WO2022077506A1 - 资源重选辅助的方法与装置和资源重选的方法与装置 - Google Patents

资源重选辅助的方法与装置和资源重选的方法与装置 Download PDF

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Publication number
WO2022077506A1
WO2022077506A1 PCT/CN2020/121690 CN2020121690W WO2022077506A1 WO 2022077506 A1 WO2022077506 A1 WO 2022077506A1 CN 2020121690 W CN2020121690 W CN 2020121690W WO 2022077506 A1 WO2022077506 A1 WO 2022077506A1
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WIPO (PCT)
Prior art keywords
resource
sequence
terminal
feedback
resources
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PCT/CN2020/121690
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English (en)
French (fr)
Inventor
郭文婷
苏宏家
董蕾
何畅
卢磊
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/121690 priority Critical patent/WO2022077506A1/zh
Priority to EP21879077.2A priority patent/EP4221273A1/en
Priority to PCT/CN2021/110846 priority patent/WO2022078030A1/zh
Priority to CN202180070157.XA priority patent/CN116530189A/zh
Publication of WO2022077506A1 publication Critical patent/WO2022077506A1/zh
Priority to US18/300,635 priority patent/US20230254820A1/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
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • 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
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • 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
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/563—Allocation or scheduling criteria for wireless resources based on priority criteria of the wireless resources

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a method and apparatus for assisting resource reselection and a method and apparatus for resource reselection.
  • the fourth generation ( 4th generation, 4G) communication system Long Term Evolution (Long Term Evolution) , LTE) communication system
  • fifth generation ( 5th generation, 5G) communication system can support communication between devices and devices (Device to Device, D2D).
  • This communication method is called sidelink communication, and the connection established between two devices is a sidelink.
  • a device that supports sidelink communication is referred to as a sidelink device hereinafter.
  • V2X vehicle to everything
  • V2X is mainly used to realize vehicle to vehicle (V2V), roadside infrastructure (infrastructure), pedestrian (pedestrian), network (network), etc.
  • HARQ Hybrid Automatic Repeat Request
  • the receiving end can feed back the corresponding sidelink data through PSFCH according to the decoding result of the signal received on the PSSCH channel.
  • Response message eg ACK/NACK.
  • the sender needs to send resource reservation information to the receiver, and the sender needs to send sidelink control information (Sidelink Control Information, SCI) to perform listening, and after the resources that have been reserved by other transmitters and whose reference signal received power is greater than the preset threshold are deleted from the candidate resource pool, the available resources are selected for resource reservation.
  • SCI Sidelink Control Information
  • the two senders are far apart and cannot listen to each other's SCI sent by each other, the resources reserved by the two senders to the receiver may overlap, resulting in resource conflict.
  • the sending resources of the sidelink data sent by the two senders conflict, the receiver will only feed back the response message corresponding to the sidelink data through the PSFCH.
  • the sender cannot know the resource conflict, and continues to resend the sidelink data on the reserved resources.
  • the resource conflict problem cannot be resolved.
  • the present application provides a method and device for resource reselection assistance and a method and device for resource reselection, which can be applied to D2D or Internet of Vehicles V2X, etc., or can be used in fields such as intelligent driving and intelligent Internet-connected vehicles.
  • an embodiment of the present application provides a method for assisting resource reselection, and the execution subject of the method may be a terminal, a combined device or component with a terminal function, or a communication chip (for example, a processor, a baseband chip, or a system-on-a-chip, etc.).
  • the method includes: receiving control information from a first terminal, the control information indicating a first resource and a second resource, the first resource carrying first data corresponding to the control information, and the second resource being the The sending resource reserved by the first terminal; determining that the second resource satisfies the reselection condition, and sending indication information to the first terminal, where the indication information is used to instruct reselection of the second resource.
  • the device executing the method determines that the second resource indicated by the control information satisfies the reselection condition, and can determine whether there is a resource conflict in the second resource reserved by the first terminal. After determining that the second resource satisfies the reselection condition, send indication information to the first terminal, where the indication information is used to instruct reselection of the second resource, so that when it is determined that there is a resource conflict in the second resource, the first terminal can be instructed to reselect the first terminal in time.
  • the second resource prevents the first terminal from continuing to use the second resource to send data, thereby solving the problem of resource conflict and improving the efficiency of resource selection.
  • control information includes resource reselection trigger information, where the resource reselection trigger information is used to trigger the resource reselection assistance; and/or, the method further includes: receiving resources Reselection enabling information, the resource reselection enabling information is used to enable the resource reselection assistance.
  • the apparatus for executing the method can determine whether to perform resource reselection assistance according to various methods. Specifically, when receiving the resource reselection triggering information sent by the first terminal through the control information, triggering the method provided by the embodiment of the present application The method for assisting resource reselection, and/or, when receiving resource reselection enabling information, determining that the resource pool where the resource indicated by the control information is located enables resource reselection, and performing resource reselection assisting.
  • the determining that the second resource satisfies the reselection condition includes: determining that the second resource and the third resource overlap, and the priority of the third resource is higher than that of the second resource the priority of resources; or determine that the second resource and the third resource overlap, and determine that the number of decoding failures of the first resource is greater than or equal to a first preset threshold; or determine that the second resource and the third resource overlap, and Determine that the priority of the third resource is higher than the priority of the second resource, and the priority of the third resource is higher than a preset priority threshold; or determine that the second resource and the third resource overlap, and determine the fourth resource
  • the signal power measurement value on the first resource is greater than the signal power measurement value on the first resource; or it is determined that the second resource and the third resource overlap, and it is determined that the signal power measurement value on the fourth resource is greater than a preset threshold, the signal power The measurement value may be an RSRP measurement result; wherein, the third resource is a transmission resource reserved by the second terminal, and
  • the apparatus for executing the method can timely determine whether there is resource conflict in the transmission resources reserved by multiple terminals, so as to prevent multiple terminals from using overlapping transmission resources to transmit data.
  • the indication information is a first sequence and a second sequence; wherein the first sequence is used to carry the acknowledgment response ACK corresponding to the first resource, and the second sequence is used to carry The negative acknowledgement corresponding to the first resource responds to NACK; or, the indication information is a third sequence, and the third sequence is different from the first sequence and the second sequence.
  • the embodiment of the present application provides various forms of indication information.
  • the indication information may be a first sequence used to carry an ACK corresponding to the first resource and a second sequence used to carry a NACK corresponding to the first resource , or the indication information may be a third sequence; thus, different forms of indication information can be flexibly used in different business scenarios, and the flexibility of the resource reselection assistance method is improved.
  • the indication information is a first sequence and a second sequence
  • the sending the indication information to the first terminal includes: sending the first sequence on feedback resources in the first feedback resource set A sequence and a second sequence; wherein the first feedback resource set includes feedback resources corresponding to the first resources in the resources occupied by the physical sideline feedback control channel PSFCH.
  • the apparatus for executing the method sends the first sequence and the second sequence on the feedback resources in the first feedback resource set at the same time , instructing the first terminal to reselect the second resource.
  • the indication information is a third sequence
  • the sending the indication information to the first terminal includes: sending the third sequence on the first feedback resource in the first feedback resource set ; wherein the first feedback resource coincides with the frequency domain of the feedback resource used to carry the first sequence or the second sequence, and the phase of the third sequence is relative to the phase of the first sequence or the The second sequence is phase offset by a first reference value; or the third sequence is sent on the second feedback resource in the first feedback resource set; wherein the second feedback resource is the same as the one used to carry the first feedback resource.
  • the feedback resources of the sequence or the second sequence are adjacent in the first feedback resource set, and the phase of the third sequence is the same as the phase of the first sequence or the phase of the second sequence; wherein, the The first feedback resource set includes feedback resources corresponding to the first resources in the resources occupied by the physical sideline feedback control channel PSFCH.
  • the indication information is a third sequence
  • the sending the indication information to the first terminal includes:
  • the third sequence is sent on the feedback resources in the second feedback resource set; the index of the third sequence satisfies: PID is the physical layer source address identifier carried in the control information, M ID is the identifier of the indication information, is the number of sequences that can be transmitted by feedback resources in the second feedback resource set; wherein, the second feedback resource set includes bits with a bit value of 0 in the bitmap corresponding to the resources occupied by the physical sideline feedback control channel PSFCH corresponding feedback resources.
  • the device executing the method can select different ways to send the third sequence according to different service scenarios, thereby improving the performance of the resource reselection assistance method. flexibility.
  • an embodiment of the present application also provides a method for resource reselection, where the execution subject of the method may be a terminal, a combined device or component with a terminal function, or a communication chip (for example, a processor, a baseband chip, or a system-on-a-chip, etc.).
  • the method includes: sending control information to a third terminal, where the control information indicates a first resource and a second resource, the first resource carries first data corresponding to the control information, and the second resource is the first resource.
  • the device executing the method when the device executing the method receives the indication information sent by the third terminal, it determines that the second resource satisfies the reselection condition, and performs resource reselection on the second resource, thereby preventing the resource caused by sending data through the second resource. conflict, thereby improving the accuracy and efficiency of sending data.
  • control information further includes resource reselection trigger information, where the resource reselection trigger information is used to trigger the third terminal to perform resource reselection assistance.
  • control information sent by the apparatus for executing the method may further include resource reselection trigger information, which is used to trigger the third terminal to perform resource reselection assistance, so as to notify the third terminal to judge whether the second resource indicated by the control information satisfies the The reselection condition is used to assist the apparatus for executing the method to perform resource reselection.
  • the receiving the indication information sent by the third terminal includes: receiving the first sequence and the second sequence sent by the third terminal; wherein the first sequence is used to transmit the first sequence The positive acknowledgement response ACK corresponding to the resource, the second sequence is used to transmit the negative acknowledgement response NACK corresponding to the first resource; or receive the third sequence sent by the third terminal; the third sequence is the same as the third sequence. A sequence is different from the second sequence.
  • the embodiment of the present application provides various forms of indication information.
  • the indication information may be a first sequence used to carry an ACK corresponding to the first resource and a second sequence used to carry a NACK corresponding to the first resource , or the indication information may be a third sequence; so that the device executing the method can flexibly receive indication information in different forms in different business scenarios.
  • the embodiments of the present application also provide a method for resource reselection, where the execution subject of the method may be a terminal, a combined device or component with terminal functions, or a communication chip (for example, a processor, a baseband chip, or a system-on-a-chip, etc.).
  • the method includes: sending control information to a third terminal, where the control information indicates a first resource and a second resource, the first resource carries first data corresponding to the control information, and the second resource is the first resource.
  • a transmission resource reserved by a terminal determining that the number of times of receiving a negative acknowledgement response NACK corresponding to the first resource is greater than a preset threshold; and performing resource reselection on the second resource.
  • the device performing the method determines that there is a resource conflict for the second resource, and performs resource reselection for the second resource.
  • the apparatus for executing the method judges whether to perform resource reselection according to the number of NACKs corresponding to the received first resource, so as to prevent the resource conflict from causing the third terminal to fail to decode the first resource, the apparatus for executing the method still uses the second resource to send data.
  • an embodiment of the present application further provides a communication device, where the communication device has a function of implementing the method of the first aspect.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device includes a receiving unit, a processing unit and a sending unit, and these units can perform the corresponding functions in the method example of the first aspect. For details, please refer to the detailed description in the method example, here I won't go into details.
  • an embodiment of the present application further provides a communication device, where the communication device has the function of implementing the method of the second aspect.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device includes a receiving unit, a processing unit and a sending unit, and these units can perform the corresponding functions in the method example of the second aspect. For details, please refer to the detailed description in the method example, here I won't go into details.
  • an embodiment of the present application further provides a communication device, where the communication device has the function of implementing the method of the third aspect.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device includes a processing unit and a sending unit, and these units can perform the corresponding functions in the method example of the third aspect. For details, please refer to the detailed description in the method example, which will not be repeated here. .
  • the communication device in the above aspect may be a terminal, and may also be a chip applied in the terminal or other combined devices, components, etc. that can realize the functions of the above terminal.
  • the transceiver module may be a transmitter and a receiver, or an integrated transceiver, which may include an antenna and a radio frequency circuit, and the processing module may be a processor, such as a baseband chip.
  • the transceiver module may be a radio frequency unit
  • the processing module may be a processor.
  • the transceiver module can be an input and output interface of the chip system
  • the processing module can be a processor in the chip system, such as a central processing unit (central processing unit, CPU).
  • an embodiment of the present application further provides a communication device, the structure of the communication device includes a communication module, a processor, and a memory, and the processor is configured to support the communication device to perform the above-mentioned first aspect.
  • the memory is coupled to the processor and stores necessary program instructions and data.
  • the communication module is used to communicate with other devices.
  • an embodiment of the present application further provides a communication device, the structure of the communication device includes a communication module, a processor, and a memory, and the processor is configured to support the communication device to perform the second aspect or Corresponding functions in the method provided by the third aspect.
  • the memory is coupled to the processor and stores necessary program instructions and data.
  • the communication module is used to communicate with other devices.
  • the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium runs on a computer, the computer executes the methods provided in the first to third aspects above. all or part of the steps.
  • the present application further provides a computer program product comprising instructions, which, when run on a computer, cause the computer to execute all or part of the steps in the methods provided in the first to third aspects above.
  • FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a DRX cycle provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a network device scheduling mode according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of resource interception performed by a transmitter according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a bitmap of a network device indicating PSSCH time domain resources according to an embodiment of the present application
  • FIG. 6 is a schematic diagram of a network device indicating PSSCH frequency domain resources according to an embodiment of the present application
  • FIG. 7 is a schematic diagram of a time slot occupied by a PSFCH according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a bitmap of a PSFCH frequency domain resource provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a time interval between a PSSCH time slot and a PSFCH time slot provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a PSSCH resource and a corresponding PSFCH provided by an embodiment of the present application;
  • FIG. 11 is a flowchart of a method for assisting resource reselection provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a terminal reserving multiple PSSCH resources in one transmission cycle according to an embodiment of the present application
  • FIG. 14 is a schematic structural diagram of a communication apparatus 1400 according to an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a communication apparatus 1500 according to an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a communication apparatus 1600 according to an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a communication apparatus 1700 according to an embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of a communication apparatus 1800 according to an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a communication apparatus 1900 according to an embodiment of the present application.
  • Terminal devices including devices that provide voice and/or data connectivity to users, for example, may include handheld devices with wireless connectivity, or processing devices connected to wireless modems.
  • the terminal equipment may communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, vehicle-to-everything (V2X) Terminal equipment, machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal) , user agent, or user device, etc.
  • UE user equipment
  • D2D device-to-device
  • V2X vehicle-to-everything
  • M2M/MTC machine-to-machine/machine-type communications
  • IoT Internet of things
  • subscriber unit subscriber unit
  • subscriber station subscriber station
  • mobile station mobile station
  • remote station remote station
  • access point access point
  • AP remote terminal
  • remote terminal
  • these may include mobile telephones (or "cellular" telephones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, computer-embedded mobile devices, and the like.
  • mobile telephones or "cellular" telephones
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • constrained devices such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc.
  • it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), and laser scanners.
  • RFID radio frequency identification
  • GPS global positioning system
  • V2X devices can be considered as V2X devices if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle).
  • the terminal device may be referred to as a terminal or a UE for short.
  • Side Link which can be applied to D2D communication and V2X communication scenarios.
  • Sidelink communication is based on the PC5 interface, and the resources used by the two can be collectively referred to as sidelink resources.
  • V2X in version (Rel)-14/15/16, V2X as a major application of device-to-device (D2D) technology was successfully established.
  • V2X will optimize the specific application requirements of V2X on the basis of the existing D2D technology. It is necessary to further reduce the access delay of the terminal and solve the problem of resource conflict.
  • V2X specifically includes vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and Several application requirements such as vehicle-to-network (V2N) communication interaction.
  • V2V refers to communication between vehicles
  • V2P refers to communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers)
  • V2I refers to communication between vehicles and network devices, such as roadside units (road side unit, RSU), there is also a V2N that can be included in V2I
  • V2N refers to the communication between the vehicle and the base station/network.
  • SL communication scenarios such as D2D scenarios (which can be NR D2D scenarios or LTE D2D scenarios, etc.), or, for example, V2X scenarios (which can be NR V2X scenarios or LTE V2X scenarios, etc. ), and can also be applied to other scenarios or other communication systems, and there is no specific limitation.
  • D2D scenarios which can be NR D2D scenarios or LTE D2D scenarios, etc.
  • V2X scenarios which can be NR V2X scenarios or LTE V2X scenarios, etc.
  • FIG. 1 is a network architecture applied in this embodiment of the present application.
  • the network architecture shown in FIG. 1 includes network equipment and multiple terminals (terminal 1 and terminal 2 shown in FIG. 1 ). The following takes the terminal 1 and the terminal 2 as examples for description.
  • Both terminals may be covered by network equipment, or only terminal 1 may be covered by network equipment, and terminal 2 may not be covered by network equipment, or the two terminals may be covered by different network equipment.
  • the two terminals can communicate through SL.
  • FIG. 1 takes as an example that both terminals are covered by one network device shown in FIG. 1 . Among them, these two terminals are V2X devices. Of course, the number of terminals in FIG. 1 is just an example. In practical applications, a network device may provide services for multiple terminals. Wherein, the network device may be a base station.
  • a DRX cycle defines the activation time (Active Time).
  • Active Time includes the DRX on time period (DRX On Duration) and the possible time period for entering DRX (opportunity for DRX), where DRX On Duration is The time period during which the terminal needs to monitor and receive data sent by the Physical Downlink Control Channel (PDCCH), opportunity for DRX is the time period during which it is possible to enter the DRX, which can be configured by the network device.
  • DRX On Duration the DRX on time period
  • DRX On Duration The time period during which the terminal needs to monitor and receive data sent by the Physical Downlink Control Channel (PDCCH)
  • PDCCH Physical Downlink Control Channel
  • opportunity for DRX is the time period during which it is possible to enter the DRX, which can be configured by the network device.
