WO2024032285A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2024032285A1
WO2024032285A1 PCT/CN2023/105893 CN2023105893W WO2024032285A1 WO 2024032285 A1 WO2024032285 A1 WO 2024032285A1 CN 2023105893 W CN2023105893 W CN 2023105893W WO 2024032285 A1 WO2024032285 A1 WO 2024032285A1
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WO
WIPO (PCT)
Prior art keywords
capc
terminal device
psfch
communication
information
Prior art date
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PCT/CN2023/105893
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English (en)
Chinese (zh)
Inventor
李翔宇
彭文杰
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华为技术有限公司
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Publication of WO2024032285A1 publication Critical patent/WO2024032285A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • 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]

Definitions

  • the present application relates to the field of communication technology, and in particular, to a communication method and device.
  • data communication between terminal devices can be carried out through network equipment, or communication between terminal equipment can be carried out directly without the help of network equipment.
  • the interface between terminal devices can be called the proximity-based services communication 5 (PC5) interface, which is similar to the Uu interface between terminal devices and network devices.
  • the link between terminal equipment is called a sidelink (SL).
  • the terminal equipment and network equipment When network equipment and terminal equipment transmit on unlicensed spectrum, the terminal equipment and network equipment need to perform a listen before talk (LBT) process before sending data, that is, a channel access process. For example, for uplink hybrid automatic repeat request (HARQ) feedback, the terminal device will perform the LBT process.
  • LBT listen before talk
  • HARQ uplink hybrid automatic repeat request
  • This application provides a communication method and device to clarify how terminal equipment performs LBT in an SL-U scenario and improves the communication quality of SL-U.
  • this application provides a communication method, which can be applied to a first terminal device, a functional module in the first terminal device, a processor or chip in the first terminal device, etc.
  • the method may include: after the first terminal device determines the first channel access priority class (CAPC), sending the first information to the second terminal device, the The first information is used to indicate the second CAPC.
  • the second CAPC is the same as the first CAPC, or the second CAPC is determined based on the first CAPC; the second CAPC is used for the second terminal device for the first physical sidelink
  • the feedback channel (physical sidelink feedback channel, PSFCH) performs LBT.
  • the second terminal device can perform LBT on the PSFCH based on the CAPC indicated by the first terminal device, so that the CAPC transmitted by the PSFCH can be flexibly adapted to actual service communication requirements and improve the communication quality of the SL-U.
  • the first terminal device may determine the first CAPC in the following manner: the first terminal device receives first downlink control information (DCI) from a network device, and the The first DCI is used for scheduling SL resources, and the first DCI indicates the first CAPC. In this way, the first terminal device can determine the CAPC indicated by the first DCI as the first CAPC.
  • DCI downlink control information
  • the first terminal device may determine the first CAPC in the following manner: the first terminal device may determine the first CAPC according to a first preset rule and a first transport block (TB). Describe the first CAPC. In this way, the first terminal device can determine the first CAPC based on the actual situation.
  • the first terminal device determines the first CAPC according to the first preset rule and the first TB.
  • the method may be: when the first TB includes at least one media interface When a media access control control element (MAC CE) is entered, the first terminal device may determine that the first CAPC is the CAPC with the highest priority among the CAPCs corresponding to the at least one MAC CE; when the first CAPC is When a TB does not include the at least one MAC CE and includes at least one sidelink control channel service data unit (SCCH SDU), the first terminal device may determine the first The CAPC is the CAPC with the highest priority among the CAPCs corresponding to the at least one SCCH SDU; when the first TB does not include the at least one MAC CE and the at least one SCCH SDU, and includes at least one sidelink service sidelink traffic channel service data unit (STCH SDU), the first terminal device may The first CAPC is determined to be the CAPC with the lowest priority among the CAPCs corresponding to the at least one STCH SDU. Based on
  • the first terminal device determines the first CAPC according to the first preset rule and the first TB.
  • the method may be: the first terminal device determines the first CAPC. It is the CAPC with the highest priority among the CAPCs corresponding to at least one logical channel (LCH) and/or at least one MAC CE included in the first TB. Based on the above method, the first terminal device can determine the accurate first CAPC in combination with the first preset rule and the first TB, and the implementation complexity of this method is low.
  • LCH logical channel
  • the first terminal device may determine the first CAPC in the following manner: the first terminal device determines that the CAPC corresponding to the first LCH or the first MAC CE is the first CAPC, so The first LCH or the first MAC CE is used to trigger the first terminal device to select or reselect SL resources, and there is a corresponding relationship between the first LCH or the first MAC CE and the CAPC. Based on the above method, the first terminal device can determine the accurate first CAPC in combination with the logical channel or MAC CE that triggers SL resource selection or reselection.
  • the first information may include first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
  • the second CAPC is used for PSFCH transmission, so that the second terminal device performs LBT based on the second CAPC.
  • the format of the first information is a first format, and the first format may be used to indicate that the second CAPC is used for PSFCH transmission. In this way, the format of the first information indicates that the second CAPC is used for PSFCH transmission, which can save indication overhead.
  • this application provides a communication method, which can be applied to a second terminal device, a functional module in the second terminal device, a processor or chip in the second terminal device, etc.
  • the method may include: the second terminal device receives first information from the first terminal device, the first information being used to indicate the second CAPC; subsequently, the second terminal device may LBT is performed on the first PSFCH according to the second CAPC.
  • the second terminal device can perform LBT on the PSFCH based on the CAPC indicated by the first terminal device, so that the CAPC transmitted by the PSFCH can be flexibly adapted to actual service communication requirements and improve the communication quality of the SL-U.
  • the first information may include first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
  • the second CAPC is used for PSFCH transmission, so that the second terminal device performs LBT based on the second CAPC.
  • the format of the first information is a first format, and the first format may be used to indicate that the second CAPC is used for PSFCH transmission. In this way, the format of the first information indicates that the second CAPC is used for PSFCH transmission, which can save indication overhead.
  • the first PSFCH is determined based on the mapping relationship between a physical sidelink control channel (PSSCH) and the PSFCH, or the first PSFCH is indicated by the first terminal device.
  • PSSCH physical sidelink control channel
  • the second terminal equipment can perform LBT on the PSFCH based on the CAPC indicated by the first terminal equipment. This enables the CAPC transmitted by PSFCH to flexibly adapt to actual business communication needs and improve the communication quality of SL-U.
  • the second terminal device performs LBT for the first PSFCH according to the second CAPC.
  • the method may be: the second terminal device determines the third CAPC according to the second CAPC, and then the The second terminal equipment performs LBT on the first PSFCH according to the third CAPC.
