WO2021164603A1 - Procédé et appareil d'indication de ressources pour informations de commande de liaison latérale, et dispositif terminal - Google Patents

Procédé et appareil d'indication de ressources pour informations de commande de liaison latérale, et dispositif terminal Download PDF

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Publication number
WO2021164603A1
WO2021164603A1 PCT/CN2021/075892 CN2021075892W WO2021164603A1 WO 2021164603 A1 WO2021164603 A1 WO 2021164603A1 CN 2021075892 W CN2021075892 W CN 2021075892W WO 2021164603 A1 WO2021164603 A1 WO 2021164603A1
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WIPO (PCT)
Prior art keywords
resource
transmission
harq feedback
resources
frequency domain
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PCT/CN2021/075892
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English (en)
Chinese (zh)
Inventor
邹蕾
曲鑫
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Spreadtrum Semiconductor Nanjing Co Ltd
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Spreadtrum Semiconductor Nanjing Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • 3GPP In the Release 16 phase of the 3rd Generation Partnership Project (3GPP), 3GPP emphasizes the standardization of mode2a, and the resource allocation mode of terminal equipment scheduling resources for other terminal equipment in mode2d needs further study.
  • the embodiments of the present application provide a method and device for indicating resources of secondary link control information, and terminal equipment. It is expected that the time-frequency domain position information of the scheduled resources will be indicated through the secondary link control information, which is beneficial to realize that the terminal equipment is other The resource allocation method of terminal equipment scheduling resources.
  • an embodiment of the present application provides a resource indication method for secondary link control information, including:
  • the first terminal device sends the first auxiliary link control information SCI to the second terminal device, where the first SCI is used to indicate the first number of transmission resources and the second number of first hybrid automatic repeat request HARQ feedback resources, so The first number of transmission resources are used for data and SCI transmission between the second terminal device and the third terminal device, and the second number of first HARQ feedback resources are used for the second terminal device to transmit data to the The first terminal device performs the first HARQ feedback, the first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to the second HARQ feedback result, and the second HARQ feedback result is the first HARQ feedback result.
  • the HARQ feedback result of the third terminal device with respect to the data transmission condition of the second terminal device on the first number of transmission resources.
  • an embodiment of the present application provides a resource indication method for secondary link control information, including:
  • the second terminal device receives the first SCI from the first terminal device, where the first SCI is used to indicate a first number of transmission resources and a second number of first HARQ feedback resources, and the first number of transmission resources is used for Data and SCI transmission are performed between the second terminal device and the third terminal device, and the second number of first HARQ feedback resources are used for the second terminal device to perform the first HARQ feedback to the first terminal device ,
  • the first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to the second HARQ feedback result, and the second HARQ feedback result is that the third terminal is directed to the second terminal device HARQ feedback results of data transmission conditions on the first number of transmission resources.
  • Receive first auxiliary link control information SCI from the first terminal device through the communication unit where the first SCI is used to indicate a first number of transmission resources and a second number of first hybrid automatic repeat request HARQ feedback resources ,
  • the first number of transmission resources are used for data and SCI transmission between the second terminal device and the third terminal device, and the second number of first HARQ feedback resources are used for the second terminal device to transmit data to
  • the first terminal device performs the first HARQ feedback
  • the first HARQ feedback result carried on the second number of the first HARQ feedback resources is determined according to the second HARQ feedback result
  • the second HARQ feedback result is The HARQ feedback result of the third terminal device with respect to the data transmission condition of the second terminal device on the first number of transmission resources.
  • an embodiment of the present application provides a terminal device.
  • the terminal device is a first terminal device and includes a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored In the memory and configured to be executed by the processor, the program includes instructions for executing the steps in any method in the first aspect of the embodiments of the present application.
  • an embodiment of the present application provides a terminal device.
  • the terminal device is a second terminal device and includes a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored In the memory and configured to be executed by the processor, the program includes instructions for executing the steps in any method in the second aspect of the embodiments of the present application.
