WO2023108417A1 - 通信方法及终端设备 - Google Patents

通信方法及终端设备 Download PDF

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Publication number
WO2023108417A1
WO2023108417A1 PCT/CN2021/137899 CN2021137899W WO2023108417A1 WO 2023108417 A1 WO2023108417 A1 WO 2023108417A1 CN 2021137899 W CN2021137899 W CN 2021137899W WO 2023108417 A1 WO2023108417 A1 WO 2023108417A1
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WO
WIPO (PCT)
Prior art keywords
resource
terminal device
reserved
psfch
resources
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PCT/CN2021/137899
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English (en)
French (fr)
Inventor
张世昌
赵振山
林晖闵
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2021/137899 priority Critical patent/WO2023108417A1/zh
Publication of WO2023108417A1 publication Critical patent/WO2023108417A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/02Selection of wireless resources by user or terminal

Definitions

  • the present application relates to the technical field of communication, and more specifically, to a communication method and a terminal device.
  • the first terminal device when the first terminal device detects that there is a conflict in the reserved resources of the second terminal device, the first terminal device may send a first physical sidelink feedback channel (physical sidelink feedback channel, PSFCH) to carry a resource conflict indication, indicating that conflicting reserved resources exist in the resources reserved by the second terminal device.
  • PSFCH physical sidelink feedback channel
  • the resources used to transmit PSFCH are less, and when PSFCH is actually transmitted, PSFCH usually only occupies one symbol in the time domain and only one physical resource block (physical resource block, PRB) in the frequency domain. Therefore, the PSFCH Capacity is usually only 1 bit. If the identifier of the conflicting reserved resource is directly carried in the resource conflict indication, the resources used to transmit the PSFCH cannot carry the resource conflict indication and hybrid automatic repeat request (HARQ) feedback at the same time.
  • HARQ hybrid automatic repeat request
  • the present application provides a communication method and terminal equipment to reduce the number of bits occupied by PSFCH.
  • a communication method including: a first terminal device receives resource indication information and target data, the resource indication information is used to indicate a plurality of reserved resources reserved by a second terminal device, and the plurality of Part or all of the reserved resources belong to the first resource; if there is a conflict in the reserved resources in the first resource, the first terminal device will Feedback the association relationship between the transmission modes of the PSFCH channel, and determine the transmission mode of the first PSFCH associated with the first resource, where the first PSFCH carries the first resource conflict indication and/or the target data
  • the first HARQ feedback the first resource conflict indication is used to indicate that there is a conflict in the reserved resources in the first resource
  • the transmission mode of the PSFCH includes a resource conflict indication for indicating that there is a conflict in the reserved resources sequence, and/or, to send or not to send HARQ feedback.
  • a communication method receives resource indication information and target data.
  • the resource indication information is used to indicate a plurality of reserved resources reserved by a second terminal device.
  • the plurality of reserved resources Part or all of the reserved resources in the resources belong to the first resource; if the reserved resources in the first resource conflict, the first terminal device
  • the association relationship between the PSFCH transmission modes determines the first PSFCH transmission mode associated with the first resource, where the first PSFCH carries the first resource conflict indication and/or the first resource conflict indication for the target data
  • the first resource conflict indication is used to indicate that there is a conflict in the reserved resources in the first resource
  • the transmission method of the PSFCH includes the frequency domain occupied by the conflict indication used to indicate the conflicted reserved resources unit, and/or, to send or not to send HARQ feedback.
  • a communication method including: a first terminal device receives resource indication information and target data, where the resource indication information is used to indicate a plurality of reserved resources reserved by a second terminal device, and the plurality of The reserved resources include a first reserved resource; if there is a conflict in the first reserved resource, the first terminal device is a retransmission resource or an initial resource for the target data based on the first reserved resource transmit resources, and determine the transmission mode of the first physical sidelink feedback channel PSFCH, wherein the transmission mode of the first PSFCH includes carrying the first resource conflict indication and/or the first resource conflict indication for the target data in the first PSFCH A HARQ feedback, the first resource conflict indication is used to indicate that there is a conflict in the first reserved resource.
  • a communication method including: a first terminal device receives resource indication information sent by a second terminal device in a first time domain unit, and the resource indication information is used to indicate that the second terminal device The target reserved resource in the second time domain unit; the first terminal device sends a resource conflict indication to the second terminal device in the third time domain unit, and the resource conflict indication is used to indicate the target reserved resource Conflicting reserved resources exist in , wherein the position of the third time domain unit in the time domain is determined based on one or more of the following information: the position of the first time domain unit in the time domain ; the position of the second time domain unit in the time domain; the time required for the first terminal device to decode the indication information; the time required for the first terminal device to prepare the resource conflict indication; the The time required for the second terminal device to decode the resource conflict indication; and the time required for the second terminal device to prepare to transmit data on the reserved resource.
  • a communication method including: a second terminal device sends resource indication information and target data to a first terminal device, where the resource indication information is used to indicate multiple reservations reserved by the second terminal device resources, some or all of the reserved resources belong to the first resource; in the case that the reserved resources in the first resource conflict, the second terminal device receives the first terminal device
  • the transmitted first physical sidelink feedback channel PSFCH, the transmission mode of the first PSFCH is determined based on the association between the first resource, the conflicting reserved resource and the transmission mode of the physical sidelink feedback channel PSFCH , wherein, the first PSFCH carries a first resource conflict indication and/or a first HARQ feedback for the target data, and the first resource conflict indication is used to indicate the presence of reserved resources in the first resource Conflict
  • the PSFCH transmission manner includes a sequence of resource conflict indications for indicating conflicting reserved resources, and/or, sending or not sending HARQ feedback.
  • a communication method includes: a second terminal device sends resource indication information and target data to a first terminal device, where the resource indication information is used to indicate a plurality of reserved resources reserved by the second terminal device , some or all of the multiple reserved resources belong to the first resource; if the reserved resources in the first resource conflict, the second terminal device receives the first physical side line Feedback channel PSFCH, the transmission mode of the first PSFCH is determined based on the association relationship between the first resource, the conflicting reserved resource and the transmission mode of PSFCH, wherein the first PSFCH carries the first A resource conflict indication and/or first HARQ feedback for the target data, the first resource conflict indication is used to indicate that there is a conflict in the reserved resources in the first resource, and the PSFCH transmission method includes a method for indicating The conflict indication of the conflicting reserved resources indicates occupied frequency domain units, and/or, sending or not sending HARQ feedback.
  • a communication method including: a second terminal device sends resource indication information and target data to a first terminal device, where the resource indication information is used to indicate multiple reserved resources reserved by the second terminal device,
  • the plurality of reserved resources include a first reserved resource; if there is a conflict in the first reserved resource, the second terminal device receives the first first physical side sent by the first terminal device
  • An online feedback channel PSFCH where the sending method of the first PSFCH is determined based on the first reserved resource as the retransmission resource or the initial transmission resource of the target data, wherein the sending method of the first PSFCH is included in
  • the first PSFCH carries a first resource conflict indication and/or first HARQ feedback for the target data, where the first resource conflict indication is used to indicate that there is a conflict in the first reserved resource.
  • a communication method including: a second terminal device sends resource indication information to the first terminal device within a first time domain unit, and the resource indication information is used to indicate that the second terminal device Target reserved resources in a domain unit; the second terminal device receives a resource conflict indication sent by the second terminal device on a third time domain unit, where the resource conflict indication is used to indicate that the resource conflict in the target reserved resource Conflicting reserved resources exist, wherein the position of the third time domain unit in the time domain is determined based on one or more of the following information: the position of the first time domain unit in the time domain; The position of the second time domain unit in the time domain; the time required for the first terminal device to decode the indication information; the time required for the first terminal device to prepare the resource conflict indication; the first terminal device The time required for the second terminal device to decode the resource conflict indication; and the time required for the second terminal device to prepare to transmit data on the reserved resource.
  • a first terminal device including: a receiving unit configured to receive resource indication information and target data, where the resource indication information is used to indicate multiple reserved resources reserved by a second terminal device, the Part or all of the multiple reserved resources belong to the first resource; if the reserved resources in the first resource conflict, the processing unit is configured to, based on the conflicting reserved resources and the physical side The association relationship between the transmission modes of the row feedback channel PSFCH, and determine the transmission mode of the first PSFCH associated with the first resource, wherein the first PSFCH carries the first resource conflict indication and/or is directed to the target
  • the first HARQ feedback of data the first resource conflict indication is used to indicate that there is a conflict in the reserved resources in the first resource
  • the transmission mode of the PSFCH includes a resource conflict indication for indicating that there is a conflict in the reserved resources sequence, and/or, to send or not to send HARQ feedback.
  • a first terminal device including: a receiving unit, configured to receive resource indication information and target data, where the resource indication information is used to indicate multiple reserved resources reserved by a second terminal device, the The plurality of reserved resources include a first reserved resource; in the case that the first reserved resource conflicts, the processing unit uses the first reserved resource as a retransmission resource or an initial transmission resource of the target data , determining a transmission manner of the first physical sidelink feedback channel PSFCH, wherein the transmission manner of the first PSFCH includes carrying a first resource conflict indication and/or a first HARQ for the target data in the first PSFCH Feedback, the first resource conflict indication is used to indicate that there is a conflict in the first reserved resource.
  • a first terminal device including: a receiving unit, configured to receive resource indication information sent by a second terminal device in a first time domain unit, where the resource indication information is used to indicate that the second The resource reserved by the target of the terminal device in the second time domain unit; a sending unit, configured to send a resource conflict indication to the second terminal device on a third time domain unit, where the resource conflict indication is used to indicate the target Conflicting reserved resources exist in the reserved resources, wherein the position of the third time domain unit in the time domain is determined based on one or more of the following information: the first time domain unit is in the time domain The position on the time domain; the position of the second time domain unit on the time domain; the time required for the first terminal device to decode the indication information; the time required for the first terminal device to prepare the resource conflict indication ; the time required for the second terminal device to decode the resource conflict indication; and the time required for the second terminal device to prepare to transmit data on the reserved resource.
  • a second terminal device including: a sending unit, configured to send resource indication information and target data to the first terminal device, where the resource indication information is used to indicate the resources reserved by the second terminal device A plurality of reserved resources, where part or all of the reserved resources belong to the first resource; if the reserved resources in the first resource conflict, the receiving unit is configured to receive the The first physical sidelink feedback channel PSFCH sent by the first terminal device, the sending method of the first PSFCH is based on the first resource, the conflict between the reserved resources and the sending method of the physical sidelink feedback channel PSFCH determined by the association relationship, wherein the first PSFCH carries a first resource conflict indication and/or a first HARQ feedback for the target data, and the first resource conflict indication is used to indicate There is a conflict in the reserved resources, and the PSFCH transmission method includes a sequence of resource conflict indications used to indicate the conflicting reserved resources, and/or, sending or not sending HARQ feedback.
  • a second terminal device including: a sending unit, configured to send resource indication information and target data to the first terminal device, where the resource indication information is used to indicate the resources reserved by the second terminal device Multiple reserved resources, some or all of the multiple reserved resources belong to the first resource; if the reserved resources in the first resource conflict, the receiving unit is configured to receive the first resource A physical sidelink feedback channel PSFCH, the transmission mode of the first PSFCH is determined based on the association relationship between the first resource, the conflicting reserved resources and the transmission mode of PSFCH, wherein the first PSFCH Carrying a first resource conflict indication and/or first HARQ feedback for the target data, the first resource conflict indication is used to indicate that there is a conflict in the reserved resources in the first resource, and the transmission mode of the PSFCH Include the frequency domain unit occupied by the conflict indication used to indicate that the reserved resources in conflict exist, and/or, send or not send HARQ feedback.
  • a second terminal device including: a sending unit, configured to send resource indication information and target data to the first terminal device, where the resource indication information is used to indicate multiple Reserved resources, where the plurality of reserved resources include a first reserved resource; if there is a conflict in the first reserved resources, the receiving unit is configured to receive the first first reserved resource sent by the first terminal device A physical sidelink feedback channel PSFCH, the transmission mode of the first PSFCH is determined based on the first reserved resource being the retransmission resource or the initial transmission resource of the target data, wherein the transmission of the first PSFCH
  • the manner includes carrying a first resource conflict indication and/or first HARQ feedback for the target data in the first PSFCH, where the first resource conflict indication is used to indicate that there is a conflict in the first reserved resource.
  • a second terminal device for communication including: a sending unit, configured to send resource indication information to the first terminal device within a first time domain unit, and the resource indication information is used to indicate the second terminal The resource reserved by the target of the device in the second time domain unit; the receiving unit is configured to receive a resource conflict indication sent by the second terminal device on the third time domain unit, and the resource conflict indication is used to indicate the target Conflicting reserved resources exist in the reserved resources, wherein the position of the third time domain unit in the time domain is determined based on one or more of the following information: the first time domain unit is in the time domain The position on the time domain; the position of the second time domain unit on the time domain; the time required for the first terminal device to decode the indication information; the time required for the first terminal device to prepare the resource conflict indication ; the time required for the second terminal device to decode the resource conflict indication; and the time required for the second terminal device to prepare to transmit data on the reserved resource.
  • a terminal device including a processor, a memory, and a communication interface, the memory is used to store one or more computer programs, and the processor is used to call the computer programs in the memory to make the terminal.
  • the device executes some or all of the steps in the methods of the above aspects.
  • an embodiment of the present application provides a communication system, where the system includes the above-mentioned first terminal device and/or second terminal device.
  • the system may further include other devices that interact with the terminal or network device in the solutions provided by the embodiments of the present application.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and the computer program causes a terminal to execute some or all of the steps in the methods of the above aspects.
  • the embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable the terminal to execute the above-mentioned Some or all of the steps in the methods of the various aspects.
  • the computer program product can be a software installation package.
  • an embodiment of the present application provides a chip, the chip includes a memory and a processor, and the processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects .
  • This application associates the conflicting reserved resources with the PSFCH transmission mode, so that the first terminal device can implicitly indicate the conflicting reserved resources to the second terminal device through the PSFCH transmission mode, which is beneficial to reduce the PFSCH
  • the number of bits required for the resource conflict indication avoids directly carrying the identifier of the conflicting reserved resource in the resource conflict indication, resulting in a large number of bits for the resource conflict indication.
  • Fig. 1 is a wireless communication system 100 applicable to the embodiment of the present application.
  • FIG. 2 is a schematic diagram of sideline resources occupied by the second-order SCI.
  • Figure 3 is a schematic diagram of a scene with hidden nodes.
  • Fig. 4 is a schematic diagram of a scenario where exposed terminals exist.
  • Fig. 5 is a schematic flow chart of the second manner of the resource allocation enhancement solution.
  • Fig. 6 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • Fig. 7 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • Fig. 8 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a communication method according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • FIG. 14 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • Fig. 15 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • FIG. 16 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • Fig. 17 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • Fig. 18 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • Fig. 1 is a wireless communication system 100 applicable to the embodiment of the present application.
  • the wireless communication system 100 may include a network device 110 and terminal devices 121 - 129 .
  • the network device 110 can provide communication coverage for a specific geographical area, and can communicate with terminal devices located in the coverage area.
  • terminal devices may communicate with each other through a sidelink (sidelink, SL).
  • Sidelink communication may also be called proximity services (Proximity services, ProSe) communication, unilateral communication, side chain communication, and device to device (D2D) communication.
  • ProSe proximity services
  • D2D device to device
  • sidelink data is transmitted between terminal devices through sidelinks.
  • the sidelink data may include data and/or control signaling.
  • the sidelink data may be, for example, a physical sidelink control channel (physical sidelink control channel, PSCCH), a physical sidelink shared channel (physical sidelink control channel, PSSCH), a PSCCH demodulation reference signal (demodulation reference signal, DMRS), PSSCH DMRS, physical sidelink feedback channel (feedback channel, PSFCH), etc.;
  • the terminal device performs sidelink communication within the coverage of the network device.
  • scenario 2 some terminal devices perform sidelink communication within the coverage of the network device.
  • scenario 3 the terminal device performs sidelink communication outside the coverage of the network device.
  • terminal devices 121-122 can communicate through sidelinks, and terminal devices 121-122 are all within the coverage of network device 110, or in other words, terminal devices 121-122 are all in within the coverage of the same network device 110.
  • the network device 110 may send configuration signaling to the terminal devices 121-122, and accordingly, the terminal devices 121-122 communicate through the sidelink based on the configuration signaling.
  • terminal devices 123 - 124 can communicate through sidelinks, and terminal device 123 is within the coverage of network device 110 , and terminal device 124 is outside the coverage of network device 110 .
  • the terminal device 123 receives the configuration information of the network device 110, and communicates through the sidelink based on the configuration of the configuration signaling. But for the terminal device 124, because the terminal device 124 is located outside the coverage of the network device 110, it cannot receive the configuration information of the network device 110.
  • the terminal device 124 can be configured based on the pre-configuration information and/or the configuration information sent by the terminal device 123 located within the coverage area, and obtain the configuration of the sidelink communication, so as to communicate with the terminal device 123 through the sidelink based on the obtained configuration.
  • the terminal device 123 may send the above configuration information to the terminal device 124 through a sidelink broadcast channel (physical sidelink broadcast channel, PSBCH), so as to configure the terminal device 124 to communicate through the sidelink.
  • a sidelink broadcast channel physical sidelink broadcast channel, PSBCH
  • the terminal devices 125 - 129 are located outside the coverage of the network device 110 and cannot communicate with the network device 110 .
  • both terminal devices can configure sidelink communication based on pre-configured information.
  • the terminal devices 127-129 located outside the coverage of the network device may form a communication group, and the terminal devices 127-129 in the communication group may communicate with each other.
  • the terminal device 127 in the communication group may serve as a central control node, also known as a cluster header terminal device (cluster header, CH).
  • cluster header cluster header
  • the terminal devices in other communication groups may be called "group members".
  • the terminal device 127 as a CH can have one or more of the following functions: responsible for the establishment of a communication group; joining and leaving of group members; performing resource coordination, allocating sideline transmission resources for group members, and receiving sideway feedback information from group members ; Functions such as resource coordination with other communication groups.
  • FIG. 1 exemplarily shows a network device and multiple terminal devices.
  • the wireless communication system 100 may include multiple network devices and the coverage of each network device may include other numbers terminal device, which is not limited in the embodiment of this application.
  • the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, for example: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system , LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc.
  • 5G fifth generation
  • NR new radio
  • long term evolution long term evolution
  • LTE frequency division duplex frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • future communication systems such as the sixth generation mobile communication system, and satellite communication systems, etc.
  • the terminal equipment in the embodiment of the present application may also be called user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) ), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.
  • the terminal device in the embodiment of the present application may be a device that provides voice and/or data connectivity to users, and can be used to connect people, objects and machines, such as handheld devices with wireless connection functions, vehicle-mounted devices, and the like.
  • the terminal device in the embodiment of the present application can be mobile phone (mobile phone), tablet computer (Pad), notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • UE can be used to act as a base station.
  • a UE may act as a scheduling entity, which provides sidelink data between UEs in V2X or D2D, etc.
  • a cell phone and a car communicate with each other using side-by-side data. Communication between cellular phones and smart home devices without relaying communication signals through base stations.
  • the network device in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be called an access network device or a wireless access network device, for example, the network device may be a base station.
  • the network device in this embodiment of the present application may refer to a radio access network (radio access network, RAN) node (or device) that connects a terminal device to a wireless network.
  • radio access network radio access network, RAN node (or device) that connects a terminal device to a wireless network.
  • the base station can broadly cover various names in the following, or replace with the following names, such as: Node B (NodeB), evolved base station (evolved NodeB, eNB), next generation base station (next generation NodeB, gNB), relay station, Access point, transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), primary station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node , wireless node, access point (access point, AP), transmission node, transceiver node, base band unit (base band unit, BBU), remote radio unit (Remote Radio Unit, RRU), active antenna unit (active antenna unit) , AAU), radio head (remote radio head, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning nodes, etc.
  • NodeB Node B
  • eNB evolved base station
  • next generation NodeB next generation NodeB
  • a base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof.
  • a base station may also refer to a communication module, modem or chip used to be set in the aforementioned equipment or device.
  • the base station can also be a mobile switching center, a device that undertakes the function of a base station in D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communication, and a device in a 6G network.
  • V2X vehicle-to-everything
  • M2M machine-to-machine
  • Base stations can support networks of the same or different access technologies. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
  • Base stations can be fixed or mobile.
  • a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station.
  • a helicopter or drone may be configured to serve as a device in communication with another base station.
  • the network device in this embodiment of the present application may refer to a CU or a DU, or, the network device includes a CU and a DU.
  • a gNB may also include an AAU.
  • Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the air.
  • the scenarios where the network device and the terminal device are located are not limited.
  • the communication system is required to realize the data interaction between the on-board devices. Therefore, higher requirements are put forward for the communication system. For example, the communication system is required to support higher throughput, lower delay, higher reliability, larger coverage, more flexible resource allocation, etc.
  • LTE-V2X terminal devices only support sidelink communication in broadcast mode.
  • NR-V2X unicast and multicast transmission methods are introduced.
  • the terminal device 121 and the terminal device 122 can communicate through unicast transmission mode, when the terminal device 121 sends the sidelink data through the sidelink, the terminal device 122 receives the sidelink data as the only receiving device .
  • the terminal devices receiving side data may be all terminal devices in a communication group, or the terminal devices receiving side data may be all terminal devices within a certain transmission distance.
  • the terminal devices receiving side data may be all terminal devices within a certain transmission distance.
  • FIG. 1 for a communication group including terminal devices 127-129, when terminal device 127 sends sideline data in a multicast manner, other terminal devices 128-129 in the communication group all receive the sideline data.
  • Row data receiving terminal equipment For another example, referring to FIG. 1 , assuming that the terminal devices within the preset range include terminal devices 127-129, when terminal device 127 sends sideline data in a multicast manner, other terminal devices 128-129 within the preset range All are receiving terminal devices that receive the sideline data.
  • the terminal device receiving the sidelink data may be any terminal device around the terminal device serving as the sending end.
  • the terminal device 125 is used as the sending end to broadcast sidelink data
  • the terminal equipment 121-124 and 126-129 located around the terminal device 125 can all be used as the receiving end of the sidelink data.
  • the 2nd-order SCI is introduced into NR-V2X, and the sidelink resources occupied by the 2nd-order SCI are introduced below in conjunction with Figure 2.
  • the first-order SCI is carried in the PSCCH.
  • the first-order SCI is used to indicate sidelink resources occupied by the PSSCH, reserved resource information, modulation and coding strategy (modulation and coding Scheme, MCS) level, priority and other information.
  • the second-order SCI can be transmitted in the PSSCH, and demodulated by using the DMRS of the PSSCH.
  • the PSCCH may occupy 3 symbols (symbols 1, 2, 3).
  • the second-order SCI can be mapped from the first DMRS symbol of the PSSCH, first in the frequency domain and then in the time domain.
  • the DMRS of the PSSCH occupies symbols 4 and 11.
  • the second-order SCI is mapped from symbol 4 and can be mapped all the way to symbol 6. Frequency division multiplexing with DMRS on symbol 4. Wherein, the side row resources occupied by the second-order SCI depend on the number of bits of the second-order SCI.
  • the second SCI can be used to indicate the ID of the sending end, the ID of the receiving end, the hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) ID, the new data indicator (new data indicator, NDI), etc. for data demodulated information.
  • Hybrid Automatic Repeat reQuest Hybrid Automatic Repeat reQuest, HARQ
  • NDI new data indicator
  • mode 1 two modes of resource allocation of sidelink resources, mode 1 and mode 2, are defined.
  • the network device schedules sidelink resources for the terminal device.
  • Mode 1 can be divided into two modes: dynamic resource allocation (dynamic resource allocation) and sidelink configured grant (SLCG).
  • dynamic resource allocation dynamic resource allocation
  • SLCG sidelink configured grant
  • the network device can allocate sidelink transmission resources for the terminal device by sending downlink control information (DCI).
  • DCI downlink control information
  • the terminal device can use the configured sidelink resources to transmit data without reapplying to the network device sideways resources. Therefore, the transmission delay of the sidelink can be reduced by adopting the resource configuration mode of configuring the grant.
  • Type 1 sidelink resource configuration is completely based on radio resource control (radio resource control, RRC) signaling.
  • Type 2 (Type2) configuration authorization the sidelink resource configuration in the communication system can be jointly configured by RRC signaling and layer 1 (layer 1, L1) signaling, where L1 signaling is used to indicate the activation and activation of RRC configuration go activate.
  • the network device may schedule sidelink resources for a single transmission for the terminal device. In other implementation manners, the network device may also configure semi-static sidelink resources for the terminal device.
  • terminal devices 121 - 123 are located within the coverage of the network device 110 , and the network device 110 may allocate sidelink resources for the terminal devices 121 - 123 .
  • the terminal device independently selects sidelink resources in the resource pool.
  • the process performed by the terminal device includes a resource detection process and/or a resource selection process.
  • the terminal device can identify the occupancy of sidelink resources by demodulating sidelink control information (sidelink control information, SCI).
  • the terminal device can also identify the occupancy of sidelink resources by measuring the received power of the sidelink.
  • the terminal devices 124-129 are located outside the coverage of the network device 110, and the terminal devices 124-129 can independently select sidelink resources in the mode 2 above.
  • the terminal device may use all available resources in the resource selection window as the resource set A.
  • the terminal device If the terminal device detects a physical sidelink control channel (physical sidelink control channel, PSCCH) within the listening window, it can measure the sensed PSCCH, and determine the available resources in the above resource set A based on the PSCCH measurement results .
  • a physical sidelink control channel physical sidelink control channel, PSCCH
  • the terminal device may measure the reference signal receiving power (reference signal receiving power, RSRP) of the PSCCH, or the terminal device may measure the RSRP of the physical sidelink shared channel (physical sidelink share channel, PSSCH) scheduled by the PSCCH. If the RSRP measured by the terminal device is greater than the SL-RSRP threshold and it is determined that the reserved resource indicated by the SCI transmitted in the PSCCH is within the resource selection window, the terminal device excludes the corresponding reserved resource from the resource set A.
