WO2022027629A1 - 一种通信方法、装置及系统 - Google Patents

一种通信方法、装置及系统 Download PDF

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Publication number
WO2022027629A1
WO2022027629A1 PCT/CN2020/107924 CN2020107924W WO2022027629A1 WO 2022027629 A1 WO2022027629 A1 WO 2022027629A1 CN 2020107924 W CN2020107924 W CN 2020107924W WO 2022027629 A1 WO2022027629 A1 WO 2022027629A1
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WIPO (PCT)
Prior art keywords
time
resource
terminal device
information
selection window
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PCT/CN2020/107924
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English (en)
French (fr)
Inventor
郭文婷
苏宏家
董蕾
卢磊
Original Assignee
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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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20948330.4A priority Critical patent/EP4192158A4/en
Priority to PCT/CN2020/107924 priority patent/WO2022027629A1/zh
Priority to CN202080104173.1A priority patent/CN116326018A/zh
Priority to JP2023508586A priority patent/JP2023538290A/ja
Publication of WO2022027629A1 publication Critical patent/WO2022027629A1/zh
Priority to US18/165,769 priority patent/US20230180271A1/en

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    • 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
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink

Definitions

  • the present application relates to the field of mobile communication technologies, and in particular, to a communication method, device, and system.
  • the direct communication between the terminal device and the terminal device is called sideline communication.
  • the sender terminal device can send sidelink control information (SCI) and sideline data to the receiver terminal device.
  • the receiving end terminal device receives the SCI and receives and decodes the sideline data according to the SCI.
  • mode 1 mode 1
  • the base station allocates resources to the transmitting terminal device, that is, Mode-1 is a sidelink communication resource allocation method based on base station scheduling; another resource allocation mode is Mode 2 (Mode-2), in which Mode-2 is performed by the transmitting terminal device.
  • Self-selecting resources that is, Mode-2 does not require resource scheduling by the base station, but the terminal device autonomously determines the resources used for sideline communication.
  • the transmitting end terminal device triggers resource selection in time slot n, and acquires the listening result within the resource sensing window (sensing window) defined by the time slot as the time unit. According to the listening result, the terminal device at the transmitting end excludes the unavailable time-frequency resources in the resource selection window defined by the time slot as the time unit, that is, excludes the time-frequency resources that have been occupied and used for wireless communication, and obtains the resource selection
  • the time-frequency resources available in the window are determined, and the time-frequency resources used for sidelink communication are determined from these available time-frequency resources to send sidelink data.
  • Mode-2 mode when determining the time-frequency resources for sideline communication, the transmitting terminal device only considers the listening result of the transmitting terminal device, that is, only considers the wireless resource occupation around the transmitting terminal device. In this case, when the transmitting end terminal device transmits sideline data to the receiving end terminal device, reception of the sideline data by the receiving end terminal device may be interfered by wireless communication around the receiving end terminal device.
  • Mode 2b improves Mode-2.
  • the transmitting end terminal device does not only consider the listening result of the transmitting end terminal device when determining the time-frequency resources for sideline communication , and also consider the listening result of the terminal device at the receiving end, that is, the terminal device at the transmitting end should not only consider the occupancy of wireless resources around the terminal device at the sending end, but also the occupancy of wireless resources around the terminal device at the receiving end.
  • the end terminal device will send auxiliary information to the transmitting end terminal device, and the auxiliary information indicates the above-mentioned listening result of the receiving end terminal device to the transmitting end terminal device.
  • the timing at which the terminal device on the receiving end sends the auxiliary information is not limited, and the terminal device on the transmitting end may have missed the opportunity to send the sideline information when receiving the auxiliary information, resulting in a decrease in the reliability of the sideline communication.
  • Embodiments of the present application provide a communication method, device, and system, which are used to improve the reliability of sideline communication.
  • the auxiliary information is information used to assist the first terminal device in determining transmission resources for sideline information, and its timeliness is very important.
  • V2X communication the transmission of sideway information is often very timely to ensure that the vehicle can obtain the information of surrounding vehicles or pedestrians in time. If the auxiliary information is sent to the first terminal device, the first terminal device has missed sending the sideway information. timing, the auxiliary information has actually lost its effect, reducing the reliability of sideline communication. Therefore, the embodiment of the present application determines the first time, and transmitting the auxiliary information at or before the first time can ensure the timeliness of the auxiliary information and improve the reliability of the sideline communication.
  • a first aspect provides a communication method, comprising: determining a first time according to a first reference time and a first time offset; sending auxiliary information to a first terminal device at or before the first time , the auxiliary information is used to indicate a first resource, and the first resource is used to determine a second resource for receiving sideline information from the first terminal device; wherein the first reference time includes a second time, a first Three times, a fourth time or a fifth time, the second time includes the time when trigger information is received from the first terminal device, the trigger information is used to trigger the determination of the first resource, and the third time includes the start time of the resource selection window, the fourth time includes the end time of the resource selection window, the resource selection window is used to determine the second resource for receiving sideline information from the first terminal device, and the The fifth time includes the start time of the first resource in the time domain.
  • the second terminal device sends the auxiliary information to the first terminal device at or before the first time, and the first time is determined according to the first reference time and the first time offset, that is, the second terminal device sends the auxiliary information to the first terminal device.
  • the time for the terminal device to send the auxiliary information is limited to ensure that when the first terminal device receives the auxiliary information, the first terminal device has enough time to determine the second resource for sending the sideline information, thereby improving the sideline information. reliability of communication.
  • the first time offset is determined according to the capability of the first terminal device; or the first time offset is a predefined time offset.
  • the determination of the first time offset according to the capability of the first terminal device can improve the pertinence of the first time offset and set the offset more flexibly.
  • the second time offset is predefined, which reduces the system complexity.
  • the method further includes: receiving the trigger information from the first terminal device, where the trigger information includes a start time of the resource selection window and an end of the resource selection window time, the first time offset, the capability of the first terminal device, the second time offset, or at least one information of the time length of the resource selection window, the second time offset
  • the amount is the time offset between the time when the trigger information is received from the first terminal device and the start time of the resource selection window, and the second time offset is used to determine the start time of the resource selection window. start time, the second time offset and the time length of the resource selection window are used to determine the end time of the resource selection window.
  • the resource selection window is a resource selection window of the first terminal device.
  • the second terminal device can perform resource selection more targeted for the resource selection window of the first terminal device for determining the sideline information transmission resource, which improves the efficiency of the auxiliary information.
  • the method further includes: receiving control information from the first terminal device, sideline radio resource control PC5-RRC signaling or medium access control control unit MAC CE, the control information , the sideline radio resource control PC5-RRC signaling or the medium access control control element MAC CE is used to indicate the first time offset and/or the capability of the first terminal device.
  • the method further includes: receiving the sideline information from the first terminal device on the second resource.
  • the start time of the first resource in the time domain is within the resource selection window.
  • the first resource includes at least one resource, and the at least one resource is used to determine a resource for receiving sideline information from the first terminal device, and the first resource is in the time domain.
  • the start time includes the time domain start time of the first resource in the time domain of the at least one resource.
  • the unit of the first time and the first time offset is milliseconds or time slots.
  • a communication method comprising: determining a first time according to a first reference time and a first time offset; receiving assistance information from a second terminal device at or before the first time , the auxiliary information is used to indicate a first resource, and the first resource is used to determine a second resource for sending sideline information to the second terminal device; wherein the first reference time includes a second time, a second Three times, a fourth time, or a fifth time, the second time includes the time at which trigger information is sent to the second terminal device, where the trigger information is used to trigger the determination of the first resource, and the third time includes the start time of the resource selection window, the fourth time includes the end time of the resource selection window, the resource selection window is used to determine the second resource for sending sideline information to the second terminal device, and the The fifth time includes the start time of the first resource in the time domain.
  • the second terminal device sends the auxiliary information to the first terminal device at or before the first time, and the first time is determined according to the first reference time and the first time offset, that is, the second terminal device sends the auxiliary information to the first terminal device.
  • the time for the terminal device to send the auxiliary information is limited to ensure that when the first terminal device receives the auxiliary information, the first terminal device has enough time to determine the second resource for sending the sideline information, thereby improving the sideline information. reliability of communication.
  • the first time offset is determined according to the capability of the first terminal device; or the first time offset is a predefined time offset.
  • the determination of the first time offset according to the capability of the first terminal device can improve the pertinence of the first time offset and set the offset more flexibly.
  • the second time offset is predefined, which reduces the system complexity.
  • the method further includes: sending the trigger information to the second terminal device, where the trigger information includes a start time of the resource selection window and an end time of the resource selection window , the first time offset, the capability of the first terminal device, the second time offset, or at least one information of the time length of the resource selection window, the second time offset is the time offset between the time when the second terminal device sends the trigger information and the start time of the resource selection window, where the second time offset is used to determine the start time of the resource selection window, The second time offset and the time length of the resource selection window are used to determine the end time of the resource selection window.
  • the resource selection window is a resource selection window of the first terminal device.
  • the second terminal device can perform resource selection more targeted for the resource selection window of the first terminal device for determining the sideline information transmission resource, which improves the efficiency of the auxiliary information.
  • the method further includes: sending control information, sideline radio resource control PC5-RRC signaling or medium access control control unit MAC CE to the second terminal device, the control information,
  • the sideline radio resource control PC5-RRC signaling or the medium access control control unit MAC CE is used to indicate the first time offset and/or the capability of the first terminal device.
  • the method further includes: sending the sideline information to the second terminal device on the second resource.
  • the start time of the first resource in the time domain is within the resource selection window.
  • the first resource includes at least one resource
  • the at least one resource is used to determine a resource for sending sideline information to the second terminal device, and the first resource is in the time domain.
  • the start time includes the time domain start time of the first resource in the time domain of the at least one resource.
  • the unit of the first time and the first time offset is milliseconds or time slots.
  • a second terminal device including: a processing module configured to determine a first time according to a first reference time and a first time offset; Sending auxiliary information to the first terminal device before the first time, where the auxiliary information is used to indicate a first resource, and the first resource is used to determine a second resource for receiving sideline information from the first terminal device; wherein, The first reference time includes a second time, a third time, a fourth time or a fifth time, the second time includes a time when trigger information is received from the first terminal device, the trigger information is used for triggering determination the first resource, the third time includes the start time of the resource selection window, the fourth time includes the end time of the resource selection window, the resource selection window is used to determine the The second resource of sideline information is received, and the fifth time includes the start time of the first resource in the time domain.
  • the second terminal device sends the auxiliary information to the first terminal device at or before the first time, and the first time is determined according to the first reference time and the first time offset, that is, the second terminal device sends the auxiliary information to the first terminal device.
  • the time for the terminal device to send the auxiliary information is limited to ensure that when the first terminal device receives the auxiliary information, the first terminal device has enough time to determine the second resource for sending the sideline information, thereby improving the sideline information. reliability of communication.
  • the first time offset is determined according to the capability of the first terminal device; or the first time offset is a predefined time offset.
  • the determination of the first time offset according to the capability of the first terminal device can improve the pertinence of the first time offset and set the offset more flexibly.
  • the second time offset is predefined, which reduces the system complexity.
  • the transceiver module is further configured to receive the trigger information from the first terminal device, where the trigger information includes the start time of the resource selection window, the resource selection window end time, the first time offset, the capability of the first terminal device, the second time offset, or at least one information of the time length of the resource selection window, the second time
  • the offset is the time offset between the time when the trigger information is received from the first terminal device and the start time of the resource selection window, and the second time offset is used to determine the resource selection window
  • the start time of the resource selection window, the second time offset and the time length of the resource selection window are used to determine the end time of the resource selection window.
  • the resource selection window is a resource selection window of the first terminal device.
  • the second terminal device can perform resource selection more targeted for the resource selection window of the first terminal device for determining the sideline information transmission resource, which improves the efficiency of the auxiliary information.
  • the transceiver module is further configured to receive control information from the first terminal device, sideline radio resource control PC5-RRC signaling or medium access control control unit MAC CE, the The control information, the sideline radio resource control PC5-RRC signaling or the medium access control control element MAC CE is used to indicate the first time offset and/or the capability of the first terminal device.
  • the transceiver module is further configured to receive the sideline information from the first terminal device on the second resource.
  • the start time of the first resource in the time domain is within the resource selection window.
  • the first resource includes at least one resource, and the at least one resource is used to determine a resource for receiving sideline information from the first terminal device, and the first resource is in the time domain.
  • the start time includes the time domain start time of the first resource in the time domain of the at least one resource.
  • the unit of the first time and the first time offset is milliseconds or time slots.
  • a first terminal device comprising: a processing module for determining a first time according to a first reference time and a first time offset; a transceiver module for determining a first time at the first time or the receiving auxiliary information from a second terminal device before a first time, the auxiliary information being used to indicate a first resource, the first resource being used to determine a second resource for sending sideline information to the second terminal device; wherein,
  • the first reference time includes a second time, a third time, a fourth time, or a fifth time, and the second time includes a time at which trigger information is sent to the second terminal device, where the trigger information is used to trigger determination the first resource, the third time includes the start time of the resource selection window, the fourth time includes the end time of the resource selection window, and the resource selection window is used to determine the second terminal device
  • the second resource of sideline information is sent, and the fifth time includes the start time of the first resource in the time domain.
  • the second terminal device sends the auxiliary information to the first terminal device at or before the first time, and the first time is determined according to the first reference time and the first time offset, that is, the second terminal device sends the auxiliary information to the first terminal device.
  • the time for the terminal device to send the auxiliary information is limited to ensure that when the first terminal device receives the auxiliary information, the first terminal device has enough time to determine the second resource for sending the sideline information, thereby improving the sideline information. reliability of communication.
  • the first time offset is determined according to the capability of the first terminal device; or the first time offset is a predefined time offset.
  • the determination of the first time offset according to the capability of the first terminal device can improve the pertinence of the first time offset and set the offset more flexibly.
  • the second time offset is predefined, which reduces the system complexity.
  • the transceiver module is further configured to send the trigger information to the second terminal device, where the trigger information includes the start time of the resource selection window, and the start time of the resource selection window.
  • the trigger information includes the start time of the resource selection window, and the start time of the resource selection window.
  • the second time offset is the time offset between the time when the trigger information is sent to the second terminal device and the start time of the resource selection window
  • the second time offset is used to determine the start of the resource selection window time
  • the second time offset and the time length of the resource selection window are used to determine the end time of the resource selection window.
  • the resource selection window is a resource selection window of the first terminal device.
  • the second terminal device can perform resource selection more targeted for the resource selection window of the first terminal device for determining the sideline information transmission resource, which improves the efficiency of the auxiliary information.
  • the transceiver module is further configured to send control information, sideline radio resource control PC5-RRC signaling or a medium access control control unit MAC CE to the second terminal device, and the control
  • the information, the sideline radio resource control PC5-RRC signaling or the medium access control control element MAC CE is used to indicate the first time offset and/or the capability of the first terminal device.
  • the transceiver module is further configured to send the sideline information to the second terminal device on the second resource.
  • the start time of the first resource in the time domain is within the resource selection window.
  • the first resource includes at least one resource
  • the at least one resource is used to determine a resource for sending sideline information to the second terminal device, and the first resource is in the time domain.
  • the start time includes the time domain start time of the first resource in the time domain of the at least one resource.
  • the unit of the first time and the first time offset is milliseconds or time slots.
  • a terminal device comprising a processor, the processor is coupled to at least one memory, and the processor is configured to read a computer program stored in the at least one memory to execute any one of the first aspects.
  • a communication device in a sixth aspect, includes a processor and a communication interface that can be used to communicate with other devices.
  • the communication device may further include a memory for storing computer instructions.
