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WO2022267897A1 - 通信方法及装置 - Google Patents

通信方法及装置 Download PDF

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Publication number
WO2022267897A1
WO2022267897A1 PCT/CN2022/097892 CN2022097892W WO2022267897A1 WO 2022267897 A1 WO2022267897 A1 WO 2022267897A1 CN 2022097892 W CN2022097892 W CN 2022097892W WO 2022267897 A1 WO2022267897 A1 WO 2022267897A1
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WO
WIPO (PCT)
Prior art keywords
time
resource
terminal device
frequency domain
feedback
Prior art date
Application number
PCT/CN2022/097892
Other languages
English (en)
French (fr)
Inventor
苏宏家
董蕾
郭文婷
卢磊
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP22827393.4A priority Critical patent/EP4333343A1/en
Publication of WO2022267897A1 publication Critical patent/WO2022267897A1/zh
Priority to US18/543,942 priority patent/US20240129901A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present application relates to the technical field of communication, and in particular to a communication method and device.
  • a wireless communication system In a wireless communication system, according to different frequency bands used, it can be divided into licensed frequency bands and unlicensed frequency bands. In the unlicensed frequency band, the transmitting node needs to access the signal in a competitive manner.
  • energy-based detection and signal type detection are generally used.
  • energy-based detection a detection threshold (energy detection threshold) needs to be set. When the detected energy exceeds the detection threshold, it is judged that the channel is busy, and the transmitting node is not allowed to access the channel. When the detected energy is lower than the detection threshold, if it lasts for a period of time, the transmitting node is allowed to access the channel.
  • the physical layer sidelink feedback channel (physical sidelink feedback channel, PSFCH) information can be used to carry hybrid automatic repeat request ( hybrid automatic repeat request, HARQ) feedback information.
  • PSFCH physical sidelink feedback channel
  • the current PSFCH transmission method is not suitable for unlicensed frequency bands, resulting in that the communication reliability of the current SL system cannot be guaranteed.
  • the present application provides a communication method and device, which can improve communication reliability of an SL system in an unlicensed frequency band.
  • a communication method is provided.
  • the communication method can be executed by the first terminal device.
  • the first terminal device includes the first terminal device or components in the first terminal device.
  • the first terminal device may be a data receiving end in vehicle to everything (V2X) communication
  • the second terminal device may be a data sending end in V2X communication.
  • the first terminal device feeds back the data reception status to the second terminal device through the HARQ feedback information.
  • the components in the first terminal device may be, for example, a processor loaded in the data receiving end, a vehicle communication module, a chip or a chip system, and the like.
  • the first terminal device supports direct communication (PC5) interface communication.
  • the method provided by the first aspect includes that the first terminal device may receive the first data from the second terminal device, the first terminal device determines a feedback time unit within the channel occupation time, and the feedback time unit corresponds to the first data.
  • the first terminal device may also access the first channel, and send the first feedback information on the first frequency domain resource in the feedback time unit, and send the second feedback information on the second frequency domain resource in the feedback time unit information.
  • the first feedback information is an acknowledgment or negative response to the first data
  • the first frequency domain resource is determined according to the time-frequency resource carrying the first data
  • the frequency domain resource belongs to the first channel, and the first frequency domain resource does not overlap with the second frequency domain resource.
  • the second terminal device may be the second terminal device or a component in the second terminal device.
  • the first terminal device can receive the first data from the second terminal device, and determine a feedback time unit within the channel occupation time, and the feedback time unit corresponds to the first data.
  • the first terminal device may send the first feedback information on the first frequency domain resource in the feedback time unit, and send the second feedback information on the second frequency domain resource.
  • the first feedback information is an acknowledgment or negative response to the first data
  • the first frequency domain resource is determined according to the time-frequency resource carrying the first data
  • the frequency domain resource belongs to the first channel, and the first frequency domain resource does not overlap with the second frequency domain resource.
  • the communication reliability of the SL system in the unlicensed frequency band can be improved.
  • the channel occupation time is the maximum channel occupation time determined by the second terminal device, or the channel occupation time is shorter than the maximum channel occupation time determined by the second terminal device.
  • the first terminal device may also receive indication information of the channel occupation time from the second terminal device.
  • the second terminal can flexibly indicate the sidelink feedback resources of the channel occupation time according to its own service characteristics, such as delay and data packet size, so as to improve the resource utilization efficiency of feedback.
  • the second frequency domain resource is indicated by a network device, or is preconfigured, or is predefined.
  • the second frequency domain resource includes two discontinuous resource blocks, the frequency domain interval between the two discontinuous resource blocks is Offset resource blocks, and the Offset satisfies: (Offset+ 2)
  • the bandwidth corresponding to the resource blocks is greater than or equal to the product of the bandwidth of the first channel and a first coefficient, and the first coefficient is greater than 0 and less than or equal to 1.
  • the second feedback information may be copy information of the first feedback information, or the second feedback information is a predefined bit stream.
  • the second frequency domain resource is the m th interleaving resource in the first channel
  • the interleaving resource includes at least two resource blocks interleaved in the frequency domain, where m is an integer, and the m greater than or equal to 1, and less than or equal to the total number of interleaving resources included in the first channel, where the value of m is predefined, indicated by the network device, or preconfigured.
  • the first resource block of the second frequency domain resource is the N1th resource block in the first channel
  • the last resource block of the second frequency domain resource is the N1th resource block in the first channel.
  • the first frequency domain resource may be determined according to the index and/or number of interleaving resources corresponding to the time-frequency resource carrying the first data, and the identification information corresponding to the first data .
  • the first terminal device sending the first feedback information on the first frequency domain resource in the feedback time unit includes: the first terminal device transmits the first feedback information according to the first code domain resource at the feedback time unit The first feedback information is sent on the first frequency domain resource in the unit, the first code domain resource is based on the index and/or number of interleaving resources corresponding to the time-frequency resource carrying the first data, and the first data The corresponding identification information is determined.
  • the first terminal device determining the feedback time unit corresponding to the first data within the channel occupation time includes: the first terminal device, according to the time-frequency resource carrying the first data, from The feedback time unit is determined in a time unit set, the time unit set includes at least one time unit, and a time unit in the at least one time unit includes feedback resources.
  • the time domain interval between the starting position of the first time unit in the time unit set and the starting position of the channel occupation time can be X 1 time units, and the time unit The time domain interval between every two adjacent time units in the set may be M1 time units, where X1 and M1 may be predefined, indicated by the network device, or indicated by the second terminal device Or pre-configured, X 1 is a positive integer greater than or equal to 0, and M 1 is a positive integer greater than or equal to 0.
  • the first terminal device may also determine the time unit set from the time units included in the channel occupation time according to the received first indication information, the first indication information comes from the network device or the Second terminal device.
  • the feedback time unit may be the last time unit in the channel occupation time.
  • the fixed position of the PSFCH resource in the channel occupation time saves the overhead of configuration signaling and indication signaling.
  • the first terminal device determines the feedback time unit corresponding to the first data within the channel occupation time, including: when the channel occupation time is less than a time threshold, the feedback time unit may be The channel occupies the last time unit in time.
  • a communication method is provided.
  • the communication method can be performed by the second terminal device.
  • the second terminal device includes the second terminal device or a component in the second terminal device.
  • the second terminal device may be a data sender in V2X communication.
  • the components in the second terminal device may be, for example, a processor loaded in the data sending end, a vehicle communication module, a chip or a chip system, and the like.
  • the second terminal device supports PC5 interface communication.
  • the method provided by the second aspect includes that the second terminal device can access the first channel, and send the first data to the first terminal device.
  • the second terminal device may determine a feedback time unit within the channel occupation time, and the feedback time unit corresponds to the first data.
  • the second terminal device may receive first feedback information on the first frequency domain resource in the feedback time unit.
  • the first feedback information is an acknowledgment or negative response to the first data
  • the first frequency domain resource is determined according to the time-frequency resource carrying the first data.
  • the second terminal device may also receive and discard second feedback information, the second feedback information is carried in the second frequency domain resource in the feedback time unit, the first frequency domain resource and the The second frequency domain resource belongs to the first channel, and the first frequency domain resource does not overlap with the second frequency domain resource.
  • the second frequency domain resource may be indicated by a network device, or preconfigured, or predefined.
  • the second frequency domain resource may include two discontinuous resource blocks, the frequency domain interval between the two discontinuous resource blocks is Offset resource blocks, and the Offset satisfies: (Offset The bandwidth corresponding to +2) resource blocks is greater than or equal to the product of the bandwidth of the first channel and a first coefficient, where the first coefficient is greater than 0 and less than or equal to 1.
  • the second feedback information may be copy information of the first feedback information, or the second feedback information is a predefined bit stream.
  • the second frequency domain resource is the m th interleaving resource in the first channel
  • the interleaving resource includes at least two resource blocks interleaved in the frequency domain, where m is an integer, and the m greater than or equal to 1, and less than or equal to the total number of interleaving resources included in the first channel, where the value of m is predefined, indicated by the network device, or preconfigured.
  • the first resource block of the second frequency domain resource is the N1th resource block in the first channel
  • the last resource block of the second frequency domain resource is the N1th resource block in the first channel.
  • the channel occupation time may be the maximum channel occupation time determined by the second terminal device, or the channel occupation time is shorter than the maximum channel occupation time determined by the second terminal device.
  • the second terminal device may also send indication information of the channel occupation time to the first terminal device.
  • the first frequency domain resource may be determined according to the index and/or number of interleaving resources corresponding to the time-frequency resource carrying the first data, and the identification information corresponding to the first data .
  • the second terminal device receiving the first feedback information on the first frequency domain resource in the feedback time unit includes: the second terminal device may, according to the first code domain resource, in the feedback The first feedback information is received on the first frequency domain resource in the time unit, where the first code domain resource is based on the index and/or number of interleaving resources corresponding to the time-frequency resource carrying the first data, and the first The identification information corresponding to the data is determined.
  • the second terminal device determining the feedback time unit corresponding to the first data within the channel occupation time includes: the second terminal device may, according to the time-frequency resource carrying the first data, The feedback time unit is determined from a time unit set, the time unit set includes at least one time unit, and a time unit in the at least one time unit includes feedback resources.
  • the time domain interval between the starting position of the first time unit in the time unit set and the starting position of the channel occupation time can be X 1 time units, and the time unit The time domain interval between every two adjacent time units in the set may be M1 time units, where X1 and M1 may be predefined, indicated by the network device, or indicated by the second terminal device Or pre-configured, X 1 is a positive integer greater than or equal to 0, and M 1 is a positive integer greater than or equal to 0.
  • the second terminal device may also send first indication information to the first terminal device, where the first indication information is used by the first terminal device to determine from the time unit included in the channel occupation time The collection of time units.
  • the second terminal device may also determine the set of time units from the time units included in the channel occupation time according to received second indication information, where the second indication information comes from a network device.
  • the feedback time unit may be the last time unit in the channel occupation time.
  • the first terminal device determines the feedback time unit corresponding to the first data within the channel occupation time, including: when the channel occupation time is less than a time threshold, the feedback time unit may be The channel occupies the last time unit in time.
  • the embodiment of the present application provides a communication device that can implement the method implemented by the first terminal device in the first aspect or any possible design thereof.
  • the apparatus comprises corresponding units or components for performing the method described above.
  • the units included in the device may be implemented by software and/or hardware.
  • the device may be, for example, a first terminal device, or a component or chip, a chip system, a vehicle communication module or a processor that can support the implementation of the above method in the first terminal device.
  • the communication device may include modular components such as a transceiver unit (or a communication module, a transceiver module) and a processing unit (or a processing module), and these modules may implement the above-mentioned first aspect or any possible design thereof The corresponding function of the first terminal device in .
  • the transceiver unit may be a sending unit when performing the sending step
  • the transceiver unit may be a receiving unit when performing the receiving step
  • the transceiver unit may be replaced by a transceiver
  • the sending unit may be replaced by a transmitter
  • the receiving unit can be replaced by a receiver.
  • the transceiver unit may include an antenna and a radio frequency circuit, etc., and the processing unit may be a processor, such as a baseband chip.
  • the transceiver unit may be a radio frequency unit, and the processing unit may be a processor.
  • the transceiver unit may be an input and output interface of the chip system, and the processing unit may be a processor of the chip system, for example: a central processing unit (central processing unit, CPU).
  • the transceiver unit may be used to perform the receiving and/or sending actions performed by the first terminal device in the first aspect or any possible design thereof.
  • the processing unit may be used to perform actions other than receiving and sending performed by the first terminal device in the first aspect or any possible design thereof.
  • the communication device may include a transceiver module and/or a communication module.
  • the communication device may include a processor and/or a transceiver.
  • the communications device may also include memory.
  • the embodiment of the present application provides a communication device that can implement the method implemented by the second terminal device in the first aspect or any possible design thereof.
  • the apparatus comprises corresponding units or components for performing the method described above.
  • the units included in the device may be implemented by software and/or hardware.
  • the device may be, for example, a second terminal device, or a chip, a chip system, a vehicle communication module, or a processor that can support the implementation of the above method in the second terminal device.
  • the communication device may include modular components such as a transceiver unit (or a communication module, a transceiver module) and a processing unit (or a processing module), and these modules may implement the above-mentioned first aspect or any possible design thereof corresponding function of the second terminal device in the
  • the transceiver unit may be a sending unit when performing the sending step
  • the transceiver unit may be a receiving unit when performing the receiving step
  • the transceiver unit may be replaced by a transceiver
  • the sending unit may be replaced by a transmitter
  • the receiving unit can be replaced by a receiver.
  • the transceiver unit may include an antenna and a radio frequency circuit, etc., and the processing unit may be a processor, such as a baseband chip.
  • the transceiver unit may be a radio frequency unit, and the processing unit may be a processor.
  • the transceiver unit may be an input-output interface of the system-on-a-chip, and the processing unit may be a processor of the system-on-a-chip, such as a CPU.
  • the transceiver unit may be used to perform the receiving and/or sending actions performed by the second terminal device in the first aspect or any possible design thereof.
  • the processing unit may be used to perform actions other than receiving and transmitting performed by the second terminal device in the first aspect or any possible design thereof.
  • the communication device may include a transceiver module and/or a communication module.
  • the communication device may include a processor and/or a transceiver.
  • the communications device may also include memory.
  • a communication system in a fifth aspect, includes the communication devices shown in the third aspect and the fourth aspect.
  • a computer-readable storage medium which is used for storing computer instructions or programs, and when the computer instructions or programs are run on a computer, the computer is made to perform the above-mentioned first to second aspects.
  • a computer program product which, when running on a computer, causes the computer to execute the method described in the first aspect to the second aspect or any possible design thereof.
  • a circuit is provided, the circuit is coupled to a memory, and the circuit is used to execute the method described in the first aspect to the second aspect or any possible implementation manner thereof.
  • the circuit may include a circuit on a chip, a chip or a system on a chip, and the like.
  • beneficial effects of the above second to eighth aspects and their possible designs can refer to the beneficial effects of the first aspect and their possible designs.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of another communication system provided by an embodiment of the present application.
  • FIG. 3A is a schematic diagram of the corresponding relationship between physical time slots and logical time slots provided by the embodiment of the present application;
  • FIG. 3B is a schematic structural diagram of an interleaving resource provided in an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a position of a PSFCH resource provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a PSFCH resource determination method provided in an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of the position of a feedback time unit provided by the embodiment of the present application.
  • FIG. 10 is a schematic diagram of the position of another feedback time unit provided by the embodiment of the present application.
  • Fig. 11 is a schematic diagram of the location of another feedback time unit provided by the embodiment of the present application.
  • FIG. 12 is a schematic diagram of a location of a second frequency domain resource provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of the location of another second frequency domain resource provided by the embodiment of the present application.
  • FIG. 14 is a schematic diagram of locations of a first frequency domain resource and a second frequency domain resource provided by an embodiment of the present application;
  • FIG. 15 is a schematic diagram of a position of a first frequency domain resource provided by an embodiment of the present application.
  • a terminal device such as a terminal device, or a module for implementing functions of the terminal device, such as a system-on-a-chip, and the system-on-a-chip may be set in the terminal device.
  • Terminal equipment includes equipment that provides data connectivity to users, specifically, includes equipment that provides data connectivity to users, or includes equipment that provides data connectivity to users. Examples may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem.
  • the terminal device can communicate with the core network via a radio access network (radio access network, RAN), exchange data with the RAN, or exchange voice and data with the core network.
  • RAN radio access network
  • the terminal equipment may include user equipment (user equipment, UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, vehicle to everything (V2X) communication Terminal equipment, machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment.
  • the terminal device can be a vehicle, ship or aircraft, or a terminal roadside unit, or a communication module or chip built in a vehicle or roadside unit.
  • a network device in a V2X technology is a road side unit (road side unit, RSU).
  • the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications through the PC5 air interface.
  • PC5 interface communication is supported between terminal devices, that is, transmission through a sidelink is supported.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc., which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the various terminal devices described above if they are located on the vehicle, such as placed in the vehicle or installed in the vehicle, can be considered as vehicle-mounted terminal devices.
  • vehicle-mounted terminal device is also called an on-board unit (OBU), for example.
  • OBU on-board unit
  • the terminal device may further include a relay (relay).
  • a relay relay
  • all devices capable of performing data communication with the base station can be regarded as terminal devices.
  • a roadside unit can also be regarded as a terminal device.
  • the communication method provided in the embodiment of the present application may be described by using a terminal device as an example.
  • the party that sends sidelink data such as a transmitting node
  • the party that receives sidelink data such as a receiving node
  • the terminal device receiving the sidelink information ie, the receiving node of the sidelink information
  • the terminal device sending the sidelink information ie, the sidelink information receiving node
  • the sending node of the link information is called the second terminal device, or in other words, the first communication device is the sending node of the side feed back information, and the second communication device is the receiving node of the side feed back information, wherein the side feed back information It can be used to indicate the reception status of the sidelink information (including correct reception or erroneous reception) by the first terminal device.
  • the sideline feedback information can be used for data information (including hybrid automatic repeat request (HARQ) response feedback information, such as acknowledgment (acknowledge, ACK) or negative acknowledgment (negative acknowledgment, NACK).
  • HARQ hybrid automatic repeat request
  • channel state indication can also be used to indicate at least one of the following information, for example, energy saving information, resource assistance information (including recommended resources, not recommended resources, resource collision, Resource reservation conflicts, half-duplex conflicts that have occurred in the past or are about to occur in the future, etc.).
  • resource assistance information including recommended resources, not recommended resources, resource collision, Resource reservation conflicts, half-duplex conflicts that have occurred in the past or are about to occur in the future, etc.
  • the sidelink information may include sidelink discovery information (the sidelink discovery information may be carried on a sidelink discovery channel (physical sidelink discovery channel, PSDCH) and/or a physical layer sidelink shared channel (in physical sidelink shared channel, PSSCH), sidelink control information (sidelink control information, SCI) (the SCI is carried in the sidelink control channel (physical sidelink control channel, PSCCH) and/or in PSSCH), sidelink Data information (or data, sidelink data, etc.) (the sidelink data information is carried in the PSSCH), sidelink feedback information (carried in the PSFCH), sidelink synchronization information (carried in the sidelink synchronization block (sidelink- Synchronization signal block, S-SSB) or sideline pilot information (reference signaling) (including demodulation reference symbol (de-modulation reference signal, DMRS), channel state information reference symbol (channel state information reference signal, CSI-RS ), phase-tracking reference signal (phase-tracking reference signal, PTRS), positioning reference symbol (position reference signal).
  • Network equipment for example including access network (access network, AN) equipment, such as a base station, which may refer to equipment in the access network that communicates with terminal devices through one or more cells over the air interface, or for example, a V2X technology
  • AN access network
  • base station which may refer to equipment in the access network that communicates with terminal devices through one or more cells over the air interface, or for example, a V2X technology
  • the network device in is a road side unit (RSU).
  • the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications through the Uu air interface.
  • the network equipment may include an evolved universal terrestrial radio access network node B (E-UTRAN Node B, eNB), a next generation node B (next generation node B, gNB), or may also include a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU) in the cloud access network (cloud radio access network, Cloud RAN) system, the embodiment of the present application is not limited .
  • E-UTRAN Node B evolved universal terrestrial radio access network node B
  • gNB next generation node B
  • gNB next generation node B
  • gNB next generation node B
  • a centralized unit centralized unit, CU
  • DU distributed unit
  • network equipment refers to access network equipment.
  • network equipment and/or access network equipment may be represented by a base station.
  • the device for realizing the function of the network device may be a network device, or a device capable of supporting the network device to realize the function, such as a chip system, and the device may be installed in the network device.
  • the technical solution provided by the embodiment of the present application the technical solution provided by the embodiment of the present application is described by taking the network device as an example for realizing the function of the network device.
  • V2X communication takes V2X communication as an example to describe the lateral communication.
  • V2X communication is aimed at high-speed equipment represented by vehicles, and is the basic and key technology for applications in scenarios where communication delays are very high in the future.
  • the application fields of V2X communication include smart cars, autonomous driving and intelligent transportation systems.
  • typical V2X communication scenarios include vehicle-to-vehicle communication (vehicle to vehicle, V2V), vehicle-to-pedestrian communication (vehicle to pedestrian, V2P), vehicle-to-infrastructure communication (vehicle to infrastructure, V2I) or vehicle-to-network communication (vehicle to network, V2N).
  • the first terminal device and/or the second terminal device may be a vehicle or a vehicle-mounted terminal device located in a vehicle, or the like.
  • one of the first terminal device and the second terminal device may be a vehicle or a vehicle-mounted terminal device located in a vehicle, and the other may be a terminal device carried by pedestrians such as a mobile terminal or a wearable device.
  • one of the first terminal device and the second terminal device may be a vehicle or a vehicle-mounted terminal device located in a vehicle, and the other may be an infrastructure such as an RSU.
  • V2N communication one of the first terminal device and the second terminal device may be a vehicle or a vehicle-mounted terminal device located in a vehicle, and the other may be a base station.
  • the second terminal device can send status information such as its own position and speed, or driving intention information such as turning, merging or reversing, or by Periodic or aperiodic event-triggered information is sent to surrounding terminal devices as lateral data.
  • the second terminal device can also receive sidelink data from other surrounding terminal devices.
  • the second terminal device can also forward the received side data of other terminal devices.
  • sidelink data and/or sidelink feedback information are carried on the PSSCH.
  • V2X communication can support communication scenarios with and without network coverage.
  • the resource allocation mode when the first terminal device transmits through V2X communication may adopt the network device scheduling mode.
  • the resource used by the terminal device to perform sidelink communication through scheduling and sending by the network device may be referred to as an authorized resource or an authorized frequency band.
  • the first terminal device shown by number c in Figure 2 has no network coverage, or even though there is network coverage but the first terminal device does not adopt the network equipment scheduling mode
  • the first terminal device can perform self-selection of resources, that is Resources for sidelink communication are selected from the resource pool, which may be called unlicensed resources or unlicensed frequency bands.
  • time-frequency resources include time-domain resources and/or frequency-domain resources.
  • the time-frequency code resources include at least one of time domain resources, frequency domain resources and code domain resources.
  • the terminal device can receive the system information block (system information block, SIB) of the network equipment, cell-specific radio resource control (radio resource control, RRC) signaling or terminal device user level (UE-specific) RRC signaling to obtain SL resource pool (resource pool) configuration information and/or SL bandwidth part (bandwidth part, BWP) configuration information.
  • End-devices may also use pre-configured SL resource pool configuration information or SL BWP configuration information, for example, when there is no network coverage.
  • the SL resource pool configuration information includes resource pool resource information, and the resource pool resource information is used to indicate the SL resource pool.
  • a resource pool is a collection of time-frequency resources used for sidelink communication between UEs.
  • a resource pool may include code domain resources.