  • the second terminal device can flexibly determine the required CAPC to perform LBT on the first PSFCH to flexibly adapt to actual business communication requirements and improve the communication quality of SL-U.
  • the second terminal device determines the third CAPC based on the second CAPC.
  • the method may be: when the second terminal device determines that the second CAPC is less than or equal to the first threshold, The second terminal device determines the third CAPC; or, when the second terminal device determines that the second CAPC is greater than the first threshold, the second terminal device determines the third CAPC.
  • the second terminal device can flexibly determine the required CAPC to perform LBT on the first PSFCH to flexibly adapt to actual business communication requirements and improve the communication quality of SL-U.
  • the second terminal device may determine a fourth CAPC based on the second CAPC, and then the second terminal device performs LBT for the second PSFCH based on the fourth CAPC. In this way, when the second terminal device performs LBT on multiple PSFCHs corresponding to one PSSCH, it can use different CAPCs to improve the reliability of PSFCH transmission, thereby improving the overall SL-U communication quality.
  • the second terminal device determines the fourth CAPC based on the second CAPC.
  • the method may be: the second terminal device may subtract M from the second CAPC to obtain the fourth CAPC.
  • CAPC the M is an integer greater than or equal to 1.
  • the second terminal device receives second information, and the second information may be used to indicate that the fourth CAPC is determined based on the second CAPC, and the fourth CAPC is determined based on the fourth CAPC.
  • the second PSFCH performs LBT. In this way, the second terminal device can determine whether to use different CAPCs for different PSFCHs based on the indication, so that when the same CAPC can be used, the power consumption of determining a new CAPC for each PSFCH transmission is saved.
  • this application provides a communication method, which can be applied to a second terminal device, a functional module in the second terminal device, a processor or chip in the second terminal device, etc.
  • the method may include: the second terminal device receives sidelink control information (SCI) from the first terminal device, and then the second terminal device determines the SCI When CAPC is not indicated, LBT is performed on the first PSFCH according to the predefined CAPC.
  • SCI sidelink control information
  • the second terminal device performs LBT for PSFCH based on the predefined CAPC, so that the CAPC for PSFCH transmission does not need to adapt to actual business communication requirements in some cases, and a higher priority CAPC is used for PSFCH transmission. , thereby improving the communication quality of SL-U.
  • the first PSFCH may be determined by the second terminal equipment.
  • the second terminal device performs LBT on the PSFCH based on the predefined CAPC, which can make the PSFCH transmission
  • CAPC does not need to adapt to actual business communication requirements, but uses higher priority CAPC for PSFCH transmission, thereby improving the communication quality of SL-U.
  • the second terminal equipment determines a fifth CAPC based on the predefined CAPC, and further, the second terminal equipment can perform LBT for the second PSFCH based on the fifth CAPC. In this way, when the second terminal device performs LBT for multiple PSFCHs, it can use different CAPCs to improve the reliability of PSFCH transmission, thereby improving the overall SL-U communication quality.
  • the second terminal device determines the fifth CAPC based on the predefined CAPC.
  • the method may be: the second terminal device may subtract S from the predefined CAPC to obtain the In the fifth CAPC, the S is an integer greater than or equal to 1.
  • the second terminal device receives third information, the third information is used to indicate that the fifth CAPC is determined based on the predefined CAPC, and the fifth CAPC is determined based on the fifth CAPC.
  • the second PSFCH performs LBT. In this way, the second terminal device can determine whether to use different CAPCs for different PSFCHs based on the indication, so that when the same CAPC can be used, the power consumption of determining a new CAPC for each PSFCH transmission is saved.
  • the present application also provides a communication device.
  • the communication device may be a first terminal device, a processor, a chip or a functional module in the first terminal device.
  • the communication device has the ability to implement the above-mentioned first aspect. Or the functions of the first terminal device in each possible design example of the first aspect.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the first terminal device in the above-mentioned first aspect or each possible design example of the first aspect. For details, see The detailed description in the method example will not be repeated here.
  • the structure of the communication device includes a transceiver and a processor, and optionally a memory.
  • the transceiver is used to send and receive information or data, and to communicate with other devices in the communication system.
  • the processor is configured to support the communication device to perform the corresponding function of the first terminal device in the above-mentioned first aspect or each possible design example of the first aspect.
  • the memory is coupled to the processor and holds program instructions and data necessary for the communications device.
  • this application also provides a communication device.
  • the communication device may be a second terminal device, a processor, a chip or a functional module in the second terminal device.
  • the communication device has the ability to implement the above second aspect. or the functionality of the second terminal device in each possible design example of the second aspect.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the second terminal device in the above second aspect or each possible design example of the second aspect. For details, see Detailed description in method example, No further details will be given here.
  • the structure of the communication device includes a transceiver and a processor, and optionally a memory.
  • the transceiver is used to send and receive information or data, and to communicate with other devices in the communication system.
  • the processor is configured to support the communication device to perform the corresponding function of the second terminal device in the above second aspect or each possible design example of the second aspect.
  • the memory is coupled to the processor and holds program instructions and data necessary for the communications device.
  • the present application also provides a communication device.
  • the communication device may be a second terminal device, a processor, a chip or a functional module in the second terminal device.
  • the communication device has the ability to implement the above third aspect. or the functionality of the second terminal device in each possible design example of the third aspect.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the second terminal device in the above third aspect or each possible design example of the third aspect. For details, see The detailed description in the method example will not be repeated here.
  • the structure of the communication device includes a transceiver and a processor, and optionally a memory.
  • the transceiver is used to send and receive information or data, and to communicate with other devices in the communication system.
  • the processor is configured to support the communication device to perform the corresponding function of the second terminal device in the above third aspect or each possible design example of the third aspect.
  • the memory is coupled to the processor and holds program instructions and data necessary for the communications device.
  • embodiments of the present application provide a communication system, which may include the first terminal device in the first aspect and each possible design of the first aspect and the second aspect and each possible design of the second aspect. second terminal equipment, etc.; or may include the first terminal equipment, the second terminal equipment, etc. in the above-mentioned third aspect and each possible design of the third aspect.
  • embodiments of the present application provide a computer-readable storage medium.
  • the computer-readable storage medium stores program instructions. When the program instructions are run on a computer, they cause the computer to execute the first aspect of the embodiments of the application and its operations. Any possible design, or the second aspect and any possible design thereof, or the method described in the third aspect and any possible design thereof.
  • computer-readable storage media can be any available media that can be accessed by a computer.