  • the processor and the memory are coupled to each other for implementing the method described in the first aspect or the second aspect or various possible implementation manners.
  • the first communication device may not include the memory, and the memory may be provided outside the communication device.
  • the processor, the memory and the communication interface are coupled to each other for implementing the method described in the various possible implementation manners of the first aspect or the second aspect.
  • the communication device is caused to perform the method in any possible implementation manner of the first aspect or the second aspect.
  • the first communication device is a communication device, or a chip or other component provided in the communication device.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer is made to execute any one of the first aspect The method, or causing the computer to execute the method according to any one of the second aspects.
  • a chip or a system-on-a-chip comprising a processor and a communication interface, the processor is configured to read instructions to execute the method as described in any one of the first aspects, or to execute any of the methods as described in the second aspect. one of the methods described.
  • the chip or the system-on-chip may further include a memory, for example, the processor may read and execute a software program stored in the memory, so as to implement the method provided by any possible design of the first aspect or the second aspect.
  • the memory may not be included in the chip, but is located outside the chip, which is equivalent to that the processor may read and execute the software program stored in the external memory, so as to realize the above-mentioned first aspect or The method provided by any one of the possible designs in the second aspect.
  • a ninth aspect provides a computer program product comprising instructions, the computer program product is used to store a computer program, when the computer program runs on a computer, the computer is made to execute any of the first aspect or the second aspect.
  • a communication system including the terminal device according to any one of the third aspects, and the terminal device according to any one of the fourth aspects.
  • FIG. 1 is a schematic diagram of several application scenarios of V2X
  • FIG. 2 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a sideline information transmission resource allocation mode of Mode-2;
  • FIG. 4 is a schematic diagram of a V2X communication scenario provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a V2X communication scenario provided by an embodiment of the present application.
  • FIG. 6 is a flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a first terminal device provided by an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a second terminal device provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a first reference time provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a specific example of a communication method provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a simplified terminal device provided by an embodiment of the present application.
  • V2X technology is a technology for vehicles to communicate with the outside world, which is the basis and key technology of smart cars, autonomous driving, and intelligent transportation systems.
  • V2X specifically includes vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I) and/or vehicle-to-pedestrian (V2P) direct communication, as well as vehicle-to-vehicle (V2P) direct communication.
  • V2V vehicle-to-vehicle
  • V2I vehicle-to-infrastructure
  • V2P vehicle-to-pedestrian
  • V2P vehicle-to-pedestrian
  • 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 infrastructure, such as RSU, and other
  • V2N refers to the communication between the vehicle and the base station/network.
  • V2P can be used as a safety warning for pedestrians or non-motor vehicles on the road.
  • vehicles can communicate with roads and even other infrastructure, such as traffic lights, roadblocks, etc., to obtain road management information such as traffic light signal timing.
  • V2V can be used for inter-vehicle information interaction and reminders, and the most typical application is for inter-vehicle anti-collision safety systems.
  • V2N is the most widely used form of Internet of Vehicles at present. Its main function is to connect the vehicle to the cloud server through the mobile network, and use the application functions such as navigation, entertainment, or anti-theft provided by the cloud server.
  • the embodiments of the present application take V2X communication as an example for description, but the embodiments of the present application can also be applied to device-to-device (Device to Device, D2D) communication, machine type communication (Machine Type Communication, MTC), or Internet of Things (Internet of Things) , IoT) communication, etc.
  • D2D Device to Device
  • MTC Machine Type Communication
  • IoT Internet of Things
  • FIG. 2 includes a network device and two terminal devices, namely, a terminal device 1 and a terminal device 2 . Both of the two terminal devices may be within the coverage of the network device; or of the two terminal devices, only the terminal device 1 may be within the coverage of the network device, and the terminal device 2 may not be within the coverage of the network device; Or neither of the two terminal devices is within the coverage of the network device. Communication between the two end devices is possible via a sidelink.
  • FIG. 2 takes as an example that the terminal device 1 is in the coverage area of the network device and the terminal device 2 is not in the coverage area of the network device.
  • the number of terminal devices in FIG. 2 is just an example. In practical applications, a network device may provide services for multiple terminal devices.
  • the network device in FIG. 2 is, for example, an access network device, such as a base station.
  • the access network device corresponds to different devices in different systems, for example, the 5G system corresponds to an access network device in 5G, such as a gNB, or an access network device in a subsequently evolved communication system.
  • the terminal device in FIG. 2 is a vehicle-mounted terminal device or a car as an example, but the terminal device in the embodiment of the present application is not limited to this.
  • Terminal devices including terminal equipment, may also include units, modules, modules, chips or chip systems built into the terminal equipment.
  • a module, chip or chip system can be provided in the terminal device.
  • the terminal device may communicate with the core network via a radio access network (RAN), exchanging voice and/or data with the RAN.
  • RAN radio access network
  • the terminal device may include user equipment (UE), wireless terminal device, mobile terminal device, device-to-device (D2D) communication terminal device, vehicle to everything (V2X) End devices, machine-to-machine/machine-type communications (M2M/MTC) end devices, Internet of things (Internet of things, IoT) end devices, etc.
  • UE user equipment
  • D2D device-to-device
  • V2X vehicle to everything
  • M2M/MTC machine-to-machine/machine-type communications
  • IoT Internet of things
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices. Helmets, jewelry, clothing and shoes, etc.
  • a wearable device is a portable device that is worn on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • the terminal devices described above if they are located on the vehicle (eg, placed in the vehicle or installed in the vehicle), can be regarded as the on-board terminal device, for example, the on-board terminal device is also called an on-board unit (OBU).
  • OBU on-board unit
  • a network device including a radio access network (RAN) device, such as a base station or an access point, may refer to a device in a radio access network that communicates with a terminal device through one or more cells over the air interface,
  • RAN radio access network
  • the network device in the vehicle-to-everything (V2X) technology is a road side unit (RSU), and the RSU may be a fixed infrastructure entity supporting V2X applications, and may be connected with a network device supporting V2X applications.
  • RSU road side unit
  • Other entities exchange messages.
  • the network device may include a node B (next generation node B, gNB) in the fifth generation mobile communication technology (the 5th generation, 5G) new radio (new radio, NR) system (also referred to as NR system for short), or may also include Centralized unit (CU) and distributed unit (DU) in cloud radio access network (Cloud RAN) system.
  • gNB node B
  • 5G fifth generation mobile communication technology
  • NR new radio
  • NR system also referred to as NR system for short
  • CU Centralized unit
  • DU distributed unit
  • Cloud RAN cloud radio access network
  • the network device may further include a core network device, for example, the core network device includes an access and mobility management function (AMF) or a user plane function (UPF), and the like.
  • AMF access and mobility management function
  • UPF user plane function
  • the device for implementing the function of the network device may also be a device capable of supporting the network device to realize the function, such as a unit, module, module, chip or chip system, the unit, module, module, chip Or a system-on-a-chip can be installed in a network device.
  • Mode-1 resource allocation modes
  • Mode-2 resource allocation modes for resources used by the terminal device at the transmitting end for sideline information transmission.
  • Mode-1 sideline information transmission resource allocation method :
  • Mode-1 is mainly used in V2X communication under the situation of network coverage, and the network device performs allocation of sideline information transmission resources.
  • Mode-1 may further include a dynamic grant (DG) mode and a preconfigured grant (CG) mode.
  • DG dynamic grant
  • CG preconfigured grant
  • the base station will schedule transmission resources for sending sideline information to the receiving terminal device by the transmitting terminal device through downlink control information (downlink control information, DCI).
  • DCI downlink control information
  • the base station will configure the transmission resources of the related sideline information through high-layer signaling, such as radio resource control (radio resource control, RRC) signaling.
  • RRC radio resource control
  • Mode-2 sideline information transmission resource allocation method :
  • Mode-2 the determination of the sideline information transmission resource by the terminal device at the transmitting end does not depend on the base station.
  • This mode is not limited by network coverage, and the sender terminal device can also use this mode to communicate without network coverage.
  • the terminal device on the transmitting end will continue to monitor the radio resources.
  • the terminal device on the transmitting end learns in time slot n that the sideline information to be sent is to be sent
  • the terminal device on the transmitting end will The listening result in the resource listening window [nt 0 , nt proc, 0 ) will be obtained, that is, the listening result obtained by the transmitting terminal device before the time slot n listening to the wireless resources in the listening window result.
  • the listening result can reflect the occupancy of resources, which can be determined according to the measured signal strength, or decode the detected sideline control information sent by other terminal devices to obtain the sideline control information of other terminal devices. It is determined by the sending of information.
  • t 0 is the boundary value of the resource listening window, for example, t 0 may be 1100ms or 100ms, or may be other values.
  • t proc,0 is the time for the terminal device at the transmitting end to process the interception result. The value of t proc,0 varies according to the capabilities of the terminal device, and t proc,0 ⁇ 0.
  • the terminal device at the transmitting end excludes the unavailable time-frequency resources within the resource selection window [n+t 1 , n+t 2 ] according to the listening result, that is, the time-frequency resources already occupied by other terminal devices for information transmission resources, and then the terminal device at the sending end determines the resources that can be used for sideline information transmission.
  • 0 ⁇ t 1 ⁇ t proc,1 , t proc,1 is the time for the terminal device to process the interception result, and the value of t proc,1 varies according to the different capabilities of the terminal device. different.
  • PDB is the maximum delay time required for a data packet to be successfully sent from being generated at the service layer.
  • the remaining PDB is the delay time remaining after time n from the time when the data packet service layer is generated.
  • the unit of the PDB may be a time slot, a subframe or a frame, or it may also be an absolute time, for example, the unit is milliseconds or seconds.
  • the specific resource selection method of the transmitting terminal device is introduced as follows:
  • the transmitting end terminal device receives SCIs from other terminal devices in the resource pool within the resource listening window [nt 0 , nt proc, 0 ), and the other terminal devices may include at least one terminal device around the transmitting end terminal device, such as including Terminal device 1. Further, the SCI is a 1st-stage SCI (1st-stage SCI), which is sent on a physical sidelink control channel (PSCCH).
  • the SCI includes time-frequency resource information for transmitting sideline information by other terminal devices, period information for transmitting sideline information information, and/or priority information for sideline information, and the like.
  • the resource pool that is, the sideline communication resource pool, is a set of time-frequency resources used to transmit sideline control information and/or data information. Discontinuous time slots, in which subchannels are several consecutive physical resource blocks (PRBs) in the frequency domain.
  • PRBs physical resource blocks
  • the terminal device at the sending end learns according to the SCI received from the terminal device 1, the transmission resource of the sideline information to be sent by the terminal device 1 is located in the resource selection window of the terminal device at the sending end [n+t 1 , n+t 2 ] ], the terminal device at the transmitting end determines which resources in the resource selection window have been reserved by the terminal device 1 according to the SCI, and the resources will be excluded in the subsequent resource selection process.
  • the transmitting terminal device After excluding time-frequency resources or unavailable resources occupied by other terminal devices in the resource selection window, the transmitting terminal device can determine that the remaining resources in the resource selection window are available time-frequency resources. Therefore, the terminal device at the transmitting end selects the time-frequency resources from the available time-frequency resources for the transmission of the sideline information.
  • the time-frequency resource used by the transmitting terminal device when sending data is determined based on the listening result of the transmitting terminal device in the resource listening window [nt 0 , nt proc,0 ).
  • the terminal device at the transmitting end does not know the channel conditions or resource occupation conditions around the terminal device at the receiving end. If there are other terminal devices communicating around the receiving terminal device, but the transmitting terminal device does not hear it, then for the receiving terminal device, when receiving data from the transmitting terminal device, it may be affected by other terminal devices.
  • the strong interference caused by the sideline communication of the terminal device causes the signal reception quality of the terminal device at the receiving end to be poor, and may even fail to receive.
  • UE1 selects time-frequency resources according to the listening result of UE1 to send data to UE2. Since UE3 and UE4 are far away from UE1, when UE1 listens, it will consider that there is no other terminal device around UE1 for sideline communication, and UE1 sends data to UE2. However, UE3 is actually sending data to UE4. Since UE3 and UE2 are close to each other, when the resources used by UE1 to send data to UE2 overlap or are the same as those used by UE3 to send data to UE4, UE3 sends data to UE4, and UE2 receives data from UE1. In terms of data, it causes strong interference, so that UE2 cannot correctly receive data from UE1, which reduces the reliability of sideline communication.
  • UE1 listens and can hear that UE3 sends data to UE4, then UE1 thinks that it cannot send data to UE2 through the time-frequency resources used by UE3 to send data to UE4, that is, UE1 confirms the time-frequency resources used by UE3 to send data to UE4. is an unavailable time-frequency resource.
  • UE4 has little interference to UE1, and UE3 sending data to UE4 will not affect UE2 receiving data from UE1. This is a situation of excessive resource exclusion for the UE1, and some resources that should be available will be considered as unavailable time-frequency resources, resulting in a reduction of the time-frequency resources available to the UE1.
  • the sideline information transmission resource allocation method of Mode-2b is improved on the sideline information transmission resource allocation method of Mode-2. It is necessary to consider the result of resource interception by the transmitting terminal device, and the result of resource interception by the receiving end terminal device.
  • the receiving end terminal device will listen to the terminal devices around the receiving end terminal device. Detecting, that is, detecting the SCI sent by the terminal devices around the receiving-end terminal device, so that the receiving-end terminal device determines the available or unavailable sideline information transmission resources for the receiving-end terminal device, and sends the information to the transmitting-end terminal device by sending the SCI.
  • the terminal device at the receiving end is notified of the available or unavailable sideline information transmission resources.
  • the receiving end terminal device will determine, according to the available or unusable sideline information determined by the receiving end terminal device itself and the available or unavailable sideline information determined by the receiving end terminal device, which is finally used to send the sideline to the receiving end terminal device resource of information.
  • FIG. 6 provides a communication method according to an embodiment of the present application, which may specifically be a method for transmitting auxiliary information, and further provides a first terminal device, a second terminal device, and a system.
  • the device involved in the embodiment of FIG. 6 is first introduced below.
  • the first terminal device in FIG. 6 includes a processing unit 71 and a transceiving unit 72, wherein the transceiving unit 72 can be replaced by a transmitting unit when sending a signal, and the transceiving unit 72 can be replaced by a receiving unit when receiving a signal .
  • the 6 includes a processing unit 81 and a transceiving unit 82 , wherein the transceiving unit 82 can be replaced by a transmitting unit when sending a signal, and the transceiving unit 82 can be replaced by a receiving unit when receiving a signal .
  • the processing unit 71 and the processing unit 81 may be processors, the transceiver unit 72 or the transceiver unit 82 may be transceivers, and the transceiver unit 72 or
  • the sending unit may be a transmitter
  • the transceiver unit 72 or the transceiver unit 82 is replaced by a receiving unit
  • the receiving unit may be a receiver, wherein the transceiver, transmitter or receiver may be a radio frequency circuit
  • the first terminal or the second terminal device may also include a storage unit or a computer-readable storage medium, of course, the storage unit or the computer-readable storage medium may also be set outside the first terminal or the second terminal device, for example, the storage unit Or a computer-readable storage medium is provided outside the vehicle-mounted module or module, and is communicatively connected to the first terminal or the second terminal device, the storage unit
  • the processing unit 71 or the processing unit 81 may be, for example, a processor, and the transceiver unit 72 or the transceiver unit 82 may be an output interface, a pin or a circuit, etc.
  • the transceiver unit 72 or the transceiver unit 82 may also be an input interface, a pin or a circuit, and the transceiver unit 72 or the transceiver unit 82 may be an input/output interface, a pin or a circuit, and the like.