  • reference signal receiving power reference signal receiving power
  • PSSCH physical sidelink share channel
  • the SL-RSRP threshold is raised by 3dB, and the above resource detection process is re-executed.
  • the possible values of the parameter X are ⁇ 20, 35, 50 ⁇ .
  • the terminal device may determine the parameter X from the value set of the parameter X according to the priority of the data to be sent.
  • the above SL-RSRP threshold is related to the priority carried in the PSCCH sensed by the terminal device and the priority of data to be sent by the terminal device.
  • the terminal device can use the value set of the "resource reservation period" field in the configuration of the resource pool used to reselect the sidelink resource of the corresponding time slot in the resource selection window to transmit the data to be sent.
  • the terminal device randomly selects several resources from the resource set A as resources for its initial transmission of new data (also known as “initial transmission resources”) or transmission resources for retransmission data (also known as “retransmission resource”).
  • the terminal device can independently select side resources in the resource pool based on the interception result.
  • problems such as hidden nodes (Hidden node), half-duplex (Half-duplex), exposed terminals, and high power consumption of terminal equipment.
  • Hidden node hidden nodes
  • Half-duplex Half-duplex
  • exposed terminals exposed terminals
  • high power consumption of terminal equipment high power consumption of terminal equipment.
  • Figure 3 is a schematic diagram of a scene with hidden nodes.
  • terminal device B needs to select sidelink resources according to the interception result, and use the selected sidelink resources to send sidelink data to terminal device A.
  • terminal device C also needs to select sidelink resources according to the interception result, and send sidelink data to terminal device A based on the selected sidelink resources.
  • terminal device B and terminal device C are far apart, the terminal device B and the terminal device C cannot detect the signals transmitted by each other.
  • terminal device B and terminal device C are each other's hidden nodes, so that terminal device B and terminal device C may select the same sidelink resource to send sidelink data to terminal device A, then terminal device C and Interference will occur between end devices B.
  • an end device cannot simultaneously transmit data and listen to sideline resources.
  • the terminal device listens in the listening window to select sidelink resources, the data to be sent needs to be sent on the target time slot in the listening window.
  • the terminal device cannot Therefore, based on the above introduction, for the sidelink resource corresponding to the target time slot that is not intercepted, no matter whether there are other terminal devices transmitting data on the sidelink resource, the terminal device needs to exclude all Outside the available resources, that is to say, the terminal device needs to exclude all sidelink resources corresponding to the target time slot in the resource selection window from the resource set A, so as to avoid interference with other terminals. In this way, the terminal device will exclude many sidelink resources that do not need to be excluded.
  • FIG. 4 shows a schematic diagram of a scenario where exposed terminals exist.
  • terminal device B needs to send sidelink data to terminal device A through sidelink resources.
  • terminal device A may be called a target receiving terminal of terminal device B.
  • Terminal device C needs to send sidelink data to terminal device D through sidelink resources.
  • terminal device D may be called a target receiving terminal of terminal device C.
  • terminal device B and terminal device C can monitor each other's sidelink signals during the process of listening to sidelink resources because they are relatively close. In this case, terminal device B and terminal device C are mutual The exposed terminals of the other party, terminal device B and terminal device C will not select the same sidelink resource.
  • the distance between the target receiving terminal A of the terminal device B and the terminal device C is relatively long, and the distance between the target receiving terminal D of the terminal device C and the terminal device B is relatively long, even if the terminal device B and the terminal device C use Sending their own sidelink data on the same sidelink resource will not interfere with the receiving sidelink data of their respective target receiving terminals, that is, due to the existence of exposed terminals, terminal device C and terminal device B cannot communicate on the same sidelink
  • Each sidelink data is transmitted on the resources, resulting in low utilization efficiency of sidelink resources.
  • the terminal device needs to continuously listen to sidelink resources to select its own available sidelink resources. Continuously listening to sidelink resources will consume a lot of energy of the terminal equipment, causing the terminal equipment to run out of power soon. This situation will reduce the user experience of terminal devices that cannot be charged anytime and anywhere, such as handheld terminals. Therefore, how to reduce the energy consumption of the terminal equipment is also a problem that needs to be considered in the resource detection process.
  • a resource allocation enhancement scheme in the sidelink is proposed to select sidelink resources at present.
  • the foregoing resource allocation enhancement scheme can be divided into the following two manners.
  • terminal device 1 may send a reference resource set to the terminal device performing resource interception (also known as “terminal device 2") to assist terminal device 2 in resource selection.
  • the sideline resources in the reference resource set are available sideline resources.
  • the above reference resource set may be a set of available resources obtained by the terminal device 1 according to an interception result, an instruction of a network device, and the like.
  • the foregoing reference resource set may also be available sidelink resources determined by the terminal device 1 according to the detected SCI.
  • terminal device 2 may preferentially select sidelink resources from the reference resource set to send sidelink data to terminal device 1 .
  • terminal device 2 can select appropriate sidelink resources in combination with the reference resource set sent by terminal device 1, which helps to avoid some problems in the above-mentioned mode 2, thereby improving Reliability of sideline data received by the target receiving terminal.
  • the above-mentioned terminal device 1 a "resource coordination terminal".
  • the above reference resource set may also include sidelink resources that are not suitable for use by the terminal device 2, so as to help the terminal device 2 exclude unavailable sidelink resources.
  • terminal device 1 may send resources to terminal device 1 through a physical sidelink feedback channel (PSFCH)
  • PSFCH physical sidelink feedback channel
  • the conflict indication also called “resource collision indication”
  • the terminal device 2 can know the conflicting reserved resources, and perform corresponding data retransmission or resource reselection.
  • the flow of the second way of the resource allocation enhancement solution is introduced below with reference to FIG. 5 .
  • Fig. 5 is a schematic flow chart of the second manner of the resource allocation enhancement solution.
  • the method shown in FIG. 5 includes step S510 and step S520.
  • step S510 the terminal device 1 detects whether there is a conflict in the reserved resources reserved by the terminal device 2.
  • the terminal device 1 may learn the reserved resources reserved by the terminal device 2 by receiving the first-order SCI sent by the terminal device 2 . If the terminal device 1 detects that there is a conflict in the reserved resource 1 reserved by the terminal device 2, the terminal device 1 may send a resource conflict indication to the terminal device 2 to indicate that there is a conflict in the reserved resource 1 .
  • step S520 terminal device 1 sends resource conflict indication 1 to terminal device 2 .
  • the above resource conflict indication 1 is used to indicate that there is a conflict in the reserved resource 1 .
  • step S530 the terminal device 2 performs data retransmission or resource reselection based on the resource conflict indication 1 .
  • the above resource conflict indication can be transmitted in PSFCH. Therefore, for the sake of easy understanding, the PSFCH supported in R16NR-V2X is used as an example to introduce the transmission mode of PSFCH.
  • the PSFCH that supports the sequence type in R16NR-V2X is called "PSFCH format 0".
  • the sequence type used by this type of PSFCH is the same as that of PUCCH format 0.
  • This type of PSFCH occupies one physical resource block (physical resource block, PRB) in the frequency domain, and occupies one orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol in the time domain.
  • sidelink resources used for transmitting PSFCH can be configured periodically with 1, 2 or 4 time slots. On the time slot where the PSFCH resource exists, the PSFCH resource is usually located on the last OFDM symbol available for sidelink transmission in the time slot.
  • the two OFDM symbols before the PSFCH symbol are used for transceiving conversion and AGC adjustment respectively.
  • PSCCH and PSSCH transmissions are not allowed on the above three OFDM symbols.
  • PSFCH is only used to carry HARQ feedback information, and the capacity of one PSFCH is usually one bit.
  • the sidelink resource occupied by the PSFCH is determined according to the time-frequency position of the transmission resource of the corresponding PSSCH.
  • the following two PSFCH resource determination methods are supported. Wherein, which PSFCH resource determination method is specifically adopted may be determined according to high-layer signaling configuration.
  • the PSFCH transmission resource can be determined according to the first subchannel of the PSSCH frequency domain resource.
  • PSFCH resource determination method 2 PSFCH transmission resources can be determined according to all sub-channels occupied by the PSSCH frequency domain.
  • PSFCH resource determination method 1 since the PSFCH transmission resource is only determined according to the first subchannel occupied by the PSSCH, no matter how many subchannels the PSSCH occupies, the number of sidelink resources occupied by the PSFCH for the PSSCH is fixed.
  • PSFCH resource determination mode 2 the number of transmission resources of PSFCH can be determined according to the number of sub-channels occupied by PSSCH. Therefore, the more sub-channels occupied by PSSCH, the more sidelink resources are correspondingly occupied by PSFCH of PSSCH. many.
  • PSSCH resource determination method 2 is more suitable for scenarios requiring more HARQ feedback resources.
  • the PSFCH resource set for PSSCH can be determined according to the time slot and subchannel occupied by PSSCH in resource collection
  • the indexes of the sidelink resources occupied by the PSFCH can be determined according to the order of resource blocks (resource block, RB) from low to high, and then according to the order of carriers (carrier space, CS) pairs from low to high.
  • PSFCH resources can be configured by SL-PSFCH-Config-r16 signaling (see the pseudo code shown below), where the "sl-PSFCH-Period-r16" field is used to configure the period of PSFCH resources; " The sl-PSFCH-RB-Set-r16” field is used to configure the PRB that can be used for PSFCH transmission on the OFDM symbol where the PSFCH resource is located; the "sl-NumMuxCS-Pair-r16” field is used to configure the cycle of the PFSCH sequence allowed in a PRB The number of shifts; the "sl-MinTimeGapPSFCH-r16” field is used to configure the minimum time interval between PSFCH and PSSCH associated with PSFCH; the "sl-PSFCH-HopID-r16” field is used to configure the frequency hopping ID of PSFCH. The ID is used to determine the PSFCH sequence; the "sl-PSFCH-CandidateResource
  • terminal device 1 when terminal device 1 (also known as “first terminal device”) detects that there is a conflict in the reserved resources of terminal device 2 (also known as “second terminal device”) , terminal device 1 may send a PSFCH (also called “first PSFCH”) to terminal device 2 to carry a resource conflict indication.
  • PSFCH also called “first PSFCH”
  • terminal device 1 may send a PSFCH (also called “first PSFCH”) to terminal device 2 to carry a resource conflict indication.
  • PSFCH also called “first PSFCH”
  • the capacity of PSFCH is usually only 1 bit . If the identifier of the conflicting reserved resource is directly carried in the resource conflict indication, the resource used for transmitting the PSFCH cannot carry the resource conflict indication and the HARQ feedback at the same time.
  • this application provides a communication method, by associating the conflicting reserved resources with the PSFCH transmission mode, implicitly indicating the conflicting reserved resources through the PSFCH transmission mode
  • the resources are reserved, which avoids directly carrying the identifier of the conflicting reserved resource in the resource conflict indication, resulting in a large number of bits of the resource conflict indication.
  • FIG. 6 is a schematic flowchart of the communication method of the embodiment of the present application.
  • the method shown in FIG. 6 includes steps S610 to S640.
  • step S610 the second terminal device sends resource indication information and target data to the first terminal device.
  • the foregoing resource indication information is used to indicate multiple reserved resources reserved by the second terminal device.
  • the above resource indication may be sent by the second terminal device through the SCI.
  • the specific sending method refer to the introduction about the SCI above, and for the sake of brevity, details are not repeated here.
  • step S620 in the case that there is a conflict in the reserved resources in the first resource, the first terminal device determines, based on the association between the conflicting reserved resources and the PSFCH transmission mode, which of the multiple reserved resources A transmission manner of the first PSFCH associated with conflicting reserved resources (also called "first resources").
  • the first resource may include one or more conflicting reserved resources.
  • the different reserved resources with conflict may include that the reserved resources with conflict are completely different reserved resources.
  • the PSFCH associated with reserved resource 1 The transmission mode is PSFCH transmission mode 1
  • the conflicting reserved resource is reserved resource 2
  • the PSFCH transmission mode associated with reserved resource 2 is PSFCH transmission mode 2
  • PSFCH transmission mode 1 is different from PSFCH transmission mode 2.
  • the aforementioned different conflicting reserved resources may include that the conflicting reserved resources are not completely the same reserved resources. For example, if the conflicting reserved resource is reserved resource 1, the PSFCH transmission mode associated with reserved resource 1 is PSFCH transmission mode 1. If the conflicting reserved resources are reserved resource 1 and reserved resource 2, the PSFCH transmission mode associated with reserved resource 1 and reserved resource 2 is PSFCH transmission mode 3, and PSFCH transmission mode 1 and PSFCH transmission mode 3 different.
  • the above-mentioned sending method of the first PSFCH may include sending or not sending the first PSFCH, and, in the case of sending the first PSFCH, the sending method of the first resource conflict indication carried in the first PSFCH and/or the HARQ method for the target data How feedback is sent.
  • the first resource conflict indication is used to indicate conflicting reserved resources among the plurality of reserved resources.
  • the HARQ feedback of the target data is used to indicate whether the first terminal device receives the target data correctly.
  • the sending method of the first resource conflict indication may include sending the sequence of the first resource conflict indication, sending the frequency domain unit (for example, PRB) occupied by the first resource conflict indication, etc., and the sending method of the HARQ feedback of the target data includes whether The first PSFCH carries HARQ feedback, and/or, whether the carried HARQ feedback is NACK or ACK.
  • the following will introduce in detail in conjunction with specific situations, and for the sake of brevity, details will not be repeated here.
  • step S630 the first terminal device transmits the first PSFCH to the second terminal device in a manner of transmitting the first PSFCH.
  • the above-mentioned first PSFCH may include multiple PSFCHs, and in some cases described below (for example, case 3-5 in Table 2; case 5 in Table 3; Mode 2 in Case 5)
  • the above-mentioned number of first PSFCHs may include 2 PSFCHs.
  • the above-mentioned number of first PSFCHs may include 2 PSFCHs .
  • the above-mentioned first PSFCH may also include 1 PSFCH, in some scenarios described below (for example, cases 1-5 in Table 1; cases 1-2 in Table 2; cases 1-4 and case 5 in Table 3 Mode 2 in Table 5; Case 1-4 in Table 5; Case 1-3, 5 in Table 6), the first terminal device only needs to feed back the first resource conflict indication or the first HARQ feedback, at this time, the first PSFCH May contain a PSFCH.
  • step S640 the second terminal device determines the first resource based on the transmission manner of the first PSFCH.
  • resource reselection may be performed based on preset rules, and data transmission may be performed on the reselected sidelink resources.
  • This embodiment of the present application does not specifically limit it.
  • the second terminal device may perform resource reselection based on the selection manner of the sidewalk resources introduced above.
  • the conflicting reserved resources are used for retransmission of the current data (for example, TB) (or the conflicting reserved resources are retransmission resources)
  • the second terminal device can retransmit the data through the reselected resources current data. If the conflicting reserved resources are used for the initial transmission of the next data (or the conflicting reserved resources are initial transmission resources), the second terminal device may send new data through the reselected resources.
  • the conflicting reserved resources may be distinguished through the transmission mode of the PSFCH.
  • each PSFCH transmission mode corresponds to a combination of the resource conflict indication transmission mode and the HARQ feedback transmission mode introduced above.
  • the communication method in the example of this application is introduced below through examples of different combinations.
  • the sending mode of the resource conflict indication includes sending the sequence of the resource conflict indication, and the sending mode of the HARQ feedback includes whether to send the HARQ feedback.
  • Combination mode 1 also includes two combination modes, which will be introduced in conjunction with combination modes 1-1 and 1-2 below.
  • the conflicting reserved resources among the plurality of reserved resources are different, the sequences of resource conflict indications are different.
  • different sequences may correspond to different conflicting reserved resources.
  • the conflicting reserved resources may be retransmission resources of target data, or initial transmission resources of new data, which is not limited in this embodiment of the present application.
  • the following uses a plurality of reserved resources including a first reserved resource and a second reserved resource as an example for introduction.
  • the first resource is the first reserved resource
  • the first PSFCH is sent in a manner of sending the first resource conflict indication in the first sequence and not sending the first HARQ feedback.
  • the first resource is the second reserved resource
  • the first PSFCH is sent in a manner of sending the first resource conflict indication in the second sequence and not sending the first HARQ feedback.
  • the first resource includes the first reserved resource and the second reserved resource
  • the first PSFCH is sent in a third sequence to send the first resource conflict indication.
  • the first terminal device may send ACK or NACK in the first PFSCH based on whether target data is received in a traditional HARQ feedback manner.
  • the second terminal device may further determine whether to send HARQ feedback in the first PSFCH.
  • the conflicting reserved resources are retransmission resources, and the first terminal device fails to receive the target data, at this time, the second terminal device is more concerned about whether the conflicting reserved resources which, therefore, in order to reduce resources occupied by the first PSFCH, the first terminal device may only send the first conflict indication information to the second terminal device without sending the first HARQ feedback.
  • the second terminal device may not send the first HARQ feedback to the first terminal device, that is, not send a NACK to the first terminal device.
  • the first resource is the retransmission resource of the target data
  • the first terminal device has successfully received the target data, that is, the purpose of the target data transmission has been achieved, at this time, the retransmission of the target data
  • the resource that is, the above-mentioned first resource
  • the first terminal device may not send The second terminal device sends the first PSFCH.
  • the HARQ feedback may be sent to the second terminal device through the PSFCH according to the traditional HARQ feedback manner.
  • the HARQ feedback may be sent to the second terminal device through the PSFCH according to the traditional HARQ feedback manner.
  • Table 1 shows the relationship between the conflicting reserved resources and the PSFCH transmission mode in the embodiment of the present application.
  • Table 2 shows the relationship between conflicting reserved resources and PSFCH transmission modes in another embodiment of the present application.
  • association relationship in Table 1 is applicable to the first terminal device being the target receiving terminal of the second terminal device
  • association relationship in Table 2 is applicable to the non-target receiving terminal where the first terminal device is the second terminal device terminal.
  • association relationship in Table 1 applies to the first terminal device being the non-target receiving terminal of the second terminal device
  • association relationship in Table 2 applies to the first terminal device being the target receiving terminal of the second terminal device.
  • the first terminal device may send the first HARQ feedback in the first PSFCH according to the traditional HARQ feedback sending manner.
  • the first terminal device may send an ACK to the second terminal device through the first PSFCH.
  • the first terminal device may not send the first HARQ feedback in the first PSFCH, or in other words, not send the first PSFCH.
  • the first terminal device can send the first PSFCH to the second terminal device , where only NACK is included in the first PSFCH.
  • the first terminal device may send the first PSFCH to the second terminal device, where the sequence of the first resource conflict indication in the first PSFCH is the first sequence.
  • the first terminal device may send the first PSFCH to the second terminal device, where the sequence of the first resource conflict indication in the first PSFCH is the second sequence.
  • the first terminal device may send the first PSFCH to the second terminal device, where the sequence of the first resource conflict indication in the first PSFCH is the third sequence.
  • the first terminal device if the first terminal device successfully receives the target data, it means that the purpose of transmitting the target data has been achieved. At this time, if the reserved resources 1 and 2 are retransmission resources, the second terminal device does not actually Concerned about whether the above retransmission resources conflict, if in order to reduce the overhead occupied by transmitting the first PSFCH, the first terminal device may not send the first PSFCH to the second terminal device.
  • the first terminal device may send the first HARQ feedback in the first PSFCH according to the traditional HARQ feedback sending manner.
  • the first terminal device may send an ACK to the second terminal device through the first PSFCH.
  • the first terminal device may not send the first HARQ feedback in the first PSFCH, or in other words, not send the first PSFCH.
  • the first terminal device can send the first PSFCH to the second terminal device , where only NACK is included in the first PSFCH.
  • the first terminal device may send the first PSFCH to the second terminal device, where the first PSFCH includes a NACK and a first sequence of first resource conflict indications.
  • the first terminal device may send the first PSFCH to the second terminal device, where the first PSFCH includes a NACK and a second sequence of first resource conflict indications.
  • the first terminal device may send the first PSFCH to the second terminal device, where the first PSFCH includes a NACK and a third sequence of first resource conflict indications.
  • the terminal device may not support sending HARQ feedback and resource conflict indication through PSFCH at the same time.
  • feedback For example, in the association relationship shown in Table 2 above, if the second terminal device does not support simultaneous transmission of the first HARQ feedback and the first resource conflict indication through the first PFSCH, then the second terminal device can only transmit the first HARQ feedback and the first resource conflict indication through the first PSFCH Send the first HARQ feedback.
  • the conflicting reserved resources may be retransmission resources of target data, or initial transmission resources of new data, which is not limited in this embodiment of the present application.
  • the following uses a plurality of reserved resources including reserved resource 1 and reserved resource 2 as an example to introduce.
  • the first resource is the first reserved resource
  • the first PSFCH is sent in a manner of sending the first resource conflict indication in the first sequence and not sending the first HARQ feedback.
  • the first resource is the second reserved resource
  • the first PSFCH is sent in a manner of sending the first resource conflict indication in the second sequence and not sending the first HARQ feedback.
  • the first terminal device may send ACK or NACK based on whether target data is received in a conventional HARQ feedback manner.
  • the second terminal device may further determine whether to send HARQ feedback in the first PSFCH.
  • the conflicting reserved resources are retransmission resources, and the first terminal device fails to receive the target data, at this time, the second terminal device is more concerned about whether the conflicting reserved resources which, therefore, in order to reduce resources occupied by the first PSFCH, the first terminal device may only send the first conflict indication information to the second terminal device without feeding back the first HARQ feedback.
  • the second terminal device may not send the first HARQ feedback to the first terminal device, that is, not send a NACK to the first terminal device.
  • the first resource is the retransmission resource of the target data
  • the first terminal device has successfully received the target data, that is, the purpose of the target data transmission has been achieved, at this time, the retransmission of the target data
  • the resource that is, the above-mentioned first resource
  • the first terminal device may not send The second terminal device sends the first PSFCH.
  • the resource conflict indication is sent in the first sequence to send the first resource conflict indication, and the sending mode of the HARQ feedback is to send the HARQ feedback.
  • the first terminal device if the first terminal device supports ACK/NACK-based HARQ feedback, the first HARQ feedback fed back by the first terminal device is NACK, that is, the first terminal device can send the first PSFCH to the second terminal device , wherein the first PSFCH includes a first sequence of first resource conflict indications and a NACK.
  • the first terminal device if the first terminal device supports NACK-only based HARQ feedback, the first terminal device needs to feed back the first sequence of first resource conflict indications and ACK to the second terminal device. Because in this NACK-only based HARQ feedback scenario, the receiving end of the target data (including the target receiving terminal and the non-target receiving terminal of the first terminal device) is sent to the second terminal device through the same sidelink resource.
  • the second terminal device cannot distinguish which terminal device is the sending end of the NACK, that is, once a terminal device fails to receive the target data, it will send a NACK to the second terminal device.
  • the second terminal After the device receives the first sequence of resource conflict indications sent by the first terminal device (that is, case 1 in combination mode 1-2), the second terminal device will not be able to distinguish between case 1 and case 3. Therefore, in order to avoid this In this case, it is necessary to configure the first terminal device to send an ACK to the second terminal device even if it fails to receive the target data in case 3, so as to distinguish it from case 1 in combination mode 1-2.
  • the sequence indicating the ACK in the ACK/NACK-based HARQ feedback can be directly used to feed back the ACK.
  • other sequences can also be used to indicate the ACK , which is not limited in this embodiment of the present application.
  • the above-mentioned first PSFCH may send the first PSFCH to the second terminal device in a traditional HARQ feedback manner.
  • the above-mentioned first PSFCH may send the first PSFCH to the second terminal device in a traditional HARQ feedback manner.
  • the communication method according to the embodiment of the present application is introduced below in combination with Table 3, taking the reserved resource with conflict as the retransmission resource as an example.
  • Table 3 shows the relationship between conflicting reserved resources and PSFCH transmission modes in another embodiment of the present application.
  • the first terminal device may send the first HARQ feedback in the first PSFCH according to the traditional HARQ feedback sending manner.
  • the first terminal device may send an ACK to the second terminal device through the first PSFCH.
  • the first terminal device may not send the first HARQ feedback in the first PSFCH, or in other words, not send the first PSFCH.
  • the first terminal device can send the first PSFCH to the second terminal device , where only NACK is included in the first PSFCH.
  • the first terminal device may send the first PSFCH to the second terminal device, where the sequence of the first resource conflict indication in the first PSFCH is the first sequence.
  • the first terminal device may send the first PSFCH to the second terminal device, where the sequence of the first resource conflict indication in the first PSFCH is the second sequence.
  • scenario 2 if the first terminal device supports NACK-only based HARQ feedback, the first terminal device needs to feed back the first sequence of first resource conflict indications and ACK to the second terminal device.
  • the first terminal device needs to feed back the first sequence of first resource conflict indications and ACK to the second terminal device.
  • the first terminal device if the first terminal device successfully receives the target data, it means that the purpose of transmitting the target data has been achieved. At this time, if the reserved resources 1 and 2 are retransmission resources, the second terminal device does not actually Concerned about whether the above retransmission resources conflict, if in order to reduce the overhead occupied by transmitting the first PSFCH, the first terminal device may not send the first PSFCH to the second terminal device.
  • the association relationship shown in Table 3 can be applied to the target receiving terminal of the second terminal device.
  • the non-target receiving terminal device of the second terminal device can adopt the association relationship shown in Table 2 .
  • the target receiving terminal of the second terminal device may also adopt the association relationship shown in Table 2, and at this time, the non-target receiving terminal of the second terminal device may adopt the association relationship shown in Table 3.
  • the first terminal device will send the first HARQ feedback and the first resource to the second terminal device Conflict indications, for example, case 5 in Table 3 and cases 3 to 5 in Table 2, at this time, in order to facilitate the second terminal device to distinguish whether the sender of the first PSFCH is a target receiving terminal or a non-target receiving terminal, to determine whether When the target data needs to be retransmitted, it can be configured that when the target receiving terminal needs to transmit HARQ feedback, the sequence of the HARQ feedback is the same as the sequence of the resource conflict indication.
