WO2022198666A1 - 一种通信方法、终端装置及系统 - Google Patents

一种通信方法、终端装置及系统 Download PDF

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Publication number
WO2022198666A1
WO2022198666A1 PCT/CN2021/083402 CN2021083402W WO2022198666A1 WO 2022198666 A1 WO2022198666 A1 WO 2022198666A1 CN 2021083402 W CN2021083402 W CN 2021083402W WO 2022198666 A1 WO2022198666 A1 WO 2022198666A1
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Prior art keywords
information
symbol
terminal device
candidate
candidate resource
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PCT/CN2021/083402
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English (en)
French (fr)
Inventor
苏宏家
郭文婷
焦春旭
卢磊
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN202180094773.9A priority Critical patent/CN116897578A/zh
Priority to EP21932287.2A priority patent/EP4301066A4/en
Priority to PCT/CN2021/083402 priority patent/WO2022198666A1/zh
Publication of WO2022198666A1 publication Critical patent/WO2022198666A1/zh
Priority to US18/473,502 priority patent/US20240015711A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H04L5/0082—Timing of allocation at predetermined intervals
    • H04L5/0083—Timing of allocation at predetermined intervals symbol-by-symbol
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a communication method, a terminal device, and a system.
  • the direct communication between the terminal device and the terminal device can be called sideline communication.
  • the terminal device serving as the transmitting end can send sidelink control information to the terminal device serving as the receiving end through a sidelink (Sidelink, SL).
  • SL sidelink
  • At least one kind of SL information such as (sidelink control information, SCI), sideline data, feedback information, and reference signals.
  • SCI sidelink control information
  • the terminal device at the receiving end receives and decodes the sideline data by receiving the SCI.
  • the SCI is carried on the physical sidelink control channel (PSCCH), and the sidelink data can be carried on the physical sidelink shared channel (PSSCH).
  • PSSCH physical sidelink shared channel
  • the receiving end can decode the sideline data carried on the PSSCH only after correctly decoding the SCI carried on the PSCCH.
  • the terminal device needs to perform automatic gain control (automatic gain control, AGC) processing, so that the receiving terminal device can adjust the strength of the received signal to the strength required for accurate decoding.
  • AGC automatic gain control
  • the AGC mechanism requires the terminal device at the transmitting end to send the AGC information at the start symbol of the time slot, for example, the first symbol used for sidelink communication in the time slot, and the terminal device at the receiving end performs AGC according to the AGC information in order to receive correct reception.
  • SCI receive sideline data according to SCI.
  • the terminal device since the position of the AGC information in one time slot is fixed as the start symbol for sidelink communication, when the terminal device accesses after the start symbol for sidelink communication in one time slot channel, the terminal device can only wait for the next time slot to perform sidelink communication, resulting in increased sidelink communication delay.
  • the present application provides a communication method, terminal device and system for reducing the delay of sidelink communication.
  • an embodiment of the present application provides a communication method, and the method can be executed by a first terminal device and/or a second terminal device.
  • the first terminal device and/or the second terminal device may be a terminal or a component in a terminal such as a processor, a chip or a chip system, and the like.
  • the first end device and the second end device support sidelink communication.
  • the first terminal device and/or the second terminal device may acquire the first configuration information, and determine at least two consecutive candidate resources in the first time slot according to the first configuration information.
  • the candidate resource includes multiple consecutive symbols, and the multiple symbols include at least one first symbol and at least one second symbol.
  • the first symbol is used to transmit first information
  • the second symbol is used to transmit sidelink control information
  • the first symbol precedes the second symbol.
  • the first terminal device and/or the second terminal device may determine candidate resources according to the first configuration information, and perform sidelink communication according to the candidate resources. Since the first symbol in any candidate resource can be used for sending the first information, even if the channel access time of the first terminal device is located after the start time of the first symbol in one candidate resource of the first time slot, The first terminal device can also send the first information according to the first symbols of other candidate resources after the channel access time without waiting for the next time slot of the first time slot, so the sidelink communication delay can be reduced .
  • the first configuration information includes information on the number of consecutive second symbols in the candidate resource.
  • the first terminal device may also send the first information in the first symbol of the first candidate resource, and send the sidelink control information in the second symbol of the first candidate resource, the first candidate resource is the first candidate resource among the candidate resources after the first time, the first time is the channel access time of the first terminal device, and the first time is in the first time slot.
  • the first terminal device may also send the second information between the first moment and the start moment of the first candidate resource.
  • the channel already accessed by the first terminal device can be prevented from being occupied by other terminal devices, and the transmission delay can be further reduced.
  • the second information includes duplicate information of the first information, duplicate information of the side link control information, an extended cyclic prefix of the first information, or an extended cyclic prefix of the side link control information.
  • the first terminal device may also send third information on the first resource, the first resource includes the first symbol and/or the second symbol after the first candidate resource, and the third information is carried on the side in the uplink data channel.
  • the second terminal device may blindly detect the sidelink control information on the second symbol.
  • the second terminal device may stop blindly detecting the sidelink control information on the candidate resources in the first time slot to reduce processing overhead.
  • the second time is the time when the second terminal device obtains the sidelink control information carried by the second symbol in the first candidate resource, and the first candidate resource is one of the candidate resources.
  • the first candidate resource is one of the candidate resources.
  • the second terminal device may also decode the information carried on the second symbol of the ith candidate resource according to the result of the automatic gain control adjustment.
  • the second terminal device may further store at least one piece of fourth information, where the fourth information is on the first symbol and the second symbol of the j-th candidate resource in the candidate resources before the second moment in time carried information to improve transmission reliability.
  • fourth information is on the first symbol and the second symbol of the j-th candidate resource in the candidate resources before the second moment in time carried information to improve transmission reliability.
  • j 2, 3...n
  • n is the number of candidate resources located in the first time slot before the second time
  • the second time is the second terminal device obtained by the second symbol in the first candidate resource.
  • the first candidate resource is one of the candidate resources.
  • the second communication apparatus may further decode the fourth information after the first candidate resource and the information after the last fourth information according to the sidelink control information.
  • an embodiment of the present application provides a communication method, and the method may be executed by a network device or a component in the network device, such as a processor, a chip, or a chip system.
  • the network device supports configuring communication resources for sidelink communication.
  • the following description takes the network device as the execution subject as an example.
  • the network device may determine first configuration information, where the first configuration information is used to indicate at least two candidate resources in the first time slot, the candidate resources include a plurality of consecutive symbols, and the plurality of symbols include at least one A first symbol for transmitting first information and at least one second symbol for transmitting sidelink control information, the first symbol preceding the second symbol.
  • the network device can also be used to send the first configuration information.
  • the first configuration information includes information on the number of consecutive second symbols in the candidate resource.
  • an embodiment of the present application provides a communication method, and the method can be executed by a first terminal device.
  • the first communication device reference may be made to the description in the first aspect.
  • the first terminal device may transmit the first information in the first symbol of the first candidate resource, and transmit the sidelink control information in the second symbol of the first candidate resource, the first candidate resource is after the first time instant
  • the first moment is the channel access moment of the first terminal device, and the first moment is in the first time slot.
  • the first terminal device may also send the second information between the first moment and the start moment of the first candidate resource.
  • the channel already accessed by the first terminal device can be prevented from being occupied by other terminal devices, and the transmission delay can be further reduced.
  • the second information includes duplicate information of the first information, duplicate information of the side link control information, an extended cyclic prefix of the first information, or an extended cyclic prefix of the side link control information.
  • the first terminal device may also send third information on the first resource, the first resource includes the first symbol and/or the second symbol after the first candidate resource, and the third information is carried on the side in the uplink data channel.
  • first symbols and/or second symbols involved in the third aspect reference may be made to the descriptions in the first aspect.
  • an embodiment of the present application provides a communication method, and the method can be executed by a second terminal device.
  • the second communication device may refer to the description in the first aspect.
  • the second terminal device can blindly detect the sidelink control information on the second symbol.
  • the second terminal device may stop blindly detecting the sidelink control information on the candidate resources in the first time slot.
  • the second time is the time when the second terminal device obtains the sidelink control information carried by the second symbol in the first candidate resource, and the first candidate resource is one of the candidate resources.
  • the first candidate resource is one of the candidate resources.
  • the second terminal device may also decode the information carried on the second symbol of the ith candidate resource according to the result of the automatic gain control adjustment.
  • the second terminal device may further store at least one piece of fourth information, where the fourth information is on the first symbol and the second symbol of the j-th candidate resource in the candidate resources before the second moment in time carried information.
  • the fourth information is on the first symbol and the second symbol of the j-th candidate resource in the candidate resources before the second moment in time carried information.
  • j 2, 3...n
  • n is the number of candidate resources located in the first time slot before the second time
  • the second time is the second terminal device obtained by the second symbol in the first candidate resource.
  • the first candidate resource is one of the candidate resources.
  • the second communication apparatus may further decode the fourth information after the first candidate resource and the information after the last fourth information according to the sidelink control information.
  • the candidate resource the first symbol and/or the second symbol involved in the fourth aspect, reference may be made to the description in the first aspect.
  • an embodiment of the present application provides a communication device, which can implement the method implemented by the first communication device and/or the second communication device in the first aspect or any possible design thereof.
  • the apparatus comprises corresponding modules or units or components for carrying out the above-mentioned methods.
  • the modules included in the apparatus may be implemented by software and/or hardware.
  • the device may be, for example, a first communication device and/or a second communication device, or a component or a baseband chip, a chip system, or a processor that can support the first communication device and/or the second communication device to implement the above method.
  • the communication device may include a transceiver module or a communication module, and a processing module or a processing unit and other modular components, and these modules may implement the first communication device and/or the first communication device and/or the first aspect or any possible design thereof.
  • the transceiver module may be a transmitter or a receiver, or a transceiver obtained by integrating a transmitter and a receiver; the transceiver module may be a transmission module or a reception module, or It is obtained by integrating the sending module and the receiving module.
  • the transceiver module may include a communication interface, an antenna and/or a radio frequency circuit, etc., and the processing module may be a processor, such as a baseband chip.
  • the transceiver module may be a radio frequency module or a communication interface, and the processing module may be a processor.
  • the transceiver module may be an input/output interface of the system-on-chip, and the processing module may be a processor of the system-on-chip, such as a central processing unit (CPU).
  • CPU central processing unit
  • the communication device when the communication device is implemented by a software module, the communication device may include a transceiver module and/or a processing module.
  • the communication device when the communication device is implemented by hardwareized components, the communication device may include a transceiver and/or a processor.
  • a transceiver module or transceiver may be used to perform the actions of receiving and/or sending performed by the first communication device and/or the second communication device in the first aspect or any possible designs thereof.
  • a processing module or processor may be used to perform actions other than receiving and transmitting performed by the first communication device and/or the second communication device in the first aspect or any possible designs thereof.
  • the transceiver module can be used to acquire the first configuration information
  • the processing module can be used to determine at least two consecutive candidate resources in the first time slot according to the first configuration information.
  • the transceiver module is further configured to send the first information in the first symbol of the first candidate resource, and send the sidelink control information in the second symbol of the first candidate resource.
  • first information and the sidelink control information reference may be made to the description in the first aspect.
  • the transceiver module may also be configured to send the second information between the first moment and the start moment of the first candidate resource.
  • the first candidate resource, the first moment, and the second information reference may be made to the description in the first aspect.
  • the transceiver module may also be configured to send third information on the first resource, and reference may be made to the description in the first aspect for the first resource and the third information.
  • the transceiver module may be configured to blindly detect sidelink control information on the second symbol.
  • the transceiver module may stop blindly detecting the sidelink control information on the candidate resources in the first time slot.
  • the transceiver module may stop blindly detecting the sidelink control information on the candidate resources in the first time slot.
  • the transceiver module may be further configured to perform automatic gain control adjustment according to the information carried on the first symbol of the i-th candidate resource in the candidate resources before the second moment, and adjust according to the automatic gain control The result of decoding the information carried on the second symbol of the ith candidate resource.
  • i can refer to the description in the first aspect.
  • the processing module may be used to store at least one fourth piece of information.
  • fourth information reference may be made to the description in the first aspect.
  • the transceiver module is further configured to decode the fourth information after the first candidate resource and the information after the last fourth information according to the sidelink control information.
  • an embodiment of the present application provides a communication apparatus, which can implement the method implemented by a network device in the second aspect or any possible design thereof.
  • the apparatus comprises corresponding modules or units or components for carrying out the above-mentioned methods.
  • the modules included in the apparatus may be implemented by software and/or hardware.
  • the apparatus may be, for example, a network device, or a component or a baseband chip, a system-on-chip, or a processor that can support the network device to implement the above method.
  • the communication apparatus may include a transceiver module or a communication module, and a processing module or a processing unit and other modular components, and these modules may perform the corresponding functions of the network device in the second aspect or any possible design thereof.
  • the transceiver module can be a transmitter or a receiver, or a transceiver obtained by integrating a transmitter and a receiver; the transceiver module can be a sending module or a receiving module, or a sending module and a receiving module integrated.
  • the transceiver module may include a communication interface, an antenna and/or a radio frequency circuit, and the like, and the processing module may be a processor, such as a baseband chip.
  • the transceiver module may be a radio frequency module or a communication interface, and the processing module may be a processor.
  • the transceiver module may be an input and output interface of the chip system, and the processing module may be a processor of the chip system, such as a central processing unit.
  • the communication device when the communication device is implemented by a software module, the communication device may include a transceiver module and/or a processing module.
  • the communication device when the communication device is implemented by hardwareized components, the communication device may include a transceiver and/or a processor.
  • a transceiving module or transceiver may be used to perform the actions of receiving and/or transmitting performed by the network device in the second aspect or any possible designs thereof.
  • a processing module or processor may be used to perform actions other than receiving and transmitting performed by the network device in the second aspect or any possible designs thereof.
  • the processing module can be used to determine the first configuration information
  • the sending module can be used to send the first configuration information.
  • first configuration information reference may be made to the description in the first aspect.
  • an embodiment of the present application provides a communication apparatus, which can implement the method implemented by the first communication apparatus in the third aspect or any possible design thereof.
  • the apparatus comprises corresponding modules or units or components for carrying out the above-mentioned methods.
  • the modules included in the apparatus may be implemented by software and/or hardware.
  • the device may be, for example, a first communication device, or a component or a baseband chip, a chip system, or a processor that can support the first communication device to implement the above method.
  • the communication device may include a transceiver module or a communication module, and a processing module or a processing unit and other modular components, and these modules may perform the corresponding functions of the first communication device in the third aspect or any possible design thereof.
  • the transceiver module may be a transmitter or a receiver, or a transceiver obtained by integrating a transmitter and a receiver; the transceiver module may be a sending module or a receiving module, or a sending module and a receiving module are integrated. of.
  • the transceiver module may include a communication interface, an antenna and/or a radio frequency circuit, and the like, and the processing module may be a processor, such as a baseband chip.
  • the transceiver module may be a radio frequency module or a communication interface, and the processing module may be a processor.
  • the transceiver module may be an input and output interface of the chip system, and the processing module may be a processor of the chip system, such as a central processing unit.
  • the communication device when the communication device is implemented by a software module, the communication device may include a transceiver module and/or a processing module.
  • the communication device when the communication device is implemented by hardwareized components, the communication device may include a transceiver and/or a processor.
  • a transceiving module or transceiver may be used to perform the actions of receiving and/or transmitting performed by the first communication device in the third aspect or any possible designs thereof.
  • a processing module or processor may be used to perform actions other than receiving and transmitting performed by the first communication device in the third aspect or any possible designs thereof.
  • the transceiving module can be configured to transmit the first information in the first symbol of the first candidate resource, and transmit the sidelink control information in the second symbol of the first candidate resource.
  • first information and the sidelink control information reference may be made to the description in the first aspect.
  • the transceiver module may also be configured to send the second information between the first moment and the start moment of the first candidate resource.
  • the first candidate resource, the first moment, and the second information reference may be made to the description in the first aspect.
  • the transceiver module may also be configured to send third information on the first resource, and reference may be made to the description in the first aspect for the first resource and the third information.
  • an embodiment of the present application provides a communication device, which can implement the method implemented by the second communication device in the fourth aspect or any possible design thereof.
  • the apparatus comprises corresponding modules or units or components for carrying out the above-mentioned methods.
  • the modules included in the apparatus may be implemented by software and/or hardware.
  • the device may be, for example, a second communication device, or a component or a baseband chip, a chip system, or a processor that can support the second communication device to implement the above method.
  • the communication device may include a transceiver module or a communication module, and a processing module or a processing unit and other modular components, and these modules may perform the corresponding functions of the second communication device in the fourth aspect or any possible design thereof.
  • the transceiver module can be a transmitter or a receiver, or a transceiver obtained by integrating a transmitter and a receiver; the transceiver module can be a sending module or a receiving module, or a sending module and a receiving module are integrated. of.
  • the transceiver module may include a communication interface, an antenna and/or a radio frequency circuit, and the like, and the processing module may be a processor, such as a baseband chip.
  • the transceiver module may be a radio frequency module or a communication interface, and the processing module may be a processor.
  • the transceiver module may be an input and output interface of the chip system, and the processing module may be a processor of the chip system, such as a central processing unit.
  • the communication device when the communication device is implemented by a software module, the communication device may include a transceiver module and/or a processing module.
  • the communication device when the communication device is implemented by hardwareized components, the communication device may include a transceiver and/or a processor.
  • a transceiving module or transceiver may be used to perform the actions of receiving and/or transmitting performed by the second communication device in the fourth aspect or any possible designs thereof.
  • a processing module or processor may be used to perform actions other than receiving and transmitting performed by the second communication device in the fourth aspect or any possible designs thereof.
  • the transceiving module can be configured to blindly detect the sidelink control information on the second symbol.
  • the transceiver module may stop blindly detecting the sidelink control information on the candidate resources in the first time slot.
  • the transceiver module may stop blindly detecting the sidelink control information on the candidate resources in the first time slot.
  • the transceiver module may be further configured to perform automatic gain control adjustment according to the information carried on the first symbol of the i-th candidate resource in the candidate resources before the second moment, and adjust according to the automatic gain control The result of decoding the information carried on the second symbol of the ith candidate resource.
  • i can refer to the description in the first aspect.
  • the processing module may be used to store at least one fourth piece of information.
  • fourth information reference may be made to the description in the first aspect.
  • the transceiver module is further configured to decode the fourth information after the first candidate resource and the information after the last fourth information according to the sidelink control information.
  • a communication system in a ninth aspect, includes the communication apparatus shown in the fifth to sixth aspects, that is, includes a first communication apparatus and/or a second communication apparatus for executing the method shown in the first aspect an apparatus, and a network device for performing the method of the second aspect.
  • the communication system may include the communication devices shown in the seventh to the eighth aspects, that is, including the first communication device for executing the method shown in the third aspect, and the first communication device for executing the method shown in the fourth aspect. 2. Communication device.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used to store computer instructions, and when the computer instructions are executed on a computer, the computer is made to execute the above-mentioned first to fourth aspects or any of them.