  • the resources in the resource pool are used to include resources for the terminal device to send and receive at least one of the following physical channels, such as PSCCH, PSSCH, PSDCH, PSFCH, or PSBCH, etc.
  • the service types carried by the PSSCH can include unicast, multicast and/or Broadcast communication type.
  • the time domain of the SL resource pool it includes one or more time units, and the time unit can be one or several symbols, one or several time slots (slot), one or several mini-slots (mini-slot), One or several subframes, or one or several frames, etc.
  • One or more time units can be continuous in time or discrete. It should be understood that the time domain units in a resource pool are logically continuous.
  • time slot 1 to time slot 8 are continuous time slots in time, and such time slots are called physical time slots (physical slot).
  • Physical slot Physical slot
  • the continuous time slots (ie, time slot 1', time slot 2', time slot 3' and time slot 4') contained in the resource pool are logically continuous time slots from the resource pool, which are called logically
  • the time slots that are continuous but not necessarily continuous in time are called logical slots.
  • the frequency domain of the SL resource pool it includes one or more frequency domain units.
  • the frequency domain unit can be a resource element (resource element, RE), several REs, a resource block (resource block, RB), and several RBs , a sub channel, and several sub channels.
  • the size of the subchannel means that one subchannel includes one or more continuous or interlaced RBs in the frequency domain, and may be an integer such as 10, 12, 15, 20, 25 or 50.
  • Interleaved RBs are one form of discrete RBs.
  • multiple RBs contained in a channel or a BWP or a resource pool or a subchannel in a resource pool are interleaved, which means that there is at least one interval between any adjacent two RBs contained in the subchannel that does not belong to RB for this subchannel.
  • an interlace resource is defined as: a channel or a BWP or a resource pool or a subchannel in a resource pool may include M interlace resources, where the mth interlace resource (m ⁇ 0,1,...
  • one interleaved resource includes at least 10 interleaved RBs.
  • the number of interleaved RBs included in one interleaving resource may also be less than 10, which is not limited here.
  • the value of M is related to subcarrier spacing (sub carrier spacing, SCS). For example, as shown in FIG. 3B, when using 15 kilohertz (kHz) SCS, the value of M can be 10. Value can be 5.
  • the SL resource pool configuration information may also include PSCCH configuration information, and the PSCCH configuration information includes the number of symbols occupied by the PSCCH in a time slot and the number of RBs occupied by the PSCCH in a subchannel.
  • SL BWP configuration information may include SL resource pool information, which is used to configure the number of resource pools included in the BWP.
  • the SL BWP configuration information may include SL bandwidth information, which is used to indicate the size of the bandwidth for SL communication, for example, indicating that the SL bandwidth is 20 megahertz (MHz).
  • the SL BWP configuration information may also include SL symbol information, which is used to indicate the starting SL symbol position on a time slot and the number of occupied continuous SL symbols.
  • the SL BWP configuration information may also include SL subcarrier spacing and cyclic prefix information, which is used to indicate the subcarrier spacing and cyclic prefix used for SL communication. Cyclic prefix indicates extended cyclic prefix or normal cyclic prefix.
  • the SL BWP configuration information may also include SL resource pool configuration information.
  • time unit In this application, unless the meaning of the time unit is specifically stated, it is described with a time slot, but not limited to the time unit is only a time slot; unless the meaning of the time-frequency domain unit is specified, it is described with a sub-channel, but not limited to the frequency domain Units are subchannels only.
  • terminal devices at the transmitting end access signals in a competitive manner, for example, according to a channel access manner defined by the European Telecommunications Standards Institute (ETSI).
  • ETSI European Telecommunications Standards Institute
  • Competitive access methods mainly include load based equipment (LBE) and frame based equipment (frame based equipment, FBE).
  • LBE and FBE require terminal devices to perform listen before talk (LBT).
  • energy-based detection may be employed when accessing unlicensed frequency bands.
  • Energy-based detection needs to set a detection threshold (energy detection threshold). When the channel energy detected by the terminal device exceeds the detection threshold, it is judged that the channel is busy, and access to the channel is not allowed. When the detected channel energy is lower than the detection threshold, if it lasts for a period of time, such as 34 microseconds ( ⁇ s), backoff is allowed.
  • the size of the backoff window is related to the service priority. The higher the priority, the smaller the backoff window.
  • the terminal device randomly selects a backoff value K in the backoff window for backoff.
  • the K value will be reduced by 1 until the backoff value K is reduced to 0.
  • the LBT process is completed, and the access channel is allowed to communicate.
  • the moment when the backoff value K is reduced to 0 is The moment when the terminal device accesses the channel.
  • the backoff value K is reduced to 0, if the energy detected by the terminal device is higher than the detection threshold, the channel is busy and the backoff is stopped, and the LBT process is not completed at this time.
  • the backoff is resumed, that is, the backoff is resumed according to the backoff value when the backoff was stopped last time.
  • the sidelink communication resources refer to the time-frequency resources in the resource pool for sidelink communication, on which the sending terminal device can send sidelink information.
  • one or more of reference signals such as PSCCH, PSSCH, physical sidelink feedback channel (physical sidelink feedback channel, PSFCH) and demodulation reference signal (demodulation reference signal, DMRS) can be carried on one resource.
  • the time-domain scheduling unit of the sidelink resource can be a time slot or a mini-slot
  • the frequency-domain scheduling unit can be a channel or a sub-channel (sub channel) or an interleaved resource, or it can be continuous (continuous) or One or more RBs interleaved.
  • PSCCH may exist in each subchannel on each slot, for example, the time domain start position of a PSCCH is the second symbol used for sidelink communication on each slot the starting moment of .
  • the symbol may be an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol (symbol).
  • OFDM orthogonal frequency division multiplexing
  • the number of consecutive symbols occupied by the PSCCH can be determined by resource pool configuration information or SL BWP configuration information, for example, 1 or 2 or 3 symbols and other symbols not exceeding 14 symbols.
  • the starting position of PSCCH in the frequency domain is the physical resource block (PRB) with the smallest index (index) in each subchannel, and the number of RBs occupied by PSCCH can be determined by SL resource pool configuration information or SL BWP configuration information, for example, The number of RBs that does not exceed the size of one channel or one subchannel.
  • each time slot may also include symbols for carrying automatic gain control (automatic gain control, AGC) information, for example, symbols for carrying AGC information are in each time slot the first symbol of .
  • AGC automatic gain control
  • PSFCH is used to carry HARQ feedback information, that is, to carry ACK or NACK feedback information.
  • the UE at the receiving end of the data feeds back to the UE at the sending end of the data according to whether the received data is decoded correctly.
  • the method for determining the time-frequency resource of the PSFCH of the current NR releases (release) 16 and 17 is introduced below with reference to FIG. 5 .
  • the first terminal device determines the resource for sending the sidelink feedback information, that is, PSFCH Resources are jointly determined by the following parameters:
  • Resource configuration information of the resource pool including configuration information of the number of sub-channels included in the resource pool, and configuration information of the number of RBs included in one sub-channel.
  • PSFCH Period N 2 in FIG. 5 (N can also be equal to 0, 1 or 4), which means that there is one PSFCH resource in every 2 time slots.
  • the PSFCH resource can be located in the penultimate symbol and the penultimate symbol of an SL time slot, wherein the penultimate symbol can be used for the receiving end of the PSFCH to perform AGC training.
  • Frequency domain resources of PSFCH resources in the resource pool that is, which RBs in the resources can be used for PSFCH transmission
  • PSFCH transmission includes but not limited to HARQ response feedback (ie, ACK or NACK feedback).
  • the code domain resource of the PSFCH resource in the resource pool that is, how many different PSFCH sequences can be multiplexed on one RB, specifically, it is reflected in the cyclic shift (cyclic shift, CS) value of the generated PSFCH sequence.
  • CS cyclic shift
  • two different CS values may be a pair (pair), and a pair of CS is an ACK sequence and a NACK sequence respectively.
  • the PSFCH sequence may be a ZC sequence.
  • the mapping relationship between the time-frequency resources for receiving PSSCH and the corresponding PSFCH resources is determined according to the following method: for a PSFCH time domain period, all resources that meet the PSFCH gap and can be mapped in the PSFCH time domain period PSFCH resources (PSFCH resources refer to the PSSCH time-frequency resources in which the interval between PSFCH time slot and PSSCH time slot is not less than PSFCH gap k time slots, the first time slot with PSFCH resource) is performed in the first time domain (such as time Slots are sorted according to the index from small to large) and PSSCH resources in the frequency domain (such as subchannels are sorted from small to large).
  • the PSFCH resource sorting is performed first in the frequency domain and then in the code domain.
  • the sorted PSSCH resources and the sorted PSFCH resources are mapped, that is, any PSSCH time-frequency resource corresponds to a unique PSFCH time-frequency code resource.
  • the positions of the PSFCH resources corresponding to PSSCH1 and PSSCH2 are indicated by arrows in FIG. 5 , and the PSFCH resources corresponding to PSSCH1 and PSSCH2 occupy only one RB in the frequency domain.
  • the occupied channel bandwidth (occupied channel bandwidth, OCB) should be between 80% and 100% of the nominal channel bandwidth.
  • This requirement is called OCB requirements, where the nominal channel bandwidth (nominal channel bandwidth) is the widest frequency band allocated to a single channel, including guard bands.
  • the occupied channel bandwidth is the bandwidth that contains 99% of the signal power.
  • the nominal channel bandwidth of a single working channel shall be 20 megahertz (MHz). If it is an equipment smart antenna system with multiple transmission chains, each transmission chain of the communication system should meet the OCB requirements.
  • the OCB requirement may be 75% or more of the nominal channel bandwidth. Occupied channel bandwidth may vary with time and/or payload.
  • the receiving node of the data feeds back to the sending node of the data according to whether the received data is correctly decoded, wherein the data is carried on a physical sidelink shared channel (physical sidelink shared channel, PSSCH).
  • a physical sidelink shared channel physical sidelink shared channel, PSSCH.
  • the embodiment of the present application provides a communication method to provide a PSFCH transmission method applicable to an unlicensed frequency band.
  • the communication method may be implemented by the first communication device and/or the second communication device.
  • FIG. 6 shows a schematic structural diagram of a possible first terminal device and/or second terminal device, and the structure may include a processing module 610 and a transceiver module 620 .
  • the structure shown in FIG. 6 may be a terminal device, or a chip applied in a terminal device, or other combined devices, components or components having functions of the terminal device shown in this application.
  • the transceiver module 620 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc.
  • the processing module 610 may be a processor, such as a baseband processor, which may include one or more central Processing unit (central processing unit, CPU).
  • CPU central processing unit
  • the transceiver module 620 may be a radio frequency unit, and the processing module 610 may be a processor, such as a baseband processor.
  • the transceiver module 620 may be an input and output interface of a chip, such as a baseband chip, and the processing module 610 may be a processor of the chip system, and may include one or more central processing units.
  • the processing module 610 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component
  • the transceiver module 620 may be implemented by a transceiver or a transceiver-related circuit component.
  • the processing module 610 may be used to perform all operations performed by the first terminal device and/or the second terminal device in any embodiment of the present application except for the transceiving operation, such as processing operations, and/or for supporting Other processes of the technology described herein include generating messages, information and/or signaling sent by the transceiver module 620 and processing messages, information and/or signaling received by the transceiver module 620 .
  • the transceiver module 620 may be used to perform all receiving and sending operations performed by the first terminal device and/or the second terminal device in any embodiment of the present application, and/or other processes for supporting the technology described herein, For example the sending and/or receiving of data.
  • the transceiver module 620 may be a functional module, and the functional module can complete both the sending operation and the receiving operation.
  • the transceiver module 620 may be used to perform all sending operations and Receiving operation, for example, when performing sending operation, it can be considered that the transceiver module 620 is a sending module, and when performing a receiving operation, it can be considered that the transceiver module 620 is a receiving module; perhaps, the transceiver module 620 can also be two functional modules, the transceiver Module 620 can be regarded as a general term for these two functional modules, the two functional modules are respectively a sending module and a receiving module, and the sending module is used to complete the sending operation, for example, the sending module can be used to perform For all sending operations performed by the second terminal device, the receiving module is used to complete the receiving operation, and the receiving module may be used to perform all receiving operations performed by the first terminal device and/or the second terminal device.
  • FIG. 7 shows a schematic structural diagram of another terminal device, which is used to perform the actions performed by the first terminal device and/or the second terminal device provided in the embodiment of the present application. Easy to understand and easy to illustrate.
  • the terminal device may include a processor, a memory, a radio frequency circuit, an antenna and/or an input and output device.
  • the processor is mainly used to process communication protocols and communication data, control terminal devices, execute software programs, process data of software programs, and the like.
  • Memory is primarily used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 7 only one memory and processor are shown in FIG. 7 . In an actual terminal device product, there may be one or more processors and one or more memories.
  • a memory may also be called a storage medium or a storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit having a transceiver function may be regarded as a transceiver unit of the terminal device.
  • the transceiver unit may be a functional unit capable of transmitting and receiving functions; or, the transceiver unit may also include two functional units, namely a receiving unit capable of receiving and a transmitting unit capable of transmitting.
  • a processor having a processing function can be regarded as a processing unit of a terminal device.
  • the terminal device includes a transceiver unit 710 and a processing unit 720 .
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, and the like.
  • a processing unit may also be called a processor, a processing board, a processing module, a processing device, and the like.
  • the device in the transceiver unit 710 for realizing the receiving function can be regarded as a receiving unit
  • the device in the transceiver unit 710 for realizing the sending function can be regarded as a sending unit, that is, the transceiver unit 710 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes also be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit, etc.
  • the sending unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the transceiver unit 710 may correspond to the transceiver module 620 , or in other words, the transceiver module 620 may be implemented by the transceiver unit 710 .
  • the transceiver unit 710 is used to perform the sending and receiving operations of the first terminal device and/or the second terminal device in the embodiments shown in this application, and/or other processes for supporting the technologies described herein.
  • the processing unit 720 may correspond to the processing module 610 , or in other words, the processing module 610 may be realized by the processing unit 720 .
  • the processing unit 720 is used to perform other operations of the first terminal device and/or the second terminal device in the embodiment shown in this application except the transceiving operation, for example, to perform Or all operations performed by the second terminal device except receiving and transmitting, and/or other processes used to support the techniques described herein.
  • the structures shown in FIG. 6 and/or FIG. 7 may also be used to implement network devices or components of network devices, such as base stations, CUs or DUs.
  • the processing module 610 shown in FIG. 6 and/or the processing unit 720 shown in FIG. 7 can be used to implement the processing steps performed by the base station in the communication method provided by the embodiment of the present application and/or other than the receiving and sending performed by the base station operation.
  • the transceiver module 620 shown in FIG. 6 and/or the transceiver unit 710 shown in FIG. 7 can be used to implement the receiving operation and/or sending operation performed by the base station in the communication method provided by the embodiment of the present application.
  • the structure shown in FIG. 7 is used to implement a network device, the structure may not include input and output devices.
  • the network device or a component of the network device may be referred to as a third communication device.
  • first terminal device and/or the second terminal device are implemented by the structure shown in FIG. 6 and/or FIG.
  • the receiving and sending actions performed by the device can be performed by the transceiver module 620 shown in Figure 6 and/or the transceiver unit 710 shown in Figure 7; in the communication method provided by the embodiment of this application, the first terminal device and/or the second terminal
  • the processing actions performed by the device, and other actions except the receiving and sending actions may be performed by the processing module 610 shown in FIG. 6 and/or the processing unit 720 shown in FIG. 7 .
  • the network device or the components in the network device are realized by the structure shown in FIG. 6 and/or FIG.
  • the receiving and sending actions performed by the network device in the communication method provided by the embodiment of the present application can be performed by the transceiver module shown in FIG. 6 620 and/or executed by the transceiver unit 710 shown in FIG. 7; the processing actions performed by the network device in the communication method provided by the embodiment of the present application, and other actions except receiving and sending actions can be performed by the processing module 610 shown in FIG. and/or executed by the processing unit 720 shown in FIG. 7 .
  • the communication method provided by the embodiment of the present application may include the following steps shown in S101 to S103:
  • a second terminal device accesses a first channel, and sends first data.
  • the access channel in this application means that the terminal device completes the LBT on the channel, or the LBT is successful.
  • the backoff value K of the terminal device is reduced to 0 during the LBT process of the channel.
  • the first terminal device receives the first data from the second terminal device.
  • the first data is carried on the PSSCH.
  • the second terminal device may send sidelink control information through the PSSCH after accessing the first channel, and the sidelink control information may be used to schedule the first data.
  • the first terminal device After detecting the lateral control information from the second terminal device, the first terminal device receives the first data according to the lateral control information.
  • S101 may be performed by the transceiver module 620 .
  • S101 may be performed by the transceiver unit 710 .
  • the first terminal device determines a feedback time unit within the channel occupation time, where the feedback time unit corresponds to the first data.
  • the feedback time unit corresponding to the first data means that the feedback time unit may include feedback resources for carrying the feedback information corresponding to the first data, or in other words, some or all of the resources in the feedback time unit may be used to send
  • the feedback information corresponding to the first data has implemented HARQ response feedback for the first data.
  • feedback resources refer to time-frequency resources that can be used by a terminal device to send feedback information.
  • the channel occupancy time here may be determined by the second terminal device.
  • the channel occupancy time may be a maximum channel occupancy time (maximum channel occupancy time, MCOT) determined by the second terminal device, and MCOT is the maximum time that the second terminal device can occupy the first channel.
  • the channel occupancy time is the time when the second terminal device actually occupies the first channel, which is called channel occupancy time (channel occupancy time, COT). At this time, the channel occupancy time may be less than or equal to the maximum occupancy time.
  • the second terminal device may send indication information of the channel occupation time to the first terminal device, and the first terminal device may determine the channel occupation time according to the indication information.
  • the second terminal device accesses the first channel, it determines a value smaller than the MCOT as the COT according to the MCOT, and controls the element (control element, CE) through the sideline control information or the media access control (media access control, MAC) Or PC5RRC signaling indicates the COT to the first terminal device, including indicating the starting position of the COT (for example, the time slot or symbol where the COT starts) and/or the duration of the COT (the unit can be ms or time slot or symbol) , the first terminal device takes the COT as the channel occupancy time.
  • the second terminal device accesses the channel, it indicates the MCOT to the first terminal device through the sidelink control information or the MAC control element or the sidelink RRC information, and the first terminal device uses the MCOT as the channel occupancy time.
  • S102 may also be replaced by: the first terminal device determines the feedback time unit within the MCOT, or the first terminal device determines the feedback time unit within the COT.
  • the MCOT depends on a channel access priority class, and the channel access priority class is determined by the terminal device according to the service type or service quality level of the data to be transmitted.
  • the corresponding relationship between the channel access level and the MCOT is shown in Table 1, for example.
  • channel access level MCOT 1 2 milliseconds (ms) 2 4ms 3 6ms or 10ms 4 6ms or 10ms
  • the first terminal device may determine the number of time slots included in the channel occupation time according to the channel occupation time and the subcarrier spacing information.
  • the number of time slots can satisfy:
  • N slot T ⁇ 2 ⁇ ;
  • N slot is the number of time slots
  • T is the channel occupancy time
  • ⁇ subcarrier spacing information
  • the first terminal device may determine the feedback time unit from a set of time units within the channel occupation time.
  • the time unit set may include at least one time unit, and a time unit in the time unit set includes feedback resources.
  • a feedback time unit may belong to a SL resource pool.
  • one time unit is taken as one time slot as an example for illustration, and a time unit may also be defined as n time slots in practical applications, where n is greater than 0.
  • the initial time slot of a set of time units in a COT or MCOT can be defined as the 1st time slot of PSFCH in the channel occupation time, then this time slot can be written as
  • the time domain interval between the first time slot of the PSFCH and the initial position of the channel occupation time is X 1 (or denoted as ) timeslots.
  • the time domain interval here refers to the number of time slots between the first time slot of the PSFCH and the starting position of the channel occupation time.
  • the location of PSFCH 1 in a COT or MCOT can be predefined, and the predefined includes those defined in communication standard protocols or communication specifications, and do not need to be obtained through signaling or configuration or calculation
  • the value of X 1 is 0, 1, 2, 3, 4, 5, or 6, etc., which is a positive integer that does not exceed the total number of time slots corresponding to the COT duration.
  • X1 may be pre - configured, or X1 is indicated or configured by the network device to the first terminal device through downlink control information (DCI) or RRC signaling or SIB information or MIB information, or X 1 is indicated or configured by the second terminal device to the first terminal device through SCI or PC5 RRC signaling.
  • DCI downlink control information
  • RRC signaling SIB information or MIB information
  • X 1 is indicated or configured by the second terminal device to the first terminal device through SCI or PC5 RRC signaling.
  • the time domain interval between every two adjacent time units in the time unit set is M 1 time slots.
  • the value of M 1 can be predefined, such as 1, 2, 3 or 4, etc., or M 1 is a pre-configured value, or M 1 is indicated by the network device through DCI or RRC signaling or SIB information or MIB information Or configured to the first terminal device, or, M 1 may be indicated or configured to the first terminal device by the second terminal device through SCI or PC5RRC signaling.
  • Adjacent time units in the time unit set refer to two logically adjacent time units in the time unit set. These two time units are not necessarily physically adjacent. For example, as shown in Figure 9, in the time unit set There are M 1 time slots not including feedback resources between two adjacent time units, and M 1 is the time domain interval between two adjacent time units.
  • the first terminal device can determine that during the channel occupation time, except for the 1st PSFCH time slot, the numbers of other time slots in the time unit set are in,
  • the last time slot included in the time unit set may also be defined as the 2th PSFCH time slot in the channel occupation time.
  • the time domain interval between the 2nd time slot of the PSFCH and the end position of the channel occupancy time is X2 (or denoted as ) timeslots.
  • the location of PSFCH 2 can be predefined, for example, the value of X 2 is N slot , N slot -1, N slot -2, N slot -3, or N slot -4, etc., or X 2 is a preset Allocation, or X2 is indicated or configured to the first terminal device by the network device through DCI or RRC signaling or SIB information or MIB information, or X2 is indicated or configured to the first terminal device by the second terminal device through SCI or PC5RRC signaling terminal device.
  • the first terminal device can determine that during the channel occupation time, except for the 2nd PSFCH time slot, the numbers of other time slots in the time unit set are in,
  • the time unit included in the time unit set may be indicated or configured by the network device to the first terminal device through DCI or RRC signaling or SIB information or MIB information, or indicated or configured by the second terminal device to the second terminal device through SCI or PC5 RRC signaling. a terminal device.
  • the first terminal device may receive first indication information from the network device or the second terminal device, and the first indication information may be used to indicate the time units included in the time unit set.
  • the first indication information may include a bitmap (bitmap).
  • bitmap bitmap
  • a PSFCH resource pattern (pattern) within the channel occupation time may be defined, and the pattern may be represented by the bitmap.
  • the bitmap can be expressed as L bitmap is the length of the bitmap.
  • the value of the L bitmap can be predefined, or a pre-configured value, or indicated or configured to the first terminal device by the network device through DCI or RRC signaling or SIB information or MIB information, or by the second terminal device through The SCI or PC5 RRC signaling indicates or configures the first terminal device.
  • L bitmap N slot as shown in Figure 10, that is to say, the value of each bit in the bitmap indicates whether a time slot within the channel occupation time is the time included in the time unit set unit.
  • the first terminal device may determine the time unit set by means of a predefined or preconfigured time unit included in the time unit set.
  • the time unit in the predefined time unit set is the last time slot in the channel occupation time, or other time slots. If the time unit in the time unit set is the last time slot in the channel occupation time, the feedback time unit at this time is the time slot.
  • the first terminal device may determine the set of time units according to the length of the channel occupation time.