  • computer-readable media may include non-transitory computer-readable media, random-access memory (random-access memory, RAM), read-only memory (read-only memory, ROM), electrically erasable memory
  • RAM random-access memory
  • ROM read-only memory
  • programmable read-only memory electrically EPROM, EEPROM
  • CD-ROM or other optical disk storage magnetic disk storage media or other magnetic storage devices, or can be used to carry or store the desired program code in the form of instructions or data structures and can Any other media accessed by a computer.
  • embodiments of the present application provide a computer program product that includes computer program code or instructions.
  • the computer program code or instructions are run on a computer, the first aspect or any of the possible designs of the first aspect are enabled. , or the method described in the above-mentioned second aspect or any possible design of the second aspect, or the above-mentioned third aspect or any possible design of the third aspect is executed.
  • the present application also provides a chip, including a processor, the processor being coupled to a memory and configured to read and execute program instructions stored in the memory, so that the chip implements the above first aspect Or in any possible design of the first aspect, or in the above second aspect or any possible design of the second aspect, or in the above third aspect or any possible design of the third aspect, the method described.
  • Figure 1 is a schematic diagram of the architecture of a communication system provided by this application.
  • FIG. 2 is an architectural schematic diagram of another communication system provided by this application.
  • FIG. 3 is an architectural schematic diagram of another communication system provided by this application.
  • Figure 4 is a flow chart of a communication method provided by this application.
  • FIG. 5 is a flow chart of another communication method provided by this application.
  • Figure 6 is a schematic structural diagram of a communication device provided by this application.
  • Figure 7 is a structural diagram of a communication device provided by this application.
  • Embodiments of this application provide a communication method and device to clarify how a terminal device performs LBT in an SL-U scenario and improve the communication quality of SL-U.
  • the method and the device described in this application are based on the same technical concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repeated parts will not be repeated.
  • data communication between terminal devices can be carried out through network equipment, or communication between terminal equipment can be carried out directly without the help of network equipment.
  • Direct communication between terminal equipment and terminal equipment is SL communication.
  • SL communication In SL communication, the interface between terminal equipment and terminal equipment is called proximity-based services communication 5 (PC5) interface, and the link between terminal equipment and terminal equipment is called SL. .
  • PC5 proximity-based services communication 5
  • V2X vehicle-to-everything
  • each car is a terminal device, and data can be transmitted directly between terminal devices through SL without going through the network, which can effectively reduce communication delays.
  • SL communication supports unicast, multicast, and broadcast.
  • mode 1 mode 1
  • mode 2 mode 2
  • the terminal device obtains SL resources from the network device.
  • the network device can schedule SL resources to the terminal device through downlink control information (DCI), or the network device can use radio resource control (RRC) messages.
  • DCI downlink control information
  • RRC radio resource control
  • the terminal device can receive the SL resource pool configuration from the network device, or the terminal device can obtain the SL resource pool configuration from the preconfiguration, and then the terminal device selects the SL resource in the SL resource pool. Among them, the terminal device may select SL resources randomly, or based on the results of sensing or partial sensing.
  • SL communication on unlicensed spectrum is called SL-U.
  • LBT can also be called the channel access process. Typically LBT is performed at channel (eg, 20 megahertz (MHz)) granularity.
  • a communication device Before a communication device sends a signal (for example, a data signal) on a certain channel (for example, a first channel), it may first detect whether the first channel is idle, for example, whether it detects that a nearby communication device is occupying the first channel. To send a signal, this detection process can be called clear channel assessment (CCA) or channel access process.
  • CCA clear channel assessment
  • Type 1 LBT is a channel access process based on a fixed duration (it can also be called the first type of channel access process).
  • the LBT of 2 is the backoff-based channel access process (which can also be called the second type of channel access process).
  • CAPC channel occupancy time
  • the relationship between CAPC and COT can be shown in Table 1 below.
  • the first column in Table 1 represents the CAPC value.
  • the fifth column in Table 1 represents the corresponding priority of different CAPC values.
  • COT size (unit: ms). It is understandable that the meanings of other columns in Table 1 can refer to existing standards and will not be described in detail here.
  • the terminal device may be, for example, the terminal device itself, or a module used to implement the functions of the terminal device, such as a chip or a chip system, and the chip or chip system may be provided in the terminal device.
  • Terminal equipment also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice and/or data connectivity to users. equipment.
  • the terminal device may include a handheld device with a wireless connection function, a vehicle-mounted device, etc.
  • terminal devices can be: mobile phones, tablets, laptops, PDAs, mobile Internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (augmented reality (AR) equipment, XR equipment, MR equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, intelligent Wireless terminals in the power grid (smart grid), wireless terminals in transportation safety (transportation safety), wireless terminals in smart cities (smart city), or wireless terminals in smart homes (smart home), etc.
  • MID mobile Internet devices
  • VR virtual reality
  • AR augmented reality
  • XR equipment XR equipment
  • MR equipment augmented reality
  • wireless terminals in industrial control wireless terminals in self-driving
  • wireless terminals in remote medical surgery intelligent Wireless terminals in the power grid (smart grid), wireless terminals in transportation safety (transportation safety), wireless terminals in smart cities (smart city), or wireless terminals in smart homes (smart home), etc.
  • Terminal equipment can also be device-to-device communication (device-to-device, D2D) terminal equipment, Internet of Vehicles V2X communication terminal equipment, smart vehicles, vehicle-to-machine systems (or Internet of Vehicles systems) (telematics box, TBOX), machine to Machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment.
  • the terminal device may be a vehicle, ship or aircraft, or a terminal-type roadside unit, or a communication module or chip built into the vehicle or roadside unit.
  • the terminal device can be a vehicle-mounted module.
  • the terminal equipment can also be a road side unit (RSU). If the various terminal devices introduced above are located on the vehicle, such as placed or installed in the vehicle, they can be considered as vehicle-mounted terminal equipment.
  • the vehicle-mounted terminal equipment is also called an on-board unit (OBU), for example.
  • OBU on-board unit
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices. It is a general term for applying 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 just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones. Used, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • Terminal devices can also be smart devices such as amusement equipment, smart appliances, or drones.
  • a terminal device is taken as an example for explanation.
  • Network equipment equipment that provides access to terminal equipment.
  • Network devices may include radio access network (RAN) devices, such as base stations.
  • RAN radio access network
  • Network equipment may also refer to equipment that communicates with terminal equipment over the air interface.
  • the network equipment may include an evolved base station (evolved Node B, which may be referred to as eNB or e-NodeB) in the LTE system or long term evolution-advanced (LTE-A).