  • An eleventh aspect provides a computer program product comprising instructions, the computer program product is used to store computer instructions, when the computer instructions are executed on a computer, the computer is made to execute the above-mentioned first to fourth aspects or any of them The method shown in one possible implementation.
  • a twelfth aspect provides a circuit coupled to a memory, the circuit being used to perform the method shown in the above-mentioned first to fourth aspects or any one of possible implementations thereof.
  • the circuit may comprise a chip and/or chip circuitry.
  • FIG. 1 is an example diagram of a scenario of sidelink communication provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of network coverage of sidelink communication according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a comparison between a physical time slot and a logical time slot according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of an AGC position provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a communication device according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another communication device provided by an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a method provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a candidate resource provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of resources for sending by a terminal device according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of resources sent by another terminal device according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of resources for sending by another terminal device according to an embodiment of the present application.
  • a terminal device such as a terminal device, or a module for realizing the functions of the terminal device, such as a chip system, and the chip system can be set in the terminal device.
  • the terminal device includes a device that provides data connectivity to a user, specifically, includes a device that provides data connectivity to a user, or includes a device that provides data connectivity to a user. For example, it may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem.
  • the terminal equipment can communicate with the core network via a radio access network (RAN), exchange data with the RAN, or exchange voice and data with the core network.
  • RAN radio access network
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, vehicle to everything (V2X) communication End devices, machine-to-machine/machine-type communications (M2M/MTC) end devices, Internet of things (IoT) end devices.
  • UE user equipment
  • D2D device-to-device
  • V2X vehicle to everything
  • M2M/MTC machine-to-machine/machine-type communications
  • IoT Internet of things
  • the terminal device may be a vehicle, a ship, or an aircraft, or a terminal-type roadside unit, or a communication module or chip built into the vehicle or roadside unit.
  • direct communication (PC5) interface communication is supported between terminal devices, that is, transmission through a side link is supported.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It 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 device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • Use such as all kinds of 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 to be on-board terminal equipment.
  • the on-board terminal equipment is also called an on-board unit (OBU).
  • OBU on-board unit
  • the terminal device may further include a relay (relay).
  • a relay relay
  • any device capable of data communication with the base station can be regarded as a terminal device.
  • a roadside unit can also be regarded as a terminal device.
  • the communication method provided by the embodiment of the present application may be described by taking a terminal device as an example.
  • the side that transmits sideline data may be referred to as a sender terminal device, and the side used for sideline data reception may be referred to as a receiver terminal device.
  • the terminal device at the transmitting end is referred to as the first terminal device, and the terminal device at the receiving end is referred to as the second terminal device.
  • Network equipment including, for example, access network (AN) equipment, such as a base station, may refer to equipment in the access network that communicates with terminal devices through one or more cells over the air interface, or, for example, a V2X technology
  • the network equipment in is a roadside unit (RSU).
  • the RSU can be a fixed infrastructure entity supporting V2X applications and can exchange messages with other entities supporting V2X applications.
  • the network equipment may include an Evolved Universal Terrestrial Radio Access Network Node B (E-UTRAN Node B, eNB), a next generation Node B (next generation node B) in the fifth generation mobile communication technology (the 5th generation, 5G) NR system, gNB), or may also include a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, Cloud RAN) system, the embodiment of the present application is not limited .
  • the network devices described refer to access network devices.
  • network equipment and/or access network equipment may be represented by base stations.
  • the apparatus for implementing the function of the network device may be the network device, or may be an apparatus capable of supporting the network device to implement the function, such as a chip system, and the apparatus may be installed in the network device.
  • the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.
  • V2X communication is aimed at high-speed equipment represented by vehicles, and is the basic technology and key technology for future applications in scenarios with very high communication delay requirements.
  • the application areas of V2X communication include smart cars, autonomous driving, and intelligent transportation systems.
  • typical V2X communication scenarios include vehicle-to-vehicle communication (V2V), vehicle-to-pedestrian (V2P) communication, vehicle-to-infrastructure communication (vehicle to infrastructure, V2I) or vehicle to network (V2N).
  • V2V vehicle-to-vehicle communication
  • V2P vehicle-to-pedestrian
  • V2I vehicle-to-infrastructure communication
  • V2N vehicle to network
  • the first terminal device and/or the second terminal device may be a vehicle or an in-vehicle terminal device located in the vehicle, or the like.
  • one of the first terminal device and the second terminal device may be a vehicle or a vehicle-mounted terminal device in a vehicle, and the other may be a mobile terminal, wearable device, or other terminal device carried by pedestrians.
  • one of the first terminal device and the second terminal device may be a vehicle or an in-vehicle terminal device located in the vehicle, and the other may be an infrastructure such as an RSU.
  • one of the first terminal device and the second terminal device may be a vehicle or an in-vehicle terminal device located in the vehicle, and the other may be a base station.
  • the first terminal device can use its own position, speed and other status information, or driving intention information such as turning, merging or reversing, or information triggered by periodic or aperiodic events, as side-travel data. surrounding terminal devices. Likewise, the first terminal device may also receive sideline data from other surrounding terminal devices. In addition, the first terminal device may also forward the received sideline data of other terminal devices. Exemplarily, the sideline data and/or the sideline feedback information are carried on the PSSCH.
  • the sideline feedback information may include hybrid automatic repeat request (HARQ) feedback information, such as acknowledgement (acknowledgment, ACK) or negative acknowledgement (negative acknowledgement, NACK), and may also include channel state information (channel state information) , CSI) feedback information.
  • HARQ hybrid automatic repeat request
  • ACK acknowledgement
  • NACK negative acknowledgement
  • channel state information channel state information
  • CSI channel state information
  • V2X communication can support communication scenarios with and without network coverage.
  • the resource allocation mode when the first terminal device transmits through V2X communication may adopt a network equipment scheduling mode.
  • the resource used by the terminal device for sidelink communication, which is scheduled and sent by the network device may be referred to as a licensed resource or a licensed frequency band.
  • the first terminal device can perform the self-selection of resources, that is, Resources for sidelink communication are selected from the resource pool, which may be referred to as unlicensed resources or unlicensed frequency bands. It should be understood that the resources in this application refer to time-frequency resources.
  • the terminal device can receive the system information block (SIB) of the network device, the cell-specific radio resource control (RRC) signaling or the user-level signaling of the terminal device.
  • SIB system information block
  • RRC radio resource control
  • UE-specific RRC signaling obtains SL resource pool (resource pool) configuration information and/or SL bandwidth part (bandwidth part, BWP) configuration information.
  • the end device may also use preconfigured SL resource pool configuration information or SL BWP configuration information, for example, when there is no network coverage.
  • the SL resource pool configuration information includes resource pool resource information, and the resource pool resource information is used to indicate the SL resource pool.
  • the resource pool is a collection of time-frequency resources used for sidelink communication between UEs.
  • the resource pool may include code domain resources.
  • the resources of the resource pool are used to include the resources for the terminal device to send and receive at least one of the following physical channels, such as PSCCH, PSSCH, PSDCH, PSFCH, PSBCH, etc.
  • the types of services carried by PSSCH may include unicast, multicast and/or broadcast Communication type.
  • the time domain of the SL resource pool it includes one or more time units, and the time unit can be one or several symbols, one or several time slots (slot), one or several mini-slots (mini-slot), One or several subframes, or, one or several frames, etc.
  • One or more time units can be continuous in time or discrete. It should be understood that the time domain units are logically consecutive within a resource pool.
  • time slot 1 to time slot 8 are time slots that are continuous in time, and such time slots are called physical time slots (physical slots).
  • the physical time slots - time slot 1, time slot 3, time slot 5 and time slot 8 are configured as time slots belonging to one resource pool. Since the time slots contained in the resource pool may be discontinuous in time, from the perspective of the resource pool, time slot 1, time slot 3, time slot 5 and time slot 8 on the physical time slot correspond to resources. Slot 1', Slot 2', Slot 3' and Slot 4' in the pool, then.
  • the consecutive time slots (ie, time slot 1', time slot 2', time slot 3' and time slot 4') included in the resource pool are logically consecutive time slots in the resource pool, which are called logically continuous time slots.
  • the frequency domain of the SL resource pool includes one or more frequency domain units, and the frequency domain unit may be a resource element (resource element, RE), several REs, a resource block (resource block, RB), several RBs , a sub-channel, several sub-channels.
  • the size of the subchannel indicates that a subchannel includes one or more continuous or interlaced RBs in the frequency domain, and may be an integer such as 10, 12, 15, 20, 25, or 50.
  • Interleaved RBs are one form of discrete RBs. For example, multiple RBs included in a subchannel are interleaved, which means that there is at least one RB that does not belong to the subchannel between any two adjacent RBs included in the subchannel.
  • the SL resource pool configuration information may also include PSCCH configuration information, where the PSCCH configuration information includes the number of symbols occupied by the PSCCH in one time slot and the number of RBs occupied by the PSCCH in one subchannel.
  • the SL BWP configuration information may include SL resource pool information, which is used to configure the number of resource pools included in the BWP.
  • the SL BWP configuration information may include SL bandwidth information for indicating the size of the bandwidth for SL communication, for example, indicating that the SL bandwidth is 20 megahertz (MHz).
  • the SL BWP configuration information may also include SL symbol information, which is used to indicate the starting SL symbol position on a time slot and the number of occupied consecutive SL symbols.
  • the SL BWP configuration information may also include subcarrier spacing and cyclic prefix information of the SL, which are used to indicate the subcarrier spacing and cyclic prefix used for SL communication.
  • the cyclic prefix indicates an extended cyclic prefix or a normal cyclic prefix.
  • the SL BWP configuration information may also include SL resource pool configuration information.
  • the time slot is used for description, but it is not limited to the time unit only.
  • the unit is sub-channel only.
  • the transmitting end terminal device accesses the signal in a competitive manner, for example, in accordance with the channel access method defined by the European Telecommunications Standards Institute (ETSI).
  • ETSI European Telecommunications Standards Institute
  • the competing access methods mainly include load-based equipment (LBE) and frame-based equipment (FBE).
  • LBE and FBE require terminal devices to perform listen before talk (LBT).
  • energy-based detection may be employed when accessing unlicensed bands.
  • Energy-based detection needs to set a detection threshold (energy detection threshold). When the channel energy detected by the terminal device exceeds the detection threshold, it is determined that the channel is busy, and the channel is not allowed to access. When the detected channel energy is lower than the detection threshold, if it lasts for more than a period of time, such as 34 microseconds ( ⁇ s), backoff is allowed to start.
  • the size of the backoff window is related to the service priority. The higher the priority, the smaller the backoff window.
  • the terminal device randomly selects a backoff value K in the backoff window to back off.
  • the K value is reduced by 1, until the back-off value K is reduced to 0, then the access channel is allowed to communicate. time.
  • the backoff value K if the energy detected by the terminal device is higher than the detection threshold, the channel is busy and the backoff is stopped. Until the energy detected for 34 ⁇ s again is lower than the detection threshold, the backoff is resumed, that is, the backoff is resumed according to the backoff value when the backoff was stopped last time.
  • a sidelink communication resource refers to a time-frequency resource in a resource pool for sidelink communication, on which a transmitting terminal device can transmit sidelink information.
  • One or more of reference signals such as PSCCH, PSSCH, physical sidelink feedback channel (PSFCH) and demodulation reference signal (DMRS) can be carried on one resource.
  • the time-domain scheduling unit of the sideline resource can be a time slot or a mini-slot, and the frequency-domain scheduling unit can be a sub channel, or a continuous or interlaced one. or multiple RBs.
  • PSCCH may exist in each subchannel in each time slot, that is, the time domain start position of one PSCCH is the second symbol used for sidelink communication in each time slot. start time.
  • a symbol may be an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol (symbol).
  • the number of consecutive symbols occupied by the PSCCH may be determined by the resource pool configuration information, such as 1, 2, or 3 symbols and other symbols that do not exceed 14 symbols.
  • the starting position of the PSCCH in the frequency domain is the physical resource block (PRB) with the smallest index in each subchannel.
  • PRB physical resource block
  • the number of RBs occupied by the PSCCH can be determined by the SL resource pool configuration information. The number of RBs in size.
  • the first terminal device and the second terminal device communicating through the SL may be different, so for a second terminal device, it is not at the same time
  • the first terminal device of the SL communication received in the time slot may be different, or in other words, the first terminal device of the SL communication received in different time slots may be located in different geographical locations, so there is a near-far effect, causing the second terminal device to be in different time slots.
  • the received signal strength of a slot may vary over a wide dynamic range and is unpredictable. If the received signal strength of the sidelink is not within a suitable strength range of the second terminal device, the second terminal device may not be able to accurately decode the sidelink information.
  • the sidelink information includes at least one type of information, such as sidelink discovery information, sidelink control information, sidelink data information, sidelink feedback information, sidelink synchronization information, or sidelink pilot information.
  • AGC is introduced into the sidelink communication, or AGC adjustment, that is, the second terminal device adjusts the received signal strength in the receiving chain to A specific desired power for optimal performance, thus satisfying the signal-to-noise ratio (SNR) required for correct decoding.
  • SNR signal-to-noise ratio
  • the AGC algorithm will increase the gain level of the receiver of the second terminal device, so that the SNR of the received signal reaches an acceptable range. If the received signal strength is strong, the AGC algorithm attenuates the receive gain stage to avoid the degradation of SNR caused by signal clipping and nonlinear degradation.
  • the first terminal device copies all the information of the second symbol used for sidelink communication in one time slot to the On the first symbol of the sidelink communication, for the convenience of description, the information copied to the first symbol is called AGC information.
  • AGC information the information copied to the first symbol.
  • the first terminal device has the same transmit power on symbols in one time slot, and the second terminal device only needs to use one time slot for sidelink communication Doing the AGC once for the first symbol ensures that the AGC result is consistent for the entire time slot. That is to say, according to the AGC result of this time, it can be ensured that the received signal strength is within the acceptable range in this time slot.
  • the second terminal device performs AGC processing on the AGC information on the first symbol used for sidelink communication, obtains an AGC result, and then uses the remaining time slot for the sidelink according to the AGC result.
  • the sidelink information includes the SCI and the sideline data. Therefore, the reception and adjustment of the AGC information is necessary to correctly receive the SCI and the sideline data.
  • the control information used for scheduling sideline data is represented by SCI in this application, and the present application does not limit the control information used for scheduling sideline data to have other names.
  • the first terminal device needs to perform LBT to access the channel for communication (eg, access the channel of the unlicensed spectrum) ), then in this time slot, the first terminal device must complete the LBT at the start of the first symbol in the time slot and then access the channel, so that the AGC information can be sent in the first symbol, so that the second terminal is in the AGC adjustment is performed on the time slot, and then the sidelink information sent by the first terminal is received. Therefore, if the first terminal device cannot transmit AGC information on the first symbol used for sidelink communication in the time slot, the second terminal cannot perform AGC on the first symbol of sidelink communication. If the adjustment is made, the sidelink information sent by the first terminal cannot be correctly received in this time slot. The first terminal can only wait for the AGC information to be sent on the first symbol of the next time slot, thus increasing the sidelink communication delay.
  • the embodiment of the present application provides a communication method, which is used to reduce the delay of sidelink communication.
  • the communication method may be performed by the first terminal device and/or the second terminal device.
  • the first terminal device may be used to transmit to the second terminal device through the sidelink.
  • the following describes possible structures of the first terminal device and/or the second terminal device provided by the embodiments of the present application with reference to FIG. 5 and FIG. 6 .
  • FIG. 5 shows a schematic structural diagram of a possible first terminal device and/or a second terminal device, and the structure may include a processing module 510 and a transceiver module 520 .
  • the structure shown in FIG. 5 may be a terminal device, or may be a chip applied in the terminal device or other combined devices, components or assemblies having the functions of the terminal device shown in this application.
  • the transceiver module 520 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc.
  • the processing module 510 may be a processor, such as a baseband processor, and the baseband processor may include one or more central Processing unit (central processing unit, CPU).
  • CPU central processing unit
  • the transceiver module 520 may be a radio frequency unit, and the processing module 510 may be a processor, such as a baseband processor.
  • the transceiver module 520 may be an input/output interface of a chip, such as a baseband chip, and the processing module 510 may be a processor of the chip system, which may include one or more central processing units.
  • the processing module 510 in this embodiment of the present application may be implemented by a processor or a circuit component related to the processor, and the transceiver module 520 may be implemented by a transceiver or a circuit component related to the transceiver.
  • the processing module 510 may be configured to perform all operations performed by the first terminal device and/or the second terminal device in any embodiment of the present application except for the transceiving operations, such as processing operations, and/or for supporting Other processes of the techniques described herein, such as generating messages, information and/or signaling sent by transceiving module 520 and processing messages, information and/or signaling received by transceiving module 520 .
  • the transceiver module 520 may be configured to perform all receiving and sending operations performed by the first terminal device and/or the second terminal device in any of the embodiments of the present application, and/or other processes used to support the techniques described herein, For example the transmission and/or reception of data.
  • the transceiver module 520 can be a functional module that can perform both sending and receiving operations.
  • the transceiver module 520 can be used to perform all sending operations and/or all sending operations performed by the relay node and/or the remote node.
  • the transceiver module 520 can be considered as a sending module, and when performing a receiving operation, the transceiver module 520 can be considered as a receiving module;
  • the module 520 can be regarded as a general term for these two functional modules, and the two functional modules are respectively a sending module and a receiving module, and the sending module is used to complete the sending operation, for example, the sending module can be used to perform the execution by the first terminal device and/or the first terminal device.
  • the receiving module is used to complete the receiving operation, and the receiving module can be used to perform all the receiving operations performed by the first terminal device and/or the second terminal device.
  • FIG. 6 shows a schematic structural diagram of another terminal device, which is used to perform the actions performed by the first terminal device and/or the second terminal device provided by the embodiments of the present application.
  • the terminal device may include a processor, a memory, a radio frequency circuit, an antenna and/or an input/output device.
  • the processor is mainly used to process communication protocols and communication data, control terminal devices, execute software programs, process data of software programs, and the like.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • only one memory and processor are shown in FIG. 6 . In an actual end device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or a storage device or the like.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit with a transceiving function may be regarded as the transceiving unit of the terminal device.
  • the transceiver unit may be a functional unit capable of implementing a sending function and a receiving function; or, the transceiver unit may also include two functional units, a receiving unit capable of implementing a receiving function and a transmitting unit capable of implementing a transmitting function.
  • the processor with processing function can be regarded as the processing unit of the terminal device. As shown in FIG. 6 , the terminal device includes a transceiver unit 610 and a processing unit 620 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the processing unit may also be referred to as a processor, a processing single board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the transceiver unit 610 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 610 may be regarded as a transmitting unit, that is, the transceiver unit 610 includes a receiving unit and a transmitting unit.
  • the transceiver unit may also sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like.