  • the sequence of the HARQ feedback and the sequence of the resource conflict indication can be configured Are not the same.
  • the above sequence may be generated in a cyclic shift manner.
  • the above sequence can be obtained by the formula Determine, where ⁇ represents the number of cyclic shifts; Indicates the number of subcarriers contained in one RB, usually, The value of m is 12; m 0 can be predefined by the standard, or configured or pre-configured by the network; Indicates a random number determined according to the transmission time slot and transmission symbol of the conflict indication sequence; the value of m cs is determined based on the sequence to be generated, or m cs represents the identifier of the sequence to be generated.
  • the value of mcs can be 0; if the sequence to be generated is the second sequence, the value of mcs can be 1; if the sequence to be generated is the third sequence, The value of m cs can be 3.
  • the association relationship between the PSFCH transmission mode and conflicting reserved resources adopts three sequences, correspondingly, code division multiplexing is allowed in a frequency domain unit (for example, PRB) configured in the PSFCH resource pool.
  • the sequence logarithm should not be less than 2.
  • the conflicting reserved resources indicated by the two resource conflict indications will include some identical reserved resources.
  • reserved resource 1 is earlier than reserved resource 2 in the time domain
  • reserved resource 2 is earlier than reserved resource 1 in the time domain
  • the conflicting reserved resources are indicated as the reserved resource 1 and the reserved resource 2
  • the conflicting reserved resources are indicated as the reserved resource 2 and the reserved resource 3.
  • the reserved resource 2 is indicated twice in the resource conflict indication 1 and the resource conflict indication 2 respectively.
  • the conflicting reserved resource 2 may not be indicated in the resource conflict indication 1, because the conflict in the reserved resource 2 will be indicated again in the resource conflict indication 2 . That is, in the case that there is no conflict in the first reserved resource and there is conflict in the second reserved resource, the first terminal device does not send the first PSFCH to the second terminal device, where the second reserved resource is located at the second reserved resource in the time domain. After reserving resources. That is to say, in case 4 shown in Table 1 to Table 3, the first PSFCH is sent in the manner of not sending the first PSFCH.
  • the first terminal device may send the first HARQ feedback in the first PSFCH according to the traditional HARQ feedback sending manner.
  • the first terminal device may send an ACK to the second terminal device through the first PSFCH.
  • the first terminal device may not send the first HARQ feedback in the first PSFCH, or in other words, not send the first PSFCH.
  • the first terminal device can send the first PSFCH to the second terminal device , where only NACK is included in the first PSFCH.
  • the HARQ feedback of the target data is NACK for the first terminal device, and there is a conflict between reserved resource 1 and reserved resource 2 (that is, the above-mentioned first resource is reserved resource 1 and reserved resource 2) , then in mode 1, if the first terminal device supports ACK/NACK-based HARQ feedback, the HARQ feedback fed back by the first terminal device is NACK, that is, the first terminal device can send the first PSFCH to the second terminal device , wherein the first PSFCH includes a first sequence of first resource conflict indications and a NACK. If the first terminal device supports NACK-only based HARQ feedback, the first terminal device needs to feed back the first sequence of first resource conflict indications and ACK to the second terminal device. For the specific configuration reasons, please refer to the introduction above. For the sake of brevity, details will not be repeated here. In manner 2, the first terminal device may send a second sequence of resource conflict indications.
  • the transmission mode of the resource conflict indication includes the frequency domain unit occupied by the resource conflict indication, and the transmission mode of the HARQ feedback includes whether to provide HARQ feedback.
  • conflicting reserved resources among the plurality of reserved resources are different, frequency domain units occupied by resource conflict indications are different.
  • different frequency domain units may correspond to different conflicting reserved resources.
  • the conflicting reserved resources may be retransmission resources of target data, or initial transmission resources of new data, which is not limited in this embodiment of the present application.
  • the following uses a plurality of reserved resources including a first reserved resource and a second reserved resource as an example for introduction.
  • the first resource is the first reserved resource
  • the first PSFCH is sent by sending the first resource conflict indication in the first frequency domain unit.
  • the first resource is the second reserved resource
  • the first PSFCH is sent by sending the first resource conflict indication in the second frequency domain unit.
  • the first resource includes the first reserved resource and the second reserved resource
  • the first PSFCH is sent in a manner of sending the first resource conflict indication by the first frequency domain unit and the second frequency domain unit.
  • the first terminal device may send ACK or NACK based on whether target data is received according to a traditional HARQ feedback manner.
  • the second terminal device may further determine whether to send HARQ feedback in the PSFCH.
  • the conflicting reserved resources are retransmission resources, and the first terminal device fails to receive the target data, at this time, the second terminal device is more concerned about whether the conflicting reserved resources Therefore, in order to reduce resources occupied by the PSFCH, the first terminal device may only send the first conflict indication information to the second terminal device without feeding back HARQ feedback.
  • the second terminal device may not send HARQ feedback to the first terminal device, that is, not send NACK to the first terminal device.
  • the first resource is the retransmission resource of the target data
  • the first terminal device has successfully received the target data, that is, the purpose of the target data transmission has been achieved, at this time, the retransmission of the target data
  • the resource that is, the above-mentioned first resource
  • the first terminal device may not send the resource to the second terminal device.
  • the terminal device sends the first PSFCH.
  • the first PSFCH may be sent to the second terminal device in a traditional HARQ feedback manner.
  • the first PSFCH may be sent to the second terminal device in a traditional HARQ feedback manner.
  • Table 5 shows the relationship between the conflicting reserved resources and the PSFCH transmission mode in the embodiment of the present application.
  • Table 6 shows the relationship between conflicting reserved resources and PSFCH transmission modes in another embodiment of the present application.
  • association relationship in Table 5 is applicable to the first terminal device being the target receiving terminal of the second terminal device
  • association relationship in Table 6 is applicable to the non-target receiving terminal where the first terminal device is the second terminal device terminal.
  • association relationship in Table 5 applies to the first terminal device being the non-target receiving terminal of the second terminal device
  • association relationship in Table 6 applies to the first terminal device being the target receiving terminal of the second terminal device.
  • the first terminal device may send the first HARQ feedback in the first PSFCH according to the traditional HARQ feedback sending manner.
  • the first terminal device may send an ACK to the second terminal device through the first PSFCH.
  • the first terminal device may not send the first HARQ feedback in the first PSFCH, or in other words, not send the first PSFCH.
  • the first terminal device can send the first PSFCH to the second terminal device , where only NACK is included in the first PSFCH.
  • the first terminal device may send the first PSFCH to the second terminal device, where the first resource conflict indication in the first PSFCH occupies the first frequency domain unit.
  • the first terminal device may send the first PSFCH to the second terminal device, where the first resource conflict indication in the first PSFCH occupies the second frequency domain unit.
  • the first terminal device may send the first PSFCH to the second terminal device, where the first resource conflict indication in the first PSFCH occupies the first frequency domain unit and the second frequency domain unit.
  • the first terminal device if the first terminal device successfully receives the target data, it means that the purpose of transmitting the target data has been achieved. At this time, if the reserved resources 1 and 2 are retransmission resources, the second terminal device does not actually Concerned about whether there is a conflict in the retransmission resources above, if in order to reduce the overhead occupied by transmitting the PSFCH, the first terminal device may not send the first PSFCH to the second terminal device.
  • the conflicting reserved resources indicated by the two resource conflict indications will include some identical reserved resources.
  • reserved resource 1 is earlier than reserved resource 2 in the time domain
  • reserved resource 2 is earlier than reserved resource 1 in the time domain
  • the conflicting reserved resources are indicated as the reserved resource 1 and the reserved resource 2
  • the conflicting reserved resources are indicated as the reserved resource 2 and the reserved resource 3.
  • the reserved resource 2 is indicated twice in the resource conflict indication 1 and the resource conflict indication 2 respectively.
  • the conflicting reserved resource 2 may not be indicated in the resource conflict indication 1, because the conflict in the reserved resource 2 will be indicated again in the resource conflict indication 2 . That is, in the case that there is no conflict in the first reserved resource and there is conflict in the second reserved resource, the first terminal device does not send the first PSFCH to the second terminal device, where the second reserved resource is located at the second reserved resource in the time domain. After reserving resources. That is to say, in case 4 shown in Table 5, the first PSFCH is sent in the manner of not sending the first PSFCH.
  • the first terminal device may send the first HARQ feedback in the first PSFCH according to the traditional HARQ feedback sending manner.
  • the first terminal device may send an ACK to the second terminal device through the first PSFCH.
  • the first terminal device may not send the first HARQ feedback in the first PSFCH, or in other words, not send the first PSFCH.
  • the first terminal device can send the first PSFCH to the second terminal device , where only NACK is included in the first PSFCH.
  • the first terminal device may send the first PSFCH to the second terminal device, where the first resource conflict indication in the first PSFCH occupies the first frequency domain unit.
  • the first terminal device may not send the first PSFCH to the second terminal device.
  • the first terminal device may send the first PSFCH to the second terminal device, where the first resource conflict indication in the first PSFCH occupies the second frequency domain unit.
  • the first terminal device if the first terminal device successfully receives the target data, it means that the purpose of transmitting the target data has been achieved. At this time, if the reserved resources 1 and 2 are retransmission resources, the second terminal device does not actually Concerned about whether the above retransmission resources conflict, if in order to reduce the overhead occupied by transmitting the first PSFCH, the first terminal device may not send the first PSFCH to the second terminal device.
  • the method shown in combination mode 2 described above may be applicable to the target receiving terminal of the second terminal device or the non-target receiving terminal of the second terminal device, which is not limited in this embodiment of the present application.
  • the two types of terminal devices may be configured to send the first PSFCH on different frequency domain units.
  • the frequency domain unit may not be distinguished.
  • terminal device 1 when terminal device 1 (also known as “first terminal device”) detects that there is a conflict in the reserved resources of terminal device 2 (also known as “second terminal device”) , terminal device 1 may send a PSFCH (also called “first PSFCH”) to terminal device 2 to carry a resource conflict indication.
  • PSFCH also called “first PSFCH”
  • terminal device 1 may send a PSFCH (also called “first PSFCH”) to terminal device 2 to carry a resource conflict indication.
  • PSFCH also called “first PSFCH”
  • the capacity of PSFCH is usually only 1 bit . If the identifier of the conflicting reserved resource is directly carried in the resource conflict indication, the resource used for transmitting the PSFCH cannot carry the resource conflict indication and the HARQ feedback at the same time.
  • the present application provides a communication method, which can determine the transmission mode of the first PFSCH based on whether the conflicting reserved resources are retransmission resources or initial transmission resources of target data.
  • the following describes a communication method in another embodiment of the present application with reference to FIG. 7 .
  • Fig. 7 is a schematic flowchart of a communication method according to an embodiment of the present application. The method shown in FIG. 7 includes steps S710 to S740.
  • step S710 the second terminal device sends resource indication information and target data to the first terminal device.
  • the resource indication information is used to indicate multiple reserved resources reserved by the second terminal device, and the multiple reserved resources include the first reserved resource.
  • step S720 if there is a conflict in the first reserved resource, the first terminal device determines the transmission of the first physical sidelink feedback channel PSFCH based on the first reserved resource being the retransmission resource or the initial transmission resource of the target data Way.
  • the sending method of the first PSFCH includes sending the first PSFCH and not sending the first PSFCH, and, when sending the first PSFCH, the sending method of the first PSFCH further includes carrying the first resource conflict indication and /or for the first HARQ feedback of the target data, the first resource conflict indication is used to indicate that there is a conflict in the first reserved resource.
  • the above-mentioned first reserved resource may meet any one of the following conditions: the first reserved resource is the next side row for target data retransmission reserved by the second terminal device through the resource indication information resource.
  • the first reserved resource is the sidelink resource closest to the time domain unit occupied by the first resource indication information in the time domain among the multiple reserved resources.
  • the first reserved resource is a retransmission resource that may be the target data Or the initially uploaded resource, which is not limited in this embodiment of the present application.
  • step S730 the first terminal device transmits the first PFSCH to the second terminal device in a manner of transmitting the first PSFCH.
  • first PSFCH may include multiple PSFCHs.
  • the above-mentioned number of first PSFCHs may include 2 PSFCHs.
  • the above-mentioned first PSFCH may also include one PSFCH.
  • the first terminal device only needs to feed back the first resource conflict indication or first HARQ feedback, at this time, the first PSFCH may include one PSFCH.
  • step S740 the second terminal device determines the conflicting reserved resource (ie, the first reserved resource) based on the transmission manner of the first PSFCH.
  • resource reselection may be performed based on preset rules, and data transmission may be performed on the reselected sidelink resources. This embodiment of the present application does not specifically limit it. If the second terminal device determines that there are conflicting reserved resources, the second terminal device may perform resource reselection and data transmission based on the sidelink resource selection method introduced above in combination with the HARQ feedback of the first terminal device. In some implementations, if the first PSFCH carries the first resource conflict indication and the first HARQ feedback is ACK, and the conflicted reserved resource (that is, the first reserved resource) is the retransmission resource of the target data, then the first The second terminal device can stop sending the target data.
  • the second terminal device may perform resource reselection, and transmit target data through the reselected reserved resources.
  • the first PSFCH carries the first resource conflict indication, and the conflicting reserved resource is an initial transmission resource, no matter whether the first terminal device successfully receives the target data, the second terminal device performs Resource reselection, and send new data through the reselected sideline resources.
  • the conflicting reserved resource is the initial transmission resource, it means that the transmission process of the target data has ended.
  • the second terminal device does not care whether the first terminal device The target data is successfully received. Therefore, in order to reduce the sidelink resources occupied by the first PSFCH, the second terminal device can be configured to only carry the first resource conflict indication in the first PSFCH sent to the first terminal device without carrying HARQ feedback. .
  • the first PSFCH is sent by carrying the first resource conflict indication in the first PSFCH.
  • the first PSFCH is sent by carrying the first resource conflict indication in the first PSFCH.
  • the first terminal device fails to receive the target data, and the conflicting reserved resource is the retransmission resource of the target data, then in this case, since the second terminal device needs to receive the target data based on the first terminal device to determine whether to retransmit the target data. At this time, the first terminal device needs to carry the first HARQ feedback and the first resource conflict indication in the first PSFCH.
  • the first PSFCH is sent by carrying the first resource conflict indication and the first resource conflict indication in the first PSFCH. HARQ feedback.
  • the first terminal device If the first terminal device successfully receives the target data, then the purpose of transmitting the target data by the first terminal device has been completed. For the second terminal device, it does not care whether there is a conflict in the retransmission resource of the target data. In this case, in order to reduce sidelink resources occupied by the first PSFCH, the first terminal device may not send the first PSFCH to the second terminal device.
  • association relationship in Table 7 is applicable to the first terminal device being the target receiving terminal of the second terminal device
  • association relationship in Table 8 is applicable to the non-target receiving terminal where the first terminal device is the second terminal device terminal.
  • association relationship in Table 7 applies to the first terminal device being the non-target receiving terminal of the second terminal device
  • association relationship in Table 8 applies to the first terminal device being the target receiving terminal of the second terminal device.
  • the first terminal device may send the first HARQ feedback in the first PSFCH according to the traditional HARQ feedback sending manner.
  • the first terminal device may send an ACK to the second terminal device through the first PSFCH.
  • the first terminal device may not send the first HARQ feedback in the first PSFCH, or in other words, not send the first PSFCH.
  • the first A terminal device may send a first PSFCH to a second terminal device, where there is only a first resource conflict indication in the first PSFCH, and the first resource conflict indication is used to indicate that there is a conflict in reserved resource 1 .
  • the first terminal device can send the first PSFCH to the second terminal device, where the first PSFCH is only Carry NACK.
  • the HARQ feedback of the target data is NACK for the first terminal device, and there is a conflict in reserved resource 1 (that is, the above-mentioned first reserved resource is reserved resource 1)
  • the first PSFCH sent by the first terminal device to the second terminal device carries the first resource conflict indication and NACK.
  • the reserved resource 1 is an initial transmission resource, only the first resource conflict indication is carried in the first PSFCH sent by the first terminal device to the second terminal device.
  • the first terminal device if it successfully receives the target data, it means that the purpose of transmitting the target data has been achieved. At this time, if the reserved resource 1 is a retransmission resource, the second terminal device actually does not care about the above retransmission resource Whether there is a conflict, if in order to reduce the overhead occupied by transmitting the PSFCH, the first terminal device may not send the first PSFCH to the second terminal device.
  • the first terminal device may send the first HARQ feedback in the first PSFCH according to the traditional HARQ feedback sending manner.
  • the first terminal device may send an ACK to the second terminal device through the first PSFCH.
  • the first terminal device may not send the first HARQ feedback in the first PSFCH, or in other words, not send the first PSFCH.
  • the first terminal device may send the first PSFCH to the second terminal device, Wherein the first PSFCH contains only the first resource conflict indication, and the first resource conflict indication is used to indicate that there is a conflict in the reserved resource 1 .
  • the first terminal device can send the first PSFCH to the second terminal device, where the first PSFCH is only Carry NACK.
  • the second terminal device can be configured to only carry First HARQ feedback.
  • the first terminal device if it successfully receives the target data, it means that the purpose of transmitting the target data has been achieved. At this time, if the reserved resource 1 is a retransmission resource, the second terminal device actually does not care about the above retransmission resource Whether there is a conflict, if in order to reduce the transmission overhead occupied by the first PSFCH, the first terminal device may not send the first PSFCH to the second terminal device.
  • terminal device 1 when terminal device 1 (also known as “first terminal device”) detects that there is a conflict in the reserved resources of terminal device 2 (also known as “second terminal device”) , terminal device 1 may send a PSFCH to terminal device 2 to carry a resource conflict indication.
  • terminal device 1 may send a PSFCH to terminal device 2 to carry a resource conflict indication.
  • the first terminal device may not have time to decode the resource indication information, that is, it cannot confirm the reserved resources of the second terminal device, and thus cannot judge the reserved resources. Whether there is a conflict on the resource.
  • the second terminal device may not be able to decode the resource conflict indication in time, and cannot determine whether there is a conflict on the reserved resource.
  • the embodiment of the present application also provides a communication method to reasonably plan the time domain units occupied by resource indication information, the time domain units occupied by resource conflict indications, and the time domain units where reserved resources are located. time-domain positional relationship.
  • the following describes the flow of the communication method in the embodiment of the present application with reference to FIG. 8 .
  • the method shown in FIG. 8 includes step S810 and step S820. It should be noted that the communication method shown in FIG. 8 can be used in combination with any communication method introduced above, and for the sake of brevity, details will not be described in detail below.
  • step S810 the second terminal device sends resource indication information to the first terminal device within the first time domain unit.
  • the resource indication information is used to indicate one or more reserved resources of the second terminal device in the second time domain unit.
  • the above resource indication information may be sent through SCI.
  • the foregoing resource indication information may be the first resource indication information introduced in FIG. 6 and FIG. 7 above.
  • step S820 the first terminal device sends a resource conflict indication to the second terminal device on a third time domain unit.
  • the foregoing resource conflict indication is used to indicate that conflicting reserved resources exist among the plurality of reserved resources.
  • the above resource conflict indication may be sent through PFSCH.
  • the foregoing resource indication information may be the first resource conflict indication introduced in FIG. 6 and FIG. 7 above.
  • the position of the third time domain unit in the time domain is determined based on one or more of the following information: the position of the first time domain unit in the time domain; the position of the second time domain unit in the time domain; The time required for the first terminal device to decode the resource indication information; the time required for the first terminal device to prepare the resource conflict indication; the time required for the second terminal device to decode the resource conflict indication; and the time required for the second terminal device to prepare on the reserved resources The time required to transfer data.
  • the interval between the third time domain unit and the first time domain unit in the time domain may be based on the time required for the first terminal device to prepare the resource conflict indication and the time required for the first terminal device to decode the resource indication information.
  • the time is fixed.
  • the time interval between the third time domain unit and the first time domain unit is not less than (greater than or equal to) the time required for the first terminal device to prepare the resource conflict indication and the time required for the first terminal device to decode the resource indication information. sum of time.
  • the interval between the third time domain unit and the second time domain unit in the time domain may be based on the time required for the second terminal device to decode the resource conflict indication and the time the second terminal device is prepared to use on the reserved resources.
  • the time required to transfer data is determined.
  • the interval between the third time domain unit and the second time domain unit in the time domain is not less than (or in other words, greater than or equal to) the time required for the second terminal device to decode the resource conflict indication and the second terminal device is prepared to The sum of the time required to transfer data on reserved resources.
  • the time interval between the above two time domain units may be the time interval between the middle positions of the two time domain units, or the time interval between the end position of the first time domain unit and the second time domain unit.
  • the time interval between the starting positions of the units is not limited in this embodiment of the present application.
  • the time interval between the third time domain unit and the first time domain unit may be the time interval between the end position of the first time domain unit and the start position of the third time domain unit.
  • the interval between the third time domain unit and the second time domain unit in the time domain may be the time interval between the end position of the third time domain unit and the start position of the second time domain unit.
  • the time required for decoding the first PSFCH can be based on the time required for the second terminal device to decode the sidelink control information SCI specified in the current protocol The time is fixed.
  • the conflicting reserved resources indicated by the above resource conflict indication information may be determined according to preset rules, or may be specified by network devices, which is not limited in this embodiment of the present application. .
  • the conflicting reserved resources may meet any of the following conditions: at least part of the reserved resources are initial transmission resources; at least part of the reserved resources are The reserved resources are retransmission resources; the multiple reserved resources belong to the resource set reserved by the second terminal device indicated by the resource indication information, and the distance between each of the multiple reserved resources and the time-frequency resources occupied by the resource indication information The distance is smaller than the first distance, and the first distance is the distance between other reserved resources in the resource set except for the plurality of reserved resources and the time-frequency resource occupied by the resource indication information.
  • first time domain unit, the second time domain unit, and the third time domain unit may be any units in the time domain, for example, may be time slots, subframes, symbols, and so on.
  • the following describes the communication method in the embodiment of the present application by taking the time domain unit as a time slot as an example with reference to FIG. 9 .
  • the first time domain unit occupied by the resource indication information is time slot n
  • the second time domain unit occupied by the resource conflict indication is time slot m
  • the third time domain unit occupied by conflicting reserved resources is time slot n.
  • time slot n is located before time slot f in the time domain, and time slot f is located before time slot m in the time domain, then, according to the above-mentioned interval between the three in the time domain is: time slot n
  • the interval between the end position of and the start position of time slot f is greater than or equal to time interval 1, wherein the time length of time interval 1 is the time required for the first terminal device to prepare the resource conflict indication and the first terminal device to decode the resource indication The sum of the time required for the information.
  • the interval between the end position of time slot f and the start position of time slot m is greater than or equal to time interval 2, wherein the time length of time interval 2 is the time required for the second terminal device to decode the resource conflict indication and the second terminal device The sum of the time required to prepare data for transfer on reserved resources.
  • FIG. 10 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device shown in FIG. 10 can implement the corresponding functions of the above-mentioned first terminal device.
  • the terminal device 1000 shown in FIG. 10 can implement the corresponding functions of the above-mentioned first terminal device.
  • the terminal device 1000 shown in FIG. 10 can implement the corresponding functions of the above-mentioned first terminal device.
  • the receiving unit 1010 is configured to receive resource indication information and target data, the resource indication information is used to indicate a plurality of reserved resources reserved by the second terminal device, and part or all of the plurality of reserved resources are reserved resources belongs to the first resource.
  • the processing unit 1020 is configured to determine the relationship between the conflicting reserved resources and the transmission mode of the physical sidelink feedback channel PSFCH based on the A manner of sending the first PSFCH associated with the first resource, wherein the first PSFCH carries a first resource conflict indication and/or a first HARQ feedback for the target data, and the first resource conflict indication is used to indicate There is a conflict in the reserved resources in the first resource, and the sending manner of the PSFCH includes a sequence of resource conflict indications for indicating conflicting reserved resources, and/or, sending or not sending HARQ feedback.
  • the sequence carrying the resource conflict indication is the same as the sequence carrying the first HARQ feedback.
  • the first terminal device fails to receive the target data and the first resource is the first reserved resource, the first PSFCH is sent in the first Sequentially send the first resource conflict indication and not send the first HARQ feedback.
  • the first terminal device fails to receive the target data and the first resource is the second reserved resource, the first PSFCH is sent in the second sending the first resource conflict indication in a sequence without sending the first HARQ feedback, wherein the second sequence is different from the first sequence.
  • the The first PSFCH is sent in a manner of sending the first resource conflict indication in a third sequence.
  • the The first PSFCH is sent in a manner of sending the first resource conflict indication and sending the first HARQ feedback in a first sequence.
  • the first HARQ feedback is NACK-based HARQ feedback only, and the first HARQ feedback is ACK.
  • the reserved resource in the first resource is a retransmission resource of the target data.
  • FIG. 11 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device shown in FIG. 11 can implement the corresponding functions of the above-mentioned first terminal device.
  • the terminal device 1100 shown in FIG. 11 can implement the corresponding functions of the above-mentioned first terminal device.
  • the terminal device 1100 shown in FIG. 11 can implement the corresponding functions of the above-mentioned first terminal device.
  • the receiving unit 1110 is configured to receive resource indication information and target data, the resource indication information is used to indicate a plurality of reserved resources reserved by the second terminal device, and part or all of the plurality of reserved resources are reserved resources belongs to the first resource.
  • the processing unit 1120 is configured to determine the relationship between the conflicting reserved resources and the transmission mode of the physical sidelink feedback channel PSFCH based on the A manner of sending the first PSFCH associated with the first resource, wherein the first PSFCH carries a first resource conflict indication and/or a first HARQ feedback for the target data, and the first resource conflict indication is used to indicate There is a conflict in the reserved resources in the first resource, and the sending method of the PSFCH includes the frequency domain unit occupied by the conflict indication used to indicate the conflicted reserved resources, and/or, sending or not sending HARQ feedback.