  • the processing unit 71 or the processing unit 81 can execute computer instructions, so that the first terminal device or the second terminal device executes the method involved in FIG. 6 .
  • this computer instruction is stored in a storage unit or a computer-readable storage medium
  • the storage unit or computer-readable storage medium may be a storage unit in the chip, such as a register, a cache, etc.
  • the storage unit or The computer-readable storage medium may also be a terminal device or a user device or a storage unit located outside the chip in a vehicle, such as a read-only memory (Read Only Memory, ROM) or other types of static storage that can store static information and instructions equipment, random access memory (Random Access Memory, RAM), etc.
  • ROM read-only memory
  • RAM random access memory
  • a method for transmitting auxiliary information includes:
  • Step S60 the transceiver unit 72 of the first terminal device sends trigger information to the second terminal device, and the transceiver unit 82 of the second terminal device receives the trigger information from the first terminal device.
  • the trigger information is a kind of control information used to trigger the second terminal device to determine the first resource, and the first resource will be used by the first terminal device to determine the resource for sending sideline information to the second terminal device.
  • step S60 is not a necessary step, and the mode-2b determination method of sideline information transmission resources includes trigger type and non-trigger type.
  • the trigger type the first terminal device will send trigger information to the second terminal device for triggering
  • the second terminal device transmits auxiliary information to the first terminal device.
  • the second terminal device After receiving the trigger information, the second terminal device selects resources based on the listening result, that is, the second terminal device selects resources in the resource selection window according to the listening results and reservation information in the listening window to determine the first Resource, this resource selection window can be the resource selection window of the first terminal device indicated by the first terminal device to the second terminal device, to inform the second terminal device that the first terminal device will perform resource selection determination in this resource selection window A resource used for sideline information transmission, whereby the second terminal device can select the first resource in this resource selection window to assist the first terminal device according to the listening result of the second terminal device in the listening window and the reservation information Determine the resource for sending the sideline information, wherein the reservation information is carried in the sideline control information of the other terminal device received by the second terminal device, and is used to instruct the other terminal device to periodically transmit the period information of the sideline information .
  • the second terminal device carries the resource selection result of the second terminal device, that is, the first resource, in the auxiliary information. Then, the first terminal device will determine the resources used by the first terminal device to send the sideline information to the second terminal device according to the resource selection result of the first terminal device itself and the resource selection result of the second terminal device carried in the auxiliary information.
  • the first terminal device will not send trigger information to the second terminal device.
  • the second terminal device will periodically or aperiodically perform resource monitoring, and select resources according to the monitoring result and the reservation information.
  • the resource selection window is performed in the window, and then the resource selection result is notified to the first terminal device through auxiliary information.
  • the resource selection window can be the resource selection window of the second terminal device or a predefined resource selection window. In the non-triggered type, step S60 does not necessarily exist.
  • step S61 the processing unit 71 of the first terminal device determines the first time according to the first reference time and the first time offset, and the processing unit 81 of the second terminal device also determines the first time according to the first reference time and the first time offset. Determine the first time. Although both the first terminal device and the second terminal device determine the first time in step 61, the first terminal device determines the first time and the second terminal device determines that the first time has no time The order of precedence is limited. The first time is subsequently used to determine the sending time for the second terminal device to send the auxiliary information to the first terminal device.
  • the first reference time is a time reference point, that is, the time limit for sending the auxiliary information, that is, the first time, can be determined according to the time reference point and the first time offset, and this time limit may also be referred to as a delay boundary.
  • the unit of measurement of the first reference time and the first time offset may be seconds or milliseconds, and certainly may be time slots or symbols.
  • the prior art does not specify the time for the second terminal device to send the auxiliary information to the first terminal device, which may cause the first terminal device to miss the opportunity to send the sideline information when receiving the auxiliary information, reducing the reliability. Due to time constraints, the second terminal device must send auxiliary information to the first terminal device at or before the first time, which can improve reliability.
  • step 61 the determination of the first time needs to be determined according to two factors, one factor is the first reference time, and the other factor is the first time offset.
  • the first reference time may include four kinds of reference times, which are the second time, the third time, the fourth time or the fifth time, respectively.
  • the second time includes the time when trigger information is received from the first terminal device, the trigger information being used to trigger the determination of the first resource. That is, the second time is the time when the first terminal device sends the trigger information to the second terminal device in step S60, and is also the time when the second terminal device receives the trigger information from the first terminal device. At this time, the first terminal device or the second terminal device will determine the first time according to the second time, that is, according to the sending or receiving time of the trigger information, and the first time offset. It can be seen from FIG.
  • the first time offset is the time difference between the second time and the first time, that is, the first time when the second terminal device sends the auxiliary information is the transmission time of the trigger information as the reference time point, obtained by offsetting the first time offset, whereby the second terminal device knows the second time after receiving the trigger information, and determines the latest time for feeding back the auxiliary information according to the first time offset, which is immediately At this time, the delay bound of the feedback auxiliary information is an offset relative to the triggering auxiliary information, the processing process is simple, and the system complexity is reduced.
  • the third time includes the start time of a resource selection window used to determine the second resource for receiving sideline information from the first terminal device, that is, the resource selection window is used by the first terminal device to
  • the second terminal device sends the second resource of the sideline information.
  • the resource selection window is a resource selection window of the first terminal device, that is, the first terminal device will determine a resource for transmitting sideline information in this resource selection window, and this resource selection window will be indicated by the first terminal device to the first terminal device.
  • Two terminal devices, for the second terminal device to determine the first resource in the resource selection window, and the first resource will be indicated to the first resource through the auxiliary information sent by the second terminal device to the first terminal device terminal device. As can be seen from FIG.
  • the first time offset is the time difference between the third time and the first time, that is, the first time takes the start time of the resource selection window as the reference time point, and offsets the first time.
  • the first terminal device and the second terminal device associate the start time of the resource selection window with the expected first time offset to determine the first time, and use the third time as the At the first reference time, the finally determined first time is usually closer to the third time in the time domain, which can save the number of bits for transmitting the first time offset, and is suitable for sending auxiliary information in triggered and non-triggered scenarios.
  • the definition of the delay boundary, as long as there is a resource selection window, the third time can be used as the time reference point, which is more practical.
  • the fourth time includes the end time of the resource selection window, and the resource selection window is consistent with the resource selection window described in the example in which the third time is used as the first reference time, and details are not repeated here.
  • the first time offset is the time difference between the fourth time and the first time, that is, the first time when the second terminal device sends the auxiliary information takes the end time of the resource selection window as the reference time point.
  • the first terminal device and the second terminal device associate the end time of the resource selection window with the expected first time offset, which can ensure the first
  • a time offset must be a positive number, which reduces the complexity of implementation, and is suitable for the definition of the delay boundary of auxiliary information transmission in triggered and non-triggered scenarios.
  • the fourth time can be used as the time reference point .
  • the above-mentioned resource selection window may be the resource selection window of the first terminal device, that is, a period of time determined by the first terminal device according to the delay requirement of the data to be transmitted on the sidelink for selecting the sideline information transmission resource, the first The terminal device will determine the transmission resource for transmitting the sideline information to be transmitted within the resource selection window.
  • the case where the first reference time is the second time may correspond to the triggered sideline information transmission resource determination method in Mode-2b, and the case where the first reference time is the third time or the fourth time may correspond to the triggering method in Mode-2b or Non-triggered sideline information transmission resource determination method.
  • the triggering information will include some information, and the information includes the start time of the resource selection window, the end time of the resource selection window, the first time offset offset, the capability of the first terminal device or the second terminal device, a second time offset, or at least one information of the time length of the resource selection window, the second time offset is from a time offset between the time when the first terminal device receives the trigger information and the start time of the resource selection window, the second time offset is used to determine the start time of the resource selection window, The second time offset and the time length of the resource selection window are used to determine the end time of the resource selection window.
  • the start time of the resource selection window may be based on the time when the second terminal receives the trigger information from the first terminal device and the second time offset If the shift amount is determined, the end time of the resource selection window may be determined according to the time when the second terminal receives the trigger information from the first terminal device, the second time offset, and the time length of the resource selection window.
  • some of the information described above may be indicated by the network device to the first terminal device and/or the second terminal device through control information.
  • the transceiver unit 72 of the first terminal device may also send control information, sideline radio resource control (PC5-Radio Resource Control, PC5-RRC) signaling or a media access control control unit (Media Access Control Unit) to the second terminal device.
  • PC5-Radio Resource Control PC5-RRC
  • Media Access Control Unit Media Access Control Unit
  • the transceiver unit 82 of the second terminal device receives the control information, the PC5-RRC signaling or the MAC CE from the first terminal device.
  • the control information, the PC5-RRC signaling or the MAC CE may be used to indicate the start time of the resource selection window, the end time of the resource selection window, the first time offset, the first terminal At least one of the capability of the device or the second terminal device, the second time offset, or the time length of the resource selection window.
  • the fifth time includes the start time of the first resource in the time domain.
  • the case where the first reference time is the fifth time may correspond to the triggered or non-triggered sideline information transmission resource determination method in Mode-2b.
  • the second terminal device will listen to the surrounding channel environment.
  • the second terminal device may receive information from the second terminal device.
  • the sideline control information sent by the surrounding terminal devices can be used to know which resources the terminal devices around the second terminal device transmit the sideline information on, or the second terminal device can also measure the signal strength of the wireless resources, thereby , the second terminal device can determine which resources around the second terminal device are available or unavailable, and inform the first terminal device of the available resources or unavailable resources in the auxiliary information, and the available resources obtained by the second terminal device Or the unavailable resource is the first resource.
  • the second terminal device will also regularly or irregularly monitor the surrounding channel environment without receiving the trigger information from the first terminal device.
  • the second terminal device may Receive the sideline control information sent from the terminal devices around the second terminal device, so as to know on which resources the terminal devices around the second terminal device transmit the sideline information, or the second terminal device can also signal the radio resources.
  • Strength measurement whereby the second terminal device can determine which resources around the second terminal device are available or unavailable, and inform the first terminal device of the available resources or unavailable resources in the auxiliary information, and the second terminal device can The available resource or the unavailable resource acquired by the terminal device is the first resource.
  • the first resource is located in the resource selection window.
  • the first terminal device may further indicate to the second terminal device which time from the second time to the fifth time the first reference time is through trigger information or other sideline control information. That is, when the first reference time may be multiple possible times, the first terminal device may inform the second terminal device which reference time to use as the first reference time through trigger information or other sideline control information.
  • the first resource includes at least one resource, and the at least one resource is used to determine a resource for receiving sideline information from the first terminal device, and the start time of the first resource in the time domain includes one of the at least one resource.
  • the time domain start time of the first resource in the time domain.
  • the first resource is a continuous resource in the time domain.
  • the first resource may also be a set of multiple resources, that is, the first resource includes multiple discontinuous resources in the time domain.
  • the fifth time is the earliest time in the time domain of the available resource or the unavailable resource determined by the second terminal device, that is, the start time. It can be seen from FIG.
  • the first time offset is the time difference between the fifth time and the first time, that is, the first time when the second terminal device sends the auxiliary information is the start of the first resource in the time domain
  • the time is a reference time point and is obtained by offsetting the first time offset.
  • the first time offset may be determined according to the capability of the first terminal device or the second terminal device, that is, the first time when the second terminal device sends the auxiliary information needs to consider the first terminal device or the second terminal device. For example, when the capability of the first terminal device or the second terminal device is greater, that is, when the processing speed or the calculation speed is fast, the value of the first time offset may be smaller.
  • the capability of the first terminal device or the second terminal device may be carried by the trigger information, thereby improving the flexibility of the first time determination.
  • the first terminal device has enough time to perform scheduling and sideline information encoding and transmission after receiving the auxiliary information, so as to avoid waste of auxiliary information due to insufficient capability of the first terminal device, and to ensure the safety of the first terminal device.
  • Sideline information can be sent in a timely manner.
  • the first time offset may also be determined according to at least one of the following times:
  • the first terminal device may also receive auxiliary information sent by at least one other terminal device.
  • the first terminal device needs to receive the auxiliary information sent by the second terminal device and the at least one other At least one resource indicated in the auxiliary information sent by the terminal device and used for determining the resource for sending the sideline information by the first terminal device performs resource combination.
  • This resource combination requires a certain time. Therefore, the first time offset can be based on this resource. The time required to merge is determined.
  • the MAC layer decides the final resource selection result. That is, when the MAC layer receives the resource combination result in 2), the MAC layer will determine the resource finally used for the first terminal device to send the sideline information in the resource combination result, which takes a certain time. Therefore, the first time offset The amount can be determined based on the time at which the MAC layer decides the final resource selection result.
  • the first terminal device determines or acquires the resources to be used for the transmission of the sideline information, it needs to perform operations such as encoding and mapping the sideline information to be sent, that is, the preparation time for the transmission of the sideline information. Therefore, the first time offset is The amount may be determined based on the transmission preparation time of the sideline information.
  • At least one of the above times may be carried by the trigger information, thereby improving the flexibility of determining the first time.
  • the first time offset may also be a predefined time offset, that is, the specific value of the first time offset is specified by the protocol.
  • the specific value of the first time offset may be stored in the first terminal.
  • the memory of the device or the second terminal device is retrieved by the first terminal device or the second terminal device when the first time needs to be determined.
  • the protocol specifies the specific value of the first time offset, which reduces the complexity of the system.
  • the value of the first time offset may be n, where n is a negative integer, 0, or a positive integer, and the unit of measurement of the first time offset may be seconds or milliseconds, and certainly may be time slots or symbols.
  • Step S62 the transceiver unit 82 of the second terminal device sends auxiliary information to the first terminal device at the first time or before the first time, and the transceiver unit 72 of the first terminal device at the first time or the first time.
  • Auxiliary information is received from a first terminal device before a first time, the auxiliary information is used to indicate a first resource, the first resource is used to determine a second resource for receiving sideline information from the first terminal device.
  • the auxiliary information may include a bit map, which is used to indicate the first resource. For example, if a certain bit in the bit string of the bit map is 1, it indicates that the resource corresponding to this bit can be used for the transmission of sideline information. .
  • a possible scenario is that the first terminal device cannot monitor radio resources or other terminal devices due to various reasons, and the distance between the first terminal device and the second terminal device is relatively close, then the first terminal device can use the second terminal device. Instead of listening by itself, in the trigger mode, the first terminal device can send trigger information to the second terminal device to trigger the second terminal device to listen instead of itself, and receive auxiliary information sent by the second terminal device. At the time, the first terminal device only needs to receive the auxiliary information sent by the second terminal device periodically or aperiodically.
  • the first resource may also be used by the first terminal device to determine the transmission resource for the first terminal device to send the test information to the second terminal device or the third terminal device, for example, the third resource, wherein the third terminal device is another terminal device different from the first terminal device and the second terminal device.
  • Step S63 the processing unit 71 of the first terminal device determines the second resource according to the first resource, and the second resource is used for the transceiver unit 72 of the first terminal device to send sideline information to the second terminal device.
  • the processing unit 71 of the first terminal device determines a third resource according to the first resource, and the third resource is used by the transceiver unit 72 of the first terminal device to send sideline information to the third terminal device.
  • Step S64 the transceiver unit 72 of the first terminal device sends the sideline information to the second terminal device on the second resource, and the transceiver unit 82 of the second terminal device receives the sideline information from the first terminal device on the second resource.
  • the sideline information includes at least one of sideline control information, sideline data, and sideline feedback information.
  • the transceiver unit 72 of the first terminal device sends the sideline information to the third terminal device on the third resource.
  • the embodiment in FIG. 6 only takes one second terminal device as an example for description.
  • the first terminal device may receive auxiliary information sent by multiple second terminal devices, and each of the multiple second terminal devices may receive auxiliary information.