  • the time unit in the default time unit set is the last time slot in the channel occupancy time, or other time slots. If the time unit in the time unit set is the last time slot in the channel occupation time, the feedback time unit at this time is the time slot.
  • the threshold can be a length of time, such as X ms, or the threshold can be the length of X' time slots.
  • the value of X and/or X' may be predefined, or a pre-configured value, or be indicated or configured to the first terminal device by the network device through DCI or RRC signaling or SIB information or MIB information, Or the second terminal device indicates or configures to the first terminal device through SCI or PC5RRC signaling.
  • the time units in the default time unit set include the last time slot and an odd or even time slot in the middle of the channel occupation time.
  • the above manners 1 to 4 are only exemplary descriptions, and should not be understood as all implementation manners for determining the set of time units.
  • the above methods 1 to 4 can also be implemented in combination with each other.
  • the time unit in the default time unit set is the channel occupancy time.
  • the time unit in the time unit set can be determined in any one of ways 1 to 3 or 4.
  • the first terminal device may determine the feedback time unit according to the time-frequency resource carrying the first data. For example, after determining that the time unit set includes a plurality of time units, determine the time unit that meets the time domain interval requirement between PSFCH and PSSCH as the feedback time unit. Let me repeat.
  • the unit of the time domain interval may be a time slot, for example, the time domain interval is 1, 2 or 3 time slots.
  • the value of the time domain interval may be predefined, or a pre-configured value, or indicated or configured to the first terminal device by the network device through DCI or RRC signaling or SIB information or MIB information, or by the second terminal device
  • the device indicates or configures the first terminal device through SCI or PC5RRC signaling.
  • the above feedback time unit and/or time unit set can also be periodically configured by SL BWP configuration information and/or SL resource pool configuration information.
  • S102 may be executed by the processing module 610 .
  • S102 may be executed by the processing unit 720 .
  • the second terminal device may determine a feedback time unit within the channel occupation time.
  • the feedback time unit corresponds to the first data.
  • the second terminal device determines the feedback time unit within the MCOT, or the second terminal device determines the feedback time unit within the COT.
  • the present application does not limit the execution timing of determining the feedback time unit within the channel occupation time and the execution timing of S102 by the second terminal device.
  • the second terminal device may execute the action of determining the feedback time unit after sending the first data, and the first terminal device may execute S102 after receiving the first data.
  • the second terminal device determines a feedback time unit corresponding to the first data before receiving the first feedback information and/or the second feedback information, so as to receive the feedback information correctly.
  • the channel occupation time is the maximum channel occupation time determined by the second terminal device, or is less than the maximum channel occupation time determined by the second terminal device.
  • the channel occupancy time may be determined by the second terminal device, for details, refer to the description in S102.
  • the indication information of the channel occupation time may be sent by the second terminal device to the first terminal device, so as to indicate the channel occupation time determined by the second terminal device.
  • the first terminal device may determine the feedback time unit from a set of time units within the channel occupation time.
  • the way of determining the time unit set can refer to the way of determining the time unit set in S102.
  • At least one of X 1 , X 2 and M 1 may be pre-configured, or X 1 is a network device through DCI or RRC Signaling or SIB information or MIB information indicates or configures to the second terminal device, or at least one of X 1 , X 2 and M 1 may be determined by the second terminal device and indicated or configured through SCI or PC5RRC signaling for the first terminal device.
  • X 1 , X 2 and M 1 refer to the description of mode 1 in S102.
  • the time unit included in the time unit set may be indicated or configured to the second terminal device by the network device through DCI or RRC signaling or SIB information or MIB information, or Determined by the second terminal device and indicated or configured to the first terminal device through SCI or PC5RRC signaling.
  • the second terminal device may receive the second indication information from the network device, and determine the feedback time unit from the time units included in the channel occupation time according to the second indication information.
  • the second indication information is, for example, a bitmap. For the way of indicating the set of time units through the bitmap, reference may be made to the description in way 2.
  • the second communication device may determine the time unit set by predefining or preconfiguring the time units included in the time unit set.
  • the second communication device may determine the time unit set according to the length of the channel occupation time, for example, when the channel occupation time is less than or equal to the time threshold, the second terminal device defaults to The time unit in the time unit set is the last time slot in the channel occupation time.
  • the second terminal device can determine the feedback time unit according to the time-frequency resource carrying the first data. For example, the second terminal device can determine that the time unit between PSFCH and PSSCH is satisfied. The time unit required by the domain interval is used as the feedback time unit.
  • the method for the second terminal device to determine the feedback time unit can refer to the determination of the time unit set by the first terminal device in S102, and send the first indication information to the first terminal device, and the first indication information can be used to indicate the time unit included in the time unit set .
  • the second terminal device may also obtain a periodically configured feedback time unit and/or time unit set according to SL BWP configuration information and/or SL resource pool configuration information.
  • the feedback time unit determined by the second terminal device is the same as the feedback time unit determined by the first terminal device in S102.
  • the action of determining the feedback time unit and/or time unit set may be performed by the processing module 610 .
  • the action of determining the feedback time unit and/or the time unit set can be performed by the processing unit 720 .
  • the first terminal device accesses the first channel, sends the first feedback information on the first frequency domain resource in the feedback time unit, and sends the second feedback information on the second frequency domain resource in the feedback time unit.
  • the first frequency domain resource does not overlap with the second frequency domain resource, or in other words, the first frequency domain resource and the second frequency domain resource do not include the same RB.
  • the first frequency domain resource and the second frequency domain resource belong to the first channel, and the first frequency domain resource is determined according to the time frequency resource carrying the first data.
  • the first feedback information is effective feedback information for the first data, including ACK or NACK, and is used to indicate whether the first data is received correctly.
  • the first feedback information may also include but not limited to CSI feedback information, which is used to indicate the channel state, including pre-coding matrix indicator (pre-coding matrix indicator, PMI) feedback, rank indication (rank indication, RI) feedback, Channel quality indicator (channel quality indicator, CQI) feedback, etc.
  • the first feedback information may also include energy saving information, such as wake-up indication information or sleep indication information, the wake-up indication information may be used to wake up the UE to receive at least PSCCH information, and the sleep indication information may indicate that the UE may enter a sleep state and not receive PSCCH information.
  • the first feedback information may also include resource assistance information, resource assistance confidence, for example, information indicating recommended resources, information indicating resources that are not recommended, information indicating resource collisions, and information indicating resource reservation conflicts. information, or information indicating that a half-duplex collision has occurred in the past or is about to occur in the future.
  • effective feedback information means that the feedback information is at least used to indicate the receiving end of the sidelink information for the reception of the sidelink information, and the feedback information requires the sending end of the sidelink information to to receive.
  • the second feedback information may be copy information of the first feedback information, or may carry fixed information (or in other words, the second feedback information may be one of predefined bits), for example, the second feedback information is "0" or "1". Or other information that does not have practical significance, because the occupancy of the second frequency domain resources is to meet the OCB requirements of the unlicensed frequency band, and it only needs to be transmitted according to a certain power.
  • the second feedback information may be referred to as invalid feedback information. Invalid feedback information means that the feedback information is only used to occupy the channel, so the sender of the sidelink information may not receive and/or receive and discard the feedback information.
  • the first terminal device even if the first terminal device does not need to send the first feedback information in the second frequency domain resource, it still needs to send the second feedback information in the second frequency domain resource.
  • the purpose is to occupy the first feedback information in the COT. to prevent the first channel from being preempted by other users.
  • the first terminal device accesses the first channel, and sends the second feedback information on the second frequency domain resource of each time unit in the time unit set, and the time unit in each time unit includes Feedback resources.
  • Situations that do not require the first feedback information include at least one of the following: in the HARQ feedback mechanism with only NACK feedback, the first terminal device correctly receives the first data, and the first terminal device discards the first feedback information because of priority (that is, the first The terminal device needs to send other information with higher priority and discards the first feedback information), or the first terminal device does not correctly decode the sidelink control information (that is, the first terminal device does not know that the first feedback information needs to be sent), etc.
  • the second frequency domain resource is shared by all terminal devices accessing the first channel for sending the second feedback information, and is not limited to the first terminal device.
  • the first channel here may belong to the SL BWP, the SL resource pool, or a subchannel in the SL resource pool.
  • the SL BWP may be a resource determined according to the SL BWP configuration information.
  • the SL resource pool may be a resource determined according to configuration information of the SL resource pool.
  • the manner of determining the first frequency domain resource and the second frequency domain resource will be described below with reference to the accompanying drawings. Among them, since the first frequency domain resource may be determined according to the second frequency domain resource, the method of determining the second frequency domain resource is first introduced here, but it does not mean that the determination process of the second frequency domain resource is prior to the first frequency domain resource. Resource determination process execution.
  • the second frequency domain resource may include two discontinuous resource blocks, and the frequency domain interval between the two discontinuous resource blocks is Offset resource blocks, and these two resource blocks may be the second frequency domain resources respectively.
  • the frequency domain interval here refers to the number of resource blocks between these two discontinuous resource blocks.
  • the bandwidth corresponding to (Offset+2) resource blocks is greater than or equal to the product of the bandwidth of the first channel and the first coefficient, or in other words, the bandwidth corresponding to the second frequency domain resource is greater than or equal to the bandwidth of the first channel and The product of the first coefficient, wherein the first coefficient is greater than 0 and less than 1.
  • the first coefficient is the minimum proportion of occupying the first bandwidth that satisfies the OCB requirement.
  • the purpose of this design is to enable the first terminal device to send the second feedback information through the second frequency domain resources to meet the requirements of the OCB.
  • the second frequency domain resource may further include at least one resource block between the two discontinuous resource blocks.
  • the second frequency domain resource may be indicated by the network device, or be preconfigured, or predefined. Therefore, the second frequency domain resources can be configured independently of the time-frequency resources of the PSFCH of NR release 16 and 17.
  • the same second frequency domain resource can be configured to multiple terminal devices in a way indicated by network equipment, preconfigured or predefined, so multiple second terminal devices can send the second feedback on the same second frequency domain resource information to realize the occupancy of the same channel by multiple terminal devices.
  • the interleaving resources included in the SL resource pool may be determined, and the resource pool includes the first channel, that is, the frequency domain resources of the resource pool are greater than or equal to the frequency domain resources of the first channel.
  • an SL resource pool may include M subchannels, and one subchannel corresponds to one interleaving resource, that is, the number of subchannels is equal to the number of interleaving resources and there is a one-to-one correspondence between subchannels and interleaving resources, for example, the first subchannel The channel corresponds to the first interleave resource, and so on.
  • the first terminal device may determine the interleaving resources included in the SL resource pool through network device indication, pre-configuration or predefined manner.
  • one SL resource pool includes M interleaved resources. Indexes (or serial numbers or serial numbers) of the interleaving resources in the resource pool are 0 to M-1.
  • an SL resource pool includes N subchannels, and it can be determined that at least one subchannel in the N subchannels includes the first channel, that is, the frequency domain resource of the subchannel is greater than or equal to the frequency domain resource of the first channel, wherein each subchannel The channel includes M interleaving resources, and the index of the interleaving resources in each subchannel is 0 to M-1.
  • the second frequency domain resource is the mth interleaved resource of the first channel
  • the interleaved resource includes at least two resource blocks interleaved in the frequency domain, where m is greater than or equal to 1, and is less than or equal to the first
  • An integer of the total number of interleaving resources in a channel where the value of m is predefined, or a pre-configured value, or is indicated or configured by the network device to the first channel through DCI or RRC signaling or SIB information or MIB information terminal device. Therefore, the network device may instruct the first terminal device to determine the m th interleaving resource of the first channel as the second frequency domain resource, either in a preconfigured manner or in a predefined manner.
  • the interleaving resource #1 is used as the second frequency domain resource.
  • all PRBs included in the interleaving resource #1 in FIG. 12 are the second frequency domain resources, or, the resource blocks with the smallest index and the resource block with the largest index included in the interleaving resource #1 are the second frequency domain resources.
  • the first resource block of the second frequency domain resource may be the N1th (or described as ) resource blocks
  • the N1 resource block may be the N1 resource block marked from the largest or smallest RB index
  • the last resource block of the second frequency domain resource may be the N2th (or described for ) resource blocks
  • the N2 resource block may be the N2 resource block marked from the largest or smallest RB index.
  • N1 and N2 are positive integers
  • the values of N1 and N2 may be predefined, indicated by a network device, or preconfigured.
  • the difference between N1 and N2 is Offset, so the values of N1 and N2 can be used to make the bandwidth corresponding to the second frequency domain resource greater than or equal to the product of the bandwidth of the first channel and the first coefficient.
  • the first resource block of the second frequency domain resource described here may be the resource block with the smallest number when the numbers of the resource blocks are arranged in descending order. It can also be said that the first resource block is the first resource block.
  • the last resource block of the second frequency domain resource may be the resource block with the largest number when the number of the resource blocks is arranged in descending order. It can also be said that the last resource block is the resource block with the highest frequency in the second frequency domain resource. . It can be understood that the size of the number is relative to that in the first channel.
  • the network device may be instructed by the network device, either in a preconfigured manner or in a predefined manner, so that the first terminal device determines that the N1th resource block is the first resource block of the second frequency domain resource and the N2th resource block is The last resource block of the second frequency domain resource.
  • the first resource block of the second frequency domain resource is the resource block with the smallest RB index in the first channel
  • the last resource block of the first frequency domain resource is the RB in the first channel Indexes the largest resource block.
  • the values of N1 and N2 can be equal or different, as long as they meet the requirements of the OCB.
  • the second frequency domain resource may consist of the first PRB and the last PRB in the first channel.
  • the above first feedback information and/or second feedback information occupy the last two symbols of the time slot where the feedback time unit is located.
  • the last symbol of the feedback time unit is a gap symbol
  • the first feedback information and/or the second feedback information occupy the penultimate and penultimate symbols of the time slot where the feedback time unit is located.
  • the first feedback information and/or the second feedback information occupy the first two symbols of the time slot where the feedback time unit is located, as shown in FIG. 14 , taking the feedback time unit as the last time slot of the channel occupation time as an example, the first The first feedback information and/or the second feedback information occupy the first two symbols of the time slot.
  • the first feedback information and/or the second feedback information may also occupy other symbols of the time slot where the feedback time unit is located.
  • the first terminal device may determine the first frequency domain resource according to the index and/or number of interleaving resources corresponding to the time-frequency resource carrying the first data and identifier (identifier, ID) information corresponding to the first data.
  • each time unit set There are feedback resources for time units, and the time units can be time slots.
  • the determination method of can adopt the method of S102, that is, determine the set of time units.
  • the time-frequency resource carrying the first data may include the time slot i where the first data is located in the time domain, In the frequency domain, it can be determined according to the index j and/or the number N interlace of the interlace resource, so the index j and/or the number N interlace can be called the index and/or interlace resource corresponding to the time-frequency resource carrying the first data.
  • the number, wherein, 0 ⁇ j ⁇ N interlace , N interlace represents the number of interleaved resources in a resource pool or in a subchannel.
  • the ID information corresponding to the first data may include source ID information and/or target ID information of the first data.
  • the source ID information of the first data may include the identifier of the second terminal device, the identifier of the terminal device that initiates the service to which the first data belongs, or the identifier of the terminal device that sends the first data.
  • the target ID information of the first data may include the identifier of the first terminal device, the identifier of the terminal device receiving the service to which the first data belongs, or the identifier of the terminal device receiving the first data.
  • ID information may be layer-1 ID information, that is, physical layer ID information, carried in physical layer control signaling such as SCI, including destination ID (destination ID), which is recorded as Dest ID and source ID (source ID) is denoted as Src ID .
  • the ID information may also be layer-2 (layer-2) ID information, that is, MAC layer ID information, carried in the MAC CE, including a destination ID and a source ID.
  • the layer 1 ID information is at least a part of the layer 2 ID information, that is, the layer 2 ID information includes the complete destination ID and source ID, and the layer 1 ID information carries a part of the layer 2 ID information.
  • the length of the layer 2 destination ID is 24 bits
  • the layer 1 destination ID is the first 16 bits of the layer 2 destination ID
  • the length of the layer 2 source ID is 24 bits
  • the layer 1 source ID is the first 8 bits of the layer 2 source ID.
  • the above 8, 16 and 24 bits are just an example, and may be other positive integers in practical applications, as long as the number of bits of the Layer 2 ID (including source ID and destination ID) is greater than or equal to that of the Layer 1 ID.
  • the ID information can be used to identify the terminal device, or in other words, the ID information corresponding to the first data here can be an identification related to the first terminal device and/or the second terminal device; it can also be used to identify data or data service, or in other words, the ID information may be an identifier related to the first data and/or the service to which the first data belongs.
  • the ID information may be allocated by the application (application, APP) layer. From the perspective of the physical layer, each PSSCH may have a corresponding The layer 1 ID information of , is carried in the corresponding SCI.
  • the ID information also includes the UE identifier in the multicast, which means for a multicast service or multicast communication, the unique identifier M ID of the UE in the multicast service or multicast communication.
  • the first terminal device can be based on Time-frequency resources carrying the first data and available code domain resources for the first feedback information Or the set of RB resources that can be used to transmit PSFCH At least one piece of information in the information determines the RB number where the first frequency domain resource is located.
  • the available code domain resources of the first feedback information may be the number of available CS pairs, such as 1, 2, 4 or 6 pairs, and the first terminal device may determine the CS pairs corresponding to the first feedback information from the CS pairs.
  • the RB resource set available for PSFCH transmission may be a possible RB set of the first frequency domain resource and/or the second frequency domain resource.
  • the number of available CS pairs and/or the set of RB resources available for PSFCH transmission may be predefined, or pre-configured, or indicated to the first terminal device by the network device through DCI, RRC signaling or SIB, Or the second terminal device indicates to the first terminal device through SCI or PC5 RRC signaling.
  • the first terminal device may also send the first feedback information on the first frequency domain resource in the feedback time unit according to the first code domain resource, where the first code domain resource is based on The index and/or number of interleaving resources corresponding to the time-frequency resources carrying the first data are determined from the identification information corresponding to the first data.
  • the first terminal device may determine the first code domain resource determined with the first frequency domain resource from the CS pair corresponding to the first feedback information, and use the first code domain resource in the first frequency domain resource in the feedback time unit The first feedback information is sent on the resource.
  • the first terminal device may determine the first frequency domain resource and/or the first code domain resource in the following manner.
  • the first terminal device can be accessed from In the corresponding PRB, according to the principle of first sorting i in ascending order and then sorting j in ascending order, the number is
  • the PRB of is used as the numbering range of the RB where the candidate resource of the first frequency domain resource corresponding to the PSSCH received at the time slot i and subchannel j is located, where i is the time slot where the first data is located, and j is the index of the interleaving resource.
  • the RB is used to feed back the PSSCH received on time slot i and interlace j.
  • the first terminal device can determine the number of PSFCH frequency domain and code domain total resources used to feed back PSSCH optional, Satisfy:
  • PSFCH resource type There are two values for , which can be preconfigured, configured, or predefined. when hour, The interleaving resource with the smallest allocated index associated with the corresponding PSSCH. when hour, All allocated interlace resources associated to the corresponding PSSCH, wherein, is the total number of interleaving resources allocated by the corresponding PSSCH.
  • first resource sorting and numbering are performed to obtain the total PSFCH frequency domain and code domain resources and PSFCH resource numbers.
  • the first resource sorting principle includes the frequency domain first and then the code domain, or the code domain first and then the frequency domain, which is not limited here.
  • ID information referred to as ID
  • the determined PSFCH resource number is used to determine the first frequency domain resource and the first code domain resource, specifically, by The PSFCH resource number is obtained, wherein ID represents the identification information corresponding to the first data, and the first frequency domain resource and the first code domain resource are determined according to the PSFCH resource number and the first resource sorting principle.
  • the RB resource set available for PSFCH transmission in the first channel may not include the second frequency domain resource, and then the PSFCH resource may be used for transmission of the second frequency domain resource.
  • the transmission of the first resource does not belong to PSFCH.
  • the RB resource set that can be used to transmit PSFCH in the first channel includes the first frequency domain resource and the second frequency domain resource, then the PSFCH resource can be used for the transmission of the first feedback information, or can be used for for the transmission of the second feedback information.
  • S101 may be performed by the transceiver module 620 .
  • S101 may be performed by the transceiver unit 710 .
  • the action of determining the first code domain resource, the first frequency domain resource and the second frequency domain resource may be performed by the processing module 610 .
  • the action of determining the first code domain resource, the first frequency domain resource and the second frequency domain resource may be performed by the processing unit 720 .
  • the second terminal device may receive the first feedback information on the first frequency domain resource in the feedback time unit.
  • the first frequency domain resource is determined according to the time-frequency resource carrying the first data.
  • the first feedback information is effective feedback information for the first data, and the description of the first feedback information may refer to the above description.
  • the second terminal device may detect the first feedback information on the first frequency domain resource.
  • the second terminal device determines the first frequency domain resource, and further optionally, the second terminal device may also determine Second frequency domain resource.
  • the second frequency domain resource is used to receive second feedback information, and the second feedback information may be copy information of the first feedback information or a predefined bit stream.
  • the method for the second terminal device to determine the first frequency domain resource can refer to the description of the first terminal device determining the first frequency domain resource in S103, and the method for the second terminal device to determine the second frequency domain resource can refer to the first terminal device determination in S103 Description of the second frequency domain resource.
  • the second frequency domain resource may include two discontinuous resource blocks, and the frequency domain interval between the two discontinuous resource blocks is Offset resource blocks, and these two resource blocks may be the second frequency domain resources respectively The first resource block and the last resource block in .
  • the frequency domain interval here refers to the number of resource blocks between these two discontinuous resource blocks.
  • the bandwidth corresponding to the (Offset+2) resource blocks is greater than or equal to the product of the bandwidth of the first channel and the first coefficient, and the first coefficient is greater than 0 and less than 1.
  • the second frequency domain resource may be indicated by the network device, or be preconfigured, or predefined.
  • the second terminal device determines the m th interleaving resource of the first channel as the second frequency domain resource as instructed by the network device, or in a pre-configured or predefined manner.
  • m refer to the description in S103.
  • the network device indicates, or through pre-configuration or pre-definition, that the second terminal device determines that the N1 resource block is the first resource block of the second frequency domain resource and the N2 resource block is It is the last resource block of the second frequency domain resource, and the meanings of N1 and N2 may refer to the description in S103.
  • the second terminal device may determine the first frequency domain resource according to the index and/or number of interleaving resources corresponding to the time-frequency resource carrying the first data and the ID information corresponding to the first data.
  • the index and number of interleaving resources corresponding to the time-frequency resources carrying the first data, and the ID information corresponding to the first data reference may be made to the description in S103.
  • the second terminal device may also receive the first feedback information on the first frequency domain resource in the feedback time unit according to the first code domain resource, wherein the first code domain resource is based on the The index and/or number of interleaving resources corresponding to the time-frequency resources are determined by the identification information corresponding to the first data.
  • the second terminal device may refer to steps 1) to 3) to determine the first frequency domain resource and/or the first code domain resource.
  • the second terminal device may also receive the second feedback information on the second frequency domain resource in the feedback time unit.
  • the second terminal device may blindly detect the second feedback information on the second frequency domain resource.
  • the second terminal device may discard the second feedback information.
  • the second terminal device also does not detect the second feedback information on the second frequency domain resource.
  • the present application does not limit the execution timing of the second terminal device receiving the first feedback information on the first frequency domain resource in the feedback time unit and the execution timing of S103.
  • the timing relationship between the first terminal device determining the first frequency domain resource and the second terminal device determining the first frequency domain resource is not limited, and the first terminal device determining the second frequency domain resource and the second terminal device determining the second frequency domain resource are not limited. Timing relationship of domain resources.
  • the action of the second terminal device receiving the first feedback information on the first frequency domain resource in the feedback time unit can be performed by the transceiver module 620 .