  • eNB evolved Node B
  • e-NodeB evolved base station
  • LTE-A long term evolution-advanced
  • eNB is a device deployed in a wireless access network that meets the fourth generation (the fourth generation, 4G) standards of mobile communication technology to provide wireless communication functions for terminal equipment.
  • the network device can also be a new radio controller (NR controller), it can be a (gNode B, gNB) in the 5G system, it can be a centralized network element (centralized unit), it can be a new wireless base station, it can be
  • the radio frequency remote module can be a micro base station (also called a small station), a relay, a distributed unit, various forms of macro base stations, or a transmission and reception point. (transmission reception point, TRP), transmission measurement function (TMF), transmission point (transmission point, TP) or any other wireless access equipment, the embodiments of the present application are not limited thereto.
  • Network devices may also include radio network controller (RNC), Node B (Node B, NB), base station controller (BSC), base station Transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU) or remote radio unit (RRU), or Wireless fidelity (Wifi) access point (AP), or baseband pool (BBU pool) and RRU in cloud radio access network (cloud radio access netowrk, CRAN), etc.
  • RNC radio network controller
  • Node B Node B
  • BSC base station Controller
  • BTS base station Transceiver station
  • BTS home base station
  • base station for example, home evolved NodeB, or home Node B, HNB
  • base band unit base band unit
  • RRU remote radio unit
  • Wifi) access point AP
  • BBU pool baseband pool
  • cloud radio access netowrk cloud radio access netowrk, CRAN
  • the base station in the embodiment of the present application may include a centralized unit (CU) and a distributed unit (DU), and multiple DUs may be centrally controlled by one CU.
  • CU and DU can be divided according to the protocol layer functions of the wireless network they possess. For example, the functions of the packet data convergence protocol (PDCP) layer and above are set in CU and the protocol layer below PDCP, such as wireless link. Functions such as the radio link control (RLC) layer and the medium access control (medium access control, MAC) layer are set in the DU. It should be noted that this division of protocol layers is just an example, and division can also be performed on other protocol layers.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC medium access control
  • the radio frequency device can be remote and not placed in the DU, or it can be integrated in the DU, or partially remote and partially integrated in the DU.
  • the control plane (CP) and user plane (UP) of the CU can also be separated and implemented into different entities, respectively control plane CU entities (CU-CP entities). and user plane CU entities (CU-UP entities).
  • CU-CP entities control plane CU entities
  • CU-UP entities user plane CU entities
  • the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the UE can be sent to the CU through the DU.
  • the DU may directly encapsulate the signaling through the protocol layer and transparently transmit it to the terminal device or CU without parsing the signaling.
  • the CU is divided into network equipment on the RAN side.
  • the CU can also be divided into network equipment on the core network (core network, CN) side. This application does not limit this.
  • the network device may also be a central processing unit (central processing element, CPE), router, etc.
  • CPE central processing element
  • the network device can also be a functional module, chip or chip system.
  • the functional module, chip or chip system can be disposed in the network device.
  • At least one (species) refers to one (species) or multiple (species), and multiple (species) refers to two (species) or more than two (species).
  • At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of single or plural items.
  • at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c Can be single or multiple.
  • the communication method provided by the embodiments of this application can be applied to various communication systems.
  • the communication method provided by this application can be applied to long term evolution (long term evolution, LTE) system, fifth generation (5th generation, 5G) communication system (such as new wireless (new radio, NR) system), next-generation wireless LAN system, and future sixth generation (6th generation, 6G) communication system or other systems.
  • FIG 1 shows the architecture of a possible communication system to which the communication method provided by this application is applicable.
  • the communication system may include a network device and at least two terminal devices.
  • the at least two terminal devices may be as shown in Figure 1 first terminal device and second terminal device.
  • the Uu interface is used for communication between the first terminal device and the network device.
  • the first terminal device and the second terminal device use the unlicensed spectrum for SL communication and use the PC5 interface for communication.
  • the first terminal device and the second terminal device can work in mode 1 or mode 2, that is, the first terminal device and the second terminal device can obtain SL resources in mode 1 or mode 2.
  • the communication between the first terminal device and the second terminal device may be unicast communication or multicast communication, which is not limited in this application.
  • the first terminal device is the sender of data
  • the second terminal device is the receiver of data
  • the second terminal device can perform a physical sidelink feedback channel (PSFCH) to the first terminal device. )transmission.
  • PSFCH physical sidelink feedback channel
  • the communication system shown in Figure 1 is only an exemplary illustration and is not intended to limit the communication system of the present application.
  • the communication system may also include other devices, which are not limited in this application.
  • FIG. 2 shows the architecture of another possible communication system to which the communication method provided by this application is applicable.
  • the communication system may include remote terminal equipment (remote UE), relay terminal equipment (relay UE), network equipment, etc.
  • the communication system can be applied to UE-relay -Network communication scenario, that is, the remote terminal device accesses the network through the relay terminal device.
  • the communication between the remote terminal equipment and the relay terminal equipment is SL communication, and the remote terminal equipment and the relay terminal equipment can use unlicensed spectrum for SL communication.
  • the communication system shown in FIG. 2 is not limited to only include the devices shown in FIG. 2 , but may also include other devices not shown in FIG. 2 , which will not be listed one by one in this application.
  • FIG 3 shows the architecture of another possible communication system to which the communication method provided by this application is applicable.
  • the communication system can include at least three terminal devices, such as the source terminal equipment (source UE) shown in Figure 3, the middle Relay terminal equipment (relay UE), target terminal equipment (target UE), etc.
  • the communication system can be applied to a UE-UE-UE relay communication scenario, that is, the source terminal device communicates with the target terminal device through the relay terminal device.
  • the communication between the source terminal device and the relay terminal device is SL communication, and the source terminal device and the relay terminal device can use unlicensed spectrum for SL communication.
  • the communication between the relay terminal equipment and the target terminal equipment is SL communication, and the relay terminal equipment and the target terminal equipment can use unlicensed spectrum for SL communication.
  • the communication system shown in FIG. 3 is not limited to only include the devices shown in FIG. 3 , but may also include other devices not shown in FIG. 3 , which will not be listed one by one in this application.
  • SL-U when SL HARQ feedback is transmitted on the PSFCH, there is currently no clear method for the terminal equipment to perform the LBT process, which may affect the communication quality of SL-U. Based on this, embodiments of this application provide a communication method to clarify how the terminal device performs LBT in the SL-U scenario and improve the communication quality of SL-U.
  • the communication method provided by this application is described in detail by taking terminal equipment and network equipment as examples. It should be understood that the operations performed by the terminal equipment can also be performed by the processor in the terminal equipment, or by the chip. Or a chip system, or a functional module, etc. The operations performed by the network device can also be implemented by a processor in the network device, or a chip or chip system, or a functional module, etc. This application is not limited to this.