  • the transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • the transceiver unit 610 may correspond to the transceiver module 520 , or the transceiver module 520 may be implemented by the transceiver unit 610 .
  • the transceiver unit 610 is configured to perform the sending and/or receiving operations of the first terminal device and/or the second terminal device in the embodiments shown in this application, and/or to support other processes of the technology described herein.
  • the processing unit 620 may correspond to the processing module 510 , or in other words, the processing module 510 may be implemented by the processing unit 620 .
  • the processing unit 620 is configured to perform other operations other than the sending and receiving operations of the first terminal device and/or the second terminal device in the embodiment shown in the present application, for example, is configured to perform the operations performed by the first terminal device and/or the second terminal device in the embodiment shown in the present application. Or all operations performed by the second terminal device except receiving and transmitting, and/or other processes used to support the techniques described herein.
  • the structures shown in FIG. 5 and/or FIG. 6 may also be used to implement a network device or components of a network device, such as a base station, a CU, or a DU.
  • the processing module 510 shown in FIG. 5 and/or the processing unit 620 shown in FIG. 6 may be used to implement the processing steps performed by the base station in the communication method provided by the embodiments of the present application and/or other than the reception and transmission performed by the base station operation.
  • the transceiver module 520 shown in FIG. 5 and/or the transceiver unit 610 shown in FIG. 6 may be used to implement the receiving operation and/or the sending operation performed by the base station in the communication method provided by the embodiment of the present application.
  • the structure shown in FIG. 6 is used to implement a network device, the structure may not include an input and output device.
  • the network device or a component of the network device may be referred to as a third communication device.
  • the first terminal device and/or the second terminal device acquire the first configuration information.
  • the first configuration information may be used by the first terminal device and/or the second terminal device to determine at least two candidate locations for AGC information and at least two candidate locations for PSCCH in one time slot. Therefore, even if the time when the first terminal device accesses the channel is located after a certain candidate position of AGC information in a time slot, the first terminal device can still be in the time slot according to the candidate position of the AGC information after the channel access time The AGC information is sent without waiting for the arrival of the next time slot, so the sidelink communication delay can be reduced.
  • the first terminal device and/or the second terminal device is implemented by the structures shown in FIG. 5 and/or FIG. 6
  • the first terminal device and/or the second terminal may be implemented by the structures shown in FIG. 5 and/or FIG. 6
  • the first terminal device and/or the second terminal The receiving and sending actions performed by the device may be performed by the transceiver module 520 shown in FIG. 5 and/or the transceiver unit 610 shown in FIG. 6 ; in the communication method provided by the embodiment of the present application, the first terminal device and/or the second terminal
  • the processing actions performed by the apparatus, and other actions except the receiving and sending actions may be performed by the processing module 510 shown in FIG. 5 and/or the processing unit 620 shown in FIG. 6 .
  • the receiving and sending actions performed by the network device in the communication method provided by the embodiment of the present application can be performed by the transceiver module shown in FIG. 5 . 520 and/or the transceiver unit 610 shown in FIG. 6 ; the processing actions performed by the network device in the communication method provided by the embodiment of the present application, and other actions except the receiving and sending actions can be performed by the processing module 510 shown in FIG. 5 . and/or executed by the processing unit 620 shown in FIG. 6 .
  • the communication method provided by the embodiment of the present application may include the following steps:
  • S101 The first terminal device and/or the second terminal device respectively acquire first configuration information.
  • the obtaining in this application includes obtaining by means of receiving, and may also include obtaining by means of reading from memory.
  • the present application does not specifically limit the timings for the first terminal device and the second terminal device to obtain the first configuration information respectively. It is only required that the first terminal device and the second terminal device obtain the first configuration information before the sidelink communication. Can.
  • the first terminal device and/or the second terminal device may receive the first configuration information from the network device.
  • the network device may send the first configuration through a system information block (SIB), cell-specific (cell-specific) radio resource control (RRC) signaling, or user-level (UE-specific) RRC signaling information.
  • SIB system information block
  • RRC radio resource control
  • UE-specific user-level
  • the second terminal device may also acquire the first configuration information from the first terminal device.
  • the first terminal device configures or instructs the obtained first configuration information to the PC5 air interface RRC signaling, SL media access control layer control element (media access control control element, MAC CE) and at least one bearer mode such as SCI. second terminal device.
  • SL media access control layer control element media access control control element, MAC CE
  • the first terminal device may also acquire the first configuration information from the second terminal device.
  • the second terminal device configures or instructs the acquired first configuration information to the first terminal device through at least one bearer mode such as PC5 air interface RRC signaling, SL MAC CE, and SCI.
  • the first configuration information may include SL BWP configuration information and/or SL resource pool configuration information.
  • the first terminal device and/or the second terminal device may receive the first configuration information from the same network device or from different network devices.
  • the acquisition in S101 includes receiving and reading.
  • the reading is obtained, for example, from local storage.
  • the first configuration information may be stored in the first terminal device and/or the second terminal device, then in S101, the first terminal device and/or the second terminal device read Local storage to obtain the first configuration information.
  • the first configuration information may be preconfigured in the first terminal device and/or the second terminal device.
  • the first terminal device and/or the second terminal device determine at least two consecutive candidate resources in the first time slot according to the first configuration information.
  • the two consecutive candidate resources refer to that the number of the last symbol of the former candidate resource and the number of the first symbol of the latter candidate resource are consecutive in the time domain.
  • the first time slot includes symbols and/or gap symbols for sideline communication.
  • the symbols used for sidelink communication refer to symbols in the first time slot that can be used to transmit sidelink information.
  • the interval symbol is used by the terminal equipment to process transceiving and/or considering transmission delay, and is not used to transmit sidelink information.
  • the position and number of symbols used for sideline communication may be determined by a first configuration indication or an end-user indication or pre-configuration.
  • the candidate resources may include consecutive symbols in the first time slot for sidelink communication.
  • the plurality of symbols includes at least one first symbol and at least one second symbol.
  • the first symbol may be used to transmit the first information, or in other words, the first symbol is a candidate resource of the first information.
  • the second symbol can be used to transmit the SCI, or the second symbol is a candidate resource for the SCI, or the second symbol can be occupied by the PSCCH.
  • the number of second symbols included in the candidate resource is the number of consecutive symbols occupied by the PSCCH.
  • the first symbol may be used to transmit the first information
  • the second symbol may be used to transmit the SCI.
  • the first symbol is located before the second symbol, or in other words, all the first symbols in the candidate resource are located before the first second symbol of the candidate resource.
  • the first information is AGC information, that is, information for the second terminal device to perform AGC.
  • the first information may be the replica information of the SCI or the replica information of a subset of the SCI, where the SCI refers to the SCI carried in the second symbol.
  • the copy information of a subset of SCI refers to copying a part of the information of the SCI.
  • the number of symbols occupied by the PSCCH carrying the SCI is greater than one symbol, only the SCI on a part of the symbols is copied as the first information.
  • the copy information of the SCI subset is the information of the first symbol on the PSCCH carrying the SCI.
  • the first information may also be replica information of the information on any symbol on the first time slot.
  • the first information may also be a sequence for AGC adjustment.
  • the first configuration information may indicate the starting position of the symbol used for sideline communication in the first time slot, using Represents the index of the first symbol in the first slot for sidelink communication.
  • the first configuration information may also indicate the number of symbols used for sideline communication in the first time slot, using express.
  • the first configuration information may also indicate the number of consecutive symbols occupied by the PSCCH in the first time slot, and the number is also the number of second symbols in the candidate resource. express.
  • the first configuration information may also indicate the minimum number of symbols used for sidelink communication on a time slot, using means, that is, the number of symbols included in a time slot for sideline communication is not less than in addition, It can also be a value determined by the first terminal device and/or the second terminal device, a value preconfigured in the first terminal device and/or the second terminal device, or a value predefined in a standard, such as predefined
  • the index of the symbol used for sideline communication in the first time slot The value of is one of the set ⁇ 0,1,2,...,l-1 ⁇ , where, Minimum number of symbols used for sidelink communication in a slot The value of is one of the sets ⁇ 1, 2, 3,..., 14 ⁇ ; when the number of symbols in a time slot is 14, the number of symbols used for sideline communication The value of the set is one of the.
  • the index of the starting position of the symbol used for sideline communication in the first time slot is used.
  • Minimum number of symbols used for sidelink communication in a slot Number of symbols used for sideline communication The description is given by way of example, but is not limited to this example.
  • the first configuration information also includes Indicates the number of candidate resources in the first slot. or, It may also be a value determined by the first terminal device and/or the second terminal device, a value preconfigured in the first terminal device and/or the second terminal device, or a standard predefined value.
  • the number of candidate resources in the first time slot Indicates satisfaction:
  • the number of candidate resources in the first slot It can be indicated by the first configuration information, and its value is a set one of; or, the number of candidate resources in the first slot Can be a value predefined by the standard, such as 2 or 3.
  • the number of candidate resources in the first slot satisfies:
  • the maximum value of not more than The first configuration information may indicate value of .
  • k represents the minimum number of symbols required to transmit AGC information, PSCCH and PSSCH in one time slot, and refers to the minimum number of symbols that can be used to transmit AGC information, PSCCH and PSSCH in a time slot, and can be used for transmission
  • the symbols of AGC information, PSCCH and PSSCH do not include space symbols.
  • the first configuration information may further indicate the number of first symbols and/or the number of second symbols in the candidate resource.
  • the number of first symbols and/or the number of second symbols in the candidate resource may be a value determined by the first terminal device and/or the second terminal device, pre-configured in the first terminal device and/or the second terminal device. The value in the end device or a standard predefined value. For example, as shown in FIG. 8 , the number of first symbols in the standard predefined candidate resource is 1, and the first configuration information indicates that the number of second symbols is 2.
  • the first terminal device and/or the second terminal device may determine candidate resources according to the first configuration information, and perform sidelink communication according to the candidate resources.
  • the first symbol in any candidate resource can be used for sending the first information, so even if the channel access time of the first terminal device is located after the start time of the first symbol in a candidate resource of the first time slot, the A terminal device can also send the first information according to the first symbols of other candidate resources after the channel access time without waiting for the next time slot of the first time slot, thereby reducing the sidelink communication delay.
  • the embodiment of the present application further provides a communication method, wherein the first terminal device sends the first information in the first symbol of the first candidate resource after the channel access time in the first time slot, and sends the first information in the first candidate resource in the first time slot.
  • the second symbol of SCI sends SCI for scheduling sideline data.
  • the second terminal device may decode the SCI according to the first information in the first candidate resource, and perform sidelink data decoding according to the SCI, so as to implement sidelink communication.
  • the method shown in FIG. 9 may be performed independently of the process shown in FIG. 7 or after the process shown in FIG. 7 . In other words, the execution of the process shown in FIG. 9 does not necessarily depend on the configuration process of the first configuration information shown in FIG. 7 .
  • the communication method includes the following steps:
  • the first terminal device sends the first information in the first symbol of the first candidate resource, and sends the SCI in the second symbol of the first candidate resource.
  • the first candidate resource is the first candidate resource among the candidate resources after the first time.
  • the first time is the channel access time of the first terminal device. It should be understood that the first candidate resource is located in the first time slot.
  • the first terminal device may determine the position of the first symbol and/or the second symbol according to the first configuration information from the network device. Alternatively, the first symbol and/or the second symbol may be preconfigured at the first terminal device or standard-defined. In the process shown in FIG. 9 , reference may be made to the description in FIG. 7 for candidate resources, and the description will not be repeated here.
  • the first candidate resource may be the first candidate resource whose start time is after the first time.
  • the first time may be the time when the back-off value K is reduced to 0 when the first terminal device performs LBT.
  • the first time is the time when the first terminal device wakes up from the power saving state and performs SL communication.
  • the first moment may be the moment when the first terminal device accesses the network to send the SL information.
  • the first terminal device may send the third information on the first resource following the second symbol of the first candidate resource.
  • the third information may include sideline data and/or sideline feedback information, or the third information is carried on the PSSCH, or the first resource in this application may be used to transmit the PSSCH.
  • the first resource may include the first symbol and/or the second symbol following the second symbol.
  • the PSCCH resource and the PSSCH resource allocated to the first terminal device can be frequency-division multiplexed
  • the first resource includes the second symbol and the first symbol and/or the second symbol following the second symbol.
  • the PSCCH resource includes the second symbol of the first candidate resource
  • the second symbol of the first candidate resource can be multiplexed into the PSSCH resource, that is, the second symbol of the first candidate resource and the first candidate resource.
  • the first symbol and/or the second symbol after the second symbol in can be used to transmit the PSSCH.
  • the first resource may include the first symbol and/or the second symbol in the candidate resources located after the first candidate resource.
  • the first resource includes part or all of the symbols in the first time slot that are located after the second symbol of the first candidate resource and may be used for sidelink communication, wherein the part or all of the symbols may include at least one candidate resource The first and second symbols of .
  • the first terminal device may send the first information in this symbol #6.
  • Symbol #7 and symbol 8 are the second symbols in candidate resource #3, then the SCI can be sent at symbol #7 and symbol 8. If the SCI is sent on symbols #7 and #8, and the resources of PSCCH and PSSCH allocated to the first terminal device can be frequency-division multiplexed, the first terminal device may also send sidelines on symbols #7 and #8 data.
  • the first terminal device may transmit the third information in symbols #7 to #12, that is, at this time, the first resource includes symbols #7 to symbol #12.
  • the first terminal device may send the second information before the first candidate resource, so as to prevent the channel already accessed from being occupied by other terminal devices.
  • the start time of the resource refers to the start time of the first symbol of the resource.
  • the first terminal device may determine whether to send the second information according to the position within the first time slot at the first moment. Specifically, when the first moment is not the start moment of any candidate resource in the first time slot, the second information is sent between the first moment and the start moment of the next candidate resource.
  • the second information may be the copy information of the first information, the copy information of the subset of the first information, the copy information of the SCI, the copy information of the subset of the SCI, other information or a demodulation reference signal (DMRS) ) and other reference signals, at least one of the extended cyclic prefix (extended cyclic prefix, ECP) of the first information, the ECP of the SCI, and other information such as set information.
  • DMRS demodulation reference signal
  • the first terminal device may send the second information between the first moment and the start moment of symbol #3. Specifically, the first terminal device may send the second information on the time domain resource located after the first moment in the symbol #1 and the symbol #2. Thereafter, the first terminal device may transmit the first information on symbol #3, and then transmit the SCI on symbol #4 and symbol #5, where symbols #4 and #5 are the second symbols of candidate resource #2, in this example Medium is the resource of PSCCH.
  • the first resource includes symbols #6 to #12, that is, symbols #6 to #12 can be used to send third information.
  • the PSCCH resources and PSSCH resources allocated to the first terminal device can be frequency-division multiplexed, that is, the symbol #4 and the symbol #5 can be multiplexed for transmitting the third information
  • the first terminal device can use the symbol #4 to transmit the third information.
  • the third information is sent from 4 to symbol #12, when the first resource includes symbols #4 to #12.
  • the first terminal device can only perform the first information, the SCI and the third information in the next time slot. of sending.
  • the first terminal device may send the second information on a symbol for sidelink communication that is located after the first moment in the first time slot.
  • the first terminal device may also transmit the first information on the first symbol of the first candidate resource in the next time slot and the SCI on the second symbol of the candidate resource.
  • S202 The second terminal device blindly decodes the SCI on the second symbol.
  • the second terminal device decodes the information carried on the second symbol in the first candidate resource according to the information carried on the first symbol in the first candidate resource to obtain the SCI. That is to say, the second time in this application refers to the time when the second terminal device obtains the SCI of the second symbol carried in the first candidate resource. After the second time instant, the second terminal device may decode the information carried on the resource following the second symbol according to the SCI.
  • the first candidate resource is, for the second terminal device, one of the candidate resources in the first time slot.
  • the second terminal device may determine the position of the first symbol and/or the second symbol of the candidate resource in the first time slot according to the first configuration information from the network device.
  • the first symbol and/or the second symbol of the candidate resource in the first time slot may be preconfigured at the second terminal device or defined by a standard.
  • the first terminal device uses the method shown in FIG. 9 to send the first information on the first symbol in the first candidate resource after the channel access time among the plurality of first symbols in the first time slot, and sends the first information on the channel
  • the SCI is sent on the second symbol of the first candidate resource after the access time to perform sidelink communication. Therefore, there is no need to wait for the next time slot to perform sidelink communication, which can reduce the time required for sidelink communication. extension.
  • the following is an example of the manner in which the second terminal device blindly detects the SCI and obtains the SCI at the second moment. It should be understood that the method for implementing the blind detection of SCI of the present application is not limited thereto.
  • the blind detection of SCI for any candidate resource includes: performing AGC according to the information carried by the first symbol in the candidate resource, obtaining the AGC result corresponding to the information, and performing the AGC result on the information carried by the second symbol in the same candidate resource of the candidate resource according to the AGC result. Decoding, if the decoding is successful, the SCI carried in the second symbol is obtained.
  • the second terminal device can determine The candidate resource is the first candidate resource, the information carried by the first symbol is the first information, that is, the AGC information, and the information carried by the second symbol is the SCI. If the decoding fails, it means that the candidate resource is not the first candidate resource, the information carried by the first symbol is not the first information, and the information carried by the second symbol is not the SCI. In other words, the second terminal device can determine that the candidate resource is not the first candidate resource.
  • the information carried by the first symbol is not the first information
  • the information carried by the second symbol is not the SCI
  • the second terminal device may continue to perform AGC adjustment and blind detection of the SCI on the next candidate resource in the first time slot.
  • the second terminal device may also perform the above actions on the candidate resource traversal in the first time slot according to the set interval and/or the set order.
  • the second terminal device before obtaining the SCI according to the first information, performs AGC on the information carried by the first symbol in each or at least two candidate resources received in the first time slot, and obtains the AGC result , AGC results can be used for SCI and/or sideline data reception.
  • the information of the first symbol of the i-th candidate resource carried in the first time slot is referred to as information
  • the information of the second symbol of the i-th candidate resource carried in the first time slot is referred to as information.
  • the second terminal device may perform AGC according to the information carried by the first symbol in the candidate resource during the blind detection of SCI on any candidate resource, obtain an AGC result, and perform blind detection of SCI according to the AGC result, and also It is to determine whether the SCI can be correctly decoded in the candidate resource according to the AGC result.
  • the second terminal device may perform blind detection of the SCI on the candidate resource #1. For example, the second terminal device receives the first symbol of the candidate resource #1, that is, symbol #0. information, according to Information to perform AGC, obtain The AGC result corresponding to the information, according to The AGC result corresponding to the information is received in the second symbol of candidate resource #1, namely symbol #1 and symbol #2 information, and then according to Information-blind detection of SCI.
  • the second terminal device may also perform blind detection of the SCI on the candidate resource #2, for example, the second terminal device may receive the first symbol of the candidate resource #2, that is, symbol #3 information, according to Information to perform AGC, obtain The AGC result corresponding to the information, according to The AGC result corresponding to the information is received in the second symbol of candidate resource #2, namely symbol #4 and symbol #5 information, and then according to Information-blind detection of SCI.
