WO2022227993A1 - 用于检测pscch的方法和通信装置 - Google Patents

用于检测pscch的方法和通信装置 Download PDF

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Publication number
WO2022227993A1
WO2022227993A1 PCT/CN2022/083728 CN2022083728W WO2022227993A1 WO 2022227993 A1 WO2022227993 A1 WO 2022227993A1 CN 2022083728 W CN2022083728 W CN 2022083728W WO 2022227993 A1 WO2022227993 A1 WO 2022227993A1
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Prior art keywords
indication information
terminal device
pscch
resources
pssch
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PCT/CN2022/083728
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English (en)
French (fr)
Inventor
王碧钗
李雪茹
徐海博
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华为技术有限公司
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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 EP22794466.7A priority Critical patent/EP4319410A1/en
Publication of WO2022227993A1 publication Critical patent/WO2022227993A1/zh
Priority to US18/496,037 priority patent/US20240057127A1/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
    • H04W72/25—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
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H04B17/328—Reference signal received power [RSRP]; Reference signal received quality [RSRQ]
    • 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
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • 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
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • 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
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/028—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present application relates to the field of communications, and more particularly to a method and a communications apparatus for detecting PSCCH in the field of communications.
  • Terminal devices can communicate directly through sidelinks (SLs). Compared with cellular communication, SL communication can reduce the transmission delay and relieve the load of the cellular network.
  • SL communication can reduce the transmission delay and relieve the load of the cellular network.
  • There are two resource allocation methods through SL communication one is that the network device allocates resources for SL communication, and the other is that the terminal device selects resources from a preconfigured resource pool. If the terminal device is within the coverage of the network device, the terminal device can use the resources allocated by the network device to perform SL communication or select resources from a preconfigured resource pool to perform SL communication. If the terminal device is outside the coverage of the network device, the terminal device needs to select resources from the preconfigured resource pool.
  • the terminal device can send a physical sidelink control channel (PSCCH) on the resources selected in the preconfigured resource pool, and the terminal device receiving the PSCCH needs to blindly detect the PSCCH in the preconfigured resource pool,
  • PSCCH physical sidelink control channel
  • the bandwidth of the resources in the preconfigured resource pool is relatively large or the corresponding sub-channels are relatively large, the blind detection overhead of the terminal equipment receiving the PSCCH is relatively large, resulting in relatively large power consumption.
  • the embodiments of the present application provide a method and a communication apparatus for detecting PSCCH, which can reduce the overhead of blind detection, thereby also reducing the power consumption of a terminal device.
  • a first aspect provides a method for detecting PSCCH, the method is applicable to a first terminal device, the method includes: receiving first indication information, where the first indication information is used to indicate a candidate resource set, the candidate resource The resources included in the set are candidate resources for the second terminal device to send the PSCCH; the first PSCCH is detected according to the resources included in the candidate resource set indicated by the first indication information.
  • the first terminal device can detect the first PSCCH according to the resources included in the candidate resource set indicated by the first indication information, thereby reducing the overhead caused by the first terminal device needing to blindly detect the PSCCH and helping to reduce energy consumption.
  • the bandwidth is relatively large or there are many sub-channels, the overhead caused by the need for the first terminal device to blindly detect the PSCCH can be reduced.
  • the set of candidate resources includes one or more resources.
  • one or more resources included in the candidate resource set may be one or more frequency domain resources, or may be one or more time domain resources, or may be one or more time-frequency domain resources.
  • the candidate resource set may be preconfigured or configured by the network device.
  • the candidate resource set may be determined by the second terminal device.
  • detecting the first PSCCH according to the resources included in the candidate resource set indicated by the first indication information includes: if the received reference signal received power RSRP corresponding to the first indication information is received is greater than a first RSRP threshold, according to The resources included in the candidate resource set indicated by the first indication information detect the first PSCCH.
  • the first terminal device when the RSRP of the first terminal device receiving the first indication information is greater than the first RSRP threshold, the first terminal device detects the first PSCCH according to the resources included in the candidate resource set.
  • the situation of detecting the first PSCCH after receiving the first indication information the first terminal device determines whether it needs to detect the PSCCH according to the RSRP of the first indication information. If the signal strength is high, or the distance between the first terminal device and the second terminal device is relatively short, if the first terminal device is the target receiving device of the second terminal device, the first terminal device detects the first PSCCH sent by the second terminal device.
  • the transmitted first PSCCH can avoid the resource selected by the second terminal device.
  • the RSRP for receiving the first indication information may be receiving a message, and the RSRP of the message may be the RSRP for receiving the first indication information, or the RSRP of the message associated with the message may be the RSRP for receiving the first indication information.
  • the first RSRP threshold is preset or configured by a network device.
  • the first indication information is further used to indicate a first service priority; the method further includes: according to the first service priority and a second service priority of the first terminal device level to determine the first RSRP threshold, or determine the first RSRP threshold according to the first service priority.
  • the first terminal device may determine the first RSRP threshold according to the first service priority indicated by the first indication information. Or the first terminal device may determine the first RSRP threshold according to the first service priority and the second service priority of the first terminal device. A situation in which the first terminal device cannot determine the first RSRP threshold is avoided.
  • the first service priority is the priority of the service.
  • the first service priority may be the priority corresponding to the service with the highest priority among the multiple services.
  • the first service priority may be a priority corresponding to any one of the multiple services.
  • the first terminal device may preset a correspondence between the service priority and the RSRP threshold.
  • the first terminal device may determine the first RSRP threshold according to the first service priority indicated by the first indication information and the corresponding relationship, or the first terminal device may determine the first RSRP threshold according to the first service priority, the second service priority and the corresponding relationship. RSRP threshold.
  • the first indication information is further used to indicate a target address, the target address indicated by the first indication information is an address corresponding to a service, and the target address indicated by the first indication information is an address corresponding to a service.
  • the resources included in the candidate resource set detect the first PSCCH, including:
  • the first terminal device If the first terminal device has a target address of a service that is the same as the target address indicated by the first indication information, detect the first PSCCH according to the resources included in the candidate resource set indicated by the first indication information;
  • the method also includes:
  • a first physical sidelink shared channel PSSCH associated with the first PSCCH is received from the first PSCCH.
  • the first terminal device if the first terminal device has a destination address that is the same as the target address indicated by the first indication information, it means that the second terminal device sending the first indication information needs to transmit PSSCH with the first terminal device. Therefore, the first terminal device needs to detect the first PSCCH according to the candidate resource set, and receive the first PSSCH associated with the first PSCCH from the second terminal device, which provides a possibility for the first terminal device and the second terminal device to transmit the first PSSCH .
  • the target address indicated by the first indication information may be the target ID of the first service at layer 2 determined by the second terminal device, and the target address of a service existing in the first terminal device may be the first terminal device existing in the first terminal device.
  • the first PSSCH associated with the first PSCCH may be the PSSCH corresponding to the first service.
  • radio resource control RRC signaling is received through the second PSSCH, where the RRC signaling carries the first indication information.
  • the second terminal device can send the RRC signaling carrying the first indication information through the second PSSCH, and the first terminal device can receive the RRC signaling carrying the first indication information through the second PSSCH.
  • a medium access control layer unit MAC CE is received through the second PSSCH, and the MAC CE carries the first indication information.
  • the second terminal device may send the MAC CE bearing the first indication information through the second PSSCH, and the first terminal device may receive the MAC CE bearing the first indication information through the second PSSCH.
  • the second-stage sidelink control information SCI2 is received through the second PSSCH, and the SCI2 carries the first indication information.
  • the second terminal device may send the SCI2 bearing the first indication information through the second PSSCH, and the first terminal device may receive the SCI2 bearing the first indication information through the second PSSCH.
  • receiving sidelink control information SCI associated with the second PSSCH the SCI includes second indication information, and the second indication information is used to indicate that the second PSSCH carries the first indication information.
  • the first terminal device can determine that the second PSSCH carries the first indication information according to the second indication information carried in the SCI associated with the second PSSCH, so that it is convenient for the first terminal device to determine the second indication information according to the second indication information.
  • the first indication information in PSSCH can be determined that the second PSSCH carries the first indication information according to the second indication information carried in the SCI associated with the second PSSCH, so that it is convenient for the first terminal device to determine the second indication information according to the second indication information.
  • the SCI associated with the second PSSCH may be the first-stage sidelink control information SCI1 or the sidelink control information SCI.
  • the design of SCI in different communication systems is different. In some communication systems, SCI is sent through PSCCH, in some communication systems, part of SCI is sent through PSCCH, and the remaining part of SCI is sent through PSSCH. For example, SCI1 is sent through PSCCH, and SCI2 is sent through PSCCH. Sent over PSSCH.
  • the method further includes: sending a first response message to the second terminal device, where the first response message is used to instruct the first terminal device to receive the first indication information .
  • the second terminal device if the second terminal device receives the first response message, it means that the first terminal device has received the first indication information, so the second terminal device can send the resource according to the resources included in the candidate resource set indicated by the first indication information At least one first PSCCH.
  • the first response message is a first hybrid automatic repeat request message HARQ of the second PSSCH.
  • the receiving the first indication information includes: receiving an RRC connection establishment request message, where the RRC connection establishment request message includes the first indication information.
  • the first response message may be an RRC connection establishment response message. In this way, when the second terminal device receives the RRC connection establishment response message, it indicates that the first terminal device has received the first indication information, so the second terminal device can send at least one first indication information according to the resources included in the candidate resource set indicated by the first indication information. PSCCH.
  • the second terminal device sends the first indication information through the second PSSCH, when the first terminal device receives the second PSSCH, it can send the first HARQ of the second PSSCH to the second terminal device.
  • the terminal device may determine that the first terminal device has received the first indication information according to the first HARQ, so the second terminal device may send at least one first PSCCH according to the resources included in the candidate resource set indicated by the first indication information.
  • the receiving the first indication information includes: receiving a physical sidelink broadcast channel PSBCH, where the PSBCH includes the first indication information.
  • the second terminal device may send a PSBCH, where the PSBCH carries the first indication information.
  • the second terminal device may send a sidelink synchronization signal block S-SSB, and the PSBCH in the S-SSB carries the first indication information.
  • the receiving the first indication information includes: receiving the first indication information on a preconfigured candidate resource or a candidate resource configured by a network device.
  • the second terminal device may send the first indication information on the preconfigured candidate resources, and the first terminal device may receive the first indication information on the preconfigured candidate resources; or, the second terminal device may The first indication information is sent on the candidate resources configured by the device, and the first terminal device can receive the first indication information on the candidate resources configured by the network device, so that the situation that the first terminal device cannot receive the first indication information can be avoided.
  • the bandwidth of the preconfigured candidate resource is smaller than the first bandwidth preset value, or the number of subchannels of the preconfigured candidate resource is smaller than the first channel preset value, so that when the second terminal device is in the preconfigured candidate resource
  • the first terminal device can reduce the overhead of blind detection; optionally, the bandwidth of the candidate resources configured by the network device is smaller than the first indication information.
  • a bandwidth preset value, or the number of sub-channels of the preconfigured resources is less than the first channel preset value. In this way, when the second terminal device sends the first indication information on the candidate resources configured by the network device, the first terminal device will In the process of detecting the first indication information on the candidate resources configured by the network device, the overhead of blind detection can be reduced.
  • the detecting the first PSCCH according to the resources included in the candidate resource set indicated by the first indication information includes: determining the resource in the candidate resource set indicated by the first indication information. There is an intersection resource between the resource and the resource in the first perception window; the first PSCCH is detected on the intersected resource.
  • the first terminal device can determine the first perception window.
  • the first terminal device may determine the intersection of the first sensing window and the resources included in the candidate resource set indicated by the first indication information, and detect the first PSCCH on the resources where the intersection exists.
  • a second aspect provides a method for detecting PSCCH, the method is applicable to a second terminal device, and sends first indication information, where the first indication information is used to indicate a candidate resource set, and the candidate resource set includes The resource is a candidate resource for the second terminal equipment to send PSCCH; at least one first PSCCH is sent according to the resource included in the candidate resource set indicated by the first indication information.
  • the second terminal device may send at least one first PSCCH according to the resources included in the candidate resource set indicated by the first indication information, and the first terminal device may detect the first PSCCH according to the resources included in the candidate resource set indicated by the first indication information.
  • One PSCCH reduces the overhead caused by the first terminal device needing to blindly detect the PSCCH, which is beneficial to reducing energy consumption.
  • the first terminal device when the RSRP of the first indication information received by the first terminal device is greater than the first RSRP threshold, the first terminal device The first PSCCH can be detected according to the resources included in the candidate resource set. Especially when the bandwidth is relatively large or there are many sub-channels, the overhead caused by the need for the first terminal device to blindly detect the PSCCH can be reduced.
  • the first indication information is further used to indicate the first service priority.
  • the first service priority is the priority of the service.
  • the first service priority may be the priority corresponding to the service with the highest priority among the multiple services.
  • the first service priority may be a priority corresponding to any one of the multiple services.
  • the first service priority indicated by the first indication information is used for the first terminal device to determine the first RSRP threshold.
  • the first indication information is further used to indicate a target address, and the target address indicated by the first indication information is an address corresponding to a service; the method further includes: according to the at least one first indication A PSCCH transmits at least one physical sidelink shared channel PSSCH associated with the at least one first PSCCH.
  • the target address indicated by the first indication information may be the target ID of the first service at layer 2 determined by the second terminal device, and the target address of a service existing in the first terminal device may be the first terminal device existing in the first terminal device.
  • the first PSSCH associated with the first PSCCH may be the PSSCH corresponding to the first service.
  • the method includes: sending radio resource control RRC signaling through the second PSSCH, where the RRC signaling carries the first indication information.
  • a medium access control layer unit MAC CE is sent through the second PSSCH, and the MAC CE carries the first indication information.
  • the second-stage sidelink control information SCI2 is sent through the second PSSCH, and the SCI2 carries the first indication information.
  • the method further includes: sending sidelink control information SCI associated with the second PSSCH, where the SCI includes second indication information, and the second indication information is used to indicate the The second PSSCH carries the first indication information.
  • the method further includes: receiving a first response message, where the first response message is used to instruct the first terminal device to receive the first indication information.
  • the first response message is a first hybrid automatic repeat request message HARQ of the second PSSCH.
  • the sending the first indication information includes: sending an RRC connection establishment request message, where the RRC connection establishment request message includes the first indication information.
  • the first response message may be an RRC connection establishment response message. In this way, when the second terminal device receives the RRC connection establishment response message, it indicates that the first terminal device has received the first indication information, so the second terminal device can send at least one first indication information according to the resources included in the candidate resource set indicated by the first indication information. PSCCH.
  • the sending the first indication information includes: sending a physical sidelink broadcast channel PSBCH, where the PSBCH includes the first indication information.
  • the sending the first indication information includes: sending the first indication information according to a preconfigured candidate resource or a candidate resource configured by a network device.
  • the sending of the first indication information according to the preconfigured candidate resources or the candidate resources configured by the network device includes:
  • the first indication information is sent according to the reserved resources in the second selection window and the candidate resources configured by the network device.
  • the second terminal device when the second terminal device needs to send the first indication information, it can determine the second sensing window and the second selection window.
  • the second terminal device may receive at least one second PSCCH in the second sensing window, and the control information carried by the at least one second PSCCH is used to indicate resources reserved in the second selection window.
  • the second terminal device sends the first indication information according to the reserved resources in the second selection window, and the preconfigured candidate resources or the candidate resources configured by the network device.
  • the second terminal device may avoid resources in the second selection window reserved by at least one second PSCCH when selecting resources from the preconfigured candidate resources or the candidate resources configured by the network device, in other words, if At least one resource reserved by the second PSCCH in the second selection window just has an intersection with the preconfigured candidate resource or the candidate resource configured by the network device, then the second terminal device selects the preconfigured candidate resource or the candidate resource configured by the network device When sending the resources of the first indication information, it is necessary to avoid the resources that have the intersection. It is beneficial to reduce interference and improve the possibility of successfully sending the first indication information.
  • the sending at least one first PSCCH according to the resources included in the candidate resource set indicated by the first indication information includes:
  • the at least one first PSCCH is sent on the intersecting resources.
  • the first terminal device can determine the first perception window.
  • the first terminal device may determine the intersection of the first sensing window and the resources included in the candidate resource set indicated by the first indication information, and detect the first PSCCH on the resources where the intersection exists.
  • an apparatus for detecting PSCCH is provided, and the apparatus is configured to execute the method in any possible implementation manner of the above-mentioned first aspect.
  • the apparatus may include a processing unit and a transceiving unit.
  • the transceiver unit can communicate with the outside, and the processing unit is used for data processing.
  • the transceiver unit may also be referred to as a communication interface or a communication unit.
  • the apparatus may be configured to perform the action performed by the first terminal device in any possible implementation manner of the first aspect.
  • the apparatus may be referred to as the first terminal device, and the transceiver unit is configured to perform any one of the first aspect.
  • the processing unit is configured to perform a processing-related operation on the first terminal device side in any possible implementation manner of the first aspect.