  • an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the For example, part or all of the steps described in any method of the first aspect or the second aspect.
  • an embodiment of the present application provides a computer program, wherein the computer program is operable to cause a computer to execute part or all of the steps described in any method of the first aspect or the second aspect of the embodiment of the present application .
  • the computer program may be a software installation package.
  • the first terminal device issues a piece of auxiliary link control information
  • the second terminal device can learn the resources scheduled by the first terminal device by detecting and decoding the auxiliary link control information.
  • the second terminal device can use the resource to perform secondary link transmission and second HARQ feedback with the third terminal device, and perform first HARQ feedback with the first terminal device according to the second HARQ feedback result. Since the time-frequency domain position information of the scheduled resource is indicated by the secondary link control information, it is beneficial to realize a resource allocation method in which the terminal device schedules resources for other terminal devices.
  • FIG. 1A is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application.
  • FIG. 1C is a schematic diagram of a resource allocation method in mode 2d provided by an embodiment of the present application.
  • FIG. 1D is a schematic diagram of a physical secondary link feedback channel resource provided by an embodiment of the present application.
  • 1E is a schematic diagram of an implicit mapping relationship between transmission resources and physical auxiliary link feedback information resources provided by an embodiment of the present application
  • 2A is a schematic flowchart of a method for resource indication of secondary link control information provided by an embodiment of the present application
  • 2B is a schematic diagram of a resource indication field in secondary link control information provided by an embodiment of the present application.
  • 2C is a schematic diagram of another resource indication field in secondary link control information provided by an embodiment of the present application.
  • 2D is a schematic diagram of an independent physical secondary link control channel and a data transmission single subchannel provided by an embodiment of the present application;
  • FIG. 3 is a block diagram of functional units of a resource indicating device for secondary link control information provided by an embodiment of the present application
  • FIG. 4 is a block diagram of functional units of another device for indicating resources of auxiliary link control information provided by an embodiment of the present application
  • FIG. 5 is a schematic structural diagram of a first terminal device provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a second terminal device provided by an embodiment of the present application.
  • the example communication system 100 includes a first terminal device 110A, a second terminal device 110B, and a third terminal device 110C.
  • An auxiliary link is established between the first terminal device 110A and the second terminal device 110B, and an auxiliary link is established between the second terminal device 110B and the third terminal device 110C.
  • the first terminal device 110A can schedule resources to the second terminal device 110B, and the second terminal device 110B can perform auxiliary link transmission and hybrid automatic repeat request with the third terminal device 110C on the scheduled resources.
  • the terminal device 110 may include a first terminal device 110A, a second terminal device 110B, and a third terminal device 110C.
  • the terminal device 110 in the embodiments of the present application may refer to vehicle-mounted equipment, vehicle-mounted terminal, vehicle equipment, or automobile equipment, etc., as well as user equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station, etc. Remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the terminal device 110 can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), and a wireless Handheld devices, computing devices, or other processing devices connected to wireless modems, relay devices, wearable devices, terminal devices in 5G NR systems, or future evolution of public land mobile communication networks (Public Land Mobile Network, PLMN) Terminal equipment in.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • PLMN Public Land Mobile Network
  • the terminal device 110 includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (Memory Management Unit, MMU), and memory (also referred to as main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution body of the method provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided in accordance with the embodiments of the application.
  • the execution subject of the method provided in the embodiment of the present application may be the terminal device 110, or a functional module in the terminal device 110 that can call and execute the program.
  • FIG. 1B is a schematic diagram of a resource pool provided by an embodiment of the present application.
  • the granularity of the time domain is the time slot (slot)
  • the granularity of the frequency domain is the data transmission subchannel (subchannel)
  • each data transmission subchannel contains m resource blocks (RB)
  • RB resource blocks
  • m is a high-level configuration of.
  • Each transmission resource will simultaneously transmit the Physical Sidelink Control Channel (PSCCH) and the Physical Sidelink Share Channel (PSSCH).
