the aforementioned functions.
  • the terminal device includes: a receiving unit, a processing unit, and a sending unit.
  • the receiving unit is configured to receive side row data including M first resource units from the second terminal device.
  • the processing unit is used to determine the available PSFCH feedback resources including P second resource units according to the transmission resources of the received side row data, and according to the available PSFCH feedback resources, the number of receiving members in the multicast group Q, and the first
  • the number of the second resource unit; SFCI is used to at least indicate whether the first terminal device correctly receives the side line data.
  • the sending unit is configured to repeatedly send the SFCI to the second terminal device according to the frequency domain resource used to send the SFCI and the number of repeated sending of the SFCI.
  • the specific implementation of the terminal device can refer to the behavior function of the first terminal device in the SFCI sending method provided by the thirteenth aspect or any one of the possible designs of the thirteenth aspect, the thirteenth aspect or the thirteenth aspect.
  • Any possible design method of the aspect can be implemented correspondingly by the processing unit and the sending unit included in the terminal device, and details are not repeated here. Therefore, the terminal device can achieve the same beneficial effects as the thirteenth aspect or any possible design of the thirteenth aspect.
  • the frequency domain resources used to send SFCI include the frequency domain start position of the frequency domain resources used to send SFCI; the processing unit is specifically configured to: according to X second resources The number of orthogonal code sequences that can be multiplexed in a unit and the number of orthogonal codes required to transmit SFCI are determined to determine the number K of terminal devices that can transmit SFCI in X second resource units; according to the multicast group The number Q of receiving members and the number K of terminal devices that can transmit SFCI in X second resource units determine the number of second resource units required for all receiving members to transmit SFCI to the second terminal device once.
  • the processing unit can determine the frequency for sending SFCI according to the index of the first terminal device, the size of the resource unit required to send SFCI once, the number of receiving members in the multicast group, and the available orthogonal code sequence.
  • the sending unit can repeatedly send the SFCI to the second terminal device multiple times on the PSFCH feedback resource to improve the transmission reliability of the SFCI.
  • the processing unit is further configured to perform data recovery according to the index value U index of the first terminal device and the X second resource units.
  • the number of orthogonal code sequences used is L
  • the orthogonal code sequence required to send SFCI is determined to be the orthogonal code sequence with index mod(2 ⁇ UE index , L) and the index is mod(2 ⁇ UE index +1, L ) Orthogonal code sequence.
  • the orthogonal code sequence used to send the SFCI fed back by the first terminal device is determined according to the index of the first terminal device, so that the terminals in the multicast group use different orthogonal code sequences to the second terminal device. Feedback SFCI.
  • the index value U index of the first terminal device is pre-configured; or, the index value U index of the first terminal device is set from the second The terminal device notifies the first terminal device; or, the index value U index of the first terminal device is determined according to the SFCI sent by the receiving member in the multicast group. Based on this possible design, the index of the terminal device can be obtained in a variety of ways, and the implementation methods are flexible and diverse.
  • the number of receiving members in the multicast group is notified to the first terminal device by the second terminal device. Based on this possible design, the first terminal device can obtain the number of receiving members in the multicast group from the second terminal device, which is simple and easy.
  • a terminal device may be a first terminal device or a chip or a system on a chip in the first terminal device.
  • the terminal device can implement the above-mentioned aspects or functions performed by the first terminal device in each possible design.
  • the functions can be implemented by hardware.
  • the terminal device may include: a processor and a transceiver. Device.
  • the processor receives the sideline data including M first resource units from the second terminal device through the transceiver, and determines the available PSFCH feedback resources including P second resource units according to the transmission resources of the received sideline data, according to Available PSFCH feedback resources, the number of receiving members Q in the multicast group, the index value U index of the first terminal device, and the number of orthogonal code sequences that can be reused in X second resource units are determined for sending Frequency domain resources of SFCI and the number of repeated transmissions of SFCI; according to the frequency domain resources used to send SFCI and the number of repeated transmissions of SFCI, SFCI is sent to the second terminal device through the transceiver; X is the second resource unit required for sending SFCI SFCI is used to at least indicate whether the first terminal device correctly receives the side line data.
  • the terminal device may further include a memory, and the memory is used to store necessary computer execution instructions and data of the terminal device.
  • the processor executes the computer-executable instructions stored in the memory, so that the terminal device executes the SFCI sending as described in the thirteenth aspect or any one of the possible designs of the thirteenth aspect. method.
  • a computer-readable storage medium may be a readable non-volatile storage medium, and the computer-readable storage medium stores computer instructions when it runs on a computer. , Enabling the computer to execute the SFCI sending method described in the thirteenth aspect or any one of the possible designs of the foregoing aspects.
  • a computer program product containing instructions which when running on a computer, enables the computer to execute the SFCI sending method described in the thirteenth aspect or any one of the possible designs of the foregoing aspects.
  • a terminal device may be a first terminal device or a chip or a system on a chip in the first terminal device.
  • the terminal device includes one or more processors and one or more memories .
  • the one or more memories are coupled with the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions.
  • the terminal device is caused to execute the SFCI sending method as described in the thirteenth aspect or any possible design of the thirteenth aspect.
  • another SFCI sending method includes: a second terminal device sends sideline data including M first resource units to a first terminal device, and determines that the sideline data includes
  • the available PSFCH feedback resources of the P second resource units are based on the available PSFCH feedback resources, the number of receiving members Q in the multicast group, the index value U index of the first terminal device, and the X second resource units are reproducible
  • the number of orthogonal code sequences used determines the frequency domain resource used to send SFCI and the number of repeated transmissions of SFCI.
  • the SFCI repeatedly sent by the first terminal device is received;
  • X is the transmission The number of second resource units required by the SFCI.
  • the SFCI is used to at least indicate whether the first terminal device correctly receives the side row data.
  • the second terminal device of the multicast side line data in the multicast group determines the available PSFCH feedback resource according to the transmission resource of the side line data, it needs to send the SFCI once through the index of the terminal device.
  • the size of the resource unit, the available orthogonal code sequence and the number of members in the multicast group are determined to determine the frequency domain start position and frequency of the available PSFCH feedback resource for the SFCI sent by the first terminal device to the second terminal device.
  • the frequency domain resource used to send SFCI includes the frequency domain start position of the frequency domain resource used to send SFCI
  • the second The terminal device determines according to the available PSFCH feedback resources, the number of receiving members Q in the multicast group, the index value U index of the first terminal device, and the number of orthogonal code sequences that can be multiplexed in the X second resource units.
  • the frequency domain resources used to transmit SFCI and the number of repeated transmissions of SFCI include: determining the number of orthogonal code sequences that can be multiplexed in the X second resource units and the number of orthogonal codes required to transmit SFCI.
  • the number K, the logical index to determine the frequency domain start position of the frequency domain resource used to send SFCI is: If i ⁇ Re, it is determined that the frequency domain starting position of the frequency domain resource used to send SFCI is the i ⁇ (Rp+1) ⁇ X second resource unit of the available PSFCH feedback
  • the frequency domain resource used to send SFCI can be determined according to the index of the first terminal device, the size of the resource unit required to send SFCI once, the number of receiving members in the multicast group, and the available orthogonal code sequence. The starting position of the frequency domain.
  • the method further includes: the second terminal device according to the index value U index of the first terminal device and X second resources
  • the number of orthogonal code sequences that can be multiplexed in the unit L, the orthogonal code sequence required to send SFCI is determined to be the orthogonal code sequence with index mod(2 ⁇ UE index , L) and the index is mod(2 ⁇ UE index +1, L) orthogonal code sequence.
  • the orthogonal code sequence used to send the SFCI fed back by the first terminal device is determined according to the index of the first terminal device, so that the terminals in the multicast group use different orthogonal code sequences to the second terminal device. Feedback SFCI.
  • the index value U index of the first terminal device is pre-configured; or, the index value U index of the first terminal device is set from the second Terminal device configuration; or, the index value U index of the first terminal device is determined according to the SFCI sent by the receiving member in the multicast group. Based on this possible design, the index of the terminal device can be obtained in a variety of ways, and the implementation methods are flexible and diverse.
  • the present application provides a terminal device.
  • the terminal device may be a second terminal device or a chip or a system on a chip in the second terminal device, and may also be a second terminal device for implementing the nineteenth aspect or Any possible design of the nineteenth aspect is a functional module of the method.
  • the terminal device can implement the functions performed by the second terminal device in the foregoing aspects or various possible designs, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the aforementioned functions.
  • the terminal device may include: a sending unit, a processing unit, and a receiving unit;
  • the sending unit is configured to send side row data including M first resource units to the first terminal device.
  • the processing unit is configured to respond to the available PSFCH feedback resources, the number of receiving members Q in the multicast group, the index value U index of the first terminal device, and the number of orthogonal code sequences that can be multiplexed in the X second resource units.
  • the number is used to determine the frequency domain resources used to send the SFCI and the number of repeated transmissions of the SFCI;
  • X is the number of second resource units required to send the SFCI; the SFCI is used to at least indicate whether the first terminal device correctly receives the sideline data.
  • the receiving unit is configured to receive the SFCI repeatedly sent by the first terminal device in the frequency domain resource used for sending the SFCI.
  • the specific implementation of the terminal device can refer to the behavior function of the second terminal device in the SFCI sending method provided by any possible design of the nineteenth aspect or the nineteenth aspect, the nineteenth aspect or the nineteenth aspect.
  • Any possible design method of the aspect can be implemented correspondingly by the processing unit and the sending unit included in the terminal device, and details are not repeated here. Therefore, the terminal device can achieve the same beneficial effects as the nineteenth aspect or any possible design of the nineteenth aspect.
  • the frequency domain resources used to send SFCI include the frequency domain start position of the frequency domain resources used to send SFCI; the processing unit is specifically configured to: according to X second resources The number of orthogonal code sequences that can be multiplexed in a unit and the number of orthogonal codes required to transmit SFCI are determined to determine the number K of terminal devices that can transmit SFCI in X second resource units; according to the multicast group The number Q of receiving members and the number K of terminal devices that can transmit SFCI in X second resource units determine the number of second resource units required for all receiving members to transmit SFCI to the second terminal device once.
  • the processing unit determines the frequency domain resource for sending SFCI according to the index of the first terminal device, the size of the resource unit required to send SFCI once, the number of receiving members in the multicast group, and the available orthogonal code sequence. The starting position of the frequency domain.
  • the processing unit is further configured to perform data recovery according to the index value U index of the first terminal device and the X second resource units.
  • the number of orthogonal code sequences used is L
  • the orthogonal code sequence used by the received SFCI is determined to be the orthogonal code sequence with the index mod(2 ⁇ UE index , L) and the index is mod(2 ⁇ UE index +1, L) Orthogonal code sequence.
  • the processing unit can determine the orthogonal code sequence used to send the SFCI fed back by the first terminal device according to the index of the first terminal device, so that the terminals in the multicast group use different orthogonal code sequences to send the Two terminal devices feed back SFCI.
  • the index value U index of the first terminal device is pre-configured; or, the index value U index of the first terminal device is set from the second Terminal device configuration; or, the index value U index of the first terminal device is determined according to the SFCI sent by the receiving member in the multicast group. Based on this possible design, the index of the terminal device can be obtained in a variety of ways, and the implementation methods are flexible and diverse.
  • a terminal device in a twenty-first aspect, is provided.
  • the terminal device may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the terminal device can implement the above-mentioned aspects or functions performed by the second terminal device in each possible design.
  • the functions can be implemented by hardware.
  • the terminal device may include: a processor and a transceiver. Device.
  • the processor sends sideline data including M first resource units to the first terminal device through the transceiver, and determines available PSFCH feedback resources according to the transmission resources of the sideline data; the available PSFCH feedback resources include P second resource units And according to the available PSFCH feedback resources, the number of receiving members Q in the multicast group, the index value U index of the first terminal device, and the number of orthogonal code sequences that can be reused in X second resource units, determine The frequency domain resource used to send SFCI and the number of repeated transmissions of SFCI. In the frequency domain resource used to send SFCI, the SFCI repeatedly sent by the first terminal device is received through the transceiver; X is the number of second resource units required to send SFCI.
  • the terminal device may further include a memory, and the memory is used to store necessary computer execution instructions and data of the terminal device.
  • the processor executes the computer-executable instructions stored in the memory, so that the terminal device executes the SFCI sending method as described in the nineteenth aspect or any one of the possible designs of the nineteenth aspect. .
  • a computer-readable storage medium may be a readable non-volatile storage medium, and the computer-readable storage medium stores computer instructions.
  • the computer can execute the SFCI sending method described in the nineteenth aspect or any one of the possible designs of the foregoing aspects.
  • a computer program product containing instructions which when running on a computer, causes the computer to execute the SFCI sending method described in the nineteenth aspect or any one of the possible designs of the foregoing aspects .
  • a terminal device is provided.
  • the terminal device may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the terminal device includes one or more processors and one or more Memory.
  • the one or more memories are coupled with the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions.
  • the terminal device is caused to execute the SFCI sending method according to the nineteenth aspect or any possible design of the nineteenth aspect.
  • the technical effect brought by any one of the twenty-first aspect to the twenty-fourth aspect can be referred to the technical effect brought by any possible design of the nineteenth aspect or the nineteenth aspect. ,No longer.
  • an embodiment of the present application provides an SFCI sending system, which includes the first terminal device according to any one of the second aspect to the sixth aspect and any one of the eighth aspect to the twelfth aspect.
  • the second terminal device according to one aspect; or, the system includes the first terminal device according to any one of the fourteenth aspect to the eighteenth aspect and any one of the twentieth aspect to the twenty-fourth aspect The second terminal device.
  • FIG. 1 is a simplified schematic diagram of a communication system provided by an embodiment of this application.
  • Figure 2 is a schematic diagram of sending SFCI in a unicast communication scenario
  • FIG. 3 is a schematic diagram of the composition of a terminal device provided by an embodiment of the application.
  • FIG. 4 is a flowchart of a method for sending SFCI according to an embodiment of the application
  • FIG. 5 is a schematic diagram of sending SFCI in a multicast communication scenario provided by an embodiment of the application
  • FIG. 6a is a schematic diagram of feedback resources of short format PSFCH provided by an embodiment of the application.
  • FIG. 6b is another schematic diagram of feedback resources of short format PSFCH provided by an embodiment of this application.
  • FIG. 6c is a schematic diagram of feedback resources of the long format PSFCH provided by an embodiment of the application.
  • FIG. 7a is a schematic diagram of obtaining an index of a terminal device according to an embodiment of the application.
  • FIG. 7b is another schematic diagram of obtaining an index of a terminal device according to an embodiment of the application.
  • FIG. 8 is a flowchart of another SFCI sending method provided by an embodiment of this application.
  • FIG. 9 is another schematic diagram of sending SFCI in a multicast communication scenario provided by an embodiment of the application.
  • FIG. 10 is a schematic diagram of the composition of a terminal device 110 provided by an embodiment of this application.
  • FIG. 11 is a schematic diagram of the composition of a terminal device 120 according to an embodiment of the application.
  • FIG. 12 is a schematic diagram of the composition of a communication system provided by an embodiment of this application.
  • the SFCI sending method provided in the embodiments of this application can be used in any communication system that supports sidelink communication.
  • the communication system can be a 3rd generation partnership project (3GPP) communication system, for example, long-term
  • 3GPP 3rd generation partnership project
  • LTE long term evolution
  • 5G fifth generation
  • NR new radio
  • V2X vehicle-to-everything
  • the V2X system and other next-generation communication systems can also be non-3GPP communication systems without limitation.
  • FIG. 1 uses FIG. 1 as an example to describe the method provided in the embodiment of the present application.
  • FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • the communication system may include multiple terminal devices and network devices.
  • the terminal device may be located within the cell coverage of the network equipment, or may be located outside the cell coverage of the network equipment.
  • the terminal device can communicate with the network device through the Uu port, and can also communicate with other terminal devices through the sidelink (SL) (or PC5 port).
  • SL sidelink
  • a terminal device can communicate with other terminal devices one-to-one through a unicast method, or it can perform multicast communications with a plurality of other terminal devices through a multicast method (or called a multicast method). For example, as shown in FIG.
  • the terminal device 1 can perform unicast communication with the terminal device 2 and send sideline data to the terminal device 2 in a unicast manner.
  • the terminal device 1 can form a multicast group with the other three terminal devices (terminal device 3, terminal device 4, and terminal device 5), and the terminal device 1 can send to the terminal device 3, terminal device 4, and terminal device 5 through multicast Side row data.
  • the network device in FIG. 1 can be any device with a wireless transceiver function, which is mainly used to implement wireless physical control functions, resource scheduling and wireless resource management, wireless access control, and mobility management.
  • the network device may be an access network (AN)/radio access network (RAN) device, or a device composed of multiple 5G-AN/5G-RAN nodes, and It can be a base station (nodeB, NB), an evolved base station (evolution nodeB, eNB), a next-generation base station (generation nodeB, gNB), a transmission receiver point (TRP), a transmission point (TP), and a roadside The roadside unit (RSU) and any node among some other access nodes are not restricted.
  • AN access network
  • RAN radio access network
  • a device composed of multiple 5G-AN/5G-RAN nodes and It can be a base station (nodeB, NB), an evolved base station (evolution nodeB, eNB), a next-generation base station (generation no
  • the terminal equipment (terminal equipment) in FIG. 1 may be called a terminal (terminal) or a user equipment (UE) or a mobile station (MS) or a mobile terminal (MT), etc.
  • the terminal device in FIG. 1 may be a mobile phone, a tablet computer, or a computer with wireless transceiver function.
  • the terminal can also be a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, and a smart grid.
  • Both the terminal device and the network device in the embodiments of the present application may be one or more chips, or may be a system on chip (System on Chip, SOC).
  • FIG. 1 is only an exemplary drawing, the number of devices included in FIG. 1 is not limited, and in addition to the devices shown in FIG. 1, the communication architecture may also include other devices.
  • the name of each device in FIG. 1 is not limited. In addition to the name shown in FIG. 1, each device can also be named with other names without limitation.
  • the terminal device can use any of the following modes to obtain transmission resources: 1.
  • Network equipment configuration or scheduling mode (or LTE-V2X mode 3 in LTE-V2X, or NR-V2X or Called NR-V2X mode1).
  • the terminal device's own scheduling mode (or LTE-V2X mode4 in LTE-V2X, or NR-V2X mode2 in NR-V2X), which can be a resource pool that includes a large number of resources allocated by the network device to the terminal device.
  • the terminal device is pre-configured with a resource pool that includes a large number of resources, and multiple terminal devices can select the transmission resources they need from the resource pool in a manner of perceiving scheduling or competition by themselves.
  • the terminal device After the terminal device obtains the transmission resource, it can send side-line data to the receiving end through a physical side-link shared channel (PSSCH) on the obtained transmission resource.
  • PSSCH physical side-link shared channel
  • the receiving end can send sidelink feedback control information (SFCI) to the sending end.
  • SFCI can at least include the receiving end’s feedback to the sending end whether the receiving end is successful or not.
  • the determination information of row data may also include resource channel state information (channel state information, CSI) and/or receiver measured assistance information (receiver UE measured assistance information, RMAI).
  • CSI resource channel state information
  • RMAI receiver measured assistance information
  • the receiving end can send the SFCI to the sending end in the available PSFCH feedback resources.
  • the available PSFCH feedback resources are all used for the receiver to feed back the SFCI. If the available PSFCH feedback resources are greater than the resources required to send SFCI once, the receiver can repeatedly send the SFCI to the sender on the available PSFCH feedback resources to improve SFCI transmission reliability.
  • the available PSFCH feedback resources corresponding to the PSSCH are 2 sub-channels, and each sub-channel includes 4 physical resource blocks (PRB).
  • the sending end can send the SFCI to the receiving end after 8 repetitions on the available PSFCH feedback resources. Or, if one subchannel is required to feed back the SFCI once, the sending end may send the SFCI to the sending end after 2 repetitions on the available PSFCH feedback resources.
  • the receiver can send SFCI once or repeatedly send SFCI on the determined PFSCH feedback resource, and the sender can receive and analyze the SFCI sent by the sender on the available PSFCH feedback resources.
  • the multiple receiving ends share the available PSFCH feedback resources to feed back SFCI to the receiving end.
  • each receiving end needs to further determine the available PSFCH feedback
  • the resource is used to transmit the frequency domain resource of the SFCI itself.
  • an embodiment of the present application provides a method for sending SFCI, in which the receiving end is based on After the transmission resources of the side-line data determine the available PSFCH feedback resources, the receiving end according to its own index in the multicast group, the size of the resource unit X required to send the SFCI once, and the orthogonal codes that can be reused in the X resource units The number of sequences, etc., determine the frequency domain resources occupied by the SFCI in the available PSFCH feedback resources, and send the SFCI to the transmitter on the determined frequency domain resources. In this way, the receiver and multiple other receivers can use codes The SFCI is fed back to the sender in the way of division multiplexing. Specifically, for the implementation manner, refer to the description in the embodiment corresponding to the method shown in FIG. 4.
  • each terminal device shown in FIG. 1 may adopt the composition structure shown in FIG. 3 or include the components shown in FIG. 3.
  • FIG. 3 is a schematic diagram of the composition of a terminal device 300 according to an embodiment of the application.
  • the terminal device 300 may be a terminal device or a chip or a system on a chip in the terminal device.
  • the terminal device 300 includes a processor 301, a transceiver 302, and a communication line 303.
  • the terminal device 300 may further include a memory 304.
  • the processor 301, the memory 304, and the transceiver 302 may be connected through a communication line 303.
  • the processor 301 is a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, Programmable logic device (PLD) or any combination of them.
  • the processor 301 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.
  • the transceiver 302 is used to communicate with other devices or other communication networks.
  • the other communication network may be Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.
  • the transceiver 302 may be a module, a circuit, a transceiver or any device capable of implementing communication.
  • the communication line 303 is used to transmit information between the various components included in the terminal device 300.
  • the memory 304 is used to store instructions. Among them, the instructions can be computer programs.
  • the memory 304 may be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and/or instructions, or it may be a random access memory (RAM) or Other types of dynamic storage devices that store information and/or instructions can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory, CD- ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., are not restricted.
  • EEPROM electrically erasable programmable read-only memory
  • CD- ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.
  • the memory 304 may exist independently of the processor 301, or may be integrated with the processor 301.
  • the memory 304 may be used to store instructions or program codes or some data.
  • the memory 304 may be located in the terminal device 300 or outside the terminal device 300, without limitation.
  • the processor 301 is configured to execute instructions stored in the memory 304 to implement the SFCI sending method provided in the following embodiments of the present application.
  • the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3.
  • the terminal device 300 includes multiple processors.
  • the processor 301 in FIG. 3 it may also include a processor 307.
  • the terminal device 300 further includes an output device 305 and an input device 306.
  • the input device 306 is a device such as a keyboard, a mouse, a microphone or a joystick
  • the output device 305 is a device such as a display screen and a speaker.
  • the terminal device 300 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device with a similar structure in FIG. 3.
  • the composition structure shown in FIG. 3 does not constitute a limitation on the terminal device.
  • the terminal device may include more or less components than those shown in the figure, or combine certain components. , Or different component arrangements.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the terminal device described in the following embodiments may include the components shown in FIG. 3.
  • Fig. 4 is an SFCI sending method provided by an embodiment of the application. As shown in Fig. 4, the method may include:
  • Step 401 The second terminal device sends sideline data to the first terminal device.
  • the second terminal device may be called a transmitting terminal or a transmitting UE, and the first terminal device may be called a receiving terminal or a receiving UE.
  • the first terminal device, the second terminal device, and other terminal devices are located in the same multicast group.
  • the first terminal device can be any receiving member of the multicast group (such as receiving the second terminal device).
  • Any terminal device of the side line data sent by the terminal device) the multicast group may be a fleet, in addition to the first terminal device, the second terminal device, and the third terminal device, the multicast group may also include other One or more terminal devices, and the other terminal devices may be one or more other terminal devices.
  • the second terminal device may be the terminal device 1 in FIG. 1
  • the first terminal device may be the terminal device 3 in FIG. 1
  • the third terminal device may be the terminal device 4 in FIG. 1.
  • the terminal device 3 and the terminal device 4 are located in the same multicast group, and the multicast group also includes the terminal device 5 in FIG. 1 and so on.
  • the second terminal device may adopt a multicast mode to send sideline data to the first terminal device, the third terminal device, and other receiving members in the multicast group.
  • the second terminal device may receive data from the first terminal device, the third terminal device, and other devices in the multicast group through the physical sidelink shared channel (PSSCH) on the transmission resource of the sideline data.
  • PSSCH physical sidelink shared channel
  • the member sends the side row data.
  • the second terminal device bears the sideline data on the PSSCH, and the PSSCH is sent to the first terminal device, the third terminal device, and other receiving members in the multicast group on the transmission resource of the sideline data in a multicast manner.
  • the transmission resource of the side row data may include M first resource units, and M is a positive integer.
  • the first resource unit may refer to a sub-channel (sub-channel) or a physical resource block (physical resource block, PRB), or other resources with a granularity, and is not limited.
  • the transmission resources of the side row data also include time domain resources.
  • the length of the time domain resources is not limited, and may be one or more slots, or one or more mini slots. , It can also be multiple consecutive symbols in one time slot or multiple consecutive symbols in multiple time slots, etc., which is not limited.
  • the side line data occupies 1 subchannel in the frequency domain, and occupies the 0th to 12th symbols in slot1 in the time domain.
  • one subchannel may include multiple PRBs.
  • one subchannel may include 4 PRBs.
  • the transmission resource of the side line data may be configured by the network device or scheduled to the second terminal device, or may be independently selected by the second terminal device, without limitation.