  • the auxiliary information sent by the second terminal device indicates the listening result of the second terminal device that sent the auxiliary information. Therefore, the first terminal device can determine the method of sending the sideline information based on multiple listening results of multiple second terminal devices. transfer resources.
  • the second terminal device sends auxiliary information to the first terminal device at or before the first time, and the first time is determined according to the first reference time and the first time offset, that is, the first time
  • the time for the second terminal device to send the auxiliary information to the first terminal device is limited to ensure that when the first terminal device receives the auxiliary information, the first terminal device has enough time to determine the second resource for sending the sideline information , thereby improving the reliability of sideline communication.
  • FIG. 10 presents a specific example to illustrate the communication method in the embodiment of FIG. 6 .
  • the first terminal device needs to send sideline data to be sent to the second terminal device.
  • the first terminal device sends trigger information to the second terminal device at time n.
  • the trigger information is used to trigger the second terminal device to listen to surrounding terminal devices or resources.
  • the trigger information will carry at least the second time offset S, the time length L of the resource selection window, and the first time offset y1, and the second time offset is used to determine the start time of the resource selection window , the second time offset and the time length of the resource selection window are used to determine the end time of the resource selection window, and the first terminal device or the second terminal device can L determines that the start time of the resource selection window of the first terminal device is t1, and the end time is t2.
  • FIG. 10 illustrates the determination of the first time by taking the first reference time as the third time, that is, the start time t1 of the resource selection window of the first terminal device as an example.
  • the first terminal device will determine the first time n+s-y1 according to t1 and the first time offset y1, then the second terminal device must be before the first time n+s-y1 or the first time n+s-y1
  • the auxiliary information is sent to the first terminal device.
  • the second terminal device will determine the resource for sending the auxiliary information, then the second terminal device will determine the listening window (m) and the resource selection window (m) based on the time m, the listening window (m) and the
  • the resource selection window (m) is used to determine the resources used by the second terminal device to send auxiliary information to the first terminal device, and the time range of the listening window (m) is m-T0 to mT proc,0 , and the resource selection window (m ) in the time range from m+T1 to m+T2, where T0 is the start time offset of the listening window configured for the resource pool, Tproc, 0 is the predefined terminal device that is related to the subcarrier interval to detect
  • T1 is the start time offset of the resource selection window determined by the terminal device according to the device capability, which must satisfy 0 ⁇ T1 ⁇ T proc,1 , where T proc,1 is the predefined subcarrier interval
  • the second terminal device will continue to listen to the surrounding terminal devices or channel resources, and buffer the listening results. Once the second terminal device determines the listening window (m), the second terminal device will adjust the data from the buffer. Take the listening result within the time range m-T0 to mT proc, 0 corresponding to the listening window (m), and then determine in the resource selection window (m) according to the listening result and/or the resource reservation of the surrounding terminal devices A resource for the second terminal device to send auxiliary information, as shown in FIG.
  • the time domain resource of this resource is time z, that is, the second terminal device will send auxiliary information to the first terminal device at time z, and the auxiliary information is used
  • the first resource can be used by the first terminal device to determine a transmission resource for sending sideline information to the second terminal device.
  • the time domain resource of the resource for sending auxiliary information determined in the time range m+T1 to m+T2 of the resource selection window (m), that is, time z, must be before the first time n+s-y1 or equal to the first time n+s-y1.
  • the second terminal device since the second terminal device will send auxiliary information to the first terminal device at time z, the second terminal device must select resources at time k, and the time interval between time k and time z is greater than or equal to the duration y2 , y2 is the preparation time necessary for the second terminal device to send the auxiliary information, this preparation time needs to take into account the necessary time for the second terminal device to process the listening result in the listening window (k), and/or the second terminal device
  • the auxiliary information is generated, the interception result is carried in the auxiliary information, and the time required for encoding and sending the sideline information is performed.
  • the second terminal device determines the listening window (k) and the resource selection window (k) based on the time k, and the listening window (k) is used to determine that the second terminal device sends auxiliary information to the first terminal device.
  • resource and the resource selection window (k) is not important at this time, because the resource selection window (k) is used by the second terminal device to determine the resource selection window for the second terminal device to send sideline information resources, not the first terminal device. Determine the resource selection window of the new information transmission resource.
  • the resource selection window (k) can overlap with the resource selection window of the first terminal device in the time domain, and the time range of the listening window (k) is from k-T0 to kT proc,0 , the time range of the resource selection window (k) is k+T1 to k+T2.
  • the second terminal device will extract the listening results within the time range of the listening window (k) from the buffered listening results to determine the first resource, and the second terminal device will send the first resource at time z to the first resource.
  • the terminal device sends auxiliary information, where the auxiliary information is used to indicate the first resource.
  • the first terminal device after receiving the auxiliary information from the second terminal device, the first terminal device obtains available resources or unavailable resources around the second terminal device determined by the second terminal device, that is, the first resources, and then the first The terminal device determines the second resource according to the first resource and the available resources or unavailable resources determined by the first terminal device itself in its listening window.
  • the first terminal device sends sideline information to the second terminal device on the second resource.
  • the time when the second terminal device sends the auxiliary information must be before the first time n+s-y1 or equal to the first time n+s-y1, that is, the latest time for the second terminal device to send the auxiliary information is limited, and the auxiliary information is improved.
  • the timeliness of the device ensures that the first terminal device has enough time to determine the sideline information transmission resource after receiving the auxiliary information, and improves the reliability of the sideline communication.
  • An embodiment of the present application provides a communication device, where the communication device may be a first terminal device or a second terminal device, and the communication device may be a terminal device or a chip or a circuit.
  • the communication device may be used to perform the actions performed by the first terminal device or the second terminal device in the foregoing embodiments of the present application.
  • FIG. 11 shows a schematic structural diagram of a simplified terminal device.
  • the terminal device can be a car, a vehicle-mounted module, a vehicle-mounted module, a handheld device or a mobile phone, and so on.
  • the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process communication protocols and communication data, control terminal devices, execute software programs, process data of software programs, and the like.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.