  • the transceiver unit is configured to receive first indication information, where the first indication information is used to indicate a candidate resource set, and the resources included in the candidate resource set are candidate resources for sending PSCCH by the second terminal device; if receiving the The reference signal received power RSRP corresponding to the first indication information is greater than the first RSRP threshold, and the processing unit is configured to control the transceiving unit to detect the first PSCCH according to the resources included in the candidate resource set indicated by the first indication information.
  • the first RSRP threshold is preset or configured by a network device.
  • the first indication information is further used to indicate a first service priority; the processing unit is used for: according to the first service priority and the second service of the first terminal device The priority determines the first RSRP threshold, or the first RSRP threshold is determined according to the first service priority.
  • the first indication information is further used to indicate a target address
  • the target address indicated by the first indication information is an address corresponding to a service
  • the processing unit is specifically configured to control the transceiver unit : if the target address of a service that exists in the first terminal device is the same as the target address indicated by the first indication information, the first PSCCH is detected according to the resources included in the candidate resource set indicated by the first indication information;
  • the transceiver unit is further configured to receive, according to the first PSCCH, a first physical sidelink shared channel PSSCH associated with the first PSCCH.
  • the transceiver unit is further configured to: receive radio resource control RRC signaling through the second PSSCH, where the RRC signaling carries the first indication information; or,
  • a medium access control layer unit MAC CE is received through the second PSSCH, where the MAC CE carries the first indication information; or,
  • the second-stage sidelink control information SCI2 is received through the second PSSCH, and the SCI2 carries the first indication information.
  • the transceiver unit is further configured to: receive sidelink control information SCI associated with the second PSSCH, where the SCI includes second indication information, and the second indication information is used for Indicates that the second PSSCH carries the first indication information.
  • the transceiver unit is specifically configured to: receive a physical sidelink broadcast channel PSBCH, where the PSBCH includes the first indication information.
  • the transceiver unit is specifically configured to include: receiving the first indication information on a preconfigured candidate resource or a candidate resource configured by a network device.
  • the processing unit is used to:
  • the transceiver unit is configured to detect the first PSCCH on the intersected resource.
  • an apparatus for detecting PSCCH is provided, and the apparatus is configured to execute the method in any possible implementation manner of the second aspect.
  • the apparatus may include a processing unit and a transceiving unit.
  • the transceiver unit can communicate with the outside, and the processing unit is used for data processing.
  • the transceiver unit may also be referred to as a communication interface or a communication unit.
  • the apparatus may be used to perform the actions performed by the terminal device in any possible implementation manner of the second aspect.
  • the apparatus may be referred to as a terminal device, and the transceiver unit is configured to perform any possible implementation manner of the second aspect.
  • the processing unit is configured to perform the operations related to the processing on the terminal device side in any possible implementation manner of the second aspect.
  • the transceiver unit is configured to send first indication information, where the first indication information is used to indicate a candidate resource set, and the resources included in the candidate resource set are candidate resources for sending PSCCH by the second terminal device; the The transceiver unit is further configured to send at least one first PSCCH according to the resources included in the candidate resource set indicated by the first indication information.
  • the first indication information is further used to indicate the first service priority.
  • the first indication information is further used to indicate a target address, and the target address indicated by the first indication information is an address corresponding to a service; the transceiver unit is further configured to:
  • the at least one physical sidelink shared channel PSSCH associated with the at least one first PSCCH is sent according to the at least one first PSCCH.
  • the transceiver unit is further configured to:
  • the second-stage sidelink control information SCI2 is sent through the second PSSCH, where the SCI2 carries the first indication information.
  • the transceiver unit is further configured to: send sidelink control information SCI associated with the second PSSCH, where the SCI includes second indication information, and the second indication information is used for Indicates that the second PSSCH carries the first indication information.
  • the transceiver unit is specifically configured to: send a physical sidelink broadcast channel PSBCH, where the PSBCH includes the first indication information.
  • the transceiver unit is specifically configured to: send the first indication information according to a preconfigured candidate resource or a candidate resource configured by a network device.
  • the transceiver unit is used for:
  • the processing unit is configured to determine resources in the reserved second selection window according to the at least one second PSCCH;
  • the transceiver unit is used for:
  • the first indication information is sent according to the reserved resources in the second selection window and the candidate resources configured by the network device.
  • the processing unit is configured to: determine the resources included in the candidate resource set indicated by the first indication information that have an intersection with the resources in the first selection window;
  • the transceiving unit is configured to send the at least one first PSCCH on the intersecting resource.
  • a fifth aspect provides a communication device comprising a processor and a memory, the processor is coupled to the memory, the memory is used to store computer programs or instructions, and the processor is used to execute the computer programs or instructions stored in the memory, so that the above-mentioned first A method in an aspect or in any possible implementation of the first aspect is performed.
  • the processor is configured to execute computer programs or instructions stored in the memory, so that the communication apparatus performs the method in the first aspect or any possible implementation manner of the first aspect.
  • the apparatus includes one or more processors.
  • the apparatus may further include a memory coupled to the processor.
  • the device may include one or more memories.
  • the memory may be integrated with the processor, or provided separately.
  • the device may also include a transceiver.
  • a sixth aspect provides a communication device comprising a processor and a memory, the processor is coupled to the memory, the memory is used for storing computer programs or instructions, and the processor is used for executing the computer programs or instructions stored in the memory, so that the above-mentioned second The method of any possible implementation of the aspect or the second aspect is performed.
  • the processor is configured to execute the computer program or instructions stored in the memory, so that the communication apparatus executes the method in the above-mentioned second aspect or any possible implementation manner of the second aspect.
  • the apparatus includes one or more processors.
  • the apparatus may further include a memory coupled to the processor.
  • the device may include one or more memories.
  • the memory may be integrated with the processor, or provided separately.
  • the device may also include a transceiver.
  • a communication system in a seventh aspect, includes the communication device in the third aspect or any possible implementation manner of the third aspect, and the fourth aspect or any possible implementation of the fourth aspect or, the communication system includes the communication device in the fifth aspect or any possible implementation manner of the fifth aspect, and, in the sixth aspect or any possible implementation manner of the sixth aspect communication device.
  • a computer-readable storage medium on which a computer program (also referred to as instructions or codes) for implementing the method in the first aspect or any possible implementation manner of the first aspect is stored.
  • the computer program when executed by a computer, enables the computer to perform the method of the first aspect or any possible implementation of the first aspect.
  • the computer may be a communication device.
  • a computer-readable storage medium on which is stored a computer program (also referred to as instructions or codes) for implementing the method in the second aspect or any possible implementation manner of the second aspect.
  • the computer program when executed by a computer, causes the computer to perform the method of the second aspect or any possible implementation of the second aspect.
  • the computer may be a communication device.
  • the present application provides a chip including a processor.
  • the processor is adapted to read and execute the computer program stored in the memory to perform the method of the first aspect and any possible implementations thereof.
  • the chip further includes a memory, and the memory and the processor are connected to the memory through a circuit or a wire.
  • the chip further includes a communication interface.
  • the present application provides a chip including a processor.
  • the processor is adapted to read and execute the computer program stored in the memory to perform the method of the second aspect and any possible implementations thereof.
  • the chip further includes a memory, and the memory and the processor are connected to the memory through a circuit or a wire.
  • the chip further includes a communication interface.
  • the present application provides a computer program product, the computer program product comprising a computer program (also referred to as instructions or codes), which, when executed by a computer, causes the computer to implement the first aspect or the first aspect.
  • a computer program also referred to as instructions or codes
  • the present application provides a computer program product, the computer program product comprising a computer program (also referred to as instructions or codes), which when executed by a computer causes the computer to implement the second aspect or the first The method in any possible implementation manner of the second aspect.
  • a computer program also referred to as instructions or codes
  • the present application provides a communication device, including a unit for implementing the method described in any embodiment of the present application.
  • FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a method for detecting PSCCH provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a second perception window and a second selection window provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of reserved resources in a second perception window and a second selection window provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an S-SSB provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another method for detecting PSCCH provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another method for detecting PSCCH provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a communication apparatus for detecting PSCCH provided by an embodiment of the present application.
  • FIG. 1 is a schematic diagram of an inter-device communication system 100 .
  • the wireless communication device may include one or more network devices, such as network device 110 in FIG. 1 . Both the terminal device 121 and the terminal device 122 can communicate with the network device 110 .
  • the network device 110 communicates with the terminal device 121 .
  • the link through which the terminal device 121 sends data to the network device 110 is called an uplink, and the link through which the terminal device 121 receives data sent by the network device 110 is called a downlink.
  • the wireless communication system 100 may further include a plurality of terminal devices, for example, the terminal device 121 and the terminal device 122 in FIG. 1 .
  • the terminal device 121 and the terminal device 122 can communicate directly.
  • the link for transmitting data between the terminal device 121 and the terminal device 122 is called a sidelink.
  • the terminal device 121 may send data to the terminal device 122 through the side link
  • the terminal device 122 may send data to the terminal device 121 through the side link.
  • Sidelinks are generally used in vehicle-to-everything (V2X) or device-to-device (D2D) scenarios where direct communication between devices is possible.
  • V2X communication can be regarded as a special case of D2D communication.
  • the new radio (NR) access technology is the current mainstream wireless communication technology. It can support V2X communication with lower latency and higher reliability in view of V2X service characteristics and new service requirements.
  • V2X is the foundation and key technology for realizing smart cars, autonomous driving, and intelligent transportation systems.
  • V2X can include vehicle to network (V2N), vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P), etc.
  • V2N communication is the most widely used form of Internet of Vehicles at present. Its main function is to connect the vehicle to the cloud server through the mobile network, and use the navigation, entertainment, anti-theft and other application functions provided by the cloud server.
  • V2V communication can be used for information exchange and reminders between vehicles, and the most typical application is for collision avoidance safety systems between vehicles.
  • V2I communication vehicles can communicate with roads and even other infrastructure, such as traffic lights, roadblocks, etc., to obtain road management information such as traffic light signal timing.
  • V2P communication can be used for safety warnings to pedestrians or non-motor vehicles on the road.
  • the terminal device 121 or the terminal device 122 may be fixed or movable.
  • Fig. 1 is only a schematic diagram, the communication system may also include other network devices, such as a wireless relay device and a wireless backhaul device, which are not shown in Fig. 1 .
  • the embodiments of the present application do not limit the types and quantities of network devices and terminal devices included in the mobile communication system.
  • the terminal device 121 or the terminal device 122 is wirelessly connected to a network device in the mobile communication system.
  • the network device 101 may be: a base station, an evolved node B (eNB), a home base station, an access point (AP) in a wireless fidelity (wireless fidelity, WIFI) system, a wireless relay node, A wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc., can also be a gNB in the NR system, or can also be a component or part of a device that constitutes a base station, such as Convergence unit (central unit, CU), distributed unit (distributed unit, DU) or baseband unit (baseband unit, BBU) and so on.
  • Convergence unit central unit, CU
  • distributed unit distributed unit
  • DU baseband unit
  • BBU baseband unit
  • the terminal device 121 or the terminal device 122 in the mobile communication system 100 may also be referred to as a terminal, a user equipment (UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT), and the like.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, and may also be applied to virtual reality (VR), augmented reality (AR) ), industrial control, self driving, remote medical, smart grid, transportation safety, smart city and smart home ) in scenarios such as wireless terminals.
  • the aforementioned terminal devices and chips applicable to the aforementioned terminal devices are collectively referred to as terminal devices. It should be understood that the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.
  • FIG. 1 is only for the convenience of understanding, and schematically shows the terminal device 121, the terminal device 122, and the network device 110, but this should not constitute any limitation to the present application, and the wireless communication system may also have a larger number of
  • the network device may also include more or less terminal devices, which is not limited in this application.
  • the resources through which the terminal device 121 communicates with the terminal device 122 may be resources allocated by the network device 110, or may be resources selected spontaneously in a preset resource pool. If the terminal device 121 and the terminal device 122 are within the coverage of the network device 110, the resources used by the terminal device 121 to communicate with the terminal device 122 may be resources allocated by the network device 110 or may be selected spontaneously in a preset resource pool resource. If the terminal device 121 or the terminal device 122 is not within the coverage of the network device 110, the resources for the terminal device 121 to communicate with the terminal device 122 are resources that are automatically selected in the preset resource pool.
  • the terminal device 121 sends the PSCCH to the terminal device 122 through the resources selected spontaneously in the preset resource pool, and the terminal device 122 needs to perform blind detection in the preset resource pool to receive the PSCCH sent by the terminal device 121 . If the bandwidth of the resources in the preset resource pool is relatively large or the corresponding sub-channels are relatively large, the blind detection overhead of the terminal device 122 is relatively high, and the energy consumption of the terminal device 122 is relatively high.
  • the following description takes the first terminal device as the terminal device 122 and the second terminal device as the terminal device 121 as an example.
  • the second terminal device may send first indication information, where the first indication information is used to instruct the second terminal device to send the PSCCH candidate resource set, and the first terminal device receives the first indication information Afterwards, the PSCCH sent by the second terminal device can be received on the candidate resource set indicated by the first indication information, thereby avoiding the overhead caused by the first terminal device needing to blindly detect the PSCCH on all resources in the preset resource pool.
  • the method 200 includes:
  • the second terminal device sends first indication information, and the first terminal device receives the first indication information.
  • the first indication information is used to indicate at least one of a candidate resource set, a first service priority, and a target address.
  • the destination address is an address corresponding to the service of the second terminal device.
  • the resources included in the candidate resource set are candidate resources for sending the PSCCH by the second terminal device.
  • the set of candidate resources includes one or more resources.
  • one or more resources included in the candidate resource set may be one or more frequency domain resources, or may be one or more time domain resources, or may be one or more time-frequency domain resources.
  • the candidate resource set in S201 may be preconfigured or configured by a network device.
  • the candidate resource set in S201 may be determined by the second terminal device.
  • the second terminal device may select one or more sub-channels with better channel conditions as the frequency domain resources included in the candidate resource set.
  • the second terminal device may select one or more time slots as time domain resources included in the candidate resource set according to the period of the first service of the second terminal device.
  • the second terminal device may support one or more services.
  • the first indication information may further indicate the first service priority.
  • the first service priority is the priority of the service.
  • the first service priority may be the priority corresponding to the service with the highest priority among the multiple services.
  • the first service priority may be a priority corresponding to any one of the multiple services.
  • any one of the one or more services supported by the second terminal device may be a unicast service, a broadcast service or a multicast service.
  • the target address of the first service may be that the second terminal device needs to send data, and the data of the first service needs to be sent to the target address.
  • the target address can be the target ID of layer 2 of the destination of the first service, where layer 2 refers to medium access control (medium access control, MAC). ID obtains the target ID of layer 2, for example, the ID of layer 2 can be 24 bits.
  • the first indication information may further indicate the identity of the second terminal device.
  • one or more terminal devices can receive the first indication information, and the embodiments of the present application are only described by taking the first indication information received by the first terminal device as an example.
  • the first terminal device may send a first response message to the second terminal device, where the first response message indicates that the first terminal device has received the first indication information.
  • S202 is performed.
  • the second terminal device may periodically send the first indication information, and the cycle may be preset or configured by the network device.
  • the second terminal device if it needs to transmit data, it can send the first indication information.
  • the second terminal device may randomly send the first indication information. The implementation of this application does not impose any restrictions on the triggering conditions for the second terminal device to send the first indication information.
  • the first indication information is used to instruct the second terminal device to send at least one of a candidate resource set of the PSCCH, a first service priority, and a target address. It can be understood that, the second terminal device may also be instructed to send at least one item of the PSCCH candidate resource set, the first service priority, and the target address through different indication information.
  • the indication information that instructs the second terminal device to send at least one of the PSCCH candidate resource set, the first service priority, and the target address may be sent through different messages.
  • the indication information 1 is used to instruct the second terminal device to send the candidate resource set of the PSCCH
  • the indication information 2 is used to indicate the first service priority
  • the indication information 3 is used to indicate the target address.
  • Indication 1, Indication 2, and Indication 3 may be sent in one message, or Indication 1, Indication 2, and Indication 3 may be sent in different messages, for example, Indication 1 in message 1, Indication information 1 in message 2 Send indication information 2 in message 3, indication information 3 in message 3, or send two or three items of indication information 1, indication information 2 and indication information 3 in the same message.
  • the second terminal device may select a resource for sending the first indication information according to any one of the following manners.
  • the second terminal device may send the first indication information on a preconfigured candidate resource or a candidate resource configured by the network device, and the preconfigured candidate resource may be understood as a resource specified by a protocol.
  • the bandwidth of the preconfigured candidate resource is smaller than the first bandwidth preset value, or the number of subchannels of the preconfigured candidate resource is smaller than the first channel preset value, so that when the second terminal device is in the preconfigured candidate resource
  • the first terminal device can reduce the overhead of blind detection; optionally, the bandwidth of the candidate resources configured by the network device is smaller than the first indication information.
  • a bandwidth preset value, or the number of sub-channels of the preconfigured resource is less than the first channel preset value.
  • the preconfigured candidate resources may be narrowband resources, or the candidate resources configured by the network device may be referred to as narrowband resources.