  • the second terminal device may also perform blind detection of the SCI on the candidate resource #3, for example, the second terminal device may receive the first symbol of the candidate resource #3, that is, symbol #6 information, according to Information to perform AGC, obtain The AGC result corresponding to the information, according to The AGC result corresponding to the information is received in the second symbol of candidate resource #3, namely symbol #7 and symbol #8 information, and then according to Information-blind detection of SCI.
  • the second terminal device has Decoding of the AGC result corresponding to the information information obtained SCI, you can stop based on Decoding of the AGC result corresponding to the information information.
  • the second terminal device has Decoding of the AGC result corresponding to the information Information obtained from SCI, or based on Decoding of the AGC result corresponding to the information information obtained SCI, you can stop based on Decoding of the AGC result corresponding to the information information.
  • the first terminal device sends the first information in the first symbol of the candidate resource #3, that is, symbol #6, and sends the SCI in the second symbol of the candidate resource #3, that is, symbol #7 and symbol #8, because the second terminal There is a delay in the decoding of the device, and the second moment when the second terminal device obtains the SCI may be located after the candidate resource #3. After obtaining the SCI according to the blind detection of the candidate resource #3 at the second moment, the second terminal device may determine that the candidate resource #3 is the first candidate resource.
  • the second terminal device may decode the side row data in the first time slot according to the AGC result capable of correctly decoding the SCI and the correctly received SCI.
  • the second terminal device since the second terminal device needs to The AGC result corresponding to the information receives the second symbol carried in the i-th candidate resource.
  • information which is used to blindly detect SCI, so the second terminal device is identified based on whether the SCI can be correctly decoded Whether the information is SCI and identification Whether the information is the first information.
  • the decoding of the information requires a certain decoding delay. If the second terminal device recognizes the first symbol carried in the p-th candidate resource The information is the first information and the first information identifying the second symbol carried on the p-th candidate resource.
  • the information is SCI, which means that the p-th candidate resource is the first candidate resource, and the candidate resources after the p-th candidate resource may transmit third information, such as sideline data and/or sideline feedback information, where , is the number of candidate resources in the first time slot.
  • the second terminal device cannot delete any information carried on the resources after the p-th candidate resource, otherwise, packet loss in sideline transmission will result, and transmission reliability will be reduced.
  • the second terminal device may store the information carried on the first symbol and the second symbol in all candidate resources except the first candidate resource received before the second moment for use in For data decoding, and/or, the second terminal device may store the data of the first symbol carried on the jth candidate resource received before the second time instant.
  • the information carried on the first symbol and the second symbol in all candidate resources except the first candidate resource may be referred to as fourth information, and/or the second terminal device at the second moment previously received information and The information is called fourth information.
  • the fourth information includes the information carried on the first symbol and the second symbol in all the candidate resources except the first candidate resource, and/or, the information carried by the second terminal device received before the second moment is carried on the of the first symbol of the i-th candidate resource information and the second symbol carried in the ith candidate resource information.
  • the second terminal device can store the information after receiving the first symbol carried in the second candidate resource Before or at the time of the message, if the SCI has not been correctly decoded by the second terminal device, the After the information, the second terminal device can store the information.
  • the start symbol of the first candidate resource is the start symbol that can be used for sideline transmission in the first time slot
  • the first information can only be sent on this symbol at the earliest. That is, the sideline data information will not be sent on this symbol, so for the second terminal device, it is not necessary to store the information of the start symbol that can be used for sideline transmission in the first time slot, that is, it is not necessary to store the information of the start symbol of the sideline transmission in the first time slot. at the first symbol of the first candidate resource information and the second symbol carried in the first candidate resource information.
  • FIG. 12 takes FIG. 12 as an example to describe the actions performed by the second terminal device in detail.
  • the first terminal device transmits the first information at the first symbol of the candidate resource #2, namely symbol #3, transmits the SCI at the second symbol of the candidate resource #2, namely symbol #4 and symbol #5, and transmits the first information at the first symbol #4 and symbol #5 of the candidate resource #2.
  • Symbols #6 to #12 used for sideline communication in the time slot transmit sideline data that is, the first resource includes symbols #6 to #12. Among them, a certain time in the symbol #1 is time t1.
  • the second terminal device based on the first symbol in the first time slot available for sidestream communication Information to perform AGC, obtain The AGC result corresponding to the information, wherein the first symbol available for sideline communication is symbol #0, and symbol #0 is also the first symbol in candidate resource #1. And, the second terminal device according to The AGC result corresponding to the information, for the second symbol in the candidate resource #1, that is, the symbol #1 and the symbol #2 received.
  • information to decode due to the decoding delay, the second terminal device cannot receive the information is completed immediately after the The decoding of the information, that is, the second terminal device cannot complete the pairing at the end of symbol #2 or the beginning of symbol #3.
  • the decoding of the information it is not known whether the SCI can be obtained.
  • the second terminal device finishes decoding information can be received according to the first symbol in candidate resource #2, symbol #3 information is processed by AGC to determine the information corresponding to the AGC results, and/or store the information. After that, the second terminal device can The AGC result corresponding to the information is received on the second symbol in candidate resource #2, namely symbol #4 and symbol #5. information to decode.
  • the second terminal device if at time t1, the second terminal device has not received the The AGC result corresponding to the information is correctly decoded in the second symbol received in the i-th candidate resource.
  • the second terminal device The AGC result corresponding to the message is correctly decoded and received on symbol #4 and symbol #5
  • the information obtains the SCI, that is, time t1+k is the second time, and after time t1+k, the second terminal device can decode the sideline data information scheduled by the SCI according to the SCI.
  • t1+k >t1.
  • the PSCCH resources allocated to the first terminal device and the PSSCH resources can be frequency-division multiplexed
  • the second terminal device can perform frequency division multiplexing on the symbols #4 and symbols used for sidelink communication after symbol #4.
  • the received sideline data information is decoded, wherein the symbols used for sidelink communication after symbol #4 and symbol #4 include the data stored by the second terminal device. information; otherwise, if the PSCCH resources allocated to the first terminal device and the PSSCH resources cannot be frequency-division multiplexed, the second terminal device may The sideline data information received on the symbol is decoded, wherein the information received on the symbols used for sidelink communication after symbol #6 and symbol #6 includes the information stored in the second terminal device. information.
  • the second terminal device stops performing blind detection of AGC and SCI on the candidate resources in the first time slot to save processing overhead. For example, as shown in FIG. 12 , after time t1+k, even if the first time slot still includes candidate resources, the second terminal device will no longer be based on the first symbol of the candidate resource after time t1+k in the first time slot. AGC is performed on the information carried, and blind detection of SCI is no longer performed according to the second symbol of the candidate resource after time t1+k in the first time slot.
  • the second terminal device will only send the first information in the slot x Perform AGC on the first symbol of the first candidate resource on x, and perform PSCCH decoding on the information received on the second symbol of the first candidate resource according to the AGC result.
  • the PSCCH decoding of the second terminal device fails at this time, the PSCCH decoding will not be performed on the second symbols of other candidate resources of the slotx.
  • AGC processing will not be performed on the first symbols of other candidate resources of the slot x.
  • Embodiments of the present application provide a communication device.
  • the communication apparatus may be used to implement the first terminal apparatus involved in the foregoing embodiments, and the communication apparatus may include the structure shown in FIG. 5 and/or FIG. 6 .
  • the communication device may be configured to perform the steps performed by the first terminal device in the above method embodiments.