  • Step 401 The first terminal device determines the first CAPC.
  • the first terminal device may determine the first CAPC through the following method:
  • Method a1 The first terminal device receives a first DCI from the network device, the first DCI is used to schedule SL resources, and the first DCI indicates the first CAPC.
  • the first terminal device can perform SL transmission based on dynamic grant (DG). That is, the first terminal device works in mode 1, and the network device schedules SL resources to the first terminal device through the first DCI.
  • DG dynamic grant
  • the first DCI when the first DCI indicates the first CAPC, it can be implemented by including the first CAPC in the first DCI, or it can be implemented by including information indicating the first CAPC in the first DCI, or it can also be implemented in other ways. There are no restrictions on application.
  • Method a2 The first terminal device determines the first CAPC according to the first preset rule and the first transport block (TB).
  • the first terminal device may perform SL transmission based on configured grant (CG). That is, the first terminal device works in mode 1, and the network device configures SL configuration authorization for the first terminal device through an RRC message.
  • CG configured grant
  • the first terminal device may perform SL transmission based on mode2.
  • the first TB may be the TB when the first terminal device performs SL transmission.
  • the first TB may be the TB when the first terminal device performs SL transmission to the second terminal device.
  • the first terminal device determines the first CAPC according to the first preset rule and the first TB.
  • the method may be as follows:
  • Method b1 When the first TB includes at least one media access control control element (MAC CE), the first terminal device determines the first CAPC as the highest priority among the CAPCs corresponding to at least one MAC CE.
  • CAPC when the first TB does not include at least one MAC CE and includes at least one sidelink control channel service data unit (SCCH SDU), the first terminal device determines that the first CAPC is at least The CAPC with the highest priority among the CAPCs corresponding to one SCCH SDU; when the first TB does not include at least one MAC CE and at least one SCCH SDU, and includes at least one sidelink traffic channel service data unit (sidelink traffic channel service data unit) , STCH SDU), the first terminal device determines the first CAPC to be the CAPC with the lowest priority among the CAPCs corresponding to at least one STCH SDU or at least one logical channel (logical channel, LCH).
  • SCCH SDU sidelink control channel service data unit
  • the first terminal device can determine that the first CAPC is the lowest priority among the CAPCs corresponding to at least one STCH SDU.
  • CAPC or the first terminal device may also determine the first CAPC as the CAPC with the lowest priority among the CAPCs corresponding to at least one LCH.
  • the value of CAPC with higher priority is smaller, and the value of CAPC with lower priority is larger.
  • the LCH can be SCCH or STCH.
  • One SCCH SDU can correspond to one LCH
  • one STCH SDU can correspond to one LCH.
  • the LCH corresponding to SCCH SDU is different from the LCH corresponding to STCH SDU.
  • Method b2 The first terminal device determines the first CAPC as the CAPC with the highest priority among the CAPCs corresponding to at least one LCH and/or at least one MAC CE included in the first TB.
  • the first CAPC may be the CAPC with the highest priority among the CAPCs corresponding to at least one LCH, or the first CAPC may be the CAPC with the highest priority among the CAPCs corresponding to at least one MAC CE, or the first CAPC may be The CAPC with the highest priority among the CAPCs corresponding to at least one LCH and at least one MAC CE.
  • At least one LCH may correspond to at least one SCCH SDU, or may correspond to at least one STCH SDU, or may correspond to at least one SCCH SDU and at least one STCH SDU.
  • the first TB containing at least one LCH may be understood to mean that the first TB contains at least one LCH data or at least one LCH information.
  • Method a3 The first terminal device determines that the CAPC corresponding to the first LCH or the first MAC CE is the first CAPC.
  • the first LCH or the first MAC CE is used to trigger the first terminal device to select or reselect the SL resource.
  • the first terminal device may perform SL transmission based on mode2.
  • the first terminal device selects or reselects the SL resource. It may select or reselect from the same SL resource pool as the previously selected SL resource, or it may select or reselect from a different SL resource pool.
  • Step 402 The first terminal device sends the first information to the second terminal device.
  • the second terminal device receives the first information from the first terminal device.
  • the first information is used to indicate the second CAPC
  • the second CAPC is used to indicate the second CAPC.
  • the second terminal equipment performs LBT on the first PSFCH.
  • the second CAPC is the same as the first CAPC.
  • the second CAPC is determined based on the first CAPC, and the second CAPC is different from the first CAPC.
  • the second CAPC when the second CAPC is determined based on the first CAPC, the second CAPC may be the value obtained by subtracting N from the first CAPC, where N is an integer greater than or equal to 1.
  • the second CAPC when the value obtained by subtracting N from the first CAPC is less than 1, the second CAPC may be 1.
  • the first information is used to indicate the second CAPC, which can be implemented by including the second CAPC in the first information, or by including information indicating the second CAPC in the first information, or it can also be implemented in other ways, This application does not limit this.
  • the first information may be sidelink control information (SCI).
  • SCI sidelink control information
  • the first information may also indicate that the second CAPC is used for PSFCH transmission. Specifically, it can be indicated in the following two ways:
  • the first information includes first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
  • the first indication information may be a dedicated field in the SCI.
  • the format of the first information is the first format, and the first format is used to indicate that the second CAPC is used for PSFCH transmission.
  • the first information is the SCI
  • the SCI indicating that the second CAPC is used for PSFCH transmission is in a different format than the SCI carrying SL COT sharing.
  • Step 403 The second terminal device performs LBT on the first PSFCH according to the second CAPC.
  • the first PSFCH may be determined based on the mapping relationship between a physical sidelink control channel (PSSCH) and the PSFCH, or the first PSFCH may be indicated by the first terminal device.
  • PSSCH physical sidelink control channel
  • the second terminal equipment may be based on the CAPC indicated by the first terminal equipment. LBT for PSFCH can enable the CAPC transmitted by PSFCH to flexibly adapt to actual business communication needs and improve the communication quality of SL-U.
  • the following method when the second terminal device performs LBT for the first PSFCH according to the second CAPC, the following method may be included:
  • Method d1 The second terminal device directly performs LBT on the first PSFCH according to the second CAPC.
  • the second terminal device does not process the second CAPC and can directly use the second CAPC.
  • Method d2 The second terminal device determines the third CAPC based on the second CAPC, and further, the second terminal device performs LBT on the first PSFCH based on the third CAPC.
  • the second terminal device determines that the second CAPC is less than or equal to the first threshold.