  • both the first terminal device and the second terminal device may learn the preconfigured candidate resources, or may learn the candidate resources configured by the network device.
  • the second terminal device may send the first indication information on the preconfigured candidate resources or the candidate resources configured by the network device, and the first terminal device may receive the first indication on the preconfigured candidate resources or the candidate resources configured by the network device information.
  • the second terminal device may determine a second sensing window (sensing window) and a second selection window (selection window).
  • the second terminal device may receive at least one second PSCCH in the second sensing window, and the control information carried by the at least one second PSCCH is used to indicate resources reserved in the second selection window, and the second terminal device may be in the second selection window.
  • the reserved resources indicated by the control information carried by the at least one second PSCCH are avoided, which is beneficial to reduce interference, thereby improving the possibility of successful sending of the first indication information.
  • the bandwidth of the second sensing window determined by the second terminal device may be smaller than the second bandwidth preset value or the number of sub-channels of the second sensing window may be smaller than the second channel preset value, so that the second terminal can be saved.
  • the device receives the overhead of at least one second PSCCH.
  • the bandwidth of the second selection window determined by the second terminal device may be smaller than the third bandwidth preset value or the number of sub-channels of the second selection window may be smaller than the third sub-channel preset value, so that the first bandwidth can be saved.
  • the terminal device detects the overhead of the first indication information.
  • the second terminal device when determining the time n for sending the first indication information, may determine the second perception window and the second selection window according to the time n.
  • the second terminal device may be able to receive the PSCCH sent by other terminal devices in the second sensing window, and the control information carried in the PSCCH sent by the other terminal device is used to indicate resources reserved in the second selection window.
  • the second terminal device may determine the resources reserved in the second selection window indicated by the control information carried in the PSCCH sent by other terminal devices.
  • the second terminal device may be able to receive the PSCCH on some resources in the second sensing window, but may not receive the PSCCH on some resources.
  • the second terminal device measures and detects the PSCCH.
  • the RSRP of the received PSCCH or the RSRP of the PSSCH associated with the detected PSCCH is measured, and the second terminal device can determine the interference situation of the reserved resources indicated by the control information carried by the PSCCH in the second selection window according to the measured RSRP and the RSRP threshold , if the measured RSRP is greater than the RSRP threshold, it means that the interference of the reserved resources in the second selection window indicated by the control information carried by the PSCCH is too large, which means that the control information carried by the PSCCH in the second selection window indicates that the The reserved resources are unavailable.
  • the second terminal device may determine the resource for sending the first indication information according to the interference situation of the resource. For example, as shown in FIG.
  • the second terminal device receives the PSCCH sent by UE1, UE2 and UE3 on the three resources of the second sensing window, and the control information carried by the PSCCH sent by UE1, UE2 and UE3 respectively reserves the second Select three resources in the window, and the second terminal device measures the RSRP of the PSCCH sent by the three UEs detected in the second sensing window is greater than the RSRP threshold, when the second terminal device determines the resources for sending the first indication information, can The three resources in the second selection window reserved by UE1, UE2 and UE3 are avoided.
  • control information carried by the PSCCH may be SCI or SCI1.
  • the second terminal device may determine the second perception window and the second selection window.
  • the second terminal device may receive at least one second PSCCH in the second sensing window, and the control information carried by the at least one second PSCCH is used to indicate resources reserved in the second selection window.
  • the second terminal device sends the first indication information according to the reserved resources in the second selection window and the preconfigured candidate resources or the candidate resources configured by the network device.
  • the second terminal device may avoid resources in the second selection window reserved by at least one second PSCCH when selecting resources from the preconfigured candidate resources or the candidate resources configured by the network device, in other words, if At least one resource reserved by the second PSCCH in the second selection window just has an intersection with the preconfigured candidate resource or the candidate resource configured by the network device, then the second terminal device selects the preconfigured candidate resource or the candidate resource configured by the network device When sending the resources of the first indication information, it is necessary to avoid the resources that have the intersection. It is beneficial to reduce interference and improve the possibility of successfully sending the first indication information.
  • both the first terminal device and the second terminal device may learn the preconfigured candidate resources, or may learn the candidate resources configured by the network device.
  • the second terminal device can send the first indication information on the candidate resources that have the intersection, and the first terminal device can receive the first indication information on the preconfigured candidate resources or the candidate resources configured by the network device.
  • the bandwidth of the second sensing window determined by the second terminal device may be smaller than the second bandwidth preset value or the number of sub-channels of the second sensing window may be smaller than the second channel preset value, so that the second terminal can be saved.
  • the device detects the overhead of at least one second PSCCH.
  • the bandwidth of the second selection window determined by the second terminal device may be smaller than the third bandwidth preset value or the number of subchannels of the second selection window may be smaller than the third subchannel preset value, the preconfigured candidate resources or The bandwidth of the candidate resource configured by the network device is smaller than the first bandwidth preset value, or the number of subchannels of the preconfigured candidate resource or the candidate resource configured by the network device is smaller than the first channel preset value. In this way, the detection of the first terminal device can be saved.
  • the overhead of the first indication information may be smaller than the third bandwidth preset value or the number of subchannels of the second selection window may be smaller than the third subchannel preset value, the preconfigured candidate resources or The bandwidth of the
  • the second selection window and the second sensing window are shown in FIG. 3 .
  • the second terminal device may send the first indication information in any one of the following manners.
  • the second terminal device sends a physical sidelink broadcast channel (physical sidelink broadcast channel, PSBCH), and the PSBCH includes the first indication information.
  • PSBCH physical sidelink broadcast channel
  • the second terminal device may send a sidelink synchronization signal/physical broadcast channel block (sidelink synchronization system/physical broadcast channel block, S-SS/PBCH block).
  • the S-SS/PBCH block may be referred to as a sidelink synchronization signal block (S-SSB) for short, and the PSBCH in the S-SSB includes the first indication information.
  • S-SSB sidelink synchronization signal block
  • the schematic diagram of S-SSB is shown in Figure 5, including sidelink primary synchronization signal (S-PSS), sidelink secondary synchronization signal (S-SSS), PSBCH and Gap.
  • Manner 1 may be applicable to broadcast services.
  • the second terminal device may send the first indication information through a second physical sidelink shared channel (physical sidelink shared channel, PSSCH).
  • a second physical sidelink shared channel physical sidelink shared channel, PSSCH.
  • the first indication information may be carried in radio resource control (radio resource control, RRC) signaling
  • RRC radio resource control
  • the first indication information may be carried in a MAC control element (control element, CE), and the second terminal device may send the MAC CE carrying the first indication information through the second PSSCH.
  • CE control element
  • the first indication information may be carried in the second stage sidelink control information (sidelink control information, SCI2).
  • the second terminal device may send the SCI2 carrying the first indication information through the second PSSCH.
  • the first terminal device can send a first hybrid automatic repeat request (hybrid automatic repeat request, HARQ) message to the second terminal device, at this time , the aforementioned first response message may be the first HARQ message.
  • HARQ hybrid automatic repeat request
  • the second terminal device After the second terminal device receives the first HARQ message, it may be determined that the first terminal device has received the first indication information, so that S202 may be performed.
  • the second terminal device may also send second indication information, where the second indication information is used to indicate that the second PSSCH carries the first indication information.
  • the second PSSCH may carry a unicast identifier or a multicast identifier.
  • the first terminal device determines that the second PSSCH is sent to the first terminal device according to the unicast identifier or the multicast identifier in the second PSSCH. Therefore, the first terminal device can Parse the first indication information in the second PSSCH.
  • the fourth terminal device determines the second PSSCH according to the unicast identifier or the multicast identifier in the second PSSCH Not sent to the fourth terminal device.
  • the fourth terminal device may determine, according to the second indication information, that the second PSSCH carries the first indication information, so the fourth terminal device may determine according to the first indication information in the second PSSCH , determine the candidate resource set for the second terminal device to send the PSCCH, and the fourth terminal device may detect the first PSCCH according to the resources included in the candidate resource set (the first PSCCH may be the same as or different from the first PSCCH detected by the first terminal device) , in this way, the fourth terminal device can determine the resources reserved in the fourth selection window indicated by the control information carried by the first PSCCH according to the received first PSCCH, so that the fourth terminal device can avoid the first PSCCH carrying the resources when selecting resources.
  • the reserved resources indicated by the control information of that is to say, the purpose of sending the second indication information by the second terminal device is to make it possible to parse the first indication information in the second PSSCH regardless of whether it is the receiver of the second PSSCH.
  • the second terminal device may send the SCI associated with the second PSSCH, the SCI associated with the second PSSCH includes the second indication information, and the SCI associated with the second PSSCH may be the first-stage sidelink control information SCI1 or is the sidelink control information SCI.
  • the design of SCI in different communication systems is different. In some communication systems, SCI is sent through PSCCH, in some communication systems, part of SCI is sent through PSCCH, and the remaining part of SCI is sent through PSSCH. For example, SCI1 is sent through PSCCH, and SCI2 is sent through PSCCH. Sent over PSSCH.
  • the second terminal device may send the first indication information through the second PSSCH in a multicast or unicast manner.
  • the second method may be applicable to multicast or unicast services.
  • the first indication information indicates the first service priority, perform S202. Otherwise, execute S203 or execute S204.
  • the first terminal device determines a first reference signal receiving power (reference signal receiving power, RSRP) threshold according to the first service priority.
  • RSRP reference signal receiving power
  • the protocol can specify the relationship between the traffic priority and the RSRP threshold.
  • the first RSRP threshold corresponding to the first service priority may be determined according to the relationship between the service priority and the RSRP threshold.
  • the first terminal device may also determine the first RSRP threshold corresponding to the first service priority and the second service priority according to the relationship between the service priority and the RSRP threshold.
  • the second service priority is a priority corresponding to a service of the first terminal device.
  • the first terminal device may support one or more services.
  • the priority of the second service is the priority of the service.
  • the second service priority may be the priority corresponding to the service with the highest priority among the multiple services.
  • the second service priority may be a priority corresponding to any one of the multiple services.
  • the second service priority is a priority corresponding to a service to be transmitted by the first terminal device.
  • step S202 may not exist, that is, the first RSRP threshold may be preset.
  • the first indication information may indicate the first service priority, but the first terminal device does not perform S202, or the first indication information indicates the first service priority, but the first terminal device does not perform S202.
  • the first terminal device determines whether the RSRP received the first indication information is greater than the first RSRP threshold, and if it is greater than the first RSRP threshold, S204 is performed. Otherwise method 200 ends.
  • the RSRP for receiving the first indication information in S203 may be the RSRP for receiving the PSBCH.
  • the RSRP for receiving the first indication information in S203 may be the RSRP for receiving the PSBCH in the S-SSB.
  • the RSRP for receiving the first indication information in S203 may be the RSRP for receiving the second PSSCH, or the RSRP for receiving the PSCCH associated with the second PSSCH. RSRP.
  • the second terminal device sends at least one first PSCCH according to the resources included in the candidate resource set, and the first terminal device detects the first PSCCH according to the resources included in the candidate resource set.
  • the first PSCCH detected by the first terminal device according to the resources included in the candidate resource set may be one of the at least one first PSCCH, or may also be multiple of the at least one first PSCCH.
  • the detection of a PSCCH is described as an example.
  • the second terminal device may send at least one first PSCCH on some resources included in the candidate resource set, or may send at least one first PSCCH on all resources included in the candidate resource set.
  • the first terminal device may detect at least part of the first PSCCH in the at least one first PSCCH on part of the resources included in the candidate resource set.
  • the first terminal device may detect at least part of the first PSCCH in the at least one first PSCCH on all resources included in the candidate resource set.
  • the first terminal device may determine the first sensing window.
  • the first sensing window is similar to the second sensing window in FIG. 3 . In order to avoid redundant description, the first sensing window will not be described in detail.
  • the first terminal device may determine the intersection of the first sensing window and the resources included in the candidate resource set indicated by the first indication information, and detect the first PSCCH on the resources where the intersection exists.
  • the candidate resource set indicated by the first indication information includes resource 1, resource 2, and resource 3.
  • the first perception window includes resource 3 and resource 4, and the first terminal device detects the first PSCCH on resource 3.
  • the first terminal device sends the third PSCCH to the third terminal device according to the resources reserved in the third selection window indicated by the control information carried by the first PSCCH, and the third terminal device receives the third PSCCH.
  • the third selection window is a selection window corresponding to the first sensing window determined by the first terminal device. That is, the first terminal device can determine the resources reserved in the third selection window indicated by the control information carried by the first PSCCH through the first PSCCH detected in the first sensing window.
  • the first terminal device may avoid the resources reserved in the third selection window indicated by the control information carried by the first PSCCH.
  • the third selection window includes resource 5 and resource 6, and the control information carried in the first PSCCH indicates that resource 5 in the third selection window is reserved, then the first terminal device does not send the third PSCCH on resource 5, but The third PSCCH is sent on resource 6.
  • the first terminal device measures the detected RSRP of the first PSCCH or measures the detected RSRP of the PSSCH associated with the first PSCCH.
  • the measured RSRP is greater than the RSRP threshold, it indicates that the control information carried by the first PSCCH indicates that If the interference on resource 5 is too large, the first terminal device does not send the third PSCCH on resource 5, but sends the third PSCCH on resource 6.
  • the first indication information may indicate the target address or may not indicate the target address. If the first indication information indicates the target address, the first terminal device may not perform any processing.
  • the second terminal device in the method 200 may be different from or the same as the third terminal device, which is not limited in this embodiment of the present application.
  • the method 200 may include the three steps of S201, S204 and S205, excluding the steps of S202 and S203, that is, regardless of whether the first indication information indicates the target address or the first service priority, the first terminal device
  • the third PSCCH may be sent to the third terminal device according to the reserved resources indicated by the detected control information carried by the first PSCCH.
  • the second terminal device may send third indication information, where the third indication information indicates the updated candidate resource set for sending PSCCH.
  • the third indication information indicates the updated candidate resource set for sending PSCCH.
  • at least part of the PSSCH associated with the first PSCCH in the at least one first PSCCH in S204 may carry the third indication information, for example: the PSSCH associated with each first PSCCH in the at least one first PSCCH may carry the third indication information.
  • Indication information after the second terminal device sends at least one first PSCCH, it sends subsequent PSCCHs on the updated candidate resource set, so that the first terminal device that receives the first PSCCH can use the updated candidate resource set to receive the subsequent PSCCH.
  • the first terminal device may send the HARQ of the received PSSCH to the second terminal device, and the second terminal device determines according to the HARQ that the first terminal device has received the third indication. Therefore, the second terminal device can send the subsequent PSCCH according to the resources included in the updated candidate resource set, that is to say, the second terminal device needs to ensure that the first terminal device correctly receives the third indication information, The resources included in the candidate resource set send the subsequent PSCCH, so as to prevent the second terminal device from directly sending the subsequent PSCCH according to the updated candidate resource set. If the first terminal device does not receive the third indication information correctly, the first terminal device will continue to update The resources included in the previous candidate resource set receive the PSCCH, resulting in an error in receiving the PSCCH.
  • the third indication information is similar to the first indication information, and may also indicate a third service priority or another target address, which is not described in detail in this embodiment of the present application to avoid repetition.
  • the third service priority indicated by the third indication information may be the same as or different from the first service priority indicated by the first indication information.
  • another target address indicated by the third indication information may be the same as or different from the target address indicated by the first indication information.
  • the second terminal device sends first indication information, where the first indication information may indicate the candidate resource set and the first service priority, and the first terminal device determines the first RSRP threshold according to the first service priority.
  • the first terminal device detects the first PSCCH according to the candidate resource set, and sends a message to the third terminal device according to the resources in the third selection window reserved by the first PSCCH.
  • Sending the third PSCCH that is, the first terminal device can avoid the resources in the third selection window reserved by the first PSCCH in the process of sending the third PSCCH to the third terminal device, so that the transmission of the third PSSCH can be improved. success rate.
  • the first terminal device needs to send the third PSSCH to the third terminal device, that is, the behavior of the third PSSCH sent by the first terminal device.
  • the method 600 shown in FIG. 6 includes:
  • S601 is the same as S201.
  • the first terminal device determines whether there is a target address of a service that is the same as the target address indicated by the first indication information, and if they are the same, execute S603. Otherwise method 200 ends.
  • the first terminal device may determine whether the RSRP for receiving the first indication information is greater than the first RSRP threshold, and if the first terminal device determines that the RSRP for receiving the first indication information is greater than the first RSRP threshold If the RSRP is greater than the first RSRP threshold, S602 is executed. Or after S602, the first terminal device may determine whether the RSRP for receiving the first indication information is greater than the first RSRP threshold, and if the first terminal device determines that the RSRP for receiving the first indication information is greater than the first RSRP threshold, perform S603.
  • the first terminal device may determine the first RSRP threshold according to the first service priority, and the first terminal device may determine to receive the first indication information. Whether the RSRP of the first terminal device is greater than the first RSRP threshold, if the first terminal device determines that the RSRP for receiving the first indication information is greater than the first RSRP threshold, perform S602. Or after S602, the first terminal device may determine whether the RSRP for receiving the first indication information is greater than the first RSRP threshold, and if the first terminal device determines that the RSRP for receiving the first indication information is greater than the first RSRP threshold, perform S603.