  • the network equipment completes the downlink synchronization process with the terminal through the downlink synchronization signal and system configuration, and the terminal accesses the network equipment through the uplink synchronization to complete the uplink synchronization process with the base station.
  • the terminal When the terminal needs to save energy, it reports an energy saving request to the network device, and the network device configures the DRX cycle and other related parameters for the terminal in response to the energy saving request, and completes the DRX configuration for the terminal.
  • the SL connection is mainly composed of the Physical Sidelink Control Channel (PSCCH), the Physical Sidelink Shared Channel (PSSCH), and the Physical Sidelink Broadcast Channel (PSBCH). ) and a physical sidelink feedback control channel (Physical Sidelink Feedback control Channel, PSFCH).
  • PSCCH is used to transmit sidelink control information (SCI)
  • PSSCH channel is used to transmit data
  • PSBCH carries MIB-V2X from the RRC layer
  • PSFCH is used to carry the feedback information sent by the receiving end to the transmitting end on the SL. It can be an ACK/NACK form that sends an Acknowledge character (ACK) or a Negative Acknowledge character (NACK), or a NACK-only form that only sends NACK.
  • ACK Acknowledge character
  • NACK Negative Acknowledge character
  • PSFCH feedback ACK/NACK can be used in unicast and multicast scenarios.
  • a sender and a receiver form a unicast connection pair.
  • the receiver After receiving a control message sent from the sender, the receiver determines that it needs to send the message to the sender according to the HARQ enable indication information in the control information.
  • the terminal feeds back ACK/NACK; if the receiving end determines that the received PSSCH can be correctly decoded, it sends a PSFCH sequence carrying ACK information to the transmitting end; otherwise, it feeds back a PSFCH sequence carrying NACK information.
  • Multicast scenarios can be divided into multicast 1 scenarios (NACK-only) and multicast 2 scenarios (NACK/ACK).
  • the multicast 1 scenario if the terminal in the group can decode the PSCCH correctly, but the PSSCH corresponding to the PSCCH fails to decode, the PSFCH sequence carrying the NACK information is fed back, otherwise no information is fed back.
  • the multicast 2 scenario if the terminal in the group can decode the PSCCH correctly, according to the HARQ enable information in the control information, if the decoding of the PSSCH corresponding to the PSCCH fails, the PSFCH sequence carrying the NACK information is fed back, otherwise, the feedback carries the ACK information on the PSFCH sequence.
  • the terminal When the terminal performs SL communication, it needs to determine the transmission resources of the PSSCH. Specifically, the terminal sends the first-level control information on the PSCCH, and sends the second-level control information and the first data on the PSSCH; the first-level control information carries the PSCCH.
  • the frequency domain resource information of the corresponding PSSCH is used to indicate the size of the PSSCH frequency domain resource.
  • PSCCH and its corresponding PSSCH are sent in the same time slot in the time domain, and the starting position of the resources in the frequency domain is the same. Therefore, after the receiving terminal blindly detects the PSCCH, according to the time-frequency domain starting position of the PSCCH and the first
  • the PSSCH can be decoded by using the frequency domain resource information of the PSSCH in the stage control information.
  • the transmission resources of the PSSCH are mainly determined through two communication modes, the base station scheduling mode and the autonomous selection mode.
  • the base station scheduling mode is used for SL communication within the coverage of the base station.
  • the terminal uses the scheduled time-frequency resource as the PSSCH transmission resource, and sends control information and data on the resource.
  • the base station scheduling mode is introduced: the base station centrally allocates resources according to the Buffer Status Report (BSR) of the terminal. Specifically, the base station will inform the sender of the time-frequency resources of the sideline data through downlink control information (Downlink Control Information, DCI). , SCI) and data.
  • DCI Downlink Control Information
  • SCI Downlink Control Information
  • the lateral transmission resources of each terminal are uniformly scheduled by the base station, which can avoid collision.
  • the terminal In the autonomous selection mode, the terminal automatically selects the time-frequency resources of the PSSCH from the available time-frequency resources included in the SL communication resource pool, and sends control information and data on the selected resources. In this mode, the terminal selects resources based on the result of its own listening, and no longer depends on the scheduling of the base station. Since the autonomous selection mode is not limited by network coverage, the sender can also use this mode to communicate without network coverage. The following describes the specific method for the terminal to perform resource interception in the autonomous selection mode:
  • the sender triggers resource selection at time slot n, and the resource listening window can be defined as T time slots before the resource selection is triggered.
  • the resource selection window is the time slot corresponding to [n+T1,n+T2] after the resource selection is triggered.
  • the sender listens to the SCIs sent by other terminals in the frequency domain resource pool within the resource listening window. If the monitored SCI includes resources that have been reserved by other terminals, and the reserved resources are located in the resource selection window [n+T1, n+T2], the transmitting end performs PSSCH reference signal received power ( Reference Signal Received Power, RSRP) measurement, if the measurement result is higher than the preset RSRP threshold Th RSRP , the candidate resource is excluded from the resource selection window.
  • PSSCH reference signal received power Reference Signal Received Power
  • the Th RSRP is determined according to the priority corresponding to the data indicated in the received SCI and the priority corresponding to the data to be sent at the transmitting end.
  • the sender selects transmission resources from the remaining candidate resource sets. For example, in the resource listening window as shown in FIG. 4 , the sender hears SCIs sent by other terminals on resource 1, resource 2 and resource 3 and its PSSCH-RSRP exceeds Th RSRP . Then, the sender excludes these resources in resource selection, and selects resources from resources other than resources 1, 2, and 3 in the resource selection window as shown in FIG. 4 for sideline transmission. The sender selects transmission resources based on the listening result, and sends control information and data to the receiver on the selected resources.
  • the time-frequency resource selection performed by the terminal is configured based on the SL communication resource pool.
  • the SL communication resource pool is a collection of time domain resources and frequency domain resources for SL communication.
  • the network device indicates the set of subframes available for SL communication through a periodically repeated bitmap. For example, as shown in Figure 5, assuming that the length of a periodic bitmap is 8 bits, and SL transmission in each subframe occupies a fixed number of M orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbols, then define M is the transmission duration of one SL, and M may also be referred to as a time-domain transmission unit.
  • OFDM Orthogonal frequency division multiplexing
  • the network device divides the frequency band used for SL communication into several sub-channels, and each sub-channel contains a certain number of physical resource blocks (Physical Resource Blocks, PRBs).
  • PRBs Physical Resource Blocks
  • the network device indicates the sequence number of the first PRB of the frequency resource used for SL communication, the total number N of subchannels included in the communication resource pool, and the number n CH of PRBs included in each subchannel. It should be noted that one transmission of SL communication may occupy one or more sub-channels.
  • PSFCH Physical layer HARQ-ACK feedback
  • HARQ feedback information is sent through PSFCH. That is, for a PSSCH transmission, if the sender carries the HARQ-ACK feedback enable information in the control information, the receiver needs to feed back the corresponding ACK/NACK information according to the PSSCH decoding result, wherein the ACK/NACK information is transmitted through the PSFCH channel.
  • the PSFCH channel resource is a periodic resource configured in the resource pool, and its periodic configuration parameter Can be 0, 1, 2, 4.
  • PSFCH feedback resources are configured for each PSSCH subchannel.
  • the specific method for determining the PSFCH resources corresponding to each PSSCH subchannel is as follows: :
  • the resource pool is configured with a bitmap (bitmap) of the PSFCH frequency domain resources to indicate whether the PRBs on the frequency domain resources where the resource pool is located can be used as PSFCH resources, that is, the length of the bit information contained in the bitmap is the same as the number of bits in the resource pool.
  • the number of PRBs is equal, and a bit value of 1 in the bitmap indicates that the corresponding PRB can be used for PSFCH transmission, and a bit value of 0 indicates that the corresponding PRB resource cannot be used for PSFCH transmission.
  • the bitmap indicates that the first 4 PRBs of each subchannel can be used for PSFCH feedback.
  • the receiving end cannot perform feedback immediately after receiving the PSSCH, so a time interval K for PSSCH feedback is defined, that is, the PSSCH transmits the PSFCH on the first available time slot containing the PSFCH resource.
  • the slot and the time slot where the PSSCH is located are separated by at least K time slots, and the value of K is configured by the resource pool.
  • time slots 2 to 5 can be called a PSSCH binding window length.
  • the available PSFCH resources in a PSFCH feedback time slot are sequentially allocated to each PSSCH sub-channel in the feedback period according to the manner of PSSCH resources first in the time domain and then in the frequency domain.
  • the PSFCH resources corresponding to each PSSCH subchannel in the 4 bound PSSCH time slots are as shown in the numbers in Figure 10 , that is, a PRB PSFCH feedback resource is allocated for each PSSCH subchannel in each time slot.
  • the formula is expressed as, for the i-th time slot in the N bound PSSCH time slots, if the frequency domain subchannel number in the resource pool is j; then the corresponding PSFCH resource is:
  • Equation 2 expresses the allocation for each PSSCH subchannel for each slot PRB resources corresponding to consecutive bits 1, where 0 ⁇ j ⁇ N subch -1, for example, referring to Figure 10, at this time 0 ⁇ i ⁇ 3, 0 ⁇ j ⁇ 2, the user occupies one PSSCH subchannel for transmission, as shown in the frequency domain subchannel numbered 5 in Figure 10.
  • the corresponding PSFCH resource is the PRB numbered 5 in the figure.
  • PSFCH is a ZC sequence based on a low peak-to-average ratio
  • the specific sequence generation method is to generate a basic sequence r(n) according to the sequence length, 0 ⁇ n ⁇ M ZC ; wherein, M ZC is the sequence length.
  • each PSFCH sequence is code-division multiplexed and sent on one PRB.
  • a terminal is allocated at least two sequences, corresponding to different phase rotation values ⁇ respectively.
  • phase rotation value ⁇ can be determined according to the following formula:
  • m 0 represents the phase of the PSFCH sequence used to transmit ACK
  • m cs represents the phase offset of the PSFCH sequence used to transmit NACK relative to the PSFCH sequence used to transmit ACK.
  • NR-V2X supports physical layer PSFCH feedback in unicast and multicast scenarios. For different service types, the value of m cs is determined according to Table 1 and Table 2.
  • the resource pool can also be configured by Limit the number of PSFCH resources that can be used by the receiver of the PSSCH. There are two options:
  • the receiver of the PSSCH can only use the PSFCH resource corresponding to its first subchannel, that is, For example, in the schematic diagram of PSFCH resource allocation shown in FIG. 10 , when the PSSCH occupies two subchannels numbered 5 and 9 to transmit data, the receiving end of the PSSCH can only use the PSFCH resource numbered 5 for feedback.
  • the receiving end of the PSSCH can use the PSFCH resources corresponding to all its sub-channels for feedback, that is,
  • the receiver selects the A PSFCH resource is fed back to the PSFCH for the corresponding resource, where the P ID represents the physical layer source address identifier carried in the control information.
  • m 0 corresponding to the PSFCH sequence is:
  • the PID represents the physical layer source address identifier carried in the control information
  • the M ID is the identifier used to receive the data sent by the sender
  • the sender needs to send resource reservation information to the receiver before the PSSCH transmits the SL data.
  • the transmitter listens to the SCIs sent by other transmitters in the frequency domain resource pool within the resource listening window, and deletes the resources that other transmitters have reserved and whose reference signal received power is greater than the preset threshold from the candidate resource pool, and then Select available resources to make resource reservations.
  • the resources reserved by the two senders to the receiver may overlap, resulting in resource conflict.
  • the resource overlap may be partial sub-channel overlap, or all resources overlap.
  • the receiver When the sending resources of the SL data sent by the two senders collide, the receiver will only feed back the response message corresponding to the SL data through the PSFCH. The sender cannot know the resource conflict, and continues to resend the SL data on the reserved resources. Thus, the resource conflict problem cannot be resolved.
  • the embodiments of the present application provide an auxiliary method for resource reselection to solve the problem of resource conflict.
  • the execution subject of the method may be a terminal, a combined device or component with terminal functions, or a communication chip (eg, a processor, a baseband chip, or a chip system, etc.) applied in the terminal.
  • a communication chip eg, a processor, a baseband chip, or a chip system, etc.
  • the following description takes the execution subject of the method as a terminal as an example. As shown in FIG. 11 , the method includes the following steps:
  • the first terminal sends first control information to a third terminal.
  • the first control information sent by the first terminal is used to indicate the first resource and the second resource, wherein the first resource carries the first data corresponding to the first control information, and the second resource is reserved by the first terminal
  • the resource specifically, the second resource is located after the first resource in time, and is a resource reserved by the first terminal for sending data in the next sending cycle.
  • the third terminal determines that resource reselection assistance is required.
  • the need to perform resource reselection assistance means that the third terminal needs to determine whether there is a resource conflict in the second resource of the first terminal, and send the first indication information to the first terminal when it is determined that there is a resource conflict in the second resource.
  • the need for resource reselection assistance is determined according to at least one of the following methods:
  • the first control information includes resource reselection trigger information, where the resource reselection trigger information is used to trigger the third terminal to perform resource reselection assistance.
  • the first control information includes resource reselection trigger information, indicating that the first terminal needs the assistance of a third terminal to perform resource reselection.
  • the third terminal receives resource enabling information, where the resource reselection enabling information is used to enable the resource reselection assistance.
  • the resource reselection enabling information is sent to the third terminal, so that after receiving the resource reselection enabling information, the third terminal determines that it is necessary to assist the first resource The terminal performs resource reselection.
  • the third terminal determines that the second resource satisfies the reselection condition.
  • the third terminal receives the second control information from the second terminal, wherein the second control information indicates a third resource and a fourth resource, wherein the fourth resource carries the second data corresponding to the second control information, and the second control information indicates the third resource and the fourth resource.
  • the three resources are transmission resources reserved by the second terminal.
  • the third terminal determines that the second resource and the third resource overlap, specifically, the second resource and the third resource overlap or partially overlap, and determine that the second resource satisfies the reselection condition according to at least one of the following methods:
  • Manner 1 The priority of the third resource is higher than the priority of the second resource.
  • the priority ranges from 1 to 8, where a priority value of 1 indicates the highest priority, and a priority value of 8 indicates the lowest priority.
  • the priority is Receive control information or data sent by a resource with a higher priority. If the priority value of the second resource is 5 and the priority value of the third resource is 2, it is determined that the priority of the third resource is higher than the priority of the second resource, and it is determined that the second resource satisfies the reselection condition.
  • Manner 2 The third terminal determines that the number of decoding failures of the first resource is greater than or equal to a first preset threshold.
  • the first preset threshold is a positive integer greater than 0.
  • the first preset threshold is 1, it means that when the third terminal determines that the decoding of the first resource fails, it determines that the second resource satisfies the reselection condition; when the first preset threshold is N, it means that the third terminal determines that the first resource When the number of consecutive decoding failures is greater than or equal to N times, it is determined that the second resource satisfies the reselection condition.
  • Mode 3 The third terminal determines that the priority of the third resource is higher than the priority of the second resource, and the priority of the third resource is higher than a preset priority threshold; wherein, the third resource is reserved by the second terminal. Send resources.
  • the preset priority threshold is the priority threshold preconfigured for the third terminal, and when the priority of the reserved resources of the terminal is higher than the priority threshold, the terminal is given priority to occupy the reserved resources.
  • the third terminal determines that the signal power measurement value on the fourth resource is greater than the signal power measurement value on the first resource, and the signal power measurement value may be an RSRP measurement result.
  • Manner 5 The third terminal determines that the signal power measurement value on the fourth resource is greater than a preset threshold.
  • the second resource may be determined that the second resource satisfies the reselection condition according to any one of the above manners 1 to 5, or it may be determined that the second resource satisfies the reselection condition according to two or more manners.
  • the third terminal determines the signal power on the fourth resource.
  • the measured value is greater than the measured value of the signal power on the first resource, and the measured value of the signal power on the fourth resource is greater than the preset threshold, it is determined that the second resource satisfies the reselection condition.
  • the third terminal when the third terminal determines that the second resource satisfies the reselection condition, that is, determines that there is a resource conflict for the second resource, the third terminal needs to instruct the first terminal to perform resource reselection for the second resource.
  • the resource reselection means that the first terminal relists and selects the resources in the resource pool, so that the reselected resources are used as the second resources.
  • the third terminal sends first indication information to the first terminal, where the first indication information is used to instruct to reselect the second resource.
  • the third terminal determines the time-frequency resource used for sending the first indication information according to the following manner:
  • the time domain resources used by the third terminal to send the first indication information occupy the last two OFDM symbols before the last GAP in the time slot where the PSFCH is located.
  • the bitmap of the PSFCH frequency domain resources configured in the resource pool is used to determine the transmission resources that can be used as the PSFCH, and the bit value in the bitmap is 1.
  • the PRB corresponding to the bit can be used for PSFCH transmission, and a bit value of 0 indicates that the PRB corresponding to the bit cannot be used for PSFCH transmission.
  • the set of PRBs corresponding to the first resource in the PRB resource set corresponding to the bit with a bit value of 1 is called the first feedback resource set
  • the set of PRBs corresponding to the bit with a bit value of 0 is called the first feedback resource set.
  • the set is called the second feedback resource set.
  • a PSFCH feedback resource of a PRB is allocated for each PSSCH subchannel of each time slot. If the control information sent by the first terminal indicates that the first resource occupies the PSSCH subchannels numbered 5 and 9 in the figure, the first resource corresponds to The PRBs are 5 and 9, that is, the first feedback resource set includes the PRBs numbered 5 and 9 in FIG. 10 .
  • the PSFCH occupies OFDM symbols numbered 11 and 12, and in its corresponding frequency domain resources, the set composed of PRBs corresponding to bits with a bit value of 0 is called the second feedback resource set, as shown in Figure 8
  • the PRBs in the dotted box constitute the second feedback resource set.
  • the first indication information is a first sequence and a second sequence; the first sequence is used to transmit the positive response ACK corresponding to the first resource, and the second sequence is used to transmit the negative response corresponding to the first resource. Acknowledgments respond with NACK.