  • the transmission resources of side-line data can be notified to the receiving members of the multicast group, such as the first terminal device and the third terminal device, through the sidelink control information (SCI) carried on the PSCCH, so that the group The receiving members in the broadcast group can receive the side-line data on the transmission resource of the side-line data, which improves the accuracy of the side-line data reception.
  • SCI sidelink control information
  • Step 402 The first terminal device receives sideline data from the second terminal device.
  • the first terminal device may receive the sideline data through the PSSCH on the transmission resource of the sideline data, or it may be described as the first terminal device receiving the sideline data on the transmission resource of the sideline data. PSSCH.
  • Step 403 The first terminal device determines the available PSFCH feedback resource according to the transmission resource of the sideline data.
  • the available PSFCH feedback resources can also be described as PSFHC feedback resources that can be used to send SFCI.
  • the PSFCH feedback resource may be configured periodically.
  • the configuration period of the PSFCH feedback resource may be set to N time slots, where N is an integer greater than or equal to 1, that is, one PSFCH feedback resource is configured every N time slots.
  • the PSFCH feedback resource can be used to transmit sidelink feedback control information (SFCI).
  • the PSFCH feedback resource may include P second resource units.
  • the second resource unit may refer to a sub-channel or a physical resource block or other resources with divided granularity, and is not limited.
  • the granularity of the second resource unit may be less than or equal to the granularity of the first resource unit.
  • the first resource unit is a sub-channel and the second resource unit is a PRB; or the first resource unit and the second resource unit are both sub-channels; or the first resource unit and the second resource unit are both PRBs, etc. To limit.
  • the PSFCH can be divided into a long-format (long-format) PSFCH and a short-format (short-format) PSFCH.
  • the long format PSFCH can occupy all available symbols in a time slot, such as occupying all symbols in a time slot or occupying 13 symbols in a time slot.
  • the short format PSFCH can occupy 1 to 2 symbols in a time slot. For example, the last 1 to 2 available symbols in a time slot can be occupied.
  • the frequency domain position of the PSFCH feedback resource and the frequency domain position of the side row data transmission resource may be the same or different.
  • the time domain position of the available PSFCH feedback resource and the time domain position of the side-line data transmission resource may be the same or different.
  • Step 404 The first terminal device determines the frequency domain for transmitting SFCI according to the available PSFCH feedback resources, the index U index of the first terminal device, and the number of orthogonal code sequences that can be multiplexed in the X second resource units Resources.
  • X is the number of second resource units required by the first terminal device to send the SFCI once to the second terminal device, and X may be an integer greater than or equal to 1.
  • one sub-channel or one PRB may be required to transmit SFCI once, which is not limited.
  • the SFCI is feedback information corresponding to the sideline data received by the first terminal device from the second terminal device.
  • the SFCI can be used to at least indicate whether the first terminal device correctly receives the sideline data sent by the second terminal device.
  • the SFCI can at least include an acknowledgement (acknowledgement, ACK)/negative acknowledgement (NACK), and ACK is used to indicate the sideline If the data is successfully decoded, NACK is used to indicate that the side-line data decoding has failed; or, the SFCI can be used to indicate that the first terminal device correctly receives the side-line data sent by the second terminal device, and the SFCI may include at least ACK; or, SFCI may be used To indicate that the first terminal device did not correctly receive the sideline data sent by the second terminal device, the SFCI may at least include NACK.
  • SFCI may also include other auxiliary information, for example, SFCI may also include CSI, RMAI, etc., which is not limited.
  • the frequency domain resources used for sending SFCI may include the frequency domain start position and frequency domain bandwidth of the frequency domain resources used for sending SFCI in the available PSFCH feedback resources.
  • the first terminal device may send SFCI one or more times on the continuous frequency domain resource unit of the available PSFCH feedback resource, and the frequency domain bandwidth of the frequency domain resource used to send the SFCI is equal to the frequency domain bandwidth required to send the SFCI once.
  • the product of the frequency domain bandwidth and the number of times the first terminal device sends SFCI on the available PSFCH feedback resource, where the frequency domain bandwidth required to send the SFCI once is X second resource units.
  • the first terminal device taking the first terminal device sending an SFCI to the second terminal device as an example, the first terminal device feeds back resources according to the available PSFCH, the index U index of the first terminal device, and X second resource units can be multiplexed
  • the number of orthogonal code sequences for determining the frequency domain resources used to send SFCI in the available PSFCH feedback resources may include:
  • the first terminal device determines the terminal that can transmit SFCI in X second resource units according to the number of orthogonal code sequences that can be multiplexed in X second resource units and the number of orthogonal code sequences required to transmit SFCI The number of devices K;
  • the first terminal device determines the frequency domain start position of the frequency domain resource used to transmit the SFCI according to the index U index of the first terminal device and the number K of terminal devices that can transmit SFCI in X second resource units.
  • the frequency domain start position of the frequency domain resource for sending the SFCI is the first available PSFCH feedback resource
  • the first second resource unit after the second resource units is used as the frequency domain start position of the frequency domain resource used to send the SFCI, and the frequency domain bandwidth of the frequency domain resource used to send the SFCI is X second resource units.
  • the P second resource units included in the available PSFCH feedback resources can be sorted from the start position of the PSFCH feedback resource in the frequency domain as: the first second resource unit, the second The second resource unit, and so on, until the Pth second resource unit.
  • the number of orthogonal code sequences that can be multiplexed in the X second resource units can also be described as the maximum number of orthogonal code sequences that can be transmitted in the X second resource units.
  • the length of an orthogonal code sequence is X second resource units. Specifically, the design length of the orthogonal code sequence of X second resource units is not limited.
  • the X second resource units described in the embodiment of the present application are resource units for sending SFCI corresponding to the sidestream data multicasted by the second terminal device to the first terminal device.
  • the number of orthogonal code sequences that can be multiplexed in the X second resource units may specifically refer to the orthogonal code sequences that can be reused in the X second resource units for feeding back the SFCI corresponding to the side row data described in step 401. The number of code sequences.
  • the configuration period of the PSFCH feedback resource is N time slots
  • the SFCI corresponding to the side row data on these N time slots needs to be shared
  • the same X second resource units, namely X second resource units in addition to sending the SFCI corresponding to the side row data described in step 401, also need to send the side row data corresponding to other N-1 time slots SFCI
  • n is the number of orthogonal code sequences that can be multiplexed in the X second resource units configured in advance.
  • the number n of orthogonal code sequences that can be multiplexed in the X second resource units can be pre-configured according to the PSFCH format.
  • 12 orthogonal code sequences can be multiplexed on one PRB or 12 resource elements (RE); 54 orthogonal code sequences can be multiplexed on 10 PRBs or 120 REs; long In PSFCH format, 72 orthogonal code sequences can be multiplexed on 1 PRB or 12 REs.
  • the PSFCH feedback resource configuration period is 2 time slots, and side row data is sent on time slot 1 and time slot 2, each time The side-line data on the slot is sent to different multicast groups, and the available PSFCH feedback resource determined according to the transmission resource of the side-line data on time slot 1 and the available PSFCH feedback resource determined according to the transmission resource of the side-line data on time slot 2 PSFCH feedback resources are the same.
  • the SFCI corresponding to the side row data on the feedback slot 1 needs a subchannel
  • the SFCI corresponding to the side row data on the feedback slot 2 needs a subchannel
  • the SFCI corresponding to the side row data on the slot 1 can use 12
  • the SFCI corresponding to the side row data on time slot 2 can use the other 6 orthogonal code sequences among the 12 orthogonal code sequences.
  • the number of orthogonal code sequences required to send SFCI can be determined according to the information carried by SFCI, and the number of orthogonal code sequences required to send SFCI can be one or two or three, which is not limited. Taking SFCI as ACK or NACK as an example, the number of orthogonal code sequences required to send SFCI is two, where one orthogonal code sequence is used to indicate ACK, and the other orthogonal code sequence is used to indicate NACK.
  • the number of orthogonal code sequences required to send SFCI is two, and the orthogonal code sequences required to send SFCI are respectively the orthogonal code sequences of L orthogonal code sequences whose index is mod (2 ⁇ UE index , L) Code sequence and two orthogonal code sequences with index mod (2 ⁇ UE index +1, L).
  • the number K of terminal devices that can transmit SFCI in X second resource units can also be described as the maximum number of terminal devices that can be multiplexed in X second resource units K, in other words, it can support up to K
  • the SFCIs of two terminal devices are multiplexed on X second resource units. Taking the number of orthogonal code sequences that can be multiplexed in X second resource units as L, and the number of orthogonal code sequences required to transmit SFCI as Num, for example, the SFCI can be transmitted in X second resource units.
  • the number of terminal devices is
  • the index U index of the first terminal device may be used to uniquely identify the first terminal device in the multicast group.
  • the index U index of the first terminal device can also be described as the number of the first terminal device.
  • the method for determining the index U index of the first terminal device can refer to the second scenario of the method shown in FIG. 4.
  • a multicast group includes terminal device 1, terminal device 3, terminal device 4, and terminal device 5.
  • the index of terminal device 1 can be 0, the index of terminal device 3 can be 1, and so on.
  • the index of the terminal device 4 is 2 and the index of the terminal device 5 is 3.
  • the multicast group includes terminal device 1, terminal device 3, terminal device 4, terminal device 5, terminal device 6, and terminal device 7.
  • the index of terminal device 1 is 0 and the index of terminal device 3 is 1, so
  • the index of the terminal device 4 is 2
  • the index of the terminal device 5 is 3
  • the index of the terminal device 6 is 4, and the index of the terminal device is 5.
  • Step 405 The first terminal device sends the SFCI to the second terminal device according to the frequency domain resource used to send the SFCI.
  • the first terminal device may feed back resources in the The second resource units are the first X second resource units, and the SFCI is sent to the second terminal device through one PSFCH.
  • the first terminal device may On the first X second resource units with the second resource units, sending an orthogonal code sequence with an index mod (2 ⁇ UE index, L) to the second terminal device through a PSFCH;
  • the first terminal device may
  • the first X second resource units are the first X second resource units, and an orthogonal code sequence with an index mod (2 ⁇ UE index +1, L) is sent to the second terminal device through a PSFCH.
  • orthogonal code sequences with an index of mod (2 ⁇ UE index , L) when sending ACK and using an index of mod (2 ⁇ UE index +1, L) when sending NACK.
  • Orthogonal code sequence. Orthogonal code sequence with index mod (2 ⁇ UE index +1, L) can be used when sending ACK. Orthogonal code sequence with index mod (2 ⁇ UE index , L) can be used when sending NACK. .
  • one sub-channel is required to send SFCI once as an example.
  • the SFCI corresponding to the side row data sent in the first time slot can use the first 6 orthogonal code sequences, and the side of the second time slot is sent.
  • the SFCI corresponding to the row data can use the last six orthogonal code sequences, and the side row data sent for each time slot can support up to 3 UEs' SFCI to be multiplexed on the PSFCH frequency domain resource corresponding to a subchannel.
  • the sending UE can send data to the receiving UE.
  • the indexes of the 6 receiving UEs are 0, 1, 2, ..., 5. 2 sub-channels are needed to support all 6 receiving UEs for ACK/NACK feedback.
  • the frequency domain starting position of the frequency domain resource of the SFCI of the receiving UE with 0, 1, 2 is subchannel 1, and the frequency domain bandwidth of the frequency domain resource of the SFCI of the receiving UE with the index of 0, 1, and 2 is A subchannel; used to transmit the frequency domain start position of the frequency domain resource of the receiving UE's SFCI with index 3, 4, and 5 and the offset value between the frequency domain start position of the PSFCH feedback resource is 1, used for transmission
  • the frequency domain start position of the frequency domain resource of the SFCI of the receiving UE with indexes 3, 4, and 5 is subchannel 2, and the receiving UE with indexes 3, 4, and 5 occupies a subchannel
  • the receiving UE with index 0 can use orthogonal code sequences with indexes 0 and 1 to represent ACK and NACK
  • a receiving UE with index 1 can use orthogonal code sequences with indexes 2 and 3 to represent ACK and NACK
  • a receiving UE with index 2 can use orthogonal code sequences with indexes 4 and 5 to represent ACK and NACK.
  • the receiving UE with index 3 can use the orthogonal code sequences with indexes 0 and 1 to indicate ACK and NACK
  • the receiving UE with index 4 can use the orthogonal code sequences with indexes 2 and 3 to indicate ACK and NACK
  • the one with index 5 The receiving UE may use orthogonal code sequences with indices 4 and 5 to indicate ACK and NACK.
  • this application does not limit the starting index of the terminal device.
  • the embodiment of this application only describes the starting index of the terminal device as 0.
  • the starting index of the terminal device can also be 1 or other values.
  • the starting index of the orthogonal code sequence can also be 1 or other values, which is not limited.
  • the above scheme can still be used to determine the frequency domain start position of the frequency domain resource of the SFCI sent by the first terminal device to the second terminal device, and the orthogonal code used for sending the SFCI sequence.
  • Step 406 The second terminal device receives the SFCI from the first terminal device on the frequency domain resource used to send the SFCI.
  • the second terminal device may refer to step 403 to determine the available PSFCH feedback resource, and then determine the frequency domain start position and frequency domain bandwidth of the frequency domain resource used to send the SFCI on the available PSFCH feedback resource according to the process described in step 404 X, and the orthogonal code sequence used by the first terminal device to send the SFCI; on X second resource units starting from the frequency domain start position of the frequency domain resource used to send the SFCI, receive data from The orthogonal code sequence of the first terminal device, the received orthogonal code sequence is used to indicate the SFCI that the first terminal device feeds back to the second terminal device.
  • steps 402 to 406 shown in FIG. 4 take the first terminal device in the multicast group feeding back SFCI to the second terminal device as an example, and introduce the SFCI sending method provided in the embodiment of the present application. It is understandable that other receiving members in the multicast group, such as the third terminal device, the fourth terminal device, etc., can also send the SFCI to the second terminal device with reference to the steps shown in FIG. 4. Correspondingly, the second terminal device The method described in step 406 can also be used to receive the SFCI fed back by other members in the multicast group, which will not be repeated.
  • the method shown in FIG. 4 uses a code division multiplexing (CDM) method for multiple terminal devices to multiplex multiple orthogonal code sequences for indicating SFCI and feed them back to the sending terminal as an example.
  • CDM code division multiplexing
  • the SFCI sending method provided by the embodiment of the present application is described.
  • multiple receiving terminals in a multicast group can also use other multiplexing methods to feed back SFCI to the sending terminal, such as: frequency division multiplexing or time division multiplexing or Time-frequency multiplexing or frequency division + code division multiplexing or time division + code division multiplexing or time-frequency multiplexing + code division multiplexing is used to feed back the SFCI to the sending terminal, which is not limited.
  • the group The receiving member can also feed back other auxiliary information of its own, such as CSI and/or RMAI, to the transmitting terminal in a code division multiplexing manner on the remaining resources, thereby improving the utilization of the PSFCH feedback resource.
  • CSI and/or RMAI auxiliary information of its own
  • the CSI of the receiving UE with indexes 0, 1, and 2 can be sent on subchannel 3 of the PSFCH feedback resource
  • the CSI with indexes 3, 4, 5 can be sent on the subchannel 4 of the PSFCH feedback resource.
  • the receiving terminal uses the index of the terminal device, the size of the resource unit required to send the SFCI once, and
  • the orthogonal code sequence and other information can be used to determine the frequency domain starting position and frequency domain bandwidth of the available PSFCH feedback resource for the SFCI sent by the receiving terminal to the sending terminal, as well as the orthogonal code sequence used to send the SFCI, so as to realize multiple multicast communications.
  • the SFCI feedback of each receiving terminal to the PSSCH transmission especially the ACK/NACK feedback, solves the problem that the frequency domain resource cannot be determined for the SFCI fed back by each receiving terminal in the multicast communication scenario.
  • the design format of the PSFCH feedback resource can be as follows:
  • PSFCH is a short format PSFCH.
  • the frequency domain start position of the PSFCH feedback resource used to send SFCI is the same as the frequency domain start position of the sideline data transmission resource, and the frequency domain of the PSFCH feedback resource used to send SFCI The bandwidth is smaller than the frequency domain bandwidth of the transmission resource of the side row data.
  • the frequency domain start position of the PSFCH feedback resource is determined according to the frequency domain start position of the PSSCH carrying sideline data and the slot position of the PSSCH carrying sideline data.
  • the SFCI corresponding to the PSSCH sent in time slot 1 and time slot 2 is fed back on the PSFCH feedback resource in time slot 3.
  • the frequency domain start position of the PSSCH transmitted in time slot 1 is subchannel 2
  • the frequency domain start position of the corresponding PSFCH feedback resource is subchannel 2. Since it is transmitted in time slot 1,
  • the SFCI corresponding to the PSSCH can use the first 2 PRBs in the PSFCH feedback resource.
  • the frequency domain start position of the PSSCH sent in time slot 2 is subchannel 2, and the frequency domain start position of the corresponding PSFCH feedback resource is also subchannel 2.
  • the SFCI corresponding to the PSSCH can be Use the last 2 PRBs in the frequency domain resources of the PSFCH. 6a arranges the resource units in the PSFCH feedback resource used by the SFCI in the order of time slots, or arranges the resource units in the PSFCH feedback resource used by the SFCI in frequency priority, which is not limited in the embodiment of the present application.
  • PSFCH is a short format PSFCH.
  • the frequency domain start position of the PSFCH feedback resource is the same as the frequency domain start position of the sideline data transmission resource.
  • the frequency domain bandwidth of the PSFCH feedback resource is equal to the frequency domain of the sideline data transmission resource. Domain bandwidth.
  • the PSSCH carrying sideline data occupies the frequency domain bandwidth of 2 subchannels, and the frequency domain bandwidth of the available PSFCH feedback resource is also 2 subchannels. If the transmission of SFCI corresponding to the PSSCH of N timeslots is supported on the same PSFCH feedback resource, the SFCI corresponding to the PSSCH of N timeslots can be transmitted in a code division multiplexing manner.
  • the PSSCH on time slot 1 corresponds to a set of orthogonal code sequences, which can be used to indicate the SFCI corresponding to the PSSCH on time slot 1; PSSCH on time slot 2 It may correspond to another set of orthogonal code sequences, and the set of orthogonal code sequences may be used to indicate the SFCI corresponding to the PSSCH on time slot 2. Two sets of orthogonal code sequences can be multiplexed on the PSFCH feedback resource of time slot 3 for transmission.
  • PSFCH is a long format PSFCH.
  • the frequency domain start position of the PSFCH feedback resource is different from the frequency domain start position of the sideline data transmission resource.
  • the frequency domain start position of the PSFCH feedback resource is different from the sideline data transmission resource.
  • the frequency domain start position of the PSFCH is twice the number of PSSCH frequency domain start positions.
  • the frequency domain bandwidth of the PSFCH is twice the number of subchannels occupied by the PSSCH.
  • the frequency domain starting position of the PSSCH of a UE is subchannel 1, and 2 subchannels are occupied, then the frequency domain of the PSFCH corresponding to the PSSCH starts Position PRB 2.
  • the frequency domain bandwidth of PSFCH is 4 PRBs.
  • a side row resource pool is configured with 20 MHz, the sub-carrier spacing is 15K, and a total of 100 available PRBs are configured. If a subchannel is configured to include 10 PRBs, the PSFCH is included in the 20 MHz side row resource pool.
  • the side row resource pool includes 8 sub-channels for PSSCH transmission, and 16 PRBs for PSFCH transmission, corresponding to PSSCH.
  • the starting PRB of the side row resource pool is 1, the length is 100, and the starting PRB used for PSSCH transmission is 1, the length is 80, and the subchannel size is 10, then PRB1 ⁇ 10 correspond to Channel 1, PRB11-20 corresponds to subchannel 2, and so on to subchannel 8.
  • the starting PRB used for PSFCH transmission is 85 and the length is 16, corresponding to subchannels 1 to 8.
  • the PSFCH offset corresponding to the PSSCH of subchannel 1 is 0, that is, the frequency domain starting position of the PSFCH corresponding to the PSSCH of subchannel 1 is the PRB with index 85;
  • the PSFCH offset corresponding to the PSSCH of subchannel 2 is 2, that is, the frequency domain starting position of the PSFCH corresponding to the PSSCH of subchannel 1 is the PRB with index 87, and so on, the PSSCH of subchannel 8 corresponds to the offset of PSFCH 14 , That is, the frequency domain starting position of the PSFCH corresponding to the PSSCH of subchannel 8 is the PRB with index 99.
  • the index U index of the first terminal device can be determined in any of the following three ways:
  • Manner 1 The index U index of the first terminal device is pre-configured.
  • each terminal device in the multicast group may be configured with its corresponding index, and optionally, the configured index may be stored in the terminal device in advance.
  • Manner 2 The index U index of the first terminal device is notified to the first terminal device by the second terminal device.
  • the second terminal device may also notify the first terminal of the number of receiving members in the multicast group, and notify the first terminal device of other information, which is not limited.
  • FIG. 7a is a schematic diagram of obtaining an index of a terminal device according to an embodiment of the application. As shown in Fig. 7a, the process may include:
  • the first terminal device sends a request to join the multicast group to the second terminal device to request to join the multicast group where the second terminal device is located; the second terminal device receives the request to join the multicast group sent by the first terminal device, and After it is determined that the first terminal device joins the multicast group, an index is configured for the first terminal device, and the index of the first terminal device and the number of receiving members that successfully join the multicast group are sent to the first terminal device.
  • the second terminal device configures the index for the third terminal device after determining that the third terminal device joins the multicast group, and updates the join The number of receiving members of the multicast group, such as: adding 1 to the number of receiving members joining the multicast group, and sending the index of the third terminal device and the updated reception of the multicast group to the third terminal device The number of members. Further optionally, when a new member joins, the second terminal device further sends the updated number of receiving members of the multicast group to the first terminal device.
  • At least one sending terminal in the multicast group such as the second terminal device described in the embodiment of this application, and other members of the multicast group except the sending terminal may be called Receiving UE or receiving member.
  • the second terminal device may send the member index and the member index of the receiving member in the multicast group to each member joining the multicast group through the radio resource control (PC5-radio resource control, RRC) signaling of the PC5 interface.
  • RRC radio resource control
  • the second terminal device may be called a group head.
  • the group head may assign index 0 to itself, assign index 1 to the first terminal device to join the multicast group, and to the second terminal device to join the multicast group.
  • the terminal device is assigned index 2, and so on. For example, if the number of members in a multicast group including the group header is 5, the indexes of these 5 members are 0, 1, 2, 3, and 4 respectively.
  • the second terminal device may re-allocate the index of each receiving member and update the number of receiving members in the multicast group.
  • the first terminal device sends a request to leave the multicast group to the second terminal device to request to leave the multicast group; the second terminal device receives the request to leave the multicast group sent by the first terminal device. Request to release the index of the first terminal device after it is determined that the first terminal device leaves the multicast group.
  • the second terminal device re-allocates the indexes for the receiving members existing in the multicast group, so that the indexes of the receiving members in the multicast group are consecutive numbers, and at the same time, the number of receiving members is updated, such as: The number of members is reduced by 1, and the updated index of the third terminal device and the number of receiving members are sent to the third terminal device.
  • Manner 3 The index U index of the first terminal device is determined according to the SFCI sent by the receiving member in the multicast group.
  • Fig. 7b is a schematic diagram of obtaining an index of a terminal device according to an embodiment of the application. As shown in Fig. 7b, the process may include:
  • the first terminal device receives and sends a request to join the multicast group to the second terminal device to request to join the multicast group where the second terminal device is located; the second terminal device receives the request to join the multicast group sent by the first terminal device, After determining that the first terminal device joins the multicast group, configure an index for the first terminal device. For example, when the first terminal device is the first receiving member to join the multicast group, configure the index of the first terminal device as 1.
  • the second terminal device multicasts side-line data to the first terminal device. After receiving the side-line data, the first terminal device refers to step 403 to determine the available PSFCH feedback resources, and detects and decodes other PSFCH feedback resources.
  • the first terminal device determines that its own index is 1. Subsequently, the first terminal device can use the index 1 to perform step 404 to determine the frequency for sending the SFCI. Domain resources, and send the SFCI to the second terminal device on the determined frequency domain resources for sending the SFCI.
  • the newly joined UE receives and decodes the sidestream data multicast by the second terminal device, and determines the available PSFCH feedback resources with reference to step 403 , Detect and decode the SFCI fed back by other receiving members on the PSFCH feedback resource, obtain the indexes of other sending members in the existing multicast group, select the first available index among the unused indexes, and perform the next multicast communication Use the selected index to determine the frequency domain resource and code domain resource used to send SFCI (such as the orthogonal code sequence used to send SFCI), and send the frequency domain resource and code domain resource to the first Two terminal devices feed back SFCI.
  • the frequency domain resource and code domain resource used to send SFCI such as the orthogonal code sequence used to send SFCI
  • the second terminal device is used as the group head.
  • the group head is based on the existing group member’s
  • the index determines that the index of the newly added third terminal device is 2.
  • the second terminal device transmits the sideline data to the first terminal device and the third terminal device in the multicast group, and the first terminal device receives the sideline data and feeds back the SFCI to the second terminal device with reference to the method shown in FIG. 4.
  • the third terminal device receives the sidestream data multicast from the second terminal device and determines the available PSFCH feedback resource with reference to step 403, detects and decodes the SFCI fed back by other receiving members on the PSFCH feedback resource, and obtains the existing multicast group For example, if it is found that index 1 is occupied by the first terminal device, the third terminal device selects the first available index 2 among the unused indexes as its own index. In the next multicast communication between the third terminal device and the second terminal device, the third terminal device may refer to step 404, and determine the frequency domain resource and code domain resource used to send the SFCI according to the index 2 and other information. The frequency domain resource and the code domain resource used to send the SFCI feed back the SFCI to the second terminal device.