  • Embodiments of the present application provide a communication device.
  • the communication apparatus may be used to implement the second terminal apparatus involved in the foregoing embodiments, and the communication apparatus may include the structure shown in FIG. 5 and/or FIG. 6 .
  • the communication device may be configured to perform the steps performed by the second terminal device in the above method embodiments.
  • Embodiments of the present application provide a communication device.
  • the communication apparatus may be used to implement the network equipment involved in the foregoing embodiments, and the communication apparatus may include the structures shown in FIG. 5 and/or FIG. 6 .
  • the communication apparatus can be used to perform the steps performed by the network device in the above method embodiments.
  • Embodiments of the present application provide a communication system.
  • the communication system may include the first terminal device, the second terminal device, and the network equipment involved in the foregoing embodiments, for implementing the method shown in FIG. 7 .
  • the communication system may include the first terminal device and the second terminal device involved in the foregoing embodiments, for implementing the method shown in FIG. 9 .
  • Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a computer, the computer can implement any of the embodiments shown in the foregoing method embodiments. Processes related to the first terminal device, the second terminal device and/or the network device.
  • Embodiments of the present application further provide a computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the same method as the first one in any of the foregoing method embodiments. Processes related to the terminal device, the second terminal device and/or the network device.
  • An embodiment of the present application further provides a chip or a chip system, where the chip may include a processor, and the processor may be configured to call a program or an instruction in a memory to execute any one of the foregoing method embodiments and the first Processes related to the terminal device, the second terminal device and/or the network device.
  • the chip system may include the chip and other components such as memory or transceivers.
  • An embodiment of the present application further provides a circuit, which can be coupled with a memory and can be used to execute the first terminal device, the second terminal device, and/or the network device in any of the embodiments shown in the foregoing method embodiments. process.
  • the chip system may include the chip and other components such as memory or transceivers.
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application. implementation constitutes any limitation.
  • the term "and/or” in this application is only an association relationship to describe associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time. , there are three cases of B alone.
  • the character "/" in this document generally indicates that the contextual object is an "or” relationship; the term “at least one” in this application can mean “one” and "two or more", for example, A At least one of , B, and C can mean: A alone exists, B exists alone, C exists alone, A and B exist simultaneously, A and C exist simultaneously, C and B exist simultaneously, and A and B and C exist simultaneously. seven situations.
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. 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, and the like, having computer-usable program code embodied therein.
  • 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 function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

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Abstract

本申请公开了一种通信方法、终端装置及系统，使得第一终端装置和第二终端装置可根据第一配置信息确定时隙内的多个候选资源，并根据候选资源进行侧行链路通信。其中，一个时隙内的任意候选资源中的第一符号都可以用于第一信息的发送，因此即便第一终端装置的信道接入时刻位于第一时隙的一个候选资源中的第一符号的起始时刻之后，第一终端装置还可根据信道接入时刻之后的其他候选资源的第一符号进行第一信息的发送，而不必等待第一时隙的下一个时隙，因此可以降低侧行链路通信时延。

Description

一种通信方法、终端装置及系统 技术领域
本申请涉及无线通信技术领域，特别涉及一种通信方法、终端装置及系统。
背景技术
终端装置和终端装置直接通信可以称为侧行通信，在侧行通信过程中，作为发送端的终端设备可以通过侧行链路(sidelink，SL)向作为接收端的终端设备发送侧行链路控制信息(sidelink control information，SCI)、侧行数据、反馈信息和参考信号等至少一种SL信息。其中，接收端终端设备通过接收SCI来接收和译码该侧行数据。SCI承载于物理层侧行链路控制信道(physical sidelink control channel，PSCCH)，侧行数据可承载于物理层侧行链路共享信道(physical sidelink shared channel，PSSCH)。接收端只有在正确译码承载于PSCCH的SCI后才能译码承载于PSSCH的侧行数据。
另外，由于侧行通信通常是分布式系统，终端装置需要进行自动增益控制(automatic gain control，AGC)处理，用于使接收端终端装置将接收信号的强度调整为准确译码所需的强度。AGC机制要求发送端终端装置在时隙的起始符号，例如，时隙中的用于侧行链路通信的第一个符号，发送AGC信息，接收端终端装置根据AGC信息执行AGC才能正确接收SCI，以及根据SCI进行侧行数据的接收。
综上，由于AGC信息在一个时隙中的位置固定为用于侧行链路通信的起始符号，当终端装置在一个时隙中的用于侧行链路通信的起始符号之后接入信道，则终端装置只能等待下一个时隙才能进行侧行链路通信，造成侧行链路通信时延增加。
发明内容
本申请提供一种通信方法、终端装置及系统，用于降低侧行链路通信的时延。
第一方面，本申请实施例提供一种通信方法，该方法可以由第一终端装置和/或第二终端装置执行。第一终端装置和/或第二终端装置可以是终端或终端中的部件比如处理器、芯片或芯片系统等。第一终端装置和第二终端装置支持侧行链路通信。
根据该方法，第一终端装置和/或第二终端装置可获取第一配置信息，并根据第一配置信息确定第一时隙中的连续的至少两个候选资源。其中，候选资源包括连续的多个符号，该多个符号包括至少一个第一符号和至少一个第二符号。该第一符号用于传输第一信息，该第二符号用于传输侧行链路控制信息，第一符号在第二符号之前。
采用第一方面所示方法，第一终端装置和/或第二终端装置可根据第一配置信息确定候选资源，并根据候选资源进行侧行链路通信。由于任意候选资源中的第一符号都可以用于第一信息的发送，因此即便第一终端装置的信道接入时刻位于第一时隙的一个候选资源中的第一符号的起始时刻之后，第一终端装置还可根据信道接入时刻之后的其他候选资源的第一符号进行第一信息的发送，而不必等待第一时隙的下一个时隙，因此可以降低侧行链路通信时延。
在一种可能的设计中，所述第一配置信息包括候选资源中连续的第二符号的个数信息。
在一种可能的设计中，第一终端装置还可在第一候选资源的第一符号发送第一信息， 以及在第一候选资源的第二符号发送侧行链路控制信息，第一候选资源是第一时刻之后的候选资源中的第一个候选资源，第一时刻是第一终端装置的信道接入时刻，第一时刻在所述第一时隙内。
在一种可能的设计中，若第一时刻在第一候选资源的起始时刻之前，则第一终端装置还可在第一时刻至第一候选资源的起始时刻之间发送第二信息。采用该设计，可以避免第一终端装置已经接入的信道被其他终端装置占用，进一步降低传输时延。
在一种可能的设计中，第二信息包括第一信息的复制信息、侧链路控制信息的复制信息、第一信息的扩展循环前缀或侧链路控制信息的扩展循环前缀。
在一种可能的设计中，第一终端装置还可在第一资源上发送第三信息，第一资源包括第一候选资源之后的第一符号和/或第二符号，第三信息承载于侧行链路数据信道中。
在一种可能的设计中，第二终端装置可以在第二符号上盲检测侧行链路控制信息。
在一种可能的设计中，在第二时刻之后，第二终端装置可停止在所述第一时隙中的候选资源上盲检测侧行链路控制信息，以降低处理开销。该第二时刻为第二终端装置获得第一候选资源中的第二符号所承载的侧行链路控制信息的时刻，第一候选资源为候选资源中的一个。
在一种可能的设计中，第二终端装置可以根据在第二时刻之前的候选资源中的第i个候选资源的第一符号上承载的信息，进行自动增益控制调整，其中，i＝1、2……n，n为第一时隙中位于第二时刻之前的所述候选资源的数量，第二时刻为第二终端装置获得第一候选资源中的第二符号所承载的侧行链路控制信息的时刻，第一候选资源为候选资源中的一个。第二终端装置还可根据自动增益控制调整的结果译码第i个候选资源的第二符号上承载的信息。
在一种可能的设计中，第二终端装置还可存储至少一个第四信息，第四信息为第二时刻之前在候选资源中的第j个候选资源的第一符号和所述第二符号上承载的信息，以提高传输可靠性。其中，j＝2、3……n，n为第一时隙中位于第二时刻之前的候选资源的数量，第二时刻为第二终端装置获得第一候选资源中的第二符号所承载的侧行链路控制信息的时刻，第一候选资源为候选资源中的一个。
在一种可能的设计中，第二通信装置还可根据所述侧行链路控制信息，译码第一候选资源之后的第四信息和最后一个第四信息之后的信息。
第二方面，本申请实施例提供一种通信方法，该方法可以由网络设备或网络设备中的部件比如处理器、芯片或芯片系统等执行。可选的，该网络设备支持为侧行链路通信配置通信资源。下面以网络设备为执行主体为例进行说明。
根据该方法，网络设备可确定第一配置信息，该第一配置信息用于指示第一时隙中的至少两个候选资源，该候选资源包括连续的多个符号，该多个符号包括至少一个第一符号和至少一个第二符号，该第一符号用于传输第一信息，该第二符号用于传输侧行链路控制信息，该第一符号在该第二符号之前。网络设备还可用于发送第一配置信息。
在一种可能的设计中，该第一配置信息包括候选资源中连续的第二符号的个数信息。
第三方面，本申请实施例提供一种通信方法，该方法可以由第一终端装置执行。该第一通信装置可参照第一方面中的说明。
根据该方法，第一终端装置可在第一候选资源的第一符号发送第一信息，以及在第一候选资源的第二符号发送侧行链路控制信息，第一候选资源是第一时刻之后的候选资源中 的第一个候选资源，第一时刻是第一终端装置的信道接入时刻，第一时刻在所述第一时隙内。
在一种可能的设计中，若第一时刻在第一候选资源的起始时刻之前，则第一终端装置还可在第一时刻至第一候选资源的起始时刻之间发送第二信息。采用该设计，可以避免第一终端装置已经接入的信道被其他终端装置占用，进一步降低传输时延。
在一种可能的设计中，第二信息包括第一信息的复制信息、侧链路控制信息的复制信息、第一信息的扩展循环前缀或侧链路控制信息的扩展循环前缀。
在一种可能的设计中，第一终端装置还可在第一资源上发送第三信息，第一资源包括第一候选资源之后的第一符号和/或第二符号，第三信息承载于侧行链路数据信道中。
第三方面中所涉及的候选资源、第一符号和/或第二符号可参照第一方面中的说明。
第四方面，本申请实施例提供一种通信方法，该方法可以由第二终端装置执行。该第二通信装置可参照第一方面中的说明。
根据该方法，第二终端装置可以在第二符号上盲检测侧行链路控制信息。
在一种可能的设计中，在第二时刻之后，第二终端装置可停止在所述第一时隙中的候选资源上盲检测侧行链路控制信息。该第二时刻为第二终端装置获得第一候选资源中的第二符号所承载的侧行链路控制信息的时刻，第一候选资源为候选资源中的一个。
在一种可能的设计中，第二终端装置可以根据在第二时刻之前的候选资源中的第i个候选资源的第一符号上承载的信息，进行自动增益控制调整，其中，i＝1、2……n，n为第一时隙中位于第二时刻之前的所述候选资源的数量，第二时刻为第二终端装置获得第一候选资源中的第二符号所承载的侧行链路控制信息的时刻，第一候选资源为候选资源中的一个。第二终端装置还可根据自动增益控制调整的结果译码第i个候选资源的第二符号上承载的信息。
在一种可能的设计中，第二终端装置还可存储至少一个第四信息，第四信息为第二时刻之前在候选资源中的第j个候选资源的第一符号和所述第二符号上承载的信息。其中，j＝2、3……n，n为第一时隙中位于第二时刻之前的候选资源的数量，第二时刻为第二终端装置获得第一候选资源中的第二符号所承载的侧行链路控制信息的时刻，第一候选资源为候选资源中的一个。
在一种可能的设计中，第二通信装置还可根据所述侧行链路控制信息，译码第一候选资源之后的第四信息和最后一个第四信息之后的信息。
第四方面中所涉及的候选资源、第一符号和/或第二符号可参照第一方面中的说明。
第五方面，本申请实施例提供一种通信装置，可以实现上述第一方面或其任一可能的设计中由第一通信装置和/或第二通信装置实现的方法。该装置包括用于执行上述方法的相应的模块或单元或部件。该装置包括的模块可以通过软件和/或硬件方式实现。该装置例如可以为第一通信装置和/或第二通信装置，或者为可支持第一通信装置和/或第二通信装置实现上述方法的部件或基带芯片、芯片系统、或处理器等。
示例性的，该通信装置可包括收发模块或通信模块，和处理模块或处理单元等等模块化组件，这些模块可以执行上述第一方面或其任一可能的设计中第一通信装置和/或第二通信装置的相应功能。当通信装置是第一通信装置和/或第二通信装置时，收发模块可以是发送器或接收器，或发送器和接收器整合获得的收发器；收发模块可以是发送模块或接收模块，或发送模块和接收模块整合获得的。收发模块可以包括通信接口、天线和/或射频电路 等，处理模块可以是处理器，例如基带芯片等。当通信装置是具有上述第一通信装置和/或第二通信装置功能的部件时，收发模块可以是射频模块或通信接口，处理模块可以是处理器。当通信装置是芯片系统时，收发模块可以是芯片系统的输入输出接口、处理模块可以是芯片系统的处理器，例如：中央处理单元(central processing unit，CPU)。
可选的，当该通信装置通过软件化模块实现时，通信装置可包括收发模块和/或处理模块。当该通信装置通过硬件化组件实现时，通信装置可包括收发器和/或处理器。
收发模块或收发器可用于执行第一方面或其任一可能的设计中由第一通信装置和/或第二通信装置执行的接收和/或发送的动作。处理模块或处理器可用于执行第一方面或其任一可能的设计中由第一通信装置和/或第二通信装置执行的接收和发送以外的动作。
当该通信装置包括收发模块和处理模块时，收发模块可用于获取第一配置信息，处理模块可用于根据第一配置信息确定第一时隙中的连续的至少两个候选资源。
在一种可能的设计中，收发模块还可用于在第一候选资源的第一符号发送第一信息，以及在第一候选资源的第二符号发送侧行链路控制信息。第一信息和侧行链路控制信息可参照第一方面中的描述。
在一种可能的设计中，若第一时刻在第一候选资源的起始时刻之前，则收发模块还可用于在第一时刻至第一候选资源的起始时刻之间发送第二信息。第一候选资源、第一时刻和第二信息可参见第一方面中的说明。
在一种可能的设计中，收发模块还可用于在第一资源上发送第三信息，第一资源和第三信息可参照第一方面中的说明。
在一种可能的设计中，收发模块可用于在第二符号上盲检测侧行链路控制信息。
在一种可能的设计中，在第二时刻之后，收发模块可停止在所述第一时隙中的候选资源上盲检测侧行链路控制信息。第二时刻可参照第一方面中的说明。
在一种可能的设计中，收发模块还可用于根据在第二时刻之前的候选资源中的第i个候选资源的第一符号上承载的信息，进行自动增益控制调整，并根据自动增益控制调整的结果译码第i个候选资源的第二符号上承载的信息。i可参照第一方面中的说明。
在一种可能的设计中，处理模块可用于存储至少一个第四信息。第四信息可参照第一方面中的说明。
在一种可能的设计中，收发模块还可用于根据所述侧行链路控制信息，译码第一候选资源之后的第四信息和最后一个第四信息之后的信息。
第六方面，本申请实施例提供一种通信装置，可以实现上述第二方面或其任一可能的设计中由网络设备实现的方法。该装置包括用于执行上述方法的相应的模块或单元或部件。该装置包括的模块可以通过软件和/或硬件方式实现。该装置例如可以为网络设备，或者为可支持网络设备实现上述方法的部件或基带芯片、芯片系统、或处理器等。
示例性的，该通信装置可包括收发模块或通信模块，和处理模块或处理单元等等模块化组件，这些模块可以执行上述第二方面或其任一可能的设计中网络设备的相应功能。当通信装置是网络设备时，收发模块可以是发送器或接收器，或发送器和接收器整合获得的收发器；收发模块可以是发送模块或接收模块，或发送模块和接收模块整合获得的。收发模块可以包括通信接口、天线和/或射频电路等，处理模块可以是处理器，例如基带芯片等。当通信装置是具有上述网络设备功能的部件时，收发模块可以是射频模块或通信接口，处 理模块可以是处理器。当通信装置是芯片系统时，收发模块可以是芯片系统的输入输出接口、处理模块可以是芯片系统的处理器，例如：中央处理单元。
可选的，当该通信装置通过软件化模块实现时，通信装置可包括收发模块和/或处理模块。当该通信装置通过硬件化组件实现时，通信装置可包括收发器和/或处理器。
收发模块或收发器可用于执行第二方面或其任一可能的设计中由网络设备执行的接收和/或发送的动作。处理模块或处理器可用于执行第二方面或其任一可能的设计中由网络设备执行的接收和发送以外的动作。
当该通信装置包括收发模块和处理模块时，处理模块可用于确定第一配置信息，发送模块可用于发送第一配置信息。第一配置信息可参照第一方面中的说明。
第七方面，本申请实施例提供一种通信装置，可以实现上述第三方面或其任一可能的设计中由第一通信装置实现的方法。该装置包括用于执行上述方法的相应的模块或单元或部件。该装置包括的模块可以通过软件和/或硬件方式实现。该装置例如可以为第一通信装置，或者为可支持第一通信装置实现上述方法的部件或基带芯片、芯片系统、或处理器等。
示例性的，该通信装置可包括收发模块或通信模块，和处理模块或处理单元等等模块化组件，这些模块可以执行上述第三方面或其任一可能的设计中第一通信装置的相应功能。当通信装置是第一通信装置时，收发模块可以是发送器或接收器，或发送器和接收器整合获得的收发器；收发模块可以是发送模块或接收模块，或发送模块和接收模块整合获得的。收发模块可以包括通信接口、天线和/或射频电路等，处理模块可以是处理器，例如基带芯片等。当通信装置是具有上述第一通信装置功能的部件时，收发模块可以是射频模块或通信接口，处理模块可以是处理器。当通信装置是芯片系统时，收发模块可以是芯片系统的输入输出接口、处理模块可以是芯片系统的处理器，例如：中央处理单元。
可选的，当该通信装置通过软件化模块实现时，通信装置可包括收发模块和/或处理模块。当该通信装置通过硬件化组件实现时，通信装置可包括收发器和/或处理器。
收发模块或收发器可用于执行第三方面或其任一可能的设计中由第一通信装置执行的接收和/或发送的动作。处理模块或处理器可用于执行第三方面或其任一可能的设计中由第一通信装置执行的接收和发送以外的动作。
当该通信装置包括收发模块和处理模块时，收发模块可用于在第一候选资源的第一符号发送第一信息，以及在第一候选资源的第二符号发送侧行链路控制信息。第一信息和侧行链路控制信息可参照第一方面中的描述。
在一种可能的设计中，若第一时刻在第一候选资源的起始时刻之前，则收发模块还可用于在第一时刻至第一候选资源的起始时刻之间发送第二信息。第一候选资源、第一时刻和第二信息可参见第一方面中的说明。