  • the third terminal when the third terminal can correctly decode the first resource, it feeds back ACK to the first terminal through the first sequence; otherwise, it feeds back NACK to the first terminal through the second sequence.
  • the third terminal determines that the second resource satisfies the reselection condition, it sends the first sequence and the second sequence to the first terminal at the same time.
  • first sequence and the second sequence are sent on corresponding PRB resources in the first feedback resource set.
  • the first indication information is a third sequence
  • the third sequence is different from the first sequence and the second sequence.
  • the third sequence may be sent in the following manner:
  • Mode 1 Send a third sequence on the first PRB in the first feedback resource set; where the first PRB is the same as the PRB carrying the first sequence and the second sequence, and the phase of the third sequence is relative to the first sequence or the second sequence The sequence phase is offset by the first reference value.
  • the sequence phase may specifically be the phase rotation value ⁇ .
  • the value of the phase rotation value ⁇ may be determined by m 0 and/or m cs , where m 0 may be a pair of PSFCH sequences on the PRB The phase of the first sequence in the pair, m cs is the phase offset of the second sequence relative to the first sequence in the PSFCH sequence pair.
  • a possible implementation is, for example, in the multicast 1 scenario, if the user terminal in the group can correctly decode the PSCCH corresponding to the PSSCH, but the PSSCH decoding fails, the PSFCH sequence carrying the NACK information is fed back, otherwise no information is fed back.
  • the PRBs in the first feedback resource set configured in the resource pool can multiplex multiple PSFCH sequence pairs, that is, And the third terminal only uses the first sequence and the second sequence on the first PRB, the PSFCH sequence on the first PRB other than the first sequence and the second sequence can be used as the third sequence, such as the third sequence.
  • the phase is offset by the first reference value relative to the phase of the first sequence or the second sequence, specifically, the m 0 of the third sequence is different from that of the first sequence and the second sequence, and the third sequence is different from the first sequence or the second sequence.
  • Mode 2 Send a third sequence on the second PRB in the first feedback resource set; wherein the second PRB and the first PRB are adjacent to the first feedback resource set, and the third sequence is the same as the first sequence or the second sequence. Phase is the same.
  • the third sequence is sent on a second PRB adjacent to the first PRB in the first feedback resource set.
  • the fact that the first PRB is adjacent to the second PRB means that the first PRB is adjacent to the first feedback resource set.
  • Logically adjacent For example, in a unicast scenario, if the index of the first PRB is x, the index of the second PRB is or x1 represents the first available PRB whose PRB index is greater than x in the first feedback resource set, and x2 represents the first available PRB whose PRB index is less than x in the first feedback resource set. in, indicates that it can be used PSFCH resources corresponding to each PSSCH subchannel; Indicates the number of PRBs that can be used as PSFCH resources corresponding to each PSSCH subchannel.
  • the fact that the first PRB and the second PRB are adjacent in the first feedback resource set means that the first PRB and the second PRB are logically adjacent in the first feedback resource set.
  • the first feedback resource set includes PRBs numbered 5 and 9 in the PSFCH resources, then when the first PRB is When the PRB numbered 5 is the PRB numbered 9, the second PRB is the PRB numbered 9.
  • the phase of the third sequence may be the same as the phase of the first sequence or the second sequence, eg, the m 0 value and the m cs value of the third sequence are the same as the m 0 value and the m cs value of the first sequence or the first sequence.
  • Mode 3 Send the third sequence on the third PRB in the second feedback resource set; the index of the third sequence satisfies:
  • the PID is the physical layer source address identifier carried in the first control information, and the M ID is the identifier used by the third terminal to receive the first data, is the number of PSFCH sequences that can be transmitted by PRBs in the second feedback resource set.
  • the PSFCH sequences are arranged and coded in increasing order in the frequency domain first and then the code domain. Therefore, after the index of the third sequence is determined, the third PRB where the third sequence is located can be determined in the second feedback resource set. index, and then determine the position of the third PRB and the phase of the third sequence; the specific implementation can refer to formula 5 to formula 7, which will not be repeated here.
  • the first terminal performs resource reselection on the second resource.
  • the first terminal may re-listen in the resource pool and reselect the second resource.
  • Embodiments of the present application also provide a method for resource re-evaluation, where the execution subject of the method may be a terminal, a combined device or component with terminal functions, or a communication chip (such as a processor, a baseband, etc.) applied in the terminal. chip, or system-on-chip, etc.).
  • the execution subject of the method may be a terminal, a combined device or component with terminal functions, or a communication chip (such as a processor, a baseband, etc.) applied in the terminal. chip, or system-on-chip, etc.).
  • the execution subject of the method as a terminal as an example, as shown in FIG. 12 , the method includes the following steps:
  • the first terminal sends first control information to a third terminal.
  • the first control information indicates a first resource and a second resource
  • the first resource carries the first data corresponding to the first control information
  • the second resource is a transmission resource reserved by the first terminal.
  • the third terminal sends a NACK corresponding to the first resource to the first terminal.
  • the first terminal determines that the number of times of receiving the NACK corresponding to the first resource is greater than a second preset threshold, and performs resource reselection for the second resource.
  • the first terminal reserves PSSCH resources for multiple times in one transmission cycle to send data to the third terminal.
  • the first terminal reserves three PSSCH resources in one transmission cycle: T01, T02, T03 ; Among them, T01 is used for initial transmission, and T02 and T03 are used for retransmission of the same data.
  • a second preset threshold P is designed. If the number of times the first terminal receives the NACK feedback information corresponding to T02 is greater than P, it will stop using the T02 transmission resource in the next sending period, and perform resource reselection, and re-select available resources in the resource pool The resource replaces the T02 transmission resource.
  • the second preset threshold may be configured on the resource pool and delivered to the terminal by the resource pool; or may be the resource pool configures the corresponding relationship between the service priority and the threshold, and the third terminal queries the service priority by querying the corresponding relationship.
  • the corresponding relationship between the level and the threshold determines the threshold corresponding to its own service priority.
  • the first terminal sends control information to the third terminal, where the control information indicates the first resource and the second resource, and the first resource carries the first data corresponding to the control information,
  • the second resource is a transmission resource reserved by the first terminal.
  • the third terminal determines that the second resource satisfies the resource reselection condition, and sends the first indication information to the first terminal;
  • the first indication information is the first sequence and the second sequence, and the first sequence is used to carry the positive response corresponding to the first resource
  • the second sequence is used to carry the negative acknowledgement response NACK corresponding to the first resource.
  • the first sequence is sent on the first PRB in the first feedback resource set; at the same time, the second sequence is sent on the PRB.
  • the first terminal After simultaneously receiving the ACK and NACK corresponding to the first resource, the first terminal determines that there is a resource conflict for the second resource, and performs resource reselection for the second resource.
  • the first terminal sends control information to the third terminal, where the control information indicates the first resource and the second resource, the first resource carries the first data corresponding to the control information, and the first resource carries the first data corresponding to the control information.
  • the second resource is a transmission resource reserved by the first terminal.
  • the third terminal determines that the second resource satisfies the resource reselection condition, and sends first indication information to the first terminal, where the first indication information is a third sequence.
  • the third sequence on the first PRB in the first feedback resource set feeds back the first indication information to the first terminal.
  • the first terminal After receiving the first indication information sent by the third terminal, the first terminal determines that there is a resource conflict for the second resource, and performs resource reselection for the second resource.
  • the first terminal sends control information to the third terminal, where the control information indicates a first resource and a second resource, the first resource carries the first data corresponding to the control information, and the second resource is a sending resource reserved by the first terminal.
  • the third terminal determines that the first resource meets the reselection condition, and sends first indication information to the first terminal, where the first indication information is a third sequence.
  • a third sequence is sent on the first PRB in the first feedback resource set, where the third sequence is different from the first sequence and the second sequence.
  • the third sequence may be a PSFCH sequence other than the first sequence and the second sequence among the PSFCH sequences multiplexed on the first PRB.
  • the first terminal After receiving the first indication information sent by the third terminal, the first terminal determines that there is a resource conflict for the second resource, and performs resource reselection for the second resource.
  • the resource pool allocates the number of PRBs for PSFCH feedback for each PSSCH subchannel Indicates that the first feedback resource set includes at least two PRBs.
  • the first terminal sends control information to the third terminal, where the control information indicates a first resource and a second resource, the first resource carries the first data corresponding to the control information, and the second resource is a sending resource reserved by the first terminal.
  • the third terminal determines that the second resource meets the reselection condition, and sends first indication information to the first terminal, where the first indication information is a third sequence.
  • the third sequence is sent on a second PRB adjacent to the first PRB in the first feedback resource set. According to the foregoing, if the index of the first PRB is:
  • the index of the second PRB is or
  • the phase of the third sequence can be the same as the phase of the first sequence or the second sequence, for example, the m' 0 value of the third sequence is the same as the m 0 value of the first sequence or the first sequence, and m' 0 can be determined according to the following formula:
  • the PID represents the physical layer source address identifier carried in the control information
  • the M ID is the identifier used by the third terminal to receive the first data
  • the number of PSFCH sequences that can be transmitted by PRBs in the first feedback resource set Indicates the number of PSFCH sequence pairs that can be multiplexed on the PSFCH resource of a PRB configured in the resource pool, indicates that it can be used PSFCH resources corresponding to each PSSCH subchannel.
  • the first terminal After receiving the first indication information sent by the third terminal, the first terminal determines that there is a resource conflict for the second resource, and performs resource reselection for the second resource.
  • the first terminal sends control information to the third terminal, where the control information indicates a first resource and a second resource, the first resource carries the first data corresponding to the control information, and the second resource is reserved for the first terminal sending resources.
  • the third terminal determines that the second resource meets the reselection condition, and sends first indication information to the first terminal, where the first indication information is a third sequence.
  • the third sequence is sent on the PRBs in the second feedback resource set.
  • index of the third sequence satisfies:
  • the third sequence can determine m' 0 according to the following formula:
  • the PID is the physical layer source address identifier carried in the first control information
  • the M ID is the identifier used by the third terminal to receive the first data
  • the number of sequences that can be transmitted by sub-resources in the second feedback resource set Indicates the number of PSFCH sequence pairs that can be multiplexed on the PSFCH resource of a PRB configured in the resource pool, indicates that it can be used PSFCH resources corresponding to each PSSCH subchannel.
  • the first terminal After receiving the first indication information sent by the third terminal, the first terminal determines that there is a resource conflict for the second resource, and performs resource reselection for the second resource.
  • each terminal in the group uses a different PSFCH sequence to feed back ACK and NACK.
  • PSFCH sequence When it is equal to the number of bits whose bit value is 1, it can be implemented according to the manner provided in this embodiment.
  • each PSSCH subchannel has a corresponding PRB for sending the third sequence
  • it can be implemented according to the manner provided in this embodiment.
  • the present application also provides a communication device 1400.
  • the communication device 1400 may be a terminal, a component or component with terminal functions, or a chip (such as a baseband chip) applied in a terminal.
  • the functions or modules may be implemented by software, or by hardware, or by executing corresponding software by hardware, or by a combination of software and hardware.
  • the communication device may also be other communication modules, which are used to implement the methods in the method embodiments of the present application.
  • the structure of the communication device 1400 is shown in FIG. 14 , including a receiving unit 1401 , a processing unit 1402 and a sending unit 1403 .
  • the sending unit 1403 may be a transmitter
  • the receiving unit 1401 may be a receiver
  • the transmitter may include an antenna and a radio frequency circuit, etc.
  • the receiver may also include an antenna and a radio frequency circuit, etc.
  • the transmitter and the receiver may belong to one
  • a functional module such as a transceiver, or a transmitter and a receiver can also be independent functional modules
  • the processing unit 1402 can be a processor, such as a baseband processor, and the baseband processor can include one or more central processing units (central processing unit, CPU).
  • the sending unit 1403 and the receiving unit 1401 may be radio frequency units
  • the processing unit 1402 may be a processor, such as a baseband processor.
  • the sending unit 1403 and the receiving unit 1401 may be input and output interfaces of a chip (such as a baseband chip) (for example, the sending unit 1403 is an output interface, the receiving unit 1401 is an input interface, or the input and output are the same interface, then Both the sending unit 1403 and the receiving unit 1401 are the interface), and the processing unit 1402 may be a processor of a chip system, and may include one or more central processing units. It should be understood that the processing unit 1402 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component, the sending unit 1403 may be implemented by a transmitter or a transmitter-related circuit component, and the receiving unit 1401 may be implemented by a receiver or a receiver-related circuit component circuit component implementation.
  • a chip such as a baseband chip
  • the communication apparatus 1400 can be applied to the third terminal shown in FIG. 11 , and can implement the resource reselection assistance method provided by the foregoing embodiments.
  • the functions of each unit of the communication device 1400 will be introduced below.
  • the receiving unit 1401 is configured to receive control information from a first terminal, wherein the control information indicates a first resource and a second resource, the first resource carries the first data corresponding to the control information, and the first resource carries the first data corresponding to the control information.
  • the resources are the transmission resources reserved by the first terminal;
  • the processing unit 1402 configured to determine that the second resource satisfies a reselection condition
  • the sending unit 1403 is configured to send indication information to the first terminal, where the indication information is used to instruct reselection of the second resource.
  • control information includes resource reselection trigger information, wherein the resource reselection trigger information is used to trigger the resource reselection assistance; and/or, the receiving unit is further configured to receive resources Reselection enabling information, the resource reselection enabling information is used to enable the resource reselection assistance.
  • the processing unit 1402 is specifically configured to: determine that the second resource and the third resource overlap, and the priority of the third resource is higher than the priority of the second resource; wherein, The third resource is a transmission resource reserved by the second terminal.
  • the indication information is a first sequence and a second sequence; wherein the first sequence is used to carry the acknowledgment response ACK corresponding to the first resource, and the second sequence is used to carry all the The negative acknowledgement response NACK corresponding to the first resource; or, the indication information is a third sequence, and the third sequence is different from the first sequence and the second sequence.
  • the indication information is a first sequence and a second sequence; the sending unit 1403 is specifically configured to: send the first sequence and the second sequence on the feedback resources in the first feedback resource set ; wherein, the first feedback resource set includes feedback resources corresponding to the first resources in the resources occupied by the physical sideline feedback control channel PSFCH.
  • the indication information is a third sequence; the sending unit 1403 is specifically configured to: send the third sequence on the first feedback resource in the first feedback resource set; wherein the first The feedback resource coincides with the frequency domain of the feedback resource for carrying the first sequence or the second sequence, and the phase of the third sequence is offset from the phase of the first sequence or the phase of the second sequence moving the first reference value; or sending the third sequence on the second feedback resource in the first feedback resource set; wherein the second feedback resource is the same as that used to carry the first sequence or the second feedback resource
  • the feedback resources of the sequence are adjacent in the first feedback resource set, and the phase of the third sequence is the same as the phase of the first sequence or the phase of the second sequence; wherein, the first feedback resource set Including the feedback resource corresponding to the first resource in the resources occupied by the physical sideline feedback control channel PSFCH.
  • the indication information is a third sequence
  • the sending unit 1403 is specifically configured to: send the third sequence on the feedback resources in the second feedback resource set; the index of the third sequence Satisfy: PID is the physical layer source address identifier carried in the control information, M ID is the identifier for receiving the first data, is the number of sequences that can be transmitted by feedback resources in the second feedback resource set; wherein, the second feedback resource set includes bits with a bit value of 0 in the bitmap corresponding to the resources occupied by the physical sideline feedback control channel PSFCH corresponding feedback resources.
  • the present application also provides a communication device 1500.
  • the communication device 1500 may be a terminal, a component or component with terminal functions, or a chip (such as a baseband chip) applied in a terminal.
  • the functions or modules may be implemented by software, or by hardware, or by executing corresponding software by hardware, or by a combination of software and hardware.
  • the communication device may also be other communication modules, which are used to implement the methods in the method embodiments of the present application.
  • the structure of the communication device 1500 is shown in FIG. 15 , including a sending unit 1501 , a receiving unit 1502 and a processing unit 1503 .
  • the sending unit 1501 may be a transmitter
  • the receiving unit 1502 may be a receiver
  • the transmitter may include an antenna and a radio frequency circuit, etc.
  • the receiver may also include an antenna and a radio frequency circuit, etc.
  • the transmitter and the receiver may belong to one Functional modules, such as transceivers, or transmitters and receivers can also be functional modules independent of each other
  • the processing unit 1503 can be a processor, such as a baseband processor, and the baseband processor can include one or more central processing units (central processing unit, CPU).
  • the sending unit 1501 and the receiving unit 1502 may be radio frequency units
  • the processing unit 1503 may be a processor, such as a baseband processor.
  • the sending unit 1501 and the receiving unit 1502 may be input and output interfaces of a chip (such as a baseband chip) (for example, the sending unit 1501 is an output interface, the receiving unit 1502 is an input interface, or the input and output are the same interface, then Both the sending unit 1501 and the receiving unit 1502 are the interface), and the processing unit 1503 may be a processor of a chip system, and may include one or more central processing units. It should be understood that the processing unit 1503 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component, the sending unit 1501 may be implemented by a transmitter or a transmitter-related circuit component, and the receiving unit 1502 may be implemented by a receiver or a receiver-related circuit component circuit component implementation.
  • a chip such as a baseband chip
  • the communication apparatus 1500 can be applied to the first terminal shown in FIG. 11 , and can implement the method for resource reselection provided by the foregoing embodiments.
  • the function of each unit of the communication device 1500 will be introduced below.
  • the sending unit 1501 is configured to send control information to a third terminal, where the control information indicates a first resource and a second resource, the first resource carries the first data corresponding to the control information, and the second resource sending resources reserved for the first terminal;
  • the receiving unit 1502 is configured to receive the first indication information sent by the third terminal;
  • the processing unit 1503 is configured to perform resource reselection on the second resource.