  • the action of the second terminal device receiving the first feedback information on the first frequency domain resource in the feedback time unit can be performed by the transceiver unit 710 .
  • the action of determining the first code domain resource, the first frequency domain resource and/or the second frequency domain resource may be performed by the processing module 610 .
  • the action of determining the first code domain resource, the first frequency domain resource and/or the second frequency domain resource may be performed by the processing unit 720 .
  • the first terminal device can send feedback information in the first frequency domain resource and the second frequency domain resource in the feedback time unit, wherein the feedback time unit is based on the channel occupation time corresponding to the first data Therefore, the sending process of the feedback information can increase the frequency domain bandwidth occupied by the feedback information, so that the sidelink information feedback process of the first terminal device meets the requirements for channel access in the unlicensed frequency band.
  • the feedback mechanism of HARQ information can be used in the unlicensed frequency band to improve the communication reliability of the SL system in the unlicensed frequency band.
  • the first terminal device accessing the first channel may report to the second frequency domain resource (PSFCCH frequency domain resource 1 in FIG. 15 ) in the feedback time unit.
  • the terminal device sends the first feedback information, and sends the second feedback information to the second terminal device on the second frequency domain resource (PSFCCH frequency domain resource 2 in FIG. 15 ) in the feedback time unit.
  • other terminal devices other than the first terminal device may send feedback information through the feedback time unit, including but not limited to the third terminal device and the fourth terminal device shown in the figure.
  • these terminal devices can all send feedback information on the second frequency domain resource, and each terminal device including the first terminal device respectively transmits feedback information on the respective first frequency domain resource Valid feedback information for respective sidelink information is sent.
  • the third terminal device may send third feedback information through PSFCH resource 3 and send fourth feedback information through PSFCH resource 2 .
  • the third terminal device may receive sidelink information (for example, including the second data) from any terminal device other than the third terminal device (such as the fifth terminal device), and send the ACK or NACK corresponding to sidelink information.
  • the fourth feedback information may be invalid feedback information.
  • the manner in which the third terminal device determines PSFCH resource 3 may refer to the manner in which the first terminal device determines the first frequency domain resource
  • the manner in which the third terminal device determines PSFCH resource 2 may refer to the manner in which the first terminal device determines the second feedback way of resources.
  • the fourth terminal device can send valid feedback information on PSFCH resource 4 and send invalid feedback information on PSFCH resource 2 .
  • valid feedback information exemplified here refer to the description of the first feedback information in this application, and for invalid feedback information, refer to the description of the second feedback information in this application.
  • the sidelink information of the first terminal device, the third terminal device, and the fourth terminal device can be sent through interleaved resources, and therefore can be sent to the first terminal device to the fourth terminal device by At least one terminal device of sidelink information occupies the first channel.
  • an embodiment of the present application further provides a communication device, configured to implement the above functions implemented by the first terminal device and/or the second terminal device.
  • the device may include the structure shown in FIG. 6 and/or FIG. 7 .
  • the transceiver module 620 may be configured to receive the first data from the second terminal device.
  • the processing module 610 can be used to determine the feedback time unit within the channel occupancy time.
  • the transceiver module 620 is also configured to access the first channel, and send the first feedback information on the first frequency domain resource in the feedback time unit, and send the second feedback information on the second frequency domain resource in the feedback time unit information.
  • the first feedback information, the first frequency domain resource, and the second frequency domain resource refer to the description of the foregoing method embodiment.
  • the processing module 610 is further configured to determine the first frequency domain resource to be used.
  • the transceiver module 620 is further configured to receive indication information of the channel occupation time from the second terminal device.
  • the second frequency domain resource may be indicated by a network device, or preconfigured, or predefined. If indicated by the network device, the transceiving module 620 is further configured to receive indication information of the second frequency domain resource.
  • the second frequency domain resource is the m th interleaving resource in the first channel
  • the interleaving resource includes at least two resource blocks interleaved in the frequency domain, where m is an integer, and the m greater than or equal to 1, and less than or equal to the total number of interleaving resources included in the first channel.
  • the value of m is predefined, indicated by the network device or preconfigured. If indicated by the network device, the transceiver module 620 may also be configured to receive indication information of the value of m.
  • the first resource block of the second frequency domain resource is the N1th resource block in the first channel
  • the last resource block of the second frequency domain resource is the N1th resource block in the first channel.
  • the N2th resource block of where N1 and N2 are positive integers, and the values of N1 and/or N2 are predefined, indicated by the network device, or preconfigured. If indicated by the network device, the transceiver module 620 may also be configured to receive indication information of the value of N1 and/or the value of N2.
  • the processing module 610 may also be configured to determine the first frequency domain resources.
  • the transceiver module 620 can be specifically configured for the first terminal device to send the first feedback information on the first frequency domain resource in the feedback time unit according to the first code domain resource, the first code domain The resource is determined according to the index and/or number of the interleaving resource corresponding to the time-frequency resource carrying the first data, and the identification information corresponding to the first data.
  • the processing module 610 may be configured to determine the first code domain resource.
  • the processing module 610 may be configured to determine the feedback time unit from a time unit set according to the time-frequency resource carrying the first data, the time unit set includes at least one time unit, and the at least one time unit A unit of time within a unit contains feedback resources.
  • the time domain interval between the starting position of the first time unit in the time unit set and the starting position of the channel occupancy time can be X 1 time units, and the time unit set The time domain interval between every two adjacent time units in can be M 1 time units, where X 1 and M 1 can be predefined, indicated by the network device, indicated by the second terminal device, or Pre-configured, X 1 is a positive integer greater than or equal to 0, and M 1 is a positive integer greater than or equal to 0.
  • the transceiver module 620 may also be configured to receive indication information of the value of X 1 and/or M 1 .
  • the processing module 610 may be configured to determine the time unit set from the time units included in the channel occupation time according to the received first indication information, the first indication information comes from the network device or the second terminal device.
  • the transceiving module 620 is also configured to receive first indication information.
  • the processing module 610 may be configured to determine that the feedback time unit may be the last time unit in the channel occupation time when the channel occupation time is less than a time threshold.
  • the actions performed by the processing module 610 in the above example may be performed by the processing unit 720 shown in FIG. 7 , and details are not repeated here.
  • the above actions of the first communication device performed by the transceiving module 620 may be performed by the transceiving unit 710 shown in FIG. 7 .
  • the transceiver module 620 can be used to access the first channel and send the first data to the first terminal device.
  • the processing module 610 can be used to determine the feedback time unit within the channel occupancy time.
  • the transceiving module 620 is further configured to receive first feedback information on the first frequency domain resource in the feedback time unit.
  • the processing module 610 is further configured to determine the first frequency domain resource to be used.
  • the transceiver module 620 is further configured to receive and discard the second feedback information.
  • the processing module 610 is further configured to determine a second frequency domain resource for carrying the second feedback information.
  • the second frequency domain resource may be indicated by a network device, or preconfigured, or predefined. If indicated by the network device, the transceiving module 620 is further configured to receive indication information of the second frequency domain resource.
  • the second frequency domain resource is the m th interleaving resource in the first channel
  • the interleaving resource includes at least two resource blocks interleaved in the frequency domain, where m is an integer, and the m greater than or equal to 1, and less than or equal to the total number of interleaving resources included in the first channel.
  • the value of m is predefined, indicated by the network device or preconfigured. If indicated by the network device, the transceiver module 620 may also be configured to receive indication information of the value of m.
  • the first resource block of the second frequency domain resource is the N1th resource block in the first channel
  • the last resource block of the second frequency domain resource is the N1th resource block in the first channel.
  • the N2th resource block of where N1 and N2 are positive integers, and the values of N1 and/or N2 are predefined, indicated by the network device, or preconfigured. If indicated by the network device, the transceiver module 620 may also be configured to receive indication information of the value of N1 and/or the value of N2.
  • the transceiver module 620 is further configured to send indication information of channel occupation time to the first terminal device.
  • the processing module 610 may also be configured to determine the first frequency domain resources.
  • the transceiver module 620 can be specifically configured for the first terminal device to receive the first feedback information on the first frequency domain resource in the feedback time unit according to the first code domain resource, the first code domain resource The resource is determined according to the index and/or number of the interleaving resource corresponding to the time-frequency resource carrying the first data, and the identification information corresponding to the first data.
  • the processing module 610 may be configured to determine the first code domain resource.
  • the processing module 610 may be configured to determine the feedback time unit from a time unit set according to the time-frequency resource carrying the first data, the time unit set includes at least one time unit, and the at least one time unit A unit of time within a unit contains feedback resources.
  • the time domain interval between the starting position of the first time unit in the time unit set and the starting position of the channel occupancy time can be X 1 time units, and the time unit set The time domain interval between every two adjacent time units in can be M 1 time units, where X 1 and M 1 can be predefined, indicated by the network device, indicated by the second terminal device, or Pre-configured, X 1 is a positive integer greater than or equal to 0, and M 1 is a positive integer greater than or equal to 0.
  • the transceiver module 620 may also be configured to receive indication information of the value of X 1 and/or M 1 .