在一种可能的设计中，收发模块还可用于在第一资源上发送第三信息，第一资源和第三信息可参照第一方面中的说明。
第八方面，本申请实施例提供一种通信装置，可以实现上述第四方面或其任一可能的设计中由第二通信装置实现的方法。该装置包括用于执行上述方法的相应的模块或单元或部件。该装置包括的模块可以通过软件和/或硬件方式实现。该装置例如可以为第二通信装置，或者为可支持第二通信装置实现上述方法的部件或基带芯片、芯片系统、或处理器等。
示例性的，该通信装置可包括收发模块或通信模块，和处理模块或处理单元等等模块化组件，这些模块可以执行上述第四方面或其任一可能的设计中第二通信装置的相应功能。当通信装置是第二通信装置时，收发模块可以是发送器或接收器，或发送器和接收器整合获得的收发器；收发模块可以是发送模块或接收模块，或发送模块和接收模块整合获得的。收发模块可以包括通信接口、天线和/或射频电路等，处理模块可以是处理器，例如基带芯片等。当通信装置是具有上述第二通信装置功能的部件时，收发模块可以是射频模块或通信接口，处理模块可以是处理器。当通信装置是芯片系统时，收发模块可以是芯片系统的输入输出接口、处理模块可以是芯片系统的处理器，例如：中央处理单元。
可选的，当该通信装置通过软件化模块实现时，通信装置可包括收发模块和/或处理模块。当该通信装置通过硬件化组件实现时，通信装置可包括收发器和/或处理器。
收发模块或收发器可用于执行第四方面或其任一可能的设计中由第二通信装置执行的接收和/或发送的动作。处理模块或处理器可用于执行第四方面或其任一可能的设计中由第二通信装置执行的接收和发送以外的动作。
当该通信装置包括收发模块和处理模块时，收发模块可用于在第二符号上盲检测侧行链路控制信息。
在一种可能的设计中，在第二时刻之后，收发模块可停止在所述第一时隙中的候选资源上盲检测侧行链路控制信息。第二时刻可参照第一方面中的说明。
在一种可能的设计中，收发模块还可用于根据在第二时刻之前的候选资源中的第i个候选资源的第一符号上承载的信息，进行自动增益控制调整，并根据自动增益控制调整的结果译码第i个候选资源的第二符号上承载的信息。i可参照第一方面中的说明。
在一种可能的设计中，处理模块可用于存储至少一个第四信息。第四信息可参照第一方面中的说明。
在一种可能的设计中，收发模块还可用于根据所述侧行链路控制信息，译码第一候选资源之后的第四信息和最后一个第四信息之后的信息。
第九方面，提供一种通信系统，该通信系统包括第五方面至第六方面中所示的通信装置，即包括用于执行第一方面所示方法的第一通信装置和/或第二通信装置，以及包括用于执行第二方面所示方法的网络设备。或者，该通信系统可包括第七方面至第八方面所示的通信装置，即包括用于执行第三方面所示方法的第一通信装置，禾本科用于执行第四方面所示方法的第二通信装置。
第十方面，提供一种计算机可读存储介质，该计算机可读存储介质用于存储计算机指令，当该计算机指令在计算机上运行时，使得该计算机执行上述第一方面至第四方面或其任意一种可能的实施方式中所示的方法。
第十一方面，提供一种包含指令的计算机程序产品，该计算机程序产品用于存储计算机指令，当该计算机指令在计算机上运行时，使得该计算机执行上述第一方面至第四方面或其任意一种可能的实施方式中所示的方法。
第十二方面，提供一种电路，该电路与存储器耦合，该电路被用于执行上述第一方面至第四方面或其任意一种可能的实施方式中所示的方法。该电路可包括芯片和/或芯片电路。
以上第二方面至第十二方面及任一可能的设计的有益效果可参见前述第一方面及其可能的设计的有益效果。
附图说明
图1为本申请实施例提供的侧行链路通信的场景示例图；
图2为本申请实施例提供的侧行链路通信的网络覆盖情况示意图；
图3为本申请实施例提供的物理时隙与逻辑时隙对照示意图；
图4为本申请实施例提供的AGC位置的示意图；
图5为本申请实施例提供的一种通信装置的示意图；
图6为本申请实施例提供的另一种通信装置的示意图；
图7为本申请实施例提供的一种方法的流程示意图；
图8为本申请实施例提供的一种候选资源的结构示意图；
图9为本申请实施例提供的另一种方法的流程示意图；
图10为本申请实施例提供的一种终端装置进行发送的资源示意图；
图11为本申请实施例提供的另一种终端装置进行发送的资源示意图；
图12为本申请实施例提供的另一种终端装置进行发送的资源示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)终端装置，例如是终端设备，或者是用于实现终端设备的功能的模块，例如芯片系统，该芯片系统可以设置在终端设备中。终端设备包括向用户提供数据连通性的设备，具体的，包括向用户提供数据连通性的设备，或包括向用户提供数据连通性的设备。例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换数据，或与核心网交互语音和数据。该终端设备可以包括用户设备(user equipment，UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device，D2D)终端设备、车与任何事物(vehicle to everything，V2X)通信终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端设备、物联网(internet of things，IoT)终端设备。最典型的，终端装置可以为车辆、船舶或飞行器等载具或终端型路边单元，或内置于车辆或路边单元的通信模块或芯片。
本申请实施例中，终端装置之间支持直接通信(PC5)接口通信，即支持通过侧行链路进行传输。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
而如上介绍的各种终端设备，如果位于车辆上，例如放置在车辆内或安装在车辆内，都可以认为是车载终端设备，车载终端设备例如也称为车载单元(on board unit，OBU)。
本申请实施例中，终端设备还可以包括中继(relay)。或者理解为，能够与基站进行数据通信的都可以看作终端设备。
可选的，还可将路侧单元(road side unit，RSU)视为终端装置。
下文中，可通过终端装置为例对于本申请实施例提供的通信方法进行说明。比如，侧行通信中进行侧行数据发送的一方可称为发送端终端装置，用于侧行数据接收的一方可称为接收端终端装置。为方便说明，后续将发送端终端装置称为第一终端装置，将接收端终端装置称为第二终端装置。
2)网络设备，例如包括接入网(access network，AN)设备，例如基站，可以是指接入网中在空口通过一个或多个小区与终端装置通信的设备，或者例如，一种V2X技术中的网络设备为路侧单元(road side unit，RSU)。RSU可以是支持V2X应用的固定基础设施实体，可以与支持V2X应用的其他实体交换消息。网络设备可以包括演进通用陆地无线接入网节点B(E-UTRAN Node B，eNB)、第五代移动通信技术(the 5th generation，5G)NR系统中的下一代节点B(next generation node B，gNB)，或者也可以包括云接入网(cloud radio access network，Cloud RAN)系统中的集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)，本申请实施例并不限定。
因为本申请实施例主要涉及接入网设备，因此在下文中，如无特殊说明，则所述的网络设备均是指接入网设备。下文中，可通过基站来代表网络设备和/或接入网设备。
本申请实施例中，用于实现网络设备的功能的装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统，该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
(3)侧行通信，在本申请中是指终端装置与终端装置之间通过侧行链路进行的通信。
下面以V2X通信为例对侧行通信进行说明。
V2X通信针对以车辆为代表的高速设备，是未来对通信时延要求非常高的场景下应用的基础技术和关键技术。V2X通信的应用领域包括智能汽车、自动驾驶和智能交通运输系统等。如图1所示，较为典型的V2X通信场景包括车与车的通信(vehicle to vehicle，V2V)、车与行人的通信(vehicle to pedestrian，V2P)、车与基础设施的通信(vehicle to infrastructure，V2I)或车与网络的通信(vehicle to network，V2N)。其中，对于V2V通信，第一终端装置和/或第二终端装置可以是车辆或位于车载中的车载终端装置等。对于V2P通信，第一终端装置和第二终端装置中，一方可以是车辆或位于车载中的车载终端装置等，另一方可以是移动终端、可穿戴设备等由行人随身携带的终端装置。对于V2P通信，第一终端装置和第二终端装置中，一方可以是车辆或位于车载中的车载终端装置等，另一方可以是RSU等基础设施。对于V2N通信，第一终端装置和第二终端装置中，一方可以是车辆或位于车载中的车载终端装置等，另一方可以是基站。
基于V2X通信，第一终端装置可将自身的位置、速度等状态信息，或转弯、并线或倒车等行驶意图信息，或由周期性或非周期性的事件触发的信息，作为侧行数据向周围的终端装置发送。同样地，该第一终端装置也可以接收来自于周围的其他终端装置的侧行数据。此外，该第一终端装置还可转发其接收到的其他终端装置的侧行数据。示例性的，侧行数 据和/或侧行反馈信息承载于PSSCH。侧行反馈信息可包括混合自动重传请求(hybrid automatic repeat request，HARQ)反馈信息，例如确认应答(acknowledge，ACK)或否定应答(negative acknowledge，NACK)，还可以包括信道状态指示(channel state information，CSI)反馈信息。
V2X通信可以支持有网络覆盖和无网络覆盖的通信场景。在如图2中编号a和b所示的第一终端装置有网络覆盖的场景下，第一终端装置通过V2X通信进行发送时的资源分配方式可以采取网络设备调度模式。例如，通过网络设备调度发送的终端装置进行侧行链路通信所采用的资源，该资源可称为授权资源或授权频段。在图2中编号c所示的第一终端装置无网络覆盖场景下，或虽然有网络覆盖但第一终端装置未采用网络设备调度模式的情况下，可由第一终端装置进行资源的自选，即从资源池中选择用于侧行链路通信的资源，该资源可称为非授权资源或非授权频段。应理解，本申请中的资源是指时频资源。
在网络覆盖范围下，终端装置可通过接收网络设备的系统消息块(system information block，SIB)、小区级(cell-specific)的无线资源控制(radio resource control，RRC)信令或者终端装置用户级(UE-specific)RRC信令获得SL资源池(resource pool)配置信息和/或SL带宽部分(bandwidth part，BWP)配置信息。终端装置也可以使用预配置的SL资源池配置信息或SL BWP配置信息，例如，在没有网络覆盖范围时。SL资源池配置信息包括资源池资源信息，资源池资源信息用于指示SL资源池。资源池是时频资源的集合用于UE之间进行侧行通信。资源池可以包括码域资源。资源池的资源用于包括终端装置发送和接收以下至少一种物理信道的资源，如PSCCH，PSSCH，PSDCH，PSFCH，PSBCH等，PSSCH所承载的业务类型可以包括单播、组播和/或广播通信类型。在SL资源池的时域上，包括一个或多个时间单元，时间单元可以为一个或若干个符号、一个或若干个时隙(slot)，一个或若干个微时隙(mini-slot)、一个或若干个子帧，或，一个或若干个帧等。一个或多个时间单元可以是在时间上连续的，也可以是离散的。应理解，在一个资源池内时域单元是逻辑上连续的。
如图3所示，时隙1至时隙8是时间上连续的时隙，称这种时隙为物理时隙(physical slot)。将物理时隙——时隙1，时隙3，时隙5和时隙8配置为属于一个资源池的时隙。因资源池所包含的时隙在时间上可以是不连续的，那么从该资源池的角度而言，物理时隙上的时隙1，时隙3，时隙5和时隙8对应为资源池中的时隙1’、时隙2’、时隙3’和时隙4’，那么。该资源池中包含的连续的时隙(即时隙1’、时隙2’、时隙3’和时隙4’)为从资源池的逻辑上讲是连续的时隙，称这种逻辑上连续但时间上不一定连续的时隙为逻辑时隙(logical slot)。在SL资源池的频域上，包括一个或多个频域单元，频域单元可以是一个资源元素(resource element，RE)，若干个RE，一个资源块(resource block，RB)、若干个RB、一个子信道(sub channel)、若干个子信道。子信道的大小，即表示一个子信道包括一个或多个在频域上连续的(continuous)或交错的(interlaced)的RB数量，可以是10、12、15、20、25或50等整数。交错的RB是离散的RB的其中一种方式。例如，一个子信道所包含的多个RB是交错的，指该子信道所包含的任意相邻的两个RB之间至少间隔一个不属于该子信道的RB。
SL资源池配置信息还可以包括PSCCH的配置信息，PSCCH的配置信息包括一个时隙中PSCCH所占用的符号的数量和一个子信道中PSCCH所占用的RB个数。SL BWP配置信息可以包括SL资源池信息，用于配置BWP内包括的资源池的个数。SL BWP配置信 息可以包括SL带宽信息，用于指示进行SL通信的带宽大小，例如指示SL带宽为20兆赫兹(MHz)。
SL BWP配置信息还可以包括SL的符号信息，用于指示一个时隙上起始的SL符号位置和所占用的连续的SL符号的个数。SL BWP配置信息还可以包括SL的子载波间隔和循环前缀信息，用于指示SL通信所使用的子载波间隔和循环前缀。循环前缀指示扩展循环前缀或正常循环前缀。在一种可能的配置中，SL BWP配置信息还可以包括SL资源池配置信息。本申请中，除非特殊说明时间单元的含义，均用时隙进行描述，但不限于时间单位只为时隙；除非特殊说明时频域单元的含义，均用子信道进行描述，但不限于频域单位只为子信道。
在非授权频段中，发射端终端装置按照竞争的方式接入信号，例如，按照欧洲电信标准化组织(european telecommunications standards institute，ETSI)定义的信道接入方式。竞争的接入方式主要包括基于负载的设备(load based equipment，LBE)和基于框架的设备(frame based equipment，FBE)。
对于非授权频段的接入，LBE和FBE均需要终端装置进行先听后说(listen before talk，LBT)。举例来说，在接入非授权频段时可采用基于能量的检测。基于能量的检测需要设定一个检测门限(energy detection threshold)，当终端装置检测到的信道能量超过检测门限时，判决为信道忙，则不允许接入信道。当检测的信道能量低于检测门限时，如果持续超过一段时间，如34微秒(μs)，则允许开始退避，退避窗的大小和业务优先级相关，优先级越高，退避窗越小。终端装置在退避窗中随机选择一个退避数值K进行退避。检测的能量低于检测门限的时长每持续9μs，则K值减1，直至退避数值K减至0，则允许接入信道进行通信，退避数值K减至0的时刻即终端装置接入信道的时刻。在退避数值K减至0的过程中，如果终端装置检测的能量高于检测门限时，则信道为繁忙，停止退避。直到再次持续34μs检测的能量低于检测门限时，恢复退避，即按照上一次停止退避时的退避数值恢复退避。
在本申请中，侧行通信资源(或简称为资源)指在用于侧行通信的资源池中的时频资源，发送终端装置可以在该资源上发送侧行链路信息。其中，在一个资源上可以承载PSCCH、PSSCH、物理侧行链路反馈信道(physical sidelink feedback channel，PSFCH)和解调参考信号(demodulation reference signal，DMRS)等参考信号中的一种或多种。侧行资源的时域调度单位可以为一个时隙，也可以为一个微时隙，频域调度单位可以为子信道(sub channel)，也可以为连续的(continuous)或交错的(interlaced)一个或多个RB。
如图4所示，PSCCH可能在每个时隙上的每个子信道中存在，即一个PSCCH的时域起始位置为每个时隙上的用于侧行链路通信的第二个符号的起始时刻。本申请中，符号可以是正交频分复用(orthogonal frequency division multiplexing，OFDM)符号(symbol)。PSCCH占用的连续的符号个数可由资源池配置信息确定，例如为1或2或3个符号等其他不超过14个符号的符号数量。PSCCH的频域起始位置为每个子信道中索引(index)最小的物理资源模块(physical resource block，PRB)，PSCCH占用的RB的数量可由SL资源池配置信息确定，例如为不超过子信道的大小的RB数量。
另外，在NR侧行链路通信中，在不同的时隙上，通过SL进行通信的第一终端装置和第二终端装置都可能不同，因此对于一个第二终端装置来说，其在不同时隙接收的SL通信的第一终端装置可能不同，或者说，其在不同时隙接收的SL通信的第一终端装置可 能位于不同的地理位置，因此存在远近效应，造成第二终端装置在不同时隙的接收信号强度可能在较宽的动态范围内变化，不可预测。如果侧行链路的接收信号强度不在第二终端装置适宜的强度范围内则可能导致第二终端装置无法准确译码侧行链路信息。侧行链路信息包括侧行发现信息、侧行控制信息、侧行数据信息、侧行反馈信息、侧行同步信息或者侧行导频信息等至少一种信息。
为了将第二终端装置的接收信号强度控制在合理的范围内，侧行链路通信引入AGC，或称AGC调整，即第二终端装置通过模拟或数字增益将接收链中的接收信号强度调整到适合最佳性能的特定期望功率，从而满足正确译码所需的信噪比(signal to noise ratio，SNR)。具体地，当接收信号强度较弱时，AGC算法会提高第二终端装置的接收机的增益级数，使得接收信号的SNR达到可接受的范围。如果接收信号强度很强，AGC算法会衰减接收增益级，以避免信号削波和非线性退化所带来的SNR的恶化。
在侧行链路通信系统中，例如5G NR标准R16架构下，第一终端装置将一个时隙上的用于侧行链路通信的第二个符号的所有信息复制到该时隙的用于侧行链路通信的第一个符号上，为了方便描述，将该复制到该第一个符号上的信息称作AGC信息。为了减少在一个时隙上做AGC而导致的开销，第一终端装置在一个时隙内的符号上的发送功率相同，则第二终端装置只需要在一个时隙的用于侧行链路通信第一个符号做一次AGC，就可以确保AGC结果对于整个时隙而言是一致的。也就是说，根据这一次的AGC结果就可以在该时隙内确保接收信号强度在可接收的范围。具体地，第二终端装置在用于侧行链路通信的第一个符号上针对AGC信息进行AGC处理，并获得AGC结果，之后根据AGC结果来对该时隙中剩余的用于侧行链路通信的符号所接收的侧行链路信息进行译码，该时隙中剩余的用于侧行链路通信的符号包括用于侧行链路通信的第二个符号、用于侧行链路通信的最后一个符号以及位于此二者之间的符号。其中，侧行链路信息包括SCI和侧行数据，因此，AGC信息的接收和调整对于正确接收SCI和侧行数据是必要的。应理解，本申请中通过SCI表示用于调度侧行数据的控制信息，本申请并不限制用于调度侧行数据的控制信息还可以具有其他名称。
可见，如果AGC信息只承载于一个时隙中用于侧行链路通信的第一个符号上，且第一终端装置需要执行LBT来接入信道进行通信(例如，接入非授权频谱的信道)，则在该时隙上，第一终端装置必须在该时隙中的第一个符号的起始时刻完成LBT进而接入信道，才能在第一个符号发送AGC信息，使得第二终端在该时隙进行AGC调整，进而接收第一终端发送的侧行链路信息。因此，如果第一终端装置无法在该时隙中用于侧行链路通信的第一个符号进行AGC信息的传输，导致第二终端无法在侧行链路通信的第一个符号上进行AGC调整，也就无法在该时隙正确接收第一终端发送的侧行链路信息。第一终端只能等待下一个时隙的第一个符号上发送AGC信息，因此造成侧行链路通信时延增加。
本申请实施例提供一种通信方法，用于降低侧行链路通信的时延。该通信方法可由第一终端装置和/或第二终端装置执行。其中，第一终端装置可用于通过侧行链路向第二终端装置进行发送。
下面结合图5和图6，对本申请实施例提供的第一终端装置和/或第二终端装置可能的结构进行介绍。
示例性的，图5示出了一种可能的第一终端装置和/或第二终端装置的结构示意图，该结构可包括处理模块510和收发模块520。示例性地，图5所示结构可以是终端设备，也 可以是应用于终端设备中的芯片或者其他具有本申请所示终端设备功能的组合器件、部件或组件等。当该结构是终端设备时，收发模块520可以是收发器，收发器可以包括天线和射频电路等，处理模块510可以是处理器，例如基带处理器，基带处理器中可以包括一个或多个中央处理单元(central processing unit，CPU)。当该结构是具有本申请所示终端设备功能的部件时，收发模块520可以是射频单元，处理模块510可以是处理器，例如基带处理器。当该结构是芯片系统时，收发模块520可以是芯片，例如基带芯片，的输入输出接口，处理模块510可以是芯片系统的处理器，可以包括一个或多个中央处理单元。应理解，本申请实施例中的处理模块510可以由处理器或处理器相关电路组件实现，收发模块520可以由收发器或收发器相关电路组件实现。
例如，处理模块510可以用于执行本申请任一实施例中由第一终端装置和/或第二终端装置所执行的除了收发操作之外的全部操作，例如处理操作，和/或用于支持本文所描述的技术的其它过程，比如生成由收发模块520发送的消息、信息和/或信令，和对由收发模块520接收的消息、信息和/或信令进行处理。收发模块520可以用于执行本申请任一实施例中由第一终端装置和/或第二终端装置所执行的全部接收和发送操作，和/或用于支持本文所描述的技术的其它过程，例如数据的发送和/或接收。
另外，收发模块520可以是一个功能模块，该功能模块既能完成发送操作也能完成接收操作，例如收发模块520可以用于执行由中继节点和/或远端节点所执行的全部发送操作和接收操作，例如，在执行发送操作时，可以认为收发模块520是发送模块，而在执行接收操作时，可以认为收发模块520是接收模块；或者，收发模块520也可以是两个功能模块，收发模块520可以视为这两个功能模块的统称，这两个功能模块分别为发送模块和接收模块，发送模块用于完成发送操作，例如发送模块可以用于执行由第一终端装置和/或第二终端装置所执行的全部发送操作，接收模块用于完成接收操作，接收模块可以用于执行由第一终端装置和/或第二终端装置所执行的全部接收操作。
图6示出了另一种终端装置的结构示意图，用于执行本申请实施例提供的由第一终端装置和/或第二终端装置执行的动作。便于理解和图示方便。如图6所示，终端装置可包括处理器、存储器、射频电路、天线和/或输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对终端装置进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端装置可以不具有输入输出装置。
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端装置时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明，图6中仅示出了一个存储器和处理器。在实际的终端设备产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端装置的收发单元。 收发单元可以是一个功能单元，该功能单元能够实现发送功能和接收功能；或者，收发单元也可以包括两个功能单元，分别为能够实现接收功能的接收单元和能够实现发送功能的发送单元。可以将具有处理功能的处理器视为终端装置的处理单元。如图6所示，终端装置包括收发单元610和处理单元620。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元610中用于实现接收功能的器件视为接收单元，将收发单元610中用于实现发送功能的器件视为发送单元，即收发单元610包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