  • the sending method of the first PSFCH includes the first A resource conflict indication occupies the first frequency domain unit.
  • the sending method of the first PSFCH includes the first A resource conflict indication occupies the second frequency domain unit.
  • the first terminal device fails to receive the target data, and the first resource includes the first reserved resource and the second reserved resource, the first PSFCH
  • the sending manner includes occupying the first frequency domain unit and the second frequency domain unit to send the first resource conflict indication.
  • the manner of sending the first PSFCH further includes not sending the first HARQ feedback for the target data.
  • the reserved resource in the first resource is a retransmission resource of the target data.
  • FIG. 12 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device shown in FIG. 12 can implement the corresponding functions of the above first terminal device, and the terminal device 1200 shown in FIG. 12 includes a receiving unit 1210 and a processing unit 1220 .
  • the receiving unit 1210 is configured to receive resource indication information and target data, where the resource indication information is used to indicate multiple reserved resources reserved by the second terminal device, and the multiple reserved resources include the first reserved resource;
  • the processing unit 1220 determines the first physical sidelink feedback channel PSFCH A transmission manner, wherein, the transmission manner of the first PSFCH includes carrying a first resource conflict indication and/or first HARQ feedback for the target data in the first PSFCH, and the first resource conflict indication is used for Indicates that there is a conflict in the first reserved resource.
  • the first terminal device successfully receives the target data, and the first reserved resource is an initial transmission resource, the first PSFCH is sent in the first The PSFCH carries the first resource conflict indication.
  • the first PSFCH is sent in the following manner:
  • the first resource conflict indication is carried in a PSFCH.
  • the first PSFCH is sent in the following manner: A PSFCH carries the first resource conflict indication and the first HARQ feedback.
  • FIG. 13 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device shown in FIG. 13 can implement the corresponding functions of the above first terminal device, and the terminal device 1300 shown in FIG. 13 includes a receiving unit 1310 and a sending unit 1320 .
  • the receiving unit 1310 is configured to receive resource indication information sent by the second terminal device in the first time domain unit, where the resource indication information is used to indicate the target reserved resource of the second terminal device in the second time domain unit ;
  • the sending unit 1320 is configured to send a resource conflict indication to the second terminal device in a third time domain unit, where the resource conflict indication is used to indicate that conflicting reserved resources exist in the target reserved resources, where the The position of the third time domain unit in the time domain is determined based on one or more of the following information: the position of the first time domain unit in the time domain; the position of the second time domain unit in the time domain The position above; the time required for the first terminal device to decode the indication information; the time required for the first terminal device to prepare the resource conflict indication; the time required for the second terminal device to decode the resource conflict indication and, the time required for the second terminal device to prepare to transmit data on the reserved resource.
  • the time interval between the first time domain unit and the third time domain unit is based on the time required for the first terminal device to decode the indication information and the second The time required for a terminal device to prepare the resource conflict indication is determined.
  • the time interval between the third time domain unit and the second time domain unit is based on the time required for the second terminal device to decode the resource conflict indication and the The time required for the second terminal device to prepare to transmit data on the reserved resource is determined.
  • the resource conflict indication is carried on a physical sidelink feedback channel PSFCH.
  • the time required for the second terminal device to decode the first PSFCH is determined based on the time required for the second terminal device to decode the sidelink control information SCI.
  • the conflicting reserved resources are multiple reserved resources, and the multiple reserved resources meet any of the following conditions: at least one of the multiple reserved resources Some of the reserved resources are initial transmission resources; at least some of the multiple reserved resources are retransmission resources; the multiple reserved resources belong to the resource indication information indicating that the second terminal device reserves resource set, the distance between each reserved resource in the plurality of reserved resources and the time-frequency resource occupied by the resource indication information is less than a first distance, and the first distance is the set of resources except the The distance between other reserved resources other than the plurality of reserved resources and the time-frequency resource occupied by the resource indication information.
  • FIG. 14 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device shown in FIG. 14 can implement the corresponding functions of the above-mentioned second terminal device.
  • the terminal device 1400 shown in FIG. 14 can implement the corresponding functions of the above-mentioned second terminal device.
  • the terminal device 1400 shown in FIG. 14 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the sending unit 1410 is configured to send resource indication information and target data to the first terminal device, where the resource indication information is used to indicate a plurality of reserved resources reserved by the second terminal device, and among the plurality of reserved resources Some or all of the reserved resources belong to the first resource;
  • the receiving unit 1420 is configured to receive the first physical sidelink feedback channel PSFCH sent by the first terminal device, and the sending method of the first PSFCH is Determined based on the association between the first resource, the conflicting reserved resource, and the transmission mode of the physical sidelink feedback channel PSFCH, wherein the first PSFCH carries the first resource conflict indication and/or for the The first HARQ feedback of the target data, the first resource conflict indication is used to indicate that there is a conflict in the reserved resources in the first resource, and the transmission mode of the PSFCH includes resources used to indicate that there is a conflict in the reserved resources A sequence of collision indications, and/or, sending or not sending HARQ feedback.
  • the sequence carrying the resource conflict indication is the same as the sequence carrying the first HARQ feedback.
  • the first terminal device fails to receive the target data and the first resource is the first reserved resource, the first PSFCH is sent in the first Sequentially send the first resource conflict indication and not send the first HARQ feedback.
  • the first terminal device fails to receive the target data and the first resource is the second reserved resource, the first PSFCH is sent in the second sending the first resource conflict indication in a sequence without sending the first HARQ feedback, wherein the second sequence is different from the first sequence.
  • the The first PSFCH is sent in a manner of sending the first resource conflict indication in a third sequence.
  • the The first PSFCH is sent in a manner of sending the first resource conflict indication and sending the first HARQ feedback in a first sequence.
  • the first HARQ feedback is NACK-based HARQ feedback only, and the first HARQ feedback is ACK.
  • the reserved resource in the first resource is a retransmission resource of the target data.
  • FIG. 15 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device shown in FIG. 15 can implement the corresponding functions of the above-mentioned second terminal device.
  • the terminal device 1500 shown in FIG. 15 can implement the corresponding functions of the above-mentioned second terminal device.
  • the terminal device 1500 shown in FIG. 15 can implement the corresponding functions of the above-mentioned second terminal device.
  • the sending unit 1510 is configured to send resource indication information and target data to the first terminal device, where the resource indication information is used to indicate a plurality of reserved resources reserved by the second terminal device, and among the plurality of reserved resources Some or all of the reserved resources belong to the first resource;
  • the receiving unit 1520 is configured to receive the first physical sidelink feedback channel PSFCH, and the sending mode of the first PSFCH is based on the first resource, existing The association relationship between the conflicting reserved resources and the PSFCH transmission mode is determined, wherein the first PSFCH carries the first resource conflict indication and/or the first HARQ feedback for the target data, and the first The resource conflict indication is used to indicate that there is a conflict in the reserved resources in the first resource, and the sending method of the PSFCH includes the frequency domain unit occupied by the conflict indication used to indicate the conflicted reserved resources, and/or, sending or No HARQ feedback is sent.
  • the sending method of the first PSFCH includes the first A resource conflict indication occupies the first frequency domain unit.
  • the sending method of the first PSFCH includes the first A resource conflict indication occupies the second frequency domain unit.
  • the first terminal device fails to receive the target data, and the first resource includes the first reserved resource and the second reserved resource, the first PSFCH
  • the sending manner includes occupying the first frequency domain unit and the second frequency domain unit to send the first resource conflict indication.
  • the manner of sending the first PSFCH further includes not sending the first HARQ feedback for the target data.
  • the reserved resource in the first resource is a retransmission resource of the target data.
  • Figure 16 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device shown in Figure 16 can implement the corresponding functions of the second terminal device above, and the terminal device 1600 shown in Figure 16 can also include a sending unit 1610 and a receiving unit 1620 .
  • the sending unit 1610 is configured to send resource indication information and target data to the first terminal device, where the resource indication information is used to indicate multiple reserved resources reserved by the second terminal device, and the multiple reserved resources include the first - reserved resources;
  • the receiving unit 1620 is configured to receive the first physical sidelink feedback channel PSFCH sent by the first terminal device, and the sending method of the first PSFCH is based on The first reserved resource is determined for the retransmission resource or initial transmission resource of the target data, wherein the sending method of the first PSFCH includes carrying a first resource conflict indication and/or For the first HARQ feedback of the target data, the first resource conflict indication is used to indicate that there is a conflict in the first reserved resource.
  • the first terminal device successfully receives the target data, and the first reserved resource is an initial transmission resource, the first PSFCH is sent in the first The PSFCH carries the first resource conflict indication.
  • the first PSFCH is sent in the following manner:
  • the first resource conflict indication is carried in a PSFCH.
  • the first PSFCH is sent in the following manner: A PSFCH carries the first resource conflict indication and the first HARQ feedback.
  • FIG. 17 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device shown in FIG. 17 can implement the corresponding functions of the above-mentioned second terminal device.
  • the terminal device 1700 shown in FIG. 17 can implement the corresponding functions of the above-mentioned second terminal device.
  • the terminal device 1700 shown in FIG. 17 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • a sending unit 1710 configured to send resource indication information to the first terminal device in the first time domain unit, where the resource indication information is used to indicate the target reserved resource of the second terminal device in the second time domain unit;
  • the receiving unit 1720 is configured to receive, on a third time domain unit, a resource conflict indication sent by the second terminal device, where the resource conflict indication is used to indicate that conflicting reserved resources exist in the target reserved resources, wherein,
  • the position of the third time domain unit in the time domain is determined based on one or more of the following information: the position of the first time domain unit in the time domain; the position of the second time domain unit in the time domain The location on the domain; the time required for the first terminal device to decode the indication information; the time required for the first terminal device to prepare the resource conflict indication; the second terminal device to decode the resource conflict indication required time; and the time required for the second terminal device to prepare to transmit data on the reserved resource.
  • the time interval between the first time domain unit and the third time domain unit is based on the time required for the first terminal device to decode the indication information and the second The time required for a terminal device to prepare the resource conflict indication is determined.
  • the time interval between the third time domain unit and the second time domain unit is based on the time required for the second terminal device to decode the resource conflict indication and the The time required for the second terminal device to prepare to transmit data on the reserved resource is determined.
  • the resource conflict indication is carried on a physical sidelink feedback channel PSFCH.
  • the time required for the second terminal device to decode the first PSFCH is determined based on the time required for the second terminal device to decode the sidelink control information SCI.
  • the conflicting reserved resources are multiple reserved resources, and the multiple reserved resources meet any of the following conditions: at least one of the multiple reserved resources Some of the reserved resources are initial transmission resources; at least some of the multiple reserved resources are retransmission resources; the multiple reserved resources belong to the resource indication information indicating that the second terminal device reserves resource set, the distance between each reserved resource in the plurality of reserved resources and the time-frequency resource occupied by the resource indication information is less than a first distance, and the first distance is the set of resources except the The distance between other reserved resources other than the plurality of reserved resources and the time-frequency resource occupied by the resource indication information.
  • Fig. 18 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the dashed line in Figure 18 indicates that the unit or module is optional.
  • the apparatus 1800 may be used to implement the methods described in the foregoing method embodiments.