  • the transceiver module 620 is further configured to send first indication information to the first terminal device, where the first indication information is used by the first terminal device to determine the A collection of time units.
  • the processing module 610 may be configured to determine the time unit set from the time units included in the channel occupation time according to received second indication information, where the second indication information comes from the network device.
  • the transceiving module 620 is also configured to receive second indication information.
  • the processing module 610 may be configured to determine that the feedback time unit may be the last time unit in the channel occupation time when the channel occupation time is less than a time threshold.
  • the actions performed by the processing module 610 in the above examples may be performed by the processing unit 720 shown in FIG. 7 , and details are not repeated here.
  • the above actions of the second communication device performed by the transceiving module 620 may be performed by the transceiving unit 710 shown in FIG. 7 .
  • the communication system may include the first terminal device and/or the second terminal device involved in the above embodiments.
  • the communication system may include any structure shown in FIG. 1 to FIG. 2 .
  • the communication device may be used to implement the steps implemented by the first terminal device and/or the second terminal device in the communication method shown in FIG. 8 .
  • the embodiment of the present application also provides a computer-readable storage medium.
  • the computer-readable storage medium is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 8 provided by the above-mentioned method embodiment. Processes related to the first terminal device and/or the second terminal device.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the first terminal in the embodiment shown in FIG. 8 provided in the above method embodiment. device and/or the process related to the second terminal device.
  • the embodiment of the present application also provides a chip or a chip system (or circuit), the chip may include a processor, and the processor may be used to call programs or instructions in the memory to execute the implementation shown in Figure 8 provided by the above method embodiment In the example, the process related to the first terminal device and/or the second terminal device.
  • the system-on-a-chip may include the chip, and other components such as a memory or a transceiver.
  • the communication device in the foregoing embodiments may be a terminal device, or may be a chip applied in the terminal device, or other combined devices, components, etc. that can realize the functions of the above-mentioned terminal device.
  • the transceiver unit may be a transmitter and a receiver, or an integrated transceiver, which may include an antenna and a radio frequency circuit, etc.
  • the processing unit may be a processor, such as a baseband chip.
  • the transceiver unit may be a radio frequency unit
  • the processing unit may be a processor.
  • the transceiver unit may be an input-output interface of the system-on-a-chip
  • the processing unit may be a processor of the system-on-a-chip, such as a central processing unit (CPU).
  • CPU central processing unit
  • the processor in the embodiment of the present application may be a CPU, or other general-purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuits, ASICs), Field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • DSP digital signal processor
  • ASIC application specific integrated circuits
  • FPGA Field programmable gate array
  • a general-purpose processor can be a microprocessor, or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the ASIC can be located in the first terminal and/or in the second terminal.
  • the processor and the storage medium may also exist in the network device or the terminal device as discrete components.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer program or instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrating one or more available media.
  • the available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; and it may also be a semiconductor medium, such as a solid state disk.
  • At least one item (unit) of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b, c Can be single or multiple.

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Abstract

一种通信方法及装置，该通信方法包括：第一终端装置可接收来自第二终端装置的第一数据，并确定在信道占用时间内的反馈时间单元，该反馈时间单元对应该第一数据。第一终端装置可在反馈时间单元中的第一频域资源发送第一反馈信息，在第二频域资源发送第二反馈信息。其中，该第一反馈信息为针对该第一数据的确认应答或否定应答，该第一频域资源为根据承载该第一数据的时频资源确定的，该第一频域资源和该第二频域资源属于该第一信道，且该第一频域资源与该第二频域资源不重叠。能够提高非授权频段下SL系统的通信可靠性。

Description

通信方法及装置
相关申请的交叉引用
本申请要求在2021年06月21日提交中国专利局、申请号为202110688161.4、申请名称为“通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
在无线通信系统中，按照使用频段的不同，可以分为授权频段和非授权频段。在非授权频段中，发射节点需要按照竞争的方式接入信号。
目前的竞争接入机制中，一般采用基于能量的检测和信号类型的检测。基于能量的检测中，需要设定一个检测门限(energy detection threshold)，当检测的能量超过检测门限时，判决为信道忙，则不允许发射节点接入信道。当检测的能量低于检测门限时，如果持续超过一段时间，则允许发射节点接入信道。
在目前的新空口(new radio，NR)侧行链路(sidelink，SL)系统中，物理层侧行链路反馈信道(physical sidelink feedback channel，PSFCH)信息可用于承载混合式自动重传请求(hybrid automatic repeat request，HARQ)反馈信息。
然而，目前PSFCH的发送方式不适用于非授权频段，导致目前SL系统的通信可靠性无法获得保证。
发明内容
本申请提供一种通信方法及装置，可以提高非授权频段下SL系统的通信可靠性。
第一方面，提供一种通信方法。该通信方法可由第一终端装置执行。第一终端装置包括第一终端设备或第一终端设备中的部件。本申请中，第一终端设备可以为车与任何事物(vehicle to everything，V2X)通信中的数据接收端，第二终端设备可以为V2X通信中的数据发送端。应理解，第一终端设备通过HARQ反馈信息向第二终端设备反馈数据的接收情况。第一终端设备中的部件例如可以为装载于数据接收端中的处理器、车载通信模组、芯片或芯片系统等。其中，第一终端装置支持直接通信(PC5)接口通信。
第一方面提供的方法包括，第一终端装置可以接收来自第二终端装置的第一数据，该第一终端装置确定在信道占用时间内的反馈时间单元，该反馈时间单元对应该第一数据。第一终端装置还可接入第一信道，并在该反馈时间单元中的第一频域资源上发送第一反馈信息，并在该反馈时间单元中的第二频域资源上发送第二反馈信息。其中，该第一反馈信息为针对该第一数据的确认应答或否定应答，该第一频域资源为根据承载该第一数据的时频资源确定的，该第一频域资源和该第二频域资源属于该第一信道，且该第一频域资源与该第二频域资源不重叠。
其中，第二终端装置可以是第二终端设备或第二终端设备中的部件。
采用以上方法，第一终端装置可接收来自第二终端装置的第一数据，并确定在信道占用时间内的反馈时间单元，该反馈时间单元对应该第一数据。第一终端装置可在反馈时间单元中的第一频域资源发送第一反馈信息，在第二频域资源发送第二反馈信息。其中，该第一反馈信息为针对该第一数据的确认应答或否定应答，该第一频域资源为根据承载该第一数据的时频资源确定的，该第一频域资源和该第二频域资源属于该第一信道，且该第一频域资源与该第二频域资源不重叠。能够提高非授权频段下SL系统的通信可靠性。
在一种可能的设计中，该信道占用时间为该第二终端装置确定的最大信道占用时间，或该信道占用时间小于该第二终端装置确定的最大信道占用时间。
在一种可能的设计中，该第一终端装置还可接收来自于该第二终端装置的该信道占用时间的指示信息。第二终端可以根据自身业务特点，例如时延、数据包大小等，灵活指示信道占用时间的侧行反馈资源，提升反馈的资源利用效率。
在一种可能的设计中，该第二频域资源是由网络设备指示的，或预配置的，或预定义的。
在一种可能的设计中，该第二频域资源包括两个不连续的资源块，该两个不连续的资源块之间的频域间隔为Offset个资源块，该Offset满足：(Offset+2)个资源块所对应的带宽大于或等于该第一信道的带宽和第一系数的乘积，该第一系数大于0且小于等于1。
采用该设计，可使得第一终端装置占用的第一信道的更多带宽以满足非接入频段的占用信道带宽(occupied channel bandwidth，OCB)要求。
在一种可能的设计中，该第二反馈信息可以是该第一反馈信息的复制信息，或者是该第二反馈信息为预定义的比特流。
在一种可能的设计中，该第二频域资源为该第一信道中的第m个交错资源，该交错资源包含至少两个在频域上交错的资源块，其中m为整数，该m大于或等于1，且，小于或等于该第一信道中包括的交错资源的总数，其中，m的取值是预定义的、网络设备指示的或预配置的。
在一种可能的设计中，该第二频域资源的第一个资源块为该第一信道中的第N1个资源块，该第二频域资源的最后一个资源块为该第一信道中的第N2个资源块，其中，N1和N2为正整数，并且，N1和N2的取值是预定义的、网络设备指示的或预配置的。
在一种可能的设计中，该第一频域资源可以是根据该承载该第一数据的时频资源对应的交错资源的索引和/或个数，和该第一数据对应的标识信息确定的。
在一种可能的设计中，该第一终端装置在该反馈时间单元中的第一频域资源上发送第一反馈信息，包括：该第一终端装置根据第一码域资源，在该反馈时间单元中的第一频域资源上发送第一反馈信息，该第一码域资源为根据该承载该第一数据的时频资源对应的交错资源的索引和/或个数，和该第一数据对应的标识信息确定的。
在一种可能的设计中，该第一终端装置确定在信道占用时间内的对应该第一数据的反馈时间单元，包括：该第一终端装置根据该承载该第一数据的时频资源，从时间单元集合中确定该反馈时间单元，该时间单元集合包括至少一个时间单元，该至少一个时间单元中的时间单元包含反馈资源。
在一种可能的设计中，该时间单元集合中的第一个该时间单元的起始位置与该信道占用时间的起始位置之间的时域间隔可以是X 1个时间单元，该时间单元集合中的每两个相邻的该时间单元之间的时域间隔可以是M 1个时间单元，其中，X 1和M 1可以是预定义的、网 络设备指示的、第二终端装置指示的或预配置的，X 1为大于或等于0的正整数，M 1为大于或等于0的正整数。
在一种可能的设计中，该第一终端装置还可根据接收的第一指示信息从该信道占用时间包括的时间单元中，确定该时间单元集合，该第一指示信息来自于网络设备或该第二终端装置。
在一种可能的设计中，该反馈时间单元可以是该信道占用时间中的最后一个时间单元。PSFCH资源在信道占用时间中固定的位置，节约配置信令和指示信令的开销。
在一种可能的设计中，该第一终端装置确定在信道占用时间内的对应该第一数据的反馈时间单元，包括：在该信道占用时间小于时间阈值的情况下，该反馈时间单元可以是该信道占用时间中的最后一个时间单元。
第二方面，提供一种通信方法。该通信方法可由第二终端装置执行。第二终端装置包括第二终端设备或第二终端设备中的部件。如前述，第二终端设备可以为V2X通信中的数据发送端。第二终端设备中的部件例如可以为装载于数据发送端中的处理器、车载通信模组、芯片或芯片系统等。其中，第二终端装置支持PC5接口通信。
第二方面提供的方法包括，第二终端装置可接入第一信道，并向第一终端装置发送第一数据。该第二终端装置可确定在信道占用时间内的反馈时间单元，该反馈时间单元对应该第一数据。该第二终端装置可以在该反馈时间单元中的第一频域资源上接收第一反馈信息。其中，该第一反馈信息为针对该第一数据的确认应答或否定应答，该第一频域资源为根据承载该第一数据的时频资源确定的。
在一种可能的设计中，该第二终端装置还可接收并弃置第二反馈信息，该第二反馈信息承载于该反馈时间单元中的第二频域资源，该第一频域资源和该第二频域资源属于该第一信道，且该第一频域资源与该第二频域资源不重叠。
在一种可能的设计中，该第二频域资源可以是由网络设备指示的，或预配置的，或预定义的。
在一种可能的设计中，该第二频域资源可以包括两个不连续的资源块，该两个不连续的资源块之间的频域间隔为Offset个资源块，该Offset满足：(Offset+2)个资源块所对应的带宽大于或等于该第一信道的带宽和第一系数的乘积，该第一系数大于0且小于等于1。
在一种可能的设计中，该第二反馈信息可以是该第一反馈信息的复制信息，或该第二反馈信息为预定义的比特流。
在一种可能的设计中，该第二频域资源为该第一信道中的第m个交错资源，该交错资源包含至少两个在频域上交错的资源块，其中m为整数，该m大于或等于1，且，小于或等于该第一信道中包括的交错资源的总数，其中，m的取值是预定义的、网络设备指示的或预配置的。
在一种可能的设计中，该第二频域资源的第一个资源块为该第一信道中的第N1个资源块，该第二频域资源的最后一个资源块为该第一信道中的第N2个资源块，其中，N1和N2为正整数，并且，N1和N2的取值是预定义的、网络设备指示的或预配置的。
在一种可能的设计中，该信道占用时间可以是该第二终端装置确定的最大信道占用时间，或该信道占用时间小于该第二终端装置确定的最大信道占用时间。
在一种可能的设计中，该第二终端装置还可向该第一终端装置发送该信道占用时间的指示信息。
在一种可能的设计中，该第一频域资源可以是根据该承载该第一数据的时频资源对应的交错资源的索引和/或个数，和该第一数据对应的标识信息确定的。
在一种可能的设计中，该第二终端装置在该反馈时间单元中的第一频域资源上接收第一反馈信息，包括：该第二终端装置可根据第一码域资源，在该反馈时间单元中的第一频域资源上接收第一反馈信息，该第一码域资源为根据该承载该第一数据的时频资源对应的交错资源的索引和/或个数，和该第一数据对应的标识信息确定的。
在一种可能的设计中，该第二终端装置确定在信道占用时间内的对应该第一数据的反馈时间单元，包括：该第二终端装置可根据该承载该第一数据的时频资源，从时间单元集合中确定该反馈时间单元，该时间单元集合包括至少一个时间单元，该至少一个时间单元中的时间单元包含反馈资源。
在一种可能的设计中，该时间单元集合中的第一个该时间单元的起始位置与该信道占用时间的起始位置之间的时域间隔可以是X 1个时间单元，该时间单元集合中的每两个相邻的该时间单元之间的时域间隔可以是M 1个时间单元，其中，X 1和M 1可以是预定义的、网络设备指示的、第二终端装置指示的或预配置的，X 1为大于或等于0的正整数，M 1为大于或等于0的正整数。
在一种可能的设计中，该第二终端装置还可向第一终端装置发送第一指示信息，该第一指示信息用于该第一终端装置从该信道占用时间包括的时间单元中，确定该时间单元集合。
在一种可能的设计中，该第二终端装置还可根据接收的第二指示信息从该信道占用时间包括的时间单元中，确定该时间单元集合，该第二指示信息来自于网络设备。
在一种可能的设计中，该反馈时间单元可以是该信道占用时间中的最后一个时间单元。
在一种可能的设计中，该第一终端装置确定在信道占用时间内的对应该第一数据的反馈时间单元，包括：在该信道占用时间小于时间阈值的情况下，该反馈时间单元可以是该信道占用时间中的最后一个时间单元。
第三方面，本申请实施例提供一种通信装置，可以实现上述第一方面或其任一可能的设计中由第一终端装置实现的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为第一终端装置、或者为可支持第一终端装置中实现上述方法的部件或芯片、芯片系统、车载通信模组或处理器等。
示例性的，该通信装置可包括收发单元(或称通信模块、收发模块)和处理单元(或称处理模块)等等模块化组件，这些模块可以执行上述第一方面或其任一可能的设计中第一终端装置的相应功能。当通信装置是第一终端装置时，收发单元在执行发送步骤时可以是发送单元，收发单元在执行接收步骤时可以是接收单元，而收发单元可以由收发器代替，发送单元可以由发送器代替，接收单元可以由接收器代替。收发单元可以包括天线和射频电路等，处理单元可以是处理器，例如基带芯片等。当通信装置是具有上述第一终端装置功能的部件时，收发单元可以是射频单元，处理单元可以是处理器。当通信装置是芯片系统时，收发单元可以是芯片系统的输入输出接口、处理单元可以是芯片系统的处理器，例 如：中央处理单元(central processing unit，CPU)。
收发单元可用于执行第一方面或其任一可能的设计中由第一终端装置执行的接收和/或发送的动作。处理单元可用于执行第一方面或其任一可能的设计中由第一终端装置执行的接收和发送以外的动作。
可选的，该通信装置可包括收发模块和/或通信模块。
可选的，该通信装置可包括处理器和/或收发器。该通信装置还可包括存储器。
第四方面，本申请实施例提供一种通信装置，可以实现上述第一方面或其任一可能的设计中由第二终端装置实现的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为第二终端装置、或者为可支持第二终端装置中实现上述方法的芯片、芯片系统、车载通信模组、或处理器等。
示例性的，该通信装置可包括收发单元(或称通信模块、收发模块)和处理单元(或称处理模块)等等模块化组件，这些模块可以执行上述第一方面或其任一可能的设计中第二终端装置的相应功能。当通信装置是第二终端装置时，收发单元在执行发送步骤时可以是发送单元，收发单元在执行接收步骤时可以是接收单元，而收发单元可以由收发器代替，发送单元可以由发送器代替，接收单元可以由接收器代替。收发单元可以包括天线和射频电路等，处理单元可以是处理器，例如基带芯片等。当通信装置是具有上述第二终端装置功能的部件时，收发单元可以是射频单元，处理单元可以是处理器。当通信装置是芯片系统时，收发单元可以是芯片系统的输入输出接口、处理单元可以是芯片系统的处理器，例如：CPU。
收发单元可用于执行第一方面或其任一可能的设计中由第二终端装置执行的接收和/或发送的动作。处理单元可用于执行第一方面或其任一可能的设计中由第二终端装置执行的接收和发送以外的动作。
可选的，该通信装置可包括收发模块和/或通信模块。
可选的，该通信装置可包括处理器和/或收发器。该通信装置还可包括存储器。
第五方面，提供一种通信系统，该通信系统包括第三方面以及第四方面所示的通信装置。
第六方面，提供一种计算机可读存储介质，该计算机可读存储介质用于存储计算机指令或程序，当该计算机指令或程序在计算机上运行时，使得该计算机执行上述第一方面至第二方面或其任意一种可能的实施方式中所述的方法。
第七方面，提供一种计算机程序产品，当其在计算机上运行时，使得该计算机执行上述第一方面至第二方面或其任意一种可能的设计中所述的方法。
第八方面，提供一种电路，该电路与存储器耦合，该电路被用于执行上述第一方面至第二方面或其任意一种可能的实施方式中所述的方法。该电路可包括芯片电路、芯片或芯片系统等。
以上第二方面至第八方面及其可能的设计的有益效果可参照第一方面及其可能的设计中的有益效果。
附图说明
图1为本申请实施例提供的一种通信系统的架构示意图；
图2为本申请实施例提供的另一种通信系统的架构示意图；
图3A为本申请实施例提供的物理时隙与逻辑时隙对应关系示意图；
图3B为本申请实施例提供的一种交错资源的结构示意图；
图4为本申请实施例提供的一种PSFCH资源的位置示意图；
图5为本申请实施例提供的一种PSFCH资源的确定方式示意图；
图6为本申请实施例提供的一种通信装置的结构示意图；
图7为本申请实施例提供的另一种通信装置的结构示意图；
图8为本申请实施例提供的一种通信方法的流程示意图；
图9为本申请实施例提供的一种反馈时间单元的位置示意图；
图10为本申请实施例提供的另一种反馈时间单元的位置示意图；
图11为本申请实施例提供的另一种反馈时间单元的位置示意图；
图12为本申请实施例提供的一种第二频域资源的位置示意图；
图13为本申请实施例提供的另一种第二频域资源的位置示意图；
图14为本申请实施例提供的一种第一频域资源和第二频域资源的位置示意图；
图15为本申请实施例提供的一种第一频域资源的位置示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)终端装置，例如是终端设备，或者是用于实现终端设备的功能的模块，例如芯片系统，该芯片系统可以设置在终端设备中。终端设备包括向用户提供数据连通性的设备，具体的，包括向用户提供数据连通性的设备，或包括向用户提供数据连通性的设备。例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换数据，或与核心网交互语音和数据。该终端设备可以包括用户设备(user equipment，UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device，D2D)终端设备、车与任何事物(vehicle to everything，V2X)通信终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端设备、物联网(internet of things，IoT)终端设备。最典型的，终端装置可以为车辆、船舶或飞行器等载具或终端型路边单元，或内置于车辆或路边单元的通信模块或芯片。一种V2X技术中的网络设备为路侧单元(road side unit，RSU)。RSU可以是支持V2X应用的固定基础设施实体，可以与支持V2X应用的其他实体通过PC5空口交换消息。
本申请实施例中，终端装置之间支持PC5接口通信，即支持通过侧行链路进行传输。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设 备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
而如上介绍的各种终端设备，如果位于车辆上，例如放置在车辆内或安装在车辆内，都可以认为是车载终端设备，车载终端设备例如也称为车载单元(on board unit，OBU)。
本申请实施例中，终端设备还可以包括中继(relay)。或者理解为，能够与基站进行数据通信的都可以看作终端设备。
可选的，还可将路侧单元(road side unit，RSU)视为终端装置。
下文中，可通过终端装置为例对于本申请实施例提供的通信方法进行说明。比如，侧行通信中进行侧行数据发送的一方(如发射节点)可称为发送端终端装置，用于侧行数据接收的一方(如接收射节点)可称为接收端终端装置。本申请中为方便说明，后续将接收侧行链路信息的终端装置(即侧行链路信息的接收节点)称为第一通信装置，将发送侧行链路信息的终端装置(即侧行链路信息的发送节点)称为第二终端装置，或者说，第一通信装置为侧行反馈信息的发送节点，第二通信装置为该侧行反馈信息的接收节点，其中，侧行反馈信息可用于指示第一终端装置对于侧行链路信息的接收情况(包括正确接收，或错误接收)。侧行反馈信息可以用于对数据信息的(包括混合自动重传请求(hybrid automatic repeat request，HARQ)应答反馈信息，例如确认应答(acknowledge，ACK)或否定应答(negative acknowledge，NACK)，还可以包括信道状态指示(channel state information，CSI)反馈信息)、还可以用于指示如下至少一种信息，例如，节能信息、资源辅助信息(包括推荐使用的资源，不推荐使用的资源，资源碰撞、资源预约冲突、过去发生了或未来即将发生半双工冲突等)。