应理解，收发单元610可与收发模块520对应，或者说，收发模块520可由收发单元610实现。收发单元610用于执行本申请所示实施例中的第一终端装置和/或第二终端装置的发送操作和接收操作，和/或用于支持本文所描述的技术的其它过程。处理单元620可与处理模块510对应，或者说，处理模块510可由处理单元620实现。处理单元620用于执行本申请所示实施例第一终端装置和/或第二终端装置除了收发操作之外的其他操作，例如用于执行本申请所示实施例中由第一终端装置和/或第二终端装置所执行的除接收和发送以外的全部操作，和/或用于支持本文所描述的技术的其它过程。
此外，图5和/或图6所示结构还可用于实现网络设备或网络设备的组件，网络设备如基站、CU或DU等。比如，图5所示处理模块510和/或图6所示的处理单元620可用于实现本申请实施例提供的通信方法中由基站执行的处理步骤和/或除由基站执行的接收和发送以外的操作。图5所示的收发模块520和/或图6所示的收发单元610可用于实现本申请实施例提供的通信方法中由基站执行的接收操作和/或发送操作。如果图6所示结构用于实现网络设备，则该结构可不包括输入输出装置。本申请中为方便说明，可将网络设备或网络设备的组件称为第三通信装置。
下面结合附图对本申请实施例提供的通信方法进行说明。
根据该方法，第一终端装置和/或第二终端装置获取第一配置信息。该第一配置信息可用于第一终端装置和/或第二终端装置确定一个时隙中的至少两个AGC信息的候选位置和至少两个PSCCH的候选位置。因此，即便第一终端装置接入信道的时刻位于一个时隙中的某一个AGC信息的候选位置之后，第一终端装置还是能够根据信道接入时刻之后的AGC信息的候选位置在该时隙中进行AGC信息的发送，而不必等待下一个时隙的到来，因此能够降低侧行链路通信时延。
应理解，当通过图5和/或图6所示结构实现第一终端装置和/或第二终端装置时，本申请实施例提供的通信方法中的由第一终端装置和/或第二终端装置执行的接收和发送动作可由图5所示的收发模块520和/或图6所示的收发单元610执行；本申请实施例提供的通信方法中的由第一终端装置和/或第二终端装置执行的处理动作，和除接收和发送动作以外的其他动作可由图5所示处理模块510和/或图6所示的处理单元620执行。当通过图5和/或图6所示结构实现网络设备或网络设备中的组件时，本申请实施例提供的通信方法中的由网络设备执行的接收和发送动作可由图5所示的收发模块520和/或图6所示的收发单元610执行；本申请实施例提供的通信方法中的由网络设备执行的处理动作，和除接收和发送动作以外的其他动作可由图5所示处理模块510和/或图6所示的处理单元620执行。
如图7所示，本申请实施例提供的通信方法可包括以下步骤：
S101：第一终端装置和/或第二终端装置分别获取第一配置信息。
应理解，本申请中的获取包括通过接收的方式获取，还可包括通过从存储器中读取的方式获取。本申请对于第一终端装置和第二终端装置分别获取第一配置信息的时序不作具体限定，只需要第一终端装置和第二终端装置在进行侧行链路通信之前分别获取第一配置信息即可。
其中，第一终端装置和/或第二终端装置可接收来自于网络设备的第一配置信息。网络设备可通过系统信息块(system information block，SIB)、小区级(cell-specific)的无线资源控制(radio resource control，RRC)信令或者用户级(UE-specific)RRC信令发送第一配置信息。
可选的，第二终端装置也可以从第一终端装置获取第一配置信息。包括，第一终端装置将获取的第一配置信息通过PC5空口RRC信令、SL媒体接入控制层控制单元(media access control control element，MAC CE)和SCI等至少一种承载方式配置或指示给第二终端装置。
可选的，第一终端装置也可以从第二终端装置获取第一配置信息。包括，第二终端装置将获取的第一配置信息通过PC5空口RRC信令、SL MAC CE和SCI等至少一种承载方式配置或指示给第一终端装置。
可选的，第一配置信息可包括SL BWP配置信息和/或SL资源池配置信息。
可选的，S101中，第一终端装置和/或第二终端装置可接收来自于同一网络设备或不同的网络设备的第一配置信息。
应理解，S101中的获取包括接收和读取。读取例如从本地存储中获取，例如，该第一配置信息可存储在第一终端装置和/或第二终端装置中，则在S101中，第一终端装置和/或第二终端装置读取本地存储以获取第一配置信息。可选的，第一配置信息可预配置在第一终端装置和/或第二终端装置中。
S102：第一终端装置和/或第二终端装置根据第一配置信息确定第一时隙中连续的至少两个候选资源。连续的两个候选资源，是指前一个候选资源的最后一个符号的编号与后一个候选资源的第一个符号的编号在时域上连续。
其中，第一时隙包括用于侧行通信的符号和/或间隔(gap)符号。用于侧行通信的符号是指第一时隙中可以用于传输侧行链路信息的符号。间隔符号用于终端设备处理收发转换和/或考虑传输时延，不用于发送侧行链路信息。在一个时隙上，用于侧行通信的符号的位置和数量可以由第一配置指示或终端用户指示或预配置确定。
候选资源可包括第一时隙中连续的用于侧行通信的多个符号。该多个符号包括至少一个第一符号和至少一个第二符号。其中，第一符号可用于传输第一信息，或者说，第一符号为第一信息的候选资源。第二符号可用于传输SCI，或者说，第二符号为SCI的候选资源，或者说，第二符号可由PSCCH占用。候选资源中包括的第二符号的数量即PSCCH占用的连续的符号数量。或者说，多个候选资源中的一个候选资源中，第一符号可用于传输第一信息，第二符号可用于传输SCI。该第一符号位于第二符号之前，或者说，候选资源中的全部第一符号位于该候选资源的第一个第二符号之前。
可选的，该第一信息为AGC信息，即用于第二终端装置进行AGC的信息。第一信息可以是SCI的复制信息或SCI的子集的复制信息，这里的SCI是指承载于第二符号的SCI。 SCI的子集的复制信息是指复制SCI的一部分信息，当承载SCI的PSCCH所占用的符号数量大于一个符号时，只对其中一部分符号上的SCI进行复制作为第一信息，例如，承载SCI的PSCCH占用2个符号时，SCI的子集的复制信息为承载SCI的PSCCH上第1个符号的信息。第一信息也可以是第一时隙上任一符号上的信息的复制信息。第一信息也可以是用于AGC调整的序列。
示例性的，该第一配置信息可指示第一时隙中用于侧行通信的符号的起始位置，用
Figure PCTCN2021083402-appb-000001
表示第一时隙中的第一个用于侧行链路通信的符号的索引。该第一配置信息还可指示第一时隙中用于侧行通信的符号的数量，用
Figure PCTCN2021083402-appb-000002
表示。该第一配置信息还可指示第一时隙中PSCCH占用的连续的符号的数量，该数量也就是候选资源中第二符号的数量，用
Figure PCTCN2021083402-appb-000003
表示。第一配置信息还可以指示一个时隙上最小的用于侧行链路通信的符号个数，用
Figure PCTCN2021083402-appb-000004
表示，也就是说，一个时隙中包括的用于侧行通信的符号数量不少于
Figure PCTCN2021083402-appb-000005
另外，
Figure PCTCN2021083402-appb-000006
也可以是第一终端装置和/或第二终端装置决定的值、预配置在第一终端装置和/或第二终端装置中的值或标准中预定义的值，例如预定义
Figure PCTCN2021083402-appb-000007
可选的，第一时隙中用于侧行通信的符号的索引
Figure PCTCN2021083402-appb-000008
的取值为集合{0,1,2,…,l-1}中的一个，其中，
Figure PCTCN2021083402-appb-000009
一个时隙上最小的用于侧行链路通信的符号个数
Figure PCTCN2021083402-appb-000010
的取值为集合{1,2,3,…,14}中的一个；在一个时隙中的符号数量为14时，用于侧行通信的符号的数量
Figure PCTCN2021083402-appb-000011
的取值为集合
Figure PCTCN2021083402-appb-000012
中的一个。本发明中，为了方便描述，除非特殊说明，均以第一时隙中用于侧行通信的符号的起始位置的索引
Figure PCTCN2021083402-appb-000013
一个时隙上最小的用于侧行链路通信的符号个数
Figure PCTCN2021083402-appb-000014
用于侧行通信的符号的数量
Figure PCTCN2021083402-appb-000015
为例进行说明，但不限于该例。
可选的，第一配置信息中还包括
Figure PCTCN2021083402-appb-000016
表示第一时隙中候选资源的数量。或者，
Figure PCTCN2021083402-appb-000017
也可以是由第一终端装置和/或第二终端装置决定的值、预配置在第一终端装置和/或第二终端装置中的值或标准预定义的值。
其中，第一时隙中候选资源的数量
Figure PCTCN2021083402-appb-000018
表示满足：
Figure PCTCN2021083402-appb-000019
或者，第一时隙中候选资源的数量
Figure PCTCN2021083402-appb-000020
可以由第一配置信息指示，其取值为集合
Figure PCTCN2021083402-appb-000021
中的一个；或者，第一时隙中候选资源的数量
Figure PCTCN2021083402-appb-000022
可以是由标准预定义的值，例如取值为2或3。
可选地，如果考虑一个时隙内用于传输AGC信息、PSCCH和PSSCH所需要的最少的符号个数k，以及，考虑一个时隙内的最后l个符号是间隔符号，即该符号不发送SL信息，那么第一时隙中候选资源的数量满足：
Figure PCTCN2021083402-appb-000023
或者，
Figure PCTCN2021083402-appb-000024
的最大取值不超过
Figure PCTCN2021083402-appb-000025
第一配置信息可以指示
Figure PCTCN2021083402-appb-000026
的取值。
这里，k表示一个时隙上传输AGC信息、PSCCH和PSSCH所需要的最少的符号个数，是指当一个时隙中可用于传输AGC信息、PSCCH和PSSCH的符号的最少个数，可用于传输AGC信息、PSCCH和PSSCH的符号不包括间隔符号。k可以是网络设备配置的值、由第一终端装置和/或第二终端装置决定的值、预配置在第一终端装置和/或第二终端装置 中的值或标准预定义的值，例如k＝6。
一种示例性的第一时隙的结构如图8所示。可见，该第一时隙中，在k＝6，第二符号的数量为2，且将第一时隙中的最后一个符号作为间隔符号时，第一时隙中候选资源的数量
Figure PCTCN2021083402-appb-000027
可选的，第一配置信息中还可指示候选资源中第一符号的数量和/或第二符号的数量。可选的，候选资源中第一符号的数量和/或第二符号的数量可以是由第一终端装置和/或第二终端装置决定的值、预配置在第一终端装置和/或第二终端装置中的值或标准预定义的值。例如图8所示，标准预定义候选资源中第一符号的数量为1，第一配置信息指示第二符号的数量为2。
采用以上示例，第一终端装置和/或第二终端装置可根据第一配置信息确定候选资源，根据候选资源进行侧行链路通信。任意候选资源中的第一符号都可以用于第一信息的发送，因此即便第一终端装置的信道接入时刻位于第一时隙的一个候选资源中的第一符号的起始时刻之后，第一终端装置还可根据信道接入时刻之后的其他候选资源的第一符号进行第一信息的发送，而不必等待第一时隙的下一个时隙，降低侧行链路通信时延。
本申请实施例还提供一种通信方法，第一终端装置在第一时隙中的信道接入时刻之后的第一个候选资源的第一符号发送第一信息，以及在该第一个候选资源的第二符号发送SCI，用于调度侧行数据。第二终端装置可根据第一候选资源中的第一信息进行SCI的解码，并根据SCI进行侧行数据的解码，实现侧行链路通信。
应理解，图9所示方法可独立于图7所示流程，或在图7所示流程之后执行。或者说，图9所示流程的执行不必须依赖于图7所示的第一配置信息的配置过程。
如图9所示，该通信方法包括以下步骤：
S201：第一终端装置在第一候选资源的第一符号发送第一信息，以及在第一候选资源的第二符号发送SCI。其中，第一候选资源是第一时刻之后的候选资源中的第一个候选资源。第一时刻是第一终端装置的信道接入时刻。应理解，第一候选资源位于第一时隙内。第一终端装置可根据来自于网络设备的第一配置信息确定第一符号和/或第二符号的位置。或者，第一符号和/或第二符号可以是预配置在第一终端装置的或标准定义的。图9所示流程中，候选资源可参照图7中的说明，这里不再重复介绍。
例如，第一候选资源可以是起始时刻位于第一时刻之后的第一个候选资源。
可选的，第一时刻可以是第一终端装置执行LBT时，退避数值K减至0的时刻。或者，第一时刻是第一终端装置从节能状态唤醒(wake up)，进行SL通信的时刻。或者，第一时刻可以是第一终端装置接入网络进行发送SL信息的时刻。
可选的，第一终端装置可在第一候选资源的第二符号之后的第一资源上发送第三信息。其中，该第三信息可以包括侧行数据和/或侧行反馈信息，或者说，第三信息承载于PSSCH，又或者说，本申请中的第一资源可用于传输PSSCH。第一资源可包括该第二符号之后的第一符号和/或第二符号。或者，在分配给第一终端装置的PSCCH的资源和PSSCH的资源可以频分复用时，第一资源包括该第二符号和该第二符号之后的第一符号和/或第二符号。因为，PSCCH的资源包括第一候选资源的第二符号，此时第一候选资源的第二符号可复用为PSSCH的资源，也就是，第一候选资源的第二符号，和第一候选资源中的第二符号之后的第一符号和/或第二符号可用于传输PSSCH。
具体的，如果位于第一候选资源之后的候选资源数量大于0，则第一资源可包括位于 第一候选资源之后的候选资源中的第一符号和/或第二符号。例如，第一资源包括该第一时隙内的位于第一候选资源的第二符号之后的可用于侧行链路通信的部分或全部符号，其中，该部分或全部符号可包括至少一个候选资源的第一符号和第二符号。
如图10所示，如果第一终端装置的第一时刻位于符号#6的起始时刻或起始时刻之前，且符号#6为候选资源#3中的第一个符号，符号#6也是候选资源#3中的第一符号，则第一终端装置可在该符号#6发送第一信息。符号#7和符号8为候选资源#3中的第二符号，则可在符号#7和符号8发送SCI。如果在符号#7和#8上发送SCI，且分配给第一终端装置的PSCCH的资源和PSSCH的资源可以频分复用，则第一终端装置还可以在符号#7和#8发送侧行数据。图10所示示例中的第一资源包括符号#9至符号#12，即符号#9至符号#12可用于发送第三信息。可选的，如果第一资源在符号#9至符号#12还包括其他候选资源。另外，如果分配给第一终端装置的PSCCH的资源和PSSCH的资源可以频分复用，则第一终端装置可以在符号#7至符号#12发送第三信息，即此时第一资源包括符号#7至符号#12。
可选的，在S201之前，在第一终端装置在第一候选资源的起始时刻之前已经接入信道的情况下，如果第一终端装置在第一候选资源之前不进行侧行链路发送可能会导致信道到被其他终端装置通过竞争占用，造成传输时延进一步增加。为降低传输时延，第一终端装置可在第一候选资源之前发送第二信息，以避免已经接入的信道被其他终端装置占用。应理解，本申请中，资源的起始时刻是指资源的第一个符号的起始时刻。
第一终端装置可根据第一时刻位于第一时隙内的位置，确定是否发送第二信息。具体地，当第一时刻不在第一时隙内任何一个候选资源的起始时刻时，在第一时刻与下一个候选资源的起始时刻之间发送第二信息。
其中，第二信息可以是第一信息的复制信息、第一信息的子集的复制信息、SCI的复制信息、SCI的子集的复制信息、其他信息或解调参考信号(demodulation reference signal，DMRS)等参考信号，第一信息的扩展循环前缀(extended cyclic prefix，ECP)，SCI的ECP和其他信息如设定的信息等中的至少一种信息。
以图11为例，第一时刻位于符号#1内，即不在任何一个候选资源的起始时刻，第一时刻之后的第一个候选资源为候选资源#2，候选资源#2的第一符号为符号#3，则第一终端装置可在第一时刻与符号#3的起始时刻之间发送第二信息。具体的，第一终端装置可在符号#1中位于第一时刻之后的时域资源以及符号#2上发送第二信息。之后，第一终端装置可在符号#3上发送第一信息，进而在符号#4和符号#5发送SCI，其中，符号#4和#5是候选资源#2的第二符号，在该示例中也就是PSCCH的资源。如果在符号#4和符号#5上发送SCI，且分配给第一终端装置的PSCCH的资源和PSSCH的资源不能频分复用，也就是符号#4和符号#5不能用于传输第三信息，此时图11所示示例中第一资源包括符号#6至符号#12，即符号#6至符号#12可用于发送第三信息。另外，如果分配给第一终端装置的PSCCH的资源和PSSCH的资源可以频分复用，也就是符号#4和符号#5可以复用于传输第三信息，则第一终端装置可以在符号#4至符号#12发送第三信息，此时第一资源包括符号#4至符号#12。
可选的，如果第一时刻位于第一时隙内的最后一个候选资源的第一符号的起始时刻之后，则第一终端装置可在下一个时隙才能进行第一信息、SCI和第三信息的发送。示例性的，第一终端装置可以在第一时隙内的位于第一时刻之后的用于侧行链路通信的符号上发送第二信息。第一终端装置还可在下一个时隙内的第一个候选资源的第一符号上发送第一 信息，以及在该候选资源的第二符号上发送SCI。
S202：第二终端装置在第二符号上盲检测(blind decode)SCI。
其中，在第二时刻，第二终端装置根据承载于第一候选资源中的第一符号上的信息译码该承载于第一候选资源中的第二符号上的信息，获得SCI。也就是说，本申请中的第二时刻是指第二终端装置获得承载于第一候选资源中的第二符号的SCI的时刻。在第二时刻之后，第二终端装置可根据SCI译码该第二符号之后的资源上承载的信息。其中，第一候选资源对于第二终端装置来说，是第一时隙中的候选资源中的一个。
应理解，第二终端装置可根据来自于网络设备的第一配置信息确定第一时隙中的候选资源的第一符号和/或第二符号的位置。或者，第一时隙中的候选资源的第一符号和/或第二符号可以是预配置在第二终端装置的或标准定义的。
采用图9所示方法，第一终端装置在第一时隙中的多个第一符号中位于信道接入时刻之后的第一个候选资源中的第一符号上发送第一信息，以及在信道接入时刻之后的第一个候选资源中的第二符号上发送SCI即进行侧行链路通信，因此不需要等待下一个时隙再进行侧行链路通信，可降低侧行链路通信时延。
下面举例第二终端装置盲检测SCI和在第二时刻获得SCI的方式。应理解，能够实现本申请的盲检SCI的方法不以此为限。
由于第二终端装置无法获知第一终端装置的第一时刻，因此需要在第一时隙按时间顺序，对每个候选资源进行SCI的盲检测，直至在第二时刻正确获得SCI。对任一候选资源进行SCI的盲检测包括：根据候选资源中第一符号承载的信息执行AGC，获得该信息对应的AGC结果，根据AGC结果对候选资源同一候选资源中第二符号承载的信息进行译码，如果译码成功则获得承载于第二符号的SCI。其中，如果译码成功则表示该候选资源为第一候选资源，第一符号承载的信息为第一信息，即AGC信息，第二符号承载的信息是SCI，或者说，第二终端装置可确定该候选资源为第一候选资源，第一符号承载的信息为第一信息，即AGC信息，第二符号承载的信息是SCI。如果译码失败，则表示该候选资源不是第一候选资源，第一符号承载的信息不是第一信息，第二符号承载的信息不是SCI，或者说，第二终端装置可确定该候选资源不是第一候选资源，第一符号承载的信息不是第一信息，第二符号承载的信息不是SCI，第二终端装置可继续在第一时隙中的下一个候选资源上进行AGC调整和盲检测SCI。另外，第二终端装置也可以按照设定间隔和/或设定顺序，对第一时隙中的候选资源遍历执行以上动作。
可选的，图9所示的第二终端装置还可根据在第二时刻之前的第i个候选资源的第一符号上承载的信息进行AGC，其中，i＝1、2……n，n为第一时隙中位于第二时刻之前的候选资源的数量，其中，
Figure PCTCN2021083402-appb-000028
为第一时隙中候选资源的数量。
换句话说，第二终端装置在根据第一信息获得SCI之前，对在第一时隙中接收到的每一个或至少两个候选资源的中第一符号所承载的信息执行AGC，获得AGC结果，AGC结果可用于SCI和/或侧行数据的接收。
后续为方便说明，将承载于第一时隙中的第i个候选资源的第一符号的信息称为
Figure PCTCN2021083402-appb-000029
信息，将承载于第一时隙中的第i个候选资源的第二符号的信息称为
Figure PCTCN2021083402-appb-000030
信息。另外，将根据
Figure PCTCN2021083402-appb-000031
信息进行AGC所获得的AGC结果称为
Figure PCTCN2021083402-appb-000032
信息对应的AGC结果，其中，i＝1、2……n，n为第一时隙中位于第二时刻之前的候选资源的数量，其中，
Figure PCTCN2021083402-appb-000033
为第一时隙中候选资源的数量。
这里结合图12，对第二终端装置在第一时隙中对于SCI的盲检测过程，对第二终端装置进行AGC的过程进行说明。其中，第二终端装置可在对任一候选资源进行SCI的盲检测过程中，根据候选资源的中第一符号所承载的信息执行AGC，获得AGC结果，根据AGC结果进行SCI的盲检测，也就是根据AGC结果确定是否能够在该候选资源正确译码SCI。
如图12所示，第二终端装置可以在候选资源#1进行SCI的盲检测，比如，第二终端装置在候选资源#1的第一符号即符号#0接收
Figure PCTCN2021083402-appb-000034
信息，根据
Figure PCTCN2021083402-appb-000035
信息执行AGC，获得
Figure PCTCN2021083402-appb-000036
信息对应的AGC结果，根据
Figure PCTCN2021083402-appb-000037
信息对应的AGC结果在候选资源#1的第二符号即符号#1和符号#2接收
Figure PCTCN2021083402-appb-000038
信息，之后根据
Figure PCTCN2021083402-appb-000039
信息盲检测SCI。之后，第二终端装置还可以在候选资源#2进行SCI的盲检测，例如，第二终端装置可以在候选资源#2的第一符号即符号#3接收
Figure PCTCN2021083402-appb-000040
信息，根据
Figure PCTCN2021083402-appb-000041
信息执行AGC，获得
Figure PCTCN2021083402-appb-000042
信息对应的AGC结果，根据
Figure PCTCN2021083402-appb-000043
信息对应的AGC结果在候选资源#2的第二符号即符号#4和符号#5接收
Figure PCTCN2021083402-appb-000044
信息，之后根据
Figure PCTCN2021083402-appb-000045
信息盲检测SCI。之后，第二终端装置还可以在候选资源#3进行SCI的盲检测，例如，第二终端装置可以在候选资源#3的第一符号即符号#6接收
Figure PCTCN2021083402-appb-000046
信息，根据
Figure PCTCN2021083402-appb-000047
信息执行AGC，获得
Figure PCTCN2021083402-appb-000048
信息对应的AGC结果，根据
Figure PCTCN2021083402-appb-000049
信息对应的AGC结果在候选资源#3的第二符号即符号#7和符号#8接收
Figure PCTCN2021083402-appb-000050
信息，之后根据
Figure PCTCN2021083402-appb-000051
信息盲检测SCI。
可选的，如果在根据承载于
Figure PCTCN2021083402-appb-000052
信息对应的AGC结果译码
