WO2023273743A1 - Procédé et appareil de communication de liaison latérale - Google Patents

Procédé et appareil de communication de liaison latérale Download PDF

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Publication number
WO2023273743A1
WO2023273743A1 PCT/CN2022/095698 CN2022095698W WO2023273743A1 WO 2023273743 A1 WO2023273743 A1 WO 2023273743A1 CN 2022095698 W CN2022095698 W CN 2022095698W WO 2023273743 A1 WO2023273743 A1 WO 2023273743A1
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WIPO (PCT)
Prior art keywords
terminal device
frequency domain
cot
parameter
domain resource
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PCT/CN2022/095698
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English (en)
Chinese (zh)
Inventor
焦春旭
张佳胤
卢磊
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华为技术有限公司
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Publication of WO2023273743A1 publication Critical patent/WO2023273743A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—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
    • 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
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • 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 technical field of communications, and in particular to a lateral communication method and device.
  • the terminal device In SL-U communication, the terminal device needs to monitor whether the channel is idle (idle) before accessing the channel and starting to send data. If the channel has been idle for a certain period of time, it can occupy the channel. If the channel is not idle, it needs to wait for the channel to return to idle. Only then can the channel be occupied. However, if the resource occupation of the unlicensed spectrum is only performed according to the LBT mechanism, the number of terminal devices using the unlicensed spectrum for communication at the same time will be severely limited, and the system throughput will be low.
  • the present application provides a sidelink communication method and device, which are used to improve resource utilization efficiency of SL-U communication.
  • the present application provides a lateral communication method
  • the execution body of the method may be a terminal device, or may be a chip or a circuit.
  • the method includes: receiving indication information from the second terminal device, the indication information indicating: parameters when the second terminal device performs LBT, parameters of the first frequency domain resource used by the second terminal device, and the first frequency domain resource belongs to the first COT
  • the first COT is used for communication between the second terminal device and the third terminal device
  • the second COT is occupied based on the parameters when the second terminal device performs LBT, wherein the first terminal device is used in the second COT
  • the second frequency domain resource belongs to the frequency domain resource corresponding to the first COT, and the second frequency domain resource does not overlap with the first frequency domain resource, and the second COT is used for communication between the first terminal device and the fourth terminal device.
  • the channel When the second terminal device has successfully initiated the first COT based on the LBT mechanism, the channel will be in a non-idle state within the first COT. If the first terminal device performs LBT after the second terminal device initializes the first COT, the channel will be largely The probability detects that the channel is in a non-idle state, making it unable to perform SL transmission.
  • the indication information is used to indicate the parameters when the second terminal device performs LBT, so that the first terminal device and the second terminal device can jointly access the channel at the same time point, thereby avoiding the LBT causes another end device to lose the race.
  • the frequency domain resources used by the first terminal device during the occupation of the channel may not overlap with the frequency domain resources used by the second terminal device during the occupation of the channel, thereby avoiding resource conflicts .
  • Frequency division multiplexing between different terminal devices can be realized through the above method, so that the resource usage efficiency of the SL-U system can be improved, and the communication delay can be reduced.
  • the indication information may also indicate: related parameters of the first COT. Therefore, the method may further include: determining the relevant parameters of the second COT according to the relevant parameters of the first COT.
  • the relevant parameters of the first COT include bandwidth corresponding to the first COT.
  • the relevant parameters of the second COT include bandwidth corresponding to the second COT, where the bandwidth corresponding to the second COT is within the bandwidth corresponding to the first COT.
  • the related parameters of the first COT include the time slot allocation structure of the first COT; the related parameters of the second COT include the time domain resources corresponding to the second COT, wherein the time domain resources corresponding to the second COT
  • the resource is in the first type of time domain resource corresponding to the first COT, and the first type of time domain resource is used for the second terminal device to send sidelink data.
  • the relevant parameters of the first COT include the time slot allocation structure of the first COT; the relevant parameters of the second COT include the time slot allocation structure of the second COT, wherein the time slot allocation structure of the second COT
  • the allocation structure may be the same as the time slot allocation structure of the first COT.
  • the frequency domain resource used by the first terminal device to send data to the fourth terminal device may be the same as the frequency domain resource used by the first terminal device to receive data sent by the fourth terminal device. Domain resources are the same.
  • the parameters when the second terminal device performs LBT include at least one of the following: the start time for the second terminal device to perform LBT, the size of the contention window for the second terminal device to perform LBT, the second terminal device The counter value for performing random backoff, and the priority of the second terminal device for performing LBT.
  • the method before receiving the indication information from the second terminal device, the method further includes: sending a request message to the second terminal device, where the request message is used to request to share the frequency domain resources corresponding to the first COT; A response message of the second terminal device, where the response message is used to indicate that the first terminal device is allowed to share the frequency domain resource corresponding to the first COT.
  • the above design can break the current limitation that only terminal devices belonging to the same communication pair can coordinate with each other. Through the above process, there is no need for access network devices or terminal devices with centralized scheduling functions in the network, but only terminal devices Simple signaling interaction between them, and unlicensed spectrum can be shared after the signaling interaction is completed. Compared with the direct scheduling of resources, the above method can reduce the interactive overhead of scheduling signaling, and further improve the resource utilization efficiency of unlicensed spectrum.
  • the request message carries at least one of the following items: a first parameter and a second parameter.
  • the first parameter is used to indicate the number of interleaved resource blocks included in the second frequency domain resource
  • the second parameter is used to indicate the size of the bandwidth of the first terminal device.
  • the response message carries at least one of the following items: a third parameter and a fourth parameter.
  • the third parameter is used to indicate the position of the second frequency domain resource
  • the fourth parameter is used to indicate the position of the bandwidth of the first terminal device.
  • the third parameter indicates the number of the first interleaved resource block in the remaining interleaved resource blocks in the second frequency domain resource, and the remaining interleaved resource blocks include the frequency domain resources corresponding to the first COT except the first Interleaved resource blocks other than frequency domain resources.
  • the fourth parameter indicates an offset value of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device.
  • the present application provides a lateral communication method, and the execution subject of the method may be a terminal device, or may be a chip or a circuit.
  • the method includes: determining indication information and sending indication information to the first terminal device, where the indication information is used to indicate that the first terminal device shares frequency domain resources corresponding to the first COT with the second terminal device, and the first COT is used for the second terminal device and the second terminal device.
  • the third terminal device communicates, and the indication information indicates: the parameters when the second terminal device performs LBT, the parameters of the first frequency domain resource used by the second terminal device, and the first frequency domain resource belongs to the first COT corresponding frequency domain resources.
  • the channel When the second terminal device has successfully initiated the first COT based on the LBT mechanism, the channel will be in a non-idle state within the first COT. If the first terminal device performs LBT after the second terminal device initializes the first COT, the channel will be largely The probability detects that the channel is in a non-idle state, making it unable to perform SL transmission.
  • the indication information is used to indicate the parameters when the second terminal device performs LBT, so that the first terminal device and the second terminal device can jointly access the channel at the same time point, thereby avoiding the LBT causes another end device to lose the race.