  • Apparatus 1800 may be a chip or a terminal device.
  • Apparatus 1800 may include one or more processors 1810 .
  • the processor 1810 may support the device 1800 to implement the methods described in the foregoing method embodiments.
  • the processor 1810 may be a general purpose processor or a special purpose processor.
  • the processor may be a central processing unit (central processing unit, CPU).
  • the processor can also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), off-the-shelf programmable gate arrays (field programmable gate arrays, FPGAs) Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • Apparatus 1800 may also include one or more memories 1820 .
  • a program is stored in the memory 1820, and the program can be executed by the processor 1810, so that the processor 1810 executes the methods described in the foregoing method embodiments.
  • the memory 1820 may be independent from the processor 1810 or may be integrated in the processor 1810 .
  • the apparatus 1800 may also include a transceiver 1830 .
  • the processor 1810 can communicate with other devices or chips through the transceiver 1830 .
  • the processor 1810 may send and receive data with other devices or chips through the transceiver 1830 .
  • the embodiment of the present application also provides a computer-readable storage medium for storing programs.
  • the computer-readable storage medium can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product includes programs.
  • the computer program product can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal or the network device provided in the embodiments of the present application, and the computer program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the "indication" mentioned may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is instructed, configures and is configured, etc. relation.
  • predefined or “preconfigured” can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices).
  • the application does not limit its specific implementation.
  • pre-defined may refer to defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, which is not limited in the present application.
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, rather than the implementation process of the embodiments of the present application. constitute any limitation.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device 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 can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to realize the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be read by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital video disc, DVD)) or a semiconductor medium (for example, a solid state disk (solid state disk, SSD) )wait.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a digital versatile disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disk, SSD)

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Abstract

提供了一种通信方法和终端设备,该方法包括:第一终端设备接收资源指示信息和目标数据,资源指示信息用于指示第二终端设备预留的多个预留资源,多个预留资源中的部分或全部预留资源属于第一资源;在第一资源内的预留资源存在冲突的情况下,第一终端设备基于存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系,确定与第一资源关联的第一PSFCH的发送方式,以减少PSFCH占用的比特数量,避免了直接在资源冲突指示中携带存在冲突的预留资源的标识导致资源冲突指示的比特数量较多。

Description

通信方法及终端设备 技术领域
本申请涉及通信技术领域,并且更为具体地,涉及一种通信方法及终端设备。
背景技术
在已知的资源分配增强方案中,第一终端设备在检测到第二终端设备的预留资源存在冲突时,第一终端设备可以向第二终端设备发送第一物理侧行反馈信道(physical sidelink feedback channel,PSFCH)以携带资源冲突指示,指示第二终端设备预留的资源中存在冲突的预留资源。然而,用于传输PSFCH的资源较少,并且真正传输PSFCH时,PSFCH通常在时域上仅占用一个符号,在频域上仅占用一个物理资源块(physical resource block,PRB),因此,PSFCH的容量通常仅有1比特。如果直接在资源冲突指示中直接携带存在冲突的预留资源的标识,会导致用于传输PSFCH的资源无法承载同时承载资源冲突指示和混合自动重传请求(hybrid automatic repeat request,HARQ)反馈。
发明内容
本申请提供一种通信方法和终端设备,以减少PSFCH占用的比特数量。
第一方面,提供了一种通信方法,包括:第一终端设备接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;在所述第一资源内的预留资源存在冲突的情况下,所述第一终端设备基于存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系,确定与所述第一资源关联的第一PSFCH的发送方式,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的资源冲突指示的序列,和/或,发送或不发送HARQ反馈。
第二方面,提供了一种通信方法,第一终端设备接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;在所述第一资源内的预留资源存在冲突的情况下,所述第一终端设备基于存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系,确定与所述第一资源关联的第一PSFCH的发送方式,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的冲突指示占用的频域单元,和/或,发送或不发送HARQ反馈。
第三方面,提供了一种通信方法,包括:第一终端设备接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中包括第一预留资源;在所述第一预留资源存在冲突的情况下,所述第一终端设备基于所述第一预留资源为所述目标数据的重传资源或初传资源,确定第一物理侧行反馈信道PSFCH的发送方式,其中,所述第一PSFCH的发送方式包括在所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一预留资源存在冲突。
第四方面,提供一种通信方法,包括:第一终端设备在第一时域单元内接收第二终端设备发送的资源指示信息,所述资源指示信息用于指示所述第二终端设备在第二时域单元内的目标预留资源;所述第一终端设备在第三时域单元上向所述第二终端设备发送资源冲突指示,所述资源冲突指示用于指示所述目标预留资源中存在冲突的预留资源,其中,所述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:所述第一时域单元在时域上的位置;所述第二时域单元在时域上的位置;所述第一终端设备解码所述指示信息所需的时间;所述第一终端设备准备所述资源冲突指示所需的时间;所述第二终端设备解码所述资源冲突指示所需的时间;以及所述第二终端设备准备在所述预留资源上传输数据所需的时间。
第五方面,提供一种通信方法,包括:第二终端设备向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示所述第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;在所述第一资源内的预留资源存在冲突的情况下,第二终端设备接收所述第一终端设备发送的第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一资源、存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系确定的,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的资源冲突指示的序列,和/或,发送或不发送HARQ反馈。
第六方面,一种通信方法,包括:第二终端设备向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示所述第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;在所述第一资源内的预留资源存在冲突的情况下,所述第二终端设备接收第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一资源、存在冲突的预留资源与PSFCH的发送方式之间的关联关系确定的,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的冲突指示占用的频域单元,和/或,发送或不发送HARQ反馈。
第七方面,提供一种通信方法,包括:第二终端设备向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中包括第一预留资源;在所述第一预留资源存在冲突的情况下,所述第二终端设备接收所述第一终端设备发送的第一第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一预留资源为所述目标数据的重传资源或初传资源确定的,其中,所述第一PSFCH的发送方式包括在所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一预留资源存在冲突。
第八方面,提供一种通信方法,包括:第二终端设备在第一时域单元内向第一终端设备发送资源指示信息,所述资源指示信息用于指示所述第二终端设备在第二时域单元内的目标预留资源;所述第二终端设备在第三时域单元上接收所述第二终端设备发送的资源冲突指示,所述资源冲突指示用于指示所述目标预留资源中存在冲突的预留资源,其中,所述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:所述第一时域单元在时域上的位置;所述第二时域单元在时域上的位置;所述第一终端设备解码所述指示信息所需的时间;所述第一终端设备准备所述资源冲突指示所需的时间;所述第二终端设备解码所述资源冲突指示所需的时间;以及所述第二终端设备准备在所述预留资源上传输数据所需的时间。
第九方面,提供一种第一终端设备,包括:接收单元,用于接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;在所述第一资源内的预留资源存在冲突的情况下,处理单元,用于基于存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系,确定与所述第一资源关联的第一PSFCH的发送方式,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的资源冲突指示的序列,和/或,发送或不发送HARQ反馈。
第十方面,提供一种第一终端设备,包括:接收单元,用于接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中包括第一预留资源;在所述第一预留资源存在冲突的情况下,处理单元基于所述第一预留资源为所述目标数据的重传资源或初传资源,确定第一物理侧行反馈信道PSFCH的发送方式,其中,所述第一PSFCH的发送方式包括在所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一预留资源存在冲突。
第十一方面,提供一种第一终端设备,包括:接收单元,用于在第一时域单元内接收第二终端设备发送的资源指示信息,所述资源指示信息用于指示所述第二终端设备在第二时域单元内的目标预留资源;发送单元,用于在第三时域单元上向所述第二终端设备发送资源冲突指示,所述资源冲突指示用于指示所述目标预留资源中存在冲突的预留资源,其中,所述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:所述第一时域单元在时域上的位置;所述第二时域单元在时域上的位置;所述第一终端设备解码所述指示信息所需的时间;所述第一终端设备准备所述资源冲突指示所需的时间;所述第二终端设备解码所述资源冲突指示所需的时间;以及所述第二终端设备准备在所述预留资源上传输数据所需的时间。
第十二方面,提供一种第二终端设备,包括:发送单元,用于向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示所述第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;在所述第一资源内的预留资源存在冲突的情况下,接收单元,用于接收所述第一终端设备发送的第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一资源、存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系确定的,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的资源冲突指示的序列,和/或,发送或不发送HARQ反馈。
第十三方面,提供一种第二终端设备,包括:发送单元,用于向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示所述第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;在所述第一资源内的预留资源存在冲突的情况下,接收单元,用于接收第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一资源、存在冲突的预留资源与PSFCH的发送方式之间的关联关系确定的,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的冲突指示占用的频域单元,和/或,发送或不发送HARQ反馈。
第十四方面,提供一种第二终端设备,包括:发送单元,用于向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中包括第一预留资源;在所述第一预留资源存在冲突的情况下,接收单元,用于接收所述第一终端设备发送的第一第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一预留资源为所述目标数据的重传资源或初传资源确定的,其中,所述第一PSFCH的发送方式包括在所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一预留资源存在冲突。
第十五方面,提供一种通信第二终端设备,包括:发送单元,用于在第一时域单元内向第一终端设备发送资源指示信息,所述资源指示信息用于指示所述第二终端设备在第二时域单元内的目标预留资源;接收单元,用于在第三时域单元上接收所述第二终端设备发送的资源冲突指示,所述资源冲突指示用于指示所述目标预留资源中存在冲突的预留资源,其中,所述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:所述第一时域单元在时域上的位置;所述第二时域单元在时域上的位置;所述第一终端设备解码所述指示信息所需的时间;所述第一终端设备准备所述资源冲突指示所需的时间;所述第二终端设备解码所述资源冲突指示所需的时间;以及所述第二终端设备准备在所述预留资源上传输数据所需的时间。
第十六方面,提供一种终端设备,包括处理器、存储器以及通信接口,所述存储器用于存储一个或多个计算机程序,所述处理器用于调用所述存储器中的计算机程序使得所述终端设备执行上述各个方面的方法中的部分或全部步骤。
第十七方面,本申请实施例提供了一种通信系统,该系统包括上述的第一终端设备和/或第二终端设备。在另一种可能的设计中,该系统还可以包括本申请实施例提供的方案中与该终端或网络设备进行交互的其他设备。
第十八方面,本申请实施例提供了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,所述计算机程序使得终端执行上述各方面的方法中的部分或全部步骤。
第十九方面,本申请实施例提供了一种计算机程序产品,其中,所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质,所述计算机程序可操作来使终端执行上述各方面的方法中的部分或全部步骤。在一些实现方式中,该计算机程序产品可以为一个软件安装包。
第二十方面,本申请实施例提供了一种芯片,该芯片包括存储器和处理器,处理器可以从存储器中调用并运行计算机程序,以实现上述各方面的方法中所描述的部分或全部步骤。
本申请通过将存在冲突的预留资源与PSFCH的发送方式相关联,这样第一终端设备可以隐式地通过PSFCH的发送方式来向第二终端设备指示存在冲突的预留资源,有利于减少PFSCH中资源冲突指示所需的比特数量,避免了直接在资源冲突指示中携带存在冲突的预留资源的标识导致资源冲突指示的比特数量较多。
附图说明
图1是本申请实施例适用的无线通信系统100。
图2是2阶SCI占用的侧行资源的示意图。
图3是存在隐藏节点的场景的示意图。
图4是存在暴露终端的场景的示意图。
图5是资源分配增强方案的方式二的示意性流程图。
图6是本申请实施例的通信方法的示意性流程图。
图7是本申请实施例的通信方法的示意性流程图。
图8是本申请实施例的通信方法的示意性流程图。
图9是本申请实施例的通信方法的示意图。
图10是本申请实施例的终端设备的示意图。
图11是本申请实施例的终端设备的示意图。
图12是本申请实施例的终端设备的示意图。
图13是本申请实施例的终端设备的示意图。
图14是本申请实施例的终端设备的示意图。
图15是本申请实施例的终端设备的示意图。
图16是本申请实施例的终端设备的示意图。
图17是本申请实施例的终端设备的示意图。
图18是本申请实施例的通信装置的示意性结构图。
具体实施方式
下面将结合附图,对本申请中的技术方案进行描述。为了便于理解,下文先结合图1至图介绍本申请实施例涉及的通信过程。
图1是本申请实施例适用的无线通信系统100。该无线通信系统100可以包括网络设备110和终端设备121~129。网络设备110可以为特定的地理区域提供通信覆盖,并且可以与位于该覆盖区域内的终端设备进行通信。
在一些实现方式中,终端设备与终端设备之间可以通过侧行链路(sidelink,SL)进行通信。侧行链路通信也可称为邻近服务(proximity services,ProSe)通信、单边通信、旁链通信、设备到设备(device to device,D2D)通信。
或者说,终端设备和终端设备之间通过侧行链路传输侧行数据。其中侧行数据可以包括数据和/或控制信令。在一些实现方式中,侧行数据例如可以是物理侧行控制信道(physical sidelink control channel,PSCCH)、物理侧行共享信道(physical sidelink control channel,PSSCH)、PSCCH解调参考信号(demodulation reference signal,DMRS)、PSSCH DMRS、物理侧行反馈信道(feedback channel,PSFCH)等;
下文结合图1介绍几种常见的侧行链路通信场景。在侧行链路通信中,根据侧行链路中的终端设备是否处于网络设备的覆盖范围内,可以分为4种场景。场景1,终端设备在网络设备的覆盖范围内进行侧行链路通信。场景2,部分终端设备在网络设备的覆盖范围内进行侧行链路通信。场景3,终端设备在网络设备的覆盖范围外进行侧行链路通信。
如图1所示,在场景1中,终端设备121~122可以通过侧行链路通信,且终端设备121~122都在网络设备110的覆盖范围内,或者说,终端设备121~122均处于同一网络设备110的覆盖范围内。在这种场景中,网络设备110可以向终端设备121~122发送配置信令,相应地,终端设备121~122基于配置信令通过侧行链路进行通信。
如图1所示,在场景2中,终端设备123~124可以通过侧行链路通信,且终端设备123在网络设备110的覆盖范围内,终端设备124在网络设备110的覆盖范围之外。在这种场景中,终端设备123接收到网络设备110的配置信息,并基于配置信令的配置通过侧行链路进行通信。但是对于终端设备124而言,由于终端设备124位于网络设备110的覆盖范围之外,无法接收到网络设备110的配置信息,此时,终端设备124可以基于根据预配置(pre-configuration)的配置信息和/或位于覆盖范围内的终端设备123发送的配置信息,获取侧行链路通信的配置,以便基于获取的配置与终端设备123通过侧行链路进行通信。
在一些情况下,终端设备123可以通过侧行广播信道(physical sidelink broadcast channel,PSBCH)向终端设备124发送上述配置信息,以配置终端设备124通过侧行链路进行通信。
如图1所示,在场景3中,终端设备125~129都位于网络设备110的覆盖范围之外,无法与网络设备110进行通信。在这种情况下,终端设备都可以基于预配置信息配置侧行链路通信。
在一些情况下,位于网络设备覆盖范围之外的终端设备127~129可以组成一个通信组,通信组内的终端设备127~129可以相互通信。另外,通信组内的终端设备127可以作为中央控制节点,又称为组头终端设备(cluster header,CH),相应地,其他通信组内的终端设备可以称为“组成员”。
作为CH的终端设备127可以具有以下一种或多种功能:负责通信组的建立;组成员的加入、离开;进行资源协调,为组成员分配侧行传输资源,接收组成员的侧行反馈信息;与其他通信组进行资源协调等功能。
需要说明的是,图1示例性地示出了一个网络设备和多个终端设备,可选地,该无线通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备,本申请实施例对此不做限定。
可选地,该无线通信系统100还可以包括网络控制器、移动管理实体等其他网络实体,本申请实施 例对此不作限定。
应理解,本申请实施例的技术方案可以应用于各种通信系统,例如:第五代(5th generation,5G)系统或新无线(new radio,NR)、长期演进(long term evolution,LTE)系统、LTE频分双工(frequency division duplex,FDD)系统、LTE时分双工(time division duplex,TDD)等。本申请提供的技术方案还可以应用于未来的通信系统,如第六代移动通信系统,又如卫星通信系统等等。
本申请实施例中的终端设备也可以称为用户设备(user equipment,UE)、接入终端、用户单元、用户站、移动站、移动台(mobile station,MS)、移动终端(mobile terminal,MT)、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请实施例中的终端设备可以是指向用户提供语音和/或数据连通性的设备,可以用于连接人、物和机,例如具有无线连接功能的手持式设备、车载设备等。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device,MID)、可穿戴设备,虚拟现实(virtual reality,VR)设备、增强现实(augmented reality,AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。可选地,UE可以用于充当基站。例如,UE可以充当调度实体,其在V2X或D2D等中的UE之间提供侧行数据。比如,蜂窝电话和汽车利用侧行数据彼此通信。蜂窝电话和智能家居设备之间通信,而无需通过基站中继通信信号。
本申请实施例中的网络设备可以是用于与终端设备通信的设备,该网络设备也可以称为接入网设备或无线接入网设备,如网络设备可以是基站。本申请实施例中的网络设备可以是指将终端设备接入到无线网络的无线接入网(radio access network,RAN)节点(或设备)。基站可以广义的覆盖如下中的各种名称,或与如下名称进行替换,比如:节点B(NodeB)、演进型基站(evolved NodeB,eNB)、下一代基站(next generation NodeB,gNB)、中继站、接入点、传输点(transmitting and receiving point,TRP)、发射点(transmitting point,TP)、主站MeNB、辅站SeNB、多制式无线(MSR)节点、家庭基站、网络控制器、接入节点、无线节点、接入点(access point,AP)、传输节点、收发节点、基带单元(base band unit,BBU)、射频拉远单元(Remote Radio Unit,RRU)、有源天线单元(active antenna unit,AAU)、射频头(remote radio head,RRH)、中心单元(central unit,CU)、分布式单元(distributed unit,DU)、定位节点等。基站可以是宏基站、微基站、中继节点、施主节点或类似物,或其组合。基站还可以指用于设置于前述设备或装置内的通信模块、调制解调器或芯片。基站还可以是移动交换中心以及设备到设备D2D、车辆外联(vehicle-to-everything,V2X)、机器到机器(machine-to-machine,M2M)通信中承担基站功能的设备、6G网络中的网络侧设备、未来的通信系统中承担基站功能的设备等。基站可以支持相同或不同接入技术的网络。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。
基站可以是固定的,也可以是移动的。例如,直升机或无人机可以被配置成充当移动基站,一个或多个小区可以根据该移动基站的位置移动。在其他示例中,直升机或无人机可以被配置成用作与另一基站通信的设备。
在一些部署中,本申请实施例中的网络设备可以是指CU或者DU,或者,网络设备包括CU和DU。gNB还可以包括AAU。
网络设备和终端设备可以部署在陆地上,包括室内或室外、手持或车载;也可以部署在水面上;还可以部署在空中的飞机、气球和卫星上。本申请实施例中对网络设备和终端设备所处的场景不做限定。
应理解,本申请中的通信设备的全部或部分功能也可以通过在硬件上运行的软件功能来实现,或者通过平台(例如云平台)上实例化的虚拟化功能来实现。
侧行链路传输方式
随着自动驾驶技术的发展,可以将自动驾驶技术与通信系统进行融合,或者说,需要通过通信系统来实现车载设备之间的数据交互。因此,对通信系统提出了更高的要求。例如,要求通信系统支持更高的吞吐量、更低的时延、更高的可靠性、更大的覆盖范围、更灵活的资源分配等。在LTE-V2X中,终端设备和终端设备之间仅支持广播的方式进行侧行链路通信。随着技术的发展,在NR-V2X中,引入了单播和组播的传输方式。
对于单播的传输方式而言,接收侧行数据的终端设备通常只有一个。参见图1,终端设备121和终端设备122之间可以通过单播的传输方式通信,当终端设备121通过侧行链路发送侧行数据时,终端设备122作为唯一的接收设备接收该侧行数据。
对于组播的传输方式而言,接收侧行数据的终端设备可以是一个通信组内的所有终端设备,或者,接收侧行数据的终端设备可以是在一定传输距离内的所有终端设备。例如,参见图1,对于包括终端设 备127~129的通信组而言,当终端设备127以组播的方式发送侧行数据时,该通信组内的其他终端设备128~129都是接收该侧行数据的接收终端设备。又例如,参见图1,假设在预设范围内的终端设备包括终端设备127~129,当终端设备127以组播的方式发送侧行数据时,该预设范围内的其他终端设备128~129都是接收该侧行数据的接收终端设备。
对于广播的传输方式而言,接收侧行数据的终端设备可以是作为发送端的终端设备周围的任意一个终端设备。例如,参见图1,假设终端设备125作为发送端,以广播的形式发送侧行数据,则位于终端设备125周围的终端设备121~124以及126~129都可以作为该侧行数据的接收端。
2阶SCI机制
在NR-V2X中引入2阶SCI,下文结合图2介绍2阶SCI占用的侧行资源。参见图2,第一阶SCI承载在PSCCH中。在一些实现方式中,第一阶SCI用于指示PSSCH占用的侧行资源、预留资源信息、调制与编码策略(modulation and coding Scheme,MCS)等级、优先级等信息。
第二阶SCI在可以在PSSCH的中传输,并利用PSSCH的DMRS进行解调。在一些实现方式中,PSCCH可以占据3个符号(符号1、2、3)。第二阶SCI可以从PSSCH的第一个DMRS符号开始映射,先频域再时域映射。PSSCH的DMRS占据符号4、11。在另一些实现方式中,第二阶SCI从符号4开始映射并可以一直映射到符号6。在符号4上和DMRS频分复用。其中,第二阶SCI占据的侧行资源大小取决于第二阶SCI的比特数。在一些实现方式中,第二SCI可以用于指示发送端的ID、接收端的ID、混合自动重传请求(Hybrid Automatic Repeat reQuest,HARQ)ID、新数据指示(new data indicator,NDI)等用于数据解调的信息。
侧行资源分配方式
目前,在某些通信系统(例如,NR)中,定义了两种侧行资源的资源配置方式,模式1和模式2。
模式1,由网络设备为终端设备调度侧行资源。
目前,在模式1中可以分为动态资源配置(dynamic resource allocation)和侧行链路配置授权(sidelink configured grant,SL CG)两种方式。在动态资源配置下,网络设备可以通过发送下行控制信息(downlink control information,DCI)为终端设备分配侧行传输资源。在侧行链路配置授权方式下,当终端设备被配置了侧行资源后,如果终端设备有待发送的数据时,终端设备可以使用配置的侧行资源传输数据,而不需要向网络设备重新申请侧行资源。因此,采用配置授权的资源配置方式可以降低侧行链路的传输时延。
上述配置授权又细分为两个类型,在配置授权的类型1(Type1)中,侧行资源配置完全基于无线资源控制(radio resource control,RRC)信令。在配置授权的类型2(Type2)中,通信系统中的侧行资源配置可以由RRC信令和层1(layer 1,L1)信令共同配置,其中L1信令用于指示RRC配置的激活和去激活。
在一些实现方式中,网络设备可以为终端设备调度单次传输的侧行资源。在另一些实现方式中,网络设备还可以为终端设备配置半静态的侧行资源。
例如,参见图1,终端设备121~123位于网络设备110的覆盖范围内,网络设备110可以为终端设备121~123分配侧行资源。
模式2,终端设备在资源池中自主选择侧行资源。
在该模式下,终端设备执行的过程包括资源探测过程和/或资源选择过程。在资源探测过程中,终端设备可以通过解调侧行控制信息(sidelink control information,SCI)来对侧行资源的占用情况进行鉴定。终端设备还可以通过测量侧行链路的接收功率来对侧行资源的占用情况进行鉴定。例如,参见图1,终端设备124~129位于网络设备110的覆盖范围外,终端设备124~129可以通过上述模式2的方式自主选择侧行资源。
在一些实现方式中,上述资源探测的过程中,终端设备可以将资源选择窗内所有的可用资源作为资源集合A。
如果终端设备在侦听窗内侦听到物理侧行控制信道(physical sidelink control channel,PSCCH),可以对侦听到的PSCCH进行测量,并基于PSCCH的测量结果确定上述资源集合A中的可用资源。
例如,终端设备可以测量该PSCCH的参考信号接收功率(reference signal receiving power,RSRP),或者,终端设备可以测量PSCCH调度的物理侧行共享信道(physical sidelink share channel,PSSCH)的RSRP。如果终端设备测量的RSRP大于SL-RSRP阈值,并且确定上述PSCCH中传输的SCI指示的预留资源在资源选择窗内,则终端设备从资源集合A中排除对应的预留资源。
需要说明的是,如果资源集合A中剩余资源不足资源集合A进行资源排除前全部资源的X%,则将SL-RSRP阈值抬升3dB,重新执行上述资源探测过程。在一些实现方式中,参数X可能的取值为{20,35,50}。相应地,终端设备可以根据待发送数据的优先级从参数X的取值集合中确定参数X。另外, 上述SL-RSRP阈值与终端设备侦听到的PSCCH中携带的优先级以及终端设备待发送数据的优先级有关。
另外,假设终端设备需要在侦听窗内某些时隙发送数据,但该终端设备并没有在侦听窗内进行侦听,则这些时隙在资源选择窗内对应的时隙上的全部侧行资源被排除掉,或者说,终端设备将无法使用这些时隙在资源选择窗内对应的时隙上的全部侧行资源。相应地,终端设备可以利用所用资源池配置中的“resource reservation period”域的取值集合,来重新选择资源选择窗内对应的时隙的侧行资源来传输待发送数据。
在另一些实现方式中,上述资源选择过程中,终端设备从资源集合A中随机选择若干资源,作为其初次传输新数据的资源(又称“初传资源”)或重传数据的发送资源(又称“重传资源”)。
在上文介绍的模式2的资源分配方式中,终端设备可以基于侦听结果在资源池中自主选择侧行资源,这种先侦听再选择的资源选取方式在一定程度上能够避免终端设备之间的干扰,但是还可能存在隐藏节点(Hidden node)、半双工(Half-duplex)、暴露终端以及终端设备功耗较大等问题。下文针对上述问题分别介绍。