  • some types of terminal devices may not have input and output devices, while some types of terminal devices, such as vehicle-mounted modules, may only include at least one of a processor, a memory, a radio frequency circuit, an antenna, and an input and output device, The other parts are arranged outside the terminal device in a way of communicating with the terminal device.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 11 only one memory and processor are shown in FIG. 11 . In an actual end device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or a storage device or the like.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit with the transceiver function can be regarded as the transceiver unit of the terminal device (the transceiver unit may be a functional unit, and the function unit can realize the sending function and the receiving function; alternatively, the transceiver unit may also It includes two functional units, namely a receiving unit capable of realizing a receiving function and a transmitting unit capable of realizing a transmitting function), and a processor with a processing function is regarded as a processing unit of the terminal device. As shown in FIG. 11 , the terminal device includes a transceiver unit 1110 and a processing unit 1120 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the processing unit may also be referred to as a processor, a processing single board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the transceiver unit 1110 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1110 may be regarded as a transmitting unit, that is, the transceiver unit 1110 includes a receiving unit and a transmitting unit.
  • the transceiver unit may also sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like.
  • the transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • transceiving unit 1110 is configured to perform sending steps or receiving operations of the first terminal device or the second terminal device in the above method embodiments
  • processing unit 1120 is configured to perform other operations except the transceiving operations in the above method embodiments.
  • the device may include a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit and/or a communication interface;
  • the processing unit may be an integrated processor, a microprocessor or an integrated circuit.
  • Embodiments of the present application provide a communication system.
  • the communication system may include the first terminal device and the second terminal device involved in the above-mentioned embodiment shown in FIG. 6 .
  • Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium.
  • the computer program When the computer program is executed by a computer, the computer can implement the method shown in FIG. 6 provided by the foregoing method embodiments. Processes related to the first terminal device or the second terminal device in the embodiment.
  • Embodiments of the present application further provide a computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 6 provided by the foregoing method embodiment. Processes related to the first terminal device or the second terminal device.
  • processors mentioned in the embodiments of the present application may be a CPU, and may also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), ready-made Field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGA Field programmable gate array
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM enhanced synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SCRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module
  • memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned computer-readable storage medium can be any available medium that can be accessed by a computer.
  • the computer-readable medium may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (electrically erasable programmable read-only memory) read only memory, EEPROM), compact disc read-only memory (CD-ROM), universal serial bus flash disk (universal serial bus flash disk), removable hard disk, or other optical disk storage, disk storage A medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • RAM random access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • universal serial bus flash disk universal serial bus flash disk
  • removable hard disk or other optical disk storage
  • disk storage A medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

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Abstract

本申请涉及一种通信方法、装置及系统，适用于车联网、智能驾驶、辅助驾驶、智能网联车等领域，其中方法包括根据第一参考时间和第一时间偏移量确定第一时间，在所述第一时间或所述第一时间以前向第一终端装置发送辅助信息，所述辅助信息用于指示第一资源，所述第一资源用于确定从所述第一终端装置接收侧行信息的第二资源，由此，发送辅助信息的时间受到了限制，以保证第一终端装置在收到辅助信息时，第一终端装置有足够的时间来确定用于发送侧行信息的第二资源，由此提高了侧行通信的可靠性。

Description

一种通信方法、装置及系统 技术领域
本申请涉及移动通信技术领域，尤其涉及一种通信方法、装置及系统。
背景技术
终端装置与终端装置之间的直连通信称为侧行通信，在侧行通信过程中，发送端终端装置可以向接收端终端装置发送侧行控制信息(sidelink control information，SCI)和侧行数据，接收端终端装置接收SCI并根据SCI来接收和译码该侧行数据。在车到一切(vehicle to everything，V2X)系统中，对于发送端终端装置来说存在两种资源分配模式，其中的一种资源分配模式为模式1(Mode-1)，在Mode-1下由基站为发送端终端装置分配资源，即Mode-1是基于基站调度的侧行通信资源分配方式；另一种资源分配模式为模式2(Mode-2)，在Mode-2下由发送端终端装置自行选择资源，即Mode-2不需要由基站调度资源，而是由终端装置自主确定用于侧行通信的资源。
在Mode-2中，发送端终端装置在时隙n触发资源选择，在以时隙为时间单位所定义的资源侦听窗(sensing window)内获取侦听结果。发送端终端装置根据该侦听结果，在以时隙为时间单位定义的资源选择窗内排除不可用的时频资源，即排除已被占用而用于无线通信的时频资源，得到该资源选择窗内可用的时频资源，再从这些可用的时频资源中确定用于侧行通信的时频资源用以发送侧行数据。在Mode-2模式中，发送端终端装置在确定用于侧行通信的时频资源时只考虑了发送端终端装置的侦听结果，即只考虑了发送端终端装置周边的无线资源占用情况，在此情况下，有时发送端终端装置在向接收端终端装置发送侧行数据时，接收端终端装置对此侧行数据的接收会受到此接收端终端装置周围的无线通信的干扰。
因此，模式2b(Mode-2b)对Mode-2进行了改进，在Mode-2b中，发送端终端装置在确定用于侧行通信的时频资源时则不只考虑发送端终端装置的侦听结果，还要考虑接收端终端装置的侦听结果，即发送端终端装置不仅要考虑发送端终端装置本身周边的无线资源占用情况，还要考虑接收端终端装置周边的无线资源占用情况，此时接收端终端装置会向发送端终端装置发送辅助信息，此辅助信息向发送端终端装置指示了接收端终端装置的上述侦听结果。但是，在现有技术中，接收端终端装置发送辅助信息的时机没有限制，发送端终端装置在收到辅助信息时可能已经错过了发送侧行信息的时机，造成侧行通信可靠性的降低。
发明内容
本申请实施例提供一种通信方法、装置及系统，用于提高侧行通信的可靠性。
辅助信息是用于辅助第一终端装置确定用于侧行信息的传输资源的信息，其时效性是非常重要的。在V2X通信中，侧行信息的传输往往要非常及时，以确保车辆能够及时获得周围车辆或行人的信息，如果辅助信息发送到第一终端装置时，第一终端装置已经错过了发送侧行信息的时机，则此辅助信息实际上已经失去了作用，降低了侧行通信的可靠性。 因此，本申请实施例确定了第一时间，在第一时间及其之前传输辅助信息即可保证辅助信息的时效性，提高侧行通信的可靠性。
第一方面，提供一种通信方法，包括：根据第一参考时间和第一时间偏移量确定第一时间；在所述第一时间或所述第一时间以前向第一终端装置发送辅助信息，所述辅助信息用于指示第一资源，所述第一资源用于确定从所述第一终端装置接收侧行信息的第二资源；其中，所述第一参考时间包括第二时间、第三时间、第四时间或第五时间，所述第二时间包括从所述第一终端装置接收触发信息的时间，所述触发信息用于触发确定所述第一资源，所述第三时间包括资源选择窗的起始时间，所述第四时间包括所述资源选择窗的结束时间，所述资源选择窗用于确定从所述第一终端装置接收侧行信息的所述第二资源，所述第五时间包括所述第一资源在时域上的起始时间。
第二终端装置在第一时间或第一时间以前向第一终端装置发送辅助信息，而第一时间是根据第一参考时间和第一时间偏移量确定的，即第二终端装置向第一终端装置发送辅助信息的时间受到了限制，以保证第一终端装置在收到辅助信息时，第一终端装置有足够的时间来确定用于发送侧行信息的第二资源，由此提高了侧行通信的可靠性。
在一种可能的设计中，所述第一时间偏移量为根据所述第一终端装置的能力确定的；或所述第一时间偏移量为预定义的时间偏移量。第一时间偏移量根据第一终端装置的能力确定可以提高第一时间偏移量的针对性，更加灵活的设定偏移量。第二时间偏移量为预定义的，则降低了系统复杂度。
在一种可能的设计中，所述方法还包括：接收来自所述第一终端装置的所述触发信息，所述触发信息包含所述资源选择窗的起始时间，所述资源选择窗的结束时间，所述第一时间偏移量，所述第一终端装置的能力，第二时间偏移量，或所述资源选择窗的时间长度中的至少一种信息，所述第二时间偏移量为从所述第一终端装置接收触发信息的时间与所述资源选择窗的起始时间之间的时间偏移量，所述第二时间偏移量用于确定所述资源选择窗的起始时间，所述第二时间偏移量和所述资源选择窗的时间长度用于确定所述资源选择窗的结束时间。
在一种可能的设计中，所述资源选择窗为所述第一终端装置的资源选择窗。由此，第二终端装置可以更有针对性的针对第一终端装置的确定侧行信息传输资源的资源选择窗进行资源选择，提高了辅助信息的效率。
在一种可能的设计中，所述方法还包括：接收来自所述第一终端装置的控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE，所述控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE用于指示所述第一时间偏移量和/或所述第一终端装置的能力。
在一种可能的设计中，所述方法还包括：在所述第二资源上接收来自所述第一终端装置的所述侧行信息。
在一种可能的设计中，所述第一资源在时域上的起始时间位于所述资源选择窗内。
在一种可能的设计中，所述第一资源包括至少一个资源，所述至少一个资源用于确定从所述第一终端装置接收侧行信息的资源，所述第一资源在时域上的起始时间包括所述至少一个资源中在时域上的第一个资源的时域起始时间。
在一种可能的设计中，所述第一时间和所述第一时间偏移量的单位为毫秒或时隙。
第二方面，提供一种通信方法，包括：根据第一参考时间和第一时间偏移量确定第一时间；在所述第一时间或所述第一时间以前从第二终端装置接收辅助信息，所述辅助信息用于指示第一资源，所述第一资源用于确定向所述第二终端装置发送侧行信息的第二资源；其中，所述第一参考时间包括第二时间、第三时间、第四时间或第五时间，所述第二时间包括向所述第二终端装置发送触发信息的时间，所述触发信息用于触发确定所述第一资源，所述第三时间包括资源选择窗的起始时间，所述第四时间包括所述资源选择窗的结束时间，所述资源选择窗用于确定向所述第二终端装置发送侧行信息的所述第二资源，所述第五时间包括所述第一资源在时域上的起始时间。
第二终端装置在第一时间或第一时间以前向第一终端装置发送辅助信息，而第一时间是根据第一参考时间和第一时间偏移量确定的，即第二终端装置向第一终端装置发送辅助信息的时间受到了限制，以保证第一终端装置在收到辅助信息时，第一终端装置有足够的时间来确定用于发送侧行信息的第二资源，由此提高了侧行通信的可靠性。
在一种可能的设计中，所述第一时间偏移量为根据第一终端装置的能力确定的；或所述第一时间偏移量为预定义的时间偏移量。
第一时间偏移量根据第一终端装置的能力确定可以提高第一时间偏移量的针对性，更加灵活的设定偏移量。第二时间偏移量为预定义的，则降低了系统复杂度。
在一种可能的设计中，所述方法还包括：向所述第二终端装置发送所述触发信息，所述触发信息包含所述资源选择窗的起始时间，所述资源选择窗的结束时间，所述第一时间偏移量，第一终端装置的能力，第二时间偏移量，或所述资源选择窗的时间长度中的至少一种信息，所述第二时间偏移量为向所述第二终端装置发送触发信息的时间与所述资源选择窗的起始时间之间的时间偏移量，所述第二时间偏移量用于确定所述资源选择窗的起始时间，所述第二时间偏移量和所述资源选择窗的时间长度用于确定所述资源选择窗的结束时间。
在一种可能的设计中，所述资源选择窗为第一终端装置的资源选择窗。
由此，第二终端装置可以更有针对性的针对第一终端装置的确定侧行信息传输资源的资源选择窗进行资源选择，提高了辅助信息的效率。
在一种可能的设计中，所述方法还包括：向所述第二终端装置发送控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE，所述控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE用于指示所述第一时间偏移量和/或第一终端装置的能力。
在一种可能的设计中，所述方法还包括：在所述第二资源上向所述第二终端装置发送所述侧行信息。
在一种可能的设计中，所述第一资源在时域上的起始时间位于所述资源选择窗内。
在一种可能的设计中，所述第一资源包括至少一个资源，所述至少一个资源用于确定向所述第二终端装置发送侧行信息的资源，所述第一资源在时域上的起始时间包括所述至少一个资源中在时域上的第一个资源的时域起始时间。
在一种可能的设计中，所述第一时间和所述第一时间偏移量的单位为毫秒或时隙。
第三方面，提供一种第二终端装置，包括：处理模块，用于根据第一参考时间和第一时间偏移量确定第一时间；收发模块，用于在所述第一时间或所述第一时间以前向第一终 端装置发送辅助信息，所述辅助信息用于指示第一资源，所述第一资源用于确定从所述第一终端装置接收侧行信息的第二资源；其中，所述第一参考时间包括第二时间、第三时间、第四时间或第五时间，所述第二时间包括从所述第一终端装置接收触发信息的时间，所述触发信息用于触发确定所述第一资源，所述第三时间包括资源选择窗的起始时间，所述第四时间包括所述资源选择窗的结束时间，所述资源选择窗用于确定从所述第一终端装置接收侧行信息的所述第二资源，所述第五时间包括所述第一资源在时域上的起始时间。