其中，在本申请中，侧行链路信息可包括侧行发现信息(该侧行发现信息可以承载于侧行发现信道(physical sidelink discovery channel，PSDCH)和/或物理层侧行链路共享信道(physical sidelink shared channel，PSSCH)中)、侧行控制信息(sidelink control information，SCI)(该SCI落承载于侧行控制信道(physical sidelink control channel，PSCCH)中和/或PSSCH中)、侧行数据信息(或称为数据、侧行数据等)(该侧行数据信息承载于PSSCH中)、侧行反馈信息(承载于PSFCH中)、侧行同步信息(承载于侧行同步块(sidelink-synchronization signal block，S-SSB)中或者侧行导频信息(reference signaling)(包括解调参考符号(de-modulation reference signal，DMRS)、信道状态信息参考符号(channel state information reference signal，CSI-RS)、相位追踪参考信号(phase-tracking reference signal，PTRS)、定位参考符号(position reference signal，PRS)或发现信道(discovery reference signal，DRS)等)等至少一种信息。
2)网络设备，例如包括接入网(access network，AN)设备，例如基站，可以是指接入网中在空口通过一个或多个小区与终端装置通信的设备，或者例如，一种V2X技术中的网络设备为路侧单元(road side unit，RSU)。RSU可以是支持V2X应用的固定基础设施实体，可以与支持V2X应用的其他实体通过Uu空口交换消息。网络设备可以包括演进通用陆地无线接入网节点B(E-UTRAN Node B，eNB)、第五代移动通信技术(the 5th generation，5G)NR系统中的下一代节点B(next generation node B，gNB)，或者也可以 包括云接入网(cloud radio access network，Cloud RAN)系统中的集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)，本申请实施例并不限定。
因为本申请实施例主要涉及接入网设备，因此在下文中，如无特殊说明，则所述的网络设备均是指接入网设备。下文中，可通过基站来代表网络设备和/或接入网设备。
本申请实施例中，用于实现网络设备的功能的装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统，该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
(3)侧行通信，在本申请中是指终端装置与终端装置之间通过侧行链路进行的通信。
下面以V2X通信为例对侧行通信进行说明。
V2X通信针对以车辆为代表的高速设备，是未来对通信时延要求非常高的场景下应用的基础技术和关键技术。V2X通信的应用领域包括智能汽车、自动驾驶和智能交通运输系统等。如图1所示，较为典型的V2X通信场景包括车与车的通信(vehicle to vehicle，V2V)、车与行人的通信(vehicle to pedestrian，V2P)、车与基础设施的通信(vehicle to infrastructure，V2I)或车与网络的通信(vehicle to network，V2N)。其中，对于V2V通信，第一终端装置和/或第二终端装置可以是车辆或位于车载中的车载终端装置等。例如，对于V2P通信，第一终端装置和第二终端装置中，一方可以是车辆或位于车载中的车载终端装置等，另一方可以是移动终端、可穿戴设备等由行人随身携带的终端装置。对于V2P通信，第一终端装置和第二终端装置中，一方可以是车辆或位于车载中的车载终端装置等，另一方可以是RSU等基础设施。对于V2N通信，第一终端装置和第二终端装置中，一方可以是车辆或位于车载中的车载终端装置等，另一方可以是基站。
以第二终端装置为侧行链路信息的发送节点为例，基于V2X通信，第二终端装置可将自身的位置、速度等状态信息，或转弯、并线或倒车等行驶意图信息，或由周期性或非周期性的事件触发的信息，作为侧行数据向周围的终端装置发送。同样地，该第二终端装置也可以接收来自于周围的其他终端装置的侧行数据。此外，该第二终端装置还可转发其接收到的其他终端装置的侧行数据。示例性的，侧行数据和/或侧行反馈信息承载于PSSCH。
V2X通信可以支持有网络覆盖和无网络覆盖的通信场景。在如图2中编号a和b所示的第一终端装置有网络覆盖的场景下，第一终端装置通过V2X通信进行发送时的资源分配方式可以采取网络设备调度模式。例如，通过网络设备调度发送的终端装置进行侧行链路通信所采用的资源，该资源可称为授权资源或授权频段。在图2中编号c所示的第一终端装置无网络覆盖场景下，或虽然有网络覆盖但第一终端装置未采用网络设备调度模式的情况下，可由第一终端装置进行资源的自选，即从资源池中选择用于侧行链路通信的资源，该资源可称为非授权资源或非授权频段。应理解，本申请中的资源可替换为时频资源，和/或时频码资源。本申请中，时频资源包括时域资源和/或频域资源。时频码资源包括时域资源、频域资源和码域资源中的至少一个。
在网络覆盖范围下，终端装置可通过接收网络设备的系统消息块(system information block，SIB)、小区级(cell-specific)的无线资源控制(radio resource control，RRC)信令或者终端装置用户级(UE-specific)RRC信令获得SL资源池(resource pool)配置信息和/或SL带宽部分(bandwidth part，BWP)配置信息。终端装置也可以使用预配置的SL资源池配置信息或SL BWP配置信息，例如，在没有网络覆盖范围时。SL资源池配置信息 包括资源池资源信息，资源池资源信息用于指示SL资源池。资源池是时频资源的集合用于UE之间进行侧行通信。资源池可以包括码域资源。资源池的资源用于包括终端装置发送和接收以下至少一种物理信道的资源，如PSCCH、PSSCH、PSDCH、PSFCH，或PSBCH等，PSSCH所承载的业务类型可以包括单播、组播和/或广播通信类型。在SL资源池的时域上，包括一个或多个时间单元，时间单元可以为一个或若干个符号、一个或若干个时隙(slot)，一个或若干个微时隙(mini-slot)、一个或若干个子帧，或，一个或若干个帧等。一个或多个时间单元可以是在时间上连续的，也可以是离散的。应理解，在一个资源池内时域单元是逻辑上连续的。
如图3A所示，时隙1至时隙8是时间上连续的时隙，称这种时隙为物理时隙(physical slot)。将物理时隙——时隙1，时隙3，时隙5和时隙8配置为属于一个资源池的时隙。因资源池所包含的时隙在时间上可以是不连续的，那么从该资源池的角度而言，物理时隙上的时隙1，时隙3，时隙5和时隙8对应为资源池中的时隙1’、时隙2’、时隙3’和时隙4’，那么。该资源池中包含的连续的时隙(即时隙1’、时隙2’、时隙3’和时隙4’)为从资源池的逻辑上讲是连续的时隙，称这种逻辑上连续但时间上不一定连续的时隙为逻辑时隙(logical slot)。在SL资源池的频域上，包括一个或多个频域单元，频域单元可以是一个资源元素(resource element，RE)，若干个RE，一个资源块(resource block，RB)、若干个RB、一个子信道(sub channel)、若干个子信道。子信道的大小，即表示一个子信道包括一个或多个在频域上连续的(continuous)或交错的(interlaced)RB数量，可以是10、12、15、20、25或50等整数。
交错的RB是离散的RB的其中一种形式。例如，一个信道或一个BWP或一个资源池或一个资源池中的子信道所包含的多个RB是交错的，指该子信道所包含的任意相邻的两个RB之间至少间隔一个不属于该子信道的RB。具体地，定义交错资源(interlace)为：一个信道或一个BWP或一个资源池或一个资源池中的子信道可以包括M个交错资源，其中第m个交错资源(m∈{0,1,…,M-1})包括的交错的RB的序号为{m,M+m,2M+m,3M+m,…}。一般情况，一个交错资源包括至少10个交错的RB。一个交错资源包括的交错的RB的个数也可以少于10个，这里不做限定。M的取值和子载波间隔(sub carrier spacing，SCS)有关，例如图3B所示，当使用15千赫兹(kHz)SCS时，M的取值可以为10，当使用30kHz SCS时，M的取值可以为5。
SL资源池配置信息还可以包括PSCCH的配置信息，PSCCH的配置信息包括一个时隙中PSCCH所占用的符号的数量和一个子信道中PSCCH所占用的RB个数。SL BWP配置信息可以包括SL资源池信息，用于配置BWP内包括的资源池的个数。SL BWP配置信息可以包括SL带宽信息，用于指示进行SL通信的带宽大小，例如指示SL带宽为20兆赫兹(MHz)。
SL BWP配置信息还可以包括SL的符号信息，用于指示一个时隙上起始的SL符号位置和所占用的连续的SL符号的个数。SL BWP配置信息还可以包括SL的子载波间隔和循环前缀信息，用于指示SL通信所使用的子载波间隔和循环前缀。循环前缀指示扩展循环前缀或正常循环前缀。在一种可能的配置中，SL BWP配置信息还可以包括SL资源池配置信息。本申请中，除非特殊说明时间单元的含义，均用时隙进行描述，但不限于时间单位只为时隙；除非特殊说明时频域单元的含义，均用子信道进行描述，但不限于频域单位只为子信道。
在非授权频段中，发射端终端装置按照竞争的方式接入信号，例如，按照欧洲电信标准化组织(european telecommunications standards institute，ETSI)定义的信道接入方式。竞争的接入方式主要包括基于负载的设备(load based equipment，LBE)和基于框架的设备(frame based equipment，FBE)。
对于非授权频段的接入，LBE和FBE均需要终端装置进行先听后说(listen before talk，LBT)。举例来说，在接入非授权频段时可采用基于能量的检测。基于能量的检测需要设定一个检测门限(energy detection threshold)，当终端装置检测到的信道能量超过检测门限时，判决为信道忙，则不允许接入信道。当检测的信道能量低于检测门限时，如果持续超过一段时间，如34微秒(μs)，则允许开始退避，退避窗的大小和业务优先级相关，优先级越高，退避窗越小。终端装置在退避窗中随机选择一个退避数值K进行退避。检测的能量低于检测门限的时长每持续9μs，则K值减1，直至退避数值K减至0，此时完成LBT过程，则允许接入信道进行通信，退避数值K减至0的时刻即终端装置接入信道的时刻。在退避数值K减至0的过程中，如果终端装置检测的能量高于检测门限时，则信道为繁忙，停止退避，此时LBT过程未完成。直到再次持续34μs检测的能量低于检测门限时，恢复退避，即按照上一次停止退避时的退避数值恢复退避。
在本申请中，侧行通信资源(或简称为资源)指在用于侧行通信的资源池中的时频资源，发送终端装置可以在该资源上发送侧行链路信息。其中，在一个资源上可以承载PSCCH、PSSCH、物理侧行链路反馈信道(physical sidelink feedback channel，PSFCH)和解调参考信号(demodulation reference signal，DMRS)等参考信号中的一种或多种。侧行资源的时域调度单位可以为一个时隙，也可以为一个微时隙，频域调度单位可以为信道或子信道(sub channel)或一个交错资源，也可以为连续的(continuous)或交错的一个或多个RB。
如图4所示，PSCCH可能在每个时隙上的每个子信道中存在，例如，一个PSCCH的时域起始位置为每个时隙上的用于侧行链路通信的第二个符号的起始时刻。本申请中，符号可以是正交频分复用(orthogonal frequency division multiplexing，OFDM)符号(symbol)。PSCCH占用的连续的符号个数可由资源池配置信息或SL BWP配置信息确定，例如为1或2或3个符号等其他不超过14个符号的符号数量。PSCCH的频域起始位置为每个子信道中索引(index)最小的物理资源模块(physical resource block，PRB)，PSCCH占用的RB的数量可由SL资源池配置信息或SL BWP配置信息确定，例如为不超过一个信道或一个子信道的大小的RB数量。另外如图4所示，可选的，每个时隙还可包括用于承载自动增益控制(automatic gain control，AGC)信息的符号，例如，用于承载AGC信息的符号为每个时隙中的第一个符号。
如前述，在NR sidelink系统中，PSFCH用于承载HARQ反馈信息，即承载ACK或NACK反馈信息。数据的接收端UE根据所接收的数据是否正确译码向数据的发送端UE进行反馈。下面结合图5介绍目前的NR发布版本(release)16和17的PSFCH的时频资源确定方式。
以第一终端装置接收第二终端的数据信息，第一终端装置向第二终端发送反馈信息用于应答接收的该数据信息为例，第一终端装置确定发送侧行反馈信息的资源，即PSFCH资源，由以下几个参数共同决定：
1)资源池的资源配置信息，包括资源池中包含的子信道的个数的配置信息，一个子信道中包含的RB的个数的配置信息。
2)接收的第二终端的数据信息所被分配的时隙和所分配的子信道，即该数据信息传输所使用的时域资源和频域资源。
3)资源池中PSFCH资源的时域周期(period)，即每几个时隙存在一个PSFCH资源。例如，图5中的PSFCH Period N＝2(N还可以等于0、1或4)，表示每2个时隙存在一个PSFCH资源。PSFCH资源可位于一个SL时隙的倒数第二个符号和倒数第三个符号，其中倒数第二个符号可以用于PSFCH的接收端进行AGC训练。
4)资源池中PSFCH资源的频域资源，即在该资源中的哪些RB可以用于PSFCH传输，PSFCH传输包括但不限于HARQ应答反馈(即ACK或NACK的反馈)。
5)资源池中PSFCH资源的码域资源，即一个RB上可以复用多少个不同PSFCH序列，具体地，体现在生成PSFCH序列的循环移位(cyclic shift，CS)值上。其中，可以2个不同的CS值为一对(pair)，一对CS分别为ACK序列和NACK序列。PSFCH序列可以为ZC序列。
6)PSFCH和PSSCH的时域间隔(gap)，图5中的PSFCH gap k＝2(k还可以等于3)，为用于第一终端装置处理PSSCH译码和确定PSFCH所承载的内容所需要的时延。
具体的，在资源池中，接收PSSCH的时频资源和对应的PSFCH资源之间的映射关系根据以下方式确定：针对一个PSFCH时域周期，所有满足PSFCH gap且可以映射在该PSFCH时域周期中的PSFCH资源(PSFCH资源是指，PSFCH时隙与PSSCH时隙的间隔不小于PSFCH gap k个时隙的第一个存在PSFCH资源的时隙)的PSSCH时频资源，进行先时域(如时隙按照索引由小到大的顺序排序)后频域(如子信道按照由小到大的顺序排序)的PSSCH资源排序。该PSFCH时域周期中的PSFCH所在的时隙上进行先频域后码域的PSFCH资源排序。将排序后的PSSCH资源和排序后的PSFCH资源进行映射，即任何一个PSSCH时频资源都对应唯一的PSFCH时频码资源。例如图5所示，PSSCH1和PSSCH2分别对应的PSFCH资源的位置在图5中通过箭头指示，PSSCH1和PSSCH2分别对应的PSFCH资源在频域上仅占用一个RB。
根据国家和地区对于使用非授权频段的法规要求，占用信道带宽(occupied channel bandwidth，OCB)应在标称信道带宽的80％到100％之间，该要求称为OCB要求，其中标称信道带宽(nominal channel bandwidth)是分配给单个信道的最宽频率频带，包括保护频带。占用信道带宽是包含信号功率99％的带宽。在5吉赫兹(GHz)频段，单个工作信道的标称信道带宽应为20兆赫兹(MHz)。如果是具有多个发射链的设备智能天线系统，则通信系统的每个发射链都应满足OCB要求。在毫米波频段，例如60GHz频段，OCB要求可能会要求是标称信道带宽的75％或以上。占用的信道带宽可能会随着时间和/或有效负载而变化。
数据的接收节点根据所接收的数据是否正确译码向数据的发送节点进行反馈，其中，数据承载于物理层侧行链路共享信道(physical sidelink shared channel，PSSCH)。而在非授权频段重用目前的NR发布版本(release)16和17的PSFCH的时频资源确定方法不能满足OCB要求，进而无法占用非授权频段进行发送。
基于图5可知，目前PSFCH资源的确定方式不能满足非授权频段的接入机制中的OCB需求，导致第一终端装置在非授权频段不能根据该PSFCH资源进行PSFCH的发送，因此目前的PSFCH发送方式不适用于非授权频段。
本申请实施例提供一种通信方法，用以提供能够适用于非授权频段的PSFCH发送方 式。该通信方法可由第一通信装置和/或第二通信装置实施。
下面结合图6和图7，对本申请实施例提供的第一终端装置和/或第二终端装置可能的结构进行介绍。
示例性的，图6示出了一种可能的第一终端装置和/或第二终端装置的结构示意图，该结构可包括处理模块610和收发模块620。示例性地，图6所示结构可以是终端设备，也可以是应用于终端设备中的芯片或者其他具有本申请所示终端设备功能的组合器件、部件或组件等。当该结构是终端设备时，收发模块620可以是收发器，收发器可以包括天线和射频电路等，处理模块610可以是处理器，例如基带处理器，基带处理器中可以包括一个或多个中央处理单元(central processing unit，CPU)。当该结构是具有本申请所示终端设备功能的部件时，收发模块620可以是射频单元，处理模块610可以是处理器，例如基带处理器。当该结构是芯片系统时，收发模块620可以是芯片，例如基带芯片，的输入输出接口，处理模块610可以是芯片系统的处理器，可以包括一个或多个中央处理单元。应理解，本申请实施例中的处理模块610可以由处理器或处理器相关电路组件实现，收发模块620可以由收发器或收发器相关电路组件实现。
例如，处理模块610可以用于执行本申请任一实施例中由第一终端装置和/或第二终端装置所执行的除了收发操作之外的全部操作，例如处理操作，和/或用于支持本文所描述的技术的其它过程，比如生成由收发模块620发送的消息、信息和/或信令，和对由收发模块620接收的消息、信息和/或信令进行处理。收发模块620可以用于执行本申请任一实施例中由第一终端装置和/或第二终端装置所执行的全部接收和发送操作，和/或用于支持本文所描述的技术的其它过程，例如数据的发送和/或接收。
另外，收发模块620可以是一个功能模块，该功能模块既能完成发送操作也能完成接收操作，例如收发模块620可以用于执行由中继节点和/或远端节点所执行的全部发送操作和接收操作，例如，在执行发送操作时，可以认为收发模块620是发送模块，而在执行接收操作时，可以认为收发模块620是接收模块；或者，收发模块620也可以是两个功能模块，收发模块620可以视为这两个功能模块的统称，这两个功能模块分别为发送模块和接收模块，发送模块用于完成发送操作，例如发送模块可以用于执行由第一终端装置和/或第二终端装置所执行的全部发送操作，接收模块用于完成接收操作，接收模块可以用于执行由第一终端装置和/或第二终端装置所执行的全部接收操作。
图7示出了另一种终端装置的结构示意图，用于执行本申请实施例提供的由第一终端装置和/或第二终端装置执行的动作。便于理解和图示方便。如图7所示，终端装置可包括处理器、存储器、射频电路、天线和/或输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对终端装置进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端装置可以不具有输入输出装置。
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端装置时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。 为便于说明，图7中仅示出了一个存储器和处理器。在实际的终端设备产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端装置的收发单元。收发单元可以是一个功能单元，该功能单元能够实现发送功能和接收功能；或者，收发单元也可以包括两个功能单元，分别为能够实现接收功能的接收单元和能够实现发送功能的发送单元。可以将具有处理功能的处理器视为终端装置的处理单元。如图7所示，终端装置包括收发单元710和处理单元720。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元710中用于实现接收功能的器件视为接收单元，将收发单元710中用于实现发送功能的器件视为发送单元，即收发单元710包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
应理解，收发单元710可与收发模块620对应，或者说，收发模块620可由收发单元710实现。收发单元710用于执行本申请所示实施例中的第一终端装置和/或第二终端装置的发送操作和接收操作，和/或用于支持本文所描述的技术的其它过程。处理单元720可与处理模块610对应，或者说，处理模块610可由处理单元720实现。处理单元720用于执行本申请所示实施例第一终端装置和/或第二终端装置除了收发操作之外的其他操作，例如用于执行本申请所示实施例中由第一终端装置和/或第二终端装置所执行的除接收和发送以外的全部操作，和/或用于支持本文所描述的技术的其它过程。
此外，图6和/或图7所示结构还可用于实现网络设备或网络设备的组件，网络设备如基站、CU或DU等。比如，图6所示处理模块610和/或图7所示的处理单元720可用于实现本申请实施例提供的通信方法中由基站执行的处理步骤和/或除由基站执行的接收和发送以外的操作。图6所示的收发模块620和/或图7所示的收发单元710可用于实现本申请实施例提供的通信方法中由基站执行的接收操作和/或发送操作。如果图7所示结构用于实现网络设备，则该结构可不包括输入输出装置。本申请中为方便说明，可将网络设备或网络设备的组件称为第三通信装置。
应理解，当通过图6和/或图7所示结构实现第一终端装置和/或第二终端装置时，本申请实施例提供的通信方法中的由第一终端装置和/或第二终端装置执行的接收和发送动作可由图6所示的收发模块620和/或图7所示的收发单元710执行；本申请实施例提供的通信方法中的由第一终端装置和/或第二终端装置执行的处理动作，和除接收和发送动作以外的其他动作可由图6所示处理模块610和/或图7所示的处理单元720执行。当通过图6和/或图7所示结构实现网络设备或网络设备中的组件时，本申请实施例提供的通信方法中的由网络设备执行的接收和发送动作可由图6所示的收发模块620和/或图7所示的收发单元710执行；本申请实施例提供的通信方法中的由网络设备执行的处理动作，和除接收和发送动作以外的其他动作可由图6所示处理模块610和/或图7所示的处理单元720执行。
如图8所示，本申请实施例提供的通信方法可包括以下S101至S103所示的步骤：
S101：第二终端装置接入第一信道，并发送第一数据。
可选的，本申请中的接入信道，是指终端装置在该信道完成LBT，或者说LBT成功。例如，终端装置在该信道的LBT过程中，退避数值K减至0。
相应地，第一终端装置接收来自于第二终端装置的第一数据。
可选的，该第一数据承载于PSSCH。
示例性的，第二终端装置可以在接入第一信道后通过PSSCH发送侧行控制信息，该侧行控制信息可用于调度第一数据。当第一终端装置检测到来自于第二终端装置的侧行控制信息后，根据侧行控制信息接收该第一数据。
示例性的，在第二通信装置采用图6所示结构时，S101可通过收发模块620执行。在第二通信装置采用图7所示结构时，S101可通过收发单元710执行。
S102：第一终端装置确定在信道占用时间内的反馈时间单元，该反馈时间单元对应于第一数据。本申请中，反馈时间单元对应第一数据是指，反馈时间单元中可包括用于承载第一数据所对应的反馈信息的反馈资源，或者说，反馈时间单元中的部分或全部资源可用于发送第一数据对应的反馈信息，已实现针对第一数据的HARQ应答反馈。本申请中，反馈资源是指可用于终端装置发送反馈信息的时频资源。
应理解，这里的信道占用时间可由第二终端装置确定。具体的，信道占用时间可以是第二终端装置确定的最大信道占用时间(maximum channel occupancy time，MCOT)，MCOT为第二终端装置最大能够占用第一信道的时间。或者，信道占用时间为第二终端装置实际占用第一信道的时间，称为信道使用时间(channel occupancy time，COT)，此时信道占用时间可以小于或等于该最大占用时间。
可选的，可由第二终端装置向第一终端装置发送信道占用时间的指示信息，由第一终端装置根据该指示信息确定信道占用时间。
例如，第二终端装置在接入第一信道后，根据MCOT确定小于MCOT的一个值作为COT，并通过侧行控制信息或媒体访问控制(media access control，MAC)控制元素(control elment，CE)或PC5RRC信令向第一终端装置指示该COT，包括指示COT的起始位置(例如，COT起始所在的时隙或符号)和/或COT的时长(单位可以是ms或时隙或符号)，则第一终端装置将COT作为信道占用时间。或者，第二终端装置在接入信道后，通过侧行控制信息或MAC控制元素或侧行RRC信息向第一终端装置指示MCOT，则第一终端装置将MCOT作为信道占用时间。
S102也可替换为：第一终端装置确定在MCOT内的反馈时间单元，或者，第一终端装置确定在COT内的反馈时间单元。
可选的，MCOT取决于信道接入等级(channel access priority class)，信道接入等级由终端装置根据待传输数据的业务类型或业务服务质量等级确定。信道接入等级与MCOT之间的对应关系例如表1所示。
信道接入等级 MCOT
1 2毫秒(ms)
2 4ms
3 6ms或10ms
4 6ms或10ms
表1
此后，第一终端装置可根据信道占用时间和子载波间隔信息确定信道占用时间内包含的时隙个数。例如，时隙个数可满足：
N slot＝T×2 μ；
其中，N slot为时隙个数，T为信道占用时间，T＝MCOT，或者T＝COT，μ为子载波间隔信息。也就是说，该信道占用时间内的时间可表示为
Figure PCTCN2022097892-appb-000001
可选的，子载波间隔信息与子载波间隔Δf之间的对应关系如表2所示。
μ Δf＝2 μ·15[千赫兹(Khz)]
0 15
1 30
2 60
3 120
4 240
5 480
6 960
表2
可选的，第一终端装置可从信道占用时间内的时间单元集合中，确定该反馈时间单元。其中，该时间单元集合可包括至少一个时间单元，时间单元集合中的时间单元包含反馈资源。反馈时间单元可属于SL资源池。
应理解，本申请中以1个时间单元为1个时隙为例进行说明，在实际应用中也可将时间单元定义为n个时隙，n大于0。
下面结合附图对于时间单元集合的确定方式进行说明。
方式1
如图9所示，可定义一个COT或MCOT内的时间单元集合的起始时隙为信道占用时间中的第PSFCH 1个时隙，则该时隙可记作
Figure PCTCN2022097892-appb-000002
该第PSFCH 1个时隙与信道占用时间的起始位置之间的时域间隔为X 1(或记为
Figure PCTCN2022097892-appb-000003
)个时隙。这里的时域间隔是指，第PSFCH 1个时隙与信道占用时间的起始位置之间的时隙数量。
可选的，该方式中，一个COT或MCOT内的PSFCH 1所在的位置可以是预定义的，预定义包括在通信标准协议或通信规范中定义的，不需要通过信令或配置或计算而获得的，例如，X 1的值为0、1、2、3、4、5或者6等不超过COT时长所对应的时隙总数的正整数。可选的，X 1可以是预配的，或者X 1是网络设备通过下行控制信息(downlink control information，DCI)或RRC信令或SIB信息或MIB信息指示或配置给第一终端装置的，或者X 1是由第二终端装置通过SCI或PC5RRC信令指示或配置给第一终端装置的。
另外，该方式中，时间单元集合中每两个相邻的时间单元之间的时域间隔为M 1个时隙。如图9所示。M 1的取值可以是预定义的，例如为1、2、3或4等，或者M 1是预配值，或者M 1是由网络设备通过DCI或RRC信令或SIB信息或MIB信息指示或配置给第一终端装置，或者，M 1可以是由第二终端装置通过SCI或PC5RRC信令指示或配置给第一终端装置的。时间单元集合中相邻的时间单元，是指时间单元集合中的逻辑上相邻的两个时间单元，这两个时间单元不一定在物理上相邻，比如图9所示，时间单元集合中相邻的两个时间单元之间包含M 1个不包括反馈资源的时隙，M 1即两个相邻的时间单元之间的时域间隔。
由此第一终端装置可确定该信道占用时间中，则除第PSFCH 1个时隙以外，时间单元集合中的其他时隙的编号为
Figure PCTCN2022097892-appb-000004
其中，
Figure PCTCN2022097892-appb-000005
另外，也可以定义时间单元集合包括的最后一个时隙为信道占用时间中的第PSFCH 2个时隙。该第PSFCH 2个时隙与信道占用时间的结束位置之间的时域间隔为X2(或记为
Figure PCTCN2022097892-appb-000006
)个时隙。
其中，PSFCH 2所在的位置可以是预定义的，例如，X 2的值为N slot、N slot-1、N slot-2、N slot-3、或N slot-4等，或者X 2是预配值，或者X 2由网络设备通过DCI或RRC信令或SIB信息或MIB信息指示或配置给第一终端装置，或者X 2由第二终端装置通过SCI或PC5RRC信令指示或配置给第一终端装置。
由此第一终端装置可确定该信道占用时间中，则除第PSFCH 2个时隙以外，时间单元集合中的其他时隙的编号为
Figure PCTCN2022097892-appb-000007
其中，
Figure PCTCN2022097892-appb-000008
方式2
时间单元集合所包括的时间单元可以由网络设备通过DCI或RRC信令或SIB信息或MIB信息指示或配置给第一终端装置，或由第二终端装置通过SCI或PC5RRC信令指示或配置给第一终端装置。