  • the method 600 may consider whether the RSRP of the received first indication information is greater than the first RSRP threshold, and the first RSRP threshold may be preset or configured by the network device or determined by the first terminal device according to the first service priority .
  • the method 600 may also not consider the first RSRP threshold, which is not limited in this embodiment of the present application.
  • the first indication information may indicate the first service priority or may not indicate the first service priority. If the first indication information indicates the first service priority, the first terminal device may not perform any processing, The first RSRP threshold may also be determined according to the first service priority.
  • S603 is the same as S204.
  • the second terminal device sends at least one PSSCH associated with the at least one first PSCCH, and the first terminal device receives the first PSSCH according to the first PSCCH detected in S603.
  • one PSCCH can be associated with one PSSCH.
  • the first PSSCH is a PSSCH associated with the first PSCCH in at least one PSSCH.
  • the first PSCCH may indicate a resource for receiving the first PSSCH or a manner of decoding the first PSSCH, and the like, and the first terminal device may receive the first PSSCH according to the first PSCCH.
  • the first indication information may indicate the candidate resource set and the target address, and the first RSRP threshold may be configured or pre-configured by the network device. If the first terminal device determines that the target address indicated by the first indication information is the same as a target address of the first terminal device, the first terminal device determines that the second terminal device needs to send the PSSCH to the first terminal device. The terminal device may receive the first PSSCH associated with the first PSCCH according to the first PSCCH.
  • the first terminal device needs to send the third PSSCH to the third terminal device, that is, the behavior of the third PSSCH sent by the first terminal device.
  • Described in method 600 is the behavior of the first terminal device receiving the first PSSCH, the following method is described in conjunction with method 700, the first terminal device needs to send the third PSSCH to the third terminal device, and the first terminal device receives the behavior of the first PSSCH .
  • the method 700 shown in FIG. 7 includes:
  • S701 is the same as S201.
  • S702 is the same as S202.
  • the first terminal device determines whether the RSRP received the first indication information is greater than the first RSRP threshold, and if it is greater than the first RSRP threshold, execute S704. Otherwise method 700 ends.
  • the first RSRP threshold may be determined in S702 or configured by a network device or pre-configured, which is not limited in this embodiment of the present application. If the first RSRP threshold is configured or pre-configured by the network device, step S702 may not exist. That is, regardless of whether the first indication information indicates the first service priority, the first RSRP threshold in S703 may be configured or preset by the network device.
  • the first terminal device sends the third PSCCH to the third terminal device according to the resources reserved in the third selection window indicated by the control information carried by the first PSCCH, and the third terminal device receives the third PSCCH.
  • the first terminal device determines whether there is a target address of a service that is the same as the target address indicated by the first indication information, and if it is the same, executes S707. Otherwise method 700 ends.
  • the second terminal device sends at least one PSSCH associated with the at least one first PSCCH, and the first terminal device receives the first PSSCH according to the first PSCCH detected in S704.
  • one PSCCH can be associated with one PSSCH.
  • the first PSSCH is a PSSCH associated with the first PSCCH in at least one PSSCH.
  • the order of the various steps is not limited. If S702, S703, S704 and S705 are before S706 and S707, indicating that the first terminal device determines that the RSRP for receiving the first indication information is greater than the first RSRP threshold, the first terminal device can detect the first PSCCH according to the resources included in the candidate resource set . After detecting the first PSCCH, determine whether the second terminal device needs to transmit the PSSCH to the first terminal device according to the target address indicated by the first indication information. PSSCH.
  • the execution sequence can be: S701, S706, S704, S707, S702, S703, S705 (wherein, the sequence of S707 and S702 or S703 is not limited, and S707 can be executed before or after S702 or S703 or at the same time)
  • the first terminal device determines whether the second terminal device needs to transmit the PSSCH to the first terminal device according to the target address indicated by the first indication information. If there is a need to transmit the PSSCH, the first terminal device The resource detects the first PSCCH, and after detection, receives the first PSSCH according to the first PSCCH.
  • the first terminal device may send the third PSSCH to the third terminal device according to the resources in the third selection window reserved by the first PSCCH .
  • the execution sequence of the method 700 may also be: S701, S702, S703, S706, S704, S707, S705.
  • the execution sequence of the method 700 may also be: S701, S706, S702, S703, S704, S707, S705, that is, the first terminal device detects the first PSCCH only when both S703 and S706 are satisfied.
  • the first terminal device detects the first PSCCH. That is, in the method 700, the triggering condition for the first terminal device to detect the first PSCCH may be S703 or S706, and it is detected that the first PSCCH can not only receive the first PSSCH, but also send the third PSSCH.
  • the above method embodiments describe that the second terminal device sends the first indication information through the PSBCH or sends the first indication information through the second PSSCH, and the second terminal device may also send the first indication information through other messages.
  • the embodiments of the present application are not limited.
  • the second terminal device sends the first indication information.
  • the second terminal device sends the PSCCH on the resources included in the candidate resource set, and the first terminal device detects the PSCCH on the resources included in the candidate resource set indicated by the first indication information. That is to say, the second terminal device sends the PSCCH on the resources included in the candidate resource set indicated by the first indication information, and the first terminal device receives the PSCCH on the resources included in the candidate resource set indicated by the first indication information, so that blindness can be reduced. Detection overhead.
  • the second terminal device sends the first indication information.
  • the second terminal device sends the PSCCH on the resources included in the candidate resource set, and the first terminal device detects the PSCCH on the resources where the resources included in the candidate resource set indicated by the first indication information and the resources of the first perception window have an intersection. That is, the second terminal device sends the PSCCH on the resources included in the candidate resource set indicated by the first indication information, and the first terminal device receives the PSCCH in combination with the first sensing window and the candidate resources.
  • the second terminal device sends the first indication information.
  • the second terminal device sends the PSCCH on the resource where the resources included in the candidate resource set and the resources of the first selection window determined by the second terminal device have an intersection, and the first terminal device sends the PSCCH on the resource included in the candidate resource set indicated by the first indication information.
  • PSCCH is detected on the resource. That is, the second terminal device may refer to the resources in the candidate resource set and the resources in the first selection window when sending the PSCCH, and the first terminal device receives the PSCCH on the resources included in the candidate resource set indicated by the first indication information, thereby The overhead of blind detection can be reduced.
  • the second terminal device sends the first indication information.
  • the second terminal device sends the PSCCH on the resource where the resources included in the candidate resource set and the resources of the first selection window determined by the second terminal device have an intersection, and the first terminal device sends the PSCCH on the resource included in the candidate resource set indicated by the first indication information.
  • the PSCCH is detected on the resource where the resource and the resource of the first sensing window have an intersection. That is, the second terminal device may refer to the resources in the candidate resource set and the resources in the first selection window when sending the PSCCH, and the first terminal device receives the PSCCH in combination with the first sensing window and the candidate resources, thereby reducing the overhead of blind detection .
  • the first sensing window is determined by the first terminal device.
  • the first selection window is determined by the second terminal device.