  • control information further includes resource reselection trigger information, where the resource reselection trigger information is used to trigger the third terminal to perform resource reselection assistance.
  • the receiving unit is specifically configured to: receive the first sequence and the second sequence sent by the third terminal; wherein the first sequence is used to transmit an acknowledgement response corresponding to the first resource ACK, the second sequence is used to transmit the negative acknowledgement response NACK corresponding to the first resource; or receive the third sequence sent by the third terminal; the third sequence is the same as the first sequence and the third sequence. The two sequences are different.
  • the present application also provides a communication device 1600.
  • the communication device 1600 may be a terminal, a component or component with terminal functions, or a chip (such as a baseband chip) applied in a terminal.
  • the functions or modules may be implemented by software, or by hardware, or by executing corresponding software by hardware, or by a combination of software and hardware.
  • the communication device may also be other communication modules, which are used to implement the methods in the method embodiments of the present application.
  • the structure of the communication device is shown in FIG. 16 , including a sending unit 1601 , a processing unit 1602 and a receiving unit 1603 .
  • the sending unit 1601 may be a transmitter
  • the receiving unit 1603 may be a receiver
  • the transmitter may include an antenna and a radio frequency circuit, etc.
  • the receiver may also include an antenna and a radio frequency circuit, etc.
  • the transmitter and the receiver may belong to one Functional modules, such as transceivers, or transmitters and receivers can also be functional modules independent of each other
  • the processing unit 1602 can be a processor, such as a baseband processor, and the baseband processor can include one or more central processing units (central processing unit, CPU).
  • the sending unit 1601 and the receiving unit 1603 may be radio frequency units
  • the processing unit 1602 may be a processor, such as a baseband processor.
  • the sending unit 1601 and the receiving unit 1603 may be input and output interfaces of a chip (such as a baseband chip) (for example, the sending unit 1601 is an output interface, the receiving unit 1603 is an input interface, or the input and output are the same interface, then Both the sending unit 1601 and the receiving unit 1603 are the interface), and the processing unit 1602 may be a processor of a chip system, and may include one or more central processing units.
  • the processing unit 1602 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component
  • the sending unit 1601 may be implemented by a transmitter or a transmitter-related circuit component
  • the receiving unit 1603 may be implemented by a receiver or a receiver-related circuit component circuit component implementation.
  • the communication apparatus 1600 can be applied to the first terminal shown in FIG. 12 , and can implement the method for resource reselection provided by the foregoing embodiments.
  • the function of each unit of the communication device 1600 will be introduced below.
  • the sending unit 1601 is configured to send control information to a third terminal, where the control information indicates a first resource and a second resource, the first resource carries the first data corresponding to the control information, and the second resource sending resources reserved for the first terminal;
  • the processing unit 1602 is configured to determine that the number of times the negative acknowledgement response NACK corresponding to the first resource is received by the receiving unit 1603 is greater than a preset threshold; and perform resource reselection on the second resource.
  • the present application also provides a communication device 1700, the structure of which is shown in FIG. 17, the communication device 1700 can be applied to the third terminal shown in FIG. 11, and the above implementation can be realized
  • the communication apparatus 1700 includes: a communication module 1701 , a processor 1702 and a memory 1703 . Wherein, the communication module 1701, the processor 1702 and the memory 1703 are connected to each other.
  • the communication module 1701, the processor 1702 and the memory 1703 are coupled and connected to each other.
  • the communication module 1701 is used for receiving and sending data to realize communication interaction with other devices.
  • the communication module 1701 may be implemented through a physical interface, a communication module, a communication interface, and an input/output interface.
  • the processor 1702 is configured to receive control information from the first terminal through the communication module 1701, where the control information indicates a first resource and a second resource, and the first resource carries the first resource corresponding to the control information.
  • the second resource is the sending resource reserved by the first terminal; determine that the second resource satisfies the reselection condition; send indication information to the first terminal through the communication module 1701, the indication information It is used to instruct reselection of the second resource.
  • control information includes resource reselection trigger information, wherein the resource reselection trigger information is used to trigger the resource reselection assistance; and/or,
  • the processor 1702 is further configured to receive, through the communication module 1701, resource reselection enabling information, where the resource reselection enabling information is used to enable the resource reselection assistance.
  • the processor 1702 is specifically configured to: determine that the second resource and the third resource overlap, and the priority of the third resource is higher than the priority of the second resource; wherein, The third resource is a transmission resource reserved by the second terminal.
  • the indication information is a first sequence and a second sequence; wherein the first sequence is used to carry the acknowledgment response ACK corresponding to the first resource, and the second sequence is used to carry all the The negative acknowledgement response NACK corresponding to the first resource; or, the indication information is a third sequence, and the third sequence is different from the first sequence and the second sequence.
  • the indication information is a first sequence and a second sequence; the processor 1702 is specifically configured to: send the first sequence on feedback resources in the first feedback resource set through the communication module 1701 A sequence and a second sequence; wherein the first feedback resource set includes feedback resources corresponding to the first resources in the resources occupied by the physical sideline feedback control channel PSFCH.
  • the indication information is a third sequence
  • the processor 1702 is specifically configured to: send the third sequence on the first feedback resource in the first feedback resource set through the communication module 1701 ; wherein the first feedback resource coincides with the frequency domain of the feedback resource used to carry the first sequence or the second sequence, and the phase of the third sequence is relative to the phase of the first sequence or the the second sequence is phase-shifted by the first reference value; or
  • the third sequence is sent on the second feedback resource in the first feedback resource set by the communication module 1701; wherein the second feedback resource is the same as that used to carry the first sequence or the second sequence
  • the feedback resources of are adjacent in the first feedback resource set, and the phase of the third sequence is the same as the phase of the first sequence or the phase of the second sequence;
  • the first feedback resource set includes feedback resources corresponding to the first resources among the resources occupied by the physical sideline feedback control channel PSFCH.
  • the indication information is a third sequence
  • the processor 1702 is specifically configured to: send the third sequence on the feedback resources in the second feedback resource set through the communication module 1701;
  • the index of the third sequence satisfies: PID is the physical layer source address identifier carried in the control information, M ID is the identifier for receiving the first data, is the number of sequences that can be transmitted by feedback resources in the second feedback resource set;
  • the second feedback resource set includes feedback resources corresponding to the bits whose bit value is 0 in the bitmap corresponding to the resources occupied by the physical sideline feedback control channel PSFCH.
  • the memory 1703 is used to store program instructions and data.
  • the program instructions may include program code, and the program code includes computer operation instructions.
  • the memory 1703 may include random access memory (RAM), and may also include non-volatile memory (non-volatile memory), such as at least one disk storage.
  • the processor 1702 executes the program instructions stored in the memory 1703 and uses the data stored in the memory 1703 to implement the above functions, thereby implementing the resource reselection assistance method provided by the above embodiments.
  • the memory 1703 in FIG. 17 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 a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). 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 Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the present application also provides a communication device 1800.
  • the structure of the communication device is shown in FIG. 18.
  • the communication device 1800 can be applied to the first terminal shown in FIG. 11, and the above implementation can be realized.
  • the communication apparatus 1800 includes: a communication module 1801 , a processor 1802 and a memory 1803 .
  • the communication module 1801, the processor 1802 and the memory 1803 are connected to each other.
  • the communication module 1801, the processor 1802 and the memory 1803 are coupled and connected to each other.
  • the communication module 1801 is used for receiving and sending data to realize communication interaction with other devices.
  • the communication module 1801 may be implemented through a physical interface, a communication module, a communication interface, and an input/output interface.