  • the second terminal device determines that the second CAPC is less than or equal to the first threshold.
  • Three CAPC alternatively, when the second terminal device determines that the second CAPC is greater than the first threshold, the second terminal device determines the third CAPC.
  • the third CAPC determined by the second terminal device when the second CAPC is less than or equal to the first threshold is different from the third CAPC determined by the second terminal device when the second CAPC is greater than the first threshold.
  • the first threshold, the third CAPC determined by the second terminal device when the second CAPC is less than or equal to the first threshold, and the third CAPC determined by the second terminal device when the second CAPC is greater than the first threshold may be predetermined. Defined, or can be configured for the network device, or configured for the first terminal device, or can be determined by the second terminal device itself.
  • the same CAPC when the second terminal device performs LBT for multiple PSFCHs, the same CAPC can be used, for example, the above-mentioned second CAPC is used.
  • the first PSFCH may be any PSFCH among multiple PSFCHs corresponding to the same PSSCH transmission, for example, it may be the first PSFCH or other PSFCH, which is not limited in this application.
  • different CAPCs can also be used, so that subsequent PSFCH executions of LBT use higher priority CAPCs to improve the reliability of PSFCH transmission. , thereby improving the overall SL-U communication quality.
  • the second terminal device may determine the fourth CAPC according to the second CAPC, and then the second terminal device may perform LBT on the second PSFCH according to the fourth CAPC.
  • the second PSFCH may be a certain PSFCH after the first PSFCH.
  • the first PSFCH is the first PSFCH among multiple PSFCHs
  • the second PSFCH may be the second PSFCH among the multiple PSFCHs
  • the second PSFCH may be the second PSFCH among the plurality of PSFCHs.
  • the second terminal device subtracts M from the second CAPC to obtain the fourth CAPC, where M is an integer greater than or equal to 1.
  • the corresponding M value is different.
  • the first PSFCH is the first PSFCH
  • the second PSFCH is the second PSFCH
  • the corresponding M value can be A
  • the second PSFCH is the third PSFCH
  • the corresponding M value is 2A
  • A is an integer greater than or equal to 1. It should be understood that the description here only takes the first PSFCH as the first PSFCH as an example, and does not limit which PSFCH among the plurality of PSFCHs the first PSFCH is.
  • the CAPC corresponding to each subsequent PSFCH is the CAPC corresponding to the previous PSFCH minus A.
  • the CAPC corresponding to the first PSFCH among the multiple PSFCHs can be used as the initial CAPC, and the CAPC corresponding to each PSFCH after the first PSFCH can be the CAPC corresponding to the previous PSFCH.
  • Minus A when the first PSFCH is the first PSFCH among multiple PSFCHs, the initial CAPC may be the second CAPC.
  • the above subtraction operation is performed when the CAPC corresponding to the previous PSFCH is greater than 1. That is to say, when the CAPC corresponding to a certain PSFCH is less than or equal to 1, the subsequent PSFCH will no longer perform the above subtraction operation, and the CAPC corresponding to the subsequent PSFCH can all use 1.
  • the above is an example based on the CAPC corresponding to the first PSFCH being the second CAPC.
  • the next PSFCH after the first PSFCH The corresponding CAPC can be obtained by subtracting A from the third CAPC.
  • the initial CAPC may be the third CAPC
  • the CAPC corresponding to the next PSFCH (that is, the second PSFCH) may be the third CAPC minus A.
  • the second terminal device when the second terminal device fails to perform LBT on the first PSFCH, the second terminal device performs LBT on the second PSFCH.
  • the second terminal device when the second terminal device successfully performs LBT on the first PSFCH, the second terminal device may also perform LBT on the second PSFCH, which is not limited in this application.
  • the second terminal device receives second information, and the second information is used to indicate determining the fourth CAPC based on the second CAPC, and performing LBT for the second PSFCH based on the fourth CAPC. That is, the second information indicates that the CAPC corresponding to the second PSFCH is determined based on the CAPC corresponding to the first PSFCH, and the second terminal device performs the above-mentioned subtraction operation after receiving the second information.
  • the second terminal device may receive the second information from the network device, or may also receive the second information from the first terminal device.
  • the second terminal device can perform LBT on the PSFCH based on the CAPC indicated by the first terminal device, which can make the CAPC transmitted by the PSFCH flexibly adapt to actual business communication requirements and improve the performance of SL-U. Communication quality.
  • FIG. 5 Another communication method provided by the embodiment of the present application can be seen as shown in FIG. 5 .
  • the process of this method can include:
  • Step 501 The second terminal device receives the SCI from the first terminal device.
  • Step 502 When the second terminal device determines that the SCI does not indicate CAPC, it performs LBT on the first PSFCH according to the predefined CAPC.
  • the first PSFCH may be determined by the second terminal device, and the manner in which the second terminal device determines the first PSFCH is not limited in this application.
  • the second terminal device performs LBT on the PSFCH based on the predefined CAPC. This allows the CAPC for PSFCH transmission to be used in some cases without adapting to actual business communication requirements, and uses higher priority CAPC for PSFCH transmission, thus improving the communication quality of SL-U.
  • the same CAPC when the second terminal device performs LBT for multiple PSFCHs, the same CAPC may be used, for example, the above-mentioned predefined CAPC may be used.
  • the first PSFCH may be any PSFCH among multiple PSFCHs corresponding to the same PSSCH transmission, for example, it may be the first PSFCH or other PSFCH, which is not limited in this application.
  • different CAPCs can also be used, so that subsequent PSFCH executions of LBT use higher priority CAPCs to improve the reliability of PSFCH transmission. , thereby improving the overall SL-U communication quality.
  • the second terminal device determines the fifth CAPC according to the predefined CAPC, and then the second terminal device performs LBT on the second PSFCH according to the fifth CAPC.
  • the second PSFCH may be a certain PSFCH after the first PSFCH.
  • the first PSFCH is the first PSFCH among multiple PSFCHs
  • the second PSFCH may be the second PSFCH among the multiple PSFCHs
  • the second PSFCH may be the second PSFCH among the plurality of PSFCHs.
  • the second terminal device can subtract S from the predefined CAPC to obtain the fifth CAPC, where S is an integer greater than or equal to 1.
  • the corresponding S value is different.
  • the first PSFCH is the first PSFCH
  • the second PSFCH is the second PSFCH
  • the corresponding S value can be B
  • the second PSFCH is the third PSFCH
  • the corresponding M value is 2B
  • B is an integer greater than or equal to 1. It should be understood that the description here only takes the first PSFCH as the first PSFCH as an example, and does not limit which PSFCH among the plurality of PSFCHs the first PSFCH is.