  • the first perception window has nothing to do with the first selection window. That is, when the first terminal device needs to transmit data, it can determine the first sensing window, and determine the selection window corresponding to the first sensing window, for example, the third selection window corresponds to the first sensing window.
  • the second terminal device may determine a third sensing window, and determine a first selection window corresponding to the third sensing window.
  • sending the first indication information through the second PSSCH can be understood as that the second terminal device can send the first indication information by means of the second PSSCH, and the first indication information can be carried in the MAC CE or RRC sent through the second PSSCH.
  • the signaling or SCI2, or the first indication information may be carried in other information other than MAC CE or RRC signaling or SCI2, which is not limited in this embodiment of the present application.
  • execution order of the above method embodiments is not limited by the numbers, and the execution order can be determined according to the internal logic, and the execution order of the methods can be exchanged as long as there is no contradiction.
  • the methods and operations implemented by the terminal device in the above method embodiments may also be implemented by components (such as chips or circuits) that can be used in the terminal device, and the methods and operations implemented by the network device in the above method embodiments.
  • the operations may also be implemented by components (eg, chips or circuits) available to a network device.
  • FIG. 8 shows a communication apparatus 800 provided by an embodiment of the present application.
  • the communication device 800 includes a processor 810 and a transceiver 820 .
  • the processor 810 and the transceiver 820 communicate with each other through an internal connection path, and the processor 810 is configured to execute instructions to control the transceiver 820 to send and/or receive signals.
  • the communication apparatus 800 may further include a memory 830, and the memory 830 communicates with the processor 810 and the transceiver 820 through an internal connection path.
  • the memory 830 is used to store instructions, and the processor 810 can execute the instructions stored in the memory 830 .
  • the communication apparatus 800 is configured to implement various processes and steps corresponding to the first terminal device in the foregoing method embodiments.
  • the communication apparatus 800 is configured to implement various processes and steps corresponding to the second terminal device in the above method embodiments.
  • the communication apparatus 800 may specifically be the first terminal device or the second terminal device in the foregoing embodiment, and may also be a chip or a chip system.
  • the transceiver 820 may be a transceiver circuit of the chip, which is not limited herein.
  • the communication apparatus 800 may be configured to execute various steps and/or processes corresponding to the first terminal device or the second terminal device in the foregoing method embodiments.
  • the memory 830 may include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory.
  • the memory may also store device type information.
  • the processor 810 may be configured to execute the instructions stored in the memory, and when the processor 810 executes the instructions stored in the memory, the processor 810 is configured to execute the above-mentioned method implementation corresponding to the first terminal device or the second terminal device Examples of individual steps and/or processes.
  • each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the aforementioned processors may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components .
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • the methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the present application further provides a computer program product, the computer program product includes: computer program code, when the computer program code is run on a computer, the computer is made to execute the first method in the above method embodiment.
  • the computer program product includes: computer program code, when the computer program code is run on a computer, the computer is made to execute the first method in the above method embodiment.
  • the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores program codes, and when the program codes are run on a computer, the computer is made to execute the above method embodiments Each step or process performed by the first terminal device or the second terminal device in the above.
  • the present application further provides a communication system, which includes the aforementioned one or more first terminal devices and one or more second terminal devices.
  • the above-mentioned device embodiments and method embodiments are completely corresponding, and corresponding steps are performed by corresponding modules or units.
  • the communication unit transmits the steps of receiving or sending in the method embodiments.
  • Other steps may be performed by a processing unit (processor).
  • the functions of specific units may be based on corresponding method embodiments.
  • the number of processors may be one or more.
  • indication may include direct indication and indirect indication, as well as explicit indication and implicit indication.
  • the information indicated by a certain information is called the information to be indicated, and in the specific implementation process, there can be many ways to indicate the information to be indicated.
  • the information to be indicated can be directly indicated, such as indicating the information to be indicated itself. Or the index of the information to be indicated, etc.
  • the information to be indicated may also be indirectly indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance.
  • the indication of specific information can also be implemented by means of a pre-agreed (for example, a protocol stipulated) arrangement order of various information, so as to reduce the indication overhead to a certain extent.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • each functional unit may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented in software, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media.
  • the usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks (SSDs)), and the like.
  • the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本申请提供了一种用于检测PSCCH的方法和通信装置。该方法中第一终端设备可以根据第一指示信息指示的候选资源集合包括的资源检测第一PSCCH，避免第一终端设备需要盲检测PSCCH所带来的开销，有利于降低能耗。尤其是能避免在带宽比较大或者子信道比较多的情况下，第一终端设备需要盲检测PSCCH所带来的开销。

Description

用于检测PSCCH的方法和通信装置
本申请要求于2021年04月30日提交国家知识产权局、申请号为202110486059.6、申请名称为“一种通信方法、终端及网络设备”，以及，要求于2021年06月17日提交国家知识产权局、申请号为202110673919.7、申请名称为“用于检测PSCCH的方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地涉及通信领域中用于检测PSCCH的方法和通信装置。
背景技术
终端设备之间可以通过侧行链路(sidelink，SL)直接通信，与蜂窝通信相比通过SL通信能够降低传输时延，也能缓解蜂窝网络的负载。通过SL通信有两种资源分配方式，一种是网络设备分配用于SL通信的资源，另一种是终端设备在预配置的资源池中选择资源。如果终端设备处于网络设备的覆盖范围之内，终端设备可以利用网络设备分配的资源进行SL通信或者在预配置的资源池中选择资源进行SL通信。如果终端设备处于网络设备的覆盖范围之外，终端设备需要在预配置的资源池中选择资源。例如，终端设备可以在预配置的资源池中选择的资源上发送物理侧行链路控制信道(physical sidelink control channel，PSCCH)，接收PSCCH的终端设备需要在预配置的资源池中盲检测PSCCH，在预配置的资源池中的资源的带宽比较大或者对应的子信道比较多时，接收PSCCH的终端设备盲检测的开销比较大，从而导致功耗也比较大。
发明内容
本申请实施例提供了一种用于检测PSCCH的方法和通信装置，能够降低盲检测的开销，从而也能降低终端设备的功耗。
第一方面，提供了一种用于检测PSCCH的方法，该方法适用于第一终端设备，方法包括：接收第一指示信息，所述第一指示信息用于指示候选资源集合，所述候选资源集合包括的资源为第二终端设备发送PSCCH的候选资源；根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH。
在上述方案中，第一终端设备可以根据第一指示信息指示的候选资源集合包括的资源检测第一PSCCH，降低第一终端设备需要盲检测PSCCH所带来的开销，有利于降低能耗。尤其是在带宽比较大或者子信道比较多的情况下，可以降低第一终端设备需要盲检测PSCCH所带来的开销。
可选地，候选资源集合包括一个或多个资源。
可选地，候选资源集合包括的一个或多个资源可以是一个或多个频域资源，或者可以是一个或多个时域资源，或者可以是一个或多个时频域资源。
可选地，候选资源集合可以是预配置的或者是网络设备配置的。
可选地，候选资源集合可以是第二终端设备确定的。
可选地，根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH，包括：若接收所述第一指示信息对应的参考信号接收功率RSRP大于第一RSRP阈值，根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH。
在上述方案中，第一终端设备在接收第一指示信息的RSRP大于第一RSRP阈值的情况下，第一终端设备根据候选资源集合包括的资源检测第一PSCCH，这样，避免第一终端设备只要接收到第一指示信息就检测第一PSCCH的情形。换句话说，第一终端设备接收到第一指示信息之后，根据接收第一指示信息RSRP确定是否需要检测PSCCH，当接收第一指示信息的RSRP大于第一RSRP阈值，表示接收第一指示信息的信号强度较大，或者第一终端设备与第二终端设备的距离较近，如果第一终端设备是第二终端设备的目标接收设备，则第一终端设备检测第二终端设备发送的第一PSCCH能提高检测的成功率；如果第一终端设备是需要选择资源进行数据发送的其他设备，则第一终端设备与第二终端设备之间的干扰可能比较大，第一终端设备检测第二终端设备发送的第一PSCCH，可以规避第二终端设备选择的资源。
可选地，接收第一指示信息的RSRP可以为接收一个消息，该消息的RSRP可以为接收第一指示信息的RSRP，或者与该消息关联的消息的RSRP可以为接收第一指示信息的RSRP。
在一些可能的实现方式中，所述第一RSRP阈值为预设的或者网络设备配置的。
在一些可能的实现方式中，所述第一指示信息还用于指示第一业务优先级；所述方法还包括：根据所述第一业务优先级和所述第一终端设备的第二业务优先级确定所述第一RSRP阈值，或者，根据所述第一业务优先级确定所述第一RSRP阈值。
在上述方案中，不同的业务优先级对应的RSRP阈值不同。第一终端设备可以根据第一指示信息指示的第一业务优先级确定第一RSRP阈值。或者第一终端设备可以根据第一业务优先级和第一终端设备的第二业务优先级确定第一RSRP阈值。避免第一终端设备无法确定第一RSRP阈值的情形。
可选地，如果第二终端设备只支持一个业务，则第一业务优先级为该业务的优先级。可选地，如果第二终端设备支持多个业务，第一业务优先级可以为多个业务中优先级最高的业务对应的优先级。可选地，如果第二终端设备支持多个业务，第一业务优先级可以为多个业务中任一业务对应的优先级。
可选地，第一终端设备可以预设有业务优先级与RSRP阈值之间的对应关系。第一终端设备可以根据第一指示信息指示的第一业务优先级以及对应关系确定第一RSRP阈值，或者第一终端设备可以根据第一业务优先级、第二业务优先级以及对应关系确定第一RSRP阈值。
在一些可能的实现方式中，所述第一指示信息还用于指示目标地址，所述第一指示信息指示的目标地址是与业务对应的地址，所述根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH，包括：
若所述第一终端设备存在一个业务的目标地址与所述第一指示信息指示的目标地址相同，根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH；
所述方法还包括：
根据所述第一PSCCH接收与所述第一PSCCH关联的第一物理侧行链路共享信道PSSCH。
在上述方案中，若第一终端设备存在一个目的地址与第一指示信息指示的目标地址相同，表示发送第一指示信息的第二终端设备有与第一终端设备传输PSSCH的需求。因此，第一终端设备需要根据候选资源集合检测第一PSCCH，并从第二终端设备接收与第一PSCCH关联的第一PSSCH，为第一终端设备和第二终端设备传输第一PSSCH提供了可能。
可选地，第一指示信息指示的目标地址可以为第二终端设备确定的第一业务在层2的目标ID，第一终端设备存在一个业务的目标地址可以为第一终端设备存在的第一业务在层2的目标ID。与第一PSCCH关联的第一PSSCH可以为第一业务对应的PSSCH。
在一些可能的实现方式中，通过第二PSSCH接收无线资源控制RRC信令，所述RRC信令携带所述第一指示信息。
在上述方案中，第二终端设备可以通过第二PSSCH发送承载第一指示信息的RRC信令，第一终端设备可以通过第二PSSCH接收承载第一指示信息的RRC信令。
在一些可能的实现方式中，通过所述第二PSSCH接收媒体接入控制层单元MAC CE，所述MAC CE携带所述第一指示信息。
在上述方案中，第二终端设备可以通过第二PSSCH发送承载第一指示信息的MAC CE，第一终端设备可以通过第二PSSCH接收承载第一指示信息的MAC CE。
在一些可能的实现方式中，通过所述第二PSSCH接收第二阶段侧行链路控制信息SCI2，所述SCI2携带所述第一指示信息。