Figure PCTCN2021083402-appb-000053
信息之前，第二终端装置已经根据
Figure PCTCN2021083402-appb-000054
信息对应的AGC结果译码
Figure PCTCN2021083402-appb-000055
信息获得SCI，则可以停止根据
Figure PCTCN2021083402-appb-000056
信息对应的AGC结果译码
Figure PCTCN2021083402-appb-000057
信息。同理，如果在根据
Figure PCTCN2021083402-appb-000058
信息对应的AGC结果译码
Figure PCTCN2021083402-appb-000059
信息之前，第二终端装置已经根据
Figure PCTCN2021083402-appb-000060
信息对应的AGC结果译码
Figure PCTCN2021083402-appb-000061
信息获得SCI，或根据
Figure PCTCN2021083402-appb-000062
信息对应的AGC结果译码
Figure PCTCN2021083402-appb-000063
信息获得SCI，则可以停止根据
Figure PCTCN2021083402-appb-000064
信息对应的AGC结果译码
Figure PCTCN2021083402-appb-000065
信息。
其中，如果第一终端装置在候选资源#3的第一符号即符号#6发送第一信息，以及在候选资源#3的第二符号即符号#7和符号#8发送SCI，由于第二终端装置的译码存在时延，第二终端装置获得SCI的第二时刻可能位于候选资源#3之后。第二终端装置在第二时刻根据对候选资源#3的盲检测获得SCI之后，可确定候选资源#3为第一候选资源。
在获得SCI之后，第二终端装置可根据能够正确译码SCI的AGC结果和正确接收的SCI，在第一时隙中对侧行数据进行译码。
另外，由于第二终端装置需要根据承载于第i个候选资源的第一符号的
Figure PCTCN2021083402-appb-000066
信息对应的AGC结果接收承载于第i个候选资源的第二符号的
Figure PCTCN2021083402-appb-000067
信息，用于盲检测SCI，所以，第二终端装置是根据能否正确译码SCI来识别
Figure PCTCN2021083402-appb-000068
信息是否是SCI以及识别
Figure PCTCN2021083402-appb-000069
信息是否是第一信息的。但信息的译码需要一定译码时延，如果第二终端装置识别承载于第p个候选资源的第一符号的第
Figure PCTCN2021083402-appb-000070
信息是第一信息以及识别承载于第p个候选资源的第二符号的第
Figure PCTCN2021083402-appb-000071
信息是SCI，意味着该第p个候选资源为第一候选资源，且第p个候选资源之后的候选资源上传输的可能是第三信息，如侧行数据和/或侧行反馈信息，其中，
Figure PCTCN2021083402-appb-000072
为第一时隙中候选资源的数量。则此时第二终端装置不能将承载于该第p个候选资源之后的资源上的任何信息删除，否则会导致侧行传输丢包，传输可靠性降低。
为了提高传输可靠性，可选的，第二终端装置可存储在第二时刻之前接收到的除了第一个候选资源之外的所有候选资源中的第一符号和第二符号上承载的信息用于数据的译码，和/或，第二终端装置可以存储在第二时刻之前接收到的承载于第j个候选资源的第一符号的
Figure PCTCN2021083402-appb-000073
信息和承载于第j个候选资源的第二符号的
Figure PCTCN2021083402-appb-000074
信息，其中，j＝2、3……n，n为第一时隙中位于第二时刻之前的候选资源的数量，
Figure PCTCN2021083402-appb-000075
Figure PCTCN2021083402-appb-000076
为第一时隙中候选资源的数量。为方便说明，可将除了第一个候选资源之外的所有候选资源中的第一符号和第二符号上承载的信息称为第四信息，和/或，将第二终端装置在第二时刻之前接收到的
Figure PCTCN2021083402-appb-000077
信息和
Figure PCTCN2021083402-appb-000078
信息称为第四信息。或者说，第四信息包括第一个候选资源之外的所有候选资源中的第一符号和第二符号上承载的信息，和/或，第二终端装置在第二时刻之前接收到的承载于第i个候选资源的第一符号的
Figure PCTCN2021083402-appb-000079
信息和承载于第i个候选资源的第二符号的
Figure PCTCN2021083402-appb-000080
信息。如图8所示，在接收承载于第2个候选资源的第一符号的
Figure PCTCN2021083402-appb-000081
信息之前或之时，如果第二终端装置尚未正确译码SCI，则在接收
Figure PCTCN2021083402-appb-000082
信息之后，第二终端装置可存储该
Figure PCTCN2021083402-appb-000083
信息。
另外，因为第一个候选资源的起始符号为第一时隙中可用于侧行传输的起始符号，所以，对于第一终端装置而言，最早只能在该符号上发送第一信息，即不会在该符号上发送侧行数据信息，那么对于第二终端装置而言，不需要储存第一时隙中可用于侧行传输的起始符号的信息，也就是说，不需要存储承载于第1个候选资源的第一符号的
Figure PCTCN2021083402-appb-000084
信息和承载于第1个候选资源的第二符号的
Figure PCTCN2021083402-appb-000085
信息。
下面以图12为例，对第二终端装置所执行的动作进行具体说明。
图12中，第一终端装置在候选资源#2的第一符号即符号#3发送第一信息、在候选资源#2的第二符号即符号#4和符号#5发送SCI，以及在第一时隙中用于侧行通信的即符号#6至符号#12发送侧行数据，也就是说第一资源包括符号#6至符号#12。其中，在符号#1内的某个时刻为t1时刻。第二终端装置根据在第一时隙中的可用于侧行通信的第一符号接收的
Figure PCTCN2021083402-appb-000086
信息执行AGC，获得
Figure PCTCN2021083402-appb-000087
信息对应的AGC结果，其中，该可用于侧行通信的第一符号即符号#0，符号#0也就是候选资源#1中的第一符号。以及，第二终端装置根据
Figure PCTCN2021083402-appb-000088
信息对应的AGC结果，对在候选资源#1中的第二符号即符号#1和符号#2上接收的
Figure PCTCN2021083402-appb-000089
信息进行译码
Figure PCTCN2021083402-appb-000090
其中，由于译码时延，第二终端装置不能在接收到
Figure PCTCN2021083402-appb-000091
信息后便立即完成对
Figure PCTCN2021083402-appb-000092
信息的译码，也就是说，第二终端装置在符号#2的结束时刻或符号#3起始时刻不能完成对
Figure PCTCN2021083402-appb-000093
信息的译码，也就不知道能否获得SCI。所以第二终端装置在结束译码
Figure PCTCN2021083402-appb-000094
信息前，可根据在候选资源#2中的第一符号即符号#3接收的
Figure PCTCN2021083402-appb-000095
信息进行AGC处理，确定该
Figure PCTCN2021083402-appb-000096
信息对应的AGC结果，和/或储存该
Figure PCTCN2021083402-appb-000097
信息。之后，第二终端装置可根据该
Figure PCTCN2021083402-appb-000098
信息对应的AGC结果对在候选资源#2中的第二符号即符号#4和符号#5上接收的
Figure PCTCN2021083402-appb-000099
信息，进行译码。
其中，如果在t1时刻，第二终端装置尚未根据在第i个候选资源中的第一符号接收的
Figure PCTCN2021083402-appb-000100
信息对应的AGC结果，正确译码在第i个候选资源中的第二符号接收的
Figure PCTCN2021083402-appb-000101
信息获得SCI，i＝1或2，则第二终端装置可继续根据在候选资源#3的第一符号即符号#6上接收的
Figure PCTCN2021083402-appb-000102
信息执行AGC，获得
Figure PCTCN2021083402-appb-000103
信息对应的AGC结果并储存
Figure PCTCN2021083402-appb-000104
信息，以及根据
Figure PCTCN2021083402-appb-000105
信息对应的AGC结果对在候选资源#3的第二符号即符号#7和符号#8上接收的
Figure PCTCN2021083402-appb-000106
信息进行译码。假设在t1+k时刻，第二终端装置根据在符号#3接收的
Figure PCTCN2021083402-appb-000107
信息对应的AGC结果正确译码在符号#4和符号#5上接收的
Figure PCTCN2021083402-appb-000108
信息获得SCI，即t1+k时刻为第二时刻，则在t1+k时刻之后，第二终端装置可根据SCI对SCI调度的侧行数据信息进行译码。其中，t1+k＞t1。具体地，如果分配给第一终端装置的PSCCH的资源和PSSCH的资源可以频分复用，第二终端装置可以根据对符号#4及符号#4之后的用于侧行链路通信的符号上接收的侧行数据信息进行译码，其中，符号#4及符号#4之后的用于侧行链路通信的符号，包括第二终端装置存储的
Figure PCTCN2021083402-appb-000109
信息；否则，如果分配给第一终端装置的 PSCCH的资源和PSSCH的资源不能够频分复用，则第二终端装置可对符号#6及符号#6之后的用于侧行链路通信的符号上接收的侧行数据信息进行译码，其中，符号#6及符号#6之后的用于侧行链路通信的符号上接收的信息，包括第二终端装置存储的
Figure PCTCN2021083402-appb-000110
信息。
可选的，在第二时刻之后，第二终端装置停止在第一时隙中的候选资源上执行AGC和SCI的盲检测，以节省处理开销。比如图12所示，在t1+k时刻之后，即便第一时隙中还包括候选资源，第二终端装置也不再根据第一时隙中t1+k时刻之后的候选资源的第一符号所承载的信息执行AGC，也不再根据第一时隙中t1+k时刻之后的候选资源的第二符号进行SCI的盲检测。
另一种情况，如果第二终端装置在slot x之前已获知，第一终端装置将在slot x上的第一个候选资源的第一符号上发送第一信息，则第二终端装置只在slot x上的第一个候选资源的第一符号上进行AGC，根据AGC结果对在第一个候选资源的第二符号上接收的信息进行PSCCH译码。可选的，即使此时第二终端装置的PSCCH译码失败，也不会在该slotx的其他候选资源的第二符号进行PSCCH译码。同样地，也不会在该slot x的其他候选资源的第一符号做AGC处理。
本申请实施例提供一种通信装置。该通信装置可用于实现上述实施例所涉及的第一终端装置，该通信装置可包括图5和/或图6所示结构。该通信装置可用于执行上述方法实施例中由第一终端装置执行的步骤。
本申请实施例提供一种通信装置。该通信装置可用于实现上述实施例所涉及的第二终端装置，该通信装置可包括图5和/或图6所示结构。该通信装置可用于执行上述方法实施例中由第二终端装置执行的步骤。
本申请实施例提供一种通信装置。该通信装置可用于实现上述实施例所涉及的网络设备，该通信装置可包括图5和/或图6所示结构。该通信装置可用于执行上述方法实施例中由网络设备执行的步骤。
本申请实施例提供一种通信系统。该通信系统可包括上述实施例所涉及的第一终端装置、第二终端装置和网络设备，用于实现图7所示方法。或者，该通信系统可以包括上述实施例所涉及的第一终端装置和第二终端装置，用于实现图9所示方法。
本申请实施例还提供一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，该计算机程序被计算机执行时，该计算机可以实现上述方法实施例中任一所示的实施例中与第一终端装置、第二终端装置和/或网络设备相关的流程。
本申请实施例还提供一种计算机程序产品，该计算机程序产品用于存储计算机程序，该计算机程序被计算机执行时，该计算机可以实现上述方法实施例中任一所示的实施例中与第一终端装置、第二终端装置和/或网络设备相关的流程。
本申请实施例还提供一种芯片或芯片系统，该芯片可包括处理器，该处理器可用于调用存储器中的程序或指令，执行上述方法实施例中任一所示的实施例中与第一终端装置、第二终端装置和/或网络设备相关的流程。该芯片系统可包括该芯片，还可存储器或收发器等其他组件。
本申请实施例还提供一种电路，该电路可与存储器耦合，可用于执行上述方法实施例中任一所示的实施例中与第一终端装置、第二终端装置和/或网络设备相关的流程。该芯片系统可包括该芯片，还可存储器或收发器等其他组件。
可以理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序 的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
可以理解，在本申请中，“当…时”、“若”以及“如果”均指在某种客观情况下装置会做出相应的处理，并非是限定时间，且也不要求装置实现时一定要有判断的动作，也不意味着存在其它限定。
本领域技术人员可以理解：本申请中涉及的第一、第二等各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。本申请中的编号或索引的具体取值、数量的具体取值、以及位置仅作为示意的目的，并不是唯一的表示形式，也并不用来限制本申请实施例的范围。本申请中涉及的第一个、第二个等各种数字编号也仅为描述方便进行的区分，并不用来限制本申请实施例的范围。
另外，本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系；本申请中术语“至少一个”，可以表示“一个”和“两个或两个以上”，例如，A、B和C中至少一个，可以表示：单独存在A，单独存在B，单独存在C、同时存在A和B，同时存在A和C，同时存在C和B，同时存在A和B和C，这七种情况。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质上实施的计算机程序产品的形式，存储介质包括但不限于磁盘存储器、CD-ROM、光学存储器等。
本申请是参照根据本申请的方法、设备、系统、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的保护范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (32)

  1. 一种通信方法，其特征在于，包括：
    获取第一配置信息；
    根据所述第一配置信息确定第一时隙中的连续的至少两个候选资源，所述候选资源包括连续的多个符号，所述多个符号包括至少一个第一符号和至少一个第二符号，所述第一符号用于传输第一信息，所述第二符号用于传输侧行链路控制信息，所述第一符号在所述第二符号之前。
  2. 如权利要求1所述的方法，其特征在于，所述第一配置信息包括所述候选资源中连续的所述第二符号的个数信息。
  3. 如权利要求1或2所述的方法，其特征在于，应用于第一终端装置，还包括：
    在第一候选资源的所述第一符号发送第一信息，以及在所述第一候选资源的所述第二符号发送侧行链路控制信息，所述第一候选资源是第一时刻之后的所述候选资源中的第一个候选资源，所述第一时刻是所述第一终端装置的信道接入时刻，所述第一时刻在所述第一时隙内。
  4. 如权利要求3所述的方法，其特征在于，所述第一时刻在所述第一候选资源的起始时刻之前，还包括：
    在所述第一时刻至所述第一候选资源的起始时刻之间发送第二信息。
  5. 如权利要求4所述的方法，其特征在于，所述第二信息包括所述第一信息的复制信息、所述侧链路控制信息的复制信息、所述第一信息的扩展循环前缀或所述侧链路控制信息的扩展循环前缀。
  6. 如权利要求3-5中任一所述的方法，其特征在于，还包括：
    在第一资源上发送第三信息，所述第一资源包括所述第一候选资源之后的所述第一符号和/或所述第二符号，所述第三信息承载于侧行链路数据信道中。
  7. 如权利要求1所述的方法，其特征在于，应用于第二终端装置，还包括：
    在所述第二符号上盲检测侧行链路控制信息。
  8. 如权利要求7所述的方法，其特征在于，还包括：
    在第二时刻之后，停止在所述第一时隙中的所述候选资源上盲检测侧行链路控制信息，所述第二时刻为所述第二终端装置获得第一候选资源中的所述第二符号所承载的侧行链路控制信息的时刻，所述第一候选资源为所述候选资源中的一个。
  9. 如权利要求7所述的方法，其特征在于，所述在所述第二符号上盲检测侧行链路控制信息，包括：
    根据在第二时刻之前的所述候选资源中的第i个候选资源的所述第一符号上承载的信息，进行自动增益控制调整，其中，i＝1、2……n，n为所述第一时隙中位于所述第二时刻之前的所述候选资源的数量，所述第二时刻为所述第二终端装置获得第一候选资源中的所述第二符号所承载的侧行链路控制信息的时刻，所述第一候选资源为所述候选资源中的一个；
    根据所述自动增益控制调整的结果译码所述第i个候选资源的所述第二符号上承载的信息。
  10. 如权利要求7-9中任一所述的方法，其特征在于，还包括：
    存储至少一个第四信息，所述第四信息为第二时刻之前在所述候选资源中的第j个候选资源的所述第一符号和所述第二符号上承载的信息，j＝2、3……n，n为所述第一时隙中位于所述第二时刻之前的所述候选资源的数量，所述第二时刻为所述第二终端装置获得第一候选资源中的所述第二符号所承载的侧行链路控制信息的时刻，所述第一候选资源为所述候选资源中的一个。
  11. 如权利要求10所述的方法，其特征在于，还包括：
    根据所述侧行链路控制信息，译码所述第一候选资源之后的所述第四信息和最后一个所述第四信息之后的信息。
  12. 一种通信方法，其特征在于，包括：
    确定第一配置信息，所述第一配置信息用于指示第一时隙中的至少两个候选资源，所述候选资源包括连续的多个符号，所述多个符号包括至少一个第一符号和至少一个第二符号，所述第一符号用于传输第一信息，所述第二符号用于传输侧行链路控制信息，所述第一符号在所述第二符号之前；
    发送所述第一配置信息。
  13. 如权利要求12所述的方法，其特征在于，所述第一配置信息包括所述候选资源中连续的所述第二符号的个数信息。
  14. 一种通信装置，其特征在于，包括：
    收发模块，用于获取第一配置信息；
    处理模块，用于根据所述第一配置信息确定第一时隙中的连续的至少两个候选资源，所述候选资源包括连续的多个符号，所述多个符号包括至少一个第一符号和至少一个第二符号，所述第一符号用于传输第一信息，所述第二符号用于传输侧行链路控制信息，所述第一符号在所述第二符号之前。
  15. 如权利要求14所述的通信装置，其特征在于，所述第一配置信息包括所述候选资源中连续的所述第二符号的个数信息。
  16. 如权利要求14或15所述的通信装置，其特征在于，所述收发模块还用于：
    在第一候选资源的所述第一符号发送第一信息，以及在所述第一候选资源的所述第二符号发送侧行链路控制信息，所述第一候选资源是第一时刻之后的所述候选资源中的第一个候选资源，所述第一时刻是所述终端装置的信道接入时刻，所述第一时刻在所述第一时隙内。
  17. 如权利要求16所述的通信装置，其特征在于，所述第一时刻在所述第一候选资源的起始时刻之前，所述收发模块还用于：
    在所述第一时刻至所述第一候选资源的起始时刻之间发送第二信息。
  18. 如权利要求17所述的通信装置，其特征在于，所述第二信息包括所述第一信息的复制信息、所述侧链路控制信息的复制信息、所述第一信息的扩展循环前缀或所述侧链路控制信息的扩展循环前缀。
  19. 如权利要求16-18中任一所述的通信装置，其特征在于，所述收发模块还用于：
    在第一资源上发送第三信息，所述第一资源包括所述第一候选资源之后的所述第一符号和/或所述第二符号，所述第三信息承载于侧行链路数据信道中。
  20. 如权利要求14所述的通信装置，其特征在于，所述收发模块还用于：
    在所述第二符号上盲检测侧行链路控制信息。
  21. 如权利要求20所述的通信装置，其特征在于，所述收发模块还用于：
    在第二时刻之后，停止在所述第一时隙中的所述候选资源上盲检测侧行链路控制信息，所述第二时刻为所述第二终端装置获得第一候选资源中的所述第二符号所承载的侧行链路控制信息的时刻，所述第一候选资源为所述候选资源中的一个。
  22. 如权利要求20所述的通信装置，其特征在于，所述收发模块具体用于：
    根据在第二时刻之前的所述候选资源中的第i个候选资源的所述第一符号上承载的信息，进行自动增益控制调整，其中，i＝1、2……n，n为所述第一时隙中位于所述第二时刻之前的所述候选资源的数量，所述第二时刻为所述第二终端装置获得第一候选资源中的所述第二符号所承载的侧行链路控制信息的时刻，所述第一候选资源为所述候选资源中的一个；
    根据所述自动增益控制调整的结果译码所述第i个候选资源的所述第二符号上承载的信息。
  23. 如权利要求20-22中任一所述的通信装置，其特征在于，所述处理模块还用于：
    存储至少一个第四信息，所述第四信息为第二时刻之前在所述候选资源中的第j个候选资源的所述第一符号和所述第二符号上承载的信息，j＝2、3……n，n为所述第一时隙中位于所述第二时刻之前的所述候选资源的数量，所述第二时刻为所述第二终端装置获得第一候选资源中的所述第二符号所承载的侧行链路控制信息的时刻，所述第一候选资源为所述候选资源中的一个。
  24. 如权利要求23所述的通信装置，其特征在于，所述收发模块还用于：
    根据所述侧行链路控制信息，译码所述第一候选资源之后的所述第四信息和最后一个所述第四信息之后的信息。
  25. 一种通信装置，其特征在于，包括：
    处理模块，用于确定第一配置信息，所述第一配置信息用于指示第一时隙中的至少两个候选资源，所述候选资源包括连续的多个符号，所述多个符号包括至少一个第一符号和至少一个第二符号，所述第一符号用于传输第一信息，所述第二符号用于传输侧行链路控制信息，所述第一符号在所述第二符号之前；
    收发模块，用于发送所述第一配置信息。
  26. 如权利要求25所述的通信装置，其特征在于，所述第一配置信息包括所述候选资源中连续的第二符号的个数信息。
  27. 一种通信装置，其特征在于，包括：
    存储器，用于存储指令；
    处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求1-11中任一项所述的方法。
  28. 一种通信装置，其特征在于，包括：
    存储器，用于存储指令；
    处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求12或13所述的方法。
  29. 一种通信系统，其特征在于，包括如权利要求14-24或27中任一所述的通信装置和如权利要求25-26或28中任一所述的通信装置。
  30. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当所述指令在计算机上被调用执行时，使得所述计算机执行如权利要求1-13中任一项所述的方法。
  31. 一种计算机程序产品，其特征在于，当所述计算机程序产品在计算机上运行时，使得所述计算机执行如权利要求1-13中任一项所述的方法。
  32. 一种电路，其特征在于，所述电路与存储器耦合，所述电路用于读取并执行所述存储器中存储的程序以执行如权利要求1-13中任一项所述的方法。
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