  • the CAPC corresponding to each subsequent PSFCH is the CAPC corresponding to the previous PSFCH minus B.
  • the CAPC corresponding to the first PSFCH among the multiple PSFCHs can be used as the initial CAPC, and the CAPC corresponding to each PSFCH after the first PSFCH can be the CAPC corresponding to the previous PSFCH.
  • Minus B when the first PSFCH is the first PSFCH among multiple PSFCHs, the initial CAPC may be a predefined CAPC.
  • the above subtraction operation is performed when the CAPC corresponding to the previous PSFCH is greater than 1. That is to say, when the CAPC corresponding to a certain PSFCH is less than or equal to 1, the subsequent PSFCH will no longer perform the above subtraction operation, and the CAPC corresponding to the subsequent PSFCH can all use 1.
  • the second terminal device when the second terminal device fails to perform LBT on the first PSFCH, the second terminal device performs LBT on the second PSFCH.
  • the second terminal device when the second terminal device successfully performs LBT on the first PSFCH, the second terminal device may also perform LBT on the second PSFCH, which is not limited in this application.
  • the second terminal device receives the third information, and the third information is used to instruct to determine the fifth CAPC based on the predefined CAPC, and perform LBT for the second PSFCH according to the fifth CAPC. That is, the third information indicates that the CAPC corresponding to the second PSFCH is determined based on the predefined CAPC, and the second terminal device performs the above-mentioned subtraction S operation after receiving the third information.
  • the second terminal device may receive the third information from the network device, or may also receive the third information from the first terminal device.
  • the second terminal device performs LBT for PSFCH based on the predefined CAPC, which can make the CAPC of PSFCH transmission not need to adapt to the actual business communication requirements in some cases, but use higher The priority CAPC performs PSFCH transmission, thereby improving the communication quality of SL-U.
  • the second terminal device receives the first information indicating the second CAPC from the first terminal device, and subsequently the second terminal device can select a CAPC from the second CAPC and the predefined CAPC to target the first CAPC.
  • a PSFCH performs LBT. For example, when the first PSFCH is determined based on the mapping relationship between PSSCH and PSFCH, or when the first PSFCH is indicated by the first terminal device, the second terminal device selects the second CAPC. For another example, when the first PSFCH may be determined by the second terminal device, the second terminal device may select a predefined CAPC.
  • the second terminal device can also select a CAPC through other methods, which is not limited in this application.
  • the first PSFCH may be any one of the multiple PSFCHs corresponding to the same PSSCH transmission, for example, it may be the first PSFCH or Other PSFCHs are not limited in this application.
  • the second terminal device performs LBT for multiple PSFCHs, the same CAPC, different CAPC can also be used. For specific methods, please refer to the description of the above embodiment, and will not be introduced in detail here.
  • the SL transmission may be for the first terminal device or for other terminal devices.
  • the terminal equipment can determine to use the CAPC corresponding to the TB transmitted by the SL to perform LBT on the first PSFCH.
  • the communication device 600 may include a transceiver unit 601 and a processing unit 602 .
  • the transceiver unit 601 is used for communicating with the communication device 600 , such as receiving information, messages or data, etc., or sending information, messages or data, etc.
  • the processing unit 602 is used for processing the communication device 600 . Actions are controlled and managed.
  • the processing unit 602 can also control the steps performed by the transceiver unit 601.
  • the communication device 600 may be the first terminal device in the above embodiment, a processor of the first terminal device, a chip, a chip system, a functional module, etc.
  • the communication device 600 may specifically be the second terminal device in the above embodiment, a processor of the second terminal device, or a chip, or a chip system, or a functional module, etc.
  • the processing unit 602 can be used to determine the first CAPC; the transceiver unit 601 can Used to send first information to the second terminal device, the first information being used to indicate a second CAPC, the second CAPC is the same as the first CAPC, or the second CAPC is determined based on the first CAPC ;
  • the second CAPC is used for the second terminal equipment to perform listen-before-talk LBT for the first physical sidelink feedback channel PSFCH.
  • the processing unit 602 may be configured to: control the transceiver unit 601 to receive the first downlink control information DCI from the network device, where the first DCI is used for the scheduling side. Link SL resource, the first DCI indicates the first CAPC.
  • the processing unit 602 may be configured to: determine the first CAPC according to the first preset rule and the first transmission block TB.
  • the processing unit 602 may be used to:
  • the first TB includes at least one media access control control element MAC CE
  • the first TB does not include the at least one MAC CE and includes at least one sidelink control channel service data unit SCCH SDU
  • it is determined that the first CAPC is the CAPC corresponding to the at least one SCCH SDU.
  • the first TB does not include the at least one MAC CE and the at least one SCCH SDU and includes at least one sidelink service channel service data unit STCH SDU
  • the processing unit 602 may be configured to: determine that the first CAPC is included in the first TB.
  • the processing unit 602 may be used to: determine that the CAPC corresponding to the first LCH or the first MAC CE is the first CAPC, and the first LCH or the first MAC CE is the first CAPC.
  • a MAC CE is used to trigger the first terminal device to select or reselect SL resources, and there is a corresponding relationship between the first LCH or the first MAC CE and the CAPC.
  • the first information includes first indication information
  • the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
  • the format of the first information is a first format
  • the first format is used to indicate that the second CAPC is used for PSFCH transmission.
  • the transceiver unit 601 can be used to receive the first information from the first terminal device, The first information is used to indicate the second CAPC; the processing unit 602 may be configured to perform listen-before-talk LBT for the first physical sidelink feedback channel PSFCH according to the second CAPC.
  • the first information may include first indication information, and the first indication information is used to instruct the second CAPC to be used for PSFCH transmission.
  • the format of the first information may be a first format, and the first format is used to indicate that the second CAPC is used for PSFCH transmission.
  • the first PSFCH may be determined based on the mapping relationship between the physical sidelink shared channel PSSCH and the PSFCH, or, The first PSFCH may be indicated by the first terminal equipment.
  • the processing unit 602 when performing LBT on the first PSFCH according to the second CAPC, may be configured to: determine a third CAPC according to the second CAPC; CAPC performs LBT on the first PSFCH.
  • the processing unit 602 may be configured to: determine the third CAPC when determining that the second CAPC is less than or equal to a first threshold; or , when it is determined that the second CAPC is greater than the first threshold, the third CAPC is determined.
  • the processing unit 602 may also be configured to: determine a fourth CAPC according to the second CAPC; and perform LBT for the second PSFCH according to the fourth CAPC.