在上述方案中，第二终端设备可以通过第二PSSCH发送承载第一指示信息的SCI2，第一终端设备可以通过第二PSSCH接收承载第一指示信息的SCI2。
在一些可能的实现方式中，接收与所述第二PSSCH关联的侧行链路控制信息SCI，所述SCI包括第二指示信息，所述第二指示信息用于指示所述第二PSSCH承载有所述第一指示信息。
在上述方案中，第一终端设备可以根据第二PSSCH关联的SCI中携带的第二指示信息确定第二PSSCH承载有第一指示信息，这样，便于第一终端设备根据第二指示信息确定第二PSSCH中的第一指示信息。
可选地，与第二PSSCH关联的SCI可以为第一阶段侧行链路控制信息SCI1或者是侧行链路控制信息SCI。可选地，不同的通信系统中SCI的设计不同，在一些通信系统中SCI通过PSCCH发送，在一些通信系统中部分SCI通过PSCCH发送，剩余部分SCI通过PSSCH发送，例如，SCI1通过PSCCH发送，SCI2通过PSSCH发送。
在一些可能的实现方式中，所述方法还包括：向所述第二终端设备发送第一响应消息，所述第一响应消息用于指示所述第一终端设备接收到所述第一指示信息。
在上述方案中，若第二终端设备接收到第一响应消息，则表示第一终端设备接收到了第一指示信息，因此第二终端设备可以根据第一指示信息指示的候选资源集合包括的资源发送至少一个第一PSCCH。
在一些可能的实现方式中，所述第一响应消息为所述第二PSSCH的第一混合自动重传请求消息HARQ。
在一些可能的实现方式中，所述接收第一指示信息，包括：接收RRC连接建立请求 消息，RRC连接建立请求消息包括第一指示信息。在一些可能的实现方式中，第一响应消息可以为RRC连接建立响应消息。这样，当第二终端设备接收到RRC连接建立响应消息表示第一终端设备接收到了第一指示信息，因此第二终端设备可以根据第一指示信息指示的候选资源集合包括的资源发送至少一个第一PSCCH。
在上述方案中，如果第二终端设备通过第二PSSCH发送第一指示信息，当第一终端设备接收到第二PSSCH，可以向第二终端设备发送第二PSSCH的第一HARQ，这样，第二终端设备可以根据第一HARQ确定第一终端设备接收到了第一指示信息，因此第二终端设备可以根据第一指示信息指示的候选资源集合包括的资源发送至少一个第一PSCCH。
在一些可能的实现方式中，所述接收第一指示信息，包括：接收物理侧行链路广播信道PSBCH，所述PSBCH包括所述第一指示信息。
可选地，第二终端设备可以发送PSBCH，PSBCH携带第一指示信息。或者，第二终端设备可以发送侧行链路同步信号块S-SSB，S-SSB中的PSBCH携带第一指示信息。
在一些可能的实现方式中，所述接收第一指示信息，包括：在预配置的候选资源或者网络设备配置的候选资源上接收所述第一指示信息。
在上述方案中，第二终端设备可以在预配置的候选资源上发送第一指示信息，第一终端设备可以在预配置的候选资源上接收第一指示信息；或者，第二终端设备可以在网络设备配置的候选资源上发送第一指示信息，第一终端设备可以在网络设备配置的候选资源上接收第一指示信息，这样，可以避免第一终端设备无法接收第一指示信息的情形。
可选地，预配置的候选资源的带宽小于第一带宽预设值，或者预配置的候选资源的子信道数量小于第一信道预设值，这样，当第二终端设备在预配置的候选资源上发送第一指示信息时，第一终端设备在预配置的候选资源上检测第一指示信息的过程中，可以减小盲检测的开销；可选地，网络设备配置的候选资源的带宽小于第一带宽预设值，或者预配置的资源的子信道数量小于第一信道预设值，这样，当第二终端设备在网络设备配置的候选资源上发送第一指示信息时，第一终端设备在网络设备配置的候选资源上检测第一指示信息过程中，可以减小盲检测的开销。
在一些可能的实现方式中，所述根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH，包括：确定所述第一指示信息指示的所述候选资源集合中的资源与第一感知窗口中的资源存在交集的资源；在所述存在交集的资源上检测所述第一PSCCH。
在上述方案中，若第一终端设备有传输数据的需求，则第一终端设备可以确定第一感知窗口。第一终端设备可以确定第一感知窗口与第一指示信息指示的候选资源集合包括的资源的交集，在存在交集的资源上检测第一PSCCH。
第二方面，提供了一种用于检测PSCCH的方法，所述方法适用于第二终端设备，发送第一指示信息，所述第一指示信息用于指示候选资源集合，所述候选资源集合包括的资源为所述第二终端设备发送PSCCH的候选资源；根据所述第一指示信息指示的所述候选资源集合包括的资源发送至少一个第一PSCCH。
在上述方案中，第二终端设备可以根据第一指示信息指示的候选资源集合包括的资源发送至少一个第一PSCCH，第一终端设备可以根据第一指示信息指示的候选资源集合包括的资源检测第一PSCCH，降低第一终端设备需要盲检测PSCCH所带来的开销，有利于降低能耗。
可选地，第二终端设备根据所述候选资源集合包括的资源发送的至少一个第一PSCCH，在第一终端设备接收第一指示信息的RSRP大于第一RSRP阈值的情况下，第一终端设备能根据候选资源集合包括的资源检测到第一PSCCH。尤其是在带宽比较大或者子信道比较多的情况下，可以降低第一终端设备需要盲检测PSCCH所带来的开销。
在一些可能的实现方式中，所述第一指示信息还用于指示第一业务优先级。
可选地，如果第二终端设备只支持一个业务，则第一业务优先级为该业务的优先级。可选地，如果第二终端设备支持多个业务，第一业务优先级可以为多个业务中优先级最高的业务对应的优先级。可选地，如果第二终端设备支持多个业务，第一业务优先级可以为多个业务中任一业务对应的优先级。
可选地，第一指示信息指示的第一业务优先级用于第一终端设备确定第一RSRP阈值。
在一些可能的实现方式中，所述第一指示信息还用于指示目标地址，所述第一指示信息指示的目标地址是与业务对应的地址；所述方法还包括：根据所述至少一个第一PSCCH发送所述至少一个第一PSCCH关联的至少一个物理侧行链路共享信道PSSCH。
可选地，第一指示信息指示的目标地址可以为第二终端设备确定的第一业务在层2的目标ID，第一终端设备存在一个业务的目标地址可以为第一终端设备存在的第一业务在层2的目标ID。与第一PSCCH关联的第一PSSCH可以为第一业务对应的PSSCH。
在一些可能的实现方式中，包括：通过第二PSSCH发送无线资源控制RRC信令，所述RRC信令携带所述第一指示信息。
在一些可能的实现方式中，通过第二PSSCH发送媒体接入控制层单元MAC CE，所述MAC CE携带所述第一指示信息。
在一些可能的实现方式中，通过第二PSSCH发送第二阶段侧行链路控制信息SCI2，所述SCI2携带所述第一指示信息。
在一些可能的实现方式中，所述方法还包括：发送与所述第二PSSCH关联的侧行链路控制信息SCI，所述SCI包括第二指示信息，所述第二指示信息用于指示所述第二PSSCH承载有所述第一指示信息。
在一些可能的实现方式中，所述方法还包括：接收第一响应消息，所述第一响应消息用于指示所述第一终端设备接收到所述第一指示信息。
在一些可能的实现方式中，所述第一响应消息为所述第二PSSCH的第一混合自动重传请求消息HARQ。
在一些可能的实现方式中，所述发送第一指示信息，包括：发送RRC连接建立请求消息，RRC连接建立请求消息包括第一指示信息。在一些可能的实现方式中，第一响应消息可以为RRC连接建立响应消息。这样，当第二终端设备接收到RRC连接建立响应消息表示第一终端设备接收到了第一指示信息，因此第二终端设备可以根据第一指示信息指示的候选资源集合包括的资源发送至少一个第一PSCCH。
在一些可能的实现方式中，所述发送第一指示信息，包括：发送物理侧行链路广播信道PSBCH，所述PSBCH包括所述第一指示信息。
在一些可能的实现方式中，所述发送第一指示信息，包括：根据预配置的候选资源或者网络设备配置的候选资源发送所述第一指示信息。
在一些可能的实现方式中，所述根据预配置的候选资源或者网络设备配置的候选资源 发送第一指示信息，包括：
在第二感知窗口中接收至少一个第二PSCCH；根据所述至少一个第二PSCCH确定预留的第二选择窗口中的资源；
根据所述预留的所述第二选择窗口中的资源，以及，所述预配置的候选资源发送所述第一指示信息，或者；
根据所述预留的所述第二选择窗口中的资源，以及，所述网络设备配置的候选资源发送所述第一指示信息。
在上述方案中，第二终端设备有发送第一指示信息的需求时，可以确定第二感知窗口和第二选择窗口。第二终端设备可以在第二感知窗口中接收至少一个第二PSCCH，至少一个第二PSCCH携带的控制信息用于指示在第二选择窗口中预留的资源。第二终端设备根据预留的第二选择窗口中的资源，以及，预配置的候选资源或者网络设备配置的候选资源发送第一指示信息。可选地，第二终端设备可以在预配置的候选资源或者网络设备配置的候选资源中选择资源时，避开至少一个第二PSCCH预留的第二选择窗口中的资源，换句话说，如果第二选择窗口中至少一个第二PSCCH预留的资源刚好与预配置的候选资源或者网络设备配置的候选资源存在交集，则第二终端设备在预配置的候选资源或者网络设备配置的候选资源选择发送第一指示信息的资源时，需要避开存在交集的资源。有利于降低干扰，提高发送第一指示信息成功的可能性。
在一些可能的实现方式中，所述根据所述第一指示信息指示的所述候选资源集合包括的资源发送至少一个第一PSCCH，包括：
确定所述第一指示信息指示的所述候选资源集合包括的资源与第一选择窗口中的资源存在交集的资源；
在所述存在交集的资源上发送所述至少一个第一PSCCH。
在上述方案中，若第一终端设备有传输数据的需求，则第一终端设备可以确定第一感知窗口。第一终端设备可以确定第一感知窗口与第一指示信息指示的候选资源集合包括的资源的交集，在存在交集的资源上检测第一PSCCH。
第三方面，提供一种用于检测PSCCH的装置，装置用于执行上述第一方面的任一可能的实现方式中的方法。具体地，装置可以包括处理单元和收发单元。收发单元可以与外部进行通信，处理单元用于进行数据处理。收发单元还可以称为通信接口或通信单元。
该装置可以用于执行第一方面的任一可能的实现方式中第一终端设备所执行的动作，这时，该装置可以称为第一终端设备，收发单元用于执行第一方面的任一可能的实现方式中第一终端设备侧的收发相关的操作，处理单元用于执行第一方面任一可能的实现方式中第一终端设备侧的处理相关的操作。
其中，所述收发单元用于接收第一指示信息，所述第一指示信息用于指示候选资源集合，所述候选资源集合包括的资源为第二终端设备发送PSCCH的候选资源；若接收所述第一指示信息对应的参考信号接收功率RSRP大于第一RSRP阈值，所述处理单元用于控制所述收发单元根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH。
在一些可能的实现方式中，所述第一RSRP阈值为预设的或者网络设备配置的。
在一些可能的实现方式中，所述第一指示信息还用于指示第一业务优先级；所述处理 单元用于：根据所述第一业务优先级和所述第一终端设备的第二业务优先级确定所述第一RSRP阈值，或者，根据所述第一业务优先级确定所述第一RSRP阈值。
在一些可能的实现方式中，所述第一指示信息还用于指示目标地址，所述第一指示信息指示的目标地址是与业务对应的地址，所述处理单元具体用于控制所述收发单元：若所述第一终端设备存在一个业务的目标地址与所述第一指示信息指示的目标地址相同，根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH；所述收发单元还用于：根据所述第一PSCCH接收与所述第一PSCCH关联的第一物理侧行链路共享信道PSSCH。
在一些可能的实现方式中，所述收发单元还用于：通过第二PSSCH接收无线资源控制RRC信令，所述RRC信令携带所述第一指示信息；或者，
通过所述第二PSSCH接收媒体接入控制层单元MAC CE，所述MAC CE携带所述第一指示信息；或者，
通过所述第二PSSCH接收第二阶段侧行链路控制信息SCI2，所述SCI2携带所述第一指示信息。
在一些可能的实现方式中，所述收发单元还用于：接收与所述第二PSSCH关联的侧行链路控制信息SCI，所述SCI包括第二指示信息，所述第二指示信息用于指示所述第二PSSCH承载有所述第一指示信息。
在一些可能的实现方式中，所述收发单元具体用于：接收物理侧行链路广播信道PSBCH，所述PSBCH包括所述第一指示信息。
在一些可能的实现方式中，所述收发单元具体用于，包括：在预配置的候选资源或者网络设备配置的候选资源上接收所述第一指示信息。
在一些可能的实现方式中，所述处理单元用于：
确定所述第一指示信息指示的所述候选资源集合中的资源与第一感知窗口中的资源存在交集的资源；
所述收发单元用于在所述存在交集的资源上检测所述第一PSCCH。
第四方面，提供一种用于检测PSCCH的装置，装置用于执行上述第二方面的任一可能的实现方式中的方法。具体地，装置可以包括处理单元和收发单元。收发单元可以与外部进行通信，处理单元用于进行数据处理。收发单元还可以称为通信接口或通信单元。
该装置可以用于执行第二方面的任一可能的实现方式中终端设备所执行的动作，这时，该装置可以称为终端设备，收发单元用于执行第二方面的任一可能的实现方式中终端设备侧的收发相关的操作，处理单元用于执行第二方面任一可能的实现方式中终端设备侧的处理相关的操作。
其中，所述收发单元用于发送第一指示信息，所述第一指示信息用于指示候选资源集合，所述候选资源集合包括的资源为所述第二终端设备发送PSCCH的候选资源；所述收发单元还用于根据所述第一指示信息指示的所述候选资源集合包括的资源发送至少一个第一PSCCH。
在一些可能的实现方式中，所述第一指示信息还用于指示第一业务优先级。
在一些可能的实现方式中，所述第一指示信息还用于指示目标地址，所述第一指示信息指示的目标地址是与业务对应的地址；所述收发单元还用于：
根据所述至少一个第一PSCCH发送所述至少一个第一PSCCH关联的至少一个物理侧行链路共享信道PSSCH。
在一些可能的实现方式中，所述收发单元还用于：
通过第二PSSCH发送无线资源控制RRC信令，所述RRC信令携带所述第一指示信息；或者，
通过第二PSSCH发送媒体接入控制层单元MAC CE，所述MAC CE携带所述第一指示信息；或者，
通过第二PSSCH发送第二阶段侧行链路控制信息SCI2，所述SCI2携带所述第一指示信息。
在一些可能的实现方式中，所述收发单元还用于：发送与所述第二PSSCH关联的侧行链路控制信息SCI，所述SCI包括第二指示信息，所述第二指示信息用于指示所述第二PSSCH承载有所述第一指示信息。
在一些可能的实现方式中，所述收发单元具体用于：发送物理侧行链路广播信道PSBCH，所述PSBCH包括所述第一指示信息。
在一些可能的实现方式中，所述收发单元具体用于：根据预配置的候选资源或者网络设备配置的候选资源发送所述第一指示信息。
在一些可能的实现方式中，所述收发单元用于：
在第二感知窗口中接收至少一个第二PSCCH；
所述处理单元用于根据所述至少一个第二PSCCH确定预留的第二选择窗口中的资源；
所述收发单元用于：
根据所述预留的所述第二选择窗口中的资源，以及，所述预配置的候选资源发送所述第一指示信息，或者；
根据所述预留的所述第二选择窗口中的资源，以及，所述网络设备配置的候选资源发送所述第一指示信息。
在一些可能的实现方式中，所述处理单元用于：确定所述第一指示信息指示的所述候选资源集合包括的资源与第一选择窗口中的资源存在交集的资源；
所述收发单元用于在所述存在交集的资源上发送所述至少一个第一PSCCH。
第五方面，提供一种通信装置，该通信装置包括处理器和存储器，处理器与存储器耦合，存储器用于存储计算机程序或指令，处理器用于执行存储器存储的计算机程序或指令，使得上述第一方面中或第一方面的任一可能的实现方式中的方法被执行。
例如，处理器用于执行存储器存储的计算机程序或指令，使得该通信装置执行上述第一方面或第一方面的任一可能的实现方式中的方法。
可选地，该装置包括的处理器为一个或多个。
可选地，该装置中还可以包括与处理器耦合的存储器。
可选地，该装置包括的存储器可以为一个或多个。
可选地，该存储器可以与该处理器集成在一起，或者分离设置。
可选地，该装置中还可以包括收发器。
第六方面，提供一种通信装置，该通信装置包括处理器和存储器，处理器与存储器耦合，存储器用于存储计算机程序或指令，处理器用于执行存储器存储的计算机程序或指令， 使得上述第二方面或第二方面的任一可能的实现方式中的方法被执行。
例如，处理器用于执行存储器存储的计算机程序或指令，使得该通信装置执行上述第二方面或第二方面的任一可能的实现方式中的方法。
可选地，该装置包括的处理器为一个或多个。
可选地，该装置中还可以包括与处理器耦合的存储器。
可选地，该装置包括的存储器可以为一个或多个。
可选地，该存储器可以与该处理器集成在一起，或者分离设置。
可选地，该装置中还可以包括收发器。
第七方面，提供了一种通信系统，该通信系统包括上述第三方面或第三方面的任一可能的实现方式中的通信装置，以及，第四方面或第四方面的任一可能的实现方式中的通信装置；或者，所述通信系统包括上述第五方面或第五方面的任一可能的实现方式中的通信装置，以及，第六方面或第六方面的任一可能的实现方式中的通信装置。
第八方面，提供一种计算机可读存储介质，其上存储有用于实现第一方面或第一方面的任一可能的实现方式中的方法的计算机程序(也可称为指令或代码)。
例如，该计算机程序被计算机执行时，使得该计算机可以执行第一方面或第一方面的任一可能的实现方式中的方法。该计算机可以为通信装置。
第九方面，提供一种计算机可读存储介质，其上存储有用于实现第二方面或第二方面的任一可能的实现方式中的方法的计算机程序(也可称为指令或代码)。
例如，该计算机程序被计算机执行时，使得该计算机可以执行第二方面或第二方面的任一可能的实现方式中的方法。该计算机可以为通信装置。
第十方面，本申请提供一种芯片，包括处理器。处理器用于读取并执行存储器中存储的计算机程序，以执行第一方面及其任意可能的实现方式中的方法。
可选地，所述芯片还包括存储器，存储器与处理器通过电路或电线与存储器连接。
进一步可选地，所述芯片还包括通信接口。
第十一方面，本申请提供一种芯片，包括处理器。处理器用于读取并执行存储器中存储的计算机程序，以执行第二方面及其任意可能的实现方式中的方法。
可选地，所述芯片还包括存储器，存储器与处理器通过电路或电线与存储器连接。
进一步可选地，所述芯片还包括通信接口。
第十二方面，本申请提供一种计算机程序产品，所述计算机程序产品包括计算机程序(也可称为指令或代码)，所述计算机程序被计算机执行时使得所述计算机实现第一方面或第一方面的任一可能的实现方式中的方法。
第十三方面，本申请提供一种计算机程序产品，所述计算机程序产品包括计算机程序(也可称为指令或代码)，所述计算机程序被计算机执行时使得所述计算机实现第二方面或第二方面的任一可能的实现方式中的方法。
第十四方面，本申请提供一种通信装置，包含用于实现本申请任一实施例所述方法的单元。
附图说明
图1是本申请实施例提供的通信系统的示意图。
图2是本申请实施例提供的用于检测PSCCH的方法的示意图。
图3是本申请实施例提供的第二感知窗口和第二选择窗口的示意图。
图4是本申请实施例提供的第二感知窗口和第二选择窗口中的预留资源的示意图。
图5是本申请实施例提供的S-SSB的示意图。
图6是本申请实施例提供的另一用于检测PSCCH的方法的示意图。
图7是本申请实施例提供的又一用于检测PSCCH的方法的示意图。
图8是本申请实施例提供的用于检测PSCCH的通信装置的示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
应理解，本申请实施例中的方式、情况、类别以及实施例的划分仅是为了描述的方便，不应构成特别的限定，各种方式、类别、情况以及实施例中的特征在不矛盾的情况下可以相结合。
还应理解，本申请实施例中的“第一”、“第二”以及“第三”仅为了区分，不应对本申请构成任何限定。还应理解，在本申请的各种实施例中，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。
图1是设备间通信系统100的示意图。该无线通信设备可以包括一个或多个网络设备，例如图1中的网络设备110。终端设备121和终端设备122都可以与网络设备110进行通信，例如图1中，网络设备110与终端设备121进行通信。终端设备121发送数据给网络设备110的链路称为上行链路(uplink)，而终端设备121接收网络设备110发送的数据的链路称为下行链路(downlink)。如图1所示，该无线通信系统100还可以包括多个终端设备，例如图1中的终端设备121和终端设备122。终端设备121和终端设备122之间可以直接进行通信。终端设备121和终端设备122之间传输数据的链路称为侧行链路(sidelink)。例如，终端设备121可以通过侧行链路发送数据给终端设备122，终端设备122可以通过侧行链路发送数据给终端设备121。侧行链路一般用于车辆对其他设备(vehicle to everything,V2X)，或者设备到设备(device to device，D2D)等可以在设备间进行直联通信的场景。V2X通信可以看成是D2D通信的一种特殊情形。
新无线(new radio，NR)接入技术是目前主流的无线通信技术，其针对V2X业务特性及新的业务需求，可以支持更低延迟、更高可靠性的V2X通信。V2X是实现智能汽车、自动驾驶、智能交通运输系统的基础和关键技术。V2X可以包括车到互联网(vehicle to network，V2N)、车到车(vehicle to-vehicle，V2V)、车到基础设施(vehicle to infrastructure，V2I)、车到行人(vehicle to pedestrian，V2P)等。V2N通信是目前应用最广泛的车联网形式，其主要功能是使车辆通过移动网络，连接到云服务器，使用云服务器提供的导航、娱乐、防盗等应用功能。V2V通信可以用于车辆间信息交互和提醒，最典型的应用是用于车辆间防碰撞安全系统。通过V2I通信，车辆可以与道路甚至其他基础设施，例如交通灯、路障等通信，获取交通灯信号时序等道路管理信息。V2P通信可以用于对道路上的行人或非机动车的安全警告。
终端设备121或终端设备122可以是固定位置的，也可以是可移动的。图1只是示意 图，该通信系统中还可以包括其它网络设备，如还可以包括无线中继设备和无线回传设备，在图1中未画出。本申请的实施例对该移动通信系统中包括的网络设备和终端设备的种类和数量不作限定。
在移动通信系统100中，终端设备121或终端设备122通过无线方式接入到该移动通信系统中的网络设备。该网络设备101可以是：基站、演进型基站(evolved node B，eNB)、家庭基站、无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为NR系统中的gNB，或者，还可以是构成基站的组件或一部分设备，如汇聚单元(central unit，CU)、分布式单元(distributed unit，DU)或基带单元(baseband unit，BBU)等。