  • the frequency domain resources used by the first terminal device during the occupation of the channel may not overlap with the frequency domain resources used by the second terminal device during the occupation of the channel, thereby avoiding resource conflicts .
  • Frequency division multiplexing between different terminal devices can be realized through the above method, so that the resource usage efficiency of the SL-U system can be improved, and the communication delay can be reduced.
  • the indication information may also indicate: related parameters of the first COT.
  • the first terminal device can determine the relevant parameters of the second COT according to the relevant parameters of the first COT, so that resource conflicts can be better avoided.
  • the relevant parameters of the first COT include bandwidth corresponding to the first COT.
  • the first terminal device can configure the bandwidth corresponding to the second COT, so that conflicts between the first terminal device and other terminal devices can be avoided.
  • the relevant parameters of the first COT include a time slot allocation structure of the first COT.
  • the first terminal device can configure the time domain resource corresponding to the second COT or the time slot configuration structure of the second COT, thereby avoiding the conflict of transmission resources between the first terminal device and the second terminal device.
  • the frequency domain resource used by the second terminal device to send data to the third terminal device may be the same as the frequency domain resource used by the second terminal device to receive data sent by the third terminal device. Domain resources are the same.
  • the parameters when the second terminal device performs LBT include at least one of the following: the start time for the second terminal device to perform LBT, the size of the contention window for the second terminal device to perform LBT, the second terminal device The counter value for performing random backoff, and the priority of the second terminal device for performing LBT.
  • the method before sending the indication information to the first terminal device, the method further includes: receiving a request message from the first terminal device, where the request message is used to request to share the frequency domain resources corresponding to the first COT; The first terminal device shares the frequency domain resource corresponding to the first COT; and sends a response message to the first terminal device, where the response message is used to indicate that the first terminal device is allowed to share the frequency domain resource corresponding to the first COT.
  • the above design can break the current limitation that only terminal devices belonging to the same communication pair can coordinate with each other. Through the above process, there is no need for access network devices or terminal devices with centralized scheduling functions in the network, but only terminal devices Simple signaling interaction between them, and unlicensed spectrum can be shared after the signaling interaction is completed. Compared with the direct scheduling of resources, the above method can reduce the interactive overhead of scheduling signaling, and further improve the resource utilization efficiency of unlicensed spectrum.
  • the request message carries at least one of the following items: a first parameter and a second parameter.
  • the first parameter is used to indicate the number of interleaved resource blocks included in the second frequency domain resource
  • the second parameter is used to indicate the size of the bandwidth of the first terminal device.
  • the response message carries at least one of the following items: a third parameter and a fourth parameter.
  • the third parameter is used to indicate the position of the second frequency domain resource
  • the fourth parameter is used to indicate the position of the bandwidth of the first terminal device.
  • the third parameter indicates the number of the first interleaved resource block in the remaining interleaved resource blocks in the second frequency domain resource, and the remaining interleaved resource blocks include the frequency domain resources corresponding to the first COT except the first Interleaved resource blocks other than frequency domain resources.
  • the fourth parameter indicates an offset value of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device.
  • the present application provides a lateral communication method, and the execution body of the method may be a terminal device, or may be a chip or a circuit.
  • the method includes: sending a request message to the second terminal device, the request message is used to request to share the frequency domain resources corresponding to the first COT, and the first COT is used for the second terminal device to communicate with the third terminal device; A response message, where the response message is used to indicate that the first terminal device is allowed to share the frequency domain resource corresponding to the first COT.
  • the above design can break the current limitation that only terminal devices belonging to the same communication pair can coordinate with each other. Through the above process, there is no need for access network devices or terminal devices with centralized scheduling functions in the network, but only terminal devices Simple signaling interaction between them, and unlicensed spectrum can be shared after the signaling interaction is completed. Compared with the direct scheduling of resources, the above method can reduce the interactive overhead of scheduling signaling, and further improve the resource utilization efficiency of unlicensed spectrum.
  • the request message carries at least one of the following items: a first parameter and a second parameter.
  • the first parameter is used to indicate the number of interleaved resource blocks included in the second frequency domain resource used by the first terminal device in the second COT
  • the second parameter is used to indicate the size of the bandwidth of the first terminal device
  • the second COT Used for communication between the first terminal device and the fourth terminal device.
  • the response message carries at least one of the following items: a third parameter and a fourth parameter.
  • the third parameter is used to indicate the position of the second frequency domain resource
  • the fourth parameter is used to indicate the position of the bandwidth of the first terminal device
  • the position of the second frequency domain resource is within the frequency domain resource corresponding to the first COT
  • the second frequency domain resource does not overlap with the first frequency domain resource used by the second terminal device
  • the first frequency domain resource belongs to the frequency domain resource corresponding to the first COT.
  • the third parameter indicates the number of the first interleaved resource block in the remaining interleaved resource blocks in the second frequency domain resource, and the remaining interleaved resource blocks include the frequency domain resources corresponding to the first COT except the first Interleaved resource blocks other than frequency domain resources.
  • the fourth parameter indicates an offset value of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device.
  • the present application provides a lateral communication method, and the execution subject of the method may be a terminal device, or may be a chip or a circuit.
  • the method includes: receiving a request message from the first terminal device, where the request message is used to request to share frequency domain resources corresponding to the first COT, and the first COT is used for communication between the second terminal device and the third terminal device; determining to allow the first terminal The device shares the frequency domain resource corresponding to the first COT; and sends a response message to the first terminal device, where the response message is used to indicate that the first terminal device is allowed to share the frequency domain resource corresponding to the first COT.
  • the above design can break the current limitation that only terminal devices belonging to the same communication pair can coordinate with each other. Through the above process, there is no need for access network devices or terminal devices with centralized scheduling functions in the network, but only terminal devices Simple signaling interaction between them, and unlicensed spectrum can be shared after the signaling interaction is completed. Compared with the direct scheduling of resources, the above method can reduce the interactive overhead of scheduling signaling, and further improve the resource utilization efficiency of unlicensed spectrum.
  • the request message carries at least one of the following items: a first parameter and a second parameter.
  • the first parameter is used to indicate the number of interleaved resource blocks included in the second frequency domain resource used by the first terminal device in the second COT
  • the second parameter is used to indicate the size of the bandwidth of the first terminal device
  • the second COT Used for communication between the first terminal device and the fourth terminal device.
  • the second terminal device can determine whether to allow the first terminal device to share unlicensed spectrum resources with the second terminal device according to the first parameter and the second parameter.
  • the response message carries at least one of the following items: a third parameter and a fourth parameter.
  • the third parameter is used to indicate the position of the second frequency domain resource
  • the fourth parameter is used to indicate the position of the bandwidth of the first terminal device
  • the position of the second frequency domain resource is within the frequency domain resource corresponding to the first COT
  • the second frequency domain resource does not overlap with the first frequency domain resource used by the second terminal device.
  • the third parameter indicates the number of the first interleaved resource block in the remaining interleaved resource blocks in the second frequency domain resource, and the remaining interleaved resource blocks include the frequency domain resources corresponding to the first COT except the first Interleaved resource blocks other than frequency domain resources.