  • the group head determines the index of the newly joined fourth terminal device according to the indexes of the existing two group members Is 3.
  • the second terminal device sends the sideline data to the first terminal device, the third terminal device, and the fourth terminal device in the multicast group.
  • the first terminal device and the third terminal device receive the sideline data, and refer to the method shown in FIG. 4 SFCI is fed back to the second terminal device.
  • the fourth terminal device receives the sidestream data multicast from the second terminal device, determines the available PSFCH feedback resource with reference to step 403, detects and decodes the SFCI fed back by other receiving members on the PSFCH feedback resource, and obtains the existing multicast Indexes of other sending members in the group, for example, if it is found that index 1 and index 2 are occupied by the first terminal device, the fourth terminal device selects the first available index 3 among the unused indexes as its own index.
  • the fourth terminal device may refer to step 404, and determine the frequency domain resource and code domain resource used to send the SFCI according to the index 3 and other information. The frequency domain resource and the code domain resource used to send the SFCI feed back the SFCI to the second terminal device.
  • the group head since the fourth terminal device has not yet obtained an index to determine the feedback resource, the group head does not have After receiving the feedback information from the fourth terminal device, it is considered that the fourth terminal device has failed to receive, and the group header adopts hybrid automatic repeat request (HARQ) technology to retransmit the side row data to the fourth terminal device. Subsequently, the newly joined member (such as the fourth terminal device) has obtained the index, and the index can be used to determine the frequency domain resource for sending the SFCI for ACK/NACK feedback.
  • HARQ hybrid automatic repeat request
  • the first terminal device can obtain its own index by sensing and decoding the SFCI fed back by other members in the multicast group, without having to obtain its own index through interaction with the second terminal device. In this way, the interference between devices can be reduced. Signaling interaction improves resource utilization.
  • the method shown in Fig. 4 uses code division multiplexing to send the SFCI fed back by multiple terminal devices to the sending terminal as an example.
  • the code division multiplexing can also be used.
  • the SFCI fed back by multiple terminal devices is repeatedly sent to the sending terminal to improve the resource rate of the PSFCH feedback resource and the transmission reliability of the SFCI.
  • this feasible solution can be referred to as shown in FIG. 8.
  • FIG. 8 is another SFCI sending method provided by an embodiment of the application. As shown in FIG. 8, the method may include:
  • Step 801 The second terminal device sends sideline data to the first terminal device.
  • step 801 can refer to the description of step 401, which will not be repeated.
  • Step 802 The first terminal device receives sideline data from the second terminal device.
  • step 802 can refer to the description of step 402, and will not be repeated.
  • Step 803 The first terminal device determines the available PSFCH feedback resource according to the transmission resource of the sideline data.
  • step 803 can be referred to as described in step 403, which will not be repeated.
  • Step 804 The first terminal device according to the available PSFCH feedback resources, the number of receiving members Q in the multicast group, the index U index of the first terminal device, the number of orthogonal code sequences that can be multiplexed in the X second resource units The number is used to determine the frequency domain resource used to send the SFCI and the number of repeated sending of the SFCI.
  • the description in step 404 For the related description of the index U index of the first terminal device and the related description of the number of orthogonal code sequences that can be reused in the X second resource units, refer to the description in step 404.
  • the method for obtaining the index U index of the first terminal device can be referred to in the above mode 1 to mode 3, and the method for obtaining the number Q of receiving members in the multicast group can be referred to as described in the above mode 3, which will not be repeated.
  • the frequency domain resource used to send the SFCI may include the frequency domain start position and the frequency domain bandwidth of the frequency domain resource used to send the SFCI.
  • the frequency domain bandwidth of the frequency domain resource used to transmit the SFCI is equal to the product of the number of repeated transmissions of the SFCI and the number X of second resource units required to transmit the SFCI once.
  • the first terminal device feeds back resources according to the available PSFCH, the number Q of receiving members in the multicast group, the index U index of the first terminal device, and the orthogonal code sequences that can be multiplexed in the X second resource units
  • the number of SFCIs, the frequency domain resources used to send SFCI and the number of SFCI repeated transmissions may include:
  • the first terminal device determines the terminal device that can transmit SFCI in X second resource units according to the number of orthogonal code sequences that can be multiplexed in X second resource units and the number of orthogonal codes required to transmit SFCI The number of K;
  • the first terminal device determines the first time required for all receiving members to send SFCI to the second terminal device once.
  • Number of resource units Indicates rounding down;
  • the first terminal device determines the frequency domain start position of the frequency domain resource for transmitting the SFCI according to the index value U index of the first terminal device and the number K of terminal devices that can transmit SFCI in X second resource units
  • the logical index is:
  • the frequency domain start position of the frequency domain resource for sending SFCI is the i ⁇ (Rp+1) ⁇ X second resource unit of the available PSFCH feedback resource, that is, the frequency domain start position of the frequency domain resource for sending SFCI
  • the position is the first second resource unit after the frequency domain start position of the available PSFCH feedback resource offset by i ⁇ (Rp+1) ⁇ X second resource units, and the number of repeated transmissions of SFCI is Rp+1;
  • the frequency domain starting position of the frequency domain resource used to send SFCI is the (Re ⁇ (Rp+1)+(i-Re) ⁇ Rp)th of the available PSFCH feedback resources ⁇ X second resource units, that is, the frequency domain start position of the frequency domain resource used to send SFCI is the frequency domain start position offset of the available PSFCH feedback resource (Re ⁇ (Rp+1)+(i-Re ) ⁇ Rp) ⁇ X after the first second resource unit, the number of repeated transmissions of the SFCI is Rp.
  • Step 805 The first terminal device repeatedly transmits the SFCI to the second terminal device according to the frequency domain resource used to transmit the SFCI and the number of repeated transmissions of the SFCI.
  • the first terminal device may be on X ⁇ C second resource units starting from the frequency domain start position of the frequency domain resource used to transmit the SFCI, C SFCIs are repeatedly sent to the second terminal device through one PSFCH, and each SCFI occupies X second resource units.
  • the first terminal device when the first terminal device successfully decodes and receives the sideline data, the first terminal device may start at X starting from the frequency domain start position of the frequency domain resource used to send the SFCI.
  • ⁇ C second resource units repeatedly sending C orthogonal code sequences with an index of mod(2 ⁇ UE index, L) to the second terminal device through one PSFCH;
  • the first terminal device When the first terminal device fails to decode the side line data, the first terminal device can pass one X ⁇ C second resource unit starting from the frequency domain start position of the frequency domain resource used to send the SFCI.
  • the PSFCH transmits to the second terminal device repeatedly C orthogonal code sequences with an index mod (2 ⁇ UE index +1, L).
  • orthogonal code sequences with an index of mod (2 ⁇ UE index , L) when sending ACK and using an index of mod (2 ⁇ UE index +1, L) when sending NACK.
  • Orthogonal code sequence. Orthogonal code sequence with index mod (2 ⁇ UE index +1, L) can be used when sending ACK. Orthogonal code sequence with index mod (2 ⁇ UE index , L) can be used when sending NACK. .
  • SFCI as ACK/NACK feedback
  • one subchannel is required to send SFCI once.
  • the SFCI corresponding to the side row data sent in the first time slot can use the first 6 orthogonal code sequences, and the side of the second time slot is sent.
  • the SFCI corresponding to the row data can use the last six orthogonal code sequences, and the side row data sent for each time slot can support up to 3 UEs' SFCI to be multiplexed on the PSFCH frequency domain resource corresponding to a subchannel.
  • the sending UE can send data to the receiving UE.
  • the frequency domain starting position of the frequency domain resource of the UE's SFCI is subchannel 1.
  • Rp+1 it can be determined that the three receiving UEs with indexes of 0, 1, and 2 repeatedly send SFCI for 3 times, that is, these three receivers
  • the UE can occupy three subchannels from subchannel 1 to subchannel 3, and repeatedly send the SFCI 3 times.
  • the logical index i of the frequency domain starting position of the frequency domain resource of the receiving UE's SFCI with indexes 3, 4, and 5 is 1, which is equal to Re
  • the formula (Re ⁇ (Rp+1)+( i-Re) ⁇ Rp) ⁇ X can determine the offset value between the frequency domain start position of the frequency domain resources used to send the SFCI of the three receiving UEs and the frequency domain start position of the PSFCH feedback resource is 3.
  • the frequency domain start position of the frequency domain resource of the SFCI of the receiving UE with the transmission index of 3, 4, 5 is subchannel 4, and the number of times the three receiving UEs with the index 3, 4, and 5 repeatedly send the SFCI is 2, that is
  • the three receiving UEs can occupy two sub-channels of sub-channel 4 to sub-channel 5, and repeatedly send SFCI 2 times.
  • the receiving UE with index 0 can use orthogonal code sequences with indexes 0 and 1 to represent ACK and NACK
  • a receiving UE with index 1 can use orthogonal code sequences with indexes 2 and 3 to represent ACK and NACK
  • a receiving UE with index 2 can use orthogonal code sequences with indexes 4 and 5 to represent ACK and NACK.
  • the receiving UE with index 3 can use the orthogonal code sequences with indexes 0 and 1 to indicate ACK and NACK
  • the receiving UE with index 4 can use the orthogonal code sequences with indexes 2 and 3 to indicate ACK and NACK
  • the one with index 5 The receiving UE may use orthogonal code sequences with indices 4 and 5 to indicate ACK and NACK.
  • this application does not limit the starting index of the terminal device.
  • the embodiment of this application only describes the starting index of the terminal device as 0.
  • the starting index of the terminal device can also be 1 or other values.
  • the starting index of the orthogonal code sequence can also be 1 or other values, which is not limited.
  • the above scheme can still be used to determine the frequency domain start position of the frequency domain resource of the SFCI sent by the first terminal device to the second terminal device, and the orthogonal code used for sending the SFCI sequence.
  • Step 806 The second terminal device receives the SFCI repeatedly sent by the first terminal device on the frequency domain resource used to send the SFCI.
  • the second terminal device may refer to step 803 to determine the available PSFCH feedback resource, and then according to the process of step 804, determine the frequency domain start position of the frequency domain resource used to send the SFCI and the repetition of SFCI on the available PSFCH feedback resource The number of transmissions and the orthogonal code sequence used by the first terminal device to transmit the SFCI;
  • the second terminal device may receive X ⁇ C second resource units starting from the frequency domain start position of the frequency domain resource used to transmit SFCI through one PSFCH
  • the C orthogonal code sequences repeatedly transmitted by the first terminal device are analyzed, and the C orthogonal codes are analyzed to obtain the SFCI fed back by the first terminal device to the second terminal device.
  • steps 802 to 806 shown in FIG. 8 take the first terminal device in the multicast group feeding back SFCI to the second terminal device as an example to introduce the SFCI sending method provided in the embodiment of the present application. It is understandable that other receiving members in the multicast group, such as the third terminal device, the fourth terminal device, etc., can also send SFCI to the second terminal device with reference to the steps shown in FIG. 8. Correspondingly, the second terminal device The method described in step 806 can also be used to receive the SFCI fed back by other members in the multicast group, which will not be repeated.
  • the method shown in FIG. 8 takes a code division multiplexing (CDM) method used by multiple terminal devices to multiplex multiple orthogonal code sequences for indicating SFCI and feed them back to the sending terminal as an example.
  • CDM code division multiplexing
  • the SFCI sending method provided by the embodiment of the present application is described.
  • multiple receiving terminals in a multicast group can also use other multiplexing methods to feed back SFCI to the sending terminal, such as: frequency division multiplexing or time division multiplexing or Time-frequency multiplexing or frequency division + code division multiplexing or time division + code division multiplexing or time-frequency multiplexing + code division multiplexing is used to feed back the SFCI to the sending terminal, which is not limited.
  • the group The receiving member can also feed back other auxiliary information of its own, such as CSI and/or RMAI, to the sending terminal in a code division multiplexing manner on the remaining resources, thereby improving the utilization of the PSFCH feedback resource.
  • auxiliary information of its own such as CSI and/or RMAI
  • the receiving terminal uses the index of the terminal device to send the size of the resource unit required for one SFCI.
  • the orthogonal code sequence and the number of receiving members in the multicast group can be used to determine the frequency domain starting position of the available PSFCH feedback resource for the SFCI sent by the receiving terminal to the sending terminal, the number of repeated SFCI transmissions, and the correctness used to send the SFCI.
  • the cross-code sequence realizes the SFCI feedback of multiple receiving terminals for PSSCH transmission in multicast communication, especially ACK/NACK feedback, and solves the problem that the frequency domain resource cannot be determined for the SFCI fed back by each receiving terminal in the multicast communication scenario.
  • occupying continuous frequency domain resources when SFCI is repeatedly transmitted can further reduce power impact and improve SFCI transmission reliability.
  • each network element such as an SDN controller and a repeater, includes hardware structures and/or software modules corresponding to each function.
  • each network element such as an SDN controller and a repeater
  • 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-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application can divide the SDN controller and the repeater into functional modules according to the above method examples.
  • each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 10 shows a structural diagram of a terminal device 100.
  • the terminal device 100 may be a first terminal device or a chip or a system on a chip in the first terminal device.
  • the terminal device 100 may be used to perform the functions of the first terminal device involved in the above-mentioned embodiments.
  • the terminal device 100 shown in FIG. 10 includes a receiving unit 1001, a processing unit 1002, and a sending unit 1003.
  • the receiving unit 1001 is configured to receive side-line data from the second terminal device; the transmission resource of the side-line data includes M first resource units, and M is a positive integer; for example, the receiving unit 1001 can support the terminal
  • the device 100 executes step 402.
  • the processing unit 1002 is configured to determine the available PSFCH feedback resource according to the transmission resource of the side row data; the available PSFCH feedback resource includes P second resource units; and according to the available PSFCH feedback resource, the index U index of the first terminal device , The number of orthogonal code sequences that can be multiplexed in X second resource units to determine the frequency domain resources used to send SFCI; X is the number of second resource units required to send SFCI, and X is greater than or equal to 1. Integer; SFCI is used to at least indicate whether the first terminal device correctly receives sideline data.
  • the processing unit 1002 may support the terminal device 100 to perform step 403 and step 404.
  • the sending unit 1003 is configured to send the SFCI to the second terminal device according to the frequency domain resource used for sending the SFCI.
  • the sending unit 1003 may support the terminal device 100 to perform step 405.
  • the processing unit 1002 is specifically configured to: according to the number of orthogonal code sequences that can be multiplexed in the X second resource units and the number of orthogonal code sequences required to transmit SFCI, determine that the number of The number K of terminal devices transmitting SFCI in the second resource unit; according to the index value U index of the first terminal device and the number K of terminal devices that can transmit SFCI in X second resource units, determine the number of terminal devices used to transmit SFCI
  • the frequency domain start position of the frequency domain resource is the first of the available PSFCH feedback resources A second resource unit.
  • the sending unit 1003 is specifically used to:
  • the second resource units are the first X second resource units, and the SFCI is sent to the second terminal device through one PSFCH.
  • the receiving unit 1001 is configured to receive side-line data from the second terminal device; the transmission resource of the side-line data includes M first resource units, and M is a positive integer; for example, the receiving unit 1001 can support The terminal device 100 executes step 802.
  • the processing unit 1002 is configured to determine the available PSFCH feedback resource according to the transmission resource of the side row data; the available PSFCH feedback resource includes P second resource units; and according to the available PSFCH feedback resource, the receiving member in the multicast group
  • the number Q of the first terminal device, the index value U index of the first terminal device, the number of orthogonal code sequences that can be multiplexed in the X second resource units determine the frequency domain resources used to transmit SFCI and the repeated transmission of SFCI Number of times;
  • X is the number of second resource units required to send SFCI, and X is an integer greater than or equal to 1;
  • SFCI is used to at least indicate whether the first terminal device correctly receives the side line data.
  • the processing unit 1002 may support the terminal device 100 to perform step 803 and step 804.
  • the sending unit 1003 is configured to repeatedly send the SFCI to the second terminal device according to the frequency domain resource used to send the SFCI and the number of repeated sending of the SFCI.
  • the sending unit 1003 may support the terminal device 100 to perform step 805.
  • the processing unit 1002 is specifically configured to: determine the number of orthogonal code sequences that can be multiplexed in the X second resource units and the number of orthogonal codes required to transmit SFCI.
  • the processing unit 1002 is further configured to determine to send the SFCI according to the index value U index of the first terminal device and the number L of orthogonal code sequences that can be multiplexed in the X second resource units.
  • the required orthogonal code sequence is an orthogonal code sequence with an index mod (2 ⁇ UE index , L) and an orthogonal code sequence with an index mod (2 ⁇ UE index +1, L).
  • the index value U index of the first terminal device is preconfigured; or, the index value U index of the first terminal device is notified to the first terminal device by the second terminal device; or, The index value U index of a terminal device is determined according to the SFCI sent by the receiving member in the multicast group.
  • the number of receiving members in the multicast group is notified to the first terminal device by the second terminal device.
  • the processing unit 1002 in FIG. 10 may be replaced by a processor, which may integrate the functions of the processing unit 1002.
  • the sending unit 1003 and the receiving unit 1001 in FIG. 10 can be replaced by a transceiver, which can integrate the functions of the sending unit 1003 and the receiving unit 1001.
  • the terminal device 100 shown in FIG. 10 may also include a memory.
  • the terminal device 100 involved in the embodiment of the present application may be the terminal device shown in FIG. 3.
  • FIG. 11 shows a structural diagram of a terminal device 110.
  • the terminal device 110 may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the terminal device 110 may be used to execute the above-mentioned embodiments.
  • the terminal device 110 shown in FIG. 11 includes: a sending unit 1101 and a receiving unit 1103;
  • the sending unit 1101 is configured to send sideline data to the first terminal device; the transmission resource of the sideline data includes M first resource units, and M is a positive integer.
  • the sending unit 1101 may support the terminal device 110 to perform step 401.
  • the processing unit 1102 is configured to determine the available PSFCH feedback resource according to the transmission resource of the side row data; the available PSFCH feedback resource includes P second resource units; and according to the available PSFCH feedback resource, the index U index of the first terminal device , The number of orthogonal code sequences that can be multiplexed in X second resource units to determine the frequency domain resources used to send SFCI; X is the number of second resource units required to send SFCI, and X is greater than or equal to 1. Integer; SFCI is used to at least indicate whether the first terminal device correctly receives sideline data. For example, the processing unit 1102 may support the terminal device 110 to perform step 406.
  • the receiving unit 1103 is configured to receive the SFCI from the first terminal device on the frequency domain resource used to send the SFCI.
  • the receiving unit 1103 may support the terminal device 110 to perform step 406.
  • the processing unit 1102 is specifically configured to: according to the number of orthogonal code sequences that can be multiplexed in the X second resource units and the number of orthogonal code sequences required for sending SFCI, determine that the X second resource The number K of terminal devices transmitting SFCI in a unit; according to the index value U index of the first terminal device and the number K of terminal devices that can transmit SFCI in X second resource units, the frequency domain for transmitting SFCI is determined The starting position of the resource in the frequency domain is the first of the available PSFCH feedback resources A second resource unit.
  • the receiving unit 1103 is specifically configured to:
  • the second resource units are the first X second resource units, and the SFCI from the first terminal device is received through one PSFCH. Based on this possible design, the receiving unit 1103 can receive one SFCI sent by the first terminal device on the PSFCH feedback resource.
  • the sending unit 1101 is configured to send side-line data to the first terminal device; the transmission resource of the side-line data includes M first resource units, and M is a positive integer.
  • the sending unit 1101 may support the terminal device 110 to perform step 801.
  • the processing unit 1102 is configured to determine the available PSFCH feedback resources according to the transmission resources of the side-line data; the available PSFCH feedback resources include P second resource units; and according to the available PSFCH feedback resources, the number of receiving members in the multicast group
  • X is The number of second resource units required to send the SFCI, X is an integer greater than or equal to 1, and the SFCI is used to indicate whether the first terminal device correctly receives the side row data.
  • the processing unit 1102 may support the terminal device 110 to perform step 806.
  • the receiving unit 1103 is configured to receive the SFCI repeatedly sent by the first terminal device on the frequency domain resource used for sending the SFCI.
  • the receiving unit 1103 may support the terminal device 110 to perform step 806.
  • the processing unit 1102 is specifically configured to: according to the number of orthogonal code sequences that can be multiplexed in the X second resource units and the number of orthogonal codes required to transmit SFCI, determine that the X second resource units can be used
  • the number K of terminal devices transmitting SFCI within the multicast group according to the number Q of receiving members in the multicast group and the number K of terminal devices that can transmit SFCI in X second resource units, determine all receiving members to the second terminal
  • the number of second resource units required by the device to send SFCI once According to the number P and S of the second resource units of the available PSFCH feedback resources, determine the minimum number of times that all receiving members can repeatedly send SFCI to the second terminal device on the available PSFCH feedback resources
  • the number of redundant second resource units in the available PSFCH feedback resources Re mod(P, S); according to the index value U index of the first terminal device, the number of terminal devices that can transmit SFCI in X second resource units
  • the unit is the first Rp ⁇ X second resource unit, and the SFCI sent by the first terminal device is received Rp times through one PSFCH.
  • the receiving unit 1103 can receive multiple SFCIs repeatedly sent by the first terminal device on the PSFCH feedback resource.
  • the processing unit 1102 is further configured to determine the correctness required to send the SFCI according to the index value U index of the first terminal device and the number L of orthogonal code sequences that can be multiplexed in the X second resource units.
  • the cross code sequence is an orthogonal code sequence with an index mod (2 ⁇ UE index , L) and an orthogonal code sequence with an index mod (2 ⁇ UE index +1, L).
  • the index value U index of the first terminal device is pre-configured; or the index value U index of the first terminal device is notified to the first terminal device by the second terminal device; or the index value U index of the first terminal device is based on Determined by receiving SFCI sent by members in the multicast group.
  • the processing unit 1102 in FIG. 11 may be replaced by a processor, and the processor may integrate the functions of the processing unit 1102.
  • the sending unit 1101 and the receiving unit 1103 in FIG. 11 can be replaced by a transceiver, which can integrate the functions of the sending unit 1101 and the receiving unit 1103.
  • the terminal device 110 shown in FIG. 11 may also include a memory.
  • the terminal device 110 involved in the embodiment of the present application may be the terminal device shown in FIG. 3.
  • FIG. 12 is a structural diagram of an SFCI sending system provided by an embodiment of this application. As shown in FIG. 12, the system may include: a first terminal device 120, a second terminal device 121, and may also include: a third terminal device 120.
  • the first terminal device 120 and the third terminal device 120 have the functions of the terminal device 100 shown in FIG. 10.
  • the second terminal device 121 has the function of the terminal device 110 shown in FIG. 11.
  • the first terminal device 120 is configured to determine the available PSFCH feedback resource according to the sideline data received from the second terminal device 121, and according to the available PSFCH feedback resource, the index of the first terminal device 120, and the reusable The number of orthogonal code sequences for determining the frequency domain resource used to send the SFCI, and the SFCI is sent to the second terminal device 121 according to the frequency domain resource used to send the SFCI.
  • the first terminal device 120 is configured to determine the available PSFCH feedback resource according to the sideline data received from the second terminal device 121, and according to the available PSFCH feedback resource, the number of receiving members in the multicast group,
  • the index of the first terminal device 120 and the number of orthogonal code sequences that can be multiplexed determine the frequency domain resource used to transmit SFCI and the number of repeated transmissions of SFCI, and the frequency domain resource used to transmit SFCI and the repeated transmission of SFCI are determined.
  • the SFCI is repeatedly transmitted to the second terminal device 121 the number of times.
  • the specific implementation process of the first terminal device 120 can refer to the implementation process of the first terminal device involved in the method embodiments of FIGS. 4 and 8, and the specific implementation process of the second terminal device 121 can refer to The foregoing method embodiments in FIGS. 4 and 8 relate to the execution process of the second terminal device.
  • the first terminal device 120 in the multicast group determines the available PSFCH feedback resource according to the transmission resource of the received sideline data
  • the first terminal device 120 sends the SFCI once through the index of the terminal device. It is determined that the SFCI sent by the first terminal device 120 to the second terminal device 121 starts in the frequency domain of the available PSFCH feedback resources, such as the size of the resource unit, the available orthogonal code sequence, the number of members in the multicast group, etc.
  • the position, the frequency domain bandwidth of SFCI and the orthogonal code sequence used to send SFCI realize the SFCI feedback of multiple first terminal devices 120 to PSSCH transmission in multicast communication, especially the ACK/NACK feedback, and solve the existing problem of multicast
  • the SFCI fed back by each first terminal device 120 determines the problem of frequency domain resources.
  • the embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the foregoing method embodiments may be completed by a computer program instructing relevant hardware.
  • the program may be stored in the foregoing computer-readable storage medium. When the program is executed, it may include processes as in the foregoing method embodiments. .
  • the computer-readable storage medium may be an internal storage unit of the terminal device (including the data sending end and/or the data receiving end) of any of the foregoing embodiments, such as the hard disk or memory of the terminal device.
  • the computer-readable storage medium may also be an external storage device of the terminal device, for example, a plug-in hard disk, a smart media card (SMC), or a secure digital (SD) card equipped on the terminal device. Flash card, etc.
  • the aforementioned computer-readable storage medium may also include both an internal storage unit of the aforementioned terminal device and an external storage device.
  • the aforementioned computer-readable storage medium is used to store the aforementioned computer program and other programs and data required by the aforementioned terminal device.
  • the aforementioned computer-readable storage medium can also be used to temporarily store data that has been output or will be output.
  • At least one (item) refers to one or more
  • “multiple” refers to two or more than two
  • “at least two (item)” refers to two or three And three or more
  • "and/or” is used to describe the association relationship of the associated objects, indicating that there can be three relationships, for example, "A and/or B” can mean: only A, only B and A And B three cases, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are in an “or” relationship.