第二终端装置在第一时间或第一时间以前向第一终端装置发送辅助信息，而第一时间是根据第一参考时间和第一时间偏移量确定的，即第二终端装置向第一终端装置发送辅助信息的时间受到了限制，以保证第一终端装置在收到辅助信息时，第一终端装置有足够的时间来确定用于发送侧行信息的第二资源，由此提高了侧行通信的可靠性。
在一种可能的设计中，所述第一时间偏移量为根据所述第一终端装置的能力确定的；或所述第一时间偏移量为预定义的时间偏移量。
第一时间偏移量根据第一终端装置的能力确定可以提高第一时间偏移量的针对性，更加灵活的设定偏移量。第二时间偏移量为预定义的，则降低了系统复杂度。
在一种可能的设计中，所述收发模块，还用于接收来自所述第一终端装置的所述触发信息，所述触发信息包含所述资源选择窗的起始时间，所述资源选择窗的结束时间，所述第一时间偏移量，所述第一终端装置的能力，第二时间偏移量，或所述资源选择窗的时间长度中的至少一种信息，所述第二时间偏移量为从所述第一终端装置接收触发信息的时间与所述资源选择窗的起始时间之间的时间偏移量，所述第二时间偏移量用于确定所述资源选择窗的起始时间，所述第二时间偏移量和所述资源选择窗的时间长度用于确定所述资源选择窗的结束时间。
在一种可能的设计中，所述资源选择窗为所述第一终端装置的资源选择窗。
由此，第二终端装置可以更有针对性的针对第一终端装置的确定侧行信息传输资源的资源选择窗进行资源选择，提高了辅助信息的效率。
在一种可能的设计中，所述收发模块，还用于接收来自所述第一终端装置的控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE，所述控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE用于指示所述第一时间偏移量和/或所述第一终端装置的能力。
在一种可能的设计中，所述收发模块，还用于在所述第二资源上接收来自所述第一终端装置的所述侧行信息。
在一种可能的设计中，所述第一资源在时域上的起始时间位于所述资源选择窗内。
在一种可能的设计中，所述第一资源包括至少一个资源，所述至少一个资源用于确定从所述第一终端装置接收侧行信息的资源，所述第一资源在时域上的起始时间包括所述至少一个资源中在时域上的第一个资源的时域起始时间。
在一种可能的设计中，所述第一时间和所述第一时间偏移量的单位为毫秒或时隙。
第四方面，提供一种第一终端装置，包括：处理模块，用于根据第一参考时间和第一时间偏移量确定第一时间；收发模块，用于在所述第一时间或所述第一时间以前从第二终端装置接收辅助信息，所述辅助信息用于指示第一资源，所述第一资源用于确定向所述第二终端装置发送侧行信息的第二资源；其中，所述第一参考时间包括第二时间、第三时间、 第四时间或第五时间，所述第二时间包括向所述第二终端装置发送触发信息的时间，所述触发信息用于触发确定所述第一资源，所述第三时间包括资源选择窗的起始时间，所述第四时间包括所述资源选择窗的结束时间，所述资源选择窗用于确定向所述第二终端装置发送侧行信息的所述第二资源，所述第五时间包括所述第一资源在时域上的起始时间。
第二终端装置在第一时间或第一时间以前向第一终端装置发送辅助信息，而第一时间是根据第一参考时间和第一时间偏移量确定的，即第二终端装置向第一终端装置发送辅助信息的时间受到了限制，以保证第一终端装置在收到辅助信息时，第一终端装置有足够的时间来确定用于发送侧行信息的第二资源，由此提高了侧行通信的可靠性。
在一种可能的设计中，所述第一时间偏移量为根据所述第一终端装置的能力确定的；或所述第一时间偏移量为预定义的时间偏移量。
第一时间偏移量根据第一终端装置的能力确定可以提高第一时间偏移量的针对性，更加灵活的设定偏移量。第二时间偏移量为预定义的，则降低了系统复杂度。
在一种可能的设计中，所述收发模块，还用于向所述第二终端装置发送所述触发信息，所述触发信息包含所述资源选择窗的起始时间，所述资源选择窗的结束时间，所述第一时间偏移量，第一终端装置的能力，第二时间偏移量，或所述资源选择窗的时间长度中的至少一种信息，所述第二时间偏移量为向所述第二终端装置发送触发信息的时间与所述资源选择窗的起始时间之间的时间偏移量，所述第二时间偏移量用于确定所述资源选择窗的起始时间，所述第二时间偏移量和所述资源选择窗的时间长度用于确定所述资源选择窗的结束时间。
在一种可能的设计中，所述资源选择窗为第一终端装置的资源选择窗。
由此，第二终端装置可以更有针对性的针对第一终端装置的确定侧行信息传输资源的资源选择窗进行资源选择，提高了辅助信息的效率。
在一种可能的设计中，所述收发模块，还用于向所述第二终端装置发送控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE，所述控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE用于指示所述第一时间偏移量和/或第一终端装置的能力。
在一种可能的设计中，所述收发模块，还用于在所述第二资源上向所述第二终端装置发送所述侧行信息。
在一种可能的设计中，所述第一资源在时域上的起始时间位于所述资源选择窗内。
在一种可能的设计中，所述第一资源包括至少一个资源，所述至少一个资源用于确定向所述第二终端装置发送侧行信息的资源，所述第一资源在时域上的起始时间包括所述至少一个资源中在时域上的第一个资源的时域起始时间。
在一种可能的设计中，所述第一时间和所述第一时间偏移量的单位为毫秒或时隙。
第五方面，提供一种终端装置，包括处理器，所述处理器与至少一个存储器耦合，所述处理器用于读取所述至少一个存储器所存储的计算机程序，以执行如第一方面中任意一项所述的方法，或执行如第二方面中任意一项所述的方法。
第六方面，提供一种通信装置。该通信装置包括处理器和通信接口，通信接口可用于与其他装置进行通信。可选的，此通信装置还可以包括存储器，用于存储计算机指令。处理器和存储器相互耦合，用于实现上述第一方面或第二方面或各种可能的实施方式所描述的方法。或者，第一通信装置也可以不包括存储器，存储器可以设置于此通信装置外。处 理器、存储器和通信接口相互耦合，用于实现上述第一方面或第二方面各种可能的实施方式所描述的方法。例如，当处理器执行所述存储器存储的计算机指令时，使此通信装置执行上述第一方面或第二方面任意一种可能的实施方式中的方法。示例性地，所述第一通信装置为通信装置，或者为设置在通信装置中的芯片或其他部件。
第七方面，提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序，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如第一方面中任意一项所述的方法，或者使得所述计算机执行如第二方面中任意一项所述的方法。
第八方面，提供一种芯片或片上系统，包括处理器和通信接口，所述处理器用于读取指令以执行如第一方面中任意一项所述的方法，或者执行如第二方面中任意一项所述的方法。
芯片或片上系统还可以包括存储器，例如，所述处理器可以读取并执行所述存储器所存储的软件程序，以实现上述第一方面或第二方面任意一种可能的设计所提供的方法。或者，所述存储器也可以不包括在所述芯片内，而是位于所述芯片外部，相当于，所述处理器可以读取并执行外部存储器所存储的软件程序，以实现上述第一方面或第二方面中任意一种可能的设计所提供的方法。
第九方面，提供一种包含指令的计算机程序产品，所述计算机程序产品用于存储计算机程序，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上述第一方面或第二方面任意一种可能的设计中所述的方法。
第十方面，提供一种通信系统，包括如第三方面中任意一项所述的终端装置，以及包括如第四方面中任意一项所述的终端装置。
附图说明
图1为V2X的几种应用场景的示意图；
图2为本申请实施例提供的网络架构示意图；
图3为Mode-2的侧行信息传输资源分配方式的示意图；
图4为本申请实施例提供的一种V2X通信场景的示意图；
图5为本申请实施例提供的一种V2X通信场景的示意图；
图6为本申请实施例提供的一种通信方法的流程图；
图7为本申请实施例提供的第一终端装置的一种示意性框图；
图8为本申请实施例提供的第二终端装置的一种示意性框图；
图9为本申请实施例提供的第一参考时间的示意图；
图10为本申请实施例提供的通信方法的具体例子的示意图；
图11为本申请实施例提供的一种简化的终端装置的结构示意图。
具体实施方式
随着无线通信技术的发展，人们对高数据速率和用户体验的需求日益增长，通信技术不仅仅应用于人们的日常生活通信，也应用到许多领域，万物互联已经成为趋势，特别是 在车联网领域，与车相关的通信在汽车领域具有强烈的需求，因此在第三代合作伙伴计划(the 3rd generation partnership project，3GPP)提出了V2X通信技术。
V2X技术是车与外界进行通信的技术，这是智能汽车、自动驾驶、智能交通运输系统的基础和关键技术。V2X具体包括车与车(vehicle-to-vehicle，V2V)、车与基础设施(vehicle-to-infrastructure，V2I)和/或车与行人(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。如图1所示。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指的是车辆与基础设施的通信，基础设置例如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。
其中，V2P可以用做给道路上行人或非机动车安全警告。通过V2I，车辆可以与道路甚至其他基础设施，例如交通灯、路障等，进行通信，获取交通灯信号时序等道路管理信息。V2V可以用做车辆间信息交互和提醒，最典型的应用是用于车辆间防碰撞安全系统。V2N是目前应用最为广泛的车联网形式，其主要功能是使车辆通过移动网络，连接到云服务器，使用云服务器提供的导航、娱乐、或防盗等应用功能。
本申请实施例以V2X通信为例进行说明，但是本申请实施例也可以适用于设备到设备(Device to Device，D2D)通信，机器类通信(Machine Type Communication，MTC)或物联网(Internet of Things，IoT)通信等。请参考图2，为本申请实施例所应用的一种网络架构。
图2包括网络装置和两个终端装置，分别为终端装置1和终端装置2。这两个终端装置均可以处于该网络装置的覆盖范围内；或者这两个终端装置可以只有终端装置1处于该网络装置的覆盖范围内，而终端装置2不处于该网络装置的覆盖范围内；或者这两个终端装置均不处于该网络装置的覆盖范围内。这两个终端装置之间可以通过sidelink进行通信。图2以终端装置1处于该网络装置的覆盖范围、终端装置2不处于该网络装置的覆盖范围为例。当然图2中的终端装置的数量只是举例，在实际应用中，网络装置可以为多个终端装置提供服务。
图2中的网络装置例如为接入网装置，例如基站。其中，接入网装置在不同的系统对应不同的装置，例如,在5G系统中对应5G中的接入网装置，例如gNB，或为后续演进的通信系统中的接入网装置。其中，图2中的终端装置是以车载终端装置或车为例，但本申请实施例中的终端装置不限于此。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)终端装置，包括终端设备也可以包括内置于终端设备中的单元、模块、模组、芯片或芯片系统，终端设备例如可以为用户设备、终端设备、手机或者车，而上述单元、模块、模组、芯片或芯片系统可以设置在终端设备中。该终端装置可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音和/或数据。例如，该终端装置可以包括用户设备(user equipment，UE)、无线终端装置、移动终端装置、装置到装置(device-to-device，D2D)通信终端装置、车到一切(vehicle to everything，V2X)终端装置、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端装置、物联网(internet of things，IoT)终端装置等。
在本申请实施例中，该终端装置还可以是可穿戴装置。可穿戴装置也可以称为穿戴式智能装置或智能穿戴式装置等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可 以穿戴的装置的总称，如眼镜、手套、手表、手环、头盔、首饰、服饰及鞋等。可穿戴装置即穿在身上，或是整合到用户的衣服或配件的一种便携式装置。可穿戴装置不仅仅是一种硬件装置，更是通过软件支持以及数据交互、云端交互来实现强大的功能。
上面介绍的终端装置，如果位于车辆上(例如放置在车辆内或安装在车辆内)，都可以认为是车载终端装置，车载终端装置例如也称为车载单元(on-board unit，OBU)。
2)网络装置，包括无线接入网(radio access network，RAN)装置，例如，基站或接入点，可以是指无线接入网中在空口通过一个或多个小区与终端装置通信的装置，又例如，车到一切(vehicle-to-everything，V2X)技术中的网络装置为路侧单元(road side unit，RSU)，RSU可以是支持V2X应用的固定基础设施实体，可以与支持V2X应用的其他实体交换消息。网络装置可以包括第五代移动通信技术(the 5th generation，5G)新空口(new radio，NR)系统(也简称为NR系统)中的节点B(next generation node B，gNB)，或者也可以包括云接入网(cloud radio access network，Cloud RAN)系统中的集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)。
网络装置还可以包括核心网装置，核心网装置例如包括访问和移动管理功能(access and mobility management function，AMF)或用户面功能(user plane function，UPF)等。
本申请实施例中，用于实现网络装置的功能的装置也可以是能够支持网络装置实现该功能的装置，例如单元、模块、模组、芯片或芯片系统，该单元、模块、模组、芯片或芯片系统可以被安装在网络装置中。
前文介绍了本申请实施例所涉及到的一些名词概念，下面介绍本申请实施例涉及的V2X通信技术。
在V2X的通信过程中，发送端终端装置用于侧行信息传输的资源存在两种资源分配模式，Mode-1和Mode-2。
Mode-1的侧行信息传输资源分配方式：
Mode-1主要应用于有网络覆盖的情形下的V2X通信，由网络装置进行侧行信息传输资源的分配。具体地，Mode-1又可以包括动态调度(dynamic grant，DG)模式和预配置调度(configured grant，CG)模式。在Mode-1的DG模式下，基站会通过下行控制信息(downlink control information，DCI)调度发送端终端装置向接收端终端装置发送侧行信息的传输资源。在Mode-1的CG模式下，基站会通过高层信令，例如无线资源控制(radio resource control，RRC)信令，配置相关的侧行信息的传输资源。
Mode-2的侧行信息传输资源分配方式：
在Mode-2下，发送端终端装置的对于侧行信息传输资源的确定不依赖于基站。该模式不受限于网络覆盖，在没有网络覆盖情况下，发送端终端装置也可以用该模式进行通信。
如图3所示，首先，在Mode-2下，发送端终端装置会持续对无线资源进行侦听，当发送端终端装置在时隙n获知有待发送侧行信息要发送，则发送端终端装置会获取资源侦听窗[n-t 0,n-t proc,0)内的侦听结果，即获取时隙n之前的发送端终端装置在所述侦听窗中对无线资源进行侦听而获取的侦听结果。其中，侦听结果可以反映资源的被占用情况，其可以是根据测得的信号强度而确定的，或者是对检测到的其它终端装置发送的侧行控制信息进行解码而获取其它终端装置的侧行信息发送情况而确定的。t 0为资源侦听窗的边界值，例如t 0可以为1100ms或100ms，或者也可以为其他值。t proc,0是发送端终端装置处理侦听结果的时间，根据终端装置能力的不同t proc,0的取值会有所不同，t proc,0≥0。
其次，发送端终端装置根据该侦听结果，在资源选择窗[n+t 1,n+t 2]内排除不可用的时频资源，即被其它终端装置已经占用用于信息传输的时频资源，进而发送端终端装置确定了可以用于侧行信息传输的资源。其中0≤t 1≤t proc,1，t proc,1是终端装置处理侦听结果的时间，根据终端装置能力的不同取值不同，根据终端装置能力的不同，t proc,1的取值会有所不同。t 2_min＜t 2≤剩余的包延迟预算(packet delay budget，PDB)。PDB为一个数据包从在业务层产生到成功发送所需的最大的延时时间。例如，在时刻n，剩余的PDB则为从数据包业务层产生时刻开始在时刻n之后所剩余的延迟时间。PDB的单位可以是以时隙，子帧或帧，或者也可是绝对时间，例如单位为毫秒或秒等。
发送端终端装置具体的资源选择的方式介绍如下：
1、发送端终端装置在资源侦听窗[n-t 0,n-t proc,0)内的资源池内接收来自其它终端装置的SCI，其它终端装置可以包括发送端终端装置周围的至少一个终端装置，例如包括终端装置1。进一步地，所述SCI为第一级SCI(1st-stage SCI)，在物理侧行控制信道(physical sidelink control channel，PSCCH)上发送。所述SCI包含其它终端装置传输侧行信息的时频资源信息、传输侧行信息信息的周期信息和/或侧行信息的优先级信息等。可以理解的，发送端终端装置通过在侦听窗中检测其它终端装置的SCI，可以获知其它终端装置会占用哪些资源用于其侧行信息的传输。资源池，即侧行通信资源池，是用来传输侧行控制信息和/或数据信息时频资源集合，其频域上包含若干个连续或者不连续的子信道，时域上包含若干连续或不连续的时隙，其中子信道为频域上连续的若干个物理资源块PRB(physical resource block)。
2、如果发送端终端装置根据接收到的来自终端装置1的SCI获知，终端装置1的待发送侧行信息的传输资源位于发送端终端装置的资源选择窗口[n+t 1,n+t 2]内，则发送端终端装置根据该SCI确定资源选择窗内的哪些资源已经被终端装置1预约，则在后续的资源选择过程中此资源将被排除。
3、发送端终端装置在排除资源选择窗内的已被其它终端装置占用的时频资源或不可用的资源后，可以确定资源选择窗内剩余的资源为可用的时频资源。从而发送端终端装置从可用的时频资源中选择时频资源用于侧行信息的传输。
在现有机制中，发送端终端装置在发送数据时所使用的时频资源，是基于发送端终端装置在资源侦听窗[n-t 0,n-t proc,0)内的侦听结果来确定的。但是发送端终端装置并不知晓接收端终端装置周围的信道情况或资源占用情况。如果在接收端终端装置周围还存在其他终端装置在通信，但是发送端终端装置没有侦听到，则对于接收端终端装置而言，其在接收来自发送端终端装置数据时，就有可能受到其他终端装置的侧行通信所带来的强干扰，导致接收端终端装置的信号接收质量较差，甚至可能接收失败。
例如，可参考图4。UE1根据UE1的侦听结果选择时频资源以向UE2发送数据。由于UE3和UE4与UE1之间的距离较远，因此UE1在进行侦听时，会认为判断UE1周围没有其他终端装置进行侧行通信，则UE1向UE2发送数据。但实际上UE3在向UE4发送数据，由于UE3和UE2相距较近，当UE1向UE2发送数据的资源与UE3向UE4发送数据的资源有重叠或相同时，UE3向UE4发送数据，对于UE2接收UE1的数据来说造成了很强的干扰，导致UE2无法正确接收来自UE1的数据，降低了侧行通信的可靠性。
再例如，可参考图5。UE1进行侦听，能够侦听到UE3向UE4发送数据，则UE1认为无法通过UE3向UE4发送数据所使用的时频资源向UE2发送数据，即UE1确认UE3 向UE4发送数据所使用的时频资是不可用的时频资源。但实际由于UE1和UE4相距很远，UE4对UE1的干扰很小，UE3向UE4发送数据并不会影响UE2接收来自UE1的数据。这对于UE1来说是资源排除过度的情况，会将一些本应可以使用的资源认为是不可用的时频资源，导致UE1可用的时频资源减少。