对于隐藏节点的问题而言,图3是存在隐藏节点的场景的示意图。在图3中,假设终端设备B需要根据侦听结果选取侧行资源,并利用选取的侧行资源向终端设备A发送侧行数据。相应地,终端设备C也需要根据侦听结果选取侧行资源,并基于选取的侧行资源向终端设备A发送侧行数据。但由于终端设备B和终端设备C相距较远,因此,终端设备B和终端设备C互相侦听不到对方传输的信号。在这种情况下,终端设备B和终端设备C互相为对方的隐藏节点,导致终端设备B和终端设备C可能选取相同的侧行资源来向终端设备A发送侧行数据,那么终端设备C和终端设备B之间会发生干扰。
对于半双工的问题而言,终端设备无法同时发送数据和侦听侧行资源。当终端设备在侦听窗口内进行侦听以选择侧行资源时,有待发送的数据需要在侦听窗口内的目标时隙上发送,此时,由于半双工的限制,终端设备无法对目标时隙进行侦听,因此,基于上文的介绍,对于没有侦听的目标时隙对应的侧行资源,无论侧行资源上是否真的有其他终端设备传输数据,终端设备都需要将全部排除在可用资源外,也就是说,终端设备需要将资源选择窗口内目标时隙对应的侧行资源全部从上述资源集A中排除,以避免与其他终端之间产生干扰。这样,会导致终端设备排除了很多不需要排除的侧行资源。
对于暴露终端的问题而言,图4示出了存在暴露终端的场景的示意图。参见图4,终端设备B需要通过侧行资源向终端设备A发送侧行数据,此时,终端设备A可以称为终端设备B的目标接收终端。终端设备C需要通过侧行资源向终端设备D发送侧行数据,此时,终端设备D可以称为终端设备C的目标接收终端。假设终端设备B和终端设备C因为距离较近,在对侧行资源进行侦听的过程中可以相互监听到对方发送的侧行信号,在这种情况下,终端设备B和终端设备C互为对方的暴露终端,终端设备B和终端设备C不会选择相同的侧行资源。但实际上终端设备B的目标接收终端A与终端设备C之间的距离较远,终端设备C的目标接收终端D与终端设备B之间的距离较远,终端设备B和终端设备C即使使用相同的侧行资源发送各自的侧行数据,并不会干扰各自目标接收终端的接收侧行数据,也就是说,由于暴露终端的存在,导致终端设备C和终端设备B无法在相同的侧行资源上传输各自的侧行数据,导致侧行资源的利用效率较低。
对于终端设备功耗较大的问题而言,在上文介绍的资源探测过程中,终端设备需要持续的对侧行资源进行侦听以选择自己可用的侧行资源。持续的对侧行资源进行侦听将会消耗终端设备很大的能量,导致终端设备很快就没电了。这种情况,将会降低手持终端等无法随时随地充电的终端设备的用户体验。因此,如何降低终端设备的能耗也是资源探测过程中需要考虑的问题。
侧行链路中资源分配增强方案
针对上述模式2中存在的问题,目前提出了侧行链路中资源分配增强方案来进行侧行资源的选取。目前上述资源分配增强方案可以分为以下两种方式。
在方式一中,其他终端设备(又称“终端设备1”)可以为进行资源侦听的终端设备(又称“终端设备2”)发送参考资源集合,以辅助终端设备2进行资源选取。其中,参考资源集合中的侧行资源为可用的侧行资源。在一些实现方式中,上述参考资源集合可以由终端设备1根据侦听结果、网络设备的指示等获取的可用资源集合。在另一些实现方式中,上述参考资源集合还可以是终端设备1根据检测到的SCI确定的可用的侧行资源。相应地,终端设备2可以优先从参考资源集合中选取侧行资源,来向终端设备1发送侧行数据。由于终端设备1的位置与终端设备2的位置不同,终端设备2可以结合终端设备1发送的参考资源集合,来选择合适的侧行资源,有利于避免上述模式2中存在的一些问题,从而提升目标接收终端接收侧行数据的可靠性。通常,我们称上述终端设备1为“资源协调终端”。
需要说明的是,上述参考资源集合也可以包含不适合终端设备2使用的侧行资源,以帮助终端设备2排除不可用的侧行资源。
在方式二中,如果终端设备1检测到终端设备2预留的预留资源上可能发生碰撞,则终端设备1可以通过物理侧行反馈信道(physical sidelink feedback channel,PSFCH)向终端设备1发送资源冲突指示(又称“资源碰撞指示”),以指示终端设备2预留的预留资源存在冲突。相应地,终端设备2在接收到资源冲突指示后,可以获知存在冲突的预留资源,并执行相应的数据重传或资源重选。为了便于理解,下文结合图5介绍资源分配增强方案的方式二的流程。
图5是资源分配增强方案的方式二的示意性流程图。图5所示的方法包括步骤S510和步骤S520。
在步骤S510中,终端设备1检测终端设备2预留的预留资源是否存在冲突。
在一些实现方式中,终端设备1可以通过接收终端设备2发送的第一阶SCI来获知终端设备2预留的预留资源。若终端设备1检测到终端设备2预留的预留资源1存在冲突时,终端设备1可以向终端设备2发送资源冲突指示,以指示预留资源1存在冲突。
在步骤S520中,终端设备1向终端设备2发送资源冲突指示1。
上述资源冲突指示1用于指示预留资源1存在冲突。
在步骤S530中,终端设备2基于资源冲突指示1,执行数据重传或资源重选。
PSFCH
如上文介绍,上述资源冲突指示可以承载于PSFCH中传输,因此,为了便于理解,下文以R16NR-V2X中支持的PSFCH为例介绍PSFCH的传输方式。
在R16NR-V2X中支持序列类型的PSFCH称为“PSFCH格式0”,通常,该类型的PSFCH采用的序列类型和PUCCH格式0相同。该类型PSFCH在频域上占用一个物理资源块(physical resource block,PRB),在时域上占用一个正交频分复用(orthogonal frequency division multiplexing,OFDM)符号。在一个资源池内,用于传输PSFCH的侧行资源可以1,2或4个时隙为周期配置。存在PSFCH资源的时隙上,PSFCH资源通常位于时隙内最后一个可用于侧行发送的OFDM符号上。另外,为了支持收发转换以及自动增益控制(automatic gain control,AGC)调整,PSFCH符号之前的两个OFDM符号分别用于收发转换和AGC调整。通常,在上述三个OFDM符号上不允许PSCCH和PSSCH发送。在R16NR-V2X中,PSFCH只用于承载HARQ反馈信息,一个PSFCH的容量通常为一个比特。
在一些实现方式中,PSFCH占用的侧行资源根据其对应的PSSCH的传输资源的时频位置确定的。在NR-V2X中,支持以下两种PSFCH的资源确定方式。其中,具体采用哪种PSFCH资源确定方式可以根据高层信令配置来确定。
PSFCH资源确定方式1:可以根据PSSCH频域资源的第一个子信道确定PSFCH的传输资源。
PSFCH资源确定方式2:可以根据PSSCH频域占据的所有子信道确定PSFCH的传输资源。
对于PSFCH资源确定方式1而言,由于PSFCH的传输资源只根据PSSCH占据的第一个子信道确定,因此,无论PSSCH占据多少子信道,针对PSSCH的PSFCH占用的侧行资源的数量是固定的。对于PSFCH资源确定方式2而言,PSFCH的传输资源数量可以根据PSSCH占据的子信道数确定,因此,PSSCH占据的子信道越多,相应地针对PSSCH的PSFCH的占用的侧行资源的数量也越多。通常,PSSCH资源确定方式2更适用于需要更多HARQ反馈资源的场景。
根据PSSCH占用的时隙以及子信道可以确定针对PSSCH的PSFCH资源集合
Figure PCTCN2021137899-appb-000001
在资源集合
Figure PCTCN2021137899-appb-000002
中的PSFCH占用的侧行资源的索引可以先按照资源块(resource block,RB)从低到高的顺序,再按照载波(carrier space,CS)对从低到高的顺序确定。
另外,在该资源集合
Figure PCTCN2021137899-appb-000003
中,可以通过公式
Figure PCTCN2021137899-appb-000004
确定PSFCH的传输资源,其中,P ID表示侧行数据的发送端ID,即SCI中携带的发送端的源ID;对于单播或NACK-only的组播侧行HARQ反馈方式,M ID=0;对于ACK/NACK的组播侧行HARQ反馈方式,M ID表示高层配置的侧行数据的接收端的终端设备的组内标识。
在NR-V2X中,PSFCH资源可以由SL-PSFCH-Config-r16信令配置(参见下文所示的伪代码),其中“sl-PSFCH-Period-r16”字段用于配置PSFCH资源的周期;“sl-PSFCH-RB-Set-r16”字段用于配置PSFCH资源所在的OFDM符号上可用于PSFCH发送的PRB;“sl-NumMuxCS-Pair-r16”字段用于配置一个PRB内允许的PFSCH序列的循环移位个数;“sl-MinTimeGapPSFCH-r16”字段用于配置PSFCH和与PSFCH关联的PSSCH的最小时间间隔;“sl-PSFCH-HopID-r16”字段用于配置PSFCH的跳频ID,该跳频ID用于确定PSFCH的序列;“sl-PSFCH-CandidateResourceType-r16”字段用于配置PSFCH备选资源的确定方式。
Figure PCTCN2021137899-appb-000005
Figure PCTCN2021137899-appb-000006
如上文介绍,在资源分配增强方案的方式二中,终端设备1(又称“第一终端设备”)在检测到终端设备2(又称“第二终端设备”)的预留资源存在冲突时,终端设备1可以向终端设备2发送PSFCH(又称“第一PSFCH”)以携带资源冲突指示。然而,如上文介绍用于传输PSFCH的资源较少,并且真正传输PSFCH时,PSFCH通常在时域上仅占用一个符号,在频域上仅占用一个PRB,因此,PSFCH的容量通常仅有1比特。如果直接在资源冲突指示中直接携带存在冲突的预留资源的标识,会导致用于传输PSFCH的资源无法承载同时承载资源冲突指示和HARQ反馈。
因此,为了减少资源冲突指示占用的比特数量,本申请提供了一种通信方法,通过将存在冲突的预留资源与PSFCH的发送方式相关联,隐式地通过PSFCH的发送方式指示存在冲突的预留资源,避免了直接在资源冲突指示中携带存在冲突的预留资源的标识导致资源冲突指示的比特数量较多。
下文结合图6介绍本申请实施例的通信方法,图6是本申请实施例的通信方法的示意性流程图。图6所示的方法包括步骤S610至步骤S640。
在步骤S610中,第二终端设备向第一终端设备发送资源指示信息和目标数据。
上述资源指示信息用于指示第二终端设备预留的多个预留资源。
在一些实现方式中,上述资源指示可以是通过SCI由第二终端设备发送的,具体地发送方式可以参见上文关于SCI的介绍,为了简洁,在此不再赘述。
在步骤S620中,在第一资源内的预留资源存在冲突的情况下,第一终端设备基于存在冲突的预留资源与PSFCH的发送方式之间的关联关系,确定与多个预留资源中存在冲突的预留资源(又称“第一资源”)关联的第一PSFCH的发送方式。其中,第一资源中可以包含一个或多个存在冲突的预留资源。
上述多个预留资源中存在冲突的预留资源不同,则其关联的PSFCH的发送方式不同。其中,上述存在冲突的预留资源不同可以包含存在冲突的预留资源是完全不同的预留资源,例如,若存在冲突的预留资源为预留资源1,则预留资源1关联的PSFCH的发送方式为PSFCH发送方式1,若存在冲突的预留资源为预留资源2,则预留资源2关联的PSFCH的发送方式为PSFCH发送方式2,且PSFCH发送方式1与PSFCH发送方式2不同。上述存在冲突的预留资源不同可以包含存在冲突的预留资源是不完全相同的预留资源。例如,若存在冲突的预留资源为预留资源1,则预留资源1关联的PSFCH的发送方式为PSFCH发送方式1。若存在冲突的预留资源为预留资源1和预留资源2,则预留资源1和预留资源2关联的PSFCH的发送方式为PSFCH发送方式3,并且,PSFCH发送方式1与PSFCH发送方式3不同。
上述第一PSFCH的发送方式可以包含发送或不发送第一PSFCH,并且,在发送第一PSFCH的情况下,第一PSFCH中承载的第一资源冲突指示的发送方式和/或针对目标数据的HARQ反馈的发送方式。其中,第一资源冲突指示用于指示多个预留资源中存在冲突的预留资源。目标数据的HARQ反馈用于指示第一终端设备是否正确接收目标数据。
上述第一资源冲突指示的发送方式可以包含发送第一资源冲突指示的序列、发送第一资源冲突指示占用的频域单元(例如,PRB)等,上述目标数据的HARQ反馈的发送方式包含是否在第一PSFCH中承载HARQ反馈,和/或,承载的HARQ反馈是NACK还是ACK。下文将结合具体的情况详细介绍,为了简洁,在此不再赘述。
在步骤S630中,第一终端设备以第一PSFCH的发送方式向第二终端设备发送第一PSFCH。
需要说明的是,上述第一PSFCH可以包含多个PSFCH,在下文介绍的一些情况中(例如,表2中的情况3-5;表3中的情况5;表4中的情况1-3、情况5中的方式2)当第一终端设备需要同时发送第一HARQ反馈和第一资源冲突指示时,上述第一PSFCH的数量可以包含2个PSFCH。在下文介绍的另一些情况中(例如,表5中的情况5)当第一终端设备需要同时在两个频域单元发送第一资源冲突指示时,上述第一PSFCH的数量可以包含2个PSFCH。
上述第一PSFCH还可以包含1个PSFCH,在下文介绍的一些场景中(例如,表1中的情况1-5; 表2中的情况1-2;表3中的情况1-4、情况5中的方式2;表5中的情况1-4;表6中的情况1-3、5),第一终端设备仅需要反馈第一资源冲突指示或第一HARQ反馈,此时,第一PSFCH可以包含一个PSFCH。
在步骤S640中,第二终端设备基于第一PSFCH的发送方式确定第一资源。
在第二终端设备确定存在冲突的预留资源后,可以基于预设规则进行资源重选,并在重新选择的侧行资源上进行数据传输。本申请实施例对此不作具体限定。在一些实现方式中,如果第二终端设备确定存在冲突的预留资源后,第二终端设备可以基于上文介绍的侧行资源的选择方式进行资源重选。相应地,如果存在冲突的预留资源用于当前数据(例如,TB)的重传(或者说存在冲突的预留资源为重传资源),则第二终端设备可以通过重选的资源重传当前数据。如果存在冲突的预留资源用于下一个数据的初传(或者说存在冲突的预留资源为初传资源),则第二终端设备可以通过重选的资源发送新的数据。
如上文介绍,为了避免在资源冲突指示中直接携带存在冲突的预留资源的标识,可以通过PSFCH的发送方式来区分存在冲突的预留资源。其中,每种PSFCH的发送方式对应一种上文介绍的资源冲突指示的发送方式和HARQ反馈的发送方式的组合。下文通过不同的组合方式示例,介绍本申请实例的通信方法。
在组合方式1中,资源冲突指示的发送方式包含发送资源冲突指示的序列,HARQ反馈的发送方式包含是否发送HARQ反馈。在组合方式1中又包含2种组合方式,下文结合组合方式1-1、1-2分别介绍。
在组合方式1-1中,若多个预留资源中存在冲突的预留资源不同则资源冲突指示的序列不同。或者说,不同的序列可以对应不同的存在冲突的预留资源。其中,存在冲突的预留资源可以是目标数据的重传资源,也可以是新数据的初传资源,本申请实施例对此不作限定。下文以多个预留资源包括第一预留资源和第二预留资源为例介绍。
在情况1中,第一资源为第一预留资源,则第一PSFCH的发送方式为以第一序列发送第一资源冲突指示且不发送第一HARQ反馈。
在情况2中,第一资源为第二预留资源,则第一PSFCH的发送方式为以第二序列发送第一资源冲突指示且不发送第一HARQ反馈。
在情况3中,第一资源包含第一预留资源和第二预留资源,则第一PSFCH的发送方式为以第三序列发送第一资源冲突指示。
需要说明的是,在上述情况1至情况3中,第一终端设备可以按照传统的HARQ反馈方式,基于是否接收到目标数据在第一PFSCH中发送ACK或NACK。当然,如果希望进一步减少PSFCH占用的比特数,第二终端设备还可以进一步判断是否需要在第一PSFCH中发送HARQ反馈。在一些实现方式中,如果存在冲突的预留资源为重传资源,并且第一终端设备未成功接收目标数据,此时,对于第二终端设备而言更加关心的是存在冲突的预留资源到底是哪些,因此,为了减少第一PSFCH占用的资源,第一终端设备可以仅向第二终端设备发送第一冲突指示信息,而并不发送第一HARQ反馈。例如,在上述情况1至情况3中,如果第一终端设备未成功接收目标数据,第二终端设备可以不向第一终端设备发送第一HARQ反馈,即不向第一终端设备发送NACK。在另一些实现方式中,如果第一资源为目标数据的重传资源,并且第一终端设备已经成功接收目标数据,也就是说,目标数据传输的目的已经达成,此时,目标数据的重传资源(即上述第一资源)是不是存在冲突,对于第二终端设备其实是不用太过关注的,因此,在这种情况下,为了减少第一PSFCH占用的资源,第一终端设备可以不向第二终端设备发送第一PSFCH。
另外,在预留资源不存在冲突的情况下,可以按照传统的HARQ反馈方式通过PSFCH向第二终端设备发送HARQ反馈,为了简洁,下文不再赘述。
为了便于理解,下文结合表1和表2以存在冲突的预留资源为重传资源为例,介绍本申请实施例的通信方法。表1示出了本申请实施例中存在冲突的预留资源与PSFCH的发送方式之间的关联关系。表2示出了本申请另一实施例中存在冲突的预留资源与PSFCH的发送方式之间的关联关系。
需要说明的是,若表1中的关联关系适用于第一终端设备为第二终端设备的目标接收终端时,表2中的关联关系适用于第一终端设备为第二终端设备的非目标接收终端。当然,若表1中的关联关系适用于第一终端设备为第二终端设备的非目标接收终端时,表2中的关联关系适用于第一终端设备为第二终端设备的目标接收终端。
表1
Figure PCTCN2021137899-appb-000007
Figure PCTCN2021137899-appb-000008
假设第二终端设备预留的预留资源1和预留资源2用于目标数据的重传,参见表1,在情况1中,若对于第一终端设备而言目标数据的HARQ反馈为ACK,且预留资源1、预留资源2不存在冲突,那么第一终端设备可以在第一PSFCH中按照传统的HARQ反馈发送第一HARQ反馈的发送方式。在一种实现方式中,若第一终端设备支持ACK/NACK-based HARQ反馈,则第一终端设备可以通过第一PSFCH向第二终端设备发送ACK。在另一种实现方式中,若第一终端设备支持NACK-only based HARQ反馈,则第一终端设备可以不在第一PSFCH中发送第一HARQ反馈,或者说,不发送第一PSFCH。
在情况2中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1和预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中仅包含NACK。
在情况3中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1存在冲突(即上述第一资源为预留资源1),且预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中的第一资源冲突指示的序列为第一序列。
在情况4中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1不存在冲突,且预留资源2存在冲突(即上述第一资源为预留资源2),那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中的第一资源冲突指示的序列为第二序列。
在情况5中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1、预留资源2存在冲突(即上述第一资源为预留资源1和预留资源2),那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中的第一资源冲突指示的序列为第三序列。
另外,如上文介绍,若第一终端设备成功接收目标数据,说明传输目标数据的目的已经达成,此时,如果预留资源1和预留资源2为重传资源,第二终端设备其实并不关心上述重传资源是否存在冲突,如果为了减少传输第一PSFCH占用的开销,第一终端设备可以不向第二终端设备发送第一PSFCH。
表2
Figure PCTCN2021137899-appb-000009
假设第二终端设备预留的预留资源1和预留资源2用于目标数据的重传,参见表2,在情况1中,若对于第一终端设备而言目标数据的HARQ反馈为ACK,且预留资源1、预留资源2不存在冲突,那么第一终端设备可以在第一PSFCH中按照传统的HARQ反馈发送第一HARQ反馈的发送方式。在一种实现方式中,若第一终端设备支持ACK/NACK-based HARQ反馈,则第一终端设备可以通过第一PSFCH向第二终端设备发送ACK。在另一种实现方式中,若第一终端设备支持NACK-only based HARQ反馈,则第一终端设备可以不在第一PSFCH中发送第一HARQ反馈,或者说,不发送第一PSFCH。
在情况2中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1和预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中仅包含NACK。
在情况3中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1存在冲突(即上述第一资源为预留资源1),且预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中包含NACK以及第一序列的第一资源冲突指示。
在情况4中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1不存在冲突,且预留资源2存在冲突(即上述第一资源为预留资源2),那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH包含NACK以及第二序列的第一资源冲突指示。
在情况5中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1、预留资源2存在冲突(即上述第一资源为预留资源1和预留资源2),那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH包含NACK以及第三序列的第一资源冲突指示。
需要说明的是,在一些场景中,终端设备可能并不支持同时通过PSFCH发送HARQ反馈和资源冲突指示,此时,由于资源冲突指示的方案属于增强方案,第二终端设备可以仅通过PSFCH发送HARQ反馈。例如,在上述表2所示的关联关系中,如果第二终端设备不支持通过第一PFSCH同时进行第一HARQ反馈和第一资源冲突指示的发送,那么第二终端设备可以仅通过第一PSFCH发送第一HARQ反馈。
在组合方式1-2中,通过资源冲突指示的序列与HARQ反馈方式的组合的多种情况,来关联不同的预留资源存在冲突的情况。其中,存在冲突的预留资源可以是目标数据的重传资源,也可以是新数据的初传资源,本申请实施例对此不作限定。下文以多个预留资源包括预留资源1和预留资源2为例介绍。
在情况1中,第一资源为第一预留资源,则第一PSFCH的发送方式为以第一序列发送第一资源冲突指示且不发送第一HARQ反馈。
在情况2中,第一资源为第二预留资源,则第一PSFCH的发送方式为以第二序列发送第一资源冲突指示且不发送第一HARQ反馈。
在上述情况1至情况2中,第一终端设备可以按照传统的HARQ反馈方式,基于是否接收到目标数据来发送ACK或NACK。当然,如果希望进一步减少第一PSFCH占用的比特数,第二终端设备还可以进一步判断是否需要在第一PSFCH中发送HARQ反馈。在一些实现方式中,如果存在冲突的预留资源为重传资源,并且第一终端设备未成功接收目标数据,此时,对于第二终端设备而言更加关心的是存在冲突的预留资源到底是哪些,因此,为了减少第一PSFCH占用的资源,第一终端设备可以仅向第二终端设备发送第一冲突指示信息,而并不反馈第一HARQ反馈。例如,在上述情况1和情况2中,如果第一终端设备未成功接收目标数据,第二终端设备可以不向第一终端设备发送第一HARQ反馈,即不向第一终端设备发送NACK。在另一些实现方式中,如果第一资源为目标数据的重传资源,并且第一终端设备已经成功接收目标数据,也就是说,目标数据传输的目的已经达成,此时,目标数据的重传资源(即上述第一资源)是不是存在冲突,对于第二终端设备其实是不用太过关注的,因此,在这种情况下,为了减少第一PSFCH占用的资源,第一终端设备可以不向第二终端设备发送第一PSFCH。
在情况3中,若第一终端设备未成功接收目标数据,且第一资源包含第一预留资源和第二预留资源,则资源冲突指示的发送方式为以第一序列发送第一资源冲突指示,且HARQ反馈的发送方式为发送HARQ反馈。
在一些情况下,如果第一终端设备支持ACK/NACK-based HARQ反馈,第一终端设备反馈的第一HARQ反馈为NACK,也就是说,第一终端设备可以向第二终端设备发送第一PSFCH,其中,第一PSFCH包括第一序列的第一资源冲突指示以及NACK。在另一些情况下,如果第一终端设备支持NACK-only based HARQ反馈,第一终端设备需要向第二终端设备反馈第一序列的第一资源冲突指示以及ACK。因为在这种NACK-only based HARQ反馈的场景中,目标数据的接收端(包括第一终端设备的目标接收终端和非目标接收终端),都是通过相同的侧行资源向第二终端设备发送NACK,并且,第二终端设备无法区分NACK的发送端是哪个终端设备,也就是说,一旦有终端设备未成功接收目标数据时,就会向第二终端设备发送NACK,此时,第二终端设备再接收到第一终端设备发送的第一序列的资源冲突指示后(即组合方式1-2的情况1),第二终端设备将无法区分是情况1还是情况3,因此,为了避免这种情况,需要配置第一终端设备在情况3中即使未成功接收目标数据,还是需要向第二终端设备发送ACK以和组合方式1-2的情况1进行区分。
另外,由于在NACK-only based HARQ反馈中并没规定ACK的序列,此时,可以直接采用ACK/NACK-based HARQ反馈中指示ACK的序列来反馈ACK,当然,还可以采用其他序列来指示ACK,本申请实施例对此不作限定。
需要说明的是,在预留资源不存在冲突的情况下,上述第一PSFCH可以按照传统的HARQ反馈方式向第二终端设备发送第一PSFCH,为了简洁,下文不再赘述。
为了便于理解,下文结合表3以存在冲突的预留资源为重传资源为例,介绍本申请实施例的通信方法。表3示出了本申请另一实施例中存在冲突的预留资源与PSFCH的发送方式之间的关联关系。
表3
Figure PCTCN2021137899-appb-000010
假设第二终端设备预留的预留资源1和预留资源2用于目标数据的重传,参见表3,在情况1中,若对于第一终端设备而言目标数据的HARQ反馈为ACK,且预留资源1、预留资源2不存在冲突,那么第一终端设备可以在第一PSFCH中按照传统的HARQ反馈发送第一HARQ反馈的发送方式。在一种实现方式中,若第一终端设备支持ACK/NACK-based HARQ反馈,则第一终端设备可以通过第一PSFCH向第二终端设备发送ACK。在另一种实现方式中,若第一终端设备支持NACK-only based HARQ反馈,则第一终端设备可以不在第一PSFCH中发送第一HARQ反馈,或者说,不发送第一PSFCH。
在情况2中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1和预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中仅包含NACK。
在情况3中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1存在冲突(即上述第一资源为预留资源1),且预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中的第一资源冲突指示的序列为第一序列。
在情况4中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1不存在冲突,且预留资源2存在冲突(即上述第一资源为预留资源2),那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中的第一资源冲突指示的序列为第二序列。
在情况5中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1、预留资源2存在冲突(即上述第一资源为预留资源1和预留资源2),那么在场景1中,如果第一终端设备支持ACK/NACK-based HARQ反馈,第一终端设备反馈的HARQ反馈为NACK,也就是说,第一终端设备可以向第二终端设备发送第一PSFCH,其中,第一PSFCH包括第一序列的第一资源冲突指示以及NACK。在场景2中,如果第一终端设备支持NACK-only based HARQ反馈,第一终端设备需要向第二终端设备反馈第一序列的第一资源冲突指示以及ACK。具体的配置原因可以参见上文介绍,为了简洁,在此不再赘述。
另外,如上文介绍,若第一终端设备成功接收目标数据,说明传输目标数据的目的已经达成,此时,如果预留资源1和预留资源2为重传资源,第二终端设备其实并不关心上述重传资源是否存在冲突,如果为了减少传输第一PSFCH占用的开销,第一终端设备可以不向第二终端设备发送第一PSFCH。
需要说明的是,表3所示的关联关系可以应用于第二终端设备的目标接收终端,此时,为了便于区分,第二终端设备的非目标接收终端设备可以采用表2所示的关联关系。当然,第二终端设备的目标接收终端也可以采用表2所示的关联关系,此时,第二终端设备的非目标接收终端可以采用表3所示的关联关系。
另外,在表2所示的关联关系与表3所示的关联关系配合使用时,可以看到,在一些情况下,第一终端设备都会向第二终端设备发送第一HARQ反馈和第一资源冲突指示,例如,表3中的情况5和表2中的情况3至5,此时,为了便于第二终端设备区分第一PSFCH的发送端是目标接收终端还是非目标接收终端,以判断是否需要重传目标数据,可以配置目标接收终端在需要传输HARQ反馈时,HARQ反馈的序列与资源冲突指示的序列相同,配置非目标接收终端传输HARQ反馈时,HARQ反馈的序列与资源冲突指示的序列不相同。当然,上述目标接收终端和非目标接收终端之间的配置方式可以互换。
上文介绍了可以使用不同的序列发送第一资源冲突指示,在一些实现方式中,上述序列可以采用循环移位的方式生成。例如,上述序列可以通过公式
Figure PCTCN2021137899-appb-000011
确定,其中,α表示循环移位的数量;
Figure PCTCN2021137899-appb-000012
表示一个RB内包含的子载波的个数,通常,
Figure PCTCN2021137899-appb-000013
的值为12;m 0可以由标准预定义,或者由网络配置或预配置;
Figure PCTCN2021137899-appb-000014
表示根据冲突指示序列的发送时隙和发送符号确 定的随机数;m cs的取值基于需要生成的序列确定,或者说m cs表示待生成序列的标识。例如,如果待生成的序列为第一序列,m cs的取值可以为0;如果待生成的序列为第二序列,m cs的取值可以为1;如果待生成的序列为第三序列,m cs的取值可以为3。另外,如果PSFCH的发送方式与存在冲突的预留资源之间的关联关系采用了三种序列,相应地,在PSFCH资源池内配置的一个频域单元(例如,PRB)内允许码分复用的序列对数应不小于2。
按照已知的资源冲突指示的传输方式,当预留资源存在冲突时,两条资源冲突指示指示的存在冲突的预留资源会包含一些相同的预留资源。例如,假设预留资源1在时域上早于预留资源2,预留资源2在时域上在于预留资源1,并且预留资源1、预留资源2以及预留资源3上存在冲突。在资源冲突指示1中指示存在冲突的预留资源为预留资源1和预留资源2,在资源冲突指示2中指示存在冲突的预留资源为预留资源2和预留资源3。其中,预留资源2分别在资源冲突指示1和资源冲突指示2中被指示了两次。因此,为了减少资源冲突指示的序列的种类,可以在资源冲突指示1中并不指示存在冲突的预留资源2,因为在资源冲突指示2中会重新指示预留资源2上存在冲突。即,在第一预留资源不存在冲突且第二预留资源存在冲突的情况下,第一终端设备不向第二终端设备发送第一PSFCH,其中第二预留资源在时域上位于第一预留资源之后。也就是说,在表1至表3所示的情况4中,第一PSFCH的发送方式为不发送第一PSFCH。
为了便于理解,下文结合表4以存在冲突的预留资源为重传资源为例,介绍本申请另一实施例的PSFCH的发送方式与存在冲突的预留资源之间的关联关系。
表4
Figure PCTCN2021137899-appb-000015
假设第二终端设备预留的预留资源1和预留资源2用于目标数据的重传,参见表4,在情况1中,若对于第一终端设备而言目标数据的HARQ反馈为ACK,且预留资源1、预留资源2不存在冲突,那么第一终端设备可以在第一PSFCH中按照传统的HARQ反馈发送第一HARQ反馈的发送方式。在一种实现方式中,若第一终端设备支持ACK/NACK-based HARQ反馈,则第一终端设备可以通过第一PSFCH向第二终端设备发送ACK。在另一种实现方式中,若第一终端设备支持NACK-only based HARQ反馈,则第一终端设备可以不在第一PSFCH中发送第一HARQ反馈,或者说,不发送第一PSFCH。
在情况2中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1和预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中仅包含NACK。
在情况3中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1存在冲突(即上述第一资源为预留资源1),且预留资源2不存在冲突,那么第一终端设备无需。
在情况4中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1不存在冲突,且预留资源2存在冲突(即上述第一资源为预留资源2),那么第一终端设备无需发送第一PSFCH。
在情况5中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1、预留资源2存在冲突(即上述第一资源为预留资源1和预留资源2),那么在方式1中,如果第一终端设备支持ACK/NACK-based HARQ反馈,第一终端设备反馈的HARQ反馈为NACK,也就是说,第一终端设备可以向第二终端设备发送第一PSFCH,其中,第一PSFCH包括第一序列的第一资源冲突指示以及NACK。如果第一终端设备支持NACK-only based HARQ反馈,第一终端设备需要向第二终端设备反馈第一序列的第一资源冲突指示以及ACK。具体的配置原因可以参见上文介绍,为了简洁,在此不再赘述。在方式2中,第一终端设备可以发送第二序列的资源冲突指示。
在组合方式2中,资源冲突指示的发送方式包含资源冲突指示占用的频域单元,HARQ反馈的发 送方式包含是否HARQ反馈。
在一种实现方式中,若多个预留资源中存在冲突的预留资源不同则资源冲突指示占用的频域单元不同。或者说,不同的频域单元可以对应不同的存在冲突的预留资源。其中,存在冲突的预留资源可以是目标数据的重传资源,也可以是新数据的初传资源,本申请实施例对此不作限定。下文以多个预留资源包括第一预留资源和第二预留资源为例介绍。
在情况1中,第一资源为第一预留资源,则第一PSFCH的发送方式为在第一频域单元发送第一资源冲突指示。
在情况2中,第一资源为第二预留资源,则第一PSFCH的发送方式为在第二频域单元发送第一资源冲突指示。
在情况3中,第一资源包含第一预留资源和第二预留资源,则第一PSFCH的发送方式为子第一频域单元和第二频域单元发送第一资源冲突指示。
需要说明的是,在上述情况1至情况3中,第一终端设备可以按照传统的HARQ反馈方式,基于是否接收到目标数据来发送ACK或NACK。当然,如果希望进一步减少PSFCH占用的比特数,第二终端设备还可以进一步判断是否需要在PSFCH中发送HARQ反馈。在一些实现方式中,如果存在冲突的预留资源为重传资源,并且第一终端设备未成功接收目标数据,此时,对于第二终端设备而言更加关心的是存在冲突的预留资源到底是哪些,因此,为了减少PSFCH占用的资源,第一终端设备可以仅向第二终端设备发送第一冲突指示信息,而并不反馈HARQ反馈。例如,在上述情况1至情况3中,如果第一终端设备未成功接收目标数据,第二终端设备可以不向第一终端设备发送HARQ反馈,即不向第一终端设备发送NACK。在另一些实现方式中,如果第一资源为目标数据的重传资源,并且第一终端设备已经成功接收目标数据,也就是说,目标数据传输的目的已经达成,此时,目标数据的重传资源(即上述第一资源)是不是存在冲突,对于第二终端设备其实是不用太过关注的,因此,在这种情况下,为了减少PSFCH占用的资源,第一终端设备可以不向第二终端设备发送第一PSFCH。
另外,在预留资源不存在冲突的情况下,上述第一PSFCH可以按照传统的HARQ反馈方式向第二终端设备发送第一PSFCH,为了简洁,下文不再赘述。
为了便于理解,下文结合表5和表6以存在冲突的预留资源为重传资源为例,介绍本申请另一实施例的通信方法。表5示出了本申请实施例中存在冲突的预留资源与PSFCH的发送方式之间的关联关系。表6示出了本申请另一实施例中存在冲突的预留资源与PSFCH的发送方式之间的关联关系。
需要说明的是,若表5中的关联关系适用于第一终端设备为第二终端设备的目标接收终端时,表6中的关联关系适用于第一终端设备为第二终端设备的非目标接收终端。当然,若表5中的关联关系适用于第一终端设备为第二终端设备的非目标接收终端时,表6中的关联关系适用于第一终端设备为第二终端设备的目标接收终端。
表5