  • “The following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • At least one (a) of a, b or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c" ", where a, b, and c can be single or multiple.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be other division methods for example, multiple units or components may be It can be combined or integrated into another device, or some features can be omitted or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate parts may or may not be physically separate.
  • the parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of software products, which are stored in a storage medium.
  • a device which may be a single-chip microcomputer, a chip, etc.
  • a processor processor
  • the aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请公开一种SFCI的发送方法以及装置，涉及通信技术领域，特别是V2X，智能汽车，自动驾驶，智能网联汽车等。该方法包括：第一终端装置根据第二终端装置发的侧行数据确定可用的PSFCH反馈资源，根据可用的PSFCH反馈资源、第一终端装置的索引、可复用的正交码序列的个数确定用于发送SFCI的频域资源，根据用于发送SFCI的频域资源向第二终端装置发送SFCI；或，根据可用的PSFCH反馈资源、组播组中接收成员的个数、第一终端装置的索引、可复用的正交码序列的个数确定用于发送SFCI的频域资源和SFCI的重复发送次数，根据用于发送SFCI的频域资源和SFCI的重复发送次数向第二终端装置重复发送SFCI。

Description

一种SFCI的发送方法以及装置 技术领域
本申请实施例涉及通信技术领域，尤其涉及一种侧行反馈控制信息(sidelink feedback control information，SFCI)的发送方法以及装置。
背景技术
车与任何事物(vehicle-to-everything，V2X)通信系统中，终端装置与终端装置之间可以通过直连链路(如：侧行链路(sidelink，SL))进行侧行通信。为了提高侧行通信的效率，V2X通信系统中引入了组播通信的概念。组播通信中，一个组播组至少可以包括两个接收终端以及一个发送终端，发送终端可以通过SL上的物理侧行共享信道(physical sidelink shared channel，PSSCH)，在同一时刻向该组播组中的多个接收终端发送侧行数据。
其中，为了提高侧行通信的可靠性以及降低通信时延，第三代合作伙伴计划(3rd generation partnership project，3GPP)针对侧行链路又定义了物理侧行反馈信道(physical sidelink feedback channel，PSFCH)，PSFCH可以用于发送SFCI，SFCI至少可以包括接收终端向发送终端反馈是否成功接收侧行数据的信息。例如，发送终端通过PSSCH，向接收终端发送侧行数据后，接收终端可以根据侧行数据的接收情况在PSFCH信道上向发送终端发送SFCI；发送终端接收到SFCI后，可以根据SFCI选择合适的侧行通信资源重新调度侧行数据或者新传侧行数据，以提高侧行数据的发送成功率，进而提高侧行通信的可靠性以及降低通信时延。
然而，现有技术中，并未规定V2X通信系统的组播通信场景下，多个接收终端如何在同一反馈资源上向发送终端发送SFCI，影响发送终端向接收终端反馈SFCI。
发明内容
本申请实施例提供一种SFCI的发送方法以及装置，解决组播通信下多个接收终端发送SFCI的问题。
为达到上述目的，本申请实施例采用如下技术方案：
第一方面，提供一种SFCI的发送方法，该方法可以包括：第一终端装置从第二终端装置接收包括M个第一资源单元的侧行数据，根据接收到的侧行数据的传输资源，确定可用的包括P个第二资源单元的PSFCH反馈资源，根据可用的PSFCH反馈资源、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源，根据用于发送SFCI的频域资源，向第二终端装置发送SFCI；X为发送SFCI需要的第二资源单元的个数，X为大于等于1的整数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。
基于第一方面所述的方法，组播组中的第一终端装置根据接收到的侧行数据的传输资源确定可用的PSFCH反馈资源后，第一终端装置通过第一终端装置的索引、发送一次SFCI需要的资源单元的大小以及可用正交码序列等信息，确定第一终端装置向第二终端装置发送的SFCI在可用的PSFCH反馈资源的频域起始位置和频域带宽、发送SFCI使用的正交码序列，实现组播通信中多个第一终端装置的SFCI反馈，尤其是ACK/NACK反馈，解决 现有无法为组播通信场景下终端装置反馈的SFCI确定频域资源的问题。
一种可能的设计中，结合第一方面，用于发送SFCI的频域资源包括用于发送SFCI的频域资源的频域起始位置，第一终端装置根据可用的PSFCH反馈资源、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源，包括：第一终端装置根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码序列的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据第一终端装置的索引值U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第
Figure PCTCN2019101155-appb-000001
个第二资源单元。基于该可能的设计，可以根据第一终端装置的索引、发送一次SFCI需要的资源单元的大小以及可用正交码序列确定用于发送SFCI的频域资源的频域起始位置。
一种可能的设计中，结合第一方面的任一可能的设计，第一终端装置根据用于发送SFCI的频域资源，向第二终端装置发送SFCI，包括：在以第
Figure PCTCN2019101155-appb-000002
个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH向第二终端装置发送SFCI。基于该可能的设计，第一终端装置可以在PSFCH反馈资源上向第二终端装置发送一次SFCI，以使得组播组中的多个终端将自身的SFCI复用在PSFCH反馈资源一起发送给第二终端装置。
一种可能的设计中，结合第一方面或第一方面的任一可能的设计，所述方法还包括：第一终端装置根据第一终端装置的索引值U index以及X个第二资源单元内可复用的正交码序列的个数L，确定发送SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。基于该可能的设计，根据第一终端装置的索引确定发送第一终端装置反馈的SFCI所使用的正交码序列，以使得组播组中的终端使用不同的正交码序列向第二终端装置反馈SFCI。
一种可能的设计中，结合第一方面或第一方面的任一可能的设计，第一终端装置的索引值U index预先配置；或者，第一终端装置的索引值U index由第二终端装置通知给第一终端装置；或者，第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。基于该可能的设计，可以通过多种方式获取终端装置的索引，实现方式灵活多样。
第二方面，本申请提供一种终端装置，该终端装置可以为第一终端装置或者第一终端装置中的芯片或者片上系统，还可以为第一终端装置中用于实现第一方面或第一方面的任一可能的设计所述的方法的功能模块。该终端装置可以实现上述各方面或者各可能的设计中第一终端装置所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该终端装置包括：接收单元，处理单元以及发送单元。
接收单元，用于从第二终端装置接收侧行数据；侧行数据的传输资源包括M个第一资源单元，M为正整数。
处理单元，用于根据侧行数据的传输资源，确定可用的PSFCH反馈资源；可用的PSFCH反馈资源包括P个第二资源单元；以及根据可用的PSFCH反馈资源、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源；X为发送SFCI需要的第二资源单元的个数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。
发送单元，用于根据用于发送SFCI的频域资源，向第二终端装置发送SFCI。
其中，该终端装置的具体实现方式可参考第一方面或第一方面的任一种可能的设计提供的SFCI的发送方法中第一终端装置的行为功能，如：基于第二方面，组播组中的第一终端装置根据接收到的侧行数据的传输资源确定可用的PSFCH反馈资源后，第一终端装置通过第一终端装置的索引、发送一次SFCI需要的资源单元的大小以及可用正交码序列等信息，确定第一终端装置向第二终端装置发送的SFCI在可用的PSFCH反馈资源的频域起始位置和频域带宽、发送SFCI使用的正交码序列，实现组播通信中多个第一终端装置的SFCI反馈，尤其是ACK/NACK反馈，解决现有无法为组播通信场景下终端装置反馈的SFCI确定频域资源的问题。
一种可能的设计中，结合第二方面，用于发送SFCI的频域资源包括用于发送SFCI的频域资源的频域起始位置，处理单元，具体用于：根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码序列的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据第一终端装置的索引值U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第
Figure PCTCN2019101155-appb-000003
个第二资源单元。基于该可能的设计，处理单元可以根据第一终端装置的索引、发送一次SFCI需要的资源单元的大小以及可用正交码序列确定用于发送SFCI的频域资源的频域起始位置。
一种可能的设计中，结合第二方面或者第二方面的任一可能的设计，发送单元，具体用于：在以第
Figure PCTCN2019101155-appb-000004
个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH向第二终端装置发送SFCI。基于该可能的设计，发送单元可以在PSFCH反馈资源上向第二终端装置发送一次SFCI，以使得组播组中的多个终端将自身的SFCI复用在PSFCH反馈资源一起发送给第二终端装置。
一种可能的设计中，结合第二方面或者第二方面的任一可能的设计，处理单元，还用于：根据第一终端装置的索引值U index以及X个第二资源单元内可复用的正交码序列的个数L，确定发送SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。基于该可能的设计，处理单元可以根据第一终端装置的索引确定发送第一终端装置反馈的SFCI所使用的正交码序列，以使得组播组中的终端使用不同的正交码序列向第二终端装置反馈SFCI。
一种可能的设计中，结合第二方面或者第二方面的任一可能的设计，第一终端装置的索引值U index预先配置；或者，第一终端装置的索引值U index由第二终端装置通知给第一终端装置；或者，第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。基于该可能的设计，可以通过多种方式获取终端装置的索引，实现方式灵活多样。
第三方面，提供了一种终端装置，该终端装置可以为第一终端装置或者第一终端装置中的芯片或者片上系统。该终端装置可以实现上述各方面或者各可能的设计中第一终端装置所执行的功能，所述功能可以通过硬件实现，如：一种可能的设计中，该终端装置可以包括：处理器和收发器。处理器通过收发器从第二终端装置接收包括M个第一资源单元的侧行数据，根据侧行数据的传输资源，确定可用的PSFCH反馈资源；可用的PSFCH反馈资源包括P个第二资源单元；以及根据可用的PSFCH反馈资源、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源；根据 用于发送SFCI的频域资源，通过收发器向第二终端装置发送SFCI；X为发送SFCI需要的第二资源单元的个数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。在又一种可能的设计中，所述终端装置还可以包括存储器，所述存储器，用于保存终端装置必要的计算机执行指令和数据。当该终端装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该终端装置执行如上述第一方面或者第一方面的任一种可能的设计所述的SFCI的发送方法。
第四方面，提供了一种计算机可读存储介质，该计算机可读存储介质可以为可读的非易失性存储介质，该计算机可读存储介质存储有计算机指令或者程序，当其在计算机上运行时，使得计算机可以执行上述第一方面或者上述方面的任一种可能的设计所述的SFCI的发送方法。
第五方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第一方面或者上述方面的任一种可能的设计所述的SFCI的发送方法。
第六方面，提供了一种终端装置，该终端装置可以为第一终端装置或者第一终端装置中的芯片或者片上系统，该终端装置包括一个或者多个处理器以及和一个或多个存储器。所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述一个或多个处理器执行所述计算机指令时，使得所述终端装置执行如上述第一方面或者第一方面的任一可能的设计所述的SFCI的发送方法。
其中，第三方面至第六方面中任一种设计方式所带来的技术效果可参见上述第一方面或者第一方面的任一种可能的设计所带来的技术效果，不再赘述。
第七方面，提供又一种SFCI的发送方法，该方法包括：第二终端装置向第一终端装置发送包括M个第一资源单元的侧行数据，根据侧行数据的传输资源，确定包括P个第二资源单元的可用的PSFCH反馈资源，根据可用的PSFCH反馈资源、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源，在用于发送SFCI的频域资源上，接收来自第一终端装置的SFCI；X为发送SFCI需要的第二资源单元的个数，SFCI用于至少指示第一终端装置是否正确接收侧行数据。
基于第七方面所述的方法，组播组中组播侧行数据的第二终端装置根据侧行数据的传输资源确定可用的PSFCH反馈资源后，通过第一终端装置的索引、发送一次SFCI需要的资源单元的大小以及可用正交码序列等信息，确定第一终端装置向第二终端装置发送的SFCI在可用的PSFCH反馈资源的频域起始位置和频域带宽、发送SFCI使用的正交码序列，根据确定结果接收来自第一终端装置的SFCI，实现组播通信中多个第一终端装置的SFCI反馈，尤其是ACK/NACK反馈，解决现有无法为组播通信场景下终端装置反馈的SFCI确定频域资源的问题。
一种可能的设计中，结合第七方面或第七方面的任一可能的设计，用于发送SFCI的频域资源包括用于发送SFCI的频域资源的频域起始位置，第二终端装置根据可用的PSFCH反馈资源、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源，包括：根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码序列的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据第一终端装置的索引值U index、可在X个第二资源单 元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第
Figure PCTCN2019101155-appb-000005
个第二资源单元。基于该可能的设计，可以根据第一终端装置的索引、发送一次SFCI需要的资源单元的大小以及可用正交码序列确定用于发送SFCI的频域资源的频域起始位置。
一种可能的设计中，结合第七方面或第七方面的任一可能的设计，第二终端装置在用于发送发送SFCI的频域资源上，接收来自第一终端装置的SFCI，包括：第二终端装置在以第
Figure PCTCN2019101155-appb-000006
个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH接收来自第一终端装置的SFCI。基于该可能的设计，第二终端装置可以在PSFCH反馈资源上接收第一终端装置发送的一次SFCI。
一种可能的设计中，结合第七方面或第七方面的任一可能的设计，所述方法还包括：第二终端装置根据第一终端装置的索引值U index以及X个第二资源单元内可复用的正交码序列的个数L，确定发送SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。基于该可能的设计，根据第一终端装置的索引确定发送第一终端装置反馈的SFCI所使用的正交码序列，以使得组播组中的终端使用不同的正交码序列向第二终端装置反馈SFCI。
一种可能的设计中，结合第七方面或第七方面的任一可能的设计，第一终端装置的索引值U index预先配置；或者，第一终端装置的索引值U index由第二终端装置配置；或者，第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。基于该可能的设计，可以通过多种方式获取终端装置的索引，实现方式灵活多样。
第八方面，本申请提供一种终端装置，该终端装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统，还可以为第二终端装置中用于实现第七方面或第七方面的任一可能的设计所述的方法的功能模块。该终端装置可以实现上述各方面或者各可能的设计中第二终端装置所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该终端装置可以包括：发送单元，处理单元，接收单元；
发送单元，用于向第一终端装置发送包括M个第一资源单元的侧行数据。
处理单元，用于根据侧行数据的传输资源，确定可用的PSFCH反馈资源；可用的PSFCH反馈资源包括P个第二资源单元；以及根据可用的PSFCH反馈资源、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源；X为发送SFCI需要的第二资源单元的个数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。
接收单元，用于在用于发送SFCI的频域资源，接收来自第一终端装置的SFCI。
其中，该终端装置的具体实现方式可参考第七方面或第七方面的任一种可能的设计提供的SFCI的发送方法中第二终端装置的行为功能，第七方面或者第七方面的任一种可能的设计方法可以由该终端装置包括的处理单元以及发送单元对应实现。例如：第八方所述第二终端装置根据侧行数据的传输资源确定可用的PSFCH反馈资源后，通过第一终端装置的索引、发送一次SFCI需要的资源单元的大小以及可用正交码序列等信息，确定第一终端装置向第二终端装置发送的SFCI在可用的PSFCH反馈资源的频域起始位置和频域带宽、发送SFCI使用的正交码序列，根据确定结果接收来自第一终端装置的SFCI，实现组 播通信中多个第一终端装置的SFCI反馈，尤其是ACK/NACK反馈，解决现有无法为组播通信场景下终端装置反馈的SFCI确定频域资源的问题。
在一种可能的设计中，结合第七方面，处理单元，具体用于：根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码序列的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据第一终端装置的索引值U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第
Figure PCTCN2019101155-appb-000007
个第二资源单元。基于该可能的设计，处理单元可以根据第一终端装置的索引、发送一次SFCI需要的资源单元的大小以及可用正交码序列确定用于发送SFCI的频域资源的频域起始位置。
在一种可能的设计中，结合第七方面或第七方面的任一可能的设计，接收单元，具体用于：在以第
Figure PCTCN2019101155-appb-000008
个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH接收来自第一终端装置的SFCI。基于该可能的设计，接收单元可以在PSFCH反馈资源上接收第一终端装置发送的一次SFCI。
在一种可能的设计中，结合第七方面或第七方面的任一可能的设计，处理单元，还用于根据第一终端装置的索引值U index以及X个第二资源单元内可复用的正交码序列的个数L，确定发送SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。基于该可能的设计，处理器可以根据第一终端装置的索引确定发送第一终端装置反馈的SFCI所使用的正交码序列，以使得组播组中的终端使用不同的正交码序列向第二终端装置反馈SFCI。
在一种可能的设计中，结合第七方面或第七方面的任一可能的设计，第一终端装置的索引值U index预先配置；或者，第一终端装置的索引值U index由第二终端装置配置；或者，第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。基于该可能的设计，可以通过多种方式获取终端装置的索引，实现方式灵活多样。
第九方面，提供了一种终端装置，该终端装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统。该终端装置可以实现上述各方面或者各可能的设计中第二终端装置所执行的功能，所述功能可以通过硬件实现，如：一种可能的设计中，该终端装置可以包括：处理器和收发器。处理器通过收发器向第一终端装置发送包括M个第一资源单元的侧行数据，根据侧行数据的传输资源，确定可用的PSFCH反馈资源；可用的PSFCH反馈资源包括P个第二资源单元；以及根据可用的PSFCH反馈资源、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源，在用于发送SFCI的频域资源，通过收发器接收来自第一终端装置的SFCI；X为发送SFCI需要的第二资源单元的个数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。在又一种可能的设计中，所述终端装置还可以包括存储器，所述存储器，用于保存终端装置必要的计算机执行指令和数据。当该终端装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该终端装置执行如上述第七方面或者第七方面的任一种可能的设计所述的SFCI的发送方法。
第十方面，提供了一种计算机可读存储介质，该计算机可读存储介质可以为可读的非易失性存储介质，该计算机可读存储介质存储有计算机指令，当其在计算机上运行时，使得计算机可执行上述第七方面或者上述方面的任一种可能的设计所述的SFCI的发送方法。
第十一方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第七方面或者上述方面的任一种可能的设计所述的SFCI的发送方法。
第十二方面，提供了一种终端装置，该终端装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统，该终端装置包括一个或者多个处理器以及和一个或多个存储器。所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述一个或多个处理器执行所述计算机指令时，使得所述终端装置执行如上述第七方面或者第七方面的任一可能的设计所述的SFCI的发送方法。
其中，第九方面至第十二方面中任一种设计方式所带来的技术效果可参见上述第七方面或者第七方面的任一种可能的设计所带来的技术效果，不再赘述。
第十三方面，提供一种SFCI的发送方法，该方法可以包括：第一终端装置从第二终端装置接收包括M个第一资源单元的侧行数据，根据接收到的侧行数据的传输资源，确定可用的包括P个第二资源单元的PSFCH反馈资源，根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数，根据用于发送SFCI的频域资源和SFCI的重复发送次数，向第二终端装置重复发送SFCI；X为发送SFCI需要的第二资源单元的个数，X为大于等于1的整数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。
基于第十三方面所述的方法，组播组中的第一终端装置根据接收到的侧行数据的传输资源确定可用的PSFCH反馈资源后，第一终端装置通过终端装置的索引、发送一次SFCI需要的资源单元的大小、可用正交码序列以及组播组中接收成员的数量等信息，确定第一终端装置向第二终端装置发送的SFCI在可用的PSFCH反馈资源的频域起始位置和频域带宽、发送SFCI使用的正交码序列，实现组播通信中多个第一终端装置的SFCI反馈，尤其是ACK/NACK反馈，解决现有无法为组播通信场景下终端装置反馈的SFCI确定频域资源的问题。同时，利用PSFCH反馈资源向发送终端重复发送SFCI提高传输可靠性，此外，重复传输SFCI时占用连续的频域资源可以进一步降低功率影响，提高SFCI传输可靠性。
一种可能的设计中，结合第十三方面，用于发送SFCI的频域资源包括用于发送SFCI的频域资源的频域起始位置，第一终端装置根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数，包括：第一终端装置根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据组播组中接收成员的个数Q以及可在X个第二资源单元内传输SFCI的终端装置的个数K，确定所有接收成员向第二终端装置发送一次SFCI需要的第二资源单元的个数
Figure PCTCN2019101155-appb-000009
根据可用的PSFCH反馈资源的第二资源单元的个数P以及S，确定所有接收成员在可用的PSFCH反馈资源上，可重复向第二终端装置发送SFCI的最少次数
Figure PCTCN2019101155-appb-000010
以及可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；根据第一终端装置的索引值U index、可在X个第二资源单元传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置的逻辑索引为：
Figure PCTCN2019101155-appb-000011
若i<Re，则确定用于发送SFCI的频域资 源的频域起始位置为可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，SFCI的重复发送次数为Rp+1；若i>Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,SFCI的重复发送次数为Rp。基于该可能的设计，可以根据第一终端装置的索引、发送一次SFCI需要的资源单元的大小、组播组中接收成员的个数以及可用正交码序列，确定用于发送SFCI的频域资源的频域起始位置以及SFCI的重复发送次数，以使得多个组播组中的终端使用不同的正交码序列重复向第二终端装置反馈SFCI。
一种可能的设计中，结合第十三方面的任一可能的设计，第一终端装置根据频域资源的频域起始位置以及SFCI的重复发送次数，向第二终端装置重复发送SFCI，包括：若i<Re，第一终端装置在以第i×(Rp+1)×X个第二资源单元为起始的(Rp+1)×X个第二资源单元上，通过一个PSFCH向第二终端装置发送(Rp+1)次SFCI；若i>＝Re，第一终端装置在以第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元为起始的Rp×X个第二资源单元上，通过一个PSFCH向第二终端装置发送Rp次SFCI。基于该可能的设计，第一终端装置可以在PSFCH反馈资源上向第二终端装置重复发送多次SFCI，提高SFCI的传输可靠性。
一种可能的设计中，结合第十三方面或第十三方面的任一可能的设计，所述方法还包括：第一终端装置根据第一终端装置的索引值U index以及X个第二资源单元内可复用的正交码序列的个数L，确定发送SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。基于该可能的设计，根据第一终端装置的索引确定发送第一终端装置反馈的SFCI所使用的正交码序列，以使得组播组中的终端使用不同的正交码序列向第二终端装置反馈SFCI。
一种可能的设计中，结合第十三方面或第十三方面的任一可能的设计，第一终端装置的索引值U index预先配置；或者，第一终端装置的索引值U index由第二终端装置通知给第一终端装置；或者，第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。基于该可能的设计，可以通过多种方式获取终端装置的索引，实现方式灵活多样。
一种可能的设计中，结合第十三方面或第十三方面的任一可能的设计，组播组中接收成员的个数由第二终端装置通知给第一终端装置。基于该可能的设计，第一终端装置可以从第二终端装置获取组播组中接收成员的个数，简单易行。
第十四方面，本申请提供一种终端装置，该终端装置可以为第一终端装置或者第一终端装置中的芯片或者片上系统，还可以为第一终端装置中用于实现第十三方面或第十三方面的任一可能的设计所述的方法的功能模块。该终端装置可以实现上述各方面或者各可能的设计中第一终端装置所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该终端装置包括：接收单元，处理单元以及发送单元。
接收单元，用于从第二终端装置接收包括M个第一资源单元的侧行数据。
处理单元，用于根据接收到的侧行数据的传输资源，确定可用的包括P个第二资源单元的PSFCH反馈资源，根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数；X为发送SFCI需要的第二资源单元的个数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。
发送单元，用于根据用于发送SFCI的频域资源和SFCI的重复发送次数，向第二终端装置重复发送SFCI。
其中，该终端装置的具体实现方式可参考第十三方面或第十三方面的任一种可能的设计提供的SFCI的发送方法中第一终端装置的行为功能，第十三方面或者第十三方面的任一种可能的设计方法可以由该终端装置包括的处理单元以及发送单元对应实现，在此不再重复赘述。因此，该终端装置可以达到与第十三方面或者第十三方面的任一种可能的设计相同的有益效果。