  • the fourth parameter indicates an offset value of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device.
  • 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, or the third 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 apparatus may be, for example, the first terminal device, or a component or a baseband chip, a chip system, 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 , or the corresponding function of the first terminal device in the third aspect or any possible design thereof.
  • the transceiver unit may be a transmitter and a receiver, or a transceiver obtained by integrating a transmitter and a receiver.
  • the transceiver unit 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, 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 central processing unit (CPU).
  • CPU central processing unit
  • the transceiving unit may be used to perform the receiving and/or sending action performed by the first terminal device in the first aspect or any possible design thereof, or the third 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, or the third aspect or any possible design thereof, such as performing LBT based on the second terminal device When the parameters occupy the second COT and so on.
  • the embodiment of the present application provides a communication device that can implement the method implemented by the second terminal device in the second aspect or any possible design thereof, or the fourth 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 apparatus may be, for example, the second terminal device, or a component or a baseband chip, a chip system, 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 communication module, transceiver module) and a processing unit (or processing module), and these modules may implement the above second aspect or any possible design thereof , or the corresponding function of the second terminal device in the fourth aspect or any possible design thereof.
  • the transceiver unit may be a transmitter and a receiver, or a transceiver obtained by integrating the transmitter and receiver.
  • the transceiver unit 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, 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 central processing unit (CPU).
  • CPU central processing unit
  • the transceiver unit may be used to perform the receiving and/or sending action performed by the second terminal device in the second aspect or any possible design thereof, or in the fourth aspect or any possible design thereof.
  • the processing unit may be used to perform actions other than receiving and sending performed by the second terminal device in the second aspect or any possible design thereof, or in the fourth aspect or any possible design thereof, such as determining indication information, determining to allow the second A terminal device shares frequency domain resources and the like corresponding to the first COT.
  • a communication system in a seventh aspect, includes the communication devices shown in the fifth aspect and the sixth aspect.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used for storing computer instructions, and when the computer instructions are run on a computer, the computer is made to execute any one of the first to fourth aspects above. Aspect or a method shown in any of its possible implementations.
  • a computer program product containing instructions, the computer program product is used to store computer instructions, and when the computer instructions are run on a computer, the computer is made to execute any one of the above first to fourth aspects or the method shown in any of its possible implementations.
  • a circuit is provided, the circuit is coupled to a memory, and the circuit is used to execute the method shown in any one of the above first to fourth aspects or any possible implementation manner thereof.
  • the circuitry may include chip circuitry.
  • FIG. 1 is a schematic diagram of a scene of V2X communication provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of a scenario of SL-U communication provided by an embodiment of the present application
  • FIG. 3 is a schematic flowchart of a communication method provided in an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a time slot configuration structure of a first COT provided in an embodiment of the present application
  • FIG. 5 is a schematic diagram indicating LBT time provided by the embodiment of the present application.
  • FIG. 6 is another schematic diagram indicating LBT time provided by the embodiment of the present application.
  • FIG. 7 is a schematic diagram of a coordination process provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of an FDM provided in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a sharing request provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a response sharing provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • Terminal equipment including equipment that provides voice and/or data connectivity to users, specifically, equipment that provides voice to users, or equipment that provides data connectivity to users, or equipment that provides voice and data connectivity to users sexual equipment. 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 voice or data with the RAN, or exchange voice and data with the RAN.
  • radio access network 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 (vehicle to everything, V2X) terminal equipment , machine-to-machine/machine-type communications (machine-to-machine/machine-type communications, M2M/MTC) terminal equipment, Internet of things (internet of things, IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station) station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user Agent (user agent), or user equipment (user device), etc.
  • IoT Internet of things
  • it may include mobile phones (or “cellular” phones), computers with mobile terminal equipment, portable, pocket, hand-held, computer built-in mobile devices, and the like.
  • PCS personal communication service
  • cordless telephone cordless telephone
  • session initiation protocol session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • constrained devices such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities, etc.
  • it includes barcodes, radio frequency identification (radio frequency identification, RFID), sensors, global positioning system (global positioning system, GPS), laser scanners and other information sensing devices.
  • 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 (for example, placed in the vehicle or installed in the vehicle), can be considered as vehicle-mounted terminal devices, and the vehicle-mounted terminal devices are also called on-board units (OBU) for example. .
  • OBU on-board units
  • 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.
  • the device for realizing the function of the terminal device may be the terminal device, or may be a device capable of supporting the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal device.
  • the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
  • Network equipment for example including access network (access network, AN) equipment, such as base stations (for example, access points), can refer to equipment in the access network that communicates with wireless terminal equipment through one or more cells through the air interface , or for example, a network device in a V2X technology is a road side unit (road side unit, RSU).
  • the base station is operable to convert received over-the-air frames to and from Internet Protocol (IP) packets, acting as a router between the terminal device and the rest of the access network, which may include an IP network.
  • IP Internet Protocol
  • the RSU can be a fixed infrastructure entity supporting V2X applications, and can exchange messages with other entities supporting V2X applications.
  • the network device can also coordinate the attribute management of the air interface.
  • the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (long term evolution, LTE) system or an advanced long term evolution (long term evolution-advanced, LTE-A), Or it may also include the next generation node B (next generation node B, gNB) in the fifth generation mobile communication technology (the 5th generation, 5G) NR system (also referred to as NR system) or it may also include the cloud access network (cloud).
  • NodeB or eNB or e-NodeB, evolutional Node B in a long term evolution (long term evolution, LTE) system or an advanced long term evolution (long term evolution-advanced, LTE-A)
  • LTE long term evolution
  • LTE-advanced long term evolution-advanced
  • LTE-A long term evolution-advanced
  • the next generation node B next generation node B
  • 5G fifth generation mobile communication technology
  • the network device may also include a core network device, and the core network device includes, for example, an access and mobility management function (access and mobility management function, AMF) and the like. Since the embodiments of the present application mainly relate to the access network, unless otherwise specified in the following, the network equipment mentioned refers to the access network equipment.
  • AMF access and mobility management function
  • 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 is the interconnection between the car and the outside world, which is the foundation and key technology of future smart cars, autonomous driving, and intelligent transportation systems.
  • V2X specifically includes vehicle-to-vehicle (V2V), vehicle-to-roadside infrastructure (vehicle-to-infrastructure, V2I), and vehicle-to-pedestrian (V2P) ) direct communication, and several application requirements such as vehicle-to-network (V2N) communication interaction.
  • V2V vehicle-to-vehicle
  • V2I vehicle-to-roadside infrastructure
  • V2P vehicle-to-pedestrian
  • V2V refers to the communication between vehicles
  • V2P refers to the communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers)
  • V2I refers to the communication between vehicles and network equipment, such as RSU, in addition
  • V2N refers to the communication between the vehicle and the base station/network.
  • system and “network” in the embodiments of the present application may be used interchangeably.
  • “At least one” means one or more, and “plurality” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an “or” relationship.