  • the processing unit 602 may be used to: subtract M from the second CAPC to obtain the fourth CAPC, where M is greater than or equal to an integer of 1.
  • the transceiver unit 601 may also be configured to receive second information, the second information being used to indicate that the fourth CAPC is determined based on the second CAPC, and the fourth CAPC is determined based on the fourth CAPC. LBT is performed on the second PSFCH.
  • the transceiver unit 601 can be used to receive a side link from the first terminal device.
  • Control information SCI the processing unit 602 may be configured to perform listen-before-talk LBT based on the predefined CAPC for the first physical sidelink feedback channel PSFCH when it is determined that the SCI does not indicate the channel access priority type CAPC.
  • the first PSFCH may be determined by the second terminal equipment.
  • the processing unit 602 may be further configured to: determine a fifth CAPC according to the predefined CAPC; and perform LBT for the second PSFCH according to the fifth CAPC.
  • the processing unit 602 may be used to: subtract S from the predefined CAPC to obtain the fifth CAPC, where S is greater than Or an integer equal to 1.
  • the transceiver unit 601 may also be configured to receive third information, and the third information may be used to indicate that the fifth CAPC is determined based on the predefined CAPC, and the fifth CAPC is determined based on the predefined CAPC.
  • Five CAPCs perform LBT on the second PSFCH.
  • each functional unit in the embodiment of the present application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the above integrated units can be implemented in the form of hardware or software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .
  • the communication device 700 may include a transceiver 701 and a processor 702 .
  • the communication device 700 may also include a memory 703.
  • the memory 703 may be disposed inside the communication device 700 or may be disposed outside the communication device 700 .
  • the processor 702 can control the transceiver 701 to receive and send messages, information, messages or data, etc.
  • the processor 702 may be a central processing unit (CPU), a network processor (NP) or a combination of CPU and NP.
  • the processor 702 may further include a hardware chip.
  • the above-mentioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL) or any combination thereof.
  • the transceiver 701, the processor 702 and the memory 703 are connected to each other.
  • the transceiver 701, the processor 702 and the memory 703 are connected to each other through a bus 704;
  • the bus 704 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard Structure(Extended Industry Standard Architecture, EISA) bus, etc.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 7, but it does not mean that there is only one bus or one type of bus.
  • the memory 703 is used to store programs, etc.
  • the program may include program code including computer operating instructions.
  • the memory 703 may include RAM, and may also include non-volatile memory (non-volatile memory), such as one or more disk memories.
  • the processor 702 executes the application program stored in the memory 703 to implement the above functions, thereby realizing the functions of the communication device 700 .
  • the communication device 700 may be the first terminal device in the above embodiment; it may also be the second terminal device in the above embodiment.
  • the transceiver 701 can implement the sending and receiving operations performed by the first terminal device in the above embodiment;
  • the processor 702 can implement other operations other than the sending and receiving operations performed by the first terminal device in the above embodiments.
  • the relevant descriptions please refer to the relevant descriptions in the embodiment shown in FIG. 4 , and will not be introduced in detail here.
  • the transceiver 701 can implement the sending and receiving operations performed by the second terminal device in the above embodiment.
  • the processor 702 may implement other operations other than the sending and receiving operations performed by the second terminal device in the above embodiment.
  • the transceiver 701 can implement the sending and receiving operations performed by the second terminal device in the above embodiment.
  • the processor 702 may implement other operations other than the sending and receiving operations performed by the second terminal device in the above embodiment.
  • embodiments of the present application provide a communication system, which may include the first terminal device and the second terminal device involved in the above embodiments.
  • Embodiments of the present application also provide 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 implementation shown in Figure 4 or Figure 5. Example method provided.
  • An 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 method provided by the embodiment shown in Figure 4 or Figure 5. .
  • An embodiment of the present application also provides a chip, including a processor, which is coupled to a memory and configured to call a program in the memory so that the chip implements the method provided by the embodiment shown in Figure 4 or Figure 5. .
  • An embodiment of the present application also provides a chip, the chip is coupled to a memory, and the chip is used to implement the method provided by the embodiment shown in FIG. 4 or FIG. 5 .
  • embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de communication. Le procédé comprend : la détermination par un premier dispositif terminal d'une première classe de priorité d'accès au canal (CAPC) et ensuite, la transmission, à un second dispositif terminal, de premières informations pour indiquer une seconde CAPC, la seconde CAPC étant la même que la première CAPC, ou la seconde CAPC étant déterminée sur la base de la première CAPC ; et la seconde CAPC étant utilisée par le second dispositif terminal pour effectuer une procédure "écouter avant de parler" (LBT) sur un premier canal physique de retour de liaison latérale (PSFCH). Selon le procédé, le second dispositif terminal peut effectuer une procédure LBT sur un PSFCH en fonction d'une CAPC indiquée par le premier dispositif terminal, de sorte que la CAPC transmise par le PSFCH peut être adapté de manière flexible à des exigences de communication de service réelles, et la qualité de communication d'un spectre sans licence de liaison latérale (SL-U) est améliorée.
PCT/CN2023/105893 2022-08-08 2023-07-05 Procédé et appareil de communication WO2024032285A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021087866A1 (fr) * 2019-11-07 2021-05-14 Apple Inc. Mécanismes d'accès à un canal dans une communication sans fil
WO2021212354A1 (fr) * 2020-04-22 2021-10-28 Lenovo (Beijing) Limited Procédé et appareil de partage du temps d'occupation d'un canal
CN114287159A (zh) * 2019-11-21 2022-04-05 Oppo广东移动通信有限公司 无线通信的装置和方法
CN114765506A (zh) * 2021-01-15 2022-07-19 展讯通信（上海）有限公司 辅链路的psfch传输方法及装置、计算机可读存储介质

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021087866A1 (fr) * 2019-11-07 2021-05-14 Apple Inc. Mécanismes d'accès à un canal dans une communication sans fil
CN114287159A (zh) * 2019-11-21 2022-04-05 Oppo广东移动通信有限公司 无线通信的装置和方法
WO2021212354A1 (fr) * 2020-04-22 2021-10-28 Lenovo (Beijing) Limited Procédé et appareil de partage du temps d'occupation d'un canal
CN114765506A (zh) * 2021-01-15 2022-07-19 展讯通信（上海）有限公司 辅链路的psfch传输方法及装置、计算机可读存储介质

Non-Patent Citations (1)

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Title
ERICSSON: "Further discussions on channel access priority", 3GPP DRAFT; R2-1913502, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Chongqing, China; 20191014 - 20191018, 3 October 2019 (2019-10-03), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051791501 *

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