一种可能的设计中，结合第十三方面，用于发送SFCI的频域资源包括用于发送SFCI的频域资源的频域起始位置；处理单元，具体用于：根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据组播组中接收成员的个数Q以及可在X个第二资源单元内传输SFCI的终端装置的个数K，确定所有接收成员向第二终端装置发送一次SFCI需要的第二资源单元的个数
Figure PCTCN2019101155-appb-000012
根据可用的PSFCH反馈资源的第二资源单元的个数P以及S，确定所有接收成员在可用的PSFCH反馈资源上，可重复向第二终端装置发送SFCI的最少次数
Figure PCTCN2019101155-appb-000013
以及可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；根据第一终端装置的索引值U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置的逻辑索引为：
Figure PCTCN2019101155-appb-000014
Figure PCTCN2019101155-appb-000015
若i<Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，SFCI的重复发送次数为Rp+1；若i>＝Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,SFCI的重复发送次数为Rp。基于该可能的设计，处理单元可以根据第一终端装置的索引、发送一次SFCI需要的资源单元的大小、组播组中接收成员的个数以及可用正交码序列，确定用于发送SFCI的频域资源的频域起始位置以及SFCI的重复发送次数，以使得多个组播组中的终端使用不同的正交码序列重复向第二终端装置反馈SFCI。
一种可能的设计中，结合第十三方面或第十三方面的任一可能的设计，发送单元，具体用于：若i<Re，在以第i×(Rp+1)×X个第二资源单元为起始的(Rp+1)×X个第二资源单元上，通过一个PSFCH向第二终端装置发送(Rp+1)次SFCI；若i>＝Re，在以第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元为起始的Rp×X个第二资源单元上，通过一个PSFCH向第二终端装置发送Rp次SFCI。基于该可能的设计，发送单元可以在PSFCH反馈资源上向第二终端装置重复发送多次SFCI，提高SFCI的传输可靠性。
一种可能的设计中，结合第十三方面或第十三方面的任一可能的设计，处理单元，还用于根据第一终端装置的索引值U index以及X个第二资源单元内可复用的正交码序列的个数L，确定发送SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。基于该可能的设计，根据第一终端装置的索引确定发送第一终端装置反馈的SFCI所使用的正交码序列，以使得组播组中的终端使用不同的正交码序列向第二终端装置反馈SFCI。
一种可能的设计中，结合第十三方面或第十三方面的任一可能的设计，第一终端装置的索引值U index预先配置；或者，第一终端装置的索引值U index由第二终端装置通知给第一 终端装置；或者，第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。基于该可能的设计，可以通过多种方式获取终端装置的索引，实现方式灵活多样。
一种可能的设计中，结合第十三方面或第十三方面的任一可能的设计，组播组中接收成员的个数由第二终端装置通知给第一终端装置。基于该可能的设计，第一终端装置可以从第二终端装置获取组播组中接收成员的个数，简单易行。
第十五方面，提供了一种终端装置，该终端装置可以为第一终端装置或者第一终端装置中的芯片或者片上系统。该终端装置可以实现上述各方面或者各可能的设计中第一终端装置所执行的功能，所述功能可以通过硬件实现，如：一种可能的设计中，该终端装置可以包括：处理器和收发器。处理器通过收发器从第二终端装置接收包括M个第一资源单元的侧行数据，根据接收到的侧行数据的传输资源，确定可用的包括P个第二资源单元的PSFCH反馈资源，根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数；根据根据用于发送SFCI的频域资源和SFCI的重复发送次数，通过收发器向第二终端装置发送SFCI；X为发送SFCI需要的第二资源单元的个数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。在又一种可能的设计中，所述终端装置还可以包括存储器，所述存储器，用于保存终端装置必要的计算机执行指令和数据。当该终端装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该终端装置执行如上述第十三方面或者第十三方面的任一种可能的设计所述的SFCI的发送方法。
第十六方面，提供了一种计算机可读存储介质，该计算机可读存储介质可以为可读的非易失性存储介质，计算机可读存储介质存储有计算机指令，当其在计算机上运行时，使得计算机执行上述第十三方面或者上述方面的任一种可能的设计所述的SFCI的发送方法。
第十七方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第十三方面或者上述方面的任一种可能的设计所述的SFCI的发送方法。
第十八方面，提供了一种终端装置，该终端装置可以为第一终端装置或者第一终端装置中的芯片或者片上系统，该终端装置包括一个或者多个处理器以及和一个或多个存储器。所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述一个或多个处理器执行所述计算机指令时，使得所述终端装置执行如上述第十三方面或者第十三方面的任一可能的设计所述的SFCI的发送方法。
其中，第十五方面至第十八方面中任一种设计方式所带来的技术效果可参见上述第十三方面或者第十三方面的任一种可能的设计所带来的技术效果，不再赘述。
第十九方面，提供又一种SFCI的发送方法，该方法包括：第二终端装置向第一终端装置发送包括M个第一资源单元的侧行数据，根据侧行数据的传输资源，确定包括P个第二资源单元的可用的PSFCH反馈资源，根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数，在用于发送SFCI的频域资源上，接收第一终端装置重复发送的SFCI；X为发送SFCI需要的第二资源单元的个数，SFCI用于至少指示第一终端装置是否正确接收侧行数据。
基于第十九方面所述的方法，组播组中组播侧行数据的第二终端装置根据侧行数据的传输资源确定可用的PSFCH反馈资源后，通过通过终端装置的索引、发送一次SFCI需要的资源单元的大小、可用正交码序列以及组播组中接收成员的数量等信息，确定第一终端装置向第二终端装置发送的SFCI在可用的PSFCH反馈资源的频域起始位置和频域带宽、发送SFCI使用的正交码序列，根据确定结果接收来自第一终端装置的SFCI，实现组播通信中多个第一终端装置的SFCI反馈，尤其是ACK/NACK反馈，解决现有无法为组播通信场景下终端装置反馈的SFCI确定频域资源的问题。同时，发送终端重复发送SFCI提高传输可靠性，此外，重复传输SFCI时占用连续的频域资源可以进一步降低功率影响，提高SFCI传输可靠性。
一种可能的设计中，结合第十九方面或第十九方面的任一可能的设计，用于发送SFCI的频域资源包括用于发送SFCI的频域资源的频域起始位置，第二终端装置根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数，包括：根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据组播组中接收成员的个数Q以及可在X个第二资源单元内传输SFCI的终端装置的个数K，确定所有接收成员向第二终端装置发送一次SFCI需要的第二资源单元的个数
Figure PCTCN2019101155-appb-000016
根据可用的PSFCH反馈资源的第二资源单元的个数P以及S，确定所有接收成员在可用的PSFCH反馈资源上，可重复向第二终端装置发送SFCI的最少次数
Figure PCTCN2019101155-appb-000017
以及可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；根据第一终端装置的索引值U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置的逻辑索引为：
Figure PCTCN2019101155-appb-000018
若i<Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，SFCI的重复发送次数为Rp+1；若i>Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,SFCI的重复发送次数为Rp。基于该可能的设计，可以根据第一终端装置的索引、发送一次SFCI需要的资源单元的大小、组播组中接收成员的个数以及可用正交码序列确定用于发送SFCI的频域资源的频域起始位置。
一种可能的设计中，结合第十九方面或第十九方面的任一可能的设计，第二终端装置在用于发送发送SFCI的频域资源上，接收第一终端装置重复发送的SFCI，包括：若i<Re，第二终端装置在以第i×(Rp+1)×X个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH接收第一终端装置重复发送的Rp+1次SFCI；若i>＝Re，在以第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元为起始的Rp×X个第二资源单元上，通过一个PSFCH接收第一终端装置重复发送的Rp次SFCI。基于该可能的设计，第二终端装置可以在PSFCH反馈资源上接收第一终端装置重复发送的多次SFCI。
一种可能的设计中，结合第十九方面或第十九方面的任一可能的设计，所述方法还包括：第二终端装置根据第一终端装置的索引值U index以及X个第二资源单元内可复用的正交码序列的个数L，确定发送SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。基于该可能的设计，根据第一终端装置 的索引确定发送第一终端装置反馈的SFCI所使用的正交码序列，以使得组播组中的终端使用不同的正交码序列向第二终端装置反馈SFCI。
一种可能的设计中，结合第十九方面或第十九方面的任一可能的设计，第一终端装置的索引值U index预先配置；或者，第一终端装置的索引值U index由第二终端装置配置；或者，第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。基于该可能的设计，可以通过多种方式获取终端装置的索引，实现方式灵活多样。
第二十方面，本申请提供一种终端装置，该终端装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统，还可以为第二终端装置中用于实现第十九方面或第十九方面的任一可能的设计所述的方法的功能模块。该终端装置可以实现上述各方面或者各可能的设计中第二终端装置所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该终端装置可以包括：发送单元，处理单元，接收单元；
发送单元，用于向第一终端装置发送包括M个第一资源单元的侧行数据。
处理单元，用于根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数；X为发送SFCI需要的第二资源单元的个数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。
接收单元，用于在用于发送SFCI的频域资源，接收第一终端装置重复发送的SFCI。
其中，该终端装置的具体实现方式可参考第十九方面或第十九方面的任一种可能的设计提供的SFCI的发送方法中第二终端装置的行为功能，第十九方面或者第十九方面的任一种可能的设计方法可以由该终端装置包括的处理单元以及发送单元对应实现，在此不再重复赘述。因此，该终端装置可以达到与第十九方面或者第十九方面的任一种可能的设计相同的有益效果。
一种可能的设计中，结合第十九方面，用于发送SFCI的频域资源包括用于发送SFCI的频域资源的频域起始位置；处理单元，具体用于：根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据组播组中接收成员的个数Q以及可在X个第二资源单元内传输SFCI的终端装置的个数K，确定所有接收成员向第二终端装置发送一次SFCI需要的第二资源单元的个数
Figure PCTCN2019101155-appb-000019
根据可用的PSFCH反馈资源的第二资源单元的个数P以及S，确定所有接收成员在可用的PSFCH反馈资源上，可重复向第二终端装置发送SFCI的最少次数
Figure PCTCN2019101155-appb-000020
以及可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；根据第一终端装置的索引值U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置的逻辑索引为：
Figure PCTCN2019101155-appb-000021
Figure PCTCN2019101155-appb-000022
若i<Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，SFCI的重复发送次数为Rp+1；若i>＝Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,SFCI的重复发送次数为Rp。基于该可能的设计，处理单元根据第一终端装置的索引、发送一次SFCI需要的资源单元的大小、组播组中接收成员的个数以及可用正交码序列确定用于发送SFCI的频域资源的频域起始位置。
一种可能的设计中，结合第十九方面或第十九方面的任一可能的设计，发送单元，具体用于：若i<Re，在以第i×(Rp+1)×X个第二资源单元为起始的(Rp+1)×X个第二资源单元上，通过一个PSFCH接收第一终端装置发送的(Rp+1)次SFCI；若i>＝Re，在以第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元为起始的Rp×X个第二资源单元上，通过一个PSFCH接收第一终端装置发送的Rp次SFCI。基于该可能的设计，接收单元可以在PSFCH反馈资源上接收第一终端装置重复发送的多次SFCI。
一种可能的设计中，结合第十九方面或第十九方面的任一可能的设计，处理单元，还用于根据第一终端装置的索引值U index以及X个第二资源单元内可复用的正交码序列的个数L，确定接收的SFCI使用的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。基于该可能的设计，处理单元可以根据第一终端装置的索引确定发送第一终端装置反馈的SFCI所使用的正交码序列，以使得组播组中的终端使用不同的正交码序列向第二终端装置反馈SFCI。
一种可能的设计中，结合第十九方面或第十九方面的任一可能的设计，第一终端装置的索引值U index预先配置；或者，第一终端装置的索引值U index由第二终端装置配置；或者，第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。基于该可能的设计，可以通过多种方式获取终端装置的索引，实现方式灵活多样。
第二十一方面，提供了一种终端装置，该终端装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统。该终端装置可以实现上述各方面或者各可能的设计中第二终端装置所执行的功能，所述功能可以通过硬件实现，如：一种可能的设计中，该终端装置可以包括：处理器和收发器。处理器通过收发器向第一终端装置发送包括M个第一资源单元的侧行数据，根据侧行数据的传输资源，确定可用的PSFCH反馈资源；可用的PSFCH反馈资源包括P个第二资源单元；以及根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数，在用于发送SFCI的频域资源，通过收发器接收第一终端装置重复发送的SFCI；X为发送SFCI需要的第二资源单元的个数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。在又一种可能的设计中，所述终端装置还可以包括存储器，所述存储器，用于保存终端装置必要的计算机执行指令和数据。当该终端装置运行时，处理器执行该存储器存储的该计算机执行指令，以使该终端装置执行如上述第十九方面或者第十九方面的任一种可能的设计所述的SFCI的发送方法。
第二十二方面，提供了一种计算机可读存储介质，该计算机可读存储介质可以为可读的非易失性存储介质，该计算机可读存储介质存储有计算机指令，当其在计算机上运行时，使得计算机可以执行上述第十九方面或者上述方面的任一种可能的设计所述的SFCI的发送方法。
第二十三方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第十九方面或者上述方面的任一种可能的设计所述的SFCI的发送方法。
第二十四方面，提供了一种终端装置，该终端装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统，该终端装置包括一个或者多个处理器以及和一个或多个存储器。所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述一个或多个处理器执行 所述计算机指令时，使得所述终端装置执行如上述第十九方面或者第十九方面的任一可能的设计所述的SFCI的发送方法。
其中，第二十一方面至第二十四方面中任一种设计方式所带来的技术效果可参见上述第十九方面或者第十九方面的任一种可能的设计所带来的技术效果，不再赘述。
第二十五方面，本申请实施例提供一种SFCI的发送系统，该系统包括如第二方面至第六方面任一方面所述的第一终端装置以及如第八方面至第十二方面任一方面所述的第二终端装置；或者，该系统包括如第十四方面至第十八方面任一方面所述的第一终端装置以及如第二十方面至第二十四方面任一方面所述的第二终端装置。
附图说明
图1为本申请实施例提供的一种通信系统的简化示意图；
图2为单播通信场景下发送SFCI的示意图；
图3为本申请实施例提供的一种终端装置的组成示意图；
图4为本申请实施例提供的一种SFCI的发送方法流程图；
图5为本申请实施例提供的多播通信场景下发送SFCI的示意图；
图6a为本申请实施例提供的短格式PSFCH的反馈资源示意图；
图6b为本申请实施例提供的短格式PSFCH的反馈资源又一示意图；
图6c为本申请实施例提供的长格式PSFCH的反馈资源示意图；
图7a为本申请实施例提供的一种获取终端装置的索引的示意图；
图7b为本申请实施例提供的又一种获取终端装置的索引的示意图；
图8为本申请实施例提供的又一种SFCI的发送方法流程图；
图9为本申请实施例提供的多播通信场景下发送SFCI的又一示意图；
图10为本申请实施例提供的一种终端装置110的组成示意图；
图11为本申请实施例提供的一种终端装置120的组成示意图；
图12为本申请实施例提供的一种通信系统的组成示意图。
具体实施方式
下面结合说明书附图对本申请实施例的实施方式进行详细描述。
本申请实施例提供的SFCI的发送方法可用于支持侧行(sidelink)通信的任一通信系统，该通信系统可以为第三代合作伙伴计划(3rd generation partnership project，3GPP)通信系统，例如，长期演进(long term evolution，LTE)系统，又可以为第五代(5th generation，5G)移动通信系统、新空口(new radio，NR)系统、NR-车与任何事物通信(vehicle-to-everything，V2X)系统以及其他下一代通信系统，也可以为非3GPP通信系统，不予限制。下面以图1为例，对本申请实施例提供的方法进行描述。
图1是本申请实施例提供的一种通信系统的示意图，如图1所示，该通信系统可以包括多个终端装置以及网络设备。终端装置可以位于网络设备的小区覆盖范围内，也可以位于网络设备的小区覆盖范围外。终端装置可以通过Uu口与网络设备相互通信，也可以通过侧行链路(sidelink，SL)(或者PC5口)与其他终端装置进行侧行通信。终端装置可以通过单播方式与其他终端装置一对一通信，也可以通过多播方式(或称为组播方式)与其他多个终端装置进行组播通信。例如，如图1所示，终端装置1可以与终端装置2进行单播通信，通过单播方式向终端装置2发送侧行数据。终端装置1可以与其他 三个终端装置(终端装置3、终端装置4、终端装置5)为一个组播组，终端装置1可以通过组播方式向终端装置3、终端装置4、终端装置5发送侧行数据。
其中，图1中的网络设备可以是任意一种具有无线收发功能的设备，主要用于实现无线物理控制功能、资源调度和无线资源管理、无线接入控制以及移动性管理等功能。具体的，该网络设备可以为接入网(access network，AN)/无线接入网(radio access network，RAN)设备，还可以为由多个5G-AN/5G-RAN节点组成的设备，又可以为基站(nodeB，NB)、演进型基站(evolution nodeB，eNB)、下一代基站(generation nodeB，gNB)、收发点(transmission receive point，TRP)、传输点(transmission point，TP)、路边单元(road side unit，RSU)以及某种其它接入节点中的任一节点等，不予限制。
图1中的终端装置(terminal equipment)可以称为终端(terminal)或者用户设备(user equipment，UE)或者移动台(mobile station，MS)或者移动终端(mobile terminal，MT)等。具体的，图1中的终端装置可以是手机(mobile phone)、平板电脑或带无线收发功能的电脑。终端还可以是虚拟现实(virtual reality，VR)终端、增强现实(augmented reality，AR)终端、工业控制中的无线终端、无人驾驶中的无线终端、远程医疗中的无线终端、智能电网中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、车载终端、具有车对车(vehicle-to-vehicle，V2V)通信能力的车辆、智能网联车等等，不予限制。本申请实施例的终端装置以及网络装置都可以为一个或多个芯片，也可以为片上系统(System on Chip，SOC)等。
需要说明的是，图1仅为示例性附图，图1包括的设备的数量不受限制，且除图1所示设备之外，该通信架构还可以包括其他设备。此外，图1中各个设备的名称不受限制，除图1所示名称之外，各个设备还可以命名为其他名称，不予限制。
在图1所示通信系统中，终端装置可以采用下述任一模式获取传输资源：一、网络设备配置或调度模式(在LTE-V2X中或者称为LTE-V2X mode3，在NR-V2X中或者称为NR-V2X mode1)。二、终端装置自己调度模式(在LTE-V2X中或者称为LTE-V2X mode4，在NR-V2X中或者称为NR-V2X mode2)，可以是网络设备为终端装置分配包括大量资源的资源池，或者终端装置预配置有包括大量资源的资源池，多个终端装置可以通过自己感知调度或竞争的方式在该资源池中选择自身所需要的传输资源。终端装置获取到传输资源后，可以在获取到的传输资源上通过物理侧行共享信道(physical sidelink shared channel，PSSCH)向接收端发送侧行数据。
为提高数据传输的可靠性，接收端接收到侧行数据后，可以向发送端发送侧行反馈控制信息(sidelink feedback control information，SFCI)，SFCI至少可以包括接收端向发送端反馈是否成功接收侧行数据的确定信息，还可以包括资源信道状态信息(channel state information，CSI)和/或接收端测量的辅助信息(receiver UE measured assistance information，RMAI)，发送端接收到接收端反馈的SFCI后，可以根据接收端反馈的SFCI新传数据或者重传数据，以此提高数据传输的可靠性。
以终端装置通过单播方式向对端发送侧行数据为例，接收端通过PSSCH接收到发送端发送的侧行数据后，接收端可以在可用的PSFCH反馈资源向发送端发送SFCI，此时，可用的PSFCH反馈资源全部用于接收端反馈SFCI，若可用的PSFCH反馈资源大于发送一次SFCI所需的资源，则接收端可以在可用的PSFCH反馈资源向发送端重复发送SFCI， 以提高SFCI的传输可靠性。例如，如图2所示，与PSSCH对应的可用的PSFCH反馈资源为2个子信道，每个子信道包括4个物理资源块(physical resource block，PRB)，若接收端向发送端反馈一次SFCI需要1个PRB，则发送端可以将SFCI在可用的PSFCH反馈资源上经过8次重复后发送给接收端。或者，若反馈一次SFCI需要1个子信道，则发送端可以在可用的PSFCH反馈资源上将SFCI经过2次重复后发送给发送端。
由上可知，单播通信时，接收端可以在确定的PFSCH反馈资源上发送一次SFCI或者重复多次发送SFCI，发送端可以在可用的PSFCH反馈资源上接收并解析发送端发送的SFCI。然而，当终端装置通过多播方式向多个接收端发送侧行数据时，多个接收端共用可用的PSFCH反馈资源向接收端反馈SFCI，此时，每个接收端需要进一步确定可用的PSFCH反馈资源用于自身发送SFCI的频域资源。
为解决多播通信下，接收端采用可用的PSFCH的反馈资源中的哪些频域资源向发送端发送SFCI的问题，本申请实施例提供了一种SFCI发送方法，在该方法中，接收端根据侧行数据的传输资源确定可用的PSFCH反馈资源后，接收端根据自身在组播组中的索引、发送一次SFCI所需的资源单元的大小X以及X个资源单元内可复用的正交码序列的个数等，确定SFCI在可用的PSFCH反馈资源中所占用的频域资源，在确定的频域资源上向发送端发送SFCI，如此，可以使该接收端与其他多个接收端采用码分复用的方式向发送端反馈SFCI。具体的，该实现方式可参照图4所示方法对应的实施例中所述。
具体实现时，图1所示各终端装置均可以采用图3所示的组成结构，或者包括图3所示的部件。图3为本申请实施例提供的一种终端装置300的组成示意图，该终端装置300可以为终端装置或者终端装置中的芯片或者片上系统。如图3所示，该终端装置300包括处理器301，收发器302以及通信线路303。
进一步的，该终端装置300还可以包括存储器304。其中，处理器301，存储器304以及收发器302之间可以通过通信线路303连接。
其中，处理器301是中央处理器(central processing unit，CPU)、通用处理器网络处理器(network processor，NP)、数字信号处理器(digital signal processing，DSP)、微处理器、微控制器、可编程逻辑器件(programmable logic device，PLD)或它们的任意组合。处理器301还可以是其它具有处理功能的装置，例如电路、器件或软件模块，不做限制。
收发器302，用于与其他设备或其它通信网络进行通信。该其它通信网络可以为以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。收发器302可以是模块、电路、收发器或者任何能够实现通信的装置。
通信线路303，用于在终端装置300所包括的各部件之间传送信息。
存储器304，用于存储指令。其中，指令可以是计算机程序。
其中，存储器304可以是只读存储器(read-only memory，ROM)或可存储静态信息和/或指令的其他类型的静态存储设备，也可以是随机存取存储器(random access memory，RAM)或可存储信息和/或指令的其他类型的动态存储设备，还可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或其他磁存储设备等，不予限制。
需要指出的是，存储器304可以独立于处理器301存在，也可以和处理器301集成在 一起。存储器304可以用于存储指令或者程序代码或者一些数据等。存储器304可以位于终端装置300内，也可以位于终端装置300外，不做限制。
处理器301，用于执行存储器304中存储的指令，以实现本申请下述实施例提供的SFCI的发送方法。
在一种示例中，处理器301可以包括一个或多个CPU，例如图3中的CPU0和CPU1。
作为一种可选的实现方式，终端装置300包括多个处理器，例如，除图3中的处理器301之外，还可以包括处理器307。
作为一种可选的实现方式，终端装置300还包括输出设备305和输入设备306。示例性地，输入设备306是键盘、鼠标、麦克风或操作杆等设备，输出设备305是显示屏、扬声器(speaker)等设备。
需要指出的是，终端装置300可以是台式机、便携式电脑、网络服务器、移动手机、平板电脑、无线终端、嵌入式设备、芯片系统或有图3中类似结构的设备。此外，图3中示出的组成结构并不构成对该终端装置的限定，除图3所示部件之外，该终端装置可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
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。
此外，本申请的各实施例之间涉及的动作、术语等均可以相互参考，不予限制。本申请的实施例中各个设备之间交互的消息名称或消息中的参数名称等只是一个示例，具体实现中也可以采用其他的名称，不予限制。
下面以图1所示的架构为例，对本申请实施例提供的SFCI的发送方法进行描述。其中，下述实施例所述的终端装置可以具备图3所示部件。
图4为本申请实施例提供的一种SFCI的发送方法，如图4所示，该方法可以包括：
步骤401：第二终端装置向第一终端装置发送侧行数据。
其中，第二终端装置可以称为发送终端或者发送UE，第一终端装置可以称为接收终端或者接收UE。第一终端装置、第二终端装置以及其他终端装置(如：第三终端装置等)位于同一组播组，第一终端装置可以为组播组中的任一接收成员(如：为接收第二终端装置发送的侧行数据的任一终端装置)，该组播组可以为一个车队，除第一终端装置、第二终端装置、第三终端装置之外，该组播组中还可以包括其他一个或者多个终端装置，此其他终端装置可以为一个或多个其他终端装置。
以图1为例，第二终端装置可以为图1中的终端装置1，第一终端装置可以为图1中的终端装置3，第三终端装置可以为图1中的终端装置4，终端装置1、终端装置3、终端装置4位于同一组播组，该组播组还包括图1中的终端装置5等。
其中，第二终端装置可以采用组播方式，向第一终端装置、第三终端装置以及组播组中的其他接收成员发送侧行数据。示例性的，第二终端装置可以在侧行数据的传输资源上，通过物理侧行共享信道(physical sidelink shared channel，PSSCH)向第一终端装置、第三终端装置以及组播组中的其他接收成员发送侧行数据。或者，可以描述为第二终端装置将侧行数据承载在PSSCH，采用组播方式在侧行数据的传输资源上向第一终端装置、第三终端装置以及组播组中的其他接收成员发送PSSCH。