  • “At least one of the following” or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • At least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • first and second are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects , priority or importance, etc.
  • first parameter and the second parameter are only used to distinguish different parameters, and do not mean that the content, priority or importance of the two parameters are different.
  • NR-U the NR Uu interface communication in the unlicensed spectrum
  • PC5 interface which is a communication interface between UEs.
  • the transmission link in the PC5 interface is defined as SL.
  • SL-U Enabling SL communication on unlicensed spectrum in the local space is an important evolution direction, and the corresponding protocol technologies can be collectively referred to as SL-U. Similar to the Uu interface, UEs working through SL-U also need to coexist with nearby Wi-Fi devices based on the LBT mechanism.
  • the essence of the LBT mechanism is a channel access rule. Before accessing the channel and starting to send data, the UE needs to detect whether the channel is idle (idle). If the channel has been idle for a certain period of time, it can occupy the channel. If the channel is not idle, it needs to wait for the channel to become idle again before occupying the channel.
  • the unlicensed spectrum resources are only occupied based on the LBT mechanism, a certain network device or UE may not be able to access the channel because the channel is not in an idle state after its neighbors preemptively access the channel. This will result in a severely limited number of devices using unlicensed spectrum for communication at the same time, resulting in low system throughput. Therefore, how to improve the resource utilization efficiency of the wireless communication system in the unlicensed spectrum on the basis of the LBT mechanism has become a very important technical issue.
  • Frequency division multiplexing is one of the important ways to improve resource utilization efficiency.
  • Devices in the system use orthogonal frequency domain resources to suppress mutual interference, so that more devices in the system can access channels at the same time, thereby improving the resource utilization efficiency of unlicensed spectrum.
  • the SL-U system is a distributed system, and there may be multiple communication pairs composed of multiple sending-end UEs and multiple receiving-end UEs.
  • multiple UEs at the transmitting end try to access the unlicensed spectrum based on their respective LBT mechanisms, one of the UEs at the transmitting end may have already started sending signals, causing other UEs at the transmitting end to fail to access the channel due to LBT failure. Therefore, it is very difficult to implement FDM among multiple transmitting UEs in an SL-U system based on the existing method, which creates a technical requirement for a new method for enabling FDM.
  • embodiments of the present application provide a lateral communication method and device.
  • UEs belonging to different communication pairs can be coordinated, so that the UEs can reasonably allocate the frequency domain resources that they will occupy when performing channel access, thereby avoiding mutual interference and improving the efficiency of unlicensed spectrum. Resource usage efficiency.
  • the UE can align the LBT process according to the indication information of another UE, so as to access the channel in the same time domain resource.
  • the method and the device are based on the same inventive concept, and since the principles of the method and the device to solve problems are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • FIG. 2 shows a schematic diagram of a scenario of the application of the embodiment of the present application.
  • sender UE1, sender UE3, receiver UE2 and receiver UE4 in the scene.
  • the sending end UE1 and the receiving end UE2 are a communication pair, and the sending end UE1 transmits data to the receiving end UE2 through SL-U;
  • the sending end UE3 and the receiving end UE4 are another communication pair, and the sending end UE3 transmits data to the receiving end UE2 through SL-U.
  • the terminal UE4 transmits data.
  • the receiving end UE2 and the receiving end UE4 may also transmit data to the sending end UE1 and the sending end UE3 respectively through the SL-U.
  • the communication pair formed by the sending end UE3 and the receiving end UE4 is the main communication pair in the SL-U system.
  • the sending end UE3 and the receiving end UE4 can be described as the second terminal device and the third terminal device respectively.
  • the priority of the communication service between UE3 and UE4 is higher, or the priority of UE3 itself is higher, etc. Therefore, the communication pair formed by UE3 and UE4 may be the main communication pair in the SL-U system.
  • the communication pair formed by the sending end UE1 and the receiving end UE2 is a communication pair in the SL-U system that wishes to share unlicensed spectrum resources with the above-mentioned main communication pair in the form of FDM.
  • the sending end UE1 and the receiving end UE2 can be described as the first A terminal device and a fourth terminal device.
  • the sending end UE3 takes a mobile phone as an example
  • the receiving end UE4 takes a head mounted display (HMD) as an example
  • the sending end UE1 takes a smart watch as an example
  • the receiving end UE2 takes a tablet computer as an example.
  • HMD head mounted display
  • the actual application scenario can include multiple communication pairs, such as 3 communication pairs, 7 communication pairs, etc., and one terminal device can form different communication pairs with multiple terminal devices, and each send The terminal UE and each receiving terminal UE may be any form of terminal equipment.
  • the sending end and the receiving end can be replaced with each other, that is, a UE can be both the sending end and the receiving end.
  • UE3 takes the communication pair formed by UE3 and UE4 as an example, when UE3 sends data, signaling, etc. to UE4 , UE3 acts as a sending end, UE4 acts as a receiving end, when UE4 sends data, signaling, etc. to UE3, UE4 acts as a sending end, and UE3 acts as a receiving end.
  • FIG. 1 only takes UE3 as a sending end, UE4 as a receiving end, UE1 as a sending end, and UE2 as a receiving end as an example, and the transmission direction is not limited.
  • FIG. 3 it is a schematic flowchart of a lateral communication method provided by the present application.
  • the method includes:
  • the indication information is used to instruct UE3 and UE1 to share frequency domain resources corresponding to the first COT, and the first COT is used for communication between UE3 and UE4.
  • the indication information may indicate parameters used for UE3 to initiate/initiate the first COT.
  • the indication information may indicate: parameters when UE3 performs LBT, so that UE1 can perform LBT according to these parameters, so that UE1 and UE3 can Access the channel jointly at the same time point/period.
  • the indication information may also indicate the frequency domain resource actually used by UE3 in the first COT.
  • the indication information may indicate: the parameters of the first frequency domain resource used by UE3, and the first frequency domain resource belongs to the frequency domain resource corresponding to the first COT. domain resources, so that UE1 can determine the resources not used by UE3 in the frequency domain resources corresponding to the first COT according to the indication information.
  • the indication information is used to instruct UE3 and UE1 to share the frequency domain resource corresponding to the first COT, which means that UE3 and UE1 can have the opportunity to share the first COT that UE3 will initiate/initiate by sending and receiving the indication information.
  • the corresponding frequency domain resources enable UE3 and UE1 to share unlicensed spectrum in FDM mode.
  • step S301 may be an optional step.
  • the process of initializing/initiating COT can refer to the process in which UE accesses an unlicensed spectrum channel according to the LBT mechanism and occupies the channel for a period of time according to specific parameters.
  • COT can be understood as a period of time-frequency resources occupied by terminal equipment through the LBT mechanism
  • the frequency domain resource corresponding to the COT is the unlicensed spectrum channel
  • the time domain resource corresponding to the COT is the time when the terminal equipment occupies the unlicensed spectrum channel through the LBT mechanism.
  • the specific parameters may include parameters related to the COT, such as the duration of the COT, the time slot allocation structure of the COT, and the like.