  • the processor 1802 is configured to send control information to a third terminal through the communication module 1801, where the control information indicates a first resource and a second resource, and the first resource carries the first data corresponding to the control information,
  • the second resource is a transmission resource reserved by the first terminal; and after receiving the first indication information sent by the third terminal through the communication module 1801, resource reselection is performed on the second resource.
  • control information further includes resource reselection trigger information, where the resource reselection trigger information is used to trigger the third terminal to perform resource reselection assistance.
  • the processor 1802 is specifically configured to: receive the first sequence and the second sequence sent by the third terminal through the communication module 1801; wherein the first sequence is used to transmit the first sequence A positive acknowledgment response ACK corresponding to a resource, and the second sequence is used to transmit a negative acknowledgment response NACK corresponding to the first resource; or
  • the third sequence sent by the third terminal is received by the communication module 1801; the third sequence is different from the first sequence and the second sequence.
  • the memory 1803 is used to store program instructions and data.
  • the program instructions may include program code, and the program code includes computer operation instructions.
  • the memory 1803 may include random access memory (RAM), and may also include non-volatile memory (non-volatile memory), such as at least one disk storage.
  • the processor 1802 executes the program instructions stored in the memory 1803 and uses the data stored in the memory 1803 to implement the above functions, thereby implementing the resource reselection method provided by the above embodiments.
  • the memory 1803 in FIG. 18 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 a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). 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 Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the present application also provides a communication device 1900.
  • the structure of the communication device is shown in FIG. 19.
  • the communication device 1900 can be applied to the first terminal shown in FIG. 12, and the above implementation can be realized.
  • the communication apparatus 1900 includes: a communication module 1901 , a processor 1902 and a memory 1903 . Wherein, the communication module 1901, the processor 1902 and the memory 1903 are connected to each other.
  • the communication module 1901, the processor 1902 and the memory 1903 are coupled or connected to each other.
  • the communication module 1901 is used for receiving and sending data to realize communication interaction with other devices.
  • the communication module 1901 may be implemented through a physical interface, a communication module, a communication interface, and an input/output interface.
  • the processor 1902 is configured to send control information to a third terminal through the communication module 1901, where the control information indicates a first resource and a second resource, and the first resource carries the first data corresponding to the control information,
  • the second resource is a transmission resource reserved by the first terminal; when it is determined that the number of times of receiving a negative acknowledgement response NACK corresponding to the first resource is greater than a preset threshold, resource reselection is performed on the second resource.
  • the memory 1903 is used to store program instructions and data.
  • the program instructions may include program code, and the program code includes computer operation instructions.
  • the memory 1903 may include random access memory (RAM), and may also include non-volatile memory (non-volatile memory), such as at least one disk storage.
  • the processor 1902 executes the program instructions stored in the memory 1903 and uses the data stored in the memory 1903 to implement the above functions, thereby implementing the resource reselection method provided by the above embodiments.
  • the memory 1903 in FIG. 19 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 a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). 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 Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the embodiments of the present application further provide a computer program, which, when the computer program runs on a computer, enables the computer to execute the resource reselection assistance or resource reselection method provided by the above embodiments.
  • the embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a computer, the computer executes the resources provided by the above embodiments.
  • the storage medium may be any available medium that the computer can access.
  • computer readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or be capable of carrying or storing instructions or data structures in the form of desired program code and any other medium that can be accessed by a computer.
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

Abstract

本申请提供资源重选辅助的方法与装置和资源重选的方法与装置，可以应用于D2D或车联网V2X等，或可以用于智能驾驶，智能网联车等领域。在该方案中，第三终端接收来自第一终端的控制信息，所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；第三终端确定所述第二资源满足重选条件，向所述第一终端发送指示信息，所述指示信息用于指示重选所述第二资源。第三终端能够在确定第二资源存在资源冲突时，及时指示第一终端重新选择第二资源，防止第一终端继续使用第二资源发送数据，进而解决资源冲突问题，提高了资源选择的效率。

Description

资源重选辅助的方法与装置和资源重选的方法与装置 技术领域
本申请涉及通信技术领域，尤其涉及一种资源重选辅助的方法与装置和一种资源重选的方法与装置。
背景技术
随着通信技术的发展，自第三代合作伙伴计划(3 rd Generation Partnership Project，3GPP)版本(release)12开始，第四代(4 th generation，4G)通信系统(即长期演进(Long Term Evolution，LTE)通信系统)和第五代(5 th generation，5G)通信系统均可以支持设备和设备(Device to Device，D2D)之间的通信。这种通信方式称为侧行链路(sidelink)通信，两个设备之间建立的连接为侧行链路。以下简称支持sidelink通信的设备为sidelink设备。
由于两个sidelink设备之间可以直接发送数据，无需在经过基站、核心网等，因此可以大大减少数据传输时延。sidelink通信的一种应用场景为车到任何物体(vehicle to everything，V2X)，V2X主要用于实现车与车(vehicle to vehicle，V2V)、路侧基础设施(infrastructure)、行人(pedestrian)、网络(network)等之间的通信。
sidelink通信支持混合自动重传请求(Hybrid Automatic Repeat Request，HARQ)，即发送端在PSSCH传输sidelink数据后，接收端可以根据在PSSCH信道接收的信号的译码结果，通过PSFCH反馈该sidelink数据对应的响应消息(例如ACK/NACK)。
其中，发送端在PSSCH传输sidelink数据之前，需要向接收端发送资源预约信息，发送端在资源侦听窗口内对频域资源池中其它发送端发送的侧行链路控制信息(Sidelink Control Information，SCI)进行侦听，将其它发送端已预约且参考信号接收功率大于预设门限的资源从候选资源池中删除后，再选择可用资源进行资源预约。但当两个发送端距离较远，互相侦听不到对方发送的SCI时，可能导致两个发送端向接收端预约的资源重叠，造成资源冲突。当两个发送端发送sidelink数据的发送资源冲突时，接收端仅会通过PSFCH反馈该sidelink数据对应的响应消息，发送端无法获知资源冲突问题，而继续在该预约的资源上重新发送sidelink数据，进而无法解决资源冲突问题。
发明内容
本申请提供一种资源重选辅助的方法与装置和一种资源重选的方法与装置，可以应用于D2D或车联网V2X等，或可以用于智能驾驶，智能网联车等领域。
第一方面，本申请实施例提供一种资源重选辅助的方法，该方法的执行主体可以是终端，也可以是具备终端功能的组合器件或部件，也可以是应用于终端中的通信芯片(例如处理器、基带芯片、或芯片系统等)。该方法包括：接收来自第一终端的控制信息，所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；确定所述第二资源满足重选条件，向所述第一终端发送指示信息，所述指示信息用于指示重选所述第二资源。
通过该方法，执行该方法的装置在接收到第一终端的控制信息后，确定控制信息指示 的第二资源满足重选条件，能够确定第一终端预留的第二资源是否存在资源冲突。确定第二资源满足重选条件后，向第一终端发送指示信息，该指示信息用于指示重选第二资源，从而能够在确定第二资源存在资源冲突时，及时指示第一终端重新选择第二资源，防止第一终端继续使用第二资源发送数据，进而解决资源冲突问题，提高了资源选择的效率。
在一种可能的设计中，所述控制信息中包含资源重选触发信息，其中所述资源重选触发信息用于触发所述资源重选辅助；和/或，所述方法还包括：接收资源重选使能信息，所述资源重选使能信息用于使能所述资源重选辅助。
通过以上设计，执行该方法的装置可以根据多种方式判断是否进行资源重选辅助，具体可以为在接收到第一终端通过控制信息发送的资源重选触发信息时，触发本申请实施例提供的资源重选辅助方法，和/或，接收到资源重选使能信息时，确定控制信息指示的资源所在的资源池使能资源重选，则进行资源重选辅助。
在一种可能的设计中，所述确定所述第二资源满足重选条件，包括：确定所述第二资源和第三资源重合，且所述第三资源的优先级高于所述第二资源的优先级；或者确定所述第二资源和第三资源重合，且确定第一资源的译码失败次数大于等于第一预设阈值；或者确定所述第二资源和第三资源重合，并确定第三资源的优先级高于第二资源的优先级，且第三资源的优先级高于预设的优先级阈值；或者确定所述第二资源和第三资源重合，并确定第四资源上的信号功率测量值大于第一资源上的信号功率测量值；或者确定所述第二资源和第三资源重合，并确定第四资源上的信号功率测量值大于预设阈值，所述信号功率测量值可以是RSRP测量结果；其中，第三资源为第二终端预留的发送资源，所述第四资源承载第二终端发送的第二控制信息对应的第二数据。
通过以上设计，执行该方法的装置能够及时判断多个终端预留的发送资源是否存在资源冲突，避免多个终端使用重合的发送资源发送数据。
在一种可能的设计中，所述指示信息为第一序列和第二序列；其中所述第一序列用于承载所述第一资源对应的肯定应答响应ACK，所述第二序列用于承载所述第一资源对应的否定应答响应NACK；或者，所述指示信息为第三序列，所述第三序列与所述第一序列和所述第二序列不同。
通过以上设计，本申请实施例提供多种形式的指示信息，具体的，指示信息可以为用于承载第一资源对应的ACK的第一序列和用于承载第一资源对应的NACK的第二序列，或指示信息可以为第三序列；从而能够在不同业务场景中灵活使用不同形式的指示信息，提高资源重选辅助方法的灵活性。
在一种可能的设计中，所述指示信息为第一序列和第二序列；所述向所述第一终端发送指示信息，包括：在第一反馈资源集合中的反馈资源上发送所述第一序列和第二序列；其中，所述第一反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源中第一资源对应的反馈资源。
通过以上设计，在不改变发送第一序列和第二序列的反馈资源的基础上，执行该方法的装置通过同时在第一反馈资源集合中的反源馈资上发送第一序列和第二序列，指示第一终端重选第二资源。
在一种可能的设计中，所述指示信息为第三序列；所述向所述第一终端发送指示信息，包括：在第一反馈资源集合中的第一反馈资源上发送所述第三序列；其中所述第一反馈资源与用于承载所述第一序列或所述第二序列的反馈资源的频域重合，且所述第三序列的相 位相对于所述第一序列的相位或所述第二序列相位偏移第一参考值；或者在所述第一反馈资源集合中的第二反馈资源上发送所述第三序列；其中所述第二反馈资源与用于承载所述第一序列或所述第二序列的反馈资源在所述第一反馈资源集合中相邻，所述第三序列的相位与所述第一序列的相位或所述第二序列的相位相同；其中，所述第一反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源中第一资源对应的反馈资源。
在一种可能的设计中，所述指示信息为第三序列，所述向所述第一终端发送指示信息，包括：
在第二反馈资源集合中的反馈资源上发送所述第三序列；所述第三序列的索引满足：
Figure PCTCN2020121690-appb-000001
P ID为所述控制信息中承载的物理层源地址标识，M ID为所述指示信息的标识，
Figure PCTCN2020121690-appb-000002
为所述第二反馈资源集合中反馈资源可传输的序列数量；其中，所述第二反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源对应的比特位图中比特值为0的比特位对应的反馈资源。
通过以上设计，在指示信息为第三序列时，提供多种发送第三序列的方式，执行该方法的装置可以根据不同的业务场景选择不同的方式发送第三序列，提高资源重选辅助方法的灵活性。
第二方面，本申请实施例还提供一种资源重选的方法，该方法的执行主体可以是终端，也可以是具备终端功能的组合器件或部件，也可以是应用于终端中的通信芯片(例如处理器、基带芯片、或芯片系统等)。该方法包括：向第三终端发送控制信息，所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；接收所述第三终端发送的第一指示信息；对所述第二资源进行资源重选。
通过该方法，执行该方法的装置接收到第三终端发送的指示信息时，确定第二资源满足重选条件，并对第二资源进行资源重选，从而防止通过第二资源发送数据而导致资源冲突，进而提高发送数据的准确性和效率。
在一种可能的设计中，所述控制信息还包括资源重选触发信息，所述资源重选触发信息用于触发所述第三终端进行资源重选辅助。
通过以上设计，执行该方法的装置发送的控制信息还可以包括资源重选触发信息，用于触发第三终端进行资源重选辅助，从而通知第三终端对控制信息指示的第二资源判断是否满足重选条件，以辅助执行该方法的装置进行资源重选。
在一种可能的设计中，所述接收第三终端发送的指示信息，包括：接收所述第三终端发送的第一序列和第二序列；其中所述第一序列用于传输所述第一资源对应的肯定应答响应ACK，所述第二序列用于传输所述第一资源对应的否定应答响应NACK；或者接收所述第三终端发送的第三序列；所述第三序列与所述第一序列和所述第二序列不同。
通过以上设计，本申请实施例提供多种形式的指示信息，具体的，指示信息可以为用于承载第一资源对应的ACK的第一序列和用于承载第一资源对应的NACK的第二序列，或指示信息可以为第三序列；使得执行该方法的装置能够在不同业务场景中灵活接收不同形式的指示信息。
第三方面，本申请实施例还提供一种资源重选的方法，该方法的执行主体可以是终端，也可以是具备终端功能的组合器件或部件，也可以是应用于终端中的通信芯片(例如处理器、基带芯片、或芯片系统等)。该方法包括：向第三终端发送控制信息，所述控制信息 指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；确定接收所述第一资源对应的否定应答响应NACK的次数大于预设阈值；对所述第二资源进行资源重选。
通过该方法，执行该方法的装置在接收第一资源对应的NACK次数大于预设阈值时，确定第二资源存在资源冲突，对第二资源进行资源重选。执行该方法的装置通过接收的第一资源对应的NACK次数判断是否进行资源重选，从而防止资源冲突导致第三终端对第一资源译码失败时，执行该方法的装置仍使用第二资源发送数据。
第四方面，本申请实施例还提供一种通信装置，该通信装置具有实现上述第一方面的方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述通信装置的结构中包括接收单元、处理单元和发送单元，这些单元可以执行上述第一方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第五方面，本申请实施例还提供一种通信装置，该通信装置具有实现上述第二方面的方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述通信装置的结构中包括接收单元、处理单元和发送单元，这些单元可以执行上述第二方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第六方面，本申请实施例还提供一种通信装置，该通信装置具有实现上述第三方面的方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述通信装置的结构中包括处理单元和发送单元，这些单元可以执行上述第三方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
上述方面中的通信装置可以是终端，也可以是应用于终端中的芯片或者其他可实现上述终端功能的组合器件、部件等。当通信装置是终端时，收发模块可以是发送器和接收器，或整合的收发器，可以包括天线和射频电路等，处理模块可以是处理器，例如基带芯片等。当通信装置是具有上述终端功能的部件时，收发模块可以是射频单元，处理模块可以是处理器。当通信装置是应用于终端中的芯片系统时，收发模块可以是芯片系统的输入输出接口，处理模块可以是芯片系统中的处理器，例如：中央处理单元(central processing unit，CPU)。