其中，侧行数据的传输资源可以包括M个第一资源单元，M为正整数。本申请实施例中，第一资源单元可以指子信道(sub-channel)或者物理资源块(physical resource block， PRB)或者其他划分粒度的资源，不予限制。进一步可选的，侧行数据的传输资源还包括时域资源，该时域资源的长度不受限制，可以为一个或者多个时隙(slot)，一个或多个微时隙(mini slot)，也可以为一个时隙中的多个连续符号(symbol)或者多个时隙中的多个连续符号等，不予限制。例如，侧行数据在频域上占用1个子信道，在时域上占用slot1内的第0个符号～第12个符号。
其中，一个子信道可以包括多个PRB。例如，一个子信道可以包括4个PRB。
示例性的，侧行数据的传输资源可以由网络设备配置或调度给第二终端装置，也可以由第二终端装置自主选择，不予限制。此外，侧行数据的传输资源可以通过承载在PSCCH上的侧行控制信息(sidelink control information，SCI)通知给组播组中的接收成员，如：第一终端装置、第三终端装置，以便组播组中的接收成员可以在侧行数据的传输资源上接收侧行数据，提高侧行数据接收的准确性。
步骤402：第一终端装置从第二终端装置接收侧行数据。
示例性的，第一终端装置可以在侧行数据的传输资源上，通过PSSCH接收侧行数据，或者，可以描述为第一终端装置在侧行数据的传输资源上，接收承载有侧行数据的PSSCH。
步骤403：第一终端装置根据侧行数据的传输资源确定可用的PSFCH反馈资源。
其中，可用的PSFCH反馈资源还可以描述为可以用来发送SFCI的PSFHC反馈资源。PSFCH反馈资源可以是周期性配置的，示例性的，PSFCH反馈资源的配置周期可以设置为N个时隙，N为大于或者等于1的整数，即每N个时隙配置一个PSFCH反馈资源。
其中，PSFCH反馈资源可以用于传输侧行反馈控制信息(sidelink feedback control information，SFCI)。PSFCH反馈资源可以包括P个第二资源单元。第二资源单元可以指子信道或者物理资源块或者其他划分粒度的资源，不予限制。示例性的，第二资源单元的粒度可以小于或等于第一资源单元的粒度。例如，第一资源单元为子信道，第二资源单元为PRB；或者，第一资源单元、第二资源单元均为子信道；或者，第一资源单元、第二资源单元均为PRB等，不予限制。
其中，根据PSFCH占用的符号长度，PSFCH可以分为长格式(long-format)的PSFCH、短格式(short-format)的PSFCH。长格式的PSFCH可以占用一个时隙中所有可用符号，如：占用一个时隙中的全部符号或者占用一个时隙中的13个符号等。短格式的PSFCH可以占用一个时隙中的1～2个符号。如：可以占用一个时隙中的最后1～2个可用符号等。
其中，PSFCH反馈资源的频域位置与侧行数据的传输资源的频域位置间具有对应关系。PSFCH反馈资源的频域起始位置与侧行数据的传输资源的频域起始位置可以相同或者不同。可用的PSFCH反馈资源的时域位置与侧行数据的传输资源的时域位置可以相同，也可以不同。具体的，PSFCH反馈资源的几种可能设计可参照下面图4所示方法的第一个场景中所述。
步骤404：第一终端装置根据可用的PSFCH反馈资源、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源。
其中，X为第一终端装置向第二终端装置发送一次SFCI需要的第二资源单元的个数，X可以为大于或者等于1的整数。示例性的，发送一次SFCI可以需要一个子信道或者一个PRB，不予限制。
其中，SFCI为与第一终端装置从第二终端装置接收到的侧行数据对应的反馈信息。 SFCI可以用于至少指示第一终端装置是否正确接收第二终端装置发送的侧行数据，SFCI至少可以包括确认应答(acknowledgement，ACK)/否定应答(negative acknowledgement，NACK)，ACK用于指示侧行数据译码成功，NACK用于指示侧行数据译码失败；或者，SFCI可以用于指示第一终端装置正确接收第二终端装置发送的侧行数据，SFCI至少可以包括ACK；或者，SFCI可以用于指示第一终端装置未正确接收第二终端装置发送的侧行数据，SFCI至少可以包括NACK。除此之外，SFCI还可以包括其他辅助信息，如：SFCI还可以包括CSI、RMAI等，不予限制。
其中，用于发送SFCI的频域资源可以包括可用的PSFCH反馈资源内用于发送SFCI的频域资源的频域起始位置以及频域带宽。本申请实施例中，第一终端装置可以在可用的PSFCH反馈资源的连续频域资源单元上发送一次或者多次SFCI，用于发送SFCI的频域资源的频域带宽等于发送一次SFCI所需的频域带宽与第一终端装置在可用的PSFCH反馈资源上发送的SFCI的次数的乘积，其中发送一次SFCI所需的频域带宽为X个第二资源单元。
示例性的，以第一终端装置向第二终端装置发送一个SFCI为例，第一终端装置根据可用的PSFCH反馈资源、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定可用的PSFCH反馈资源内用于发送SFCI的频域资源可以包括：
第一终端装置根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码序列的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；
第一终端装置根据第一终端装置的索引U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置，用于发送SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第
Figure PCTCN2019101155-appb-000023
个第二资源单元，用于发送SFCI的频域资源的频域起始位置与可用的PSFCH反馈资源的频域起始位置间隔
Figure PCTCN2019101155-appb-000024
个第二资源单元，即将可用的PSFCH反馈资源的频域起始位置偏移
Figure PCTCN2019101155-appb-000025
个第二资源单元后的首个第二资源单元作为用于发送SFCI的频域资源的频域起始位置，用于发送SFCI的频域资源的频域带宽为X个第二资源单元。
需要说明的是，本申请实施例中，可用的PSFCH反馈资源包括的P个第二资源单元可以从PSFCH反馈资源的频域起始位置开始排序为：第一个第二资源单元、第二个第二资源单元，以此类推，直至第P个第二资源单元。
其中，X个第二资源单元内可复用的正交码序列的个数还可以描述为在X个第二资源单元内最多可以传输的正交码序列的个数。一个正交码序列的长度为X个第二资源单元。具体的，设计长度为X个第二资源单元的正交码序列不予限制。
本申请实施例所述的X个第二资源单元为用于发送与第二终端装置向第一终端装置组播的侧行数据对应的SFCI的资源单元。X个第二资源单元内可复用的正交码序列的个数具体可以指用于反馈与步骤401所述的侧行数据对应的SFCI的X个第二资源单元内可复用的正交码序列的个数。
需要说明的是，在PSFCH反馈资源的配置周期为N个时隙的情况下，若N个时隙上均发送有侧行数据，且这N个时隙上的侧行数据对应的SFCI需要共用同一X个第二资源单元，即X个第二资源单元上除发送与步骤401所述的侧行数据对应的SFCI之外，还需要发送与其他N-1个时隙上的侧行数据对应的SFCI，则用于反馈与步骤401所述的侧行数据对应的SFCI的X个第二资源单元内可复用的正交码序列的个数为
Figure PCTCN2019101155-appb-000026
如果n/N 除不尽，则L个正交码序列中最后正交码序列丢弃不用，以保证n/N除尽；同样的，如果发送SFCI需要的正交码序列的个数为偶数，而L为奇数，则L个正交码序列中的最后一个码序列丢弃不用，即L＝L-1。
其中，n为预先配置的X个第二资源单元内可复用的正交码序列的个数。示例性的，可以根据PSFCH的格式预先配置X个第二资源单元内可复用的正交码序列的个数n。例如，短格式PSFCH时，一个PRB或者12个资源单元(resource element，RE)上可复用12个正交码序列；10个PRB或者120个RE上可复用54个正交码序列；长格式PSFCH时，1个PRB或者12个RE上可复用72个正交码序列。
例如，假设预先配置1个子信道上可复用的正交码序列为12个，PSFCH反馈资源的配置周期为2个时隙，时隙1、时隙2上发送有侧行数据，每个时隙上的侧行数据发往不同的组播组，根据时隙1上的侧行数据的传输资源确定的可用的PSFCH反馈资源与根据时隙2上的侧行数据的传输资源确定的可用的PSFCH反馈资源相同。若反馈时隙1上的侧行数据对应的SFCI需要一个子信道，反馈时隙2上的侧行数据对应的SFCI需要一个子信道，则时隙1上的侧行数据对应的SFCI可以使用12个正交码序列中的6个正交码序列，时隙2上的侧行数据对应的SFCI可以使用12个正交码序列中的其他6个正交码序列。
其中，发送SFCI需要的正交码序列的个数可以根据SFCI携带的信息而定，发送SFCI需要的正交码序列的个数可以为一个或者两个或者三个，不予限制。以SFCI为ACK或者NACK为例，发送SFCI需要的正交码序列的个数为2个，其中一个正交码序列用于指示ACK，另一个正交码序列用于指示NACK。
示例性的，发送SFCI需要的正交码序列的个数为2个，发送SFCI需要的正交码序列分别为L个正交码序列中索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的两个正交码序列。
其中，可在X个第二资源单元内传输SFCI的终端装置的个数K还可以描述为在X个第二资源单元内最大可复用的终端装置的个数K，换言之，最多可支持K个终端装置的SFCI复用在X个第二资源单元上。以X个第二资源单元内可复用的正交码序列的个数为L，发送SFCI需要的正交码序列的个数为Num为例，可在X个第二资源单元内传输SFCI的终端装置的个数为
Figure PCTCN2019101155-appb-000027
其中，
Figure PCTCN2019101155-appb-000028
表示向下取整。如：若
Figure PCTCN2019101155-appb-000029
则
Figure PCTCN2019101155-appb-000030
其中，第一终端装置的索引U index可以用于唯一标识组播组中的第一终端装置。第一终端装置的索引U index还可以描述为第一终端装置的编号。具体的，第一终端装置的索引U index的确定方法可参照图4所示方法的第二个场景中所述。
例如，如图1所示，组播组包括终端装置1、终端装置3、终端装置4以及终端装置5，终端装置1的索引可以为0、终端装置3的索引可以为1，以此类推，终端装置4的索引为2、终端装置5的索引为3。
又例如，假设组播组包括终端装置1、终端装置3、终端装置4、终端装置5、终端装置6、终端装置7，终端装置1的索引为0、终端装置3的索引为1，以此类推，终端装置4的索引为2、终端装置5的索引为3、终端装置6的索引为4、终端装置的索引为5。
步骤405：第一终端装置根据用于发送SFCI的频域资源，向第二终端装置发送SFCI。
示例性的，第一终端装置可以在以可用的PSFCH反馈资源的第
Figure PCTCN2019101155-appb-000031
个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH向第二终端装置发送SFCI。
以SFCI包括ACK或者NACK为例，当第一终端装置成功译码接收到侧行数据时，第一终端装置可以在以第
Figure PCTCN2019101155-appb-000032
个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH向第二终端装置发送索引为mod(2×UE index，L)的正交码序列；
当第一终端装置译码侧行数据失败时，第一终端装置可以在以第
Figure PCTCN2019101155-appb-000033
个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH向第二终端装置发送索引为mod(2×UE index+1，L)的正交码序列。
需要说明的是，本申请实施例不限于发送ACK时使用索引为mod(2×UE index，L)的正交码序列，发送NACK时使用索引为mod(2×UE index+1，L)的正交码序列，还可以发送ACK时使用索引为mod(2×UE index+1，L)的正交码序列，发送NACK时使用索引为mod(2×UE index，L)的正交码序列。
例如，如图5所示，以SFCI为ACK/NACK反馈，发送一次SFCI需要一个子信道为例，假设PSFCH反馈资源的配置周期N＝2，预先配置的一个子信道内可复用的正交码序列的个数为n＝12，则发送每个时隙上的侧行数据对应的SFCI所需一个子信道内可复用的正交码序列的个数为
Figure PCTCN2019101155-appb-000034
即一个子信道内可复用的终端装置的个数为3个，在第一个时隙发送的侧行数据对应的SFCI可以使用前6个正交码序列，第二个时隙发送的侧行数据对应的SFCI可以使用后6个正交码序列，针对每个时隙发送的侧行数据最多可以支持3个UE的SFCI复用在一个子信道对应的PSFCH频域资源上。
如果一个组播通信中有7个UE，其中1个发送UE，6个接收UE，发送UE可以向接收UE组播侧行数据，6个接收UE的索引分别为0，1，2，…，5，则需要2个子信道才能支持所有6个接收UE进行ACK/NACK反馈。如果根据发送UE组播的侧行数据的传输资源确定的可用的PSFCH反馈资源包括5个子信道，此时，通过公式
Figure PCTCN2019101155-appb-000035
可以确定：用于发送索引为0，1，2的接收UE的SFCI的频域资源的频域起始位置与PSFCH反馈资源的频域起始位置间的偏移值为0，用于发送索引为0，1，2的接收UE的SFCI的频域资源的频域起始位置为子信道1，用于发送索引为0，1，2的接收UE的SFCI的频域资源的频域带宽为一个子信道；用于发送索引为3，4，5的接收UE的SFCI的频域资源的频域起始位置与PSFCH反馈资源的频域起始位置间的偏移值为1，用于发送索引为3，4，5的接收UE的SFCI的频域资源的频域起始位置为子信道2，索引为3，4，5的接收UE占用一个子信道向接收UE发送SFCI。
其中，根据公式mod(2×UE index，L)以及mod(2×UE index+1，L)可以确定索引为0的接收UE可以使用索引为0和1的正交码序列表示ACK和NACK，索引为1的接收UE可以使用索引为2和3的正交码序列表示ACK和NACK，索引为2的接收UE可以使用索引为4和5的正交码序列表示ACK和NACK。索引为3的接收UE可以使用索引为0和1的正交码序列表示ACK和NACK，索引为4的接收UE可以使用索引为2和3的正交码序列表示ACK和NACK，索引为5的接收UE可以使用索引为4和5的正交码序列表示ACK和NACK。
需要说明的是，本申请不限定终端装置的起始索引，本申请实施例仅以终端装置的起始索引为0进行描述，可替换的，终端装置的起始索引还可以为1或者其他数值，正交码 序列的起始索引还可以为1或者其他数值，不予限制。当终端装置的起始索引为大于0的其他整数，仍可以采用上述方案确定第一终端装置向第二终端装置发送的SFCI的频域资源的频域起始位置、发送SFCI使用的正交码序列。
步骤406：第二终端装置在用于发送SFCI的频域资源上，接收来自第一终端装置的SFCI。
其中，第二终端装置可以参照步骤403确定可用的PSFCH反馈资源，再根据步骤404所述过程，确定可用的PSFCH反馈资源上用于发送SFCI的频域资源的频域起始位置和频域带宽X、以及第一终端装置发送SFCI所使用的正交码序列；在以用于发送SFCI的频域资源的频域起始位置为起始的X个第二资源单元上，通过一个PSFCH接收来自第一终端装置的正交码序列，接收到正交码序列用于指示第一终端装置向第二终端装置反馈的SFCI。
需要说明的是，图4所示步骤402～步骤406以组播组中的第一终端装置向第二终端装置反馈SFCI为例，对本申请实施例提供的SFCI的发送方法进行了介绍。可理解的是，该组播组中的其他接收成员，如：第三终端装置、第四终端装置等也可参照图4所示步骤向第二终端装置发送SFCI，对应的，第二终端装置也可以采用步骤406所述方式接收组播组内的其他成员反馈的SFCI，不予赘述。
此外，图4所示方法以多个终端装置设备采用码分复用(code division multiplexing，CDM)方式，将用于指示SFCI的多个正交码序列复用在一起反馈给发送终端为例，对本申请实施例提供的SFCI发送方法进行描述。参照图4所示的发送SFCI的原理，可替换的，组播组内的多个接收终端还可以采用其他复用方式向发送终端反馈SFCI，如：可以采用频分复用或者时分复用或者时频复用或者频分+码分复用或者时分+码分复用或者时频复用+码分复用的方式向发送终端反馈SFCI，不予限制。
进一步的，为了提高PSFCH反馈资源的利用率，若组播组中的所有接收成员采用图4所示方法向发送终端反馈一次SFCI后，PSFCH反馈资源上还有剩余资源，则组播组中的接收成员还可以将自身的其他辅助信息，如：CSI和/或RMAI，在剩余的资源上采用码分复用方式反馈给发送终端，以此提高PSFCH反馈资源的利用率。例如，如图5所示，可以在PSFCH反馈资源的子信道3上发送索引为0，1，2的接收UE的CSI，在PSFCH反馈资源的子信道4上发送索引为3，4，5的接收UE的CSI，在PSFCH反馈资源的子信道5上发送全部接收UE的RMAI。
基于图4所示方法，组播组中的接收终端根据接收到的侧行数据的传输资源确定可用的PSFCH反馈资源后，接收终端通过终端装置的索引、发送一次SFCI需要的资源单元的大小以及可用正交码序列等信息，确定接收终端向发送终端发送的SFCI在可用的PSFCH反馈资源的频域起始位置和频域带宽、以及发送SFCI使用的正交码序列，实现组播通信中多个接收终端对PSSCH传输的SFCI反馈，尤其是ACK/NACK反馈，解决现有无法为组播通信场景下各接收终端反馈的SFCI确定频域资源的问题。
在图4所示方法的第一个场景中，PSFCH反馈资源的设计格式可以有如下几种：
格式一、PSFCH为短格式的PSFCH，用于发送SFCI的PSFCH反馈资源的频域起始位置与侧行数据的传输资源的频域起始位置相同，用于发送SFCI的PSFCH反馈资源的频域带宽小于侧行数据的传输资源的频域带宽。
示例性的，若PSFCH反馈资源的配置周期N，PSFCH反馈资源的频域带宽为子信道 带宽的N分之一。如：若子信道的频域带宽为4个PRB，N为2，则PSFCH反馈资源的频域带宽为4/2＝2个PRB。PSFCH反馈资源的频域起始位置根据携带侧行数据的PSSCH的频域起始位置和携带侧行数据的PSSCH所处的时隙位置确定。
如图6a所示，在时隙1和时隙2发送的PSSCH对应的SFCI在时隙3的PSFCH反馈资源上反馈，时隙1对应N＝2个时隙中的第一个时隙，时隙2对应N＝2的时隙中的第2个时隙。如图6a所示，如果在时隙1发送的PSSCH的频域起始位置为子信道2，则对应的PSFCH反馈资源的频域起始位置为子信道2，由于在时隙1发送，因此对应该PSSCH的SFCI可以使用PSFCH反馈资源中的前2个PRB。在时隙2发送的PSSCH的频域起始位置为子信道2，则对应的PSFCH反馈资源的频域起始位置也为子信道2，由于在时隙2发送，因此对应该PSSCH的SFCI可以使用PSFCH的频域资源中的后2个PRB。其中，图6a以时隙顺序对SFCI所使用的PSFCH反馈资源中的资源单元进行排列，也可以频率优先对SFCI所使用的PSFCH反馈资源中的资源单元排列，本申请实施例不做限制。
格式二、PSFCH为短格式的PSFCH，PSFCH反馈资源的频域起始位置与侧行数据的传输资源的频域起始位置相同，PSFCH反馈资源的频域带宽等于侧行数据的传输资源的频域带宽。
如图6b所示，携带侧行数据的PSSCH占用2个子信道的频域带宽，则可用的PSFCH反馈资源的频域带宽也为2个子信道。若在同一PSFCH反馈资源上支持N个时隙的PSSCH对应的SFCI的发送，则可以采用码分复用方式传输N个时隙的PSSCH对应的SFCI。如图6b所示，N＝2，时隙1上的PSSCH对应一组正交码序列，该组正交码序列可以用于指示时隙1上的PSSCH对应的SFCI；时隙2上的PSSCH可以对应另一组正交码序列，该组正交码序列可以用于指示时隙2上的PSSCH对应的SFCI。两组正交码序列可以复用在时隙3的PSFCH反馈资源上传输。
格式三、PSFCH为长格式的PSFCH，PSFCH反馈资源的频域起始位置与侧行数据的传输资源的频域起始位置不同，PSFCH反馈资源的频域起始位置与侧行数据的传输资源的频域起始位置存在对应关系，PSFCH反馈资源的频域带宽小于侧行数据的传输资源的频域带宽，PSFCH反馈资源包括的第二资源单元的个数等于侧行数据的传输资源包括的第一资源单元的个数的X倍。
以携带侧行数据的PSSCH的频域带宽为1个子信道，PSFCH的最小频域带宽为2个PRB为例说明，PSFCH的频域起始位置为PSSCH的频域起始位置数目的2倍，PSFCH的频域带宽为PSSCH所占子信道数目的2倍，如：一个UE的PSSCH的频域起始位置为子信道1，占用2个子信道，则与该PSSCH对应的PSFCH的频域起始位置PRB 2，PSFCH的频域带宽为4个PRB。
例如，如图6c所示，配置一个侧行资源池有20MHz，子载波间隔为15K，共有100个可用PRB，如果配置一个子信道包括10个PRB，同时PSFCH包括在该20MHz的侧行资源池内，则该侧行资源池中包括8个子信道用于PSSCH传输，16个PRB用于PSFCH传输，与PSSCH对应。如图6c所示，侧行资源池的起始(starting)PRB为1，长度为100，用于PSSCH传输的starting PRB为1，长度为80，子信道尺寸为10，则PRB1～10对应子信道1，PRB11～20对应子信道2，以此类推至子信道8。用于PSFCH传输的starting PRB为85，长度为16，分别对应子信道1～8。如图6c所示，相对用于PSFCH传输的starting  PRB85，子信道1的PSSCH对应的PSFCH偏移为0，即子信道1的PSSCH对应的PSFCH的频域起始位置为索引为85的PRB；子信道2的PSSCH对应的PSFCH偏移为2，即子信道1的PSSCH对应的PSFCH的频域起始位置为索引为87的PRB，以此类推，子信道8的PSSCH对应PSFCH的偏移14，即子信道8的PSSCH对应的PSFCH的频域起始位置为索引为99的PRB。在图6c中，如果UE2的PSSCH占用2个子信道且子信道起始位置为2，即UE2占用子信道2～3，则相对用于PSFCH传输的starting PRB85，子信道2～3上的PSSCH对应的PSFCH的起始频域位置偏移2PRB，即UE2的PSFCH占用索引为87～90的4个PRB。
在图3所示方法的第二个场景中，可以通过下述三种方式中的任一种方式确定第一终端装置的索引U index：
方式一、第一终端装置的索引U index预先配置。
示例性的，可以在组建组播组时，为该组播组中的各个终端装置配置其对应的索引，进一步可选的，将配置的索引预先存储在终端装置中。
方式二、第一终端装置的索引U index由第二终端装置通知给第一终端装置。
进一步的，方式二中，第二终端装置还可以将组播组中接收成员的个数通知给第一终端，以及将其他信息通知给第一终端装置，不予限制。
示例性的，方式二的具体实现过程可参照图7a所示。图7a为本申请实施例提供的一种获取终端装置的索引的示意图，如图7a所示，该过程可以包括：
第一终端装置向第二终端装置发送加入组播组的请求，以请求加入第二终端装置所在的组播组；第二终端装置接收第一终端装置发送的加入组播组的请求，并在确定第一终端装置加入该组播组后，为第一终端装置配置索引，并向第一终端装置发送第一终端装置的索引以及成功加入该组播组的接收成员的个数。
后续，当其他新的成员(如：第三终端装置)加入该组播组时，第二终端装置在确定第三终端装置加入该组播组后，为第三终端装置配置索引，并更新加入该组播组的接收成员的个数，如：将加入该组播组的接收成员的个数加1，并向第三终端装置发送第三终端装置的索引以及更新后的组播组的接收成员的个数。进一步可选的，当有新成员加入后，第二终端装置还向第一终端装置发送更新后的组播组的接收成员的个数。
需要说明的是，本申请实施例中，组播组中至少有一个发送终端，如本申请实施例所述的第二终端装置，该组播组中除发送终端之外的其他成员可以称为接收UE或接收成员。
其中，在方式二中，第二终端装置可以通过PC5接口的无线资源控制(PC5-radio resource control,RRC)信令向各个加入组播组的成员发送成员的索引以及组播组中接收成员的个数。
其中，本申请实施例中，第二终端装置可以称为组头，组头可以为自己分配索引0，为第一个加入组播组的终端装置分配索引1，第二个加入组播组的终端装置分配索引2，以此类推。例如，如果组播组中包括组头在内的组员数为5，则这5个成员的索引分别为0，1，2，3，4。
进一步的，如果组播组中有组员离开，第二终端装置可以重新分配各个接收成员的索引以及更新组播组中接收成员的个数。
示例性的，如图7a所示，第一终端装置向第二终端装置发送离开组播组的请求，以请求离开组播组；第二终端装置接收第一终端装置发送的离开组播组的请求，确定第一终端 装置离开该组播组后，释放第一终端装置的索引。
进一步可选的，第二终端装置重新为组播组中存在的接收成员分配索引，以使得组播组中的接收成员的索引为连续编号，同时，更新接收成员的个数，如：将接收成员的个数减1，并将更新后的第三终端装置的索引和接收成员的个数发送给第三终端装置。
方式三、第一终端装置的索引U index是根据组播组中的接收成员发送的SFCI而确定的。
示例性的，方式三的具体实现过程可参照图7b所示。图7b为本申请实施例提供的一种获取终端装置的索引的示意图，如图7b所示，该过程可以包括：
第一终端装置接收向第二终端装置向发送加入组播组的请求，以请求加入第二终端装置所在的组播组；第二终端装置接收第一终端装置发送的加入组播组的请求，并在确定第一终端装置加入该组播组后，为第一终端装置配置索引，如：当第一终端装置为首个加入组播组的接收成员时，配置第一终端装置的索引为1，同时，第二终端装置向第一终端装置组播侧行数据，第一终端装置接收到侧行数据后，参照步骤403所述，确定可用的PSFCH反馈资源，检测并译码PSFCH反馈资源上其他接收成员反馈的SFCI，若未检测到任何接收成员反馈的SFCI，则第一终端装置确定自身的索引为1，后续，第一终端装置可以采用索引1执行步骤404，确定用于发送SFCI的频域资源，并在确定的用于发送SFCI的频域资源上向第二终端装置发送SFCI。
后续，组播通信时，当有新的成员加入该组播组时，新加入的UE接收并译码第二终端装置组播的侧行数据，参照步骤403所述，确定可用的PSFCH反馈资源，检测并译码PSFCH反馈资源上其他接收成员反馈的SFCI，获得现有组播组内其他发送成员的索引，选择未使用的索引中第一个可用的索引，并在接下来的组播通信中使用选择的索引，确定用于发送SFCI的频域资源和码域资源(如：发送SFCI所使用的正交码序列)，根据确定的用于发送SFCI的频域资源和码域资源向第二终端装置反馈SFCI。
示例性的，以第二终端装置为组头，如图7b所示，当第二个组员(如：第三终端装置)加入组播组时，组头根据已有的1个组员的索引确定该新加入的第三终端装置的索引为2。第二终端装置向组播组中的第一终端装置、第三终端装置发送侧行数据，第一终端装置接收侧行数据，并参照图4所示方法向第二终端装置反馈SFCI。第三终端装置接收第二终端装置组播的侧行数据并参照步骤403所述，确定可用的PSFCH反馈资源，检测并译码PSFCH反馈资源上其他接收成员反馈的SFCI，获得现有组播组内其他发送成员的索引，如：发现索引1已被第一终端装置占用，则第三终端装置选择未使用的索引中第一个可用的索引为2作为自身的索引。在第三终端装置和第二终端装置的下一次组播通信时，第三终端装置可参照步骤404，根据索引2以及其他信息确定用于发送SFCI的频域资源和码域资源，根据确定的用于发送SFCI的频域资源和码域资源向第二终端装置反馈SFCI。
进一步的，如图7b所示，当第三个组员(第四终端装置)加入组播组时，组头根据已有的2个组员的索引确定该新加入的第四终端装置的索引为3。第二终端装置向组播组中的第一终端装置、第三终端装置、第四终端装置发送侧行数据，第一终端装置、第三终端装置接收侧行数据，并参照图4所示方法向第二终端装置反馈SFCI。第四终端装置接收第二终端装置组播的侧行数据，并参照步骤403所述，确定可用的PSFCH反馈资源，检测并译码PSFCH反馈资源上其他接收成员反馈的SFCI，获得现有组播组内其他发送成员的索引，如：发现索引1、索引2已被第一终端装置占用，则第四终端装置选择未使用的索 引中第一个可用的索引为3作为自身的索引。在第四终端装置和第二终端装置的下一次组播通信时，第四终端装置可参照步骤404，根据索引3以及其他信息确定用于发送SFCI的频域资源和码域资源，根据确定的用于发送SFCI的频域资源和码域资源向第二终端装置反馈SFCI。
需要说明的是，新加入成员(如：第四终端装置)与第二终端装置的第一次组播通信中，由于第四终端装置还没有获得索引用于确定反馈资源，此时组头没有收到第四终端装置的反馈信息，认为第四终端装置接收失败，组头采用混合自动重传请求(hybrid automatic repeat request，HARQ)技术向第四终端装置重传侧行数据。后续，新加入成员(如：第四终端装置)已经获得索引，可以利用索引确定发送SFCI的频域资源进行ACK/NACK反馈。
方式三中，第一终端装置可以通过感知并译码组播组中其他接收成员反馈的SFCI获得自身的索引，无需通过与第二终端装置的交互获取自身的索引，如此，可以减少设备间的信令交互，提高资源利用率。
图4所示方法以采用码分复用的方式，将多个终端装置反馈的SFCI发送给发送终端为例进行了说明，在又一可行方案中，还可以采用码分复用的方式，将多个终端装置反馈的SFCI重复发送给发送终端，以提高PSFCH反馈资源的资源率以及SFCI的传输可靠性。具体的，该可行方案可参照图8所示。
图8为本申请实施例提供的又一种SFCI的发送方法，如图8所示，该方法可以包括：
步骤801：第二终端装置向第一终端装置发送侧行数据。
其中，步骤801可参照步骤401所述，不予赘述。
步骤802：第一终端装置从第二终端装置接收侧行数据。
其中，步骤802可参照步骤402所述，不予赘述。
步骤803：第一终端装置根据侧行数据的传输资源确定可用的PSFCH反馈资源。
其中，PSFCH反馈资源的几种实现格式可参照图4所示方法的第一个场景中所述，步骤803的具体执行过程可参照步骤403所述，不予赘述。
步骤804：第一终端装置根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数。
其中，第一终端装置的索引U index的相关描述、X个第二资源单元内可复用的正交码序列的个数的相关描述可参照步骤404中所述。第一终端装置的索引U index的获取方式可参照上述方式一～方式三中所述，组播组中接收成员的个数Q的获取方式可参照上述方式三中所述，不予赘述。
其中，用于发送SFCI的频域资源可以包括用于发送SFCI的频域资源的频域起始位置和频域带宽。步骤804中，用于发送SFCI的频域资源的频域带宽等于SFCI的重复发送次数与发送一次SFCI需要的第二资源单元的个数X的乘积。
示例性的，第一终端装置根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数，可以包括：
第一终端装置根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；
第一终端装置根据组播组中接收成员的个数Q以及可在X个第二资源单元内传输SFCI的终端装置的个数K，确定所有接收成员向第二终端装置发送一次SFCI需要的第二资源单元的个数
Figure PCTCN2019101155-appb-000036
表示向下取整；