该移动通信系统100中的终端设备121或终端设备122也可以称为终端、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。本申请实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑，还可以是应用于虚拟现实(virtual reality，VR)、增强现实(augmented reality，AR)、工业控制(industrial control)、无人驾驶(self driving)、远程医疗(remote medical)、智能电网(smart grid)、运输安全(transportation safety)、智慧城市(smart city)以及智慧家庭(smart home)等场景中的无线终端。本申请中将前述终端设备及可应用于前述终端设备的芯片统称为终端设备。应理解，本申请实施例对终端设备所采用的具体技术和具体设备形态不做限定。
应理解，图1中仅为便于理解，示意性地示出了终端设备121和终端设备122、网络设备110，但这不应对本申请构成任何限定，该无线通信系统中还可以更多数量的网络设备，也可以包括更多或更少数量的终端设备，本申请对此不做限定。
终端设备121与终端设备122通信的资源可以是网络设备110分配的资源，或者可以是在预设的资源池中自发选择的资源。如果终端设备121和终端设备122在网络设备110的覆盖范围之内，则终端设备121与终端设备122通信的资源可以是网络设备110分配的资源也可以是在预设的资源池中自发选择的资源。如果终端设备121或终端设备122不在网络设备110的覆盖范围之内，则终端设备121与终端设备122通信的资源是在预设的资源池中自发选择的资源。例如，终端设备121通过在预设的资源池中自发选择的资源向终端设备122发送PSCCH，终端设备122需要在预设的资源池中盲检测，才能接收到终端设备121发送的PSCCH。如果预设的资源池中的资源的带宽比较大或者对应的子信道比较多时，则会导致终端设备122盲检测的开销比较大，从而导致终端设备122的能耗比较高。
下面以第一终端设备为终端设备122，第二终端设备为终端设备121为例描述。
为了解决上述问题，本申请实施例中，第二终端设备可以发送第一指示信息，第一指示信息用于指示第二终端设备发送PSCCH的候选资源集合，第一终端设备接收到第一指示信息之后，可以根据第一指示信息指示的候选资源集合上接收第二终端设备发送的PSCCH，从而避免第一终端设备需要在预设的资源池中的所有资源上盲检测PSCCH所带来的开销。
下面结合附图描述本申请实施例提供的用于检测PSCCH的方法，如图2所示，方法200包括：
S201，第二终端设备发送第一指示信息，第一终端设备接收第一指示信息。
其中，第一指示信息用于指示候选资源集合、第一业务优先级、目标地址中的至少一项。其中，目的地址为第二终端设备的业务对应的地址。
可选地，候选资源集合包括的资源为第二终端设备发送PSCCH的候选资源。
可选地，候选资源集合包括一个或多个资源。
可选地，候选资源集合包括的一个或多个资源可以是一个或多个频域资源，或者可以是一个或多个时域资源，或者可以是一个或多个时频域资源。
可选地，S201中的候选资源集合可以是预配置的或者是网络设备配置的。
可选地，S201中的候选资源集合可以是第二终端设备确定的。可选地，第二终端设备可以选择信道条件比较好的一个或多个子信道作为候选资源集合包括的频域资源。可选地，第二终端设备可以根据第二终端设备的第一业务的周期选择一个或多个时隙作为候选资源集合包括的时域资源。
可选地，第二终端设备可以支持一个或多个业务。可选地，第一指示信息还可以指示第一业务优先级。可选地，如果第二终端设备只支持一个业务，则第一业务优先级为该业务的优先级。可选地，如果第二终端设备支持多个业务，第一业务优先级可以为多个业务中优先级最高的业务对应的优先级。可选地，如果第二终端设备支持多个业务，第一业务优先级可以为多个业务中任一业务对应的优先级。
可选地，第二终端设备支持的一个或多个业务中的任意一个业务可以为单播业务、广播业务或者组播业务。
可选地，第一业务的目标地址可以为第二终端设备有发送数据的需求，需要将第一业务的数据发送到目标地址。可选地，目标地址可以第一业务的目的地的层2的目标ID，其中，层2是指介质接入控制(medium access control，MAC)，可选地，第二终端设备可以根据应用层ID得到层2的目标ID，例如层2的ID可以为24比特。
可选地，第一指示信息还可以指示第二终端设备的标识。
其中，第二终端设备发送的第一指示信息，一个或多个终端设备都可以接收到第一指示信息，本申请实施例仅以第一终端设备接收到第一指示信息为例描述。
可选地，第一终端设备接收到第一指示信息之后，可以向第二终端设备发送第一响应消息，第一响应消息表示第一终端设备接收到第一指示信息。第二终端设备接收到第一响应消息之后，执行S202。
可选地，第二终端设备可以周期性发送第一指示信息，周期可以是预设的或者网络设备配置的。可选地，若第二终端设备有传输数据的需求可以发送第一指示信息。可选地，第二终端设备可以随机发送第一指示信息。本申请实施对第二终端设备发送第一指示信息的触发条件不作任何限制。
可选地，S201中描述的是第一指示信息用于指示第二终端设备发送PSCCH的候选资源集合、第一业务优先级、目标地址中的至少一项。可以理解的是，也可以通过不同的指示信息指示第二终端设备发送PSCCH的候选资源集合、第一业务优先级、目标地址中的至少一项。或者，可以通过不同的消息发送指示第二终端设备发送PSCCH的候选资源集合、第一业务优先级、目标地址中的至少一项的指示信息。例如，指示信息1用于指示第二终端设备发送PSCCH的候选资源集合，指示信息2用于指示第一业务优先级，指示信 息3用于指示目标地址。可以在一个消息中发送指示信息1、指示信息2和指示信息3，或者可以在不同的消息中发送指示信息1、指示信息2和指示信息3，例如在消息1发送指示信息1、在消息2中发送指示信息2，在消息3中发送指示信息3，或者在同一个消息中发送指示信息1、指示信息2和指示信息3中的两项或者三项。
可选地，第二终端设备可以根据以下任意一种方式选择发送第一指示信息的资源。
方式一，第二终端设备可以在预配置的候选资源或者网络设备配置的候选资源上发送第一指示信息，预配置的候选资源可以理解为协议规定的资源。
可选地，预配置的候选资源的带宽小于第一带宽预设值，或者预配置的候选资源的子信道数量小于第一信道预设值，这样，当第二终端设备在预配置的候选资源上发送第一指示信息时，第一终端设备在预配置的候选资源上检测第一指示信息的过程中，可以减小盲检测的开销；可选地，网络设备配置的候选资源的带宽小于第一带宽预设值，或者预配置的资源的子信道数量小于第一信道预设值，这样，当第二终端设备在网络设备配置的候选资源上发送第一指示信息时，第一终端设在网络设备配置的候选资源上检测第一指示信息过程中，可以减小盲检测的开销。
可选地，预配置的候选资源可以为窄带资源，或者网络设备配置的候选资源可以称为窄带资源。
可选地，第一终端设备和第二终端设备都可以获知预配置的候选资源，或者可以获知网络设备配置的候选资源。这样，第二终端设备可以在预配置的候选资源或者网络设备配置的候选资源上发送第一指示信息，第一终端设备可以在预配置的候选资源或者网络设备配置的候选资源上接收第一指示信息。
方式二，若第二终端设备有发送第一指示信息的需求，第二终端设备可以确定第二感知窗口(sensing window)和第二选择窗口(selection window)。第二终端设备可以在第二感知窗口中接收至少一个第二PSCCH，至少一个第二PSCCH携带的控制信息用于指示在第二选择窗口中预留的资源，第二终端设备可以在第二选择窗口中选择资源时，避开至少一个第二PSCCH携带的控制信息所指示的预留资源，有利于降低干扰，从而可以提高发送第一指示信息成功的可能性。
可选地，第二终端设备确定的第二感知窗口的带宽可以小于第二带宽预设值或者第二感知窗口的子信道的数量可以小于第二信道预设值，这样，可以节省第二终端设备接收至少一个第二PSCCH的开销。可选地，第二终端设备确定的第二选择窗口的带宽可以小于第三带宽预设值或者第二选择窗口的子信道的数量可以小于第三子信道预设值，这样，可以节省第一终端设备检测第一指示信息的开销。
具体地，如图3所示，在确定发送第一指示信息需求的时刻n，第二终端设备可以根据时刻n确定第二感知窗口和第二选择窗口。第二终端设备可以在第二感知窗口能够接收其他终端设备发送的PSCCH，其他终端设备发送的PSCCH携带的控制信息用于指示在第二选择窗口中预留的资源。第二终端设备可以确定其他终端设备发送的PSCCH携带的控制信息所指示的在第二选择窗口中预留的资源。第二终端设备可能在第二感知窗口中的某些资源能够接收到PSCCH，在一些资源上可能接收不到PSCCH，若第二终端设备在某些资源上检测到PSCCH，第二终端设备测量检测到的PSCCH的RSRP或者测量检测到的PSCCH关联的PSSCH的RSRP，第二终端设备可以根据测量的RSRP与RSRP阈值确定 第二选择窗口中该PSCCH携带的控制信息所指示的预留资源的干扰情况，如果测量的RSRP大于RSRP阈值，表示该PSCCH携带的控制信息所指示的第二选择窗口中的预留资源的干扰太大，则表示第二选择窗口中的该PSCCH携带的控制信息所指示的预留资源不可用，如果RSRP小于RSRP阈值，表示该PSCCH携带的控制信息所指示的第二选择窗口中的预留资源的干扰较小，则表示第二选择窗口中的该PSCCH携带的控制信息所指示的预留资源可用。第二终端设备可以根据资源的干扰情况确定发送第一指示信息的资源。例如，如图4所示，第二终端设备在第二感知窗口的三个资源上接收UE1、UE2和UE3发送的PSCCH，UE1、UE2和UE3发送的PSCCH携带的控制信息分别预留了第二选择窗口中的三个资源，且第二终端设备测量在第二感知窗口检测到的三个UE发送的PSCCH的RSRP大于RSRP阈值，第二终端设备在确定发送第一指示信息的资源时，可以避开UE1、UE2和UE3预留的第二选择窗口中的三个资源。
可以理解的是，PSCCH携带的控制信息可以是SCI或者SCI1。
方式三，若第二终端设备有发送第一指示信息的需求，第二终端设备可以确定第二感知窗口和第二选择窗口。第二终端设备可以在第二感知窗口中接收至少一个第二PSCCH，至少一个第二PSCCH携带的控制信息用于指示在第二选择窗口中预留的资源。第二终端设备根据所预留的第二选择窗口中的资源，以及，预配置的候选资源或者网络设备配置的候选资源发送第一指示信息。可选地，第二终端设备可以在预配置的候选资源或者网络设备配置的候选资源中选择资源时，避开至少一个第二PSCCH预留的第二选择窗口中的资源，换句话说，如果第二选择窗口中至少一个第二PSCCH预留的资源刚好与预配置的候选资源或者网络设备配置的候选资源存在交集，则第二终端设备在预配置的候选资源或者网络设备配置的候选资源选择发送第一指示信息的资源时，需要避开存在交集的资源。有利于降低干扰，提高发送第一指示信息成功的可能性。
可选地，第一终端设备和第二终端设备都可以获知预配置的候选资源，或者可以获知网络设备配置的候选资源。这样，第二终端设备可以在存在交集的候选资源上发送第一指示信息，第一终端设备可以在预配置的候选资源或者网络设备配置的候选资源上接收第一指示信息。
可选地，第二终端设备确定的第二感知窗口的带宽可以小于第二带宽预设值或者第二感知窗口的子信道的数量可以小于第二信道预设值，这样，可以节省第二终端设备检测至少一个第二PSCCH的开销。可选地，第二终端设备确定的第二选择窗口的带宽可以小于第三带宽预设值或者第二选择窗口的子信道的数量可以小于第三子信道预设值，预配置的候选资源或者网络设备配置的候选资源的带宽小于第一带宽预设值，或者预配置的候选资源或者网络设备配置的候选资源的子信道数量小于第一信道预设值，这样，可以节省第一终端设备检测第一指示信息的开销。
其中，第二选择窗口和第二感知窗口参见图3。
可选地，S201，第二终端设备可以通过以下任意一种方式发送第一指示信息。
方式一，第二终端设备发送物理侧行链路广播信道(physical sidelink broadcast channel，PSBCH)，PSBCH中包括第一指示信息。
可选地，第二终端设备可以发送侧行链路同步信号/物理广播信道块(sidelink synchronization system/physical broadcast channel block，S-SS/PBCH block)。其中， S-SS/PBCH block可以简称为同步信号块(sidelink synchronization signal block，S-SSB)，S-SSB中的PSBCH包括第一指示信息。S-SSB的示意图如图5所示，包括侧行链路主同步信号(sidelink primary synchronization signal，S-PSS)，侧行链路辅同步信号(sidelink secondary synchronization signal，S-SSS)、PSBCH以及GAP。
可选的，方式一可以适用于广播业务。
方式二，第二终端设备可以通过第二物理侧行链路共享信道(physical sidelink shared channel，PSSCH)发送第一指示信息。
可选地，第一指示信息可以承载在无线资源控制(radio resource control，RRC)信令，第二终端设备可以通过第二PSSCH发送承载第一指示信息的RRC信令。
可选地，第一指示信息可以承载在MAC控制单元(control element，CE)，第二终端设备可以通过第二PSSCH发送承载第一指示信息的MAC CE。
可选地，第一指示信息可以承载在第二阶段侧行链路控制信息(sidelink control information，SCI2)。第二终端设备可以通过第二PSSCH发送承载第一指示信息的SCI2。
可选地，若第一终端设备通过第二PSSCH接收到第一指示信息，第一终端设备可以向第二终端设备发送第一混合自动重传请求(hybrid automatic repeat request，HARQ)消息，此时，前述的第一响应消息可以是第一HARQ消息，第二终端设备接收到第一HARQ消息之后，可以确定第一终端设备接收到了第一指示信息，从而可以执行S202。
可选地，第二终端设备还可以发送第二指示信息，第二指示信息用于指示第二PSSCH中承载有第一指示信息。第二PSSCH中可以携带单播标识或者组播标识，第一终端设备根据第二PSSCH中的单播标识或者组播标识确定第二PSSCH是发送给第一终端设备的，因此第一终端设备可以解析第二PSSCH中的第一指示信息。对于接收到第二指示信息的其他终端设备，例如第四终端设备，第四终端设备接收到第二PSSCH之后，第四终端设备根据第二PSSCH中的单播标识或者组播标识确定第二PSSCH不是发送给第四终端设备的。但是如果第四终端设备有感知资源的需求，第四终端设备可以根据第二指示信息确定第二PSSCH中携带有第一指示信息，因此第四终端设备可以根据第二PSSCH中的第一指示信息，确定第二终端设备发送PSCCH的候选资源集合，第四终端设备可以根据候选资源集合包括的资源检测第一PSCCH(该第一PSCCH可以与第一终端设备检测到的第一PSCCH相同或者不同)，这样，第四终端设备可以根据接收的第一PSCCH确定第一PSCCH携带的控制信息指示的在第四选择窗口中预留的资源，从而第四终端设备在选择资源时，避免第一PSCCH携带的控制信息所指示的预留资源。也就是说，第二终端设备发送第二指示信息的目的是为了让不管是否是第二PSSCH的接收方，都能够解析第二PSSCH中的第一指示信息。
可选地，第二终端设备可以发送与第二PSSCH关联的SCI，与第二PSSCH关联的SCI包括第二指示信息，第二PSSCH关联的SCI可以为第一阶段侧行链路控制信息SCI1或者是侧行链路控制信息SCI。可选地，不同的通信系统中SCI的设计不同，在一些通信系统中SCI通过PSCCH发送，在一些通信系统中部分SCI通过PSCCH发送，剩余部分SCI通过PSSCH发送，例如，SCI1通过PSCCH发送，SCI2通过PSSCH发送。
可选地，在方式二中，第二终端设备可以通过组播或者单播的方式通过第二PSSCH发送第一指示信息。可选的，方式二可以适用于组播或者单播业务。
可选地，若第一指示信息指示了第一业务优先级，则执行S202。否则执行S203或者执行S204。
S202，第一终端设备根据第一业务优先级确定第一参考信号接收功率(reference signal receiving power，RSRP)阈值。
可以理解的是，不同业务优先级的业务对应的RSRP阈值不同，如果某个业务的业务优先级越高，则对应的RSRP阈值越高，则选择窗口中有比较多的资源容易满足要求，如果某个业务的业务优先级越低，则对应的RSRP阈值越低，则选择窗口中有比较少的资源容易满足要求。因此，协议可以规定业务优先级与RSRP阈值之间的关系。
当第一终端设备根据第一指示信息确定第一业务优先级时，可以根据业务优先级与RSRP阈值之间的关系确定与第一业务优先级对应的第一RSRP阈值。可选地，第一终端设备也可以根据业务优先级与RSRP阈值之间的关系确定与第一业务优先级和第二业务优先级对应的第一RSRP阈值。
其中，第二业务优先级为第一终端设备的一个业务对应的优先级。第一终端设备可以支持一个或多个业务。可选地，如果第一终端设备只支持一个业务，则第二业务优先级为该业务的优先级。可选地，如果第一终端设备支持多个业务，第二业务优先级可以为多个业务中优先级最高的业务对应的优先级。可选地，如果第一终端设备支持多个业务，第二业务优先级可以多个业务中任一业务对应的优先级。可选地，第二业务优先级为第一终端设备即将传输的业务对应的优先级。
可选地，也可以不存在S202步骤，即第一RSRP阈值可以是预设的。换句话说，第一指示信息可以指示第一业务优先级，但是第一终端设备不执行S202，或者第一指示信息指示了第一业务优先级，但是第一终端设备不执行S202。
S203，第一终端设备确定接收第一指示信息的RSRP是否大于第一RSRP阈值，若大于第一RSRP阈值，则执行S204。否则方法200结束。
可选地，若第一终端设备通过PSBCH接收的第一指示信息，则S203中接收第一指示信息的RSRP可以是接收PSBCH的RSRP。
可选地，若第一终端设备通过S-SSB接收的第一指示信息，则S203中接收第一指示信息的RSRP可以是接收S-SSB中的PSBCH的RSRP。
可选地，若第一终端设备通过第二PSSCH接收的第一指示信息，则S203中接收第一指示信息的RSRP可以是接收第二PSSCH的RSRP，或者是接收与第二PSSCH关联的PSCCH的RSRP。
S204，第二终端设备根据候选资源集合中包括的资源发送至少一个第一PSCCH，第一终端设备根据候选资源集合包括的资源检测第一PSCCH。
其中，第一终端设备根据候选资源集合包括的资源检测到的第一PSCCH可以是至少一个第一PSCCH中的一个，或者也可以是至少一个第一PSCCH中的多个，本申请实施例仅以检测到一个PSCCH为例描述。
可选地，第二终端设备可以在候选资源集合包括的部分资源上发送至少一个第一PSCCH，或者可以在候选资源集合包括的全部资源上发送至少一个第一PSCCH。可选地，第一终端设备可以在候选资源集合包括的部分资源上检测至少一个第一PSCCH中的至少部分第一PSCCH。可选地，第一终端设备可以在候选资源集合包括的全部资源上检测至少 一个第一PSCCH中的至少部分第一PSCCH。
可选地，若第一终端设备有传输数据的需求，则第一终端设备可以确定第一感知窗口。其中，第一感知窗口与图3中的第二感知窗口类似，为了避免赘述，不再详细说明第一感知窗口。第一终端设备可以确定第一感知窗口与第一指示信息指示的候选资源集合包括的资源的交集，在存在交集的资源上检测第一PSCCH。举例来说，第一指示信息指示的候选资源集合包括资源1、资源2和资源3。第一感知窗口包括资源3和资源4，则第一终端设备在资源3上检测第一PSCCH。
S205，第一终端设备根据第一PSCCH携带的控制信息指示的在第三选择窗口中预留的资源，向第三终端设备发送第三PSCCH，第三终端设备接收第三PSCCH。
其中，第三选择窗口是第一终端设备确定的第一感知窗口对应的选择窗口。即第一终端设备可以通过在第一感知窗口检测到的第一PSCCH，确定第一PSCCH携带的控制信息指示的在第三选择窗口中预留的资源。
可选地，第一终端设备在向第三终端设备发送第三PSCCH时，可以避开第一PSCCH携带的控制信息指示的在第三选择窗口中预留的资源。举例来说，第三选择窗口包括资源5和资源6，第一PSCCH携带的控制信息指示预留了第三选择窗口中的资源5，则第一终端设备不在资源5上发送第三PSCCH，而是在资源6上发送第三PSCCH，这样，可以避免第一终端设备在资源5上发送第三PSCCH时，对第二终端设备造成的干扰，有利于提高成功传输第三PSCCH的可能性。又或者，第一终端设备测量检测到的第一PSCCH的RSRP或者测量检测到的第一PSCCH关联的PSSCH的RSRP，如果测量的RSRP大于RSRP阈值，表示该第一PSCCH携带的控制信息所指示的资源5上的干扰太大，则第一终端设备不在资源5上发送第三PSCCH，而是在资源6上发送第三PSCCH。
可以理解的是，方法200中第一指示信息可以指示目标地址也可以不指示目标地址，若第一指示信息指示了目标地址，第一终端设备可以不作任何处理。
可以理解的是，方法200中的第二终端设备可以与第三终端设备不同或者相同，本申请实施例不予限制。
可选地，方法200可以包括S201，S204和S205这三个步骤，不包括S202和S203步骤，也就是说，不管第一指示信息是否指示了目标地址或第一业务优先级，第一终端设备都可以根据检测的第一PSCCH携带的控制信息所指示的预留资源向第三终端设备发送第三PSCCH。
可选地，若第二终端设备确定更新发送PSCCH的候选资源集合，第二终端设备可以发送第三指示信息，第三指示信息指示发送PSCCH的更新的候选资源集合。可选地，S204中的至少一个第一PSCCH中的至少部分第一PSCCH关联的PSSCH可以携带第三指示信息，例如：至少一个第一PSCCH中的每个第一PSCCH关联的PSSCH可以携带第三指示信息，第二终端设备发送了至少一个第一PSCCH之后，再在更新后的候选资源集合上发送后续的PSCCH，这样，接收到第一PSCCH的第一终端设备可以在更新后的候选资源集合上接收后续的PSCCH。可选地，第一终端设备接收到第一PSCCH关联的一个PSSCH之后，可以向第二终端设备发送该接收到的PSSCH的HARQ，第二终端设备根据HARQ确定第一终端设备接收到了第三指示信息，因此第二终端设备可以根据更新后的候选资源集合包括的资源发送后续的PSCCH，也就是说，第二终端设备需要保证第一终端设备正确 接收第三指示信息之后，才根据更新后的候选资源集合包括的资源发送后续的PSCCH，避免第二终端设备直接根据更新后的候选资源集合发送后续的PSCCH，第一终端设备如果没有正确接收第三指示信息，第一终端设备会继续根据更新前的候选资源集合包括的资源接收PSCCH，导致接收PSCCH错误。