第七方面，本申请实施例还提供了一种通信装置，所述通信装置的结构中包括通信模块、处理器和存储器，所述处理器被配置为支持所述通信装置执行上述第一方面提供的方法中相应的功能。所述存储器与所述处理器耦合，其保存必要的程序指令和数据。所述通信模块用于与其他设备进行通信。
第八方面，本申请实施例还提供了一种通信装置，所述通信装置的结构中包括通信模块、处理器和存储器，所述处理器被配置为支持所述通信装置执行上述第二方面或第三方面提供的方法中相应的功能。所述存储器与所述处理器耦合，其保存必要的程序指令和数据。所述通信模块用于与其他设备进行通信。
第九方面，本申请还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面至第三方面提供的方法中的全部或部分步骤。
第十方面，本申请还提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面至第三方面提供的方法中的全部或部分步骤。
附图说明
图1为本申请实施例提供的一种网络架构示意图；
图2为本申请实施例提供的一种DRX循环示意图；
图3为本申请实施例提供的一种网络设备调度模式示意图；
图4为本申请实施例提供的一种发送端进行资源侦听的示意图；
图5为本申请实施例提供的一种网络设备指示PSSCH时域资源的比特位图示意图；
图6为本申请实施例提供的一种网络设备指示PSSCH频域资源的示意图；
图7为本申请实施例提供的一种PSFCH占用时隙示意图；
图8为本申请实施例提供的一种PSFCH频域资源的比特位图示意图；
图9为本申请实施例提供的一种PSSCH时隙与PSFCH时隙的时间间隔示意图；
图10为本申请实施例提供的一种PSSCH资源与对应的PSFCH示意图；
图11为本申请实施例提供的一种资源重选辅助方法的流程图；
图12为本申请实施例提供的一种资源重选的方法流程图；
图13为本申请实施例提供的一种终端在一个发送周期内预约多次PSSCH资源的示意图；
图14为本申请实施例提供的一种通信装置1400的结构示意图；
图15为本申请实施例提供的一种通信装置1500的结构示意图；
图16为本申请实施例提供的一种通信装置1600的结构示意图；
图17为本申请实施例提供的一种通信装置1700的结构示意图；
图18为本申请实施例提供的一种通信装置1800的结构示意图；
图19为本申请实施例提供的一种通信装置1900的结构示意图。
具体实施方式
为了方便理解本申请实施例，下面介绍与本申请实施例相关的术语：
1)终端设备，包括向用户提供语音和/或数据连通性的设备，例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音和/或数据。该终端设备可以包括用户设备(user equipment，UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device，D2D)终端设备、车连接一切(vehicle-to-everything，V2X)终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端设备、物联网(internet of things，IoT)终端设备、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、远程站(remote station)、接入点(access point，AP)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如，可以包括移动电话(或称为“蜂窝”电话)，具有移动终端设备的计算机，便携式、袖珍式、手持式、计算机内置的移动装置等。例如，个人通信业务(personal communication service， PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、等设备。还包括受限设备，例如功耗较低的设备，或存储能力有限的设备，或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification，RFID)、传感器、全球定位系统(global positioning system，GPS)、激光扫描器等信息传感设备。
需要说明的是，如上介绍的各种终端设备，如果位于车辆上(例如放置在车辆内或安装在车辆内)，都可以认为是V2X设备。
为了方便说明，在本申请后续描述以及各图中，可以将终端设备简称为终端或UE。
2)侧行链路(SideLink，SL)，可以应用于D2D通信与V2X通信场景。Sidelink通信均是基于PC5接口的通信，二者使用的资源可以统称为sidelink资源。
3)V2X，在版本(Rel)-14/15/16版本中，V2X作为设备到设备(device-to-device，D2D)技术的一个主要应用顺利立项。V2X将在已有的D2D技术的基础上对V2X的具体应用需求进行优化，需要进一步减少终端的接入时延，解决资源冲突问题。
V2X具体又包括车与车(vehicle-to-vehicle，V2V)、车与路侧基础设施(vehicle-to-infrastructure，V2I)、车与行人(vehicle-to-pedestrian，V2P)的直接通信，以及车与网络(vehicle-to-network，V2N)的通信交互等几种应用需求。V2V指的是车辆间的通信；V2P指的是车辆与人(包括行人、骑自行车的人、司机、或乘客)的通信；V2I指的是车辆与网络设备的通信，网络设备例如路侧单元(road side unit，RSU)，另外还有一种V2N可以包括在V2I中，V2N指的是车辆与基站/网络的通信。
4)“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
需要说明的是，本申请中所涉及的多个，是指两个或两个以上。至少一个，是指一个或一个以上。
另外，需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
本申请实施例提供的技术方案可以应用于SL通信场景，例如D2D场景(可以是NR D2D场景也可以是LTE D2D场景等)，或者例如V2X场景(可以是NR V2X场景也可以是LTE V2X场景等)，还可以应用于其他的场景或其他的通信系统，具体的不做限制。
下面介绍本申请实施例所应用的网络架构。请参考图1，为本申请实施例所应用的一种网络架构。
图1中所示的网络架构中包括网络设备和多个终端(如图1所示的终端1和终端2)。下面以终端1和终端2为例进行说明。
这两个终端均可以在网络设备覆盖下，或者这两个终端可以只有终端1在网络设备覆盖下，终端2不在网络设备覆盖下，或者这两个终端也可以在不同的网络设备覆盖下。这两个终端之间可以通过SL进行通信。图1以这两个终端均在图1中所示的一个网络设备的覆盖下为例。其中，这两个终端都是V2X设备。当然图1中的终端的数量只是举例，在实际应用中，网络设备可以为多个终端提供服务。其中，网络设备可以为基站。
由于数据包的产生并不是连续的，终端在没有数据传输时可以通过关闭终端的接收电路来降低功耗，从来提升移动电池的使用时间。基于此，引入不连续接收(Discontinuous  Reception，DRX)技术用于省电。一个DRX循环定义了激活时间(Active Time)，如图2所示，Active Time包括DRX开启时间段(DRX On Duration)和有可能进入DRX的时间段(opportunity for DRX)，其中，DRX On Duration为需要终端监听并接收物理下行控制信道(Physical Downlink Control Channel，PDCCH)发送数据的时间段，opportunity for DRX为有可能进入DRX的时间段，可以由网络设备进行配置。
网络设备通过下行同步信号及系统配置完成与终端的下行同步过程，终端通过上行同步接入网络设备完成与基站的上行同步过程。在终端有节能需求时，向网络设备上报节能请求，网络设备响应该节能请求为终端配置DRX周期等相关参数，完成对终端的DRX配置。
在NR系统下，SL连接主要由物理侧行控制信道(Physical Sidelink Control Channel，PSCCH，)、物理侧行共享信道(Physical Sidelink Shared Channel，PSSCH)、物理侧行广播信道(Physical Sidelink Broadcast Channel，PSBCH)和物理侧行反馈控制信道(Physical Sidelink Feedback control Channel，PSFCH)组成。其中，PSCCH用于传输控制信息(Sidelink Control information，SCI)，PSSCH信道用于传输数据；PSBCH承载来自RRC层的MIB-V2X；PSFCH用于承载SL上接收端向发送端发送的反馈信息，具体可以是发送确认字符(Acknowledge character，ACK)或否认字符(Negative Acknowledge character，NACK)的ACK/NACK形式，或者仅发送NACK的NACK-only形式。
进一步地，PSFCH反馈ACK/NACK的方式可用于单播和多播场景中。其中，单播场景为一个发送端和一个接收端组成一个单播连接对，接收端接收到一个来自发送端发送的控制信息后，根据控制信息中的HARQ使能指示信息，确定需要向发送端终端反馈ACK/NACK；若接收端确定能够正确译码接收到的PSSCH，则向发送端发送携带ACK信息的PSFCH序列；否则，反馈携带NACK信息的PSFCH序列。
组播场景可分为组播1场景(NACK-only)和组播2场景(NACK/ACK)。其中，组播1场景下，若组内终端能够正确译码PSCCH，但是PSCCH对应的PSSCH译码失败，则反馈携带NACK信息的PSFCH序列，否则不反馈任何信息。在组播2场景下，若组内终端能够正确译码PSCCH，根据控制信息中的HARQ使能信息，若PSCCH对应的PSSCH译码失败，则反馈携带NACK信息的PSFCH序列，否则，反馈携带ACK信息的PSFCH序列。
终端在进行SL通信时，需要确定PSSCH的传输资源，具体的，终端在PSCCH上发送第一级控制信息，在PSSCH上发送第二级控制信息和第一数据；第一级控制信息中携带PSCCH对应的PSSCH的频域资源信息，用以指示PSSCH频域资源的大小。PSCCH和其对应的PSSCH时域上在同一个时隙上发送，频域上资源起始位置相同，从而在接收端终端盲检测到该PSCCH后，根据PSCCH的时频域起始位置以及第一级控制信息中的PSSCH的频域资源信息，即可对PSSCH进行译码。具体实施中，以网络设备为基站为例，主要通过基站调度模式和自主选择模式这两种通信模式确定PSSCH的传输资源。
基站调度模式用于基站覆盖范围内的SL通信，终端根据基站的调度信息，将被调度的时频资源作为PSSCH的传输资源，并在该资源上发送控制信息和数据。如图3所示，以基站调度模式中的动态调度为例，对基站调度模式进行介绍：基站根据终端的缓存状态上报(Buffer Status Report,BSR)情况，集中进行资源分配。具体地，基站会通过下行控制信息(Downlink Control Information，DCI)告知发送端侧行数据的时频资源，发送端接 收该DCI后在前述DCI指示的资源上向接收端发送控制信息(Sidelink Control Information，SCI)和数据。在基站调度模式下，各个终端的侧行传输资源由基站统一进行调度，能够避免碰撞。
自主选择模式下，终端在SL通信资源池包含的可用时频资源中自行选择PSSCH的时频资源，并在选择的资源上发送控制信息和数据。该模式下，终端基于自身侦听的结果进行资源选择，而不再依赖于基站的调度。由于自主选择模式不受限于网络覆盖，在没有网络覆盖情况下，发送端也可以用该模式进行通信。下面对终端在自主选择模式下进行资源侦听的具体方式进行介绍：
如图4所示，发送端在时隙n触发资源选择，资源侦听窗口可定义为资源选择触发之前的T个时隙。资源选择窗口为资源选择触发之后的[n+T1,n+T2]对应的时隙。发送端在资源侦听窗口内对频域资源池内其他终端发送的SCI进行侦听。若侦听的SCI包括其他终端已经预约的资源，且该预约资源位于资源选择窗口[n+T1,n+T2]内，则发送端对该预约资源对应的候选资源进行PSSCH参考信号接收功率(Reference Signal Received Power,RSRP)的测量，如果测量的结果高于预先设定的RSRP门限Th RSRP，则从资源选择窗口中排除该候选资源。其中Th RSRP为根据接收到的SCI中所指示的数据对应的优先级和发送端的待发送数据对应的优先级确定的。发送端在从资源选择窗口中排除测量结果高于预先设定的Th RSRP后，从剩余的候选资源集合中选择传输资源。例如，发送端在如图4所示的资源侦听窗口中，在资源1，资源2和资源3上侦听到了其他终端发送的SCI并且其PSSCH-RSRP超过了Th RSRP。则发送端在资源选择中将这些资源排除，并在如图4所示的资源选择窗口中除资源1,2,3之外的资源中选择资源进行侧行传输。发送端基于侦听结果选择传输资源，并在所述选择的资源上向接收端发送控制信息和数据。
进一步地，在SL通信中，终端进行时频资源选择是基于SL通信资源池来进行配置的。SL通信资源池是用于SL通信的时域资源和频域资源的集合。对于时域资源，网络设备通过周期性重复的比特位图来指示可用于SL通信的子帧的集合。例如，如图5所示，假设一个周期的比特位图的长度为8比特，每个子帧中SL传输占用固定的M个正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号，则定义M为一个SL传输时长，也可以称M为时域传输单元。
对于频域资源，网络设备将用于SL通信的频段分为若干个子信道，每个子信道包含一定数量的物理资源块(Physical Resource Block，PRB)。
如图6所示，网络设备指示用于SL通信的频率资源的第一个PRB的序号、通信资源池中包含的总的子信道数量N以及每个子信道包含的PRB数量n CH。需要说明的是，SL通信的一次传输可以占用一个或多个子信道。
SL通信中还支持物理层HARQ-ACK反馈，并通过PSFCH发送HARQ反馈信息。即针对一次PSSCH传输，若发送端在控制信息中携带HARQ-ACK反馈使能信息，接收端需要根据此次PSSCH译码结果反馈相应的ACK/NACK信息，其中ACK/NACK信息通过PSFCH信道传输。PSFCH信道资源是配置在资源池中的周期性资源，其周期配置参数
Figure PCTCN2020121690-appb-000003
可以是0、1、2、4。其中
Figure PCTCN2020121690-appb-000004
表示该资源池中无PSFCH资源配置，该资源中没有使能PSFCH发送，不支持物理层HARQ反馈；
Figure PCTCN2020121690-appb-000005
表示在一个时间窗内每隔
Figure PCTCN2020121690-appb-000006
个SL时隙会有一个PSFCH反馈时隙，例如，如图7所示，在PSFCH所在的时隙中，PSFCH占用最后一个保护间隔符号(GAP)前的最后两个OFDM符号。PSFCH 信道资源的频域可用带宽与资源池带宽相同。
由于自主选择模式中需要终端基于自身侦听结果自主选择PSSCH发送资源，为简化PSFCH资源的选择过程，为每个PSSCH子信道配置PSFCH反馈资源，具体每个PSSCH子信道对应的PSFCH资源确定方式为：
资源池配置了PSFCH频域资源的比特位图(bitmap)，用以指示资源池所在频域资源上的PRB是否可以用作PSFCH资源，即比特位图中包含的比特信息长度与资源池中的PRB个数相等，比特位图中比特值为1表示对应的PRB可以用作PSFCH传输，比特值为0表示对应的PRB资源不可以用作PSFCH传输。如图8所示，在一个有PSFCH传输资源的时隙中，假设一个子信道包含10个PRB，且资源池中共有3个子信道，则资源池中指示PSFCH频域资源的比特地图共包含3*10＝30个比特，分别指示每个PRB是否可以用作PSFCH传输。例如图8中所示，比特地图指示每个子信道的前4个PRB可以用作PSFCH反馈。
由于每N个PSSCH时隙对应一个PSFCH反馈时隙，对于包含N subch个子信道的资源池来说，每个子信道对应的PSFCH反馈资源数量为：
Figure PCTCN2020121690-appb-000007
其中，
Figure PCTCN2020121690-appb-000008
表示PSFCH频域资源中可以用于传输的PRB个数，即指示PSFCH频域资源的比特位图中值为1的比特个数总和。
考虑接收端译码能力限制，接收端不能在接收到PSSCH后立即进行反馈，因此定义一个PSSCH反馈的时间间隔K，即PSSCH在包含PSFCH资源的第一个可用的时隙上传输PSFCH，该时隙与PSSCH所在时隙至少间隔K个时隙，K的值为资源池配置的。如图9所示，当K＝2时，时隙0和1上承载的PSSCH可以在时隙3上的PSFCH资源上反馈，时隙2、3、4、5上承载的PSSCH在时隙7所在PSFCH资源上反馈，同时由于时隙2、3、4、5在一个时隙的PSFCH资源上反馈，可以将时隙2～5称为一个PSSCH绑定窗长。
一个PSFCH反馈时隙内的PSFCH可用资源按照PSSCH资源先时域后频域的方式，顺序分配给反馈周期内的每个PSSCH子信道。具体如图10所示，当
Figure PCTCN2020121690-appb-000009
且
Figure PCTCN2020121690-appb-000010
时，4个绑定的PSSCH时隙中每个PSSCH子信道对应的PSFCH资源如图10中编号所示，即为每个时隙的每个PSSCH子信道分配一个PRB的PSFCH反馈资源。用公式表示为，对于N个绑定的PSSCH时隙中的第i个时隙，若其资源池中频域子信道编号为j；那么其对应的PSFCH资源为：
Figure PCTCN2020121690-appb-000011
公式2表示为每个时隙的每个PSSCH子信道分配
Figure PCTCN2020121690-appb-000012
个连续的比特1对应的PRB资源，其中
Figure PCTCN2020121690-appb-000013
0≤j≤N subch-1，举例来说，参照图10，此时0≤i≤3，0≤j≤2，用户占用一个PSSCH子信道传输，如图10中编号为5的频域子信道，其对应i＝1，j＝1，根据公式2计算可知，其对应的PSFCH资源为图中编号为5的PRB。若用户占用PSSCH两个子信道传输，如图10中编号为5和9的PSSCH子信道，其中，编号为5的PSSCH子信道对应i＝1，j＝1，编号为9的PSSCH子信道为i＝1，j＝2，根据公式2计算可知，编号为5和9的PSSCH子信道对应的PSFCH资源分别图中编号为5和9的PRB，这两个PRB在频域物理资源上不连续。
PSFCH是基于低峰均比的ZC序列，具体的序列生成方式是根据序列长度生成一个基 础序列r(n),0≤n≤M ZC；其中，M ZC为序列长度。
对基础序列r(n)根据下列公式进行相位旋转，生成可复用的低均峰比序列：
r α(n)＝r*e jαn，0≤n≤M ZC            公式3
根据上述公式可知，多个终端可以采用不同的相位旋转值α生成可以区分的PSFCH序列，各个PSFCH序列码分复用在一个PRB上发送。例如，终端需要反馈ACK和NACK信息时，一个终端至少被分配两个序列，分别对应不同的相位旋转值α。
具体实施中，可以根据下列公式确定相位旋转值α：
Figure PCTCN2020121690-appb-000014
其中，
Figure PCTCN2020121690-appb-000015
表示一个RB中的子载波个数，NR系统中定义该数值为12；
Figure PCTCN2020121690-appb-000016
表示在一个无线帧中，当前子载波间隔μ对应的时隙号(slot number)；l表示PSFCH传输时隙上的OFDM符号编号，l＝0表示当前PSFCH传输资源上相对于第一个OFDM符号的符号索引。m 0表示用于传输ACK的PSFCH序列的相位，m cs表示用于传输NACK的PSFCH序列相对于用于传输ACK的PSFCH序列的相位偏移。NR-V2X支持单播和组播场景下的物理层PSFCH反馈，针对不同的业务类型，根据表1和表2确定m cs的取值。
HARQ-ACK值 0 1
序列循环移位 m cs＝0 m cs＝6
表1 单播和组播2场景下PSFCH序列的相位映射关系
HARQ-ACK值 0 1
序列循环移位 m cs＝0 N/A
表2 组播1场景下PUCCH format0有SR请求的HARQ信息反馈关系
具体实施中，若一个PSSCH占用
Figure PCTCN2020121690-appb-000017
个子信道，那么其对应
Figure PCTCN2020121690-appb-000018
Figure PCTCN2020121690-appb-000019
个PSFCH序列对，其中
Figure PCTCN2020121690-appb-000020
表示资源池配置的一个PRB的PSFCH资源上可以复用的PSFCH序列对的数量，
Figure PCTCN2020121690-appb-000021
表示每个PSSCH子信道对应的可用作PSFCH资源的PRB数量。同时资源池还可以通过配置
Figure PCTCN2020121690-appb-000022
限制PSSCH的接收端可以使用的PSFCH资源数量。有以下两种方案：
若资源池配置
Figure PCTCN2020121690-appb-000023
该PSSCH的接收端只能使用其第一个子信道对应的PSFCH资源，即
Figure PCTCN2020121690-appb-000024
例如，在图10所示的PSFCH资源分配示意图中，当PSSCH占用编号为5和9的两个子信道传输数据时，该PSSCH的接收端只能使用编号为5的PSFCH资源进行反馈。
若资源池配置
Figure PCTCN2020121690-appb-000025
该PSSCH的接收端可以使用其所有子信道对应的PSFCH资源进行反馈，即
Figure PCTCN2020121690-appb-000026
接收端选择第
Figure PCTCN2020121690-appb-000027
个PSFCH资源对对应的资源反馈PSFCH，其中P ID表示控制信息中承载的物理层源地址标识，对于组播2来说，M ID为每个接收端的高层为本次接收PSSCH配置的标识，可以理解的是，M ID为接收端用于接收发送 端发送数据的标识，也是接收端同于向发送端发送反馈信息的标识，在其它场景中，M ID＝0。
Figure PCTCN2020121690-appb-000028
个PSFCH资源对按照先频域索引，后码域索引增序排列所有PSFCH序列，在确定PSFCH序列的索引后，能够根据PSFCH序列的索引确定对应的PRB索引和序列的相位。进一步的，当PSFCH序列的索引为
Figure PCTCN2020121690-appb-000029
时，可以根据下列公式确定对应的PRB索引：
Figure PCTCN2020121690-appb-000030
在确定出的PRB上，该PSFCH序列对应的m 0为：
Figure PCTCN2020121690-appb-000031
其中，P ID表示控制信息中承载的物理层源地址标识，M ID为用于接收发送端发送数据的标识，
Figure PCTCN2020121690-appb-000032
为第一反馈资源集合中PRB可传输的PSFCH序列数量，
Figure PCTCN2020121690-appb-000033
表示资源池配置的一个PRB的PSFCH资源上可以复用的PSFCH序列对的数量。
根据上述内容可知，发送端在PSSCH传输SL数据之前，需要向接收端发送资源预约信息。发送端在资源侦听窗口内对频域资源池中其它发送端发送的SCI进行侦听，将其它发送端已预约且参考信号接收功率大于预设门限的资源从候选资源池中删除后，再选择可用资源进行资源预约。但当两个发送端距离较远，互相侦听不到对方发送的SCI时，可能导致两个发送端向接收端预约的资源重叠，造成资源冲突。此时资源重叠可以是部分子信道重叠，或者全部资源重叠。当两个发送端发送SL数据的发送资源冲突时，接收端仅会通过PSFCH反馈该SL数据对应的响应消息，发送端无法获知资源冲突问题，而继续在该预约的资源上重新发送SL数据，进而无法解决资源冲突问题。
基于上述问题，本申请实施例提供一种资源重选辅助方法，用以解决资源冲突问题。该方法的执行主体可以是终端，也可以是具备终端功能的组合器件或部件，也可以是应用于终端中的通信芯片(例如处理器、基带芯片、或芯片系统等)。下文以该方法的执行主体为终端为例进行描述，如图11所示，该方法包括以下步骤：