第一终端装置根据可用的PSFCH反馈资源的第二资源单元的个数P以及S，确定所有接收成员在可用的PSFCH反馈资源上，可重复向第二终端装置发送SFCI的最少次数
Figure PCTCN2019101155-appb-000037
以及可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；
第一终端装置根据第一终端装置的索引值U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置的逻辑索引为：
Figure PCTCN2019101155-appb-000038
若i<Re，则确定用于发送SFCI的频域资源的频域起始位置与可用的PSFCH反馈资源的频域起始位置相隔i×(Rp+1)×X个第二资源单元，用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，即用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的频域起始位置偏移i×(Rp+1)×X个第二资源单元后的首个第二资源单元，SFCI的重复发送次数为Rp+1；
若i>＝Re，则确定用于发送SFCI的频域资源的频域起始位置与可用的PSFCH反馈资源的的频域起始位置相隔(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元，即用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的频域起始位置偏移(Re×(Rp+1)+(i-Re)×Rp)×X个后的首个第二资源单元，SFCI的重复发送次数为Rp。
步骤805：第一终端装置根据用于发送SFCI的频域资源和SFCI的重复发送次数，向第二终端装置重复发送SFCI。
示例性的，以SFCI的重复发送次数为C为例，第一终端装置可以在以用于发送SFCI的频域资源的频域起始位置为起始的X×C个第二资源单元上，通过一个PSFCH向第二终端装置重复发送C个SFCI，每个SCFI占用X个第二资源单元。
以SFCI包括ACK或者NACK为例，当第一终端装置成功译码接收到侧行数据时，第一终端装置可以在以用于发送SFCI的频域资源的频域起始位置为起始的X×C个第二资源单元上，通过一个PSFCH向第二终端装置重复发送C个索引为mod(2×UE index，L)的正交码序列；
当第一终端装置译码侧行数据失败时，第一终端装置可以在以用于发送SFCI的频域资源的频域起始位置为起始的X×C个第二资源单元上，通过一个PSFCH向第二终端装置发送重复发送C个索引为mod(2×UE index+1，L)的正交码序列。
需要说明的是，本申请实施例不限于发送ACK时使用索引为mod(2×UE index，L)的正交码序列，发送NACK时使用索引为mod(2×UE index+1，L)的正交码序列，还可以发送ACK时使用索引为mod(2×UE index+1，L)的正交码序列，发送NACK时使用索引为mod(2×UE index，L)的正交码序列。
例如，如图9所示，以SFCI为ACK/NACK反馈，发送一次SFCI需要一个子信道为例，假设PSFCH反馈资源的配置周期N＝2，预先配置的一个子信道内可复用的正交码序列的个数为n＝12，则发送每个时隙上的侧行数据对应的SFCI所需一个子信道内可复用的 正交码序列的个数为
Figure PCTCN2019101155-appb-000039
即一个子信道内可复用的终端装置的个数为3个，在第一个时隙发送的侧行数据对应的SFCI可以使用前6个正交码序列，第二个时隙发送的侧行数据对应的SFCI可以使用后6个正交码序列，针对每个时隙发送的侧行数据最多可以支持3个UE的SFCI复用在一个子信道对应的PSFCH频域资源上。
如果一个组播通信中有7个UE，其中1个发送UE，6个接收UE，发送UE可以向接收UE组播侧行数据，6个接收UE的索引分别为0，1，2，…，5，则至少需要2个子信道才能支持所有6个接收UE进行ACK/NACK反馈。如果根据发送UE组播的侧行数据的传输资源确定的可用的PSFCH反馈资源包括5个子信道，此时，通过公式
Figure PCTCN2019101155-appb-000040
可以确定至少可以重复发送的次数为Rp＝2次，同时还剩余Re＝1个子信道。根据公式
Figure PCTCN2019101155-appb-000041
可以确定：用于发送索引为0，1，2的接收UE的SFCI的频域资源的频域起始位置的逻辑索引i为0，小于Re＝1，根据公式i×(Rp+1)×X可以确定该3个接收UE的SFCI的频域资源的频域起始位置与PSFCH反馈资源的频域起始位置间的偏移值为0，用于发送索引为0，1，2的接收UE的SFCI的频域资源的频域起始位置为子信道1，根据公式Rp+1可以确定索引为0，1，2的三个接收UE重复发送SFCI的次数为3，即这三个接收UE可以占用子信道1～子信道3三个子信道，重复发送SFCI3次。
同理，根据公式
Figure PCTCN2019101155-appb-000042
可以确定：用于发送索引为3，4，5的接收UE的SFCI的频域资源的频域起始位置的逻辑索引i为1，等于Re，根据公式(Re×(Rp+1)+(i-Re)×Rp)×X可以确定用于发送该3个接收UE的SFCI的频域资源的频域起始位置与PSFCH反馈资源的频域起始位置间的偏移值为3，用于发送索引为3，4，5的接收UE的SFCI的频域资源的频域起始位置为子信道4，索引为3，4，5的三个接收UE重复发送SFCI的次数为2，即这三个接收UE可以占用子信道4～子信道5两个子信道，重复发送SFCI2次。
其中，根据公式mod(2×UE index，L)以及mod(2×UE index+1，L)可以确定索引为0的接收UE可以使用索引为0和1的正交码序列表示ACK和NACK，索引为1的接收UE可以使用索引为2和3的正交码序列表示ACK和NACK，索引为2的接收UE可以使用索引为4和5的正交码序列表示ACK和NACK。索引为3的接收UE可以使用索引为0和1的正交码序列表示ACK和NACK，索引为4的接收UE可以使用索引为2和3的正交码序列表示ACK和NACK，索引为5的接收UE可以使用索引为4和5的正交码序列表示ACK和NACK。
需要说明的是，本申请不限定终端装置的起始索引，本申请实施例仅以终端装置的起始索引为0进行描述，可替换的，终端装置的起始索引还可以为1或者其他数值，正交码序列的起始索引还可以为1或者其他数值，不予限制。当终端装置的起始索引为大于0的其他整数，仍可以采用上述方案确定第一终端装置向第二终端装置发送的SFCI的频域资源的频域起始位置、发送SFCI使用的正交码序列。
步骤806：第二终端装置在用于发送SFCI的频域资源上，接收第一终端装置重复发送的SFCI。
其中，第二终端装置可以参照步骤803确定可用的PSFCH反馈资源，再根据步骤804所述过程，确定可用的PSFCH反馈资源上用于发送SFCI的频域资源的频域起始位置、SFCI的重复发送次数以及第一终端装置发送SFCI所使用的正交码序列；
以SFCI的重复发送次数为C为例，第二终端装置可以在以用于发送SFCI的频域资源的频域起始位置为起始的X×C个第二资源单元上，通过一个PSFCH接收第一终端装置重复发送的C个正交码序列，解析C个正交码得到第一终端装置向第二终端装置反馈的SFCI。
需要说明的是，图8所示步骤802～步骤806以组播组中的第一终端装置向第二终端装置反馈SFCI为例，对本申请实施例提供的SFCI的发送方法进行了介绍。可理解的是，该组播组中的其他接收成员，如：第三终端装置、第四终端装置等也可参照图8所示步骤向第二终端装置发送SFCI，对应的，第二终端装置也可以采用步骤806所述方式接收组播组内的其他成员反馈的SFCI，不予赘述。
此外，图8所示方法以多个终端装置设备采用码分复用(code division multiplexing，CDM)方式，将用于指示SFCI的多个正交码序列复用在一起反馈给发送终端为例，对本申请实施例提供的SFCI发送方法进行描述。参照图8所示的发送SFCI的原理，可替换的，组播组内的多个接收终端还可以采用其他复用方式向发送终端反馈SFCI，如：可以采用频分复用或者时分复用或者时频复用或者频分+码分复用或者时分+码分复用或者时频复用+码分复用的方式向发送终端反馈SFCI，不予限制。
进一步的，为了提高PSFCH反馈资源的利用率，若组播组中的所有接收成员采用图8所示方法向发送终端重复发送SFCI后，PSFCH反馈资源上还有剩余资源，则组播组中的接收成员还可以将自身的其他辅助信息，如：CSI和/或RMAI，在剩余的资源上采用码分复用方式反馈给发送终端，以此提高PSFCH反馈资源的利用率。
基于图8所示方法，组播组中的接收终端根据接收到的侧行数据的传输资源确定可用的PSFCH反馈资源后，接收终端通过终端装置的索引、发送一次SFCI需要的资源单元的大小、可用正交码序列以及组播组中接收成员的数量等信息，确定接收终端向发送终端发送的SFCI在可用的PSFCH反馈资源的频域起始位置、SFCI的重复发送次数以及发送SFCI使用的正交码序列，实现组播通信中多个接收终端对PSSCH传输的SFCI反馈，尤其是ACK/NACK反馈，解决现有无法为组播通信场景下各接收终端反馈的SFCI确定频域资源的问题。同时，利用PSFCH反馈资源向发送终端重复发送SFCI提高传输可靠性，此外，重复传输SFCI时占用连续的频域资源可以进一步降低功率影响，提高SFCI传输可靠性。
上述主要从各个网元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，各个网元，例如SDN控制器、转发器为了实现上述功能，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很容易意识到，结合本文中所公开的实施例描述的各示例的算法步骤，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SDN控制器、转发器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。
在采用对应各个功能划分各个功能模块的情况下，图10示出了一种终端装置100的 结构图，该终端装置100可以为第一终端装置或者第一终端装置中的芯片或者片上系统，该终端装置100可以用于执行上述实施例中涉及的第一终端装置的功能。图10所示终端装置100包括：接收单元1001，处理单元1002以及发送单元1003。
作为一种可实现方式，接收单元1001，用于从第二终端装置接收侧行数据；侧行数据的传输资源包括M个第一资源单元，M为正整数；例如，接收单元1001可以支持终端装置100执行步骤402。
处理单元1002，用于根据侧行数据的传输资源，确定可用的PSFCH反馈资源；可用的PSFCH反馈资源包括P个第二资源单元；以及根据可用的PSFCH反馈资源、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源；X为发送SFCI需要的第二资源单元的个数，X为大于等于1的整数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。例如，处理单元1002可以支持终端装置100执行步骤403、步骤404。
发送单元1003，用于根据用于发送SFCI的频域资源，向第二终端装置发送SFCI。例如，发送单元1003可以支持终端装置100执行步骤405。
该实现方式中，处理单元1002，具体用于：根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码序列的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据第一终端装置的索引值U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第
Figure PCTCN2019101155-appb-000043
个第二资源单元。
发送单元1003，具体用于：在以第
Figure PCTCN2019101155-appb-000044
个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH向第二终端装置发送SFCI。
作为又一种可实现方式，接收单元1001，用于从第二终端装置接收侧行数据；侧行数据的传输资源包括M个第一资源单元，M为正整数；例如，接收单元1001可以支持终端装置100执行步骤802。
处理单元1002，用于根据侧行数据的传输资源，确定可用的PSFCH反馈资源；可用的PSFCH反馈资源包括P个第二资源单元；以及根据所述可用的PSFCH反馈资源、组播组中接收成员的个数Q、所述第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数；X为发送SFCI需要的第二资源单元的个数，X为大于等于1的整数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。例如，处理单元1002可以支持终端装置100执行步骤803、步骤804。
发送单元1003，用于根据用于发送SFCI的频域资源以及SFCI的重复发送次数，向第二终端装置重复发送SFCI。例如，发送单元1003可以支持终端装置100执行步骤805。
该又一种可能的设计中，处理单元1002，具体用于：根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据组播组中接收成员的个数Q以及可在X个第二资源单元内传输SFCI的终端装置的个数K，确定所有接收成员向第二终端装置发送一次SFCI需要的第二资源单元的个数
Figure PCTCN2019101155-appb-000045
根据可用的PSFCH反馈资源的第二资源单元的个数P以及S，确定所有接收成员在可用的PSFCH反馈资源上，可重复向第二终端装 置发送SFCI的最少次数
Figure PCTCN2019101155-appb-000046
以及可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；根据第一终端装置的索引值U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置的逻辑索引为：
Figure PCTCN2019101155-appb-000047
若i<Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，SFCI的重复发送次数为Rp+1；若i>＝Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,SFCI的重复发送次数为Rp。
发送单元1003，具体用于：若i<Re，在以第i×(Rp+1)×X个第二资源单元为起始的(Rp+1)×X个第二资源单元上，通过一个PSFCH向第二终端装置发送(Rp+1)次SFCI；若i>＝Re，在以第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元为起始的Rp×X个第二资源单元上，通过一个PSFCH向第二终端装置发送Rp次SFCI。
上述两种可能的实现方式中，处理单元1002，还用于根据第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数L，确定发送SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。
其中，在上述两种可能的实现方式中，第一终端装置的索引值U index预先配置；或者，第一终端装置的索引值U index由第二终端装置通知给第一终端装置；或者，第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。
其中，组播组中接收成员的个数由第二终端装置通知给第一终端装置。
作为又一种可实现方式，图10中的处理单元1002可以由处理器代替，该处理器可以集成处理单元1002的功能。图10中的发送单元1003、接收单元1001可以由收发器代替，该收发器可以集成发送单元1003、接收单元1001的功能。进一步的，图10所示终端装置100还可以包括存储器。
当处理单元1002有处理器代替，发送单元1003、接收单元1001由收发器代替时，本申请实施例所涉及的终端装置100可以为图3所示终端装置。
图11示出了一种终端装置110的结构图，该终端装置110可以为第二终端装置或者第二终端装置中的芯片或者片上系统，该终端装置110可以用于执行上述实施例中涉及的第二终端装置的功能。作为一种可实现方式，图11所示终端装置110包括：发送单元1101，接收单元1103；
一种示例中，发送单元1101，用于向第一终端装置发送侧行数据；侧行数据的传输资源包括M个第一资源单元，M为正整数。例如，发送单元1101可以支持终端装置110执行步骤401。
处理单元1102，用于根据侧行数据的传输资源，确定可用的PSFCH反馈资源；可用的PSFCH反馈资源包括P个第二资源单元；以及根据可用的PSFCH反馈资源、第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源；X为发送SFCI需要的第二资源单元的个数，X为大于等于1的整数；SFCI用于至少指示第一终端装置是否正确接收侧行数据。例如，处理单元1102可以支持终端装置110执行步骤406。
接收单元1103，用于在用于发送SFCI的频域资源上，接收来自第一终端装置的SFCI。例如，接收单元1103可以支持终端装置110执行步骤406。
其中，处理单元1102，具体用于：根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码序列的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据第一终端装置的索引值U index、可在X个第二资源单元内传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第
Figure PCTCN2019101155-appb-000048
个第二资源单元。
其中，接收单元1103，具体用于：在以第
Figure PCTCN2019101155-appb-000049
个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH接收来自第一终端装置的SFCI。基于该可能的设计，接收单元1103可以在PSFCH反馈资源上接收第一终端装置发送的一次SFCI。
又一种示例中，发送单元1101，用于向第一终端装置发送侧行数据；侧行数据的传输资源包括M个第一资源单元，M为正整数。例如，发送单元1101可以支持终端装置110执行步骤801。
处理单元1102，用于根据侧行数据的传输资源，确定可用的PSFCH反馈资源；可用的PSFCH反馈资源包括P个第二资源单元；以及根据可用的PSFCH反馈资源、组播组中接收成员的个数Q、第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及SFCI的重复发送次数；X为发送SFCI需要的第二资源单元的个数，X为大于等于1的整数；SFCI用于指示第一终端装置是否正确接收侧行数据。例如，处理单元1102可以支持终端装置110执行步骤806。
接收单元1103，用于在用于发送SFCI的频域资源上，接收第一终端装置重复发送的SFCI。例如，接收单元1103可以支持终端装置110执行步骤806。
其中，处理单元1102，具体用于：根据X个第二资源单元内可复用的正交码序列的个数以及发送SFCI需要的正交码的个数，确定可在X个第二资源单元内传输SFCI的终端装置的个数K；根据组播组中接收成员的个数Q以及可在X个第二资源单元内传输SFCI的终端装置的个数K，确定所有接收成员向第二终端装置发送一次SFCI需要的第二资源单元的个数
Figure PCTCN2019101155-appb-000050
根据可用的PSFCH反馈资源的第二资源单元的个数P以及S，确定所有接收成员在可用的PSFCH反馈资源上，可重复向第二终端装置发送SFCI的最少次数
Figure PCTCN2019101155-appb-000051
以及可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；根据第一终端装置的索引值U index、可在X个第二资源单元传输SFCI的终端装置的个数K，确定用于发送SFCI的频域资源的频域起始位置的逻辑索引为：
Figure PCTCN2019101155-appb-000052
Figure PCTCN2019101155-appb-000053
若i<Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，SFCI的重复发送次数为Rp+1；若i>＝Re，则确定用于发送SFCI的频域资源的频域起始位置为可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,SFCI的重复发送次数为Rp。
其中，发送单元1101，具体用于：若i<Re，在以第i×(Rp+1)×X个第二资源单元为起始的(Rp+1)×X个第二资源单元上，通过一个PSFCH接收第一终端装置发送的(Rp+1)次SFCI；若i>＝Re，在以第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元为起始的Rp×X个第二资源单元上，通过一个PSFCH接收第一终端装置发送的Rp次SFCI。基于该可能的设计，接收单元1103可以在PSFCH反馈资源上接收第一终端装置重复发送的多次SFCI。
上述两种示例中，处理单元1102，还用于根据第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数L，确定发送SFCI需要的正交码序列为索引为 mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。
其中，第一终端装置的索引值U index预先配置；或者，第一终端装置的索引值U index由第二终端装置通知给第一终端装置；或者，第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。
作为又一种可实现方式，图11中的处理单元1102可以由处理器代替，该处理器可以集成处理单元1102的功能。图11中的发送单元1101、接收单元1103可以由收发器代替，该收发器可以集成发送单元1101、接收单元1103的功能。进一步的，图11所示终端装置110还可以包括存储器。
当处理单元1102有处理器代替，发送单元1101、接收单元1103由收发器代替时，本申请实施例所涉及的终端装置110可以为图3所示终端装置。
图12为本申请实施例提供的一种SFCI的发送系统的结构图，如图12所示，该系统可以包括：第一终端装置120、第二终端装置121，还可以包括：第三终端装置120。
其中，第一终端装置120、第三终端装置120具备图10所示的终端装置100的功能。第二终端装置121具备图11所示的终端装置110功能。
一种示例中，第一终端装置120，用于根据从第二终端装置121接收的侧行数据确定可用的PSFCH反馈资源，根据可用的PSFCH反馈资源、第一终端装置120的索引、可复用的正交码序列的个数，确定用于发送SFCI的频域资源，根据用于发送SFCI的频域资源，向第二终端装置121发送SFCI。
又一种示例中，第一终端装置120，用于根据从第二终端装置121接收的侧行数据确定可用的PSFCH反馈资源，根据可用的PSFCH反馈资源、组播组中接收成员的个数、第一终端装置120的索引、可复用的正交码序列的个数，确定用于发送SFCI的频域资源和SFCI的重复发送次数，根据用于发送SFCI的频域资源和SFCI的重复发送次数向第二终端装置121重复发送SFCI。
具体的，该可能的设计中，第一终端装置120的具体实现过程可参照上述图4、图8方法实施例涉及的第一终端装置的执行过程，第二终端装置121的具体实现过程可参照上述图4、图8方法实施例涉及第二终端装置的执行过程。
基于图12所示系统，组播组中的第一终端装置120根据接收到的侧行数据的传输资源确定可用的PSFCH反馈资源后，第一终端装置120通过终端装置的索引、发送一次SFCI需要的资源单元的大小、可用正交码序列、组播组中接收成员的个数等信息，确定第一终端装置120向第二终端装置121发送的SFCI在可用的PSFCH反馈资源的频域起始位置、SFCI的频域带宽以及发送SFCI使用的正交码序列，实现组播通信中多个第一终端装置120对PSSCH传输的SFCI反馈，尤其是ACK/NACK反馈，解决现有无法为组播通信场景下各第一终端装置120反馈的SFCI确定频域资源的问题。
本申请实施例还提供了一种计算机可读存储介质。上述方法实施例中的全部或者部分流程可以由计算机程序来指令相关的硬件完成，该程序可存储于上述计算机可读存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。计算机可读存储介质可以是前述任一实施例的终端装置(包括数据发送端和/或数据接收端)的内部存储单元，例如终端装置的硬盘或内存。上述计算机可读存储介质也可以是上述终端装置的外部存储设备，例如上述终端装置上配备的插接式硬盘，智能存储卡(smart media card,SMC)，安全数字 (secure digital,SD)卡，闪存卡(flash card)等。进一步地，上述计算机可读存储介质还可以既包括上述终端装置的内部存储单元也包括外部存储设备。上述计算机可读存储介质用于存储上述计算机程序以及上述终端装置所需的其他程序和数据。上述计算机可读存储介质还可以用于暂时地存储已经输出或者将要输出的数据。
需要说明的是，本申请的说明书、权利要求书及附图中的术语“第一”和“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
应当理解，在本申请中，“至少一个(项)”是指一个或者多个，“多个”是指两个或两个以上，“至少两个(项)”是指两个或三个及三个以上，“和/或”，用于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：只存在A，只存在B以及同时存在A和B三种情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b或c中的至少一项(个)，可以表示：a，b，c，“a和b”，“a和c”，“b和c”，或“a和b和c”，其中a，b，c可以是单个，也可以是多个。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，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，所述模块或单元的划分，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，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述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一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。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。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元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，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例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全部或部分可以以软件产品的形式体现出来，该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个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储 程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (50)

  1. 一种侧行反馈控制信息SFCI的发送方法，其特征在于，所述方法包括：
    第一终端装置从第二终端装置接收侧行数据；所述侧行数据的传输资源包括M个第一资源单元，所述M为正整数；
    所述第一终端装置根据所述侧行数据的传输资源，确定可用的物理侧行反馈信道PSFCH反馈资源；所述可用的PSFCH反馈资源包括P个第二资源单元；
    所述第一终端装置根据所述可用的PSFCH反馈资源、所述第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源；所述X为发送所述SFCI需要的第二资源单元的个数，所述X为大于等于1的整数；所述SFCI用于至少指示所述第一终端装置是否正确接收所述侧行数据；
    所述第一终端装置根据所述用于发送SFCI的频域资源，向所述第二终端装置发送所述SFCI。
  2. 根据权利要求1所述的方法，其特征在于，所述用于发送SFCI的频域资源包括用于发送SFCI的频域资源的频域起始位置，所述第一终端装置根据所述可用的PSFCH反馈资源、所述第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源，包括：
    所述第一终端装置根据所述X个第二资源单元内可复用的正交码序列的个数以及发送所述SFCI需要的正交码序列的个数，确定可在所述X个第二资源单元内传输SFCI的终端装置的个数K；
    所述第一终端装置根据所述第一终端装置的索引值U index、所述个数K，确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第
    Figure PCTCN2019101155-appb-100001
    个第二资源单元。
  3. 根据权利要求2所述的方法，其特征在于，所述第一终端装置根据所述用于发送所述SFCI的频域资源，向所述第二终端装置发送所述SFCI，包括：
    所述第一终端装置在以所述第
    Figure PCTCN2019101155-appb-100002
    个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH向所述第二终端装置发送所述SFCI。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置根据所述第一终端装置的索引值U index以及所述X个第二资源单元内可复用的正交码序列的个数L，确定发送所述SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，
    所述第一终端装置的索引值U index预先配置；或者，
    所述第一终端装置的索引值U index由所述第二终端装置通知给所述第一终端装置；或者，
    所述第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。
  6. 一种侧行反馈控制信息SFCI的发送方法，其特征在于，所述方法包括：
    第二终端装置向第一终端装置发送侧行数据；所述侧行数据的传输资源包括M个第一资源单元，所述M为正整数；
    所述第二终端装置根据所述侧行数据的传输资源，确定可用的物理侧行反馈信道PSFCH反馈资源；所述可用的PSFCH反馈资源包括P个第二资源单元；