  • the time slot configuration structure can be used to characterize the specific configuration of the time slots used for terminal equipment transmission and the time slots used for terminal equipment reception in the COT.
  • the first COT includes 10 time slots numbered ⁇ 0, 1, 2, . . . , 9 ⁇ .
  • the time slots numbered ⁇ 0, 1, 2, 3 ⁇ and the time slots numbered ⁇ 8, 9 ⁇ are used for UE3 transmission, which are represented by "T” in the figure; the numbers are ⁇ 4, 5, 6,7 ⁇ time slots are used for reception by UE3, which is represented by "R” in the figure.
  • the time slot used for UE3's transmission will be used for UE4's reception; correspondingly, the time slot used for UE3's reception will be used for UE4's transmission.
  • the frequency domain resource corresponding to the first COT is all or part of the resource block (resource block, RB) of the bandwidth of UE3.
  • the bandwidth of UE3 refers to the channel width of the unlicensed spectrum occupied by UE3, such as 20MHz, 40MHz, 80MHz and so on.
  • the first frequency domain resource used by UE3 may be part of the RBs in the frequency domain resource corresponding to the first COT. Since the frequency domain resource corresponding to the first COT is all or part of the RBs in the bandwidth of UE3, it can be understood that the first frequency domain resource used by UE3 A frequency domain resource is a part of RBs within the bandwidth of UE3.
  • the frequency domain resources corresponding to the second COT are all or part of RBs of the bandwidth of UE1.
  • the bandwidth of UE1 refers to the channel width of the unlicensed spectrum occupied by UE1, such as 20MHz, 40MHz, 80MHz and so on.
  • the second frequency domain resource used by UE1 may be part of the RBs in the frequency domain resource corresponding to the second COT. Since the frequency domain resource corresponding to the second COT is all or part of the RBs in the bandwidth of UE1, it can be understood that the first frequency domain resource used by UE1
  • the second frequency domain resources are part of RBs within the bandwidth of UE1.
  • Bandwidth may also be called nominal channel bandwidth (nominal channel bandwidth, NCB).
  • UE3 sends indication information to UE1.
  • UE1 receives the indication information sent by UE3.
  • the indication information may be carried by sidelink control information (sidelink control information, SCI), and/or radio resource control (radio resource control, RRC) signaling, of course, the indication
  • SCI sidelink control information
  • RRC radio resource control
  • the indication may also be carried by other signaling, which is not specifically limited here.
  • SL data transmission is performed between UE3 and UE4, and SL data transmission is not performed between UE3 and UE1.
  • the indication information sent by UE3 can be received by UE1, and then UE1 can perform according to the indication information. LBT channel access and other operations.
  • UE1 occupies the second COT based on the parameters when UE3 performs LBT.
  • the second frequency domain resource used by UE1 in the second COT belongs to the frequency domain resource corresponding to the first COT, and the second frequency domain resource does not overlap with the first frequency domain resource, and the second COT is used for communication between UE1 and UE2 , so that UE3 and UE1 can share the frequency domain resources corresponding to the first COT in the way of FDM. That is, the second frequency domain resources belong to the resources of the first COT occupied by UE3 that are not actually used by UE3, so UE1 and UE3 can share the resources corresponding to the first COT, so that UE1 can use the resources corresponding to UE3, and then can Effectively improve resource utilization.
  • UE1 can determine the parameters used to initiate/initiate the second COT according to the indication information sent by UE3. Specifically, UE1 can perform LBT according to the parameters when UE3 performs LBT to access the unlicensed spectrum channel and occupy the channel A period of time (that is, the second COT), wherein, the frequency domain resources used by UE1 during the occupation of the second COT (that is, the second frequency domain resources) are the same as the frequency domain resources used by UE3 during the occupation of the first COT (that is, the first frequency domain resources) do not overlap.
  • the channel When UE3 has successfully initiated/initiated the first COT based on the LBT mechanism, the channel will be in a non-idle state within the first COT. If UE1 performs LBT after UE3 initiates/initiates the first COT, it will detect the channel with a high probability It is in a non-idle state, making it unable to perform SL transmission.
  • the indication information is used to indicate the parameters when UE3 performs LBT, so that UE1 and UE3 can achieve common access to the channel at the same time point/time period, thereby avoiding that one terminal device causes another terminal device to perform LBT in advance The competition failed.
  • the frequency domain resources used by UE1 during the occupation of the channel may not overlap with the frequency domain resources used by UE3 during the occupation of the channel, thereby avoiding resource conflicts.
  • the FDM between different terminal devices can be realized through the above method, so that the resource usage efficiency of the SL-U system can be improved, and the communication delay can be reduced.
  • the parameters when UE3 performs LBT may include at least one of the following: start time for UE3 to perform LBT, size of contention window for UE3 to perform LBT, counter value for UE3 to perform random backoff, and priority for UE3 to perform LBT.
  • UE1 can determine the start time of UE1 to perform LBT according to the start time of UE3 to perform LBT, specifically, UE1 configures the start time of the second COT It is the same as the starting time point of the first COT, so UE1 and UE3 can access the unlicensed spectrum channel at the same time point.
  • the indication information may indicate a time parameter t offset , where t offset is the time interval between the end time point T 0 of the previous COT of UE3 and T LBT , as shown in FIG. 5 . Therefore, UE1 can determine the start time T LBT of UE3 to perform LBT as T 0 +t offset according to the t offset indicated by the indication information, and thus determine the start time of UE3 to perform LBT as T 0 +t offset .
  • the above method can be applied to scenarios where UE3 initiates/initiates the first COT at a relatively dynamic time point.
  • UE3 can change the value of t offset , and the above method can accurately indicate the start time of UE3 to perform LBT.
  • the indication information may be carried by the SCI.
  • the indication information may indicate a time parameter t period , where t period is the time interval between the start time point T 1 of the previous COT of UE3 and T LBT , as shown in FIG. 6 . Therefore, UE1 can determine the start time T LBT of UE3 to perform LBT as T 1 +t period according to the t period indicated by the indication information, and thus determine the start time of UE3 to perform LBT as T 1 +t period .
  • the above method can be used in scenarios where the time point when UE3 initiates/initiates the first COT has a certain quasi-static characteristic (such as periodicity).
  • UE3 can quasi-statically indicate the time parameter t period once, so that in subsequent multiple When initializing/initiating the first COT, the time interval between the start time point of LBT and the previous COT of UE3 is t period .
  • UE3 can reduce the signaling overhead caused by the indication information.
  • the indication information may be carried by RRC signaling.
  • the method for UE1 to determine the end time point T 0 of the previous COT of UE3 may include but not limited to: through its own signal detection capability or according to other sources from the third T 0 (or T 1 ) is determined based on the indication information of the terminal device.
  • UE1 may determine the size of the contention window for UE1 to perform LBT according to the size of the contention window for UE3 to perform LBT.
  • UE1 may determine the counter value for UE1 to perform random backoff according to the counter value for UE3 to perform random backoff.
  • UE1 may determine the priority of UE1 to perform LBT according to the priority of UE3 to perform LBT.