S1101、第一终端向第三终端发送第一控制信息。
需要说明的是，第一终端发送的第一控制信息用于指示第一资源和第二资源，其中第一资源承载第一控制信息对应的第一数据，第二资源为第一终端预留的资源，具体的，第二资源在时间上位于第一资源之后，是第一终端预约的用于在下一发送周期中发送数据的资源。
可选的，第三终端在接收到第一控制信息之后，确定需要进行资源重选辅助。
具体的，需要进行资源重选辅助是指需要第三终端判断第一终端的第二资源是否存在资源冲突，并在确定第二资源存在资源冲突时，向第一终端发送第一指示信息。
一种可选的实施方式中，根据以下至少一种方式确定需要进行资源重选辅助：
方式1：第一控制信息中包含资源重选触发信息，其中资源重选触发信息用于触发第三终端进行资源重选辅助。
具体实施中，第一控制信息中包含资源重选触发信息，表示第一终端需要第三终端辅助进行资源重选。
方式2：第三终端接收资源使能信息，所述资源重选使能信息用于使能所述资源重选辅助。
具体实施中，第一资源对应的资源池使能资源重选时，向第三终端发送资源重选使能 信息，从而在第三终端接收到资源重选使能信息后，确定需要辅助第一终端进行资源重选。
S1102、第三终端确定第二资源满足重选条件。
具体实施中，第三终端接收来自第二终端的第二控制信息，其中所述第二控制信息指示第三资源和第四资源，其中第四资源承载第二控制信息对应的第二数据，第三资源为第二终端预留的发送资源。第三终端确定第二资源和第三资源重合，具体可以为第二资源和第三资源重叠或部分重合，根据以下至少一种方式确定第二资源满足重选条件：
方式1、第三资源的优先级高于第二资源的优先级。
举例来说，优先级取值为1～8，其中优先级值为1表示优先级最高，优先级值为8表示优先级最低，第三终端在确定第三资源和第二资源重合时，优先接收优先级更高的资源发送的控制信息或数据。如第二资源优先级值为5，第三资源优先级值为2，则确定第三资源的优先级高于第二资源的优先级，确定第二资源满足重选条件。
方式2、第三终端确定第一资源的译码失败次数大于等于第一预设阈值。
需要说明的是，第一预设阈值为大于0的正整数。当第一预设阈值为1时，表示第三终端确定第一资源译码失败时，确定第二资源满足重选条件；当第一预设阈值为N时，表示第三终端确定第一资源连续译码失败次数大于等于N次时，确定第二资源满足重选条件。
方式3、第三终端确定第三资源的优先级高于第二资源的优先级，且第三资源的优先级高于预设的优先级阈值；其中，第三资源为第二终端预留的发送资源。
需要说明的是，预设的优先级阈值为预先配置给第三终端的优先级阈值，在终端的预留资源的优先级高于该优先级阈值时，优先该终端占用该预留资源。
方式4、第三终端确定第四资源上的信号功率测量值大于第一资源上的信号功率测量值，所述信号功率测量值可以是RSRP测量结果。
方式5、第三终端确定第四资源上的信号功率测量值大于预设阈值。
需要说明的是，实施中可以根据以上方式1～方式5的任一方式确定第二资源满足重选条件，也可以根据两个或两个以上方式确定第二资源满足重选条件，即在满足两个或两个以上方式对应的条件时，确定第二资源满足重选条件；例如根据方式4和方式5确定第二资源满足重选条件时，第三终端在确定第四资源上的信号功率测量值大于第一资源上的信号功率测量值，且第四资源上的信号功率测量值大于预设阈值时，确定第二资源满足重选条件。
可以理解的是，第三终端确定第二资源满足重选条件，即确定第二资源存在资源冲突，需要第三终端指示第一终端对第二资源进行资源重选。其中，资源重选是指第一终端重新对资源池内的资源进行侦听和选择，从而将重新选择的资源作为第二资源。
S1103、第三终端向第一终端发送第一指示信息，第一指示信息用于指示重选所述第二资源。
具体实施中，第三终端根据下列方式确定发送第一指示信息使用的时频资源：
针对时域资源，第三终端发送第一指示信息使用的时域资源占用PSFCH所在的时隙中最后一个GAP前的最后两个OFDM符号。
针对频域资源，根据前述内容可知，在通过PSFCH发送反馈信息时，根据资源池配置的PSFCH频域资源的比特位图确定可以用作PSFCH的传输资源，比特地图中比特值为1表示该比特位对应的PRB可以用作PSFCH传输，比特值为0表示该比特位对应的PRB不可以用作PSFCH传输。
本申请实施例中，将比特值为1的比特位对应的PRB资源集合中第一资源对应的PRB组成的集合称为第一反馈资源集合，将比特值为0的比特位对应的PRB组成的集合称为第二反馈资源集合。
举例来说，参阅图10，当
Figure PCTCN2020121690-appb-000034
且
Figure PCTCN2020121690-appb-000035
即为每个时隙的每个PSSCH子信道分配一个PRB的PSFCH反馈资源，若第一终端发送的控制信息指示第一资源占用图中编号为5和9的PSSCH子信道，则第一资源对应的PRB为5和9，也即第一反馈资源集合中包括图10中编号为5和9的PRB。
参阅图8，PSFCH占用编号为11和12的OFDM符号，在其对应的频域资源中，将比特值为0的比特位对应的PRB组成的集合称为第二反馈资源集合，如图8中虚线框内的PRB组成第二反馈资源集合。
一种可能的实施方式中，第一指示信息为第一序列和第二序列；其中第一序列用于传输第一资源对应的肯定应答响应ACK，第二序列用于传输第一资源对应的否定应答响应NACK。
我们知道，在单播和组播2场景中，当第三终端能够正确译码第一资源时，通过第一序列向第一终端反馈ACK；否则，通过第二序列向第一终端反馈NACK。则在本实施方式中，定义若第三终端确定第二资源满足重选条件，则向第一终端同时发送第一序列和第二序列。
进一步地，在第一反馈资源集合中的对应PRB资源上发送第一序列和第二序列。
具体实施可以参见前述公式3至公式7以及表1所述内容，此处不再赘述。
另一种可能的实施方式中，第一指示信息为第三序列，所述第三序列与第一序列和第二序列不同。
具体实施中，当第一指示信息为第三序列时，可以通过以下方式发送所述第三序列：
方式1、在第一反馈资源集合中的第一PRB上发送第三序列；其中第一PRB与承载第一序列和第二序列的PRB相同，第三序列的相位相对于第一序列或第二序列相位偏移第一参考值。
需要说明的是，序列相位具体可以为相位旋转值α，根据前述内容可知，相位旋转值α的值可以由m 0和/或m cs确定，其中，m 0可以为PRB上的一对PSFCH序列对中第一个序列的相位，m cs为该PSFCH序列对中第二个序列相对于第一个序列的相位偏移。
一种可能的实施方式为，例如组播1场景下，若组内用户终端能够正确译码PSSCH对应的PSCCH，但是PSSCH译码失败，则反馈携带NACK信息的PSFCH序列，否则不反馈任何信息。参照表2可知，组播1场景仅占用了第一PRB上的m cs＝0的PSFCH序列传输NACK，也就是说，第二序列的相位为m cs＝0，则可以将第一PRB上相对于第二序列相位偏移m cs＝6的PSFCH序列作为第三序列。
另一种可能的实施方式为，当资源池配置的第一反馈资源集合中的PRB上能够复用多对PSFCH序列对，即
Figure PCTCN2020121690-appb-000036
且第三终端仅使用了第一PRB上的第一序列和第二序列，则可以将第一PRB上的除第一序列和第二序列以外的PSFCH序列作为第三序列，如第三序列的相位相对于第一序列或第二序列的相位偏移第一参考值，具体可以为第三序列与第一序列和第二序列的m 0不同，第三序列与第一序列或第二序列的m cs相同，即生成第三序列的m′ 0＝(m 0+P)mod 6，P表示第一参考值，为正整数，可以是1,2,3,4或5。或者第三序列与第一序列和第二序列的m 0相同，第三序列与第一序列或第二序列的m cs不同， 即生成第三序列的m′ cs＝(m cs+Q)mod 6,Q表示第一参考值，为正整数，可以是1,2,3,4或5。
方式2、在第一反馈资源集合中的第二PRB上发送第三序列；其中第二PRB与第一PRB在第一反馈资源集合中相邻，第三序列与第一序列或第二序列的相位相同。
具体实施中，在第一反馈资源集合中与第一PRB相邻的第二PRB上发送第三序列，需要说明的是，第一PRB与第二PRB相邻是指在第一反馈资源集合中逻辑相邻，例如，单播场景下，假设第一PRB的索引为x，则第二PRB的索引为
Figure PCTCN2020121690-appb-000037
Figure PCTCN2020121690-appb-000038
或
Figure PCTCN2020121690-appb-000039
x1表示第一反馈资源集合中PRB索引大于x的第一个可用PRB，x2表示第一反馈资源集合中PRB索引小于x的第一个可用PRB。其中，
Figure PCTCN2020121690-appb-000040
表示可以使用
Figure PCTCN2020121690-appb-000041
个PSSCH子信道对应的PSFCH资源；
Figure PCTCN2020121690-appb-000042
表示每个PSSCH子信道对应的可用作PSFCH资源的PRB数量。
需要说明的是，若x为第一反馈资源集合中PRB索引值最小的索引，则x2循环向上，实际为第一反馈资源集合中PRB索引值最大的索引，若x为第一反馈资源集合中PRB索引值最大的索引，则x1循环向下，实际为第一反馈资源集合中PRB索引值最小的索引。例如当第一资源集合中有4个PRB资源，逻辑编号分别为0，1，2，3，若x＝1，则x1＝2，x2＝0；若x＝0，则x1＝1，x2＝3；若x＝3，则x1＝0，x2＝2。
也就是说，第一PRB与第二PRB在第一反馈资源集合中相邻，是指第一PRB与第二PRB在第一反馈资源集合中逻辑相邻，举例来说，参阅图10，当
Figure PCTCN2020121690-appb-000043
且
Figure PCTCN2020121690-appb-000044
若第一终端发送的控制信息指示第一资源占用图中编号为5和9的PSSCH子信道，则第一反馈资源集合中包括PSFCH资源中编号为5和9的PRB，则当第一PRB为编号为5的PRB时，第二PRB为编号为9的PRB。
第三序列的相位可以与第一序列或第二序列的相位相同，例如第三序列的m 0值和m cs值与第一序列或第一序列的m 0值和m cs值相同。
方式3、在第二反馈资源集合中的第三PRB上发送第三序列；第三序列的索引满足：
Figure PCTCN2020121690-appb-000045
P ID为第一控制信息中承载的物理层源地址标识，M ID为第三终端用于接收所述第一数据的标识，
Figure PCTCN2020121690-appb-000046
为第二反馈资源集合中PRB可传输的PSFCH序列数量。
可以理解的是，
Figure PCTCN2020121690-appb-000047
个PSFCH序列是按照先频域后码域的顺序增序排列并编码的，因此，在确定第三序列的索引后，即可确定第三序列位于的第三PRB在第二反馈资源集合中的索引，进而确定第三PRB位置以及第三序列的相位；具体实施可以参见公式5～公式7，此处不再赘述。
S1104、第一终端对第二资源进行资源重选。
具体实施中，第一终端可以重新在资源池内进行侦听，重选第二资源。
本申请实施例还提供一种资源重评估方法，该方法的执行主体可以是终端，也可以是具备终端功能的组合器件或部件，也可以是应用于终端中的通信芯片(例如处理器、基带芯片、或芯片系统等)。以该方法的执行主体为终端为例，如图12所示，该方法包括以下步骤：
S1201、第一终端向第三终端发送第一控制信息。
第一控制信息指示第一资源和第二资源，第一资源承载所述第一控制信息对应的第一数据，第二资源为第一终端预留的发送资源。
S1202、第三终端向第一终端发送第一资源对应的NACK。
S1203、第一终端确定收到第一资源对应的NACK的次数大于第二预设阈值，对第二资源进行资源重选。
下面以几个具体实施例对本申请提供的资源重选方法进行进一步介绍：
在一些实施例中，第一终端在一个发送周期内预约多次PSSCH资源向第三终端发送数据，例如图13所示，第一终端在一个发送周期内预约三次PSSCH资源：T01、T02、T03；其中，T01用于进行初传，T02、T03用于同一数据的进行重传。设计第二预设阈值P，若第一终端接收到T02对应的NACK反馈信息的次数大于P，则在下一发送周期内停止使用T02传输资源，并进行资源重选，重新在资源池中选择可用资源代替T02传输资源。
需要说明的是，第二预设阈值可以是配置到资源池上，并由资源池下发给终端的；也可以是资源池配置业务优先级与阈值的对应关系，第三终端通过查询所述业务优先级与阈值的对应关系确定自身业务优先级对应的阈值。
在一些实施例中，例如单播和组播2场景，第一终端向第三终端发送控制信息，该控制信息指示第一资源和第二资源，第一资源承载控制信息对应的第一数据，第二资源为第一终端预留的发送资源。
第三终端确定第二资源满足资源重选条件，向第一终端发送第一指示信息；其中第一指示信息为第一序列和第二序列，第一序列用于承载第一资源对应的肯定应答响应ACK，第二序列用于承载第一资源对应的否定应答响应NACK。
具体的，在第一反馈资源集合中的第一PRB上发送第一序列；同时该PRB上发送第二序列。
第一终端在同时接收到第一资源对应的ACK和NACK后，确定第二资源存在资源冲突，对第二资源进行资源重选。
在一些实施例中，例如在组播1场景下，第一终端向第三终端发送控制信息，该控制信息指示第一资源和第二资源，第一资源承载控制信息对应的第一数据，第二资源为第一终端预留的发送资源。
我们知道，第三终端在正确译码PSCCH，但是其对应PSSCH译码失败时，会向第一终端反馈用于传输NACK的第二序列，假设第二序列位于第一PRB上，且m cs＝0。
第三终端确定第二资源满足资源重选条件，向第一终端发送第一指示信息，其中第一指示信息为第三序列。具体实施中，在第一反馈资源集合中的第一PRB上的第三序列向第一终端反馈第一指示信息。第三序列的相位相对于第二序列相位偏移第一参考值，具体可以为第三序列的m cs＝6。
第一终端在接收到第三终端发送的第一指示信息后，确定第二资源存在资源冲突，对第二资源进行资源重选。
在一些实施例中，例如单播场景下，当资源池配置的第一反馈资源集合中PRB可复用的PSFCH序列数量
Figure PCTCN2020121690-appb-000048
时，表示第一反馈资源集合中一个PRB上可复用的PSFCH序列对数量大于等于2。
第一终端向第三终端发送控制信息，该控制信息指示第一资源和第二资源，第一资源承载控制信息对应的第一数据，第二资源为第一终端预留的发送资源。
我们知道，第三终端在正确译码第一终端发送的PSSCH时，向第一终端反馈用于传输ACK的第一序列；否则，向第一终端反馈用于传输NACK的第二序列，第一序列和第 二序列为第一反馈资源集合中的第一PRB上的一个PSFCH序列对，且第一序列的m cs＝0，第二序列的m cs＝6。
第三终端确定第一资源满足重选条件，向第一终端发送第一指示信息，其中第一指示信息为第三序列。具体实施中，在第一反馈资源集合中的第一PRB上发送第三序列，其中第三序列与第一序列和第二序列不同。进一步地，第三序列可以为第一PRB上复用的PSFCH序列中除第一序列和第二序列以外的PSFCH序列。如第三序列的相位相对于第一序列或第二序列的相位偏移第一参考值，具体可以为第三序列的m′ 0与第一序列和第二序列的m 0不同，第三序列与第一序列或第二序列的m cs相同，即生成第三序列的m′ 0＝(m 0+P)mod 6，P表示第一参考值，为正整数，可以是1,2,3,4或5；或第三序列与第一序列和第二序列的m 0相同，第三序列的m′ cs与第一序列或第二序列的m cs不同，即生成第三序列的m′ cs＝(m cs+Q)mod 6,Q表示第一参考值，为正整数，可以是1,2,3,4或5。
举例来说，当
Figure PCTCN2020121690-appb-000049
时，第三序列的m′ 0＝(m 0+3)mod6，m cs＝0或m cs＝6。
当
Figure PCTCN2020121690-appb-000050
时，第三序列的m′ 0＝(m 0+4)mod6，m cs＝0或m cs＝6。
当
Figure PCTCN2020121690-appb-000051
时，第三序列的m′ 0＝(m 0+3)mod6，m cs＝0或m cs＝6。
或者，当
Figure PCTCN2020121690-appb-000052
时，第三序列的m′ 0＝m 0，m′ cs＝(m cs+3)mod6。
当
Figure PCTCN2020121690-appb-000053
时，第三序列的m′ 0＝m 0，m′ cs＝(m cs+5)mod6。
当
Figure PCTCN2020121690-appb-000054
时，第三序列的m′ 0＝m 0，m′ cs＝(m cs+2)mod6。
第一终端在接收到第三终端发送的第一指示信息后，确定第二资源存在资源冲突，对第二资源进行资源重选。
在一些实施例中，例如单播场景下，若资源池为每个PSSCH子信道分配的用于PSFCH反馈的PRB数量
Figure PCTCN2020121690-appb-000055
表示第一反馈资源集合中包括至少两个PRB。
第一终端向第三终端发送控制信息，该控制信息指示第一资源和第二资源，第一资源承载控制信息对应的第一数据，第二资源为第一终端预留的发送资源。
我们知道，第三终端在正确译码第一终端发送的PSSCH时，向第一终端反馈用于传输ACK的第一序列；否则，向第一终端反馈用于传输NACK的第二序列，第一序列和第二序列为第一反馈资源集合中的第一PRB上的一个PSFCH序列对，且第一序列的m cs＝0，第二序列的m cs＝6。
第三终端确定第二资源满足重选条件，向第一终端发送第一指示信息，其中第一指示信息为第三序列。具体实施中，在第一反馈资源集合中与第一PRB在相邻的第二PRB上发送第三序列。根据前述内容，若第一PRB的索引为：
Figure PCTCN2020121690-appb-000056
则第二PRB的索引为
Figure PCTCN2020121690-appb-000057
或
Figure PCTCN2020121690-appb-000058
第三序列的相位可以与第一序列或第二序列的相位相同，例如第三序列的m′ 0值与第一序列或第一序列的m 0值相同，可以根据下列公式确定m′ 0：
Figure PCTCN2020121690-appb-000059
第三序列的m cs与第一序列或第二序列的m cs值相同，如第三序列的m cs＝0或m cs＝6。
其中，P ID表示控制信息中承载的物理层源地址标识，M ID为第三终端用于接收所述第一数据的标识，
Figure PCTCN2020121690-appb-000060
为第一反馈资源集合中PRB可传输的PSFCH序列数量，
Figure PCTCN2020121690-appb-000061
表 示资源池配置的一个PRB的PSFCH资源上可以复用的PSFCH序列对的数量，
Figure PCTCN2020121690-appb-000062
表示可以使用
Figure PCTCN2020121690-appb-000063
个PSSCH子信道对应的PSFCH资源。
第一终端在接收到第三终端发送的第一指示信息后，确定第二资源存在资源冲突，对第二资源进行资源重选。
在一些实施例中，第一终端向第三终端发送控制信息，该控制信息指示第一资源和第二资源，第一资源承载控制信息对应的第一数据，第二资源为第一终端预留的发送资源。
第三终端确定第二资源满足重选条件，向第一终端发送第一指示信息，其中第一指示信息为第三序列。具体实施中，在第二反馈资源集合中的PRB上发送第三序列。
一种可选的实施方式为，第三序列的索引满足：
Figure PCTCN2020121690-appb-000064
则该PRB在第二反馈资源集合中的索引满足：
Figure PCTCN2020121690-appb-000065
进一步地，第三序列可以根据下列公式确定m′ 0：
Figure PCTCN2020121690-appb-000066
第三序列的m cs与第一序列或第二序列的m cs值相同，如第三序列的m cs＝0或m cs＝6。
其中，P ID为第一控制信息中承载的物理层源地址标识，M ID为第三终端用于接收所述第一数据的标识，
Figure PCTCN2020121690-appb-000067
为第二反馈资源集合中子资源可传输的序列数量，
Figure PCTCN2020121690-appb-000068
表示资源池配置的一个PRB的PSFCH资源上可以复用的PSFCH序列对的数量，
Figure PCTCN2020121690-appb-000069
表示可以使用
Figure PCTCN2020121690-appb-000070
个PSSCH子信道对应的PSFCH资源。
第一终端在接收到第三终端发送的第一指示信息后，确定第二资源存在资源冲突，对第二资源进行资源重选。
需要说明的是，组播2场景下，组内每个终端使用不同的PSFCH序列对反馈ACK和NACK，当资源池配置的PSFCH频域资源的比特位图中比特值为0的比特位数量大于等于比特值为1的比特位数量时，可以根据本实施例提供的方式实施。
或者，当资源池配置的PSFCH频域资源的比特位图中比特值为0的比特位数量大于等于
Figure PCTCN2020121690-appb-000071
即可以保证每个PSSCH子信道都有对应的PRB用于发送第三序列时，可以根据本实施例提供的方式实施。
基于相同的技术构思，本申请还提供了一种通信装置1400，该通信装置1400可以是终端，也可以是具备终端功能的部件或组件，也可以是应用于终端中的芯片(例如基带芯片)，所述功能或模块可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现，还可以通过软件和硬件结合的方式实现。该通信装置也可以是其他通信模块,用于实现本申请方法实施例中的方法。该通信装置1400的结构如图14所示，包括接收单元1401、处理单元1402和发送单元1403。一种示例中，发送单元1403可以是发射器，接收单元1401可以是接收器，发射器可以包括天线和射频电路等，接收器也可以包括天线和射频电路等，发射器和接收器可以属于一个功能模块，例如称为收发器，或者发射器和接收器也可以是彼此独立的功能模块；处理单元1402可以是处理器，例如基带处理器，基带处理器中可以包括一个或多个中央处理单元(central processing unit，CPU)。另一种示例中，发送单元1403和接收单元1401可以是射频单元，处理单元1402可以是处理器，例如基带处理器。又一种示例中，发送单元1403和接收单元1401可以是芯片(例如基带芯片)的输入输出接口(例如发送单元1403是输出接口，接收单元1401是输入接口，或 者输入和输出是同一接口，则发送单元1403和接收单元1401均是该接口)、处理单元1402可以是芯片系统的处理器，可以包括一个或多个中央处理单元。应理解，本申请实施例中的处理单元1402可以由处理器或处理器相关电路组件实现，发送单元1403可以由发射器或发射器相关电路组件实现，接收单元1401可以由接收器或接收器相关电路组件实现。
所述通信装置1400可以应用于图11所示的第三终端，并可以实现上述实施例提供的资源重选辅助方法。下面对所述通信装置1400的各个单元的功能进行介绍。
所述接收单元1401，用于接收来自第一终端的控制信息，其中所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；
所述处理单元1402，用于确定所述第二资源满足重选条件；
所述发送单元1403，用于向所述第一终端发送指示信息，所述指示信息用于指示重选所述第二资源。
在一种实施方式中，所述控制信息中包含资源重选触发信息，其中所述资源重选触发信息用于触发所述资源重选辅助；和/或，所述接收单元还用于接收资源重选使能信息，所述资源重选使能信息用于使能所述资源重选辅助。
在一种实施方式中，所述处理单元1402具体用于：确定所述第二资源和第三资源重合，且所述第三资源的优先级高于所述第二资源的优先级；其中，所述第三资源为第二终端预留的发送资源。
在一种实施方式中，所述指示信息为第一序列和第二序列；其中所述第一序列用于承载所述第一资源对应的肯定应答响应ACK，所述第二序列用于承载所述第一资源对应的否定应答响应NACK；或者，所述指示信息为第三序列，所述第三序列与所述第一序列和所述第二序列不同。
在一种实施方式中，所述指示信息为第一序列和第二序列；所述发送单元1403具体用于：在第一反馈资源集合中的反馈资源上发送所述第一序列和第二序列；其中，所述第一反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源中第一资源对应的反馈资源。