例如，第一终端装置可接收来自于网络设备或第二终端装置的第一指示信息，该第一指示信息可用于指示时间单元集合所包括的时间单元。
具体来说，第一指示信息可包括比特位图(bitmap)以时间单元是时隙为例，可定义该信道占用时间内的PSFCH资源样图(pattern)，并通过比特位图表示该图样。
示例性的，比特位图可表示为即
Figure PCTCN2022097892-appb-000009
L bitmap为该比特位图的长度。L bitmap的值可以是预定义的，或是预配值，或是由网络设备通过DCI或RRC信令或SIB信息或MIB信息指示或配置给第一终端装置，或是由第二终端装置通过SCI或PC5RRC信令指示或配置给第一终端装置。
可选的，一种情况下，L bitmap＝N slot如图10所示，也就是说，比特位图中的每一位取值指示信道占用时间内一个时隙是否为时间单元集合包括的时间单元。
或者，L bitmap为其他整数值，比如，满足N slotmod L bitmap＝0，也就是说，N slot为L bitmap的整数倍，则当b k′＝1时，编号为
Figure PCTCN2022097892-appb-000010
的时隙属于时间单元集合，其中，b k′为比特位图中第k′个比特位的取值，k′＝k mod L bitmap。如图11所示，一个位图，大小为L bitmap＝4，其中b 3＝1，b 0＝b 1＝b 2＝0(即“0001”的位图)，N slot mod 4＝0，那么，编号为
Figure PCTCN2022097892-appb-000011
……和
Figure PCTCN2022097892-appb-000012
的时隙属于时间单元集合。
方式3
第一终端装置可通过预定义或是预配置时间单元集合所包括的时间单元的方式确定时间单元集合。
例如，预定义时间单元集合中的时间单元为信道占用时间中的最后一个时隙，或者其他时隙。如果时间单元集合中的时间单元为信道占用时间中的最后一个时隙，则此时反馈时间单元为该时隙。
方式4
第一终端装置可根据信道占用时间的长度确定时间单元集合。
例如，信道占用时间小于或等于时间阈值的情况下，默认时间单元集合中的时间单元 为信道占用时间中的最后一个时隙，或者其他时隙。如果时间单元集合中的时间单元为信道占用时间中的最后一个时隙，则此时反馈时间单元为该时隙。
其中，该阈值可以是时间长度，如X ms，或者该阈值可以是X’个时隙的长度。可选的，X和/或X’的取值可以是预定义的，或是预配值，或由网络设备通过DCI或RRC信令或SIB信息或MIB信息指示或配置给第一终端装置，或由第二终端装置通过SCI或PC5RRC信令指示或配置给第一终端装置。
可选的，又例如，当信道占用时间大于时间阈值的情况下，默认时间单元集合中的时间单元包括信道占用时间中的最后一个时隙和正中间的一个奇数或偶数时隙。
应理解，以上方式1至方式4只是示例性的说明，不应理解为确定时间单元集合的全部实现方式。比如，在实际应用中，以上方式1至方式4也可以相互结合实施，例如，在方式4中，信道占用时间小于时间阈值的情况下，默认时间单元集合中的时间单元为信道占用时间中的最后一个时隙，而在信道占用时间大于或等于时间阈值的情况下，可按照方式1至方式3或方式4中的任意一种方式确定时间单元集合中的时间单元。
可选的，第一终端装置在确定时间单元集合中的时间单元后，可根据承载第一数据的时频资源确定反馈时间单元。例如，在确定时间单元集合中包括多个时间单元后，确定满足PSFCH和PSSCH之间的时域间隔要求的时间单元作为反馈时间单元，具体方式可参照本申请中关于图5的说明，这里不再赘述。其中，该时域间隔的单位可以是时隙，例如，时域间隔为1、2或3个时隙。时域间隔的值可以是预定义的，或是预配值，或是由网络设备通过DCI或RRC信令或SIB信息或MIB信息指示或配置给第一终端装置的，或者是由第二终端装置通过SCI或PC5RRC信令指示或配置给第一终端装置的。
应理解，以上反馈时间单元和/或时间单元集合还可由SL BWP配置信息和/或SL资源池配置信息周期性的配置。
示例性的，在第一通信装置采用图6所示结构时，S102可由处理模块610执行。在第一通信装置采用图7所示结构时，S102可由处理单元720执行。
与S102同理，第二终端装置可确定在信道占用时间内的反馈时间单元。其中，该反馈时间单元对应于第一数据。或者说，第二终端装置确定在MCOT内的反馈时间单元，或者，第二终端装置确定在COT内的反馈时间单元。
应理解，本申请不限制第二终端装置确定在信道占用时间内的反馈时间单元的执行时序与S102的执行时序。比如，第二终端装置可以在发送第一数据后执行该反馈时间单元的确定动作，而第一终端装置在接收到第一数据后执行S102，除此之外这两个动作的执行顺序上没有必然的联系。示例性的，第二终端装置在接收第一反馈信息和/或第二反馈信息之前确定对应于第一数据的反馈时间单元，以便于正确接收反馈信息。
其中，信道占用时间为第二终端装置确定的最大信道占用时间，或小于第二终端装置确定的最大信道占用时间。可选的，信道占用时间可由第二终端装置确定，具体可参照S102中的说明。本申请中，可由第二终端装置向第一终端装置发送信道占用时间的指示信息，以指示第二终端装置所确定的信道占用时间。
可选的，第一终端装置可从信道占用时间内的时间单元集合中，确定该反馈时间单元。其中，时间单元集合的确定方式可参照S102中时间单元集合的确定方式。
例如，对应于S102中确定时间单元集合的方式1，对于第二终端装置来说，X 1、X 2和M 1中的至少一个可以是预配的，或者X 1是网络设备通过DCI或RRC信令或SIB信息或 MIB信息指示或配置给第二终端装置的，或者，X 1、X 2和M 1中的至少一个可以是由第二终端装置确定并通过SCI或PC5RRC信令指示或配置给第一终端装置的。X 1、X 2和M 1的含义可参照S102中方式1的说明。
又如，对应于S102中确定时间单元集合的方式2，时间单元集合所包括的时间单元可以是由网络设备通过DCI或RRC信令或SIB信息或MIB信息指示或配置给第二终端装置，或由第二终端装置确定并通过SCI或PC5RRC信令指示或配置给第一终端装置的。比如，第二终端装置可接收来自于网络设备的第二指示信息，根据第二指示信息从信道占用时间包括的时间单元中确定反馈时间单元。第二指示信息例如是比特位图，通过比特位图指示时间单元集合的方式可参照方式2中的说明。
再如，对应于S102中确定时间单元集合的方式3，第二通信装置可通过预定义或是预配置时间单元集合所包括的时间单元的方式确定时间单元集合。
再如，对应于S102中确定时间单元集合的方式4，第二通信装置可根据信道占用时间的长度确定时间单元集合，比如在信道占用时间小于或等于时间阈值的情况下，第二终端装置默认时间单元集合中的时间单元为信道占用时间中的最后一个时隙。
可选的，第二终端装置在确定时间单元集合中的时间单元后，可根据承载第一数据的时频资源确定反馈时间单元，比如，第二终端装置可确定满足PSFCH和PSSCH之间的时域间隔要求的时间单元作为反馈时间单元。
第二终端装置确定反馈时间单元的方式可参照S102中第一终端装置确定时间单元集合，向第一终端装置发送第一指示信息，该第一指示信息可用于指示时间单元集合所包括的时间单元。
应理解，第二终端装置还可根据SL BWP配置信息和/或SL资源池配置信息获得周期性配置的反馈时间单元和/或时间单元集合。
可选的，第二终端装置所确定的确定反馈时间单元与S102中第一终端装置确定的反馈时间单元相同。
示例性的，在第二通信装置采用图6所示结构时，反馈时间单元和/或时间单元集合的确定动作可由处理模块610执行。在第二通信装置采用图7所示结构时，反馈时间单元和/或时间单元集合的确定动作可由处理单元720执行。
S103：第一终端装置接入第一信道，在反馈时间单元中的第一频域资源上发送第一反馈信息，在反馈时间单元中的第二频域资源上发送第二反馈信息。第一频域资源与第二频域资源不重叠，或者说，第一频域资源与第二频域资源不包括相同的RB。
其中，第一频域资源和第二频域资源属于所述第一信道，第一频域资源为根据承载第一数据的时频资源确定的。
第一反馈信息为针对第一数据的有效的反馈信息，包括ACK或NACK，用于指示第一数据是否正确接收。可选的，第一反馈信息还可包括但不限于CSI反馈信息，用于指示信道状态，包括预编码矩阵指示(pre-coding matrix indicator，PMI)反馈，秩指示(rank indication，RI)反馈，信道质量指示(channel quality indicator，CQI)反馈等。
此外，第一反馈信息还可包括节能信息，如唤醒指示信息或休眠指示信息，唤醒指示信息可用于唤醒UE接收至少PSCCH信息，休眠指示信息可指示UE可以进入休眠状态不接收PSCCH信息。第一反馈信息还可包括资源辅助信息，资源辅助信心例如用于指示推荐使用的资源的信息、用于指示不推荐使用的资源的信息、用于指示资源碰撞的信息、用 于指示资源预约冲突的信息，或者用于指示过去发生了或未来即将发生半双工冲突的信息等。
应理解，本申请中，有效的反馈信息是指，反馈信息至少用于指示侧行链路信息的接收端对于侧行链路信息的接收情况，该反馈信息需要侧行链路信息的发送端进行接收。
第二反馈信息可以是第一反馈信息的复制信息，或者可承载固定信息(或者说，第二反馈信息可以是预定义的比特之)，例如，第二反馈信息为“0”或“1”或其他不具备实际意义的信息，因为第二频域资源的占用是为了满足未授权频段的OCB要求，只需要按照一定的功率进行发送即可。第二反馈信息可称为无效的反馈信息，无效的反馈信息是指，该反馈信息仅用于占用信道，因此侧行链路信息的发送端可以不接收和/或接收并弃置该反馈信息。
可选地，本申请中，第一终端装置即使不需要在第二频域资源发送第一反馈信息，也仍需要在第二频域资源发送第二反馈信息，其目的是在COT内占用第一信道，以防止该第一信道被其他用户抢占。具体地，所述第一终端装置接入第一信道，并在时间单元集合中的每一个时间单元的第二频域资源上发送第二反馈信息，所述每一个时间单元中的时间单元包含反馈资源。不需要第一反馈信息的情况包括以下至少一种：在只有NACK反馈的HARQ反馈机制中第一终端装置正确接收了第一数据、第一终端装置因为优先级弃置第一反馈信息(即第一终端装置需要发送其他优先级更高的信息而弃置第一反馈信息)或第一终端装置没有正确译码侧行控制信息(即第一终端装置不知道需要发送第一反馈信息)等。应理解，第二频域资源是公用给所有接入第一信道的终端设备的用于发送第二反馈信息的，不限于第一终端设备。
可选地，这里的第一信道可属于SL BWP、SL资源池或SL资源池中的子信道。其中，SL BWP可以是根据SL BWP配置信息确定的资源。SL资源池可以是根据SL资源池配置信息确定的资源。
下面结合附图介绍第一频域资源和第二频域资源的确定方式。其中，由于第一频域资源可能是根据第二频域资源确定的，这里介绍时先介绍第二频域资源的确定方式，但不代表第二频域资源的确定过程先于第一频域资源的确定过程执行。
(1)关于第二频域资源
本申请中，第二频域资源可包括两个不连续的资源块，这两个不连续的资源块之间的频域间隔为Offset个资源块，这两个资源块可以分别是第二频域资源中的第一个资源块和最后一个资源块。这里的频域间隔是指这两个不连续的资源块之间的资源块的数量。
可选的，(Offset+2)个资源块对应的带宽大于或等于第一信道的带宽与第一系数的乘积，或者说，第二频域资源对应的带宽大于或等于第一信道的带宽与第一系数的乘积，其中，第一系数大于0且小于1。例如，0.8＜第一系数＜1。可选的，第一系数为满足OCB需求的占用第一带宽的最小比例。该设计的目的是，使得第一终端装置通过第二频域资源发送第二反馈信息满足OCB的要求。可选的，第二频域资源还可包括这两个不连续的资源块之间的至少一个资源块。
下面说明第二频域资源的确定方式。
本申请中，第二频域资源可以由网络设备指示，或者是预配置的，或者是预定义的。因此，第二频域资源可以独立于NR release 16和17的PSFCH的时频资源进行配置。例如， 可通过网络设备指示、预配置或者预定义的方式，向多个终端装置配置相同的第二频域资源，因此多个第二终端装置可以在相同的第二频域资源发送第二反馈信息，实现多个终端装置对于同一信道的占用。
一种可能的确定方式中，可确定SL资源池中包括的交错资源，该资源池包括第一信道，即资源池的频域资源大于或等于第一信道的频域资源。示例性的，一个SL资源池可包括M个子信道，一个子信道对应一个交错资源，即子信道个数和交错资源个数相等且子信道与交错资源之间一一对应，例如第一个子信道对应第一个交错资源，以此类推。此时，第一终端装置可通过网络设备指示、预配置或者预定义的方式确定SL资源池中包括的交错资源。
或者，一个SL资源池包括M个交错资源。资源池中的交错资源的索引(或序号或编号)为0至M-1。可选地，一个SL资源池包括N个子信道，可确定N个子信道中的至少一个子信道包括第一信道，即子信道的频域资源大于或等于第一信道的频域资源，其中每个子信道里包括M个交错资源，在每个子信道中的交错资源的索引为0至M-1。
该方式中，第二频域资源为第一信道的第m个交错资源，该交错资源包含至少两个在频域上交错的资源块，其中m为大于或等于1，且，小于或等于第一信道中交错资源的总数的整数，其中，m的取值是预定义的，或是预配值，或是由网络设备通过DCI或RRC信令或SIB信息或MIB信息指示或配置给第一终端装置的。因此，可由网络设备指示，或者通过预配置的方式或者通过预定义的方式使得第一终端装置确定第一信道的第m个交错资源为第二频域资源。
例如图12所示，交错资源#1作为第二频域资源。可选的，图12中交错资源#1所包含的全部PRB为第二频域资源，或者，交错资源#1所包含的索引最小的资源块和索引最大的资源块为第二频域资源。
另一种可能的实现方式中，第二频域资源的第一个资源块可以是第一信道中的第N1(或描述为
Figure PCTCN2022097892-appb-000013
)个资源块，该第N1个资源块可以是从RB索引最大或最小开始标记的第N1个资源块，第二频域资源的最后一个资源块可以是第一信道中的第N2(或描述为
Figure PCTCN2022097892-appb-000014
)个资源块，该第N2个资源块可以是从RB索引最大或最小开始标记的第N2个资源块。其中，N1和N2为正整数，且，N1、N2的取值可以是预定义、网络设备指示或预配置的。可选的，N1和N2之间的差值为Offset，因此可通过N1和N2的取值，使得第二频域资源对应的带宽大于或等于第一信道的带宽与第一系数的乘积。
应理解，这里所述的第二频域资源的第一个资源块，可以是按照资源块的编号由大到小排列时，编号最小的资源块，也可以说，第一个资源块是第二频域资源中频率最低的资源块。第二频域资源的最后一个资源块可以是按照资源块的编号由大到小排列时，编号最大的资源块，也可以说，最后一个资源块是第二频域资源中频率最高的资源块。可以理解的，编号的大小是相对在第一信道中的。因此，可由网络设备指示，或者通过预配置的方式或者通过预定义的方式，使得第一终端装置确定第N1个资源块为第二频域资源的第一个资源块且第N2个资源块为第二频域资源的最后一个资源块。
例如，N1＝N2＝1，即第二频域资源的第一个资源块为第一信道中的RB索引最小的资源块，第一频域资源的最后一个资源块为第一信道中的RB索引最大的资源块。N1和N2的取值可以相等，也可以不等，只要满足OCB要求即可。此时如图13所示，第二频域资源可以由第一信道中的第一个PRB和最后一个PRB组成。
可选的，以上第一反馈信息和/或第二反馈信息占用反馈时间单元所在时隙的最后两个符号。或者，第一反馈信息和/或第二反馈信息在反馈时间单元的最后一个符号为空闲符号(gap symbol)的情况下，占用反馈时间单元所在时隙的倒数第二和倒数第三个符号。又或者，第一反馈信息和/或第二反馈信息占用反馈时间单元所在时隙的前两个符号，如图14所示，以反馈时间单元为信道占用时间的最后一个时隙为例，第一反馈信息和/或第二反馈信息占用该时隙的前两个符号。第一反馈信息和/或第二反馈信息也可以占用反馈时间单元所在时隙的其他符号。
(2)第一频域资源
可选的，第一终端装置可根据承载第一数据的时频资源对应的交错资源的索引和/或个数和第一数据对应的标识(identifier，ID)信息确定第一频域资源。定义时间单元集合中每
Figure PCTCN2022097892-appb-000015
个时间单元存在反馈资源，时间单元可以是时隙。
Figure PCTCN2022097892-appb-000016
的确定方法可以采用S102的方式，即确定时间单元集合。承载第一数据的时频资源在时域上可包括第一数据所在的时隙i，
Figure PCTCN2022097892-appb-000017
在频域上可根据交错资源的索引j和/或个数N interlace确定，因此可称索引j和/或个数N interlace为承载第一数据的时频资源对应的交错资源的索引和/或个数，其中，0≤j<N interlace，N interlace表示在一个资源池的或一个子信道中的交错资源个数。
示例性的，第一数据对应的ID信息可包括第一数据的源ID信息和/或目标ID信息。其中，第一数据的源ID信息可包括第二终端装置的标识、发起第一数据所属业务的终端装置的标识或发送第一数据的终端装置的标识。第一数据的目标ID信息可包括第一终端装置的标识、接收第一数据所属业务的终端装置的标识或接收第一数据的终端装置的标识。
具体来说，ID信息可以是层一(layer-1)ID信息，即物理层ID信息，承载于物理层控制信令如SCI中，包括目的ID(destination ID)，记作Dest ID和源ID(source ID)记作Src ID。ID信息也可以是层二(layer-2)ID信息，即MAC层ID信息，承载于MAC CE中，包括目的ID和源ID。层一ID信息是层二ID信息的至少一部分信息，即层二ID信息包括完整的目的ID和源ID，层一ID信息承载一部分层二ID信息，例如，层二目的ID的长度为24比特，层一目的ID为层二目的ID的前16比特，层二源ID的长度为24比特，层一源ID为层二源ID的前8比特信息。上述8、16和24比特只是一种示例，在实际应用中可以为其他正整数，满足层二ID(包括源ID和目的ID)的比特数大于或等于层一ID的比特数即可。
应理解，ID信息可以用于标识终端设备，或者说，这里第一数据对应的ID信息可以是与第一终端装置和/或第二终端装置有关的标识；也可以用于标识数据或数据的业务，或者说，ID信息可以是与第一数据和/或第一数据所属业务有关的标识，此时ID信息可由应用(application，APP)层分配，从物理层角度，每个PSSCH可以有对应的层一ID信息，承载于对应的SCI中。
在另外的示例中，ID信息还包括组播中的UE标识，即表示针对一个组播业务或组播通信，该UE在该组播业务或组播通信中的唯一的标识M ID。
示例性的，第一终端装置可根据
Figure PCTCN2022097892-appb-000018
承载第一数据的时频资源、第一反馈信息的可用码域资源
Figure PCTCN2022097892-appb-000019
或可用于传输PSFCH的RB资源集
Figure PCTCN2022097892-appb-000020
中的至少一个信息，确定第一频域资源所在的RB编号。
其中，第一反馈信息的可用码域资源可以是可用CS对的数量，例如1、2、4或6对，第一终端装置可从CS对中确定第一反馈信息对应的CS对。可用于传输PSFCH的RB资源集可以是第一频域资源和/或第二频域资源可能的RB的集合。可用CS对的数量和/或可用于传输PSFCH的RB资源集，可以是预定义的，或是预配的，或是由网络设备通过DCI、RRC信令或SIB指示给第一终端装置的，或者是由第二终端装置通过SCI或PC5RRC信令指示给第一终端装置的。
可选的，在S103的实施中，第一终端装置还可根据第一码域资源，在反馈时间单元中的第一频域资源上发送第一反馈信息，其中，第一码域资源为根据承载第一数据的时频资源对应的交错资源的索引和/或个数，和第一数据对应的标识信息确定的。例如，第一终端装置可从第一反馈信息对应的CS对中确定与第一频域资源确定的第一码域资源，用于通过第一码域资源在反馈时间单元中的第一频域资源上发送第一反馈信息。
具体的，第一终端装置可根据以下方式确定第一频域资源和/或第一码域资源。
步骤1)
第一终端装置可从
Figure PCTCN2022097892-appb-000021
对应的PRB中，按照先升序排列i，再升序排列j的原则确定编号为
Figure PCTCN2022097892-appb-000022
的PRB作为在时隙i和子信道j接收的PSSCH所对应的第一频域资源的候选资源所在RB的编号范围，其中，i为第一数据所在的时隙，j为交错资源的索引。
或者说，确定从
Figure PCTCN2022097892-appb-000023
中编号从
Figure PCTCN2022097892-appb-000024
到
Figure PCTCN2022097892-appb-000025
Figure PCTCN2022097892-appb-000026
的RB，用于反馈在时隙i和interlace j上接收的PSSCH。
其中，
Figure PCTCN2022097892-appb-000027
步骤2)
第一终端装置可确定用于反馈PSSCH的PSFCH频域和码域总资源的数量
Figure PCTCN2022097892-appb-000028
可选的，
Figure PCTCN2022097892-appb-000029
满足：
Figure PCTCN2022097892-appb-000030
PSFCH资源类型
Figure PCTCN2022097892-appb-000031
的取值有两种，可以是预配置的，配置的，或预定义的。当
Figure PCTCN2022097892-appb-000032
时，
Figure PCTCN2022097892-appb-000033
关联到对应PSSCH的所分配的索引最小的交错资源。当
Figure PCTCN2022097892-appb-000034
时，
Figure PCTCN2022097892-appb-000035
关联到对应PSSCH的所分配的全部的交错资源，其中，
Figure PCTCN2022097892-appb-000036
是对应的PSSCH所分配的总的交错资源的数量。
步骤3)
按照第一资源排序原则对
Figure PCTCN2022097892-appb-000037
进行排序并编号，进而获得PSFCH频域和码域总资源以及PSFCH资源编号，其中，第一资源排序原则包括先频域再码域，或者先码域再频域，这里不做限定。根据ID信息(记作ID)和
Figure PCTCN2022097892-appb-000038
确定的PSFCH资源编号来确定第一频域资源和第一码域资源，具体地，通过
Figure PCTCN2022097892-appb-000039
得到PSFCH资源编号，其中，ID表示第一数据对应的标识信息，根据PSFCH资源编号和第一资源排序原则确定第一频域资源和第一码域资源。
可选的，ID＝Src ID，或ID＝Dest ID，或ID＝M ID，或ID＝Src ID+M ID，或ID＝Dest ID+M ID，或ID＝Src ID+Dest ID+M ID。
需要理解的，第一信道中可用于传输PSFCH的RB资源集可以不包括第二频域资源，则PSFCH资源可用于第二频域资源的传输。第一资源的传输不属于PSFCH。另一种可能的实现方式，第一信道中可用于传输PSFCH的RB资源集包括第一频域资源和第二频域资源，则PSFCH资源既可以用于第一反馈信息的传输，也可以用于第二反馈信息的传输。
示例性的，在第一通信装置采用图6所示结构时，S101可通过收发模块620执行。在第一通信装置采用图7所示结构时，S101可通过收发单元710执行。其中，在第一通信装置采用图6所示结构时，确定第一码域资源、第一频域资源和第二频域资源的动作可由处理模块610执行。在第一通信装置采用图7所示结构时，确定第一码域资源、第一频域资源和第二频域资源的动作可由处理单元720执行。
在S103中相对应的，第二终端装置可在反馈时间单元中的第一频域资源上接收第一反馈信息。其中，第一频域资源为根据承载第一数据的时频资源确定的。第一反馈信息是针对第一数据的有效的反馈信息，第一反馈信息的说明可参见上文的描述。
第二终端装置在反馈时间单元中的第一频域资源上接收第一反馈信息的实现方式例如，第二终端装置可在第一频域资源上检测第一反馈信息。
可选的，第二终端装置在反馈时间单元中的第一频域资源上接收第一反馈信息之前，第二终端装置确定第一频域资源，进一步可选的，第二终端装置还可确定第二频域资源。该第二频域资源用于接收第二反馈信息，第二反馈信息可以是第一反馈信息的复制信息或预定义的比特流。第二终端装置确定第一频域资源的方式可参照S103中第一终端装置确定第一频域资源的说明，第二终端装置确定第二频域资源的方式可参照S103中第一终端装置确定第二频域资源的说明。
其中，第二频域资源可包括两个不连续的资源块，这两个不连续的资源块之间的频域间隔为Offset个资源块，这两个资源块可以分别是第二频域资源中的第一个资源块和最后一个资源块。这里的频域间隔是指这两个不连续的资源块之间的资源块的数量。可选的，(Offset+2)个资源块对应的带宽大于或等于第一信道的带宽与第一系数的乘积，第一系数大于0且小于1。
可选的，第二频域资源可以由网络设备指示，或者是预配置的，或者是预定义的。例如，由网络设备指示，或者通过预配置的方式或者预定义的方式使得第二终端装置确定第一信道的第m个交错资源为第二频域资源，m的含义可参见S103中的说明。又如，由网络设备指示，或者通过预配置的方式或者通过预定义的方式，使得第二终端装置确定第N1个资源块为第二频域资源的第一个资源块且第N2个资源块为第二频域资源的最后一个资源块，N1和N2的含义可参见S103中的说明。
可选的，第二终端装置可根据承载第一数据的时频资源对应的交错资源的索引和/或个数和第一数据对应的ID信息确定第一频域资源。其中，承载第一数据的时频资源对应的交错资源的索引、个数和第一数据对应的ID信息，可参照S103中的说明。
在一些实施例中，第二终端装置还可根据第一码域资源，在反馈时间单元中的第一频域资源上接收第一反馈信息，其中，第一码域资源为根据承载第一数据的时频资源对应的交错资源的索引和/或个数，和第一数据对应的标识信息确定的。
例如，第二终端装置可参照步骤1)至步骤3)确定第一频域资源和/或第一码域资源。
可选的，第二终端装置还可在反馈时间单元中的第二频域资源上接收第二反馈信息。例如，第二终端装置可在第二频域资源上盲检第二反馈信息。其中，第二终端装置在接收 到第二反馈信息后，可弃置第二反馈信息。第二终端装置也在第二频域资源上不对第二反馈信息进行检测。
应理解，本申请不限制第二终端装置在反馈时间单元中的第一频域资源上接收第一反馈信息的执行时序与S103的执行时序。另外，不限定第一终端装置确定第一频域资源和第二终端装置确定第一频域资源的时序关系，不限定第一终端装置确定第二频域资源和第二终端装置确定第二频域资源的时序关系。
示例性的，在第二通信装置采用图6所示结构时，第二终端装置在反馈时间单元中的第一频域资源上接收第一反馈信息的动作可通过收发模块620执行。在第二通信装置采用图7所示结构时，第二终端装置在反馈时间单元中的第一频域资源上接收第一反馈信息的动作可通过收发单元710执行。其中，在第二通信装置采用图6所示结构时，确定第一码域资源、第一频域资源和/或第二频域资源的动作可由处理模块610执行。在第二通信装置采用图7所示结构时，确定第一码域资源、第一频域资源和/或第二频域资源的动作可由处理单元720执行。
采用图8所示方法，第一终端装置可在反馈时间单元中的第一频域资源和第二频域资源发送反馈信息，其中，反馈时间单元是根据信道占用时间内的对应于第一数据的时间单元，因此该反馈信息的发送过程可以增加反馈信息占用的频域带宽，使得第一终端装置的侧行链路信息反馈过程满足非授权频段对于信道接入的要求，因此，通过PSFCH发送HARQ信息的反馈机制能够使用在非授权频段，以提高非授权频段下SL系统的通信可靠性。
基于图8所示方法，如图15所示，接入第一信道的第一终端装置可在反馈时间单元中的第一频域资源(图15中的PSFCCH频域资源1)上向第二终端装置发送第一反馈信息，以及在反馈时间单元中的第二频域资源(图15中的PSFCCH频域资源2)上向第二终端装置发送第二反馈信息。
另外，如图15所示，除第一终端装置以外的其他终端装置可通过该反馈时间单元发送反馈信息，其他终端装置包括但不限于图中示出的第三终端装置和第四终端装置。可选的，包括第一终端装置在内，这些终端装置均可在第二频域资源发送反馈信息，以及，包括第一终端装置在内的各个终端装置，分别在各自的第一频域资源发送针对各自的侧行链路信息的有效的反馈信息。
例如图15所示，第三终端装置可通过PSFCH资源3发送第三反馈信息，以及通过PSFCH资源2发送第四反馈信息。其中，第三终端装置可以接收来自于第三终端装置以外的任一终端装置(如第五终端装置)的侧行链路信息(例如包括第二数据)，并通过第三反馈信息发送针对该侧行链路信息对应的ACK或NACK。第四反馈信息可以是无效的反馈信息。应理解，第三终端装置确定PSFCH资源3的方式，可参照第一终端装置确定第一频域资源的方式，第三终端装置确定PSFCH资源2的方式，可参照第一终端装置确定第二反馈资源的方式。同理，第四终端装置可在PSFCH资源4发送有效的反馈信息，以及在PSFCH资源2发送无效的反馈信息。这里所举例的有效的反馈信息可参照本申请中对于第一反馈信息的描述，无效的反馈信息可参照本申请中对于第二反馈信息的描述。
可选的，图15中，第一终端装置、第三终端装置以及第四终端装置分别的侧行链路信息可通过交错资源发送，因此可以由分别向第一终端装置至第四终端装置发送侧行链路信息的至少一个终端装置占用第一信道。
基于相同的发明构思，本申请实施例还提供一种通信装置，用于实现以上由第一终端装置和/或第二终端装置实现的功能。该装置可包括图6和/或图7所示结构。
在通过图6所示结构实现本申请实施例提供的第一通信装置时，收发模块620可用于接收来自第二终端装置的第一数据。处理模块610可用于确定在信道占用时间内的反馈时间单元。反馈时间单元可参见上述方法实施例部分的说明。收发模块620还可用于接入第一信道，并在该反馈时间单元中的第一频域资源上发送第一反馈信息，以及在该反馈时间单元中的第二频域资源上发送第二反馈信息。第一反馈信息、第一频域资源和第二频域资源可参见上述方法实施例部分的说明。