Figure PCTCN2021137899-appb-000016
假设第二终端设备预留的预留资源1和预留资源2用于目标数据的重传,参见表5,在情况1中,若对于第一终端设备而言目标数据的HARQ反馈为ACK,且预留资源1、预留资源2不存在冲突,那么第一终端设备可以在第一PSFCH中按照传统的HARQ反馈发送第一HARQ反馈的发送方式。在一种实现方式中,若第一终端设备支持ACK/NACK-based HARQ反馈,则第一终端设备可以通过第一PSFCH向第二终端设备发送ACK。在另一种实现方式中,若第一终端设备支持NACK-only based HARQ反馈,则第一终端设备可以不在第一PSFCH中发送第一HARQ反馈,或者说,不发送第一PSFCH。
在情况2中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1和预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中仅包含NACK。
在情况3中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1存在冲突(即上述第一资源为预留资源1),且预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送 第一PSFCH,其中第一PSFCH中的第一资源冲突指示的占用第一频域单元。
在情况4中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1不存在冲突,且预留资源2存在冲突(即上述第一资源为预留资源2),那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中的第一资源冲突指示占用第二频域单元。
在情况5中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1、预留资源2存在冲突(即上述第一资源为预留资源1和预留资源2),那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中的第一资源冲突指示占用第一频域单元以及第二频域单元。
另外,如上文介绍,若第一终端设备成功接收目标数据,说明传输目标数据的目的已经达成,此时,如果预留资源1和预留资源2为重传资源,第二终端设备其实并不关心上述重传资源是否存在冲突,如果为了减少传输PSFCH占用的开销,第一终端设备可以不向第二终端设备发送第一PSFCH。
如上文介绍,按照已知的资源冲突指示的传输方式,当预留资源存在冲突时,两条资源冲突指示指示的存在冲突的预留资源会包含一些相同的预留资源。例如,假设预留资源1在时域上早于预留资源2,预留资源2在时域上在于预留资源1,并且预留资源1、预留资源2以及预留资源3上存在冲突。在资源冲突指示1中指示存在冲突的预留资源为预留资源1和预留资源2,在资源冲突指示2中指示存在冲突的预留资源为预留资源2和预留资源3。其中,预留资源2分别在资源冲突指示1和资源冲突指示2中被指示了两次。因此,为了减少资源冲突指示占用的侧行资源,可以在资源冲突指示1中并不指示存在冲突的预留资源2,因为在资源冲突指示2中会重新指示预留资源2上存在冲突。即,在第一预留资源不存在冲突且第二预留资源存在冲突的情况下,第一终端设备不向第二终端设备发送第一PSFCH,其中第二预留资源在时域上位于第一预留资源之后。也就是说,在表5所示的情况4中,第一PSFCH的发送方式为不发送第一PSFCH。
为了便于理解,下文结合表6以存在冲突的预留资源为重传资源为例,介绍本申请另一实施例的PSFCH的发送方式与存在冲突的预留资源之间的关联关系。
表6
Figure PCTCN2021137899-appb-000017
假设第二终端设备预留的预留资源1和预留资源2用于目标数据的重传,参见表6,在情况1中,若对于第一终端设备而言目标数据的HARQ反馈为ACK,且预留资源1、预留资源2不存在冲突,那么第一终端设备可以在第一PSFCH中按照传统的HARQ反馈发送第一HARQ反馈的发送方式。在一种实现方式中,若第一终端设备支持ACK/NACK-based HARQ反馈,则第一终端设备可以通过第一PSFCH向第二终端设备发送ACK。在另一种实现方式中,若第一终端设备支持NACK-only based HARQ反馈,则第一终端设备可以不在第一PSFCH中发送第一HARQ反馈,或者说,不发送第一PSFCH。
在情况2中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1和预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中仅包含NACK。
在情况3中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1存在冲突(即上述第一资源为预留资源1),且预留资源2不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中的第一资源冲突指示的占用第一频域单元。
在情况4中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1不存在冲突,且预留资源2存在冲突(即上述第一资源为预留资源2),那么第一终端设备可以不向第二终端设备发送第一PSFCH。
在情况5中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1、预留资源2存在冲突(即上述第一资源为预留资源1和预留资源2),那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中的第一资源冲突指示占用第二频域单元。
另外,如上文介绍,若第一终端设备成功接收目标数据,说明传输目标数据的目的已经达成,此时,如果预留资源1和预留资源2为重传资源,第二终端设备其实并不关心上述重传资源是否存在冲突,如果为了减少传输第一PSFCH占用的开销,第一终端设备可以不向第二终端设备发送第一PSFCH。
需要说明的是,上文介绍的组合方式2中所示的方法可以适用于第二终端设备的目标接收终端或者第二终端设备的非目标接收终端,本申请实施例对此不作限定。如果为了便于第二终端设备区分第一PSFCH的发送端是目标接收终端还是非目标接收终端,可以配置两类终端设备在不同的频域单元上发送第一PSFCH。当然,如果不需要区分是目标接收终端还是非目标接收终端,也可以不用区分频域单元。
如上文介绍,在资源分配增强方案的方式二中,终端设备1(又称“第一终端设备”)在检测到终端设备2(又称“第二终端设备”)的预留资源存在冲突时,终端设备1可以向终端设备2发送PSFCH(又称“第一PSFCH”)以携带资源冲突指示。然而,如上文介绍用于传输PSFCH的资源较少,并且真正传输PSFCH时,PSFCH通常在时域上仅占用一个符号,在频域上仅占用一个PRB,因此,PSFCH的容量通常仅有1比特。如果直接在资源冲突指示中直接携带存在冲突的预留资源的标识,会导致用于传输PSFCH的资源无法承载同时承载资源冲突指示和HARQ反馈。
因此,为了减少PSFCH占用的比特数量,本申请提供了一种通信方法,可以基于存在冲突的预留资源为目标数据的重传资源还是初传资源,来确定第一PFSCH的发送方式。下文结合图7介绍本申请另一实施例的通信方法。
图7是本申请实施例的通信方法的示意性流程图。图7所示的方法包括步骤S710至步骤S740。
在步骤S710中,第二终端设备向第一终端设备发送资源指示信息和目标数据。
其中,资源指示信息用于指示第二终端设备预留的多个预留资源,多个预留资源中包括第一预留资源。
在步骤S720中,在第一预留资源存在冲突的情况下,第一终端设备基于第一预留资源为目标数据的重传资源或初传资源,确定第一物理侧行反馈信道PSFCH的发送方式。
其中,第一PSFCH的发送方式包括发送第一PSFCH和不发送第一PSFCH,并且,在发送第一PSFCH时,上述第一PSFCH的发送方式还包括在第一PSFCH中承载第一资源冲突指示和/或针对目标数据的第一HARQ反馈,第一资源冲突指示用于指示第一预留资源存在冲突。
在一些实现方式中,上述第一预留资源可以满足以下条件中的任一种:第一预留资源为第二终端设备通过资源指示信息预留的下一个用于目标数据重传的侧行资源。第一预留资源为多个预留资源中在时域上与第一资源指示信息占用的时域单元最近的侧行资源,此时,第一预留资源为可以为目标数据的重传资源或者初传资源,本申请实施例对此不作限定。
在步骤S730中,第一终端设备以第一PSFCH的发送方式向第二终端设备发送第一PFSCH。
需要说明的是,上述第一PSFCH可以包含多个PSFCH,在下文介绍的一些情况中(例如,表7的情况4中的方式一;表8中的情况4)当第一终端设备需要同时发送第一HARQ反馈和第一资源冲突指示时,上述第一PSFCH的数量可以包含2个PSFCH。
上述第一PSFCH还可以包含1个PSFCH,在下文介绍的一些场景中(例如,表7中的情况1-3;表8中情况1-3),第一终端设备仅需要反馈第一资源冲突指示或第一HARQ反馈,此时,第一PSFCH可以包含一个PSFCH。
在步骤S740中,第二终端设备基于第一PSFCH的发送方式,确定存在冲突的预留资源(即第一预留资源)。
在第二终端设备确定存在冲突的预留资源后,可以基于预设规则进行资源重选,并在重新选择的侧行资源上进行数据传输。本申请实施例对此不作具体限定。如果第二终端设备确定存在冲突的预留资源后,第二终端设备可以结合第一终端设备的HARQ反馈基于上文介绍的侧行资源的选择方式进行资源重选与数据传输。在一些实现方式中,如果第一PSFCH中携带第一资源冲突指示以及第一HARQ反馈为ACK,且存在冲突的预留资源(即第一预留资源)为目标数据的重传资源,则第二终端设备可以停止发送目标数据。在另一些实现方式中,如果第一PSFCH中携带第一资源冲突指示以及第一HARQ反馈为NACK,则第二终端设备可以进行资源重选,并通过重选的预留资源来传输目标数据。在另一些实现方式中,如果第一PSFCH中携带第一资源冲突指示,且存在冲突的预留资源为初传资源,那么无论第一终端设备是否成功接收到目标数据,第二终端设备都进行资源重选,并通过重选的侧行资源来发送新的数据。
通常,如果存在冲突的预留资源为初传资源,那么说明目标数据的传输进程已经结束,对于第二终端设备而言,在这种情况下,第二终端设备并不关心第一终端设备是否成功接收目标数据,因此,为了降低第一PSFCH占用的侧行资源,可以配置第二终端设备在向第一终端设备发送的第一PSFCH中仅承载第一资源冲突指示,而并不携带HARQ反馈。
即,在情况1中,若第一终端设备成功接收目标数据,且第一预留资源为初传资源,第一PSFCH的发送方式为在第一PSFCH中承载第一资源冲突指示。
在情况2中,若第一终端设备未成功接收目标数据,且第一预留资源为初传资源,第一PSFCH的发送方式为在第一PSFCH中承载第一资源冲突指示。
如果第一终端设备未成功接收目标数据,并且,存在冲突的预留资源为目标数据的重传资源,那么这种情况下,由于第二终端设备需要基于第一终端设备对目标数据的接收结果来确定是否重传目标数据,此时,第一终端设备需要在第一PSFCH中携带第一HARQ反馈和第一资源冲突指示。
即,在情况4中,若第一终端设备未成功接收目标数据,且第一预留资源为重传资源,第一PSFCH的发送方式为在第一PSFCH中承载第一资源冲突指示以及第一HARQ反馈。
如果第一终端设备成功接收目标数据,那么在第一终端设备传输目标数据的目的已经完成,对于第二终端设备而言,其实并不关心目标数据的重传资源上是否存在冲突,那么在这种情况下,为了减少第一PSFCH占用的侧行资源,第一终端设备可以不向第二终端设备发送第一PSFCH。
为了便于理解,下文结合表7和表8以存在冲突的预留资源为预留资源1为例,介绍本申请实施例的PSFCH的发送方式与存在冲突的预留资源之间的关联关系。
需要说明的是,若表7中的关联关系适用于第一终端设备为第二终端设备的目标接收终端时,表8中的关联关系适用于第一终端设备为第二终端设备的非目标接收终端。当然,若表7中的关联关系适用于第一终端设备为第二终端设备的非目标接收终端时,表8中的关联关系适用于第一终端设备为第二终端设备的目标接收终端。
表7
Figure PCTCN2021137899-appb-000018
假设第二终端设备预留的预留资源为预留资源1,参见表7,在情况1中,若对于第一终端设备而言目标数据的HARQ反馈为ACK,且预留资源1不存在冲突,那么第一终端设备可以在第一PSFCH中按照传统的HARQ反馈发送第一HARQ反馈的发送方式。在一种实现方式中,若第一终端设备支持ACK/NACK-based HARQ反馈,则第一终端设备可以通过第一PSFCH向第二终端设备发送ACK。在另一种实现方式中,若第一终端设备支持NACK-only based HARQ反馈,则第一终端设备可以不在第一PSFCH中发送第一HARQ反馈,或者说,不发送第一PSFCH。
在情况2中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1为初传资源且存在冲突(即上述第一预留资源为预留资源1),那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中仅第一资源冲突指示,第一资源冲突指示用于指示预留资源1存在冲突。
在情况3中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH仅携带NACK。
在情况4中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1存在冲突(即上述第一预留资源为预留资源1),那么在方式一中,若预留资源1为目标数据的重传资源,则在第一终端设备向第二终端设备发送的第一PSFCH中携带第一资源冲突指示和NACK。在方式二;若预留资源1为初传资源,则在第一终端设备向第二终端设备发送的第一PSFCH中仅携带第一资源冲突指示。
另外,如上文介绍,若第一终端设备成功接收目标数据,说明传输目标数据的目的已经达成,此时,如果预留资源1为重传资源,第二终端设备其实并不关心上述重传资源是否存在冲突,如果为了减少传输PSFCH占用的开销,第一终端设备可以不向第二终端设备发送第一PSFCH。
表8
Figure PCTCN2021137899-appb-000019
Figure PCTCN2021137899-appb-000020
假设第二终端设备预留的预留资源为预留资源1,参见表7,在情况1中,若对于第一终端设备而言目标数据的HARQ反馈为ACK,且预留资源1不存在冲突,那么第一终端设备可以在第一PSFCH中按照传统的HARQ反馈发送第一HARQ反馈的发送方式。在一种实现方式中,若第一终端设备支持ACK/NACK-based HARQ反馈,则第一终端设备可以通过第一PSFCH向第二终端设备发送ACK。在另一种实现方式中,若第一终端设备支持NACK-only based HARQ反馈,则第一终端设备可以不在第一PSFCH中发送第一HARQ反馈,或者说,不发送第一PSFCH。
在情况2中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,且预留资源1为初传资源且存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH中仅第一资源冲突指示,第一资源冲突指示用于指示预留资源1存在冲突。
在情况3中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1不存在冲突,那么第一终端设备可以向第二终端设备发送第一PSFCH,其中第一PSFCH仅携带NACK。
在情况4中,若对于第一终端设备而言目标数据的HARQ反馈为NACK,预留资源1存在冲突(即上述第一资源为预留资源1),那么无论预留资源1为目标数据的重传资源还是初传资源,则在第一终端设备向第二终端设备发送的第一PSFCH中携带第一资源冲突指示和NACK。
需要说明的是,如果第二终端设备并不支持在第一PSFCH中同时反馈第一资源冲突指示和第一HARQ(例如,NACK),那么可以配置第二终端设备仅在第一PSFCH中仅携带第一HARQ反馈。
另外,如上文介绍,若第一终端设备成功接收目标数据,说明传输目标数据的目的已经达成,此时,如果预留资源1为重传资源,第二终端设备其实并不关心上述重传资源是否存在冲突,如果为了减少传输第一PSFCH占用的开销,第一终端设备可以不向第二终端设备发送第一PSFCH。
如上文介绍,在资源分配增强方案的方式二中,终端设备1(又称“第一终端设备”)在检测到终端设备2(又称“第二终端设备”)的预留资源存在冲突时,终端设备1可以向终端设备2发送PSFCH以携带资源冲突指示。然而,如果PSFCH占用的时域单元与资源指示信息的占用时域单元较近,那么第一终端设备可能来不及解码资源指示信息,即无法确认第二终端设备的预留资源,进而无法判断预留资源上是否存在冲突。另外,如果PSFCH的占用的时域单元与预留资源所在的时域单元较近,第二终端设备可能来不及解码资源冲突指示,无法确定预留资源上是否存在冲突。
因此,为了避免上述问题,本申请实施例还提供一种通信方法,以合理规划资源指示信息占用的时域单元、资源冲突指示占用的时域单元、以及预留资源所在的时域单元之间的时域位置关系。下文结合图8介绍本申请实施例的通信方法的流程。图8所示的方法包括步骤S810和步骤S820。需要说明的是,图8所示的通信方法可以与上文介绍的任意一种通信方法结合使用,为了简洁,下文不再详细赘述。
在步骤S810中,第二终端设备在第一时域单元内向第一终端设备发送资源指示信息。
其中,资源指示信息用于指示第二终端设备在第二时域单元内的一个或多个预留资源。在一些实现方式中,上述资源指示信息可以是通过SCI发送的。在另一些实现方式中,上述资源指示信息可以是上文图6和图7中所介绍的第一资源指示信息。
在步骤S820中,第一终端设备在第三时域单元上向第二终端设备发送资源冲突指示。
上述资源冲突指示用于指示多个预留资源中存在冲突的预留资源。在一些实现方式中,上述资源冲突指示可以是通过PFSCH发送的。在另一些实现方式中,上述资源指示信息可以是上文图6和图7中所介绍的第一资源冲突指示。
上述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:第一时域单元在时域上的位置;第二时域单元在时域上的位置;第一终端设备解码资源指示信息所需的时间;第一终端设备准备资源冲突指示所需的时间;第二终端设备解码资源冲突指示所需的时间;以及第二终端设备准备在预留资源上传输数据所需的时间。
在一些实现方式中,第三时域单元与第一时域单元在时域上的间隔可以是基于第一终端设备准备资源冲突指示所需的时间以及第一终端设备解码资源指示信息所需的时间确定的。例如,第三时域单元与第一时域单元在时域上的间隔不小于(大于或等于)第一终端设备准备资源冲突指示所需的时间以及第一终端设备解码资源指示信息所需的时间之和。
在另一些实现方式中,第三时域单元与第二时域单元在时域上的间隔可以是基于第二终端设备解 码资源冲突指示所需的时间以及第二终端设备准备在预留资源上传输数据所需的时间确定的。例如,第三时域单元与第二时域单元在时域上的间隔不小于(或者说,大于或等于)基于第二终端设备解码资源冲突指示所需的时间以及第二终端设备准备在预留资源上传输数据所需的时间之和。
需要说明的是,上述两个时域单元之间的时间间隔可以是两个时域单元的中间位置之间的时间间隔,还可以是第一个时域单元的结束位置与第二个时域单元的起始位置之间的时间间隔,本申请实施例对此不作限定。例如,第三时域单元与第一时域单元在时域上的间隔,可以是第一时域单元的结束位置与第三时域单元的起始位置之间的时间间隔。第三时域单元与第二时域单元在时域上的间隔,可以是第三时域单元的结束位置与第二时域单元的起始位置之间的时间间隔。
在一些实现方式中,为了简化计算第二终端设备解码第一PSFCH所需的时间,解码第一PSFCH所需的时间可以基于目前协议中规定的第二终端设备解码侧行控制信息SCI所需的时间确定。
为了降低传输资源冲突指示信息占用的开销,上述资源冲突指示信息指示的存在冲突的预留资源可以是按照预设规则确定的,当然也可以是网络设备指定的,本申请实施例对此不作限定。在一些实现方式中,上述存在冲突的预留资源可以满足以下条件中的任一种:多个预留资源中的至少部分预留资源为初传资源;多个预留资源中的至少部分预留资源为重传资源;多个预留资源属于资源指示信息指示第二终端设备预留的资源集,多个预留资源中每个预留资源与资源指示信息占用的时频资源之间的距离小于第一距离,第一距离为资源集中除多个预留资源之外的其他预留资源与资源指示信息占用的时频资源之间的距离。
需要说明的是,上述第一时域单元、第二时域单元以及第三时域单元可以是时域上的任意单元,例如,可以是时隙、子帧、符号等。
为了便于理解,下文结合图9以时域单元为时隙为例介绍本申请实施例的通信方法。参见图9,假设资源指示信息占用的第一时域单元为时隙n,资源冲突指示占用的第二时域单元为时隙m,存在冲突的预留资源占用的第三时域单元为时隙f。且时隙n在时域上位于时隙f之前,时隙f在时域上位于时隙m之前,那么,按照上文介绍的三者之间的在时域上的间隔为:时隙n的结束位置与时隙f的起始位置之间的间隔大于或等于时间间隔1,其中时间间隔1的时间长度为第一终端设备准备资源冲突指示所需的时间以及第一终端设备解码资源指示信息所需的时间之和。时隙f的结束位置与时隙m的起始位置之间的间隔大于或等于时间间隔2,其中时间间隔2的时间长度为第二终端设备解码资源冲突指示所需的时间以及第二终端设备准备在预留资源上传输数据所需的时间之和。
上文结合图1至图9,详细描述了本申请的方法实施例,下面结合图10至图16,详细描述本申请的装置实施例。应理解,方法实施例的描述与装置实施例的描述相互对应,因此,未详细描述的部分可以参见前面方法实施例。
图10是本申请实施例的终端设备的示意图,图10所示的终端设备可以实现上文中第一终端设备的相应功能,图10所示的终端设备1000包括接收单元1010以及处理单元1020。
接收单元1010,用于接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源。
在所述第一资源内的预留资源存在冲突的情况下,处理单元1020,用于基于存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系,确定与所述第一资源关联的第一PSFCH的发送方式,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的资源冲突指示的序列,和/或,发送或不发送HARQ反馈。
在一种可能的实现方式中,所述第一PSFCH承载第一HARQ反馈时,承载所述资源冲突指示的序列与承载所述第一HARQ反馈的序列相同。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式为以第二序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈,其中,所述第二序列与所述第一序列不同。
在一种可能的实现方式中,若所述多个预留资源中存在冲突的预留资源不同,则所述资源冲突指示的序列不同。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源包括所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第三序列发送所述第一资源冲突指示。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源包括所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且发送所述第一HARQ反馈。
在一种可能的实现方式中,所述第一HARQ反馈为仅基于NACK的HARQ反馈,所述第一HARQ反馈为ACK。
在一种可能的实现方式中,所述第一资源内的预留资源为所述目标数据的重传资源。
图11是本申请实施例的终端设备的示意图,图11所示的终端设备可以实现上文中第一终端设备的相应功能,图11所示的终端设备1100包括接收单元1110和处理单元1120。
接收单元1110,用于接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源。
在所述第一资源内的预留资源存在冲突的情况下,处理单元1120,用于基于存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系,确定与所述第一资源关联的第一PSFCH的发送方式,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的冲突指示占用的频域单元,和/或,发送或不发送HARQ反馈。
在一种可能的实现方式中,若所述多个预留资源中存在冲突的预留资源不同则所述资源冲突指示占用的频域单元不同。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第一频域单元。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第二频域单元。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源包括第一预留资源和第二预留资源,则所述第一PSFCH的发送方式包括占用第一频域单元与第二频域单元发送所述第一资源冲突指示。
在一种可能的实现方式中,所述第一PSFCH的发送方式还包括不发送针对所述目标数据的第一HARQ反馈。
在一种可能的实现方式中,所述第一资源内的预留资源为所述目标数据的重传资源。
图12是本申请实施例的终端设备的示意图。图12所示的终端设备可以实现上文中第一终端设备的相应功能,图12所示的终端设备1200包括接收单元1210和处理单元1220。
接收单元1210,用于接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中包括第一预留资源;
在所述第一预留资源存在冲突的情况下,处理单元1220,基于所述第一预留资源为所述目标数据的重传资源或初传资源,确定第一物理侧行反馈信道PSFCH的发送方式,其中,所述第一PSFCH的发送方式包括在所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一预留资源存在冲突。
在一种可能的实现方式中,若所述第一终端设备成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为重传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示以及所述第一HARQ反馈。
图13是本申请实施例的终端设备的示意图。图13所示的终端设备可以实现上文中第一终端设备的相应功能,图13所示的终端设备1300包括接收单元1310和发送单元1320。
接收单元1310,用于在第一时域单元内接收第二终端设备发送的资源指示信息,所述资源指示信息用于指示所述第二终端设备在第二时域单元内的目标预留资源;
发送单元1320,用于在第三时域单元上向所述第二终端设备发送资源冲突指示,所述资源冲突指示用于指示所述目标预留资源中存在冲突的预留资源,其中,所述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:所述第一时域单元在时域上的位置;所述第二时域单元在时域上的位置;所述第一终端设备解码所述指示信息所需的时间;所述第一终端设备准备所述资源冲突指示所需的时间;所述第二终端设备解码所述资源冲突指示所需的时间;以及,所述第二终端设备准备在所述预留资源上传输数据所需的时间。
在一种可能的实现方式中,所述第一时域单元与所述第三时域单元之间的时间间隔是基于所述第一终端设备解码所述指示信息所需的时间以及所述第一终端设备准备所述资源冲突指示所需的时间确定的。
在一种可能的实现方式中,所述第三时域单元与所述第二时域单元之间的时间间隔是基于所述第二终端设备解码所述资源冲突指示所需的时间以及所述第二终端设备准备在所述预留资源上传输数据所需的时间确定的。
在一种可能的实现方式中,所述资源冲突指示承载于物理侧行反馈信道PSFCH。
在一种可能的实现方式中,所述第二终端设备解码所述第一PSFCH所需的时间基于所述第二终端设备解码侧行控制信息SCI所需的时间确定。
在一种可能的实现方式中,所述存在冲突的预留资源为多个预留资源,所述多个预留资源满足以下条件中的任一种:所述多个预留资源中的至少部分预留资源为初传资源;所述多个预留资源中的至少部分预留资源为重传资源;所述多个预留资源属于所述资源指示信息指示所述第二终端设备预留的资源集,所述多个预留资源中每个预留资源与所述资源指示信息占用的时频资源之间的距离小于第一距离,所述第一距离为所述资源集中除所述多个预留资源之外的其他预留资源与所述资源指示信息占用的时频资源之间的距离。
图14是本申请实施例的终端设备的示意图,图14所示的终端设备可以实现上文中第二终端设备的相应功能,图14所示的终端设备1400包括发送单元1410和接收单元1420。
发送单元1410,用于向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示所述第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;
在所述第一资源内的预留资源存在冲突的情况下,接收单元1420,用于接收所述第一终端设备发送的第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一资源、存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系确定的,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的资源冲突指示的序列,和/或,发送或不发送HARQ反馈。
在一种可能的实现方式中,所述第一PSFCH承载第一HARQ反馈时,承载所述资源冲突指示的序列与承载所述第一HARQ反馈的序列相同。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式为以第二序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈,其中,所述第二序列与所述第一序列不同。
在一种可能的实现方式中,若所述多个预留资源中存在冲突的预留资源不同,则所述资源冲突指示的序列不同。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源包含所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第三序列发送所述第一资源冲突指示。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源包含所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且发送所述第一HARQ反馈。
在一种可能的实现方式中,所述第一HARQ反馈为仅基于NACK的HARQ反馈,所述第一HARQ反馈为ACK。
在一种可能的实现方式中,所述第一资源内的预留资源为所述目标数据的重传资源。
图15是本申请实施例的终端设备的示意图,图15所示的终端设备可以实现上文中第二终端设备的相应功能,图15所示的终端设备1500包括发送单元1510和接收单元1520。
发送单元1510,用于向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示所述第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;
在所述第一资源内的预留资源存在冲突的情况下,接收单元1520,用于接收第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一资源、存在冲突的预留资源与PSFCH的发送方式之间的关联关系确定的,其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH 的发送方式包括用于指示存在冲突的预留资源的冲突指示占用的频域单元,和/或,发送或不发送HARQ反馈。
在一种可能的实现方式中,若所述多个预留资源中存在冲突的预留资源不同则所述资源冲突指示占用的频域单元不同。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第一频域单元。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第二频域单元。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一资源包括第一预留资源和第二预留资源,则所述第一PSFCH的发送方式包括占用第一频域单元与第二频域单元发送所述第一资源冲突指示。
在一种可能的实现方式中,所述第一PSFCH的发送方式还包括不发送针对所述目标数据的第一HARQ反馈。
在一种可能的实现方式中,所述第一资源内的预留资源为所述目标数据的重传资源。
图16是本申请实施例的终端设备的示意图,图16所示的终端设备可以实现上文中第二终端设备的相应功能,图16所示的终端设备1600还可以包括发送单元1610和接收单元1620。
发送单元1610,用于向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中包括第一预留资源;
在所述第一预留资源存在冲突的情况下,接收单元1620,用于接收所述第一终端设备发送的第一第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一预留资源为所述目标数据的重传资源或初传资源确定的,其中,所述第一PSFCH的发送方式包括在所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一预留资源存在冲突。
在一种可能的实现方式中,若所述第一终端设备成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
在一种可能的实现方式中,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为重传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示以及所述第一HARQ反馈。
图17是本申请实施例的终端设备的示意图,图17所示的终端设备可以实现上文中第二终端设备的相应功能,图17所示的终端设备1700包括发送单元1710和接收单元1720。
发送单元1710,用于在第一时域单元内向第一终端设备发送资源指示信息,所述资源指示信息用于指示所述第二终端设备在第二时域单元内的目标预留资源;
接收单元1720,用于在第三时域单元上接收所述第二终端设备发送的资源冲突指示,所述资源冲突指示用于指示所述目标预留资源中存在冲突的预留资源,其中,所述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:所述第一时域单元在时域上的位置;所述第二时域单元在时域上的位置;所述第一终端设备解码所述指示信息所需的时间;所述第一终端设备准备所述资源冲突指示所需的时间;所述第二终端设备解码所述资源冲突指示所需的时间;以及所述第二终端设备准备在所述预留资源上传输数据所需的时间。
在一种可能的实现方式中,所述第一时域单元与所述第三时域单元之间的时间间隔是基于所述第一终端设备解码所述指示信息所需的时间以及所述第一终端设备准备所述资源冲突指示所需的时间确定的。
在一种可能的实现方式中,所述第三时域单元与所述第二时域单元之间的时间间隔是基于所述第二终端设备解码所述资源冲突指示所需的时间以及所述第二终端设备准备在所述预留资源上传输数据所需的时间确定的。
在一种可能的实现方式中,所述资源冲突指示承载于物理侧行反馈信道PSFCH。
在一种可能的实现方式中,所述第二终端设备解码所述第一PSFCH所需的时间基于所述第二终端设备解码侧行控制信息SCI所需的时间确定。
在一种可能的实现方式中,所述存在冲突的预留资源为多个预留资源,所述多个预留资源满足以下条件中的任一种:所述多个预留资源中的至少部分预留资源为初传资源;所述多个预留资源中的至少部分预留资源为重传资源;所述多个预留资源属于所述资源指示信息指示所述第二终端设备预留的资源 集,所述多个预留资源中每个预留资源与所述资源指示信息占用的时频资源之间的距离小于第一距离,所述第一距离为所述资源集中除所述多个预留资源之外的其他预留资源与所述资源指示信息占用的时频资源之间的距离。
图18是本申请实施例的通信装置的示意性结构图。图18中的虚线表示该单元或模块为可选的。该装置1800可用于实现上述方法实施例中描述的方法。装置1800可以是芯片、终端设备。
装置1800可以包括一个或多个处理器1810。该处理器1810可支持装置1800实现前文方法实施例所描述的方法。该处理器1810可以是通用处理器或者专用处理器。例如,该处理器可以为中央处理单元(central processing unit,CPU)。或者,该处理器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。
装置1800还可以包括一个或多个存储器1820。存储器1820上存储有程序,该程序可以被处理器1810执行,使得处理器1810执行前文方法实施例所描述的方法。存储器1820可以独立于处理器1810也可以集成在处理器1810中。