在一种实施方式中，所述指示信息为第三序列；所述发送单元1403具体用于：在第一反馈资源集合中的第一反馈资源上发送所述第三序列；其中所述第一反馈资源与用于承载所述第一序列或所述第二序列的反馈资源的频域重合，且所述第三序列的相位相对于所述第一序列的相位或所述第二序列相位偏移第一参考值；或者在所述第一反馈资源集合中的第二反馈资源上发送所述第三序列；其中所述第二反馈资源与用于承载所述第一序列或所述第二序列的反馈资源在所述第一反馈资源集合中相邻，所述第三序列的相位与所述第一序列的相位或所述第二序列的相位相同；其中，所述第一反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源中第一资源对应的反馈资源。
在一种实施方式中，所述指示信息为第三序列，所述发送单元1403具体用于：在第二反馈资源集合中的反馈资源上发送所述第三序列；所述第三序列的索引满足：
Figure PCTCN2020121690-appb-000072
P ID为所述控制信息中承载的物理层源地址标识，M ID为用于接收所述第一数据的标识，
Figure PCTCN2020121690-appb-000073
为所述第二反馈资源集合中反馈资源可传输的序列数量；其中，所述第二反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源对应的比特位图中比特值为0的比特位对应的反馈资源。
基于相同的技术构思，本申请还提供了一种通信装置1500，该通信装置1500可以是终端，也可以是具备终端功能的部件或组件，也可以是应用于终端中的芯片(例如基带芯片)，所述功能或模块可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现，还可以通过软件和硬件结合的方式实现。该通信装置也可以是其他通信模块,用于实现本申请方法实施例中的方法。该通信装置1500的结构如图15所示，包括发送单元1501、接收单元1502和处理单元1503。一种示例中，发送单元1501可以是发射器，接收单元1502可以是接收器，发射器可以包括天线和射频电路等，接收器也可以包括天线和射频电路等，发射器和接收器可以属于一个功能模块，例如称为收发器，或者发射器和接收器也可以是彼此独立的功能模块；处理单元1503可以是处理器，例如基带处理器，基带处理器中可以包括一个或多个中央处理单元(central processing unit，CPU)。另一种示例中，发送单元1501和接收单元1502可以是射频单元，处理单元1503可以是处理器，例如基带处理器。又一种示例中，发送单元1501和接收单元1502可以是芯片(例如基带芯片)的输入输出接口(例如发送单元1501是输出接口，接收单元1502是输入接口，或者输入和输出是同一接口，则发送单元1501和接收单元1502均是该接口)、处理单元1503可以是芯片系统的处理器，可以包括一个或多个中央处理单元。应理解，本申请实施例中的处理单元1503可以由处理器或处理器相关电路组件实现，发送单元1501可以由发射器或发射器相关电路组件实现，接收单元1502可以由接收器或接收器相关电路组件实现。
所述通信装置1500可以应用于图11所示的第一终端，并可以实现上述实施例提供的资源重选的方法。下面对所述通信装置1500的各个单元的功能进行介绍。
所述发送单元1501，用于向第三终端发送控制信息，所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；
所述接收单元1502，用于接收所述第三终端发送的第一指示信息；
所述处理单元1503，用于对所述第二资源进行资源重选。
在一种实施方式中，所述控制信息还包括资源重选触发信息，所述资源重选触发信息用于触发所述第三终端进行资源重选辅助。
在一种实施方式中，所述接收单元具体用于：接收所述第三终端发送的第一序列和第二序列；其中所述第一序列用于传输所述第一资源对应的肯定应答响应ACK，所述第二序列用于传输所述第一资源对应的否定应答响应NACK；或者接收所述第三终端发送的第三序列；所述第三序列与所述第一序列和所述第二序列不同。
基于相同的技术构思，本申请还提供了一种通信装置1600，该通信装置1600可以是终端，也可以是具备终端功能的部件或组件，也可以是应用于终端中的芯片(例如基带芯片)，所述功能或模块可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现，还可以通过软件和硬件结合的方式实现。该通信装置也可以是其他通信模块,用于实现本申请方法实施例中的方法。该通信装置的结构如图16所示，包括发送单元1601、处理单元1602和接收单元1603。一种示例中，发送单元1601可以是发射器，接收单元1603可以是接收器，发射器可以包括天线和射频电路等，接收器也可以包括天线和射频电路等，发射器和接收器可以属于一个功能模块，例如称为收发器，或者发射器和接收器也可以是彼此独立的功能模块；处理单元1602可以是处理器，例如基带处理器，基带处理器中可以包括一个或多个中央处理单元(central processing unit，CPU)。另一种示例中， 发送单元1601和接收单元1603可以是射频单元，处理单元1602可以是处理器，例如基带处理器。又一种示例中，发送单元1601和接收单元1603可以是芯片(例如基带芯片)的输入输出接口(例如发送单元1601是输出接口，接收单元1603是输入接口，或者输入和输出是同一接口，则发送单元1601和接收单元1603均是该接口)、处理单元1602可以是芯片系统的处理器，可以包括一个或多个中央处理单元。应理解，本申请实施例中的处理单元1602可以由处理器或处理器相关电路组件实现，发送单元1601可以由发射器或发射器相关电路组件实现，接收单元1603可以由接收器或接收器相关电路组件实现。
所述通信装置1600可以应用于图12所示的第一终端，并可以实现上述实施例提供的资源重选的方法。下面对所述通信装置1600的各个单元的功能进行介绍。
所述发送单元1601，用于向第三终端发送控制信息，所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；
所述处理单元1602，用于确定通过所述接收单元1603接收所述第一资源对应的否定应答响应NACK的次数大于预设阈值；对所述第二资源进行资源重选。
基于相同的技术构思，本申请还提供了一种通信装置1700，该通信装置的结构如图17所示，所述通信装置1700可以应用于如图11所示的第三终端，可以实现以上实施例提供的资源重选辅助方法，参阅图17，所述通信装置1700包括：通信模块1701、处理器1702以及存储器1703。其中，所述通信模块1701、所述处理器1702以及所述存储器1703之间相互连接。
可选的，所述通信模块1701、所述处理器1702以及所述存储器1703之间互相耦合连接。
所述通信模块1701，用于接收和发送数据，实现与其他设备之间的通信交互。例如，当所述通信装置1700应用于图11所示的第三终端时，所述通信模块1701可以通过物理接口、通信模块、通信接口、输入输出接口实现。
所述处理器1702用于通过所述通信模块1701接收来自第一终端的控制信息，其中所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；确定所述第二资源满足重选条件；通过所述通信模块1701向所述第一终端发送指示信息，所述指示信息用于指示重选所述第二资源。
在一种实施方式中，所述控制信息中包含资源重选触发信息，其中所述资源重选触发信息用于触发所述资源重选辅助；和/或，
所述处理器1702还用于通过所述通信模块1701接收资源重选使能信息，所述资源重选使能信息用于使能所述资源重选辅助。
在一种实施方式中，所述处理器1702具体用于：确定所述第二资源和第三资源重合，且所述第三资源的优先级高于所述第二资源的优先级；其中，所述第三资源为第二终端预留的发送资源。
在一种实施方式中，所述指示信息为第一序列和第二序列；其中所述第一序列用于承载所述第一资源对应的肯定应答响应ACK，所述第二序列用于承载所述第一资源对应的否定应答响应NACK；或者，所述指示信息为第三序列，所述第三序列与所述第一序列和所述第二序列不同。
在一种实施方式中，所述指示信息为第一序列和第二序列；所述处理器1702具体用于：通过所述通信模块1701在第一反馈资源集合中的反馈资源上发送所述第一序列和第二序列；其中，所述第一反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源中第一资源对应的反馈资源。
在一种实施方式中，所述指示信息为第三序列；所述处理器1702具体用于：通过所述通信模块1701在第一反馈资源集合中的第一反馈资源上发送所述第三序列；其中所述第一反馈资源与用于承载所述第一序列或所述第二序列的反馈资源的频域重合，且所述第三序列的相位相对于所述第一序列的相位或所述第二序列相位偏移第一参考值；或者
通过所述通信模块1701在所述第一反馈资源集合中的第二反馈资源上发送所述第三序列；其中所述第二反馈资源与用于承载所述第一序列或所述第二序列的反馈资源在所述第一反馈资源集合中相邻，所述第三序列的相位与所述第一序列的相位或所述第二序列的相位相同；
其中，所述第一反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源中第一资源对应的反馈资源。
在一种实施方式中，所述指示信息为第三序列，所述处理器1702具体用于：通过所述通信模块1701在第二反馈资源集合中的反馈资源上发送所述第三序列；所述第三序列的索引满足：
Figure PCTCN2020121690-appb-000074
P ID为所述控制信息中承载的物理层源地址标识，M ID为用于接收所述第一数据的标识，
Figure PCTCN2020121690-appb-000075
为所述第二反馈资源集合中反馈资源可传输的序列数量；
其中，所述第二反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源对应的比特位图中比特值为0的比特位对应的反馈资源。
所述存储器1703，用于存放程序指令和数据等。具体地，程序指令可以包括程序代码，该程序代码包括计算机操作指令。存储器1703可能包含随机存取存储器(random access memory，RAM)，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。处理器1702执行存储器1703所存放的程序指令，并使用所述存储器1703中存储的数据，实现上述功能，从而实现上述实施例提供的资源重选辅助方法。
可以理解，本申请图17中的存储器1703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。
基于相同的技术构思，本申请还提供了一种通信装置1800，该通信装置的结构如图 18所示，所述通信装置1800可以应用于如图11所示的第一终端，可以实现以上实施例提供的资源重选的方法，参阅图18，所述通信装置1800包括：通信模块1801、处理器1802以及存储器1803。其中，所述通信模块1801、所述处理器1802以及所述存储器1803之间相互连接。
可选的，所述通信模块1801、所述处理器1802以及所述存储器1803之间互相耦合连接。
所述通信模块1801，用于接收和发送数据，实现与其他设备之间的通信交互。例如，当所述通信装置1800应用于图11所示的第一终端时，所述通信模块1801可以通过物理接口、通信模块、通信接口、输入输出接口实现。
所述处理器1802用于通过所述通信模块1801向第三终端发送控制信息，所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；并通过所述通信模块1801接收所述第三终端发送的第一指示信息后，对所述第二资源进行资源重选。
在一种实施方式中，所述控制信息还包括资源重选触发信息，所述资源重选触发信息用于触发所述第三终端进行资源重选辅助。
在一种实施方式中，所述处理器1802具体用于：通过所述通信模块1801接收所述第三终端发送的第一序列和第二序列；其中所述第一序列用于传输所述第一资源对应的肯定应答响应ACK，所述第二序列用于传输所述第一资源对应的否定应答响应NACK；或者
通过所述通信模块1801接收所述第三终端发送的第三序列；所述第三序列与所述第一序列和所述第二序列不同。
所述存储器1803，用于存放程序指令和数据等。具体地，程序指令可以包括程序代码，该程序代码包括计算机操作指令。存储器1803可能包含随机存取存储器(random access memory，RAM)，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。处理器1802执行存储器1803所存放的程序指令，并使用所述存储器1803中存储的数据，实现上述功能，从而实现上述实施例提供的资源重选的方法。
可以理解，本申请图18中的存储器1803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。
基于相同的技术构思，本申请还提供了一种通信装置1900，该通信装置的结构如图19所示，所述通信装置1900可以应用于如图12所示的第一终端，可以实现以上实施例提 供的资源重选的方法，参阅图19，所述通信装置1900包括：通信模块1901、处理器1902以及存储器1903。其中，所述通信模块1901、所述处理器1902以及所述存储器1903之间相互连接。
可选的，所述通信模块1901、所述处理器1902以及所述存储器1903之间互相耦合或连接。
所述通信模块1901，用于接收和发送数据，实现与其他设备之间的通信交互。例如，当所述通信装置1900应用于图12所示的第一终端时，所述通信模块1901可以通过物理接口、通信模块、通信接口、输入输出接口实现。
所述处理器1902用于通过所述通信模块1901向第三终端发送控制信息，所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；在确定接收所述第一资源对应的否定应答响应NACK的次数大于预设阈值时，对所述第二资源进行资源重选。
所述存储器1903，用于存放程序指令和数据等。具体地，程序指令可以包括程序代码，该程序代码包括计算机操作指令。存储器1903可能包含随机存取存储器(random access memory，RAM)，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。处理器1902执行存储器1903所存放的程序指令，并使用所述存储器1903中存储的数据，实现上述功能，从而实现上述实施例提供的资源重选的方法。
可以理解，本申请图19中的存储器1903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。
基于以上实施例，本申请实施例还提供了一种计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行以上实施例提供的资源重选辅助或资源重选的方法。
基于以上实施例，本申请实施例还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有计算机程序，所述计算机程序被计算机执行时，使得计算机执行以上实施例提供的资源重选辅助或资源重选的方法。
其中，存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实 施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的保护范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (23)

  1. 一种资源重选辅助的方法，其特征在于，该方法包括：
    接收来自第一终端的控制信息，其中所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；
    确定所述第二资源满足重选条件；
    向所述第一终端发送指示信息，所述指示信息用于指示重选所述第二资源。
  2. 如权利要求1所述的方法，其特征在于，所述控制信息中包含资源重选触发信息，其中所述资源重选触发信息用于触发所述资源重选辅助；和/或，
    所述方法还包括：
    接收资源重选使能信息，所述资源重选使能信息用于使能所述资源重选辅助。
  3. 如权利要求2所述的方法，其特征在于，所述确定所述第二资源满足重选条件，包括：
    确定所述第二资源和第三资源重合，且所述第三资源的优先级高于所述第二资源的优先级；其中，所述第三资源为第二终端预留的发送资源。
  4. 如权利要求1所述的方法，其特征在于，所述指示信息为第一序列和第二序列；其中所述第一序列用于承载所述第一资源对应的肯定应答响应ACK，所述第二序列用于承载所述第一资源对应的否定应答响应NACK；或者，
    所述指示信息为第三序列，所述第三序列与所述第一序列和所述第二序列不同。
  5. 如权利要求4所述的方法，其特征在于，所述指示信息为第一序列和第二序列；所述向所述第一终端发送指示信息，包括：
    在第一反馈资源集合中的反馈资源上发送所述第一序列和第二序列；
    其中，所述第一反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源中第一资源对应的反馈资源。
  6. 如权利要求4所述的方法，其特征在于，所述指示信息为第三序列；所述向所述第一终端发送指示信息，包括：
    在第一反馈资源集合中的第一反馈资源上发送所述第三序列；其中所述第一反馈资源与用于承载所述第一序列或所述第二序列的反馈资源的频域重合，且所述第三序列的相位相对于所述第一序列的相位或所述第二序列相位偏移第一参考值；或者
    在所述第一反馈资源集合中的第二反馈资源上发送所述第三序列；其中所述第二反馈资源与用于承载所述第一序列或所述第二序列的反馈资源在所述第一反馈资源集合中相邻，所述第三序列的相位与所述第一序列的相位或所述第二序列的相位相同；
    其中，所述第一反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源中第一资源对应的反馈资源。
  7. 如权利要求4所述的方法，其特征在于，所述指示信息为第三序列，所述向所述第一终端发送指示信息，包括：
    在第二反馈资源集合中的反馈资源上发送所述第三序列；所述第三序列的索引满足：
    Figure PCTCN2020121690-appb-100001
    P ID为所述第一控制信息中承载的物理层源地址标识，M ID为用于接收所述第一数据的标识，
    Figure PCTCN2020121690-appb-100002
    为所述第二反馈资源集合中反馈资源可传输的序列 数量；
    其中，所述第二反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源对应的比特位图中比特值为0的比特位对应的反馈资源。
  8. 一种资源重选方法，其特征在于，该方法包括：
    向第三终端发送控制信息，所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；
    接收所述第三终端发送的指示信息；
    对所述第二资源进行资源重选。
  9. 如权利要求8所述的方法，其特征在于，所述控制信息还包括资源重选触发信息，所述资源重选触发信息用于触发所述第三终端进行资源重选辅助。
  10. 如权利要求8所述的方法，其特征在于，所述接收第三终端发送的指示信息，包括：
    接收所述第三终端发送的第一序列和第二序列；其中所述第一序列用于传输所述第一资源对应的肯定应答响应ACK，所述第二序列用于传输所述第一资源对应的否定应答响应NACK；或者
    接收所述第三终端发送的第三序列；所述第三序列与所述第一序列和所述第二序列不同。
  11. 一种资源重选的方法，其特征在于，该方法包括：
    向第三终端发送控制信息，所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；
    确定接收所述第一资源对应的否定应答响应NACK的次数大于预设阈值；
    对所述第二资源进行资源重选。
  12. 一种通信装置，其特征在于，包括：
    接收单元，用于接收来自第一终端的控制信息，其中所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；
    处理单元，用于确定所述第二资源满足重选条件；
    发送单元，用于向所述第一终端发送指示信息，所述指示信息用于指示重选所述第二资源。
  13. 如权利要求12所述的通信装置，其特征在于，所述控制信息中包含资源重选触发信息，其中所述资源重选触发信息用于触发所述资源重选辅助；和/或，
    所述接收单元还用于接收资源重选使能信息，所述资源重选使能信息用于使能所述资源重选辅助。
  14. 如权利要求13所述的通信装置，其特征在于，所述第一处理单元具体用于：
    确定所述第二资源和第三资源重合，且所述第三资源的优先级高于所述第二资源的优先级；其中，所述第三资源为第二终端预留的发送资源。
  15. 如权利要求12所述的通信装置，其特征在于，所述指示信息为第一序列和第二序列；其中所述第一序列用于承载所述第一资源对应的肯定应答响应ACK，所述第二序列用于承载所述第一资源对应的否定应答响应NACK；或者，
    所述指示信息为第三序列，所述第三序列与所述第一序列和所述第二序列不同。
  16. 如权利要求15所述的通信装置，其特征在于，所述指示信息为第一序列和第二序列；所述第一发送单元具体用于：
    在第一反馈资源集合中的反馈资源上发送所述第一序列和第二序列；
    其中，所述第一反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源中第一资源对应的反馈资源。
  17. 如权利要求15所述的通信装置，其特征在于，所述指示信息为第三序列；所述第一发送单元具体用于：
    在第一反馈资源集合中的第一反馈资源上发送所述第三序列；其中所述第一反馈资源与用于承载所述第一序列或所述第二序列的反馈资源的频域重合，且所述第三序列的相位相对于所述第一序列的相位或所述第二序列相位偏移第一参考值；或者
    在所述第一反馈资源集合中的第二反馈资源上发送所述第三序列；其中所述第二反馈资源与用于承载所述第一序列或所述第二序列的反馈资源在所述第一反馈资源集合中相邻，所述第三序列的相位与所述第一序列的相位或所述第二序列的相位相同；
    其中，所述第一反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源中第一资源对应的反馈资源。
  18. 如权利要求15所述的通信装置，其特征在于，所述指示信息为第三序列，所述第一发送单元具体用于：
    在第二反馈资源集合中的反馈资源上发送所述第三序列；所述第三序列的索引满足：
    Figure PCTCN2020121690-appb-100003
    P ID为所述控制信息中承载的物理层源地址标识，M ID为所述指示信息的标识，
    Figure PCTCN2020121690-appb-100004
    为所述第二反馈资源集合中反馈资源可传输的序列数量；
    其中，所述第二反馈资源集合包括物理侧行反馈控制信道PSFCH占用的资源对应的比特位图中比特值为0的比特位对应的反馈资源。
  19. 一种通信装置，其特征在于，包括：
    发送单元，用于向第三终端发送控制信息，所述控制信息指示第一资源和第二资源，所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；
    接收单元，用于接收所述第三终端发送的第一指示信息；
    处理单元，用于对所述第二资源进行资源重选。
  20. 如权利要求19所述的通信装置，其特征在于，所述控制信息还包括资源重选触发信息，所述资源重选触发信息用于触发所述第三终端进行资源重选辅助。
  21. 如权利要求19所述的通信装置，其特征在于，所述第二接收单元具体用于：
    接收所述第三终端发送的第一序列和第二序列；其中所述第一序列用于传输所述第一资源对应的肯定应答响应ACK，所述第二序列用于传输所述第一资源对应的否定应答响应NACK；或者
    接收所述第三终端发送的第三序列；所述第三序列与所述第一序列和所述第二序列不同。
  22. 一种通信装置，其特征在于，包括：
    发送单元，用于向第三终端发送控制信息，所述控制信息指示第一资源和第二资源， 所述第一资源承载所述控制信息对应的第一数据，所述第二资源为所述第一终端预留的发送资源；
    处理单元，用于确定通过接收单元接收所述第一资源对应的否定应答响应NACK的次数大于预设阈值；对所述第二资源进行资源重选。
  23. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行如权利要求1～11中任一所述的方法。
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