在一种可能的设计中，处理模块610还可用于确定用第一频域资源。
在一种可能的设计中，收发模块620还可用于接收来自于该第二终端装置的该信道占用时间的指示信息。
在一种可能的设计中，该第二频域资源可以是由网络设备指示的，或预配置的，或预定义的。如果是由网络设备指示的，则收发模块620还可用于接收第二频域资源的指示信息。
在一种可能的设计中，该第二频域资源为该第一信道中的第m个交错资源，该交错资源包含至少两个在频域上交错的资源块，其中m为整数，该m大于或等于1，且，小于或等于该第一信道中包括的交错资源的总数。其中，m的取值是预定义的、网络设备指示的或预配置的。如果是网络设备指示的，收发模块620还可用于接收m的取值的指示信息。
在一种可能的设计中，该第二频域资源的第一个资源块为该第一信道中的第N1个资源块，该第二频域资源的最后一个资源块为该第一信道中的第N2个资源块，其中，N1和N2为正整数，并且，N1和/或N2的取值是预定义的、网络设备指示的或预配置的。如果是网络设备指示的，收发模块620还可用于接收N1的取值和/或N2的取值的指示信息。
在一种可能的设计中，处理模块610还可用于根据该承载该第一数据的时频资源对应的交错资源的索引和/或个数，和该第一数据对应的标识信息确定该第一频域资源。
在一种可能的设计中，收发模块620具体可用于该第一终端装置根据第一码域资源，在该反馈时间单元中的第一频域资源上发送第一反馈信息，该第一码域资源为根据该承载该第一数据的时频资源对应的交错资源的索引和/或个数，和该第一数据对应的标识信息确定的。其中，处理模块610可用于确定第一码域资源。
在一种可能的设计中，处理模块610可用于根据该承载该第一数据的时频资源，从时间单元集合中确定该反馈时间单元，该时间单元集合包括至少一个时间单元，该至少一个时间单元中的时间单元包含反馈资源。
在一种可能的设计中，时间单元集合中的第一个该时间单元的起始位置与该信道占用时间的起始位置之间的时域间隔可以是X 1个时间单元，该时间单元集合中的每两个相邻的该时间单元之间的时域间隔可以是M 1个时间单元，其中，X 1和M 1可以是预定义的、网络设备指示的、第二终端装置指示的或预配置的，X 1为大于或等于0的正整数，M 1为大于或等于0的正整数。如果是网络设备指示的，收发模块620还可用于接收X 1和/或M 1的取值的指示信息。
在一种可能的设计中，处理模块610可用于根据接收的第一指示信息从该信道占用时间包括的时间单元中，确定该时间单元集合，该第一指示信息来自于网络设备或该第二终 端装置。收发模块620还可用于接收第一指示信息。
在一种可能的设计中，处理模块610可用于在该信道占用时间小于时间阈值的情况下，确定该反馈时间单元可以是该信道占用时间中的最后一个时间单元。
在通过图7所示结构实现本申请实施例提供的第一通信装置时，以上示例中由处理模块610执行的动作可由图7所示的处理单元720执行，不再赘述。同理，以上由收发模块620执行的第一通信装置的动作可由图7所示的收发单元710执行。
在通过图6所示结构实现本申请实施例提供的第二通信装置时，收发模块620可用于接入第一信道，并向第一终端装置发送第一数据。处理模块610可用于确定在信道占用时间内的反馈时间单元。收发模块620还可用于在该反馈时间单元中的第一频域资源上接收第一反馈信息。
在一种可能的设计中，处理模块610还可用于确定用第一频域资源。
在一种可能的设计中，收发模块620还可用于接收并弃置第二反馈信息。处理模块610还可用于确定用于承载第二反馈信息的第二频域资源。
在一种可能的设计中，该第二频域资源可以是由网络设备指示的，或预配置的，或预定义的。如果是由网络设备指示的，则收发模块620还可用于接收第二频域资源的指示信息。
在一种可能的设计中，该第二频域资源为该第一信道中的第m个交错资源，该交错资源包含至少两个在频域上交错的资源块，其中m为整数，该m大于或等于1，且，小于或等于该第一信道中包括的交错资源的总数。其中，m的取值是预定义的、网络设备指示的或预配置的。如果是网络设备指示的，收发模块620还可用于接收m的取值的指示信息。
在一种可能的设计中，该第二频域资源的第一个资源块为该第一信道中的第N1个资源块，该第二频域资源的最后一个资源块为该第一信道中的第N2个资源块，其中，N1和N2为正整数，并且，N1和/或N2的取值是预定义的、网络设备指示的或预配置的。如果是网络设备指示的，收发模块620还可用于接收N1的取值和/或N2的取值的指示信息。
在一种可能的设计中，收发模块620还可用于向第一终端装置发送信道占用时间的指示信息。
在一种可能的设计中，处理模块610还可用于根据该承载该第一数据的时频资源对应的交错资源的索引和/或个数，和该第一数据对应的标识信息确定该第一频域资源。
在一种可能的设计中，收发模块620具体可用于该第一终端装置根据第一码域资源，在该反馈时间单元中的第一频域资源上接收第一反馈信息，该第一码域资源为根据该承载该第一数据的时频资源对应的交错资源的索引和/或个数，和该第一数据对应的标识信息确定的。其中，处理模块610可用于确定第一码域资源。
在一种可能的设计中，处理模块610可用于根据该承载该第一数据的时频资源，从时间单元集合中确定该反馈时间单元，该时间单元集合包括至少一个时间单元，该至少一个时间单元中的时间单元包含反馈资源。
在一种可能的设计中，时间单元集合中的第一个该时间单元的起始位置与该信道占用时间的起始位置之间的时域间隔可以是X 1个时间单元，该时间单元集合中的每两个相邻的该时间单元之间的时域间隔可以是M 1个时间单元，其中，X 1和M 1可以是预定义的、网络设备指示的、第二终端装置指示的或预配置的，X 1为大于或等于0的正整数，M 1为大于或等于0的正整数。如果是网络设备指示的，收发模块620还可用于接收X 1和/或M 1的取值 的指示信息。
在一种可能的设计中，收发模块620还可用于向第一终端装置发送第一指示信息，该第一指示信息用于该第一终端装置从该信道占用时间包括的时间单元中，确定该时间单元集合。
在一种可能的设计中，处理模块610可用于根据接收的第二指示信息从该信道占用时间包括的时间单元中，确定该时间单元集合，该第二指示信息来自于网络设备。收发模块620还可用于接收第二指示信息。
在一种可能的设计中，处理模块610可用于在该信道占用时间小于时间阈值的情况下，确定该反馈时间单元可以是该信道占用时间中的最后一个时间单元。
在通过图7所示结构实现本申请实施例提供的第二通信装置时，以上示例中由处理模块610执行的动作可由图7所示的处理单元720执行，不再赘述。同理，以上由收发模块620执行的第二通信装置的动作可由图7所示的收发单元710执行。
应理解，装置实施例中出现的各个术语以及各种可能的实现方式的细节可以参考上述方法实施例中的描述或解释，此处不再赘述。
本申请实施例提供一种通信系统。该通信系统可以包括上述实施例所涉及的第一终端装置和/或第二终端装置。可选的，该通信系统可包括图1至图2中任一所示结构。该通信装置可用于实现图8所示的通信方法中由第一终端装置和/或第二终端装置实现的步骤。
本申请实施例还提供一种计算机可读存储介质，计算机可读存储介质用于存储计算机程序，该计算机程序被计算机执行时，计算机可以实现上述方法实施例提供的图8所示的实施例中与第一终端装置和/或第二终端装置相关的流程。
本申请实施例还提供一种计算机程序产品，计算机程序产品用于存储计算机程序，该计算机程序被计算机执行时，计算机可以实现上述方法实施例提供的图8所示的实施例中与第一终端装置和/或第二终端装置相关的流程。
本申请实施例还提供一种芯片或芯片系统(或电路)，该芯片可包括处理器，该处理器可用于调用存储器中的程序或指令，执行上述方法实施例提供的图8所示的实施例中与第一终端装置和/或第二终端装置相关的流程。该芯片系统可包括该芯片，还可存储器或收发器等其他组件。
需要说明的是，上述实施例中的通信装置可以是终端设备，也可以是应用于终端设备中的芯片或者其他可实现上述终端设备功能的组合器件、部件等。当通信装置是终端设备时收发单元可以是发送器和接收器，或整合的收发器，可以包括天线和射频电路等，处理单元可以是处理器，例如基带芯片等。当通信装置是具有上述终端设备功能的部件时，收发单元可以是射频单元，处理单元可以是处理器。当通信装置是芯片系统时，收发单元可以是芯片系统的输入输出接口、处理单元可以是芯片系统的处理器，例如：中央处理单元(central processing unit，CPU)。
可以理解的是，本申请的实施例中的处理器可以是CPU，还可以是其它通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
本申请的实施例中的方法步骤可以通过硬件的方式来实现，也可以由处理器执行软件 指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器、闪存、只读存储器、可编程只读存储器、可擦除可编程只读存储器、电可擦除可编程只读存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于第一终端装置和/或第二终端装置中。当然，处理器和存储介质也可以作为分立组件存在于网络设备或终端设备中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序或指令。在计算机上加载和执行所述计算机程序或指令时，全部或部分地执行本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其它可编程装置。所述计算机程序或指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序或指令可以从一个网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是集成一个或多个可用介质的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，例如，软盘、硬盘、磁带；也可以是光介质，例如，数字视频光盘；还可以是半导体介质，例如，固态硬盘。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。在本申请的文字描述中，字符“/”，一般表示前后关联对象是一种“或”的关系；在本申请的公式中，字符“/”，表示前后关联对象是一种“相除”的关系。
本申请实施例中，“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，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，是指的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、b和c，其中a、b、c可以是单个，也可以是多个。
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定。

Claims (69)

  1. 一种通信方法，其特征在于，包括：
    第一终端装置接收来自第二终端装置的第一数据；
    所述第一终端装置确定在信道占用时间内的反馈时间单元，所述反馈时间单元对应所述第一数据；
    所述第一终端装置接入第一信道，在所述反馈时间单元中的第一频域资源上发送第一反馈信息，并在所述反馈时间单元中的第二频域资源上发送第二反馈信息；其中，
    所述第一反馈信息为针对所述第一数据的确认应答或否定应答，所述第一频域资源为根据承载所述第一数据的时频资源确定的，所述第一频域资源和所述第二频域资源属于所述第一信道，且所述第一频域资源与所述第二频域资源不重叠。
  2. 如权利要求1所述的方法，其特征在于，
    所述信道占用时间为所述第二终端装置确定的最大信道占用时间，或所述信道占用时间小于所述第二终端装置确定的最大信道占用时间。
  3. 如权利要求1或2所述的方法，其特征在于，还包括：
    所述第一终端装置接收来自于所述第二终端装置的所述信道占用时间的指示信息。
  4. 如权利要求1-3中任一所述的方法，其特征在于，
    所述第二频域资源是由网络设备指示的，或预配置的，或预定义的。
  5. 如权利要求1-4中任一所述的方法，其特征在于，所述第二频域资源包括两个不连续的资源块，所述两个不连续的资源块之间的频域间隔为Offset个资源块，所述Offset满足：
    (Offset+2)个资源块所对应的带宽大于或等于所述第一信道的带宽和第一系数的乘积，所述第一系数大于0且小于等于1。
  6. 如权利要求1-5中任一所述的方法，其特征在于，所述第二反馈信息为所述第一反馈信息的复制信息，或所述第二反馈信息为预定义的比特流。
  7. 如权利要求1-6中任一所述的方法，其特征在于，
    所述第二频域资源为所述第一信道中的第m个交错资源，所述交错资源包含至少两个在频域上交错的资源块，其中m为整数，所述m大于或等于1，且，小于或等于所述第一信道中包括的交错资源的总数，其中，m的取值是预定义的、网络设备指示的或预配置的。
  8. 如权利要求1-7中任一所述的方法，其特征在于，
    所述第二频域资源的第一个资源块为所述第一信道中的第N1个资源块，所述第二频域资源的最后一个资源块为所述第一信道中的第N2个资源块，其中，N1和N2为正整数，并且，N1和N2的取值是预定义的、网络设备指示的或预配置的。
  9. 如权利要求1-8中任一所述的方法，其特征在于，所述第一频域资源为根据所述承载所述第一数据的时频资源对应的交错资源的索引和/或个数，和所述第一数据对应的标识信息确定的。
  10. 如权利要求1-9中任一所述的方法，其特征在于，所述第一终端装置在所述反馈时间单元中的第一频域资源上发送第一反馈信息，包括：
    所述第一终端装置根据第一码域资源，在所述反馈时间单元中的第一频域资源上发送第一反馈信息，所述第一码域资源为根据所述承载所述第一数据的时频资源对应的交错资源的索引和/或个数，和所述第一数据对应的标识信息确定的。
  11. 如权利要求1-10中任一项所述的方法，其特征在于，所述第一终端装置确定在信道占用时间内的对应所述第一数据的反馈时间单元，包括：
    所述第一终端装置根据所述承载所述第一数据的时频资源，从时间单元集合中确定所述反馈时间单元，所述时间单元集合包括至少一个时间单元，所述至少一个时间单元中的时间单元包含反馈资源。
  12. 如权利要求11所述的方法，其特征在于，所述时间单元集合中的第一个所述时间单元的起始位置与所述信道占用时间的起始位置之间的时域间隔为X 1个时间单元，所述时间单元集合中的每两个相邻的所述时间单元之间的时域间隔为M 1个时间单元，其中，X 1和M 1是预定义的、网络设备指示的、第二终端装置指示的或预配置的，X 1为大于或等于0的正整数，M 1为大于或等于0的正整数。
  13. 如权利要求11所述的方法，其特征在于，还包括：
    所述第一终端装置根据接收的第一指示信息从所述信道占用时间包括的时间单元中，确定所述时间单元集合，所述第一指示信息来自于网络设备或所述第二终端装置。
  14. 如权利要求1-10中任一项所述的方法，其特征在于，所述反馈时间单元为所述信道占用时间中的最后一个时间单元。
  15. 如权利要求1-10中任一项所述的方法，其特征在于，所述第一终端装置确定在信道占用时间内的对应所述第一数据的反馈时间单元，包括：
    在所述信道占用时间小于时间阈值的情况下，所述反馈时间单元为所述信道占用时间中的最后一个时间单元。
  16. 一种通信方法，其特征在于，包括：
    第二终端装置接入第一信道，并向第一终端装置发送第一数据；
    所述第二终端装置确定在信道占用时间内的反馈时间单元，所述反馈时间单元对应所述第一数据；
    所述第二终端装置在所述反馈时间单元中的第一频域资源上接收第一反馈信息；其中，
    所述第一反馈信息为针对所述第一数据的确认应答或否定应答，所述第一频域资源为 根据承载所述第一数据的时频资源确定的。
  17. 如权利要求16所述的方法，其特征在于，还包括：
    所述第二终端装置接收并弃置第二反馈信息，所述第二反馈信息承载于所述反馈时间单元中的第二频域资源，所述第一频域资源和所述第二频域资源属于所述第一信道，且所述第一频域资源与所述第二频域资源不重叠。
  18. 如权利要求17所述的方法，其特征在于，
    所述第二频域资源是由网络设备指示的，或预配置的，或预定义的。
  19. 如权利要求17或18所述的方法，其特征在于，所述第二频域资源包括两个不连续的资源块，所述两个不连续的资源块之间的频域间隔为Offset个资源块，所述Offset满足：
    (Offset+2)个资源块所对应的带宽大于或等于所述第一信道的带宽和第一系数的乘积，所述第一系数大于0且小于等于1。
  20. 如权利要求17-19中任一所述的方法，其特征在于，所述第二反馈信息为所述第一反馈信息的复制信息，或所述第二反馈信息为预定义的比特流。
  21. 如权利要求17-20中任一所述的方法，其特征在于，
    所述第二频域资源为所述第一信道中的第m个交错资源，所述交错资源包含至少两个在频域上交错的资源块，其中m为整数，所述m大于或等于1，且，小于或等于所述第一信道中包括的交错资源的总数，其中，m的取值是预定义的、网络设备指示的或预配置的。
  22. 如权利要求17-21中任一所述的方法，其特征在于，
    所述第二频域资源的第一个资源块为所述第一信道中的第N1个资源块，所述第二频域资源的最后一个资源块为所述第一信道中的第N2个资源块，其中，N1和N2为正整数，并且，N1和N2的取值是预定义的、网络设备指示的或预配置的。
  23. 如权利要求16-22中任一所述的方法，其特征在于，
    所述信道占用时间为所述第二终端装置确定的最大信道占用时间，或所述信道占用时间小于所述第二终端装置确定的最大信道占用时间。
  24. 如权利要求16-23中任一所述的方法，其特征在于，还包括：
    所述第二终端装置向所述第一终端装置发送所述信道占用时间的指示信息。
  25. 如权利要求16-24中任一所述的方法，其特征在于，所述第一频域资源为根据所述承载所述第一数据的时频资源对应的交错资源的索引和/或个数，和所述第一数据对应的标识信息确定的。
  26. 如权利要求16-25中任一所述的方法，其特征在于，所述第二终端装置在所述反馈 时间单元中的第一频域资源上接收第一反馈信息，包括：
    所述第二终端装置根据第一码域资源，在所述反馈时间单元中的第一频域资源上接收第一反馈信息，所述第一码域资源为根据所述承载所述第一数据的时频资源对应的交错资源的索引和/或个数，和所述第一数据对应的标识信息确定的。
  27. 如权利要求16-26中任一项所述的方法，其特征在于，所述第二终端装置确定在信道占用时间内的对应所述第一数据的反馈时间单元，包括：
    所述第二终端装置根据所述承载所述第一数据的时频资源，从时间单元集合中确定所述反馈时间单元，所述时间单元集合包括至少一个时间单元，所述至少一个时间单元中的时间单元包含反馈资源。
  28. 如权利要求27所述的方法，其特征在于，所述时间单元集合中的第一个所述时间单元的起始位置与所述信道占用时间的起始位置之间的时域间隔为X 1个时间单元，所述时间单元集合中的每两个相邻的所述时间单元之间的时域间隔为M 1个时间单元，其中，X 1和M 1是预定义的、网络设备指示的、第二终端装置指示的或预配置的，X 1为大于或等于0的正整数，M 1为大于或等于0的正整数。
  29. 如权利要求28所述的方法，其特征在于，还包括：
    所述第二终端装置向第一终端装置发送第一指示信息，所述第一指示信息用于所述第一终端装置从所述信道占用时间包括的时间单元中，确定所述时间单元集合。
  30. 如权利要求28或29所述的方法，其特征在于，还包括：
    所述第二终端装置根据接收的第二指示信息从所述信道占用时间包括的时间单元中，确定所述时间单元集合，所述第二指示信息来自于网络设备。
  31. 如权利要求16-30中任一项所述的方法，其特征在于，所述反馈时间单元为所述信道占用时间中的最后一个时间单元。
  32. 如权利要求16-31中任一项所述的方法，其特征在于，所述第一终端装置确定在信道占用时间内的对应所述第一数据的反馈时间单元，包括：
    在所述信道占用时间小于时间阈值的情况下，所述反馈时间单元为所述信道占用时间中的最后一个时间单元。
  33. 一种通信装置，其特征在于，包括：
    收发模块，用于接收来自第二终端装置的第一数据；
    处理模块，用于确定在信道占用时间内的反馈时间单元，所述反馈时间单元对应所述第一数据；
    所述收发模块还用于，接入第一信道，在所述反馈时间单元中的第一频域资源上发送第一反馈信息，并在所述反馈时间单元中的第二频域资源上发送第二反馈信息；其中，
    所述第一反馈信息为针对所述第一数据的确认应答或否定应答，所述第一频域资源为根据承载所述第一数据的时频资源确定的，所述第一频域资源和所述第二频域资源属于所 述第一信道，且所述第一频域资源与所述第二频域资源不重叠。
  34. 如权利要求33所述的装置，其特征在于，
    所述信道占用时间为所述第二终端装置确定的最大信道占用时间，或所述信道占用时间小于所述第二终端装置确定的最大信道占用时间。
  35. 如权利要求33或34所述的装置，其特征在于，所述收发模块还用于：
    接收来自于所述第二终端装置的所述信道占用时间的指示信息。
  36. 如权利要求33-35中任一所述的装置，其特征在于，
    所述第二频域资源是由网络设备指示的，或预配置的，或预定义的。
  37. 如权利要求33-36中任一所述的装置，其特征在于，所述第二频域资源包括两个不连续的资源块，所述两个不连续的资源块之间的频域间隔为Offset个资源块，所述Offset满足：
    (Offset+2)个资源块所对应的带宽大于或等于所述第一信道的带宽和第一系数的乘积，所述第一系数大于0且小于等于1。
  38. 如权利要求33-37中任一所述的装置，其特征在于，所述第二反馈信息为所述第一反馈信息的复制信息，或所述第二反馈信息为预定义的比特流。
  39. 如权利要求33-38中任一所述的装置，其特征在于，
    所述第二频域资源为所述第一信道中的第m个交错资源，所述交错资源包含至少两个在频域上交错的资源块，其中m为整数，所述m大于或等于1，且，小于或等于所述第一信道中包括的交错资源的总数，其中，m的取值是预定义的、网络设备指示的或预配置的。
  40. 如权利要求33-39中任一所述的装置，其特征在于，
    所述第二频域资源的第一个资源块为所述第一信道中的第N1个资源块，所述第二频域资源的最后一个资源块为所述第一信道中的第N2个资源块，其中，N1和N2为正整数，并且，N1和N2的取值是预定义的、网络设备指示的或预配置的。
  41. 如权利要求33-40中任一所述的装置，其特征在于，所述第一频域资源为根据所述承载所述第一数据的时频资源对应的交错资源的索引和/或个数，和所述第一数据对应的标识信息确定的。
  42. 如权利要求33-41中任一所述的装置，其特征在于，所述收发模块具体用于：
    所根据第一码域资源，在所述反馈时间单元中的第一频域资源上发送第一反馈信息，所述第一码域资源为根据所述承载所述第一数据的时频资源对应的交错资源的索引和/或个数，和所述第一数据对应的标识信息确定的。
  43. 如权利要求33-42中任一项所述的装置，其特征在于，所述处理模块具体用于：
    根据所述承载所述第一数据的时频资源，从时间单元集合中确定所述反馈时间单元，所述时间单元集合包括至少一个时间单元，所述至少一个时间单元中的时间单元包含反馈资源。
  44. 如权利要求43所述的装置，其特征在于，所述时间单元集合中的第一个所述时间单元的起始位置与所述信道占用时间的起始位置之间的时域间隔为X 1个时间单元，所述时间单元集合中的每两个相邻的所述时间单元之间的时域间隔为M 1个时间单元，其中，X 1和M 1是预定义的、网络设备指示的、第二终端装置指示的或预配置的，X 1为大于或等于0的正整数，M 1为大于或等于0的正整数。
  45. 如权利要求44所述的装置，其特征在于，所述处理模块还用于：
    根据接收的第一指示信息从所述信道占用时间包括的时间单元中，确定所述时间单元集合，所述第一指示信息来自于网络设备或所述第二终端装置。
  46. 如权利要求33-45中任一项所述的装置，其特征在于，所述反馈时间单元为所述信道占用时间中的最后一个时间单元。
  47. 如权利要求33-46中任一项所述的装置，其特征在于，在所述信道占用时间小于时间阈值的情况下，所述反馈时间单元为所述信道占用时间中的最后一个时间单元。
  48. 一种通信装置，其特征在于，包括：
    收发模块，用于接入第一信道，并向第一终端装置发送第一数据；
    处理模块，用于确定在信道占用时间内的反馈时间单元，所述反馈时间单元对应所述第一数据；
    所述收发模块还用于，在所述反馈时间单元中的第一频域资源上接收第一反馈信息；其中，
    所述第一反馈信息为针对所述第一数据的确认应答或否定应答，所述第一频域资源为根据承载所述第一数据的时频资源确定的。
  49. 如权利要求48所述的装置，其特征在于，所述收发模块还用于：
    接收并弃置第二反馈信息，所述第二反馈信息承载于所述反馈时间单元中的第二频域资源，所述第一频域资源和所述第二频域资源属于所述第一信道，且所述第一频域资源与所述第二频域资源不重叠。
  50. 如权利要求49所述的装置，其特征在于，
    所述第二频域资源是由网络设备指示的，或预配置的，或预定义的。
  51. 如权利要求49或50所述的装置，其特征在于，所述第二频域资源包括两个不连续的资源块，所述两个不连续的资源块之间的频域间隔为Offset个资源块，所述Offset满足：
    (Offset+2)个资源块所对应的带宽大于或等于所述第一信道的带宽和第一系数的乘积，所述第一系数大于0且小于等于1。
  52. 如权利要求49-51中任一所述的装置，其特征在于，所述第二反馈信息为所述第一反馈信息的复制信息，或所述第二反馈信息为预定义的比特流。
  53. 如权利要求49-52中任一所述的装置，其特征在于，
    所述第二频域资源为所述第一信道中的第m个交错资源，所述交错资源包含至少两个在频域上交错的资源块，其中m为整数，所述m大于或等于1，且，小于或等于所述第一信道中包括的交错资源的总数，其中，m的取值是预定义的、网络设备指示的或预配置的。
  54. 如权利要求49-53中任一所述的装置，其特征在于，
    所述第二频域资源的第一个资源块为所述第一信道中的第N1个资源块，所述第二频域资源的最后一个资源块为所述第一信道中的第N2个资源块，其中，N1和N2为正整数，并且，N1和N2的取值是预定义的、网络设备指示的或预配置的。
  55. 如权利要求48-54中任一所述的装置，其特征在于，
    所述信道占用时间为第二终端装置确定的最大信道占用时间，或所述信道占用时间小于所述第二终端装置确定的最大信道占用时间。
  56. 如权利要求48-55中任一所述的装置，其特征在于，所述收发模块还用于：
    向所述第一终端装置发送所述信道占用时间的指示信息。
  57. 如权利要求48-56中任一所述的装置，其特征在于，所述第一频域资源为根据所述承载所述第一数据的时频资源对应的交错资源的索引和/或个数，和所述第一数据对应的标识信息确定的。
  58. 如权利要求48-57中任一所述的装置，其特征在于，所述收发具体还用于：
    根据第一码域资源，在所述反馈时间单元中的第一频域资源上接收第一反馈信息，所述第一码域资源为根据所述承载所述第一数据的时频资源对应的交错资源的索引和/或个数，和所述第一数据对应的标识信息确定的。
  59. 如权利要求48-58中任一项所述的装置，其特征在于，所述处理模块具体用于：
    根据所述承载所述第一数据的时频资源，从时间单元集合中确定所述反馈时间单元，所述时间单元集合包括至少一个时间单元，所述至少一个时间单元中的时间单元包含反馈资源。
  60. 如权利要求59所述的装置，其特征在于，所述时间单元集合中的第一个所述时间单元的起始位置与所述信道占用时间的起始位置之间的时域间隔为X 1个时间单元，所述时间单元集合中的每两个相邻的所述时间单元之间的时域间隔为M 1个时间单元，其中，X 1和 M 1是预定义的、网络设备指示的、第二终端装置指示的或预配置的，X 1为大于或等于0的正整数，M 1为大于或等于0的正整数。
  61. 如权利要求60所述的装置，其特征在于，所述收发模块还用于：
    向第一终端装置发送第一指示信息，所述第一指示信息用于所述第一终端装置从所述信道占用时间包括的时间单元中，确定所述时间单元集合。
  62. 如权利要求60或61所述的装置，其特征在于，所述处理模块还用于：
    根据接收的第二指示信息从所述信道占用时间包括的时间单元中，确定所述时间单元集合，所述第二指示信息来自于网络设备。
  63. 如权利要求48-62中任一项所述的装置，其特征在于，所述反馈时间单元为所述信道占用时间中的最后一个时间单元。
  64. 如权利要求48-63中任一项所述的装置，其特征在于，所述处理模块具体用于：
    在所述信道占用时间小于时间阈值的情况下，所述反馈时间单元为所述信道占用时间中的最后一个时间单元。
  65. 一种通信装置，其特征在于，包括通信模块和处理模块；
    所述处理模块控制所述通信模块用于实现如权利要求1-32中任一项所述的方法。
  66. 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中存储有计算机程序或指令，当所述计算机程序或指令被计算设备执行时，以使得所述计算设备执行如权利要求1至32中任一项所述的方法。
  67. 一种包含指令的计算机程序产品，其特征在于，当其在计算机上运行时，使得如权利要求1-32中任一所述的方法被执行。
  68. 一种芯片，其特征在于，所述芯片与存储器耦合，用于读取并执行所述存储器中存储的程序指令，以执行如权利要求1-32中任一所述的方法。
  69. 一种通信系统，其特征在于，包括如权利要求33-47中任一所述的通信装置和如权利要求48-64中任一所述的通信装置。
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