  • UE1 can align the random backoff process in LBT performed by itself for the second COT with the random backoff process performed by UE3 in LBT for the first COT, so that UE1 and UE3 complete LBT at the same time point and access channel.
  • the indication information may also indicate other information, for example, related parameters of the first COT. Therefore, UE1 can determine the relevant parameters of the second COT according to the relevant parameters of the first COT.
  • the relevant parameters of the first COT include at least one of the following: a bandwidth corresponding to the first COT, and a time slot configuration structure of the first COT.
  • UE1 may determine the bandwidth corresponding to the second COT according to the bandwidth corresponding to the first COT, wherein the bandwidth corresponding to the second COT does not exceed the bandwidth corresponding to the first COT, or That is, the bandwidth corresponding to the second COT is within the bandwidth corresponding to the first COT, or the bandwidth corresponding to the second COT is the same as the bandwidth corresponding to the first COT.
  • UE1 may determine the corresponding time domain configuration of the second COT according to the time slot allocation structure of the first COT.
  • UE1 may determine the time domain resource of the second COT according to the time slot configuration structure of the first COT, where the time domain resource of the second COT is configured in the first COT as the time domain resource for UE3 to send.
  • UE1 can transmit on the transmission resource in the first COT, and the transmission resource is the time domain resource configured for UE3 to transmit in the first COT, so that the technical effect of resource multiplexing can be achieved.
  • the frequency domain resources used by UE2 to send data to UE1 may be the same as the frequency domain resources used by UE1 to send data to UE2.
  • the frequency domain used by UE2 in the second COT can be guaranteed
  • the resources are orthogonal (ie, non-overlapping) to the frequency domain resources used by UE3 within the first COT.
  • UE1 may determine the time slot allocation structure of the second COT according to the time slot allocation structure of the first COT, where the time slot allocation structure of the second COT is the same as that of the first COT.
  • the frequency domain resource used by UE4 to send data to UE3 is the same as the frequency domain resource used by UE3 to send data to UE4; and, in the second COT, the frequency domain resource used by UE2 to send data to UE1
  • the frequency domain resource used is the same as the frequency domain resource used by UE1 to send data to UE2.
  • UE1 and UE3 may negotiate and determine to allow UE1 and UE3 to share the frequency domain resource corresponding to the first COT. It should be noted that the process of UE1 and UE3 negotiating to allow UE1 and UE3 to share the frequency domain resource corresponding to the first COT may also be implemented independently of the above process of UE1 and UE3 sharing the frequency domain resource corresponding to the first COT.
  • the negotiation process between UE3 and UE1 may be as follows:
  • Step 1 UE1 sends a request message to UE3, where the request message is used to request to share the frequency domain resource corresponding to the first COT.
  • the request message may carry at least one of the following items: a first parameter and a second parameter.
  • the first parameter is used to indicate the size of the frequency domain resource (ie, the second frequency domain resource) used by UE1, for example, the first parameter may indicate the number of interlaced resource blocks (interlaced RB) used by UE1.
  • the second parameter is used to indicate the size of the bandwidth of UE1.
  • the size of the bandwidth used by UE1 may be 20MHz, or 40MHz, or 60MHz, or 80MHz.
  • UE1 sends the second parameter to UE3, which may be used to request to use 20MHz, or 40MHz, or 60MHz, or 80MHz unlicensed spectrum bandwidth for sharing with UE3.
  • the foregoing first parameter and/or second parameter may be an RRC signaling parameter.
  • the request message when UE1 sends a request message to UE3, the request message also carries information about the unlicensed spectrum resources that UE1 requests to occupy, which helps UE3 determine whether it is acceptable to share the unlicensed spectrum with UE1, and can make the communication between UE1 and UE3 More effective coordination is performed to avoid system reliability degradation caused by using non-orthogonal (that is, overlapping, (overlapping)) frequency domain resources.
  • the size of the frequency domain resource used by UE1 is N interleaved resource blocks, where N is a positive integer.
  • the size of the frequency domain resources used by UE3 to send SL data to UE4 is M interleaved resource blocks, where M is a positive integer. If M+N is less than or equal to the total number of interleaved resource blocks within the bandwidth of the unlicensed spectrum, UE1 and UE3 can potentially share the unlicensed spectrum by using orthogonal (ie, non-overlapping) frequency domain resources.
  • the total number of interleaved resource blocks in the bandwidth of the unlicensed spectrum is different.
  • the total number of interleaved resource blocks in the bandwidth of the unlicensed spectrum may be 5.
  • the total number of interleaved resource blocks within the bandwidth of the unlicensed spectrum may be 10.
  • the value range of N is ⁇ 1, 2, 3, 4 ⁇ .
  • the value range of N is ⁇ 1, 2, 3, 4, 5, 6, 7, 8, 9 ⁇ .
  • Step 2 UE3 sends a response message to UE1 when it is determined that UE1 is allowed to share the frequency domain resource corresponding to the first COT, and the response message is used to indicate that UE1 is allowed to share the frequency domain resource corresponding to the first COT.
  • UE3 when UE3 determines that UE1 is not allowed to share the frequency domain resources corresponding to the first COT, it may also send a response message to UE1, where the response message is used to indicate that UE1 is not allowed to share the frequency domain resources corresponding to the first COT.
  • UE3 sends an acknowledgment message (acknowledgment, ACK) to UE1 when determining that UE1 is allowed to share the frequency domain resource corresponding to the first COT, and may also send a negative acknowledgment to UE1 when determining that UE1 is not allowed to share the frequency domain resource corresponding to the first COT (negative acknowledgment, NACK).
  • ACK acknowledgment message
  • UE3 determines whether it is acceptable to share the unlicensed spectrum with UE1 and then sends a response message to UE1, which helps UE1 determine whether it can share the unlicensed spectrum with UE3 in FDM, thereby avoiding the problem caused by the use of non-orthogonal frequency spectrum. System reliability degradation caused by domain resources.
  • the response message when it is an ACK, it may carry at least one of the following items: a third parameter and a fourth parameter.
  • the third parameter is used to indicate the position of the second frequency domain resource
  • the fourth parameter is used to indicate the position of the bandwidth of UE3.
  • the foregoing third parameter and/or fourth parameter may be an RRC signaling parameter.
  • the third parameter may indicate the number of the first interleaved resource block in the remaining interleaved resource blocks in the second frequency domain resource, and the remaining interleaved resource blocks include the frequency domain resources corresponding to the first COT except the first frequency domain resource Interleaved resource blocks.
  • the fourth parameter may indicate an offset value of the bandwidth of UE1 relative to the bandwidth of UE3.
  • UE3 when UE3 accepts to share the unlicensed spectrum with UE1, UE3 can indicate the position of the unlicensed spectrum bandwidth that UE1 can use by sending the fourth parameter to UE1, and/or UE3 can send the third parameter to UE1 parameter to indicate the location of frequency domain resources that UE1 can use.
  • UE3 can limit the unlicensed spectrum shared and used by UE1, which is conducive to improving the coordination effect between terminal devices and is also conducive to the existence of multiple first terminals in the network.