    所述第二终端装置根据所述可用的PSFCH反馈资源、所述第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源；所述X为发送所述SFCI需要的第二资源单元的个数，所述X为大于等于1的整数；所述SFCI用于至少指示所述第一终端装置是否正确接收所述侧行数据；
    所述第二终端装置在用于发送所述SFCI的频域资源上，接收来自所述第一终端装置的所述SFCI。
  7. 根据权利要求6所述的方法，其特征在于，所述用于发送SFCI的频域资源包括用于发送所述SFCI的频域资源的频域起始位置，所述第二终端装置根据所述可用的PSFCH反馈资源、所述第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源，包括：
    所述第二终端装置根据所述X个第二资源单元内可复用的正交码序列的个数以及发送所述SFCI需要的正交码序列的个数，确定可在所述X个第二资源单元内传输SFCI的终端装置的个数K；
    所述第二终端装置根据所述第一终端装置的索引值U index、所述个数K，确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第
    Figure PCTCN2019101155-appb-100003
    个第二资源单元。
  8. 根据权利要求7所述的方法，其特征在于，所述第二终端装置在用于发送所述发送SFCI的频域资源上，接收来自所述第一终端装置的所述SFCI，包括：
    所述第二终端装置在以所述第
    Figure PCTCN2019101155-appb-100004
    个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH接收来自所述第一终端装置的所述SFCI。
  9. 根据权利要求6-8任一项所述的方法，其特征在于，所述方法还包括：
    所述第二终端装置根据所述第一终端装置的索引值U index以及所述X个第二资源单元内可复用的正交码序列的个数L，确定发送所述SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。
  10. 根据权利要求6-9任一项所述的方法，其特征在于，
    所述第一终端装置的索引值U index预先配置；或者，
    所述第一终端装置的索引值U index由所述第二终端装置配置；或者，
    所述第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。
  11. 一种侧行反馈控制信息SFCI的发送方法，其特征在于，所述方法包括：
    第一终端装置从第二终端装置接收侧行数据；所述侧行数据的传输资源包括M个第一资源单元，所述M为正整数；
    所述第一终端装置根据所述侧行数据的传输资源，确定可用的物理侧行反馈信道PSFCH反馈资源；所述可用的PSFCH反馈资源包括P个第二资源单元；
    所述第一终端装置根据所述可用的PSFCH反馈资源、组播组中接收成员的个数Q、所述第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及所述SFCI的重复发送次数；所述X为发送所述SFCI需要的第二资源单元的个数，所述X为大于等于1的整数；所述SFCI用于指示所述第一终端装置是否正确接收所述侧行数据；
    所述第一终端装置根据用于发送所述SFCI的频域资源和所述SFCI的重复发送次数， 向所述第二终端装置重复发送所述SFCI。
  12. 根据权利要求11所述的方法，其特征在于，所述用于发送SFCI的频域资源包括用于发送所述SFCI的频域资源的频域起始位置；所述第一终端装置根据所述可用的PSFCH反馈资源、组播组中接收成员的个数Q、所述第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及所述SFCI的重复发送次数，包括：
    所述第一终端装置根据所述X个第二资源单元内可复用的正交码序列的个数以及发送所述SFCI需要的正交码的个数，确定可在所述X个第二资源单元内传输SFCI的终端装置的个数K；
    所述第一终端装置根据所述组播组中接收成员的个数Q以及所述个数K，确定所有接收成员向所述第二终端装置发送一次SFCI需要的第二资源单元的个数
    Figure PCTCN2019101155-appb-100005
    所述第一终端装置根据所述个数P以及所述S，确定所有接收成员在所述可用的PSFCH反馈资源上，可重复向所述第二终端装置发送SFCI的最少次数
    Figure PCTCN2019101155-appb-100006
    以及所述可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；
    所述第一终端装置根据所述第一终端装置的索引值U index、所述个数K，确定用于发送所述SFCI的频域资源的频域起始位置的逻辑索引为：
    Figure PCTCN2019101155-appb-100007
    若所述i<Re，则确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，所述SFCI的重复发送次数为Rp+1；
    若所述i>＝Re，则确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,所述SFCI的重复发送次数为Rp。
  13. 根据权利要求12所述的方法，其特征在于，所述第一终端装置根据所述频域资源的频域起始位置以及所述SFCI的重复发送次数，向所述第二终端装置重复发送所述SFCI，包括：
    若所述i<Re，所述第一终端装置在以所述第i×(Rp+1)×X个第二资源单元为起始的(Rp+1)×X个第二资源单元上，通过一个PSFCH向所述第二终端装置发送(Rp+1)次所述SFCI；
    若所述i>＝Re，所述第一终端装置在以所述第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元为起始的Rp×X个第二资源单元上，通过一个PSFCH向所述第二终端装置发送Rp次所述SFCI。
  14. 根据权利要求11-13任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置根据所述第一终端装置的索引值U index以及所述X个第二资源单元内可复用的正交码序列的个数L，确定发送所述SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。
  15. 根据权利要求11-14任一项所述的方法，其特征在于，
    所述第一终端装置的索引值U index预先配置；或者，
    所述第一终端装置的索引值U index由所述第二终端装置通知给所述第一终端装置；或者，
    所述第一终端装置的索引值U index是根据所述组播组中接收成员发送的SFCI而确定的。
  16. 根据权利要求11-15任一项所述的方法，其特征在于，
    所述组播组中接收成员的个数由所述第二终端装置通知给所述第一终端装置。
  17. 一种侧行反馈控制信息SFCI的发送方法，其特征在于，所述方法包括：
    第二终端装置向第一终端装置发送侧行数据；所述侧行数据的传输资源包括M个第一资源单元，所述M为正整数；
    所述第二终端装置根据所述侧行数据的传输资源，确定可用的物理侧行反馈信道PSFCH反馈资源；所述可用的PSFCH反馈资源包括P个第二资源单元；
    所述第二终端装置根据所述可用的PSFCH反馈资源、组播组中接收成员的个数Q、所述第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及所述SFCI的重复发送次数；所述X为发送所述SFCI需要的第二资源单元的个数，所述X为大于等于1的整数；所述SFCI用于指示所述第一终端装置是否正确接收所述侧行数据；
    所述第二终端装置在用于发送所述SFCI的频域资源上，接收所述第一终端装置重复发送的所述SFCI。
  18. 根据权利要求17所述的方法，其特征在于，所述用于发送SFCI的频域资源包括用于发送所述SFCI的频域资源的频域起始位置；所述第二终端装置根据所述可用的PSFCH反馈资源、所述组播组中接收成员的个数Q、所述第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送SFCI的频域资源以及所述SFCI的重复发送次数，包括：
    所述第二终端装置根据所述X个第二资源单元内可复用的正交码序列的个数以及发送所述SFCI需要的正交码的个数，确定可在所述X个第二资源单元内传输SFCI的终端装置的个数K；
    所述第二终端装置根据所述组播组中接收成员的个数Q以及所述个数K，确定所有接收成员向所述第二终端装置发送一次SFCI需要的第二资源单元的个数
    Figure PCTCN2019101155-appb-100008
    所述第二终端装置根据所述个数P以及所述S，确定所有接收成员在所述可用的PSFCH反馈资源上，可重复向所述第二终端装置发送SFCI的最少次数
    Figure PCTCN2019101155-appb-100009
    以及所述可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；
    所述第二终端装置根据所述第一终端装置的索引值U index、所述个数K，确定用于发送所述SFCI的频域资源的频域起始位置的逻辑索引为：
    Figure PCTCN2019101155-appb-100010
    若所述i<Re，则确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，所述SFCI的重复发送次数为Rp+1；
    若所述i>＝Re，则确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,所述SFCI的重复发送次数为Rp。
  19. 根据权利要求18所述的方法，其特征在于，所述第二终端装置在用于发送所述SFCI的频域资源上，接收所述第一终端装置重复发送的所述SFCI，包括：
    若所述i<Re，所述第二终端装置在以所述第i×(Rp+1)×X个第二资源单元为起始的(Rp+1)×X个第二资源单元上，通过一个PSFCH接收所述第一终端装置发送的(Rp+1)次所述SFCI；
    若所述i>＝Re，所述第二终端装置在以所述第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源 单元为起始的Rp×X个第二资源单元上，通过一个PSFCH接收所述第一终端装置发送的Rp次所述SFCI。
  20. 根据权利要求17-19任一项所述的方法，其特征在于，所述方法还包括：
    所述第二终端装置根据所述第一终端装置的索引值U index以及所述X个第二资源单元内可复用的正交码序列的个数L，确定接收的所述SFCI使用的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。
  21. 根据权利要求17-20任一项所述的方法，其特征在于，
    所述第一终端装置的索引值U index预先配置；或者，
    所述第一终端装置的索引值U index由所述第二终端装置配置；或者，
    所述第一终端装置的索引值U index是根据所述组播组中接收成员发送的SFCI而确定的。
  22. 一种第一终端装置，其特征在于，包括：
    接收单元，用于从第二终端装置接收侧行数据；所述侧行数据的传输资源包括M个第一资源单元，所述M为正整数；
    处理单元，用于根据所述侧行数据的传输资源，确定可用的物理侧行反馈信道PSFCH反馈资源；所述可用的PSFCH反馈资源包括P个第二资源单元；
    以及，根据所述可用的PSFCH反馈资源、所述第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送侧行反馈控制信息SFCI的频域资源；所述X为发送所述SFCI需要的第二资源单元的个数，所述X为大于等于1的整数；所述SFCI用于至少指示所述第一终端装置是否正确接收所述侧行数据；
    发送单元，用于根据所述用于发送SFCI的频域资源，向所述第二终端装置发送所述SFCI。
  23. 根据权利要求22所述的第一终端装置，其特征在于，所述用于发送SFCI的频域资源包括用于发送SFCI的频域资源的频域起始位置；所述处理单元，用于：
    根据所述X个第二资源单元内可复用的正交码序列的个数以及发送所述SFCI需要的正交码序列的个数，确定可在所述X个第二资源单元内传输SFCI的终端装置的个数K；
    根据所述第一终端装置的索引值U index、所述个数K，确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第
    Figure PCTCN2019101155-appb-100011
    个第二资源单元。
  24. 根据权利要求23所述的第一终端装置，其特征在于，
    所述发送单元，还用于在以所述第
    Figure PCTCN2019101155-appb-100012
    个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH向所述第二终端装置发送所述SFCI。
  25. 根据权利要求22-24任一项所述的第一终端装置，其特征在于，
    所述处理单元，还用于根据所述第一终端装置的索引值U index以及所述X个第二资源单元内可复用的正交码序列的个数L，确定发送所述SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。
  26. 根据权利要求22-25任一项所述的第一终端装置，其特征在于，
    所述第一终端装置的索引值U index预先配置；或者，
    所述第一终端装置的索引值U index由所述第二终端装置通知给所述第一终端装置；或者，
    所述第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。
  27. 一种第二终端装置，其特征在于，包括：
    发送单元，用于向第一终端装置发送侧行数据；所述侧行数据的传输资源包括M个第一资源单元，所述M为正整数；
    处理单元，用于根据所述侧行数据的传输资源，确定可用的物理侧行反馈信道PSFCH反馈资源；所述可用的PSFCH反馈资源包括P个第二资源单元；
    以及，根据所述可用的PSFCH反馈资源、所述第一终端装置的索引U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送侧行反馈控制信息SFCI的频域资源；所述X为发送所述SFCI需要的第二资源单元的个数，所述X为大于等于1的整数；所述SFCI用于至少指示所述第一终端装置是否正确接收所述侧行数据；
    接收单元，用于在用于发送所述SFCI的频域资源上，接收来自所述第一终端装置的所述SFCI。
  28. 根据权利要求27所述的第二终端装置，其特征在于，所述处理单元，用于：
    根据所述X个第二资源单元内可复用的正交码序列的个数以及发送所述SFCI需要的正交码序列的个数，确定可在所述X个第二资源单元内传输SFCI的终端装置的个数K；
    根据所述第一终端装置的索引值U index、所述个数K，确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第
    Figure PCTCN2019101155-appb-100013
    个第二资源单元。
  29. 根据权利要求28所述的第二终端装置，其特征在于，
    所述接收单元，还用于在以所述第
    Figure PCTCN2019101155-appb-100014
    个第二资源单元为起始的X个第二资源单元上，通过一个PSFCH接收来自所述第一终端装置的所述SFCI。
  30. 根据权利要求27-29任一项所述的第二终端装置，其特征在于，
    所述处理单元，还用于根据所述第一终端装置的索引值U index以及所述X个第二资源单元内可复用的正交码序列的个数L，确定发送所述SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。
  31. 根据权利要求27-30任一项所述的第二终端装置，其特征在于，
    所述第一终端装置的索引值U index预先配置；或者，
    所述第一终端装置的索引值U index由所述第二终端装置配置；或者，
    所述第一终端装置的索引值U index是根据组播组中接收成员发送的SFCI而确定的。
  32. 一种第一终端装置，其特征在于，包括：
    接收单元，用于从第二终端装置接收侧行数据；所述侧行数据的传输资源包括M个第一资源单元，所述M为正整数；
    处理单元，用于根据所述侧行数据的传输资源，确定可用的物理侧行反馈信道PSFCH反馈资源；所述可用的PSFCH反馈资源包括P个第二资源单元；
    以及，根据所述可用的PSFCH反馈资源、组播组中接收成员的个数Q、所述第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送侧行反馈控制信息SFCI的频域资源以及所述SFCI的重复发送次数；所述X为发送所述SFCI需要的第二资源单元的个数，所述X为大于等于1的整数；所述SFCI用于指示所述第一终端装置是否正确接收所述侧行数据；
    发送单元，用于根据用于发送所述SFCI的频域资源和所述SFCI的重复发送次数，向所述第二终端装置重复发送所述SFCI。
  33. 根据权利要求32所述的第一终端装置，其特征在于，所述用于发送SFCI的频域 资源包括用于发送所述SFCI的频域资源的频域起始位置；所述处理单元，用于：
    根据所述X个第二资源单元内可复用的正交码序列的个数以及发送所述SFCI需要的正交码的个数，确定可在所述X个第二资源单元内传输SFCI的终端装置的个数K；
    根据所述组播组中接收成员的个数Q以及所述个数K，确定所有接收成员向所述第二终端装置发送一次SFCI需要的第二资源单元的个数
    Figure PCTCN2019101155-appb-100015
    根据所述个数P以及所述S，确定所有接收成员在所述可用的PSFCH反馈资源上，可重复向所述第二终端装置发送SFCI的最少次数
    Figure PCTCN2019101155-appb-100016
    以及所述可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；
    根据所述第一终端装置的索引值U index、所述个数K，确定用于发送所述SFCI的频域资源的频域起始位置的逻辑索引为：
    Figure PCTCN2019101155-appb-100017
    若所述i<Re，则确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，所述SFCI的重复发送次数为Rp+1；
    若所述i>＝Re，则确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,所述SFCI的重复发送次数为Rp。
  34. 根据权利要求33所述的第一终端装置，其特征在于，
    所述发送单元，还用于若所述i<Re，在以所述第i×(Rp+1)×X个第二资源单元为起始的(Rp+1)×X个第二资源单元上，通过一个PSFCH向所述第二终端装置发送(Rp+1)次所述SFCI；
    若所述i>＝Re，在以所述第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元为起始的Rp×X个第二资源单元上，通过一个PSFCH向所述第二终端装置发送Rp次所述SFCI。
  35. 根据权利要求32-34任一项所述的第一终端装置，其特征在于，
    所述处理单元，还用于根据所述第一终端装置的索引值U index以及所述X个第二资源单元内可复用的正交码序列的个数L，确定发送所述SFCI需要的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。
  36. 根据权利要求32-35任一项所述的第一终端装置，其特征在于，
    所述第一终端装置的索引值U index预先配置；或者，
    所述第一终端装置的索引值U index由所述第二终端装置通知给所述第一终端装置；或者，
    所述第一终端装置的索引值U index是根据所述组播组中接收成员发送的SFCI而确定的。
  37. 根据权利要求32-36任一项所述的第一终端装置，其特征在于，
    所述组播组中接收成员的个数由所述第二终端装置通知给所述第一终端装置。
  38. 一种第二终端装置，其特征在于，包括：
    发送单元，用于向第一终端装置发送侧行数据；所述侧行数据的传输资源包括M个第一资源单元，所述M为正整数；
    处理单元，用于根据所述侧行数据的传输资源，确定可用的物理侧行反馈信道PSFCH反馈资源；所述可用的PSFCH反馈资源包括P个第二资源单元；
    以及，根据所述可用的PSFCH反馈资源、组播组中接收成员的个数Q、所述第一终端装置的索引值U index、X个第二资源单元内可复用的正交码序列的个数，确定用于发送侧行反馈控制信息SFCI的频域资源以及所述SFCI的重复发送次数；所述X为发送所述SFCI 需要的第二资源单元的个数，所述X为大于等于1的整数；所述SFCI用于指示所述第一终端装置是否正确接收所述侧行数据；
    接收单元，用于在用于发送所述SFCI的频域资源上，接收所述第一终端装置重复发送的所述SFCI。
  39. 根据权利要求38所述的第二终端装置，其特征在于，所述用于发送SFCI的频域资源包括用于发送所述SFCI的频域资源的频域起始位置；所述处理单元，用于：
    根据所述X个第二资源单元内可复用的正交码序列的个数以及发送所述SFCI需要的正交码的个数，确定可在所述X个第二资源单元内传输SFCI的终端装置的个数K；
    根据所述组播组中接收成员的个数Q以及所述个数K，确定所有接收成员向所述第二终端装置发送一次SFCI需要的第二资源单元的个数
    Figure PCTCN2019101155-appb-100018
    根据所述个数P以及所述S，确定所有接收成员在所述可用的PSFCH反馈资源上，可重复向所述第二终端装置发送SFCI的最少次数
    Figure PCTCN2019101155-appb-100019
    以及所述可用的PSFCH反馈资源中多余的第二资源单元个数Re＝mod(P，S)；
    根据所述第一终端装置的索引值U index、所述个数K，确定用于发送所述SFCI的频域资源的频域起始位置的逻辑索引为：
    Figure PCTCN2019101155-appb-100020
    若所述i<Re，则确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第i×(Rp+1)×X个第二资源单元，所述SFCI的重复发送次数为Rp+1；
    若所述i>＝Re，则确定用于发送所述SFCI的频域资源的频域起始位置为所述可用的PSFCH反馈资源的第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元,所述SFCI的重复发送次数为Rp。
  40. 根据权利要求39所述的第二终端装置，其特征在于，
    所述接收单元，还用于若所述i<Re，在以所述第i×(Rp+1)×X个第二资源单元为起始的(Rp+1)×X个第二资源单元上，通过一个PSFCH接收所述第一终端装置发送的(Rp+1)次所述SFCI；
    若所述i>＝Re，在以所述第(Re×(Rp+1)+(i-Re)×Rp)×X个第二资源单元为起始的Rp×X个第二资源单元上，通过一个PSFCH所述第一终端装置发送的Rp次所述SFCI。
  41. 根据权利要求38-40任一项所述的第二终端装置，其特征在于，
    所述处理单元，还用于根据所述第一终端装置的索引值U index以及所述X个第二资源单元内可复用的正交码序列的个数L，确定接收的所述SFCI使用的正交码序列为索引为mod(2×UE index，L)的正交码序列和索引为mod(2×UE index+1，L)的正交码序列。
  42. 根据权利要求38-41任一项所述的第二终端装置，其特征在于，
    所述第一终端装置的索引值U index预先配置；或者，
    所述第一终端装置的索引值U index由所述第二终端装置配置；或者，
    所述第一终端装置的索引值U index是根据所述组播组中接收成员发送的SFCI而确定的。
  43. 一种第一终端装置，其特征在于，所述终端装置包括一个或多个处理器和一个或多个存储器；所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码或计算机指令；
    当所述一个或多个处理器执行所述计算机指令时，使得所述终端装置执行如权利要求1-5任一项所述的侧行反馈控制信息SFCI的发送方法。
  44. 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存储有计算机指令或程序，当所述计算机指令或程序在计算机上运行时，使得所述计算机执行如权利要求1-5任一项所述的侧行反馈控制信息SFCI的发送方法。
  45. 一种第二终端装置，其特征在于，所述终端装置包括一个或多个处理器和一个或多个存储器；所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码或计算机指令；
    当所述一个或多个处理器执行所述计算机指令时，使得所述终端装置执行如权利要求6-10任一项所述的侧行反馈控制信息SFCI的发送方法。
  46. 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存储有计算机指令或程序，当所述计算机指令或程序在计算机上运行时，使得所述计算机执行如权利要求6-10任一项所述的侧行反馈控制信息SFCI的发送方法。
  47. 一种第一终端装置，其特征在于，所述终端装置包括一个或多个处理器和一个或多个存储器；所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码或计算机指令；
    当所述一个或多个处理器执行所述计算机指令时，使得所述终端装置执行如权利要求11-16任一项所述的侧行反馈控制信息SFCI的发送方法。
  48. 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存储有计算机指令或程序，当所述计算机指令或程序在计算机上运行时，使得所述计算机执行如权利要求11-16任一项所述的侧行反馈控制信息SFCI的发送方法。
  49. 一种第二终端装置，其特征在于，所述终端装置包括一个或多个处理器和一个或多个存储器；所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码或计算机指令；
    当所述一个或多个处理器执行所述计算机指令时，使得所述终端装置执行如权利要求17-21任一项所述的侧行反馈控制信息SFCI的发送方法。
  50. 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存储有计算机指令或程序，当所述计算机指令或程序在计算机上运行时，使得所述计算机执行如权利要求17-21任一项所述的侧行反馈控制信息SFCI的发送方法。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024032323A1 (zh) * 2022-08-09 2024-02-15 华为技术有限公司 通信方法和通信装置
WO2024093399A1 (en) * 2023-07-31 2024-05-10 Lenovo (Beijing) Limited Psfch transmissions on an unlicensed spectrum

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109691146A (zh) * 2018-11-29 2019-04-26 北京小米移动软件有限公司 资源碰撞解决方法、装置及存储介质
WO2019151915A1 (en) * 2018-02-02 2019-08-08 Telefonaktiebolaget Lm Ericsson (Publ) Wireless node for receiving a wireless signal and method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112671523A (zh) * 2017-03-20 2021-04-16 华为技术有限公司 一种数据反馈资源的确定方法及装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019151915A1 (en) * 2018-02-02 2019-08-08 Telefonaktiebolaget Lm Ericsson (Publ) Wireless node for receiving a wireless signal and method thereof
CN109691146A (zh) * 2018-11-29 2019-04-26 北京小米移动软件有限公司 资源碰撞解决方法、装置及存储介质

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
HUAWEI; HISILICON: "Design and contents of PSCCH and PSFCH", 3GPP DRAFT; R1-1906596, vol. RAN WG1, 3 May 2019 (2019-05-03), Reno, USA, pages 1 - 12, XP051708632 *
HUAWEI; HISILICON: "Sidelink physical layer structure for NR V2X", 3GPP DRAFT; R1-1906007, vol. RAN WG1, 17 May 2019 (2019-05-17), Reno USA, pages 1 - 18, XP051708049 *
LG ELECTRONICS: "Discussion on physical layer structure for NR sidelink", 3GPP DRAFT; R1-1907012 DISCUSSION ON PHYSICAL LAYER STRUCTURE FOR NR SIDELINK, vol. RAN WG1, 3 May 2019 (2019-05-03), Reno, USA, pages 1 - 25, XP051709045 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024032323A1 (zh) * 2022-08-09 2024-02-15 华为技术有限公司 通信方法和通信装置
WO2024093399A1 (en) * 2023-07-31 2024-05-10 Lenovo (Beijing) Limited Psfch transmissions on an unlicensed spectrum

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