可选地，第三指示信息与第一指示信息类似，也可以指示第三业务优先级或者另一个目标地址，为了避免赘述，本申请实施例不详细描述。可选地，第三指示信息指示的第三业务优先级可以与第一指示信息指示的第一业务优先级可以相同或者不同。可选地，第三指示信息指示的另一个目标地址可以与第一指示信息指示的目标地址可以相同或者不同。
在上述方法200中，第二终端设备发送第一指示信息，第一指示信息可以指示候选资源集合和第一业务优先级，第一终端设备根据第一业务优先级确定第一RSRP阈值，当第一终端设备接收第一指示信息的RSRP大于第一RSRP阈值时，第一终端设备根据候选资源集合检测第一PSCCH，根据第一PSCCH预留的第三选择窗口中的资源，向第三终端设备发送第三PSCCH，也就是说，第一终端设备在向第三终端设备发送第三PSCCH的过程中可以避开第一PSCCH预留的第三选择窗口中的资源，从而可以提高传输第三PSSCH的成功率。
方法200中，第一终端设备需要向第三终端设备发送第三PSSCH，即第一终端设备发送的第三PSSCH的行为，下面方法结合方法600描述，第一终端设备接收第一PSSCH的行为。如图6所示方法600包括：
S601，同S201。
若第一指示信息指示了目标地址，则执行S602。
S602，第一终端设备确定是否存在一个业务的目标地址与第一指示信息指示的目标地址相同，若相同，则执行S603。否则方法200结束。
可选地，若网络设备配置了或者协议规定第一RSRP阈值，则第一终端设备可以确定接收第一指示信息的RSRP是否大于第一RSRP阈值，若第一终端设备确定接收第一指示信息的RSRP大于第一RSRP阈值，则执行S602。或者在S602之后，则第一终端设备可以确定接收第一指示信息的RSRP是否大于第一RSRP阈值，若第一终端设备确定接收第一指示信息的RSRP大于第一RSRP阈值，则执行S603。
可选地，若第一指示信息指示了第一业务优先级，与方法200类似，第一终端设备可以根据第一业务优先级确定第一RSRP阈值，第一终端设备可以确定接收第一指示信息的RSRP是否大于第一RSRP阈值，若第一终端设备确定接收第一指示信息的RSRP大于第一RSRP阈值，则执行S602。或者在S602之后，则第一终端设备可以确定接收第一指示信息的RSRP是否大于第一RSRP阈值，若第一终端设备确定接收第一指示信息的RSRP大于第一RSRP阈值，则执行S603。
也就是说，方法600在可以考虑接收第一指示信息的RSRP是否大于第一RSRP阈值，第一RSRP阈值可以是预设的或者网络设备配置的或者第一终端设备根据第一业务优先级确定的。当然，方法600也可以不考虑第一RSRP阈值，本申请实施例不予限制。
可选地，方法600中第一指示信息可以指示第一业务优先级也可以不指示第一业务优先级，若第一指示信息指示了第一业务优先级，第一终端设备可以不作任何处理，也可以根据第一业务优先级确定第一RSRP阈值。
S603，同S204。
S604，第二终端设备发送至少一个第一PSCCH关联的至少一个PSSCH，第一终端设备根据S603检测到的第一PSCCH接收第一PSSCH。
其中，一个PSCCH可以关联一个PSSCH。第一PSSCH为至少一个PSSCH中与第一PSCCH关联的PSSCH。
具体地，第一PSCCH可以指示接收第一PSSCH的资源或者解码第一PSSCH的方式等，第一终端设备可以根据第一PSCCH接收到第一PSSCH。
因此方法600中，第一指示信息可以指示候选资源集合和目标地址，第一RSRP阈值可以是网络设备配置的或者预配置的。若第一终端设备确定第一指示信息指示的目标地址与第一终端设备的一个目标地址相同，则第一终端设备确定第二终端设备有向第一终端设备发送PSSCH的需求，因此，第一终端设备可以根据第一PSCCH接收与第一PSCCH关联的第一PSSCH。
方法200中，第一终端设备需要向第三终端设备发送第三PSSCH，即第一终端设备发送的第三PSSCH的行为。方法600中描述的是，第一终端设备接收第一PSSCH的行为，下面方法结合方法700描述，第一终端设备需要向第三终端设备发送第三PSSCH，第一终端设备接收第一PSSCH的行为。如图7所示方法700包括：
S701，同S201。
若第一指示信息指示了第一业务优先级，则执行S602。
S702，同S202。
S703，第一终端设备确定接收第一指示信息的RSRP是否大于第一RSRP阈值，若大于第一RSRP阈值，则执行S704。否则方法700结束。
可选地，第一RSRP阈值可以是S702确定的或者是网络设备配置的或者是预配置的，本申请实施例不予限制。如果第一RSRP阈值是网络设备配置的或者是预配置的则可以不存在S702步骤。即不管第一指示信息是否指示了第一业务优先级，在S703中的第一RSRP阈值可以是网络设备配置的或者预设的。
S704，同S204。
S705，第一终端设备根据第一PSCCH携带的控制信息指示的在第三选择窗口中预留的资源，向第三终端设备发送第三PSCCH，第三终端设备接收第三PSCCH。
其中，S705参见S205的描述。
可选地，若第一指示信息指示了目标地址。执行S706。
S706，第一终端设备确定是否存在一个业务的目标地址与第一指示信息指示的目标地址相同，若相同，则执行S707。否则方法700结束。
其中，S706参见S602的描述。
S707，第二终端设备发送至少一个第一PSCCH关联的至少一个PSSCH，第一终端设备根据S704检测到的第一PSCCH接收第一PSSCH。
其中，一个PSCCH可以关联一个PSSCH。第一PSSCH为至少一个PSSCH中与第一PSCCH关联的PSSCH。
可选地，在方法700中，各个步骤的顺序不限制。如果S702，S703，S704和S705在S706和S707之前，表示第一终端设备确定接收第一指示信息的RSRP大于第一RSRP阈 值时，第一终端设备可以根据候选资源集合包括的资源检测第一PSCCH。在检测到第一PSCCH之后，再根据第一指示信息指示的目标地址确定第二终端设备是否有向第一终端设备传输PSSCH的需求，若有传输PSSCH的需求，则根据第一PSCCH接收第一PSSCH。如果S706在S703之前，执行顺序可以是：S701，S706，S704，S707，S702，S703，S705(其中，S707与S702或者S703的顺序没有限制，S707可以在S702或者S703的之前之后或者同时进行)则第一终端设备根据第一指示信息指示的目标地址确定第二终端设备是否有向第一终端设备传输PSSCH的需求，若有传输PSSCH的需求，则第一终端设备可以根据候选资源集合包括的资源检测第一PSCCH，检测到之后，根据第一PSCCH接收第一PSSCH。然后，若第一终端设备确定接收第一指示信息的RSRP大于第一RSRP阈值，则第一终端设备可以根据第一PSCCH预留的第三选择窗口中的资源向第三终端设备发送第三PSSCH。可选地，方法700的执行顺序也可以是：S701，S702，S703，S706，S704，S707，S705。可选地，方法700的执行顺序也可以是：S701，S706，S702，S703，S704，S707，S705，也就是说，同时满足S703和S706，第一终端设备才检测第一PSCCH。也就是说，同时满足S703和S706，第一终端设备才检测第一PSCCH。也就是说，方法700中，第一终端设备检测第一PSCCH的触发条件可以是S703或者S706，且检测到第一PSCCH既能接收第一PSSCH，也能发送第三PSSCH。
可选地，上述方法实施例中描述的是第二终端设备通过PSBCH发送第一指示信息或者通过第二PSSCH发送第一指示信息，第二终端设备还可以通过其他的消息发送第一指示信息。本申请实施例不予限制。
在一种可能的实现方式中，第二终端设备发送第一指示信息。第二终端设备在候选资源集合所包括的资源上发送PSCCH，第一终端设备在第一指示信息指示的候选资源集合所包括的资源上检测PSCCH。也就是说，第二终端设备在第一指示信息指示的候选资源集合包括的资源上发送PSCCH，第一终端设备在第一指示信息指示的候选资源集合包括的资源上接收PSCCH，从而可以降低盲检测的开销。
在一种可能的实现方式，第二终端设备发送第一指示信息。第二终端设备在候选资源集合所包括的资源上发送PSCCH，第一终端设备在第一指示信息指示的候选资源集合所包括的资源与第一感知窗口的资源存在交集的资源上检测PSCCH。也就是说，第二终端设备在第一指示信息指示的候选资源集合包括的资源上发送PSCCH，第一终端设备结合第一感知窗口和候选资源接收PSCCH。
在一种可能的实现方式中，第二终端设备发送第一指示信息。第二终端设备在候选资源集合所包括的资源与第二终端设备确定的第一选择窗口的资源存在交集的资源上发送PSCCH，第一终端设备在第一指示信息指示的候选资源集合所包括的资源上检测PSCCH。也就是说，第二终端设备发送PSCCH时可以参考候选资源集合中的资源以及第一选择窗口中的资源，第一终端设备在第一指示信息指示的候选资源集合包括的资源上接收PSCCH，从而可以降低盲检测的开销。
在一种可能的实现方式中，第二终端设备发送第一指示信息。第二终端设备在候选资源集合所包括的资源与第二终端设备确定的第一选择窗口的资源存在交集的资源上发送PSCCH，第一终端设备在第一指示信息指示的候选资源集合所包括的资源与第一感知窗口的资源存在交集的资源上检测PSCCH。也就是说，第二终端设备发送PSCCH时可以参考 候选资源集合中的资源以及第一选择窗口中的资源，第一终端设备结合第一感知窗口和候选资源接收PSCCH，从而可以降低盲检测的开销。
需要说明的是，本申请实施例中，第一感知窗口是第一终端设备确定的。第一选择窗口是第二终端设备确定的。第一感知窗口与第一选择窗口没有关系。也就是说，第一终端设备有传输数据的需求时，可以确定第一感知窗口，并确定与第一感知窗口对应的选择窗口，如第三选择窗口与第一感知窗口对应。第二终端设备有传输数据的需求时，可以确定第三感知窗口，并确定与第三感知窗口对应的第一选择窗口。
可以理解的是，通过第二PSSCH发送第一指示信息可以理解为，第二终端设备可以借助第二PSSCH发送第一指示信息，第一指示信息可以承载在通过第二PSSCH发送的MAC CE或者RRC信令或者SCI2，或者第一指示信息可以承载在除了MAC CE或者RRC信令或者SCI2之外的其他的信息中，本申请实施例对此不作限制。
可以理解的是，上述方法实施例的执行顺序并不受编号的限制，可以根据内在逻辑确定执行顺序，只要在不矛盾的前提下，方法的执行顺序都可以调换。
可以理解的是，上述方法实施例可以是独立的实施例或者是可以互相结合的实施例。不同方法实施例中的步骤可以互相结合称为另外的实施例，同一方法实施例中步骤也可以互相组合成为另外的实施例。
可以理解的是，上述各个方法实施例中由终端设备实现的方法和操作，也可以由可用于终端设备的部件(例如芯片或者电路)实现，上述各个方法实施例中由网络设备实现的方法和操作，也可以由可用于网络设备的部件(例如芯片或者电路)实现。
上文描述了本申请提供的方法实施例，下文将描述本申请提供的装置实施例。应理解，装置实施例的描述与方法实施例的描述相互对应，因此，未详细描述的内容可以参见上文方法实施例，为了简洁，这里不再赘述。
图8示出了本申请实施例提供的通信装置800。该通信装置800包括处理器810和收发器820。其中，处理器810和收发器820通过内部连接通路互相通信，该处理器810用于执行指令，以控制该收发器820发送信号和/或接收信号。
可选地，该通信装置800还可以包括存储器830，该存储器830与处理器810、收发器820通过内部连接通路互相通信。该存储器830用于存储指令，该处理器810可以执行该存储器830中存储的指令。在一种可能的实现方式中，通信装置800用于实现上述方法实施例中的第一终端设备对应的各个流程和步骤。在另一种可能的实现方式中，通信装置800用于实现上述方法实施例中的第二终端设备对应的各个流程和步骤。
应理解，通信装置800可以具体为上述实施例中的第一终端设备或第二终端设备，也可以是芯片或者芯片系统。对应的，该收发器820可以是该芯片的收发电路，在此不做限定。具体地，该通信装置800可以用于执行上述方法实施例中与第一终端设备或第二终端设备对应的各个步骤和/或流程。可选地，该存储器830可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器810可以用于执行存储器中存储的指令，并且当该处理器810执行存储器中存储的指令时，该处理器810用于执行上述与第一终端设备或第二终端设备对应的方法实施例的各个步骤和/或流程。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件 形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应注意，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
根据本申请实施例提供的方法，本申请还提供一种计算机程序产品，该计算机程序产品包括：计算机程序代码，当该计算机程序代码在计算机上运行时，使得该计算机执行上述方法实施例中第一终端设备或第二终端设备所执行的各个步骤或流程。
根据本申请实施例提供的方法，本申请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程序代码，当该程序代码在计算机上运行时，使得该计算机执行上述方法实施例中第一终端设备或第二终端设备所执行的各个步骤或流程。
根据本申请实施例提供的方法，本申请还提供一种通信系统，其包括前述的一个或多个第一终端设备以及一个或多个第二终端设备。
上述各个装置实施例中和方法实施例中的完全对应，由相应的模块或单元执行相应的步骤，例如通信单元(收发器)执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由处理单元(处理器)执行。具体单元的功能可以基于相应的方法实施例。其中，处理器可以为一个或多个。
在本申请中，“指示”可以包括直接指示和间接指示，也可以包括显式指示和隐式指示。将某一信息所指示的信息称为待指示信息，则具体实现过程中，对待指示信息进行指示的方式可以有很多种，例如但不限于，可以直接指示待指示信息，如指示待指示信息本身或者该待指示信息的索引等。也可以通过指示其他信息来间接指示待指示信息，其中该其他信息与待指示信息之间存在关联关系。还可以仅仅指示待指示信息的一部分，而待指示信息的其他部分则是已知的或者提前约定的。例如，还可以借助预先约定(例如协议规定)的各个信息的排列顺序来实现对特定信息的指示，从而在一定程度上降低指示开销。
在本申请的实施例中，各术语及英文缩略语均为方便描述而给出的示例性举例，不应对本申请构成任何限定。本申请并不排除在已有或未来的协议中定义其它能够实现相同或相似功能的术语的可能。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各种说明性逻辑块(illustrative logical block)和步骤(step)，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以基于前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，各功能单元的功能可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令(程序)。在计算机上加载和执行所述计算机程序指令(程序)时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、 磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (21)

  1. 一种用于检测物理侧行链路控制信道PSCCH的方法，其特征在于，所述方法适用于第一终端设备，所述方法包括：
    接收第一指示信息，所述第一指示信息用于指示候选资源集合，所述候选资源集合包括的资源为第二终端设备发送PSCCH的候选资源；
    若接收所述第一指示信息对应的参考信号接收功率RSRP大于第一RSRP阈值，根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH。
  2. 根据权利要求1所述的方法，其特征在于，所述第一RSRP阈值为预设的或者网络设备配置的。
  3. 根据权利要求1所述的方法，其特征在于，所述第一指示信息还用于指示第一业务优先级；所述方法还包括：
    根据所述第一业务优先级和所述第一终端设备的第二业务优先级确定所述第一RSRP阈值，或者，根据所述第一业务优先级确定所述第一RSRP阈值。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述第一指示信息还用于指示目标地址，所述第一指示信息指示的目标地址是与业务对应的地址，所述根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH，包括：
    若所述第一终端设备存在一个业务的目标地址与所述第一指示信息指示的目标地址相同，根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH；
    所述方法还包括：
    根据所述第一PSCCH接收与所述第一PSCCH关联的第一物理侧行链路共享信道PSSCH。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，包括：
    通过第二PSSCH接收无线资源控制RRC信令，所述RRC信令携带所述第一指示信息；或者，
    通过所述第二PSSCH接收媒体接入控制层单元MAC CE，所述MAC CE携带所述第一指示信息；或者，
    通过所述第二PSSCH接收第二阶段侧行链路控制信息SCI2，所述SCI2携带所述第一指示信息。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    接收与所述第二PSSCH关联的侧行链路控制信息SCI，所述SCI包括第二指示信息，所述第二指示信息用于指示所述第二PSSCH承载有所述第一指示信息。
  7. 根据权利要求1至4中任一项所述的方法，其特征在于，所述接收第一指示信息，包括：
    接收物理侧行链路广播信道PSBCH，所述PSBCH包括所述第一指示信息。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，所述接收第一指示信息，包括：
    在预配置的候选资源或者网络设备配置的候选资源上接收所述第一指示信息。
  9. 根据权利要求1至8中任一项所述的方法，其特征在于，所述根据所述第一指示信息指示的所述候选资源集合包括的资源检测第一PSCCH，包括：
    确定所述第一指示信息指示的所述候选资源集合中的资源与第一感知窗口中的资源存在交集的资源；
    在所述存在交集的资源上检测所述第一PSCCH。
  10. 一种用于检测物理侧行链路控制信道PSCCH的方法，其特征在于，所述方法适用于第二终端设备，所述方法包括：
    发送第一指示信息，所述第一指示信息用于指示候选资源集合，所述候选资源集合包括的资源为所述第二终端设备发送PSCCH的候选资源；
    根据所述第一指示信息指示的所述候选资源集合包括的资源发送至少一个第一PSCCH。
  11. 根据权利要求10所述的方法，其特征在于，所述第一指示信息还用于指示第一业务优先级。
  12. 根据权利要求10或11所述的方法，其特征在于，所述第一指示信息还用于指示目标地址，所述第一指示信息指示的目标地址是与业务对应的地址；所述方法还包括：
    根据所述至少一个第一PSCCH发送所述至少一个第一PSCCH关联的至少一个物理侧行链路共享信道PSSCH。
  13. 根据权利要求10至12中任一项所述的方法，其特征在于，所述方法还包括：
    通过第二PSSCH发送无线资源控制RRC信令，所述RRC信令携带所述第一指示信息；或者，
    通过第二PSSCH发送媒体接入控制层单元MAC CE，所述MAC CE携带所述第一指示信息；或者，
    通过第二PSSCH发送第二阶段侧行链路控制信息SCI2，所述SCI2携带所述第一指示信息。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    发送与所述第二PSSCH关联的侧行链路控制信息SCI，所述SCI包括第二指示信息，所述第二指示信息用于指示所述第二PSSCH承载有所述第一指示信息。
  15. 根据权利要求10至12中任一项所述的方法，其特征在于，所述发送第一指示信息，包括：
    发送物理侧行链路广播信道PSBCH，所述PSBCH包括所述第一指示信息。
  16. 根据权利要求10至15中任一项所述的方法，其特征在于，所述发送第一指示信息，包括：
    根据预配置的候选资源或者网络设备配置的候选资源发送所述第一指示信息。
  17. 根据权利要求16所述的方法，其特征在于，所述根据预配置的候选资源或者网络设备配置的候选资源发送第一指示信息，包括：
    在第二感知窗口中接收至少一个第二PSCCH；
    根据所述至少一个第二PSCCH确定预留的第二选择窗口中的资源；
    根据所述预留的所述第二选择窗口中的资源，以及，所述预配置的候选资源发送所述第一指示信息，或者；
    根据所述预留的所述第二选择窗口中的资源，以及，所述网络设备配置的候选资 源发送所述第一指示信息。
  18. 根据权利要求10至17中任一项所述的方法，其特征在于，所述根据所述第一指示信息指示的所述候选资源集合包括的资源发送至少一个第一PSCCH，包括：
    确定所述第一指示信息指示的所述候选资源集合包括的资源与第一选择窗口中的资源存在交集的资源；
    在所述存在交集的资源上发送所述至少一个第一PSCCH。
  19. 一种通信装置，其特征在于，包括处理器，所述处理器用于执行如权利要求1至18中任一项所述的方法。
  20. 一种通信装置，其特征在于，包括处理器和存储器，所述处理器与存储器耦合，所述存储器用于存储计算机程序或指令，所述处理器用于执行存储器中的所述计算机程序或指令，使得权利要求1至18中任一项所述的方法被执行。
  21. 一种计算机可读存储介质，其特征在于，存储有用于实现权利要求1至18中任一项所述的方法的程序或者指令。
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