  • the number of frequency domain resources used by UE1 in the remaining interleaved resource blocks in the first COT is n, where n is an integer greater than or equal to 0.
  • UE3 may send a third parameter to UE1 to indicate that it can The locations of the N interleaved resource blocks used.
  • Step 3 UE1 determines that the frequency domain resources corresponding to the first COT can be shared with UE3 in FDM.
  • UE1 receives first indication information from UE3, where the first indication information is used to indicate the size and location of frequency domain resources to be used by UE3 in the first COT.
  • the response message received by UE1 from UE3 includes ACK
  • UE1 determines the location of the frequency domain resource used by itself in the first COT according to the first indication information.
  • the above-mentioned first indication information may be indication information in the SCI.
  • the first information may be indication information involved in the method shown in FIG. 3 .
  • UE1 may determine the position of the frequency domain resource (that is, the second frequency domain resource) used by itself in the first COT according to the first indication information and the third parameter. Among them, UE1 can determine the size and position of the frequency domain resources occupied by UE3 in the first COT (that is, the first frequency domain resources) according to the first indication information, thereby obtaining the remaining available frequency domain resources in the bandwidth of the unlicensed spectrum. size and position. Further, UE1 may determine the position of the frequency domain resource to be used by itself in the remaining available frequency domain resources according to the third parameter.
  • UE1 may determine not to share the frequency domain resource corresponding to the first COT with UE3 in an FDM manner.
  • UE1 can coordinate with UE3 before UE3 initiates/initiates the first COT, and requests to share some or all frequency domain resources on time domain resources in the first COT with UE3 in FDM mode.
  • the foregoing negotiation process may also be called a request process, or may also be described as an association (associate) process.
  • UE1 can serve as a secondary (secondary) terminal device
  • UE3 can serve as a primary (primary) terminal device.
  • the above coordination process is suitable for resource coordination of sending terminal devices belonging to different communication pairs, breaking the current limitation that only terminal devices belonging to the same communication pair can coordinate with each other.
  • An access network device or terminal device with a centralized scheduling function only needs simple signaling interaction between terminal devices. After the signaling interaction is completed, the unlicensed spectrum can be continuously shared in subsequent COTs.
  • the above method can reduce the interactive overhead of scheduling signaling, and further improve the resource utilization efficiency of unlicensed spectrum.
  • the process may include steps S1-S3.
  • UE3 sends response messages to the above three terminal devices.
  • the terminal device numbered 1 and the terminal device numbered 2 determine that the frequency domain resource corresponding to the first COT can be shared with UE3 in an FDM manner.
  • the indication information is used to indicate the parameters when the second terminal device performs LBT, so that the first terminal device and the second terminal device can jointly access the channel at the same time point, thereby avoiding the LBT causes another end device to lose the race.
  • the frequency domain information indicated by the indication information the frequency domain resources used by the first terminal device during the occupation of the channel may not overlap with the frequency domain resources used by the second terminal device during the occupation of the channel, thereby avoiding resource conflicts . Frequency division multiplexing between different terminal devices can be realized through the above method, so that the resource usage efficiency of the SL-U system can be improved, and the communication delay can be reduced.
  • the above coordination process there is no need for access network devices or terminal devices with centralized scheduling functions in the network, but only simple signaling interaction between terminal devices is required. After the signaling interaction is completed, subsequent Unlicensed spectrum is shared within the COT. Compared with the direct scheduling of resources, the above method can reduce the interactive overhead of scheduling signaling, and further improve the resource utilization efficiency of unlicensed spectrum.
  • this embodiment of the present application provides a communication device.
  • the structure of the communication device may be as shown in FIG. 11 , including a communication module 1101 and a processing module 1102 .
  • the processing module 1102 is used for processing algorithms, software, programs, storage, etc. involved in the communication process.
  • the communication module 1101 is used for sending and receiving signals.
  • the communication module 1101 may include a sending module and a receiving module, the sending module is used for sending wireless signals, and the receiving module is used for receiving wireless signals.
  • the communication device can be specifically used to implement the method performed by the first terminal device in the embodiments described in FIGS. A chip or chipset in a terminal device, or a part of a chip used to perform related method functions.
  • the communication module 1101 receives instruction information from the second terminal device, and the instruction information indicates: parameters when the second terminal device performs listen-before-talk LBT, parameters of the first frequency domain resource used by the second terminal device, the first The frequency domain resource belongs to the frequency domain resource corresponding to the first COT, and the first COT is used for communication between the second terminal device and the third terminal device; the processing module 1102 occupies the second COT based on the parameters when the second terminal device performs LBT, wherein , the second frequency domain resource used by the first terminal device in the second COT belongs to the frequency domain resource corresponding to the first COT, and the second frequency domain resource does not overlap with the first frequency domain resource, and the second COT is used for the first terminal The device communicates with the fourth terminal device.
  • the indication information also indicates: the relevant parameters of the first COT; the processing module 1102 is further configured to: determine the relevant parameters of the second COT according to the relevant parameters of the first COT.
  • the relevant parameters of the first COT include at least one of the following: a bandwidth corresponding to the first COT, and a time slot configuration structure of the first COT.
  • the relevant parameters of the second COT include at least one of the following: a bandwidth corresponding to the second COT, and a time domain resource corresponding to the second COT.
  • the bandwidth corresponding to the second COT is within the bandwidth corresponding to the first COT
  • the time domain resource corresponding to the second COT is within the first type of time domain resource corresponding to the first COT
  • the first type of time domain resource is used for the second terminal
  • the device sends sideline data.
  • the parameters when the second terminal device performs LBT include at least one of the following: the start time for the second terminal device to perform LBT, the size of the contention window for the second terminal device to perform LBT, and the counter for the second terminal device to perform random backoff Value, the priority of the second terminal device to perform LBT.
  • the communication module 1101 before receiving the indication information from the second terminal device, is further configured to: send a request message to the second terminal device, where the request message is used to request to share the frequency domain resources corresponding to the first COT; A response message of the second terminal device, where the response message is used to indicate that the first terminal device is allowed to share the frequency domain resource corresponding to the first COT.
  • the request message carries at least one of the following items: a first parameter and a second parameter.
  • the first parameter is used to indicate the number of interleaved resource blocks included in the second frequency domain resource
  • the second parameter is used to indicate the size of the bandwidth of the first terminal device.
  • the response message carries at least one of the following items: a third parameter and a fourth parameter.
  • the third parameter is used to indicate the position of the second frequency domain resource
  • the fourth parameter is used to indicate the position of the bandwidth of the first terminal device.
  • the third parameter indicates the number of the first staggered resource block in the remaining staggered resource blocks in the second frequency domain resource, and the remaining staggered resource blocks include the frequency domain resources corresponding to the first COT except the first frequency domain resource. Interleaved resource blocks.
  • the fourth parameter indicates an offset value of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device.
  • the communication device can be specifically used to implement the method performed by the second terminal device in the embodiments described in FIGS. 3-10 .
  • the device can be the second terminal device itself, or the 2.