鉴于此，Mode-2b的侧行信息传输资源分配方式对Mode-2的侧行信息传输资源分配方式进行了改进，在Mode-2b中，发送端终端装置在确定侧行信息传输资源时不仅仅需要考虑发送端终端装置对资源侦听的结果，还要考虑接收端终端装置对资源侦听的结果，在Mode-2b中，接收端终端装置会对接收端终端装置周边的终端装置进行侦听检测，即检测接收端终端装置周边的终端装置发送的SCI，由此由接收端终端装置确定对于接收端终端装置而言可用或者不可用的侧行信息传输资源，并通过向发送端终端装置发送辅助信息的方式，将所述可用或者不可用的侧行信息传输资源通知接收端终端装置。然后，接收端终端装置会根据接收端终端装置本身确定的可用或者不可用的侧行信息和接收端终端装置确定的可用或者不可用的侧行信息确定最终用于向接收端终端装置发送侧行信息的资源。
下面结合具体例子，以第一终端装置和第二终端装置为例，更加详细地描述本申请的实施例。
图6为本申请实施例提供的一种通信方法，具体可以为一种辅助信息的传输方法，还提供了第一终端装置、第二终端装置及系统。下面先介绍下图6实施例涉及的装置。如图7所示，图6中的第一终端装置包括处理单元71以及收发单元72，其中，收发单元72在发送信号时可以由发送单元代替，收发单元72在接收信号时可以由接收单元代替。如图8所示，图6中的第二终端装置包括处理单元81以及收发单元82，其中，收发单元82在发送信号时可以由发送单元代替，收发单元82在接收信号时可以由接收单元代替。
当第一终端装置和第二终端装置为车载模块、车载模组或者用户设备时，处理单元71和处理单元81可以为处理器，收发单元72或收发单元82可以为收发器，收发单元72或收发单元82由发送单元代替时，发送单元可以为发射器，收发单元72或收发单元82由接收单元代替时，接收单元可以为接收器，其中，收发器、发射器或接收器可以为射频电路，第一终端或第二终端装置还可以包含存储单元或计算机可读存储介质，当然，此存储单元或计算机可读存储介质也可以设置在第一终端或第二终端装置外，例如，存储单元或计算机可读存储介质设置于车载模块或模组外，通信连接于所述第一终端或第二终端装置，该存储单元或计算机可读存储介质用于存储计算机指令，该处理器与存储器通信连接，处理器执行存储器或计算机可读存储介质存储的计算机指令，使第一至第二终端装置执行图6实施例涉及的方法。其中，处理器可以是一个通用中央处理器(CPU)，微处理器，特定应用集成电路(Application Specific Intergrated Circuit，ASIC)。
当第一终端装置和第二终端装置为芯片或片上系统时，所述处理单元71或处理单元81例如可以是处理器，收发单元72或收发单元82可以是输出接口、管脚或电路等，收发单元72或收发单元82也可以是输入接口、管脚或电路等，收发单元72或收发单元82可以是输入/输出接口、管脚或电路等。该处理单元71或处理单元81可执行计算机指令，以使该第一终端装置或第二终端装置执行图6所涉及的方法。可选地，此计算机指令存储于存储单元或计算机可读存储介质中，所述存储单元或计算机可读存储介质可以为所述芯片内的存储单元，如寄存器、缓存等，所述存储单元或计算机可读存储介质还可以是终端设备或用户设备或车内的位于所述芯片外部的存储单元，如只读存储器(Read Only Memory， ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(Random Access Memory，RAM)等。
图6实施例涉及的通信方法，特别是一种辅助信息的传输方法包括：
步骤S60，第一终端装置的收发单元72向第二终端装置发送触发信息，第二终端装置的收发单元82接收来自第一终端装置的所述触发信息。触发信息是一种控制信息，用于触发第二终端装置确定第一资源，第一资源会用于第一终端装置确定向第二终端装置发送侧行信息的资源。
当然，步骤S60不是必需存在的步骤，Mode-2b的侧行信息传输资源确定方式包括触发式和非触发式，在触发式中第一终端装置会向第二终端装置发送触发信息以用于触发第二终端装置向第一终端装置发送辅助信息。第二终端装置接收到触发信息后，基于侦听结果进行资源选择，即第二终端装置会根据在侦听窗中的侦听结果、预约信息，在资源选择窗中进行资源选择以确定第一资源，此资源选择窗可以为第一终端装置指示给第二终端装置的第一终端装置的资源选择窗，用以告知第二终端装置第一终端装置将在此资源选择窗中进行资源选择确定用于侧行信息传输的资源，由此第二终端装置可以根据第二终端装置在侦听窗中的侦听结果以及预约信息在此资源选择窗中选择第一资源用于辅助第一终端装置确定其发送侧行信息的资源，其中，预约信息为第二终端装置接收的其它终端装置的侧行控制信息中携带的，其用于指示所述其它终端装置周期性传输侧行信息的周期信息。第二终端装置会在辅助信息中携带第二终端装置的资源选择结果，即第一资源。然后第一终端装置会根据第一终端装置自身的资源选择结果以及辅助信息中携带的第二终端装置的资源选择结果来确定第一终端装置向第二终端装置发送侧行信息所用的资源。
而在非触发式中第一终端装置不会向第二终端装置发送触发信息，此时，第二终端装置会定期或非定期的进行资源侦听，并根据侦听结果以及预约信息在资源选择窗中进行资源选择，而后将资源选择结果通过辅助信息通知给第一终端装置，此资源选择窗可以为第二终端装置的资源选择窗，也可以为预定义的资源选择窗。在非触发式中，步骤S60就不是必需存在的。
步骤S61，第一终端装置的处理单元71根据第一参考时间和第一时间偏移量确定第一时间，第二终端装置的处理单元81也会根据第一参考时间和第一时间偏移量确定第一时间，虽然，第一终端装置和第二终端装置都会在步骤61中确定第一时间，但是第一终端装置确定所述第一时间与第二终端装置确定所述第一时间没有时间先后顺序的限定。第一时间后续会用于确定第二终端装置向第一终端装置发送辅助信息的发送时间。
第一参考时间为一个时间参考点，即根据时间参考点和第一时间偏移量可以确定辅助信息的发送时间界限，即第一时间，此时间界限也可以称为时延界。第一参考时间和第一时间偏移量的计量单位可以为秒或者毫秒，当然也可以是以时隙或符号为单位。现有技术并没有规定第二终端装置向第一终端装置发送辅助信息的时间，可能会造成第一终端装置接收辅助信息时已经错过了侧行信息的发送时机，可靠性降低，有了第一时间的限制，第二终端装置必须在第一时间或第一时间以前向第一终端装置发送辅助信息，可以提高可靠性。
在步骤61中，确定第一时间需要根据两个因素来确定，一个因素为第一参考时间，另一个因素为第一时间偏移量。
如图9所示，第一参考时间可以包括四种参考时间，分别为第二时间、第三时间、第 四时间或第五时间。
第二时间包括从第一终端装置接收触发信息的时间，所述触发信息用于触发确定所述第一资源。即第二时间是步骤S60中第一终端装置向第二终端装置发送触发信息的时间，也是第二终端装置从第一终端装置接收此触发信息的时间。此时，第一终端装置或第二终端装置会根据第二时间，即根据触发信息的发送或接收时间，以及第一时间偏移量确定出第一时间。由图9可知，第一时间偏移量此时为第二时间与第一时间的时间差值，即第二终端装置发送辅助信息的第一时间是以触发信息的传输时间为参考时间点，偏移所述第一时间偏移量而得到的，由此，第二终端装置在接收到触发信息后得知第二时间，根据第一时间偏移量确定反馈辅助信息的最晚时间，即时延界，此时反馈辅助信息的时延界是相对于触发辅助信息的偏移量，处理过程简单，降低了系统复杂度。
第三时间包括资源选择窗的起始时间，所述资源选择窗用于确定从所述第一终端装置接收侧行信息的所述第二资源，即此资源选择窗用于第一终端装置向第二终端装置发送所述侧行信息的所述第二资源。所述资源选择窗为第一终端装置的资源选择窗，即第一终端装置会在此资源选择窗中确定用于传输侧行信息的资源，此资源选择窗会由第一终端装置指示给第二终端装置，以用于第二终端装置在此资源选择窗中确定第一资源，第一资源会通过所述第二终端装置发送给所述第一终端装置的辅助信息指示给所述第一终端装置。由图9可知，第一时间偏移量此时为第三时间与第一时间的时间差值，即第一时间是以资源选择窗的起始时间为参考时间点，偏移所述第一时间偏移量而得到的，由此，第一终端装置以及第二终端装置把资源选择窗的起始时间与期望的第一时间偏移量联系起来进而确定第一时间，以第三时间作为第一参考时间时，最终确定的第一时间通常在时域上距离第三时间的更近，可以节省传输第一时间偏移量的比特数量，且适用于触发和非触发场景下辅助信息发送时延界的定义，只要存在资源选择窗，即可使用第三时间做为时间参考点，实用性更强。
第四时间包括所述资源选择窗的结束时间，所述资源选择窗与第三时间作为第一参考时间的例子中描述的资源选择窗窗一致，此处不再赘述。由图9可知，第一时间偏移量此时为第四时间与第一时间的时间差值，即第二终端装置发送辅助信息的第一时间是以资源选择窗的结束时间为参考时间点，偏移所述第一时间偏移量而得到的，由此，第一终端装置以及第二终端装置把资源选择窗的的结束时间与期望的第一时间偏移量联系起来，可以保证第一时间偏移量一定为正数，减少实现复杂度，且适用于触发和非触发场景下辅助信息发送时延界的定义，只要存在资源选择窗，即可使用第四时间做为时间参考点。
上述资源选择窗可以为所述第一终端装置的资源选择窗，即第一终端装置根据侧行链路待传输数据的时延需求确定的用于选择侧行信息传输资源的一段时间，第一终端装置会在资源选择窗内确定用于传输待传输侧行信息的传输资源。
第一参考时间为第二时间的情况可以对应Mode-2b中触发式的侧行信息传输资源确定方式，第一参考时间为第三时间或第四时间的情况可以对应Mode-2b中触发式或非触发式的侧行信息传输资源确定方式。在触发式侧行信息传输资源确定方式的情况下，在步骤S60中，触发信息会包含一些信息，这些信息包括资源选择窗的起始时间，所述资源选择窗的结束时间，第一时间偏移量，所述第一终端装置或第二终端装置的能力，第二时间偏移量，或所述资源选择窗的时间长度中的至少一种信息，所述第二时间偏移量为从所述第一终端装置接收触发信息的时间与所述资源选择窗的起始时间之间的时间偏移量，所述第二时间 偏移量用于确定所述资源选择窗的起始时间，所述第二时间偏移量和所述资源选择窗的时间长度用于确定所述资源选择窗的结束时间。当触发信息包含第二时间偏移量和所述资源选择窗的时间长度时，所述资源选择窗的起始时间可以根据第二终端从第一终端装置接收触发信息的时间和第二时间偏移量确定，所述资源选择窗的结束时间则可以根据第二终端从第一终端装置接收触发信息的时间、第二时间偏移量以及所述资源选择窗的时间长度确定。可选的，上面描述的一些信息可以为网络装置通过控制信息指示给第一终端装置和/或第二终端装置的。
可选的，第一终端装置的收发单元72还可以向第二终端装置发送控制信息、侧行无线资源控制(PC5-Radio Resource Control，PC5-RRC)信令或媒体接入控制控制单元(Media Acess Control Control Element，MAC CE)，第二终端装置的收发单元82接收来自第一终端装置的所述控制信息、所述PC5-RRC信令或所述MAC CE。所述控制信息、所述PC5-RRC信令或所述MAC CE可以用于指示资源选择窗的起始时间，所述资源选择窗的结束时间，第一时间偏移量，所述第一终端装置或第二终端装置的能力，第二时间偏移量，或所述资源选择窗的时间长度中的至少一种信息。
第五时间包括第一资源在时域上的起始时间。第一参考时间为第五时间的情况可以对应Mode-2b中触发式的或非触发式的侧行信息传输资源确定方式。
对应于触发式的情况，第二终端装置在接收到步骤S60中的触发信息后，第二终端装置会对其周围的信道环境进行侦听，例如，第二终端装置可以接收来自第二终端装置周围的终端装置发送的侧行控制信息，由此可以获知第二终端装置周围的终端装置在哪些资源上传输侧行信息，或者第二终端装置也可以对无线资源进行信号强度的测量，由此，第二终端装置即可确定第二终端装置周边哪些资源是可用的，或者不可用的，并将可用资源或者不可用资源在辅助信息中告知第一终端装置，第二终端装置获取的可用资源或者不可用资源即为所述第一资源。对应于非触发式的情况，第二终端装置在没有收到第一终端装置的触发信息的情况下也会定期或不定期的对其周围的信道环境进行侦听，例如，第二终端装置可以接收来自第二终端装置周围的终端装置发送的侧行控制信息，由此可以获知第二终端装置周围的终端装置在哪些资源上传输侧行信息，或者第二终端装置也可以对无线资源进行信号强度的测量，由此，第二终端装置即可确定第二终端装置周边哪些资源是可用的，或者不可用的，并将可用资源或者不可用资源在辅助信息中告知第一终端装置，第二终端装置获取的可用资源或者不可用资源即为所述第一资源。可选的，第一资源位于所述资源选择窗内。
第一终端装置还可以通过触发信息或者其它的侧行控制信息指示第二终端装置所述第一参考时间为第二时间至第五时间中的哪个时间。即第一参考时间可以为多种可能时间的情况时，第一终端装置可以通过触发信息或者其它的侧行控制信息告知第二终端装置以哪个参考时间作为第一参考时间。
第一资源包括至少一个资源，所述至少一个资源用于确定从所述第一终端装置接收侧行信息的资源，所述第一资源在时域上的起始时间包括所述至少一个资源中在时域上的第一个资源的时域起始时间。在图9中，第一资源为一块在时域上连续的资源，实际上，第一资源还可以为多个资源的集合，即第一资源在时域上包括不连续的多块资源。而所述第五时间则为第二终端装置确定的可用资源或者不可用资源在时域上的最早的时刻，即起始时间。由图9可知，第一时间偏移量此时为第五时间与第一时间的时间差值，即第二终端 装置发送辅助信息的第一时间是以第一资源在时域上的起始时间为参考时间点，偏移所述第一时间偏移量而得到的。
第一时间偏移量可以为根据所述第一终端装置或者第二终端装置的能力确定的，即第二终端装置发送辅助信息的第一时间是需要考虑第一终端装置或者第二终端装置的能力的，例如，第一终端装置或第二终端装置的能力越大，即处理速度或者计算速度很快时，第一时间偏移量的取值可以越小。第一终端装置或第二终端装置的能力可以由触发信息携带，由此提高了第一时间确定的灵活性。由此，确保第一终端装置在接收到辅助信息后，有足够的时间进行调度和侧行信息编码发送，避免由于第一终端装置的能力不足造成的辅助信息的浪费，保证第一终端装置的侧行信息能够及时发送。
第一时间偏移量也可以是根据以下至少一种时间确定的：
1)资源合并所需要的时间。第一终端装置除了接收第二终端装置的辅助信息，还可能接收至少一个其它终端装置发送的辅助信息，此时，第一终端装置需要对第二终端装置发送的辅助信息和所述至少一个其它终端装置发送的辅助信息中指示的用于确定第一终端装置发送侧行信息的资源的至少一个资源进行资源合并，此资源合并需要一定的时间，因此，第一时间偏移量可以基于此资源合并所需的时间确定。
2)将1)中的资源合并结果上报给媒体接入控制(Media Acess Control，MAC)层所需要的处理或传输时间。
3)MAC层决策最终的资源选择结果的时间。即在2)中MAC层接收到了资源合并结果，则MAC层会在资源合并结果中确定最终用于第一终端装置发送侧行信息的资源，这需要一定的时间，因此，第一时间偏移量可以基于此MAC层决策最终的资源选择结果的时间确定。
4)MAC层将3)中确定的最终用于第一终端装置发送侧行信息的资源指示给第一终端装置的物理层所需要的时间。
5)侧行信息的发送准备时间。第一终端装置在确定或者获取了即将用于侧行信息传输的资源后，需要对待发送的侧行信息进行编码、映射等操作，即侧行信息的发送准备时间，因此，第一时间偏移量可以基于侧行信息的发送准备时间确定。
此时，以上至少一种时间可以由触发信息携带，由此提高了第一时间确定的灵活性。
第一时间偏移量还也可以为预定义的时间偏移量，即由协议规定第一时间偏移量的具体值，此时，第一时间偏移量的具体值可以存储于第一终端装置或第二终端装置的存储器中，在需要确定第一时间的时候，由第一终端装置或第二终端装置调取。协议规定第一时间偏移量的具体值，降低了系统的复杂度。
第一时间偏移量的取值可以为n，n为负整数、0或正整数，第一时间偏移量的计量单位可以为秒或者毫秒，当然也可以是以时隙或符号为单位。
步骤S62，第二终端装置的收发单元82在所述第一时间或所述第一时间以前向第一终端装置发送辅助信息，第一终端装置的收发单元72在所述第一时间或所述第一时间以前接收来自第一终端装置的辅助信息，所述辅助信息用于指示第一资源，所述第一资源用于确定从所述第一终端装置接收侧行信息的第二资源。辅助信息可以包括比特地图(bit map)，此比特地图用于指示第一资源，例如，比特地图的比特串中某一位比特为1则表示此比特对应的资源可以用于侧行信息的传输。一个可能的场景为，第一终端装置由于种种原因无 法对无线资源或者其它终端装置进行侦听，而第一终端装置与第二终端装置距离较近，则第一终端装置可以利用第二终端装置代替自己进行侦听，在触发式时，第一终端装置可以向第二终端装置发送触发信息来触发第二终端装置代替自己侦听，并接收第二终端装置发送的辅助信息，在非触发式时，第一终端装置接收第二终端装置定期或非定期发送的辅助信息即可。此时，所述第一资源还可以用于第一终端装置确定第一终端装置向第二终端装置或第三终端装置发送测性信息的传输资源，例如，第三资源，其中第三终端装置为不同于第一终端装置和第二终端装置的另外的终端装置。
步骤S63，第一终端装置的处理单元71根据第一资源确定第二资源，第二资源用于第一终端装置的收发单元72向第二终端装置发送侧行信息。可选的，第一终端装置的处理单元71根据第一资源确定第三资源，第三资源用于第一终端装置的收发单元72向第三终端装置发送侧行信息。
步骤S64，第一终端装置的收发单元72在第二资源上向第二终端装置发送侧行信息，第二终端装置的收发单元82在第二资源上接收来自第一终端装置的此侧行信息，侧行信息包括侧行控制信息，侧行数据，侧行反馈信息中的至少一种。第一终端装置的收发单元72在第三资源上向第三终端装置发送侧行信息。
图6实施例仅以1个第二终端装置为例进行说明，在实际的场景中，第一终端装置可以接收多个第二终端装置发送的辅助信息，多个第二终端装置中的每一个第二终端装置发送的辅助信息指示了发送此辅助信息的第二终端装置的侦听结果，因此，第一终端装置可以基于多个第二终端装置的多个侦听结果确定发送侧行信息的传输资源。
通过本申请实施例，第二终端装置在第一时间或第一时间以前向第一终端装置发送辅助信息，而第一时间是根据第一参考时间和第一时间偏移量确定的，即第二终端装置向第一终端装置发送辅助信息的时间受到了限制，以保证第一终端装置在收到辅助信息时，第一终端装置有足够的时间来确定用于发送侧行信息的第二资源，由此提高了侧行通信的可靠性。
图10给出了一个具体的例子来说明图6实施例中的通信方法。
第一步骤，第一终端装置有待发送侧行数据要发送给第二终端装置，在Mode-2b的侧行资源确定方式下，第一终端装置在时间n向第二终端装置发送触发信息，此触发信息用于触发第二终端装置对周围的终端装置或资源进行侦听。触发信息中会至少携带第二时间偏移量S、资源选择窗的时间长度L以及第一时间偏移量y1，所述第二时间偏移量用于确定所述资源选择窗的起始时间，所述第二时间偏移量和所述资源选择窗的时间长度用于确定所述资源选择窗的结束时间，第一终端装置或第二终端装置可以根据时刻n，所述S和所述L确定第一终端装置的资源选择窗的起始时间为t1，结束时间为t2。
图10以第一参考时间为第三时间，即第一终端装置的资源选择窗的起始时间t1为例进行说明第一时间的确定。第一终端装置会根据t1和第一时间偏移量y1确定第一时间n+s-y1，则第二终端装置必须在第一时间n+s-y1或第一时间n+s-y1以前向第一终端装置发送辅助信息。
第二步骤，第二终端装置收到触发信息后，假设会在时间m进行资源选择，即对第二终端装置周围的终端装置或资源进行侦听。
在第二步骤中，首先第二终端装置会确定发送辅助信息的资源，则第二终端装置会基于时间m确定侦听窗(m)和资源选择窗(m)，侦听窗(m)和资源选择窗(m)是用于确定第二终 端装置向第一终端装置发送辅助信息的资源的，侦听窗(m)的时间范围为m-T0至m-T proc，0，资源选择窗(m)的时间范围为m+T1至m+T2，其中T0是为资源池配置的侦听窗的起始时间偏移量，T proc，0为预定义的跟子载波间隔相关的终端装置进行侦听处理的基本能力，T1为终端装置根据设备能力确定的资源选择窗的起始时间偏移量，需满足0≤T1≤T proc,1，其中T proc,1为预定义的跟子载波间隔相关的终端装置进行侧行信息编码发送的基本能力，T2为终端设备根据设备能力确定的资源选择窗的截止时间偏移量满足T1＜T2≤PDB，其中包延迟预算(packet delay budget，PDB)表示侧行信息的生存时间，即侧行信息需要在PDB之前发送出去。通常第二终端装置会持续对周边终端装置或者信道资源进行侦听，并对侦听结果进行缓存，一旦第二终端装置确定了侦听窗(m)，则第二终端装置会从缓存中调取侦听窗(m)对应的时间范围m-T0至m-T proc，0内的侦听结果，而后根据侦听结果和/或周边终端装置的资源预留情况在资源选择窗(m)中确定用于第二终端装置发送辅助信息的资源，如图10所示，此资源的时域资源为时间z，即第二终端装置会在时间z向第一终端装置发送辅助信息，此辅助信息用于指示第一资源，此第一资源可用于第一终端装置确定向第二终端装置发送侧行信息的传输资源。另外，资源选择窗(m)的结束时间m+T2在第一时间n+s-y1与之前，或者资源选择窗(m)的结束时间m+T2与第一时间n+s-y1相同，即m+T2＜＝n+s-y1，。此时在资源选择窗(m)的时间范围m+T1至m+T2内所确定的所述发送辅助信息的资源的时域资源，即时间z，必须在第一时间n+s-y1之前或等于第一时间n+s-y1。