装置1800还可以包括收发器1830。处理器1810可以通过收发器1830与其他设备或芯片进行通信。例如,处理器1810可以通过收发器1830与其他设备或芯片进行数据收发。
本申请实施例还提供一种计算机可读存储介质,用于存储程序。该计算机可读存储介质可应用于本申请实施例提供的终端或网络设备中,并且该程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
本申请实施例还提供一种计算机程序产品。该计算机程序产品包括程序。该计算机程序产品可应用于本申请实施例提供的终端或网络设备中,并且该程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
本申请实施例还提供一种计算机程序。该计算机程序可应用于本申请实施例提供的终端或网络设备中,并且该计算机程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
应理解,本申请中术语“系统”和“网络”可以被可互换使用。另外,本申请使用的术语仅用于对本申请的具体实施例进行解释,而非旨在限定本申请。本申请的说明书和权利要求书及所述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象,而不是用于描述特定顺序。此外,术语“包括”和“具有”以及它们任何变形,意图在于覆盖不排他的包含。
在本申请的实施例中,提到的“指示”可以是直接指示,也可以是间接指示,还可以是表示具有关联关系。举例说明,A指示B,可以表示A直接指示B,例如B可以通过A获取;也可以表示A间接指示B,例如A指示C,B可以通过C获取;还可以表示A和B之间具有关联关系。
在本申请实施例中,“与A相应的B”表示B与A相关联,根据A可以确定B。但还应理解,根据A确定B并不意味着仅仅根据A确定B,还可以根据A和/或其它信息确定B。
在本申请实施例中,术语“对应”可表示两者之间具有直接对应或间接对应的关系,也可以表示两者之间具有关联关系,也可以是指示与被指示、配置与被配置等关系。
本申请实施例中,“预定义”或“预配置”可以通过在设备(例如,包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现,本申请对于其具体的实现方式不做限定。比如预定义可以是指协议中定义的。
本申请实施例中,所述“协议”可以指通信领域的标准协议,例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议,本申请对此不做限定。
本申请实施例中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
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。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的 需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line,DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够读取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质,(例如,软盘、硬盘、磁带)、光介质(例如,数字通用光盘(digital video disc,DVD))或者半导体介质(例如,固态硬盘(solid state disk,SSD))等。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。

Claims (111)

  1. 一种通信方法,其特征在于,包括:
    第一终端设备接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;
    在所述第一资源内的预留资源存在冲突的情况下,所述第一终端设备基于存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系,确定与所述第一资源关联的第一PSFCH的发送方式,
    其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一混合自动重传请求HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的资源冲突指示的序列,和/或,发送或不发送HARQ反馈。
  2. 如权利要求1所述的方法,其特征在于,所述第一PSFCH承载第一HARQ反馈时,承载所述资源冲突指示的序列与承载所述第一HARQ反馈的序列相同。
  3. 如权利要求1或2所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈。
  4. 如权利要求3所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式为以第二序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈,其中,所述第二序列与所述第一序列不同。
  5. 如权利要求1-4中任一项所述的方法,其特征在于,若所述多个预留资源中存在冲突的预留资源不同,则所述资源冲突指示的序列不同。
  6. 如权利要求5所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源包含所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第三序列发送所述第一资源冲突指示。
  7. 如权利要求3或4所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源包含所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且发送所述第一HARQ反馈。
  8. 如权利要求7所述的方法,其特征在于,所述第一HARQ反馈为仅基于NACK的HARQ反馈,所述第一HARQ反馈为ACK。
  9. 如权利要求1-8中任一项所述的方法,其特征在于,所述第一资源内的预留资源为所述目标数据的重传资源。
  10. 一种通信方法,其特征在于,包括:
    第一终端设备接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;
    在所述第一资源内的预留资源存在冲突的情况下,所述第一终端设备基于存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系,确定与所述第一资源关联的第一PSFCH的发送方式,
    其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的冲突指示占用的频域单元,和/或,发送或不发送HARQ反馈。
  11. 如权利要求10所述的方法,其特征在于,若所述多个预留资源中存在冲突的预留资源不同则所述资源冲突指示占用的频域单元不同。
  12. 如权利要求11所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第一频域单元。
  13. 如权利要求11所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第二频域单元。
  14. 如权利要求11所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源包含第一预留资源和第二预留资源,则所述第一PSFCH的发送方式包括占用第一频域单元与第二频域单元发送所述第一资源冲突指示。
  15. 如权利要求12-14中任一项所述的方法,其特征在于,所述第一PSFCH的发送方式还包括不发送针对所述目标数据的第一HARQ反馈。
  16. 如权利要求10-15中任一项所述的方法,其特征在于,所述第一资源内的预留资源为所述目标数据的重传资源。
  17. 一种通信方法,其特征在于,包括:
    第一终端设备接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中包括第一预留资源;
    在所述第一预留资源存在冲突的情况下,所述第一终端设备基于所述第一预留资源为所述目标数据的重传资源或初传资源,确定第一物理侧行反馈信道PSFCH的发送方式,
    其中,所述第一PSFCH的发送方式包括在所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一预留资源存在冲突。
  18. 如权利要求17所述的方法,其特征在于,若所述第一终端设备成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
  19. 如权利要求17所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
  20. 如权利要求17所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为重传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示以及所述第一HARQ反馈。
  21. 一种通信方法,其特征在于,包括:
    第一终端设备在第一时域单元内接收第二终端设备发送的资源指示信息,所述资源指示信息用于指示所述第二终端设备在第二时域单元内的目标预留资源;
    所述第一终端设备在第三时域单元上向所述第二终端设备发送资源冲突指示,所述资源冲突指示用于指示所述目标预留资源中存在冲突的预留资源,
    其中,所述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:
    所述第一时域单元在时域上的位置;
    所述第二时域单元在时域上的位置;
    所述第一终端设备解码所述指示信息所需的时间;
    所述第一终端设备准备所述资源冲突指示所需的时间;
    所述第二终端设备解码所述资源冲突指示所需的时间;以及
    所述第二终端设备准备在所述预留资源上传输数据所需的时间。
  22. 如权利要求21所述的方法,其特征在于,所述第一时域单元与所述第三时域单元之间的时间间隔是基于所述第一终端设备解码所述指示信息所需的时间以及所述第一终端设备准备所述资源冲突指示所需的时间确定的。
  23. 如权利要求21或22所述的方法,其特征在于,所述第三时域单元与所述第二时域单元之间的时间间隔是基于所述第二终端设备解码所述资源冲突指示所需的时间以及所述第二终端设备准备在所述预留资源上传输数据所需的时间确定的。
  24. 如权利要求21-23中任一项所述的方法,其特征在于,所述资源冲突指示承载于物理侧行反馈信道PSFCH。
  25. 如权利要求24所述的方法,其特征在于,所述第二终端设备解码所述第一PSFCH所需的时间基于所述第二终端设备解码侧行控制信息SCI所需的时间确定。
  26. 如权利要求21-25中任一项所述的方法,其特征在于,所述存在冲突的预留资源为多个预留资源,所述多个预留资源满足以下条件中的任一种:
    所述多个预留资源中的至少部分预留资源为初传资源;
    所述多个预留资源中的至少部分预留资源为重传资源;
    所述多个预留资源属于所述资源指示信息指示所述第二终端设备预留的资源集,所述多个预留资源中每个预留资源与所述资源指示信息占用的时频资源之间的距离小于第一距离,所述第一距离为所述资源集中除所述多个预留资源之外的其他预留资源与所述资源指示信息占用的时频资源之间的距离。
  27. 一种通信方法,其特征在于,包括:
    第二终端设备向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示所述第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;
    在所述第一资源内的预留资源存在冲突的情况下,第二终端设备接收所述第一终端设备发送的第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一资源、存在冲突的预留资源 与物理侧行反馈信道PSFCH的发送方式之间的关联关系确定的,
    其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的资源冲突指示的序列,和/或,发送或不发送HARQ反馈。
  28. 如权利要求27所述的方法,其特征在于,所述第一PSFCH承载第一HARQ反馈时,承载所述资源冲突指示的序列与承载所述第一HARQ反馈的序列相同。
  29. 如权利要求27或28所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈。
  30. 如权利要求29所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式为以第二序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈,其中,所述第二序列与所述第一序列不同。
  31. 如权利要求27-30中任一项所述的方法,其特征在于,若所述多个预留资源中存在冲突的预留资源不同,则所述资源冲突指示的序列不同。
  32. 如权利要求31所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第三序列发送所述第一资源冲突指示。
  33. 如权利要求29或30所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且发送所述第一HARQ反馈。
  34. 如权利要求33所述的方法,其特征在于,所述第一HARQ反馈为仅基于NACK的HARQ反馈,所述第一HARQ反馈为ACK。
  35. 如权利要求27-34中任一项所述的方法,其特征在于,所述第一资源内的预留资源为所述目标数据的重传资源。
  36. 一种通信方法,其特征在于,包括:
    第二终端设备向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示所述第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;
    在所述第一资源内的预留资源存在冲突的情况下,所述第二终端设备接收第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一资源、存在冲突的预留资源与PSFCH的发送方式之间的关联关系确定的,
    其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的冲突指示占用的频域单元,和/或,发送或不发送HARQ反馈。
  37. 如权利要求36所述的方法,其特征在于,若所述多个预留资源中存在冲突的预留资源不同则所述资源冲突指示占用的频域单元不同。
  38. 如权利要求37所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第一频域单元。
  39. 如权利要求37所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第二频域单元。
  40. 如权利要求37所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源和第二预留资源,则所述第一PSFCH的发送方式包括占用第一频域单元与第二频域单元发送所述第一资源冲突指示。
  41. 如权利要求39-40中任一项所述的方法,其特征在于,所述第一PSFCH的发送方式还包括不发送针对所述目标数据的第一HARQ反馈。
  42. 如权利要求36-41中任一项所述的方法,其特征在于,所述第一资源内的预留资源为所述目标数据的重传资源。
  43. 一种通信方法,其特征在于,包括:
    第二终端设备向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中包括第一预留资源;
    在所述第一预留资源存在冲突的情况下,所述第二终端设备接收所述第一终端设备发送的第一第 一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一预留资源为所述目标数据的重传资源或初传资源确定的,
    其中,所述第一PSFCH的发送方式包括在所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一预留资源存在冲突。
  44. 如权利要求43所述的方法,其特征在于,若所述第一终端设备成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
  45. 如权利要求43所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
  46. 如权利要求43所述的方法,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为重传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示以及所述第一HARQ反馈。
  47. 一种通信方法,其特征在于,包括:
    第二终端设备在第一时域单元内向第一终端设备发送资源指示信息,所述资源指示信息用于指示所述第二终端设备在第二时域单元内的目标预留资源;
    所述第二终端设备在第三时域单元上接收所述第二终端设备发送的资源冲突指示,所述资源冲突指示用于指示所述目标预留资源中存在冲突的预留资源,
    其中,所述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:
    所述第一时域单元在时域上的位置;
    所述第二时域单元在时域上的位置;
    所述第一终端设备解码所述指示信息所需的时间;
    所述第一终端设备准备所述资源冲突指示所需的时间;
    所述第二终端设备解码所述资源冲突指示所需的时间;以及
    所述第二终端设备准备在所述预留资源上传输数据所需的时间。
  48. 如权利要求47所述的方法,其特征在于,所述第一时域单元与所述第三时域单元之间的时间间隔是基于所述第一终端设备解码所述指示信息所需的时间以及所述第一终端设备准备所述资源冲突指示所需的时间确定的。
  49. 如权利要求47或48所述的方法,其特征在于,所述第三时域单元与所述第二时域单元之间的时间间隔是基于所述第二终端设备解码所述资源冲突指示所需的时间以及所述第二终端设备准备在所述预留资源上传输数据所需的时间确定的。
  50. 如权利要求47-49中任一项所述的方法,其特征在于,所述资源冲突指示承载于物理侧行反馈信道PSFCH。
  51. 如权利要求50所述的方法,其特征在于,所述第二终端设备解码所述第一PSFCH所需的时间基于所述第二终端设备解码侧行控制信息SCI所需的时间确定。
  52. 如权利要求47-51中任一项所述的方法,其特征在于,所述存在冲突的预留资源为多个预留资源,所述多个预留资源满足以下条件中的任一种:
    所述多个预留资源中的至少部分预留资源为初传资源;
    所述多个预留资源中的至少部分预留资源为重传资源;
    所述多个预留资源属于所述资源指示信息指示所述第二终端设备预留的资源集,所述多个预留资源中每个预留资源与所述资源指示信息占用的时频资源之间的距离小于第一距离,所述第一距离为所述资源集中除所述多个预留资源之外的其他预留资源与所述资源指示信息占用的时频资源之间的距离。
  53. 一种第一终端设备,其特征在于,包括:
    接收单元,用于接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;
    在所述第一资源内的预留资源存在冲突的情况下,处理单元,用于基于存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系,确定与所述第一资源关联的第一PSFCH的发送方式,
    其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的资源冲突指示的序列,和/或,发送或不发送HARQ反馈。
  54. 如权利要求53所述的第一终端设备,其特征在于,所述第一PSFCH承载第一HARQ反馈时, 承载所述资源冲突指示的序列与承载所述第一HARQ反馈的序列相同。
  55. 如权利要求53或54所述的第一终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈。
  56. 如权利要求55所述的第一终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式为以第二序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈,其中,所述第二序列与所述第一序列不同。
  57. 如权利要求53-56中任一项所述的第一终端设备,其特征在于,若所述多个预留资源中存在冲突的预留资源不同,则所述资源冲突指示的序列不同。
  58. 如权利要求57所述的第一终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第三序列发送所述第一资源冲突指示。
  59. 如权利要求55或56所述的第一终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且发送所述第一HARQ反馈。
  60. 如权利要求59所述的第一终端设备,其特征在于,所述第一HARQ反馈为仅基于NACK的HARQ反馈,所述第一HARQ反馈为ACK。
  61. 如权利要求53-60中任一项所述的第一终端设备,其特征在于,所述第一资源内的预留资源为所述目标数据的重传资源。
  62. 一种第一终端设备,其特征在于,包括:
    接收单元,用于接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;
    在所述第一资源内的预留资源存在冲突的情况下,处理单元,用于基于存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系,确定与所述第一资源关联的第一PSFCH的发送方式,
    其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的冲突指示占用的频域单元,和/或,发送或不发送HARQ反馈。
  63. 如权利要求62所述的第一终端设备,其特征在于,若所述多个预留资源中存在冲突的预留资源不同则所述资源冲突指示占用的频域单元不同。
  64. 如权利要求63所述的第一终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第一频域单元。
  65. 如权利要求63所述的第一终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第二频域单元。
  66. 如权利要求63所述的第一终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源和第二预留资源,则所述第一PSFCH的发送方式包括占用第一频域单元与第二频域单元发送所述第一资源冲突指示。
  67. 如权利要求64-66中任一项所述的第一终端设备,其特征在于,所述第一PSFCH的发送方式还包括不发送针对所述目标数据的第一HARQ反馈。
  68. 如权利要求62-67中任一项所述的第一终端设备,其特征在于,所述第一资源内的预留资源为所述目标数据的重传资源。
  69. 一种第一终端设备,其特征在于,包括:
    接收单元,用于接收资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中包括第一预留资源;
    在所述第一预留资源存在冲突的情况下,处理单元基于所述第一预留资源为所述目标数据的重传资源或初传资源,确定第一物理侧行反馈信道PSFCH的发送方式,
    其中,所述第一PSFCH的发送方式包括在所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一预留资源存在冲突。
  70. 如权利要求69所述的第一终端设备,其特征在于,若所述第一终端设备成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述 第一资源冲突指示。
  71. 如权利要求69所述的第一终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
  72. 如权利要求69所述的第一终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为重传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示以及所述第一HARQ反馈。
  73. 一种第一终端设备,其特征在于,包括:
    接收单元,用于在第一时域单元内接收第二终端设备发送的资源指示信息,所述资源指示信息用于指示所述第二终端设备在第二时域单元内的目标预留资源;
    发送单元,用于在第三时域单元上向所述第二终端设备发送资源冲突指示,所述资源冲突指示用于指示所述目标预留资源中存在冲突的预留资源,
    其中,所述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:
    所述第一时域单元在时域上的位置;
    所述第二时域单元在时域上的位置;
    所述第一终端设备解码所述指示信息所需的时间;
    所述第一终端设备准备所述资源冲突指示所需的时间;
    所述第二终端设备解码所述资源冲突指示所需的时间;以及
    所述第二终端设备准备在所述预留资源上传输数据所需的时间。
  74. 如权利要求73所述的第一终端设备,其特征在于,所述第一时域单元与所述第三时域单元之间的时间间隔是基于所述第一终端设备解码所述指示信息所需的时间以及所述第一终端设备准备所述资源冲突指示所需的时间确定的。
  75. 如权利要求73或74所述的第一终端设备,其特征在于,所述第三时域单元与所述第二时域单元之间的时间间隔是基于所述第二终端设备解码所述资源冲突指示所需的时间以及所述第二终端设备准备在所述预留资源上传输数据所需的时间确定的。
  76. 如权利要求73-75中任一项所述的第一终端设备,其特征在于,所述资源冲突指示承载于物理侧行反馈信道PSFCH。
  77. 如权利要求76所述的第一终端设备,其特征在于,所述第二终端设备解码所述第一PSFCH所需的时间基于所述第二终端设备解码侧行控制信息SCI所需的时间确定。
  78. 如权利要求73-77中任一项所述的第一终端设备,其特征在于,所述存在冲突的预留资源为多个预留资源,所述多个预留资源满足以下条件中的任一种:
    所述多个预留资源中的至少部分预留资源为初传资源;
    所述多个预留资源中的至少部分预留资源为重传资源;
    所述多个预留资源属于所述资源指示信息指示所述第二终端设备预留的资源集,所述多个预留资源中每个预留资源与所述资源指示信息占用的时频资源之间的距离小于第一距离,所述第一距离为所述资源集中除所述多个预留资源之外的其他预留资源与所述资源指示信息占用的时频资源之间的距离。
  79. 一种第二终端设备,其特征在于,包括:
    发送单元,用于向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示所述第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;
    在所述第一资源内的预留资源存在冲突的情况下,接收单元,用于接收所述第一终端设备发送的第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一资源、存在冲突的预留资源与物理侧行反馈信道PSFCH的发送方式之间的关联关系确定的,
    其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的资源冲突指示的序列,和/或,发送或不发送HARQ反馈。
  80. 如权利要求79所述的第二终端设备,其特征在于,所述第一PSFCH承载第一HARQ反馈时,承载所述资源冲突指示的序列与承载所述第一HARQ反馈的序列相同。
  81. 如权利要求79或80所述的第二终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且不发送所述第一HARQ反馈。
  82. 如权利要求81所述的第二终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式为以第二序列发送所述第一资 源冲突指示且不发送所述第一HARQ反馈,其中,所述第二序列与所述第一序列不同。
  83. 如权利要求79-82中任一项所述的第二终端设备,其特征在于,若所述多个预留资源中存在冲突的预留资源不同,则所述资源冲突指示的序列不同。
  84. 如权利要求83所述的第二终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第三序列发送所述第一资源冲突指示。
  85. 如权利要求81或82所述的第二终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为所述第一预留资源和所述第二预留资源,则所述第一PSFCH的发送方式为以第一序列发送所述第一资源冲突指示且发送所述第一HARQ反馈。
  86. 如权利要求85所述的第二终端设备,其特征在于,所述第一HARQ反馈为仅基于NACK的HARQ反馈,所述第一HARQ反馈为ACK。
  87. 如权利要求79-86中任一项所述的第二终端设备,其特征在于,所述第一资源内的预留资源为所述目标数据的重传资源。
  88. 一种第二终端设备,其特征在于,包括:
    发送单元,用于向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示所述第二终端设备预留的多个预留资源,所述多个预留资源中的部分或全部预留资源属于第一资源;
    在所述第一资源内的预留资源存在冲突的情况下,接收单元,用于接收第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一资源、存在冲突的预留资源与PSFCH的发送方式之间的关联关系确定的,
    其中,所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一资源内的预留资源存在冲突,所述PSFCH的发送方式包括用于指示存在冲突的预留资源的冲突指示占用的频域单元,和/或,发送或不发送HARQ反馈。
  89. 如权利要求88所述的第二终端设备,其特征在于,若所述多个预留资源中存在冲突的预留资源不同则所述资源冲突指示占用的频域单元不同。
  90. 如权利要求89所述的第二终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第一频域单元。
  91. 如权利要求89所述的第二终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第二预留资源,则所述第一PSFCH的发送方式包括所述第一资源冲突指示占用第二频域单元。
  92. 如权利要求89所述的第二终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一资源为第一预留资源和第二预留资源,则所述第一PSFCH的发送方式包括占用第一频域单元与第二频域单元发送所述第一资源冲突指示。
  93. 如权利要求90-92中任一项所述的第二终端设备,其特征在于,所述第一PSFCH的发送方式还包括不发送针对所述目标数据的第一HARQ反馈。
  94. 如权利要求88-93中任一项所述的第二终端设备,其特征在于,所述第一资源内的预留资源为所述目标数据的重传资源。
  95. 一种第二终端设备,其特征在于,包括:
    发送单元,用于向第一终端设备发送资源指示信息和目标数据,所述资源指示信息用于指示第二终端设备预留的多个预留资源,所述多个预留资源中包括第一预留资源;
    在所述第一预留资源存在冲突的情况下,接收单元,用于接收所述第一终端设备发送的第一第一物理侧行反馈信道PSFCH,所述第一PSFCH的发送方式是基于所述第一预留资源为所述目标数据的重传资源或初传资源确定的,
    其中,所述第一PSFCH的发送方式包括在所述第一PSFCH中承载第一资源冲突指示和/或针对所述目标数据的第一HARQ反馈,所述第一资源冲突指示用于指示所述第一预留资源存在冲突。
  96. 如权利要求95所述的第二终端设备,其特征在于,若所述第一终端设备成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
  97. 如权利要求95所述的第二终端设备,其特征在于,若所述第一终端设备未成功接收所述目标数据,且所述第一预留资源为初传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示。
  98. 如权利要求95所述的第二终端设备,其特征在于,若所述第一终端设备未成功接收所述目标 数据,且所述第一预留资源为重传资源,所述第一PSFCH的发送方式为在所述第一PSFCH中承载所述第一资源冲突指示以及所述第一HARQ反馈。
  99. 一种通信第二终端设备,其特征在于,包括:
    发送单元,用于在第一时域单元内向第一终端设备发送资源指示信息,所述资源指示信息用于指示所述第二终端设备在第二时域单元内的目标预留资源;
    接收单元,用于在第三时域单元上接收所述第二终端设备发送的资源冲突指示,所述资源冲突指示用于指示所述目标预留资源中存在冲突的预留资源,
    其中,所述第三时域单元在时域上的位置是基于以下信息中的一项或多项确定的:
    所述第一时域单元在时域上的位置;
    所述第二时域单元在时域上的位置;
    所述第一终端设备解码所述指示信息所需的时间;
    所述第一终端设备准备所述资源冲突指示所需的时间;
    所述第二终端设备解码所述资源冲突指示所需的时间;以及
    所述第二终端设备准备在所述预留资源上传输数据所需的时间。
  100. 如权利要求99所述的第二终端设备,其特征在于,所述第一时域单元与所述第三时域单元之间的时间间隔是基于所述第一终端设备解码所述指示信息所需的时间以及所述第一终端设备准备所述资源冲突指示所需的时间确定的。
  101. 如权利要求99或100所述的第二终端设备,其特征在于,所述第三时域单元与所述第二时域单元之间的时间间隔是基于所述第二终端设备解码所述资源冲突指示所需的时间以及所述第二终端设备准备在所述预留资源上传输数据所需的时间确定的。
  102. 如权利要求99-101中任一项所述的第二终端设备,其特征在于,所述资源冲突指示承载于物理侧行反馈信道PSFCH。
  103. 如权利要求102所述的第二终端设备,其特征在于,所述第二终端设备解码所述第一PSFCH所需的时间基于所述第二终端设备解码侧行控制信息SCI所需的时间确定。
  104. 如权利要求99-103中任一项所述的第二终端设备,其特征在于,所述存在冲突的预留资源为多个预留资源,所述多个预留资源满足以下条件中的任一种:
    所述多个预留资源中的至少部分预留资源为初传资源;
    所述多个预留资源中的至少部分预留资源为重传资源;
    所述多个预留资源属于所述资源指示信息指示所述第二终端设备预留的资源集,所述多个预留资源中每个预留资源与所述资源指示信息占用的时频资源之间的距离小于第一距离,所述第一距离为所述资源集中除所述多个预留资源之外的其他预留资源与所述资源指示信息占用的时频资源之间的距离。
  105. 一种终端设备,其特征在于,包括收发器、存储器和处理器,所述存储器用于存储程序,所述处理器用于调用所述存储器中的程序,以通过所述收发器执行如权利要求1-52中任一项所述的方法。
  106. 一种装置,其特征在于,包括处理器,用于从存储器中调用程序,以执行如权利要求1-52中任一项所述的方法。
  107. 一种芯片,其特征在于,包括处理器,用于从存储器调用程序,使得安装有所述芯片的设备执行如权利要求1-52中任一项所述的方法。
  108. 一种计算机可读存储介质,其特征在于,其上存储有程序,所述程序使得计算机执行如权利要求1-52中任一项所述的方法。
  109. 一种计算机程序产品,其特征在于,包括程序,所述程序使得计算机执行如权利要求1-52中任一项所述的方法。
  110. 一种计算机程序产品,其特征在于,包括程序,所述程序使得计算机执行如权利要求1-52中任一项所述的方法。
  111. 一种计算机程序,其特征在于,所述计算机程序使得计算机执行如权利要求1-52中任一项所述的方法。
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