  • the processing module 1102 determines indication information, where the indication information is used to instruct the first terminal device to share the frequency domain resource corresponding to the first COT with the second terminal device, and the first COT is used for the second terminal device
  • the device communicates with a third terminal device, and the indication information indicates: parameters when the second terminal device performs listen-before-talk LBT, parameters of the first frequency domain resources used by the second terminal device, and the The first frequency domain resource belongs to the frequency domain resource corresponding to the first COT; the communication module 1101 sends the indication information to the first terminal device.
  • the indication information further indicates: related parameters of the first COT.
  • the relevant parameters of the first COT include at least one of the following: a bandwidth corresponding to the first COT, and a time slot configuration structure of the first COT.
  • the parameters when the second terminal device performs LBT include at least one of the following: the start time for the second terminal device to perform LBT, the size of the contention window for the second terminal device to perform LBT, the The counter value of the random backoff performed by the second terminal device, and the priority of the LBT performed by the second terminal device.
  • the communication module 1101, before sending the indication information to the first terminal device is further configured to: receive a request message from the first terminal device, where the request message is used to request to share the first COT Corresponding frequency domain resources.
  • the processing module 1102 is further configured to determine to allow the first terminal device to share the frequency domain resource corresponding to the first COT.
  • the communication module 1101 is further configured to: send a response message to the first terminal device, where the response message is used to indicate that the first terminal device is allowed to share the frequency domain resource corresponding to the first COT.
  • the request message carries at least one of the following: a first parameter and a second parameter.
  • the first parameter is used to indicate the number of interleaved resource blocks included in the second frequency domain resource
  • the second parameter is used to indicate the size of the bandwidth of the first terminal device.
  • the processing module 1102 when the processing module 1102 is determined to allow the first terminal device to share the frequency domain resource corresponding to the first COT, it may be specifically configured to: according to the first parameter and the first frequency domain resource The number of interleaved resource blocks included is determined to allow the first terminal device to share the frequency domain resources corresponding to the first COT; and/or, according to the second parameter and the size of the bandwidth of the second terminal device, the allowed The first terminal device shares frequency domain resources corresponding to the first COT.
  • the response message carries at least one of the following: a third parameter and a fourth parameter.
  • the third parameter is used to indicate the position of the second frequency domain resource
  • the fourth parameter is used to indicate the position of the bandwidth of the first terminal device.
  • the third parameter indicates the serial number of the first interleaved resource block in the remaining interleaved resource blocks in the second frequency domain resource, and the remaining interleaved resource blocks include the frequency domain resources corresponding to the first COT except Interleaved resource blocks other than the first frequency domain resources.
  • the fourth parameter indicates an offset value of the bandwidth of the first terminal device relative to the bandwidth of the second terminal device.
  • each functional module in each embodiment of the present application can be integrated into a processing In the controller, it can also be physically present separately, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It can be understood that, for the function or implementation of each module in the embodiment of the present application, further reference may be made to the relevant description of the method embodiment.
  • the communication device may be as shown in Figure 12, the device may be a communication device or a chip in a communication device, where the communication device may be the first terminal device in the above embodiment or it may be the terminal device in the above embodiment in the second terminal device.
  • the device includes a processor 1201 and a communication interface 1202 , and may also include a memory 1203 .
  • the processing module 1102 may be the processor 1201 .
  • the communication module 1101 may be a communication interface 1202 .
  • the processor 1201 may be a CPU, or a digital processing unit or the like.
  • the communication interface 1202 may be a transceiver, or an interface circuit such as a transceiver circuit, or a transceiver chip or the like.
  • the device also includes: a memory 1203 for storing programs executed by the processor 1201 .
  • the memory 1203 can be a non-volatile memory, such as a hard disk (hard disk drive, HDD) or a solid-state drive (solid-state drive, SSD), etc., and can also be a volatile memory (volatile memory), such as a random access memory (random -access memory, RAM).
  • the memory 1203 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the processor 1201 is configured to execute the program codes stored in the memory 1203, and is specifically configured to execute the actions of the above-mentioned processing module 1102, which will not be repeated in this application.
  • the communication interface 1202 is specifically used to execute the actions of the above-mentioned communication module 1101, which will not be repeated in this application.
  • the embodiment of the present application does not limit the specific connection medium among the communication interface 1202, the processor 1201, and the memory 1203.
  • the memory 1203, the processor 1201, and the communication interface 1202 are connected through the bus 1204.
  • the bus is represented by a thick line in FIG. 12, and the connection mode between other components is only for schematic illustration. , is not limited.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 12 , but it does not mean that there is only one bus or one type of bus.
  • An embodiment of the present invention also provides a computer-readable storage medium for storing computer software instructions to be executed for executing the above-mentioned processor, which includes a program for executing the above-mentioned processor.
  • the embodiment of the present application also provides a communication system, including a communication device for implementing the function of the first terminal device in the embodiment described in FIG. 3-FIG. Two communication devices with terminal equipment functions.
  • the 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 combining 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 capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
  • the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

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

Abstract

La présente demande concerne un procédé et un appareil de communication de liaison latérale qui sont utilisés pour améliorer l'efficacité d'utilisation des ressources des communications de transmission en liaison latérale dans un spectre sans licence. Le procédé consiste à : recevoir des informations d'indication, les informations d'indication indiquant un paramètre qui est utilisé lorsqu'un deuxième dispositif terminal effectue une écoute avant transmission (LBT), ainsi qu'un paramètre d'une ressource de domaine fréquentiel qui est réellement utilisé par le deuxième dispositif terminal dans un premier temps d'occupation de canal (COT), et le premier COT étant utilisé pour que le deuxième dispositif terminal communique avec un troisième dispositif terminal ; et occuper un second COT d'après le paramètre qui est utilisé lorsque le second dispositif de terminal effectue une LBT, la ressource de domaine fréquentiel qui est utilisée par un premier dispositif terminal dans le second COT étant une ressource de domaine fréquentiel qui n'est pas utilisée par le second dispositif de terminal dans le premier COT, et le second COT étant utilisé pour que le premier dispositif terminal communique avec un quatrième dispositif terminal. Au moyen du procédé, un premier dispositif terminal peut communiquer avec un quatrième dispositif terminal en utilisant une ressource qui est occupée mais n'est pas utilisée par un second dispositif terminal, ce qui permet d'augmenter le taux d'utilisation des ressources.
PCT/CN2022/095698 2021-06-28 2022-05-27 Procédé et appareil de communication de liaison latérale WO2023273743A1 (fr)

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CN117676885A (zh) * 2022-08-09 2024-03-08 华为技术有限公司 侧行链路的信息交互方法、装置及可读存储介质
CN118368717A (zh) * 2023-01-17 2024-07-19 华为技术有限公司 一种通信方法及装置
WO2024197932A1 (fr) * 2023-03-31 2024-10-03 北京小米移动软件有限公司 Procédé et appareil d'interaction d'informations d'assistance
CN118785482A (zh) * 2023-04-07 2024-10-15 华为技术有限公司 通信方法和通信装置

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