第三步骤，由于第二终端装置会在时间z向第一终端装置发送辅助信息，则第二终端装置必须在时间k进行资源选择，而时间k与时间z之间的时间间隔大于等于时长y2，y2为第二终端装置发送辅助信息所必需的准备时间，此准备时间需要考虑第二终端装置对侦听窗(k)中的侦听结果进行处理的必要时间，和/或第二终端装置生成辅助信息，并将侦听结果携带于辅助信息中，并进行侧行信息编码发送所必需的时间。
第四步骤，第二终端装置会基于时间k确定侦听窗(k)和资源选择窗(k)，侦听窗(k)是用于确定第二终端装置向第一终端装置发送辅助信息的资源的，而资源选择窗(k)此时并不重要，因为资源选择窗(k)是用于第二终端装置确定第二终端装置发送侧行信息资源的资源选择窗，不是第一终端装置进行确定侧新信息传输资源的资源选择窗，当然，资源选择窗(k)可以与第一终端装置的资源选择窗在时域上重合，侦听窗(k)的时间范围为k-T0至k-T proc，0，资源选择窗(k)的时间范围为k+T1至k+T2。
第五步骤，第二终端装置会在其缓存的侦听结果中抽取侦听窗(k)的时间范围内的侦听结果以确定第一资源，且第二终端装置会在时间z向第一终端装置发送辅助信息，此辅助信息用于指示第一资源。
第六步骤，第一终端装置接收到来自第二终端装置的辅助信息后，获取了第二终端装置确定的第二终端装置周围的可用资源或不可用资源，即第一资源，而后，第一终端装置会根据第一资源以及第一终端装置自身在其侦听窗中确定的可用资源或不可用资源确定第二资源。
第七步骤，第一终端装置会在第二资源上向第二终端装置发送侧行信息。
第二终端装置发送辅助信息的时间必须在第一时间n+s-y1之前或等于第一时间n+s-y1，即限制了第二终端装置发送辅助信息的最晚时间，提高了辅助信息的时效性，确保了第一终端装置在收到辅助信息后有足够的时间进行侧行信息传输资源的确定，提高了侧行通信的可靠性。
本申请实施例提供一种通信装置，此通信装置可以为第一终端装置或第二终端装置，该通信装置可以是终端设备也可以是芯片或电路。该通信装置可以用于执行本申请上述实施例中由第一终端装置或第二终端装置所执行的动作。
当该通信装置为终端装置时，图11示出了一种简化的终端装置的结构示意图。此终端装置可以为车，车载模块，车载模组，手持设备或手机等等。如图11所示，终端装置包括处理器、存储器、射频电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对终端装置进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端装置可以不具有输入输出装置，而有些种类的终端装置，例如车载模块，则可以只包括处理器、存储器、射频电路、天线以及输入输出装置中的至少一个，而其余的部分都是以与终端装置通信连接的方式设置在此终端装置的外部。
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端装置时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明，图11中仅示出了一个存储器和处理器。在实际的终端装置产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储装置等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端装置的收发单元(收发单元可以是一个功能单元，该功能单元能够实现发送功能和接收功能；或者，收发单元也可以包括两个功能单元，分别为能够实现接收功能的接收单元和能够实现发送功能的发送单元)，将具有处理功能的处理器视为终端装置的处理单元。如图11所示，终端装置包括收发单元1110和处理单元1120。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元1110中用于实现接收功能的器件视为接收单元，将收发单元1110中用于实现发送功能的器件视为发送单元，即收发单元1110包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
应理解，收发单元1110用于执行上述方法实施例中第一终端装置或第二终端装置的发送步骤或接收操作，处理单元1120用于执行上述方法实施例中除了收发操作之外的其他操作。
当该通信装置为芯片类的装置或者电路时，该装置可以包括收发单元和处理单元。其中，所述收发单元可以是输入输出电路和/或通信接口；处理单元为集成的处理器或者微处理器或者集成电路。
本申请实施例提供一种通信系统。该通信系统可以包括上述的图6所示的实施例所涉及的第一终端装置以及第二终端装置。
本申请实施例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存储有计算 机程序，该计算机程序被计算机执行时，所述计算机可以实现上述方法实施例提供的图6所示的实施例中与第一终端装置或第二终端装置相关的流程。
本申请实施例还提供一种计算机程序产品，所述计算机程序产品用于存储计算机程序，该计算机程序被计算机执行时，所述计算机可以实现上述方法实施例提供的图6所示的实施例中与第一终端装置或第二终端装置相关的流程。
应理解，本申请实施例中提及的处理器可以是CPU，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。
应注意，本文描述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。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机装置(可以是个人计算机，服务器，或者网络装置等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的计算机可读存储介质，可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括随机存取存储器(random access memory，RAM)、只读存储器(read-only memory，ROM)、电可擦可编程只读存储器(electrically erasable programmable read only memory，EEPROM)、紧凑型光盘只读存储器(compact disc read-only memory，CD-ROM)、通用串行总线闪存盘(universal serial bus flash disk)、移动硬盘、或其他光盘存储、磁盘存储介质或者其他磁存储装置、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。
以上所述，仅为本申请的具体实施方式，但本申请实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请实施例的保护范围之内。因此，本申请实施例的保护范围应所述以权利要求的保护范围为准。

Claims (40)

  1. 一种通信方法，其特征在于，包括：
    根据第一参考时间和第一时间偏移量确定第一时间；
    在所述第一时间或所述第一时间以前向第一终端装置发送辅助信息，所述辅助信息用于指示第一资源，所述第一资源用于确定从所述第一终端装置接收侧行信息的第二资源；
    其中，所述第一参考时间包括第二时间、第三时间、第四时间或第五时间，
    所述第二时间包括从所述第一终端装置接收触发信息的时间，所述触发信息用于触发确定所述第一资源，
    所述第三时间包括资源选择窗的起始时间，
    所述第四时间包括所述资源选择窗的结束时间，所述资源选择窗用于确定从所述第一终端装置接收侧行信息的所述第二资源，
    所述第五时间包括所述第一资源在时域上的起始时间。
  2. 根据权利要求1所述的方法，其特征在于，
    所述第一时间偏移量为根据所述第一终端装置的能力确定的；或
    所述第一时间偏移量为预定义的时间偏移量。
  3. 根据权利要求1-2任意一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述第一终端装置的所述触发信息，所述触发信息包含所述资源选择窗的起始时间，所述资源选择窗的结束时间，所述第一时间偏移量，所述第一终端装置的能力，第二时间偏移量，或所述资源选择窗的时间长度中的至少一种信息，所述第二时间偏移量为从所述第一终端装置接收触发信息的时间与所述资源选择窗的起始时间之间的时间偏移量，所述第二时间偏移量用于确定所述资源选择窗的起始时间，所述第二时间偏移量和所述资源选择窗的时间长度用于确定所述资源选择窗的结束时间。
  4. 根据权利要求1-3任意一项所述的方法，其特征在于，所述资源选择窗为所述第一终端装置的资源选择窗。
  5. 根据权利要求1-2任意一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述第一终端装置的控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE，所述控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE用于指示所述第一时间偏移量和/或所述第一终端装置的能力。
  6. 根据权利要求1-5任意一项所述的方法，其特征在于，所述方法还包括：
    在所述第二资源上接收来自所述第一终端装置的所述侧行信息。
  7. 根据权利要求1-6任意一项所述的方法，其特征在于，
    所述第一资源在时域上的起始时间位于所述资源选择窗内。
  8. 根据权利要求7所述的方法，其特征在于，
    所述第一资源包括至少一个资源，所述至少一个资源用于确定从所述第一终端装置接收侧行信息的资源，所述第一资源在时域上的起始时间包括所述至少一个资源中在时域上的第一个资源的时域起始时间。
  9. 根据权利要求1-8任意一项所述的方法，其特征在于，
    所述第一时间和所述第一时间偏移量的单位为毫秒或时隙。
  10. 一种通信方法，其特征在于，包括：
    根据第一参考时间和第一时间偏移量确定第一时间；
    在所述第一时间或所述第一时间以前从第二终端装置接收辅助信息，所述辅助信息用于指示第一资源，所述第一资源用于确定向所述第二终端装置发送侧行信息的第二资源；
    其中，所述第一参考时间包括第二时间、第三时间、第四时间或第五时间，
    所述第二时间包括向所述第二终端装置发送触发信息的时间，所述触发信息用于触发确定所述第一资源，
    所述第三时间包括资源选择窗的起始时间，
    所述第四时间包括所述资源选择窗的结束时间，所述资源选择窗用于确定向所述第二终端装置发送侧行信息的所述第二资源，
    所述第五时间包括所述第一资源在时域上的起始时间。
  11. 根据权利要求10所述的方法，其特征在于，
    所述第一时间偏移量为根据第一终端装置的能力确定的；或
    所述第一时间偏移量为预定义的时间偏移量。
  12. 根据权利要求10-11任意一项所述的方法，其特征在于，所述方法还包括：
    向所述第二终端装置发送所述触发信息，所述触发信息包含所述资源选择窗的起始时间，所述资源选择窗的结束时间，所述第一时间偏移量，第一终端装置的能力，第二时间偏移量，或所述资源选择窗的时间长度中的至少一种信息，所述第二时间偏移量为向所述第二终端装置发送触发信息的时间与所述资源选择窗的起始时间之间的时间偏移量，所述第二时间偏移量用于确定所述资源选择窗的起始时间，所述第二时间偏移量和所述资源选择窗的时间长度用于确定所述资源选择窗的结束时间。
  13. 根据权利要求10-12任意一项所述的方法，其特征在于，所述资源选择窗为第一终端装置的资源选择窗。
  14. 根据权利要求10-11任意一项所述的方法，其特征在于，所述方法还包括：
    向所述第二终端装置发送控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE，所述控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE用于指示所述第一时间偏移量和/或第一终端装置的能力。
  15. 根据权利要求10-14任意一项所述的方法，其特征在于，所述方法还包括：
    在所述第二资源上向所述第二终端装置发送所述侧行信息。
  16. 根据权利要求10-15任意一项所述的方法，其特征在于，
    所述第一资源在时域上的起始时间位于所述资源选择窗内。
  17. 根据权利要求16所述的方法，其特征在于，
    所述第一资源包括至少一个资源，所述至少一个资源用于确定向所述第二终端装置发送侧行信息的资源，所述第一资源在时域上的起始时间包括所述至少一个资源中在时域上的第一个资源的时域起始时间。
  18. 根据权利要求10-17任意一项所述的方法，其特征在于，
    所述第一时间和所述第一时间偏移量的单位为毫秒或时隙。
  19. 一种第二终端装置，其特征在于，包括：
    处理模块，用于根据第一参考时间和第一时间偏移量确定第一时间；
    收发模块，用于在所述第一时间或所述第一时间以前向第一终端装置发送辅助信息，所述辅助信息用于指示第一资源，所述第一资源用于确定从所述第一终端装置接收侧行信 息的第二资源；
    其中，所述第一参考时间包括第二时间、第三时间、第四时间或第五时间，
    所述第二时间包括从所述第一终端装置接收触发信息的时间，所述触发信息用于触发确定所述第一资源，
    所述第三时间包括资源选择窗的起始时间，
    所述第四时间包括所述资源选择窗的结束时间，所述资源选择窗用于确定从所述第一终端装置接收侧行信息的所述第二资源，
    所述第五时间包括所述第一资源在时域上的起始时间。
  20. 根据权利要求19所述的装置，其特征在于，
    所述第一时间偏移量为根据所述第一终端装置的能力确定的；或
    所述第一时间偏移量为预定义的时间偏移量。
  21. 根据权利要求19-20任意一项所述的装置，其特征在于，
    所述收发模块，还用于接收来自所述第一终端装置的所述触发信息，所述触发信息包含所述资源选择窗的起始时间，所述资源选择窗的结束时间，所述第一时间偏移量，所述第一终端装置的能力，第二时间偏移量，或所述资源选择窗的时间长度中的至少一种信息，所述第二时间偏移量为从所述第一终端装置接收触发信息的时间与所述资源选择窗的起始时间之间的时间偏移量，所述第二时间偏移量用于确定所述资源选择窗的起始时间，所述第二时间偏移量和所述资源选择窗的时间长度用于确定所述资源选择窗的结束时间。
  22. 根据权利要求19-21任意一项所述的装置，其特征在于，所述资源选择窗为所述第一终端装置的资源选择窗。
  23. 根据权利要求19-20任意一项所述的装置，其特征在于，
    所述收发模块，还用于接收来自所述第一终端装置的控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE，所述控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE用于指示所述第一时间偏移量和/或所述第一终端装置的能力。
  24. 根据权利要求19-23任意一项所述的装置，其特征在于，
    所述收发模块，还用于在所述第二资源上接收来自所述第一终端装置的所述侧行信息。
  25. 根据权利要求19-24任意一项所述的装置，其特征在于，
    所述第一资源在时域上的起始时间位于所述资源选择窗内。
  26. 根据权利要求25所述的装置，其特征在于，
    所述第一资源包括至少一个资源，所述至少一个资源用于确定从所述第一终端装置接收侧行信息的资源，所述第一资源在时域上的起始时间包括所述至少一个资源中在时域上的第一个资源的时域起始时间。
  27. 根据权利要求19-26任意一项所述的装置，其特征在于，
    所述第一时间和所述第一时间偏移量的单位为毫秒或时隙。
  28. 一种第一终端装置，其特征在于，包括：
    处理模块，用于根据第一参考时间和第一时间偏移量确定第一时间；
    收发模块，用于在所述第一时间或所述第一时间以前从第二终端装置接收辅助信息，所述辅助信息用于指示第一资源，所述第一资源用于确定向所述第二终端装置发送侧行信息的第二资源；
    其中，所述第一参考时间包括第二时间、第三时间、第四时间或第五时间，
    所述第二时间包括向所述第二终端装置发送触发信息的时间，所述触发信息用于触发确定所述第一资源，
    所述第三时间包括资源选择窗的起始时间，
    所述第四时间包括所述资源选择窗的结束时间，所述资源选择窗用于确定向所述第二终端装置发送侧行信息的所述第二资源，
    所述第五时间包括所述第一资源在时域上的起始时间。
  29. 根据权利要求28所述的装置，其特征在于，
    所述第一时间偏移量为根据所述第一终端装置的能力确定的；或
    所述第一时间偏移量为预定义的时间偏移量。
  30. 根据权利要求28-29任意一项所述的装置，其特征在于，
    所述收发模块，还用于向所述第二终端装置发送所述触发信息，所述触发信息包含所述资源选择窗的起始时间，所述资源选择窗的结束时间，所述第一时间偏移量，第一终端装置的能力，第二时间偏移量，或所述资源选择窗的时间长度中的至少一种信息，所述第二时间偏移量为向所述第二终端装置发送触发信息的时间与所述资源选择窗的起始时间之间的时间偏移量，所述第二时间偏移量用于确定所述资源选择窗的起始时间，所述第二时间偏移量和所述资源选择窗的时间长度用于确定所述资源选择窗的结束时间。
  31. 根据权利要求28-30任意一项所述的装置，其特征在于，所述资源选择窗为第一终端装置的资源选择窗。
  32. 根据权利要求28-29任意一项所述的装置，其特征在于，
    所述收发模块，还用于向所述第二终端装置发送控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE，所述控制信息、侧行无线资源控制PC5-RRC信令或媒体接入控制控制单元MAC CE用于指示所述第一时间偏移量和/或第一终端装置的能力。
  33. 根据权利要求28-32任意一项所述的装置，其特征在于，
    所述收发模块，还用于在所述第二资源上向所述第二终端装置发送所述侧行信息。
  34. 根据权利要求28-33任意一项所述的装置，其特征在于，
    所述第一资源在时域上的起始时间位于所述资源选择窗内。
  35. 根据权利要求34所述的装置，其特征在于，
    所述第一资源包括至少一个资源，所述至少一个资源用于确定向所述第二终端装置发送侧行信息的资源，所述第一资源在时域上的起始时间包括所述至少一个资源中在时域上的第一个资源的时域起始时间。
  36. 根据权利要求28-35任意一项所述的装置，其特征在于，
    所述第一时间和所述第一时间偏移量的单位为毫秒或时隙。
  37. 一种终端装置，其特征在于，包括处理器，所述处理器与至少一个存储器耦合，所述处理器用于读取所述至少一个存储器所存储的计算机程序，以执行如权利要求1～9中任意一项所述的方法，或执行如权利要求10～18中任意一项所述的方法。
  38. 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用于存储计算机程序，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如权利要求1～9中任意一项所述的方法，或者使得所述计算机执行如权利要求10～18中任意一项所述的方法。
  39. 一种芯片，其特征在于，包括处理器和通信接口，所述处理器用于读取指令以执行权利要求1～9中任意一项所述的方法，或者执行权利要求10～18中任意一项所述的方法。
  40. 一种通信系统，其特征在于，包括如权利要求19～27中任意一项所述的终端装置，以及包括如权利要求28～36中任意一项所述的终端装置。
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