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Share Channel
  • the SCI may include the time-frequency domain position information of the current transmission resource and the time-frequency domain position information of the later reserved transmission resource, and may also include some parameters in the decoding PSSCH.
  • the frequency domain start position of the PSCCH is the same as the frequency domain start position of the PSSCH. When the PSCCH is detected, the frequency domain start position of the current PSSCH can be obtained.
  • one terminal device 110 may schedule transmission resources for another or more terminal devices 110.
  • the terminal device 110 that schedules resources is the first terminal device 110A
  • the other terminal device or devices 110 that are scheduled are the second terminal device 110B.
  • the first terminal device 110A schedules transmission resources for the second terminal device 110B.
  • the first terminal device 110A obtains a group of resources, and then, the first terminal device 110A schedules resources within the group of resources to the second terminal device 110B for secondary link transmission.
  • the acquisition of this group of resources by the first terminal device 110A specifically considers the following two scenarios:
  • the network device 120 allocates a group of resources to the first terminal device 110A in the resource pool by means of dynamic scheduling or configured grant (Configured Grant), and then the first terminal device 110A schedules resources to the second terminal device 110A in this group of resources.
  • the terminal device 110B performs auxiliary link transmission.
  • the network device 120 in the embodiment of the present application may be a device for communicating with the terminal device 110.
  • the network equipment 120 may include an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, a Next Generation Node B (Next Generation Node B, gNB or gNodeB) in a 5G NR system, and Next Generation Evolved Node B (Next Generation Evolved Node B, ng-eNB or ng-eNodeB), Cloud Radio Access Network (Cloud Radio Access Network, CRAN) scenarios for wireless controllers.
  • eNB or eNodeB evolved Node B in a Long Term Evolution (LTE) system
  • Next Generation Node B Next Generation Node B, gNB or gNodeB
  • Next Generation Evolved Node B Next Generation Evolved Node B, ng-eNB or ng-eNodeB
  • Cloud Radio Access Network Cloud Radio Access Network, CRAN
  • the network device 120 may also include a relay device, an access point, a vehicle-mounted device, a wearable device, one or a group of (including multiple antenna panels) antenna panels of the base station in the 5G NR system, and the antenna panels that constitute the gNB or transmission point.
  • Network nodes such as Baseband Unit (BBU) or Distributed Unit (DU). The embodiments of the application are not limited.
  • the first terminal device 110A selects a group of resources in the resource pool based on the perception window and the resource selection window in the perception resource allocation method (mode 2a), and then the first terminal device schedules resources within this group of resources to the second terminal device. Secondary link transmission.
  • the manner in which the first terminal device 110A schedules resources for the second terminal device 110B may be dynamic scheduling of transmission resources, or the transmission resources may be configured through configuration authorization.
  • the way for the second terminal device 110B to obtain transmission resources may also be: after the first terminal device 110A obtains a set of resources, the second terminal device 110B is notified of the set of resources, and then the second terminal device 110B is based on the perceived resources
  • the perception window and resource selection window in the allocation method (mode 2a) select transmission resources in this group of resources.
  • PFCH Physical Sidelink Feedback Channel
  • PSFCH resources For each resource pool, PSFCH resources will be (pre-)configured or not (pre-)configured.
  • the period of the PSFCH resource will be configured, and the period N can be 1, 2 or 4 time slots.
  • the resource pool is (pre-configured) with PSFCH resources with a period N of 2, that is, there will be one PSFCH resource in every two time slots.
  • the PSFCH resource used to transmit HARQ feedback information occupies one symbol in one slot.
  • the PSFCH symbol used to transmit HARQ feedback information may be the penultimate symbol of the secondary link symbol.
  • the PSFCH resource used to transmit HARQ feedback information can be indicated by a (pre-)configured bitmap.
  • the bitmap is used to indicate which RBs in the resource pool bandwidth on the PSFCH symbol are PSFCH resources, and HARQ Feedback information can be transmitted on these RBs.
  • the second terminal device 110B When a resource pool (pre-)configured with resources that can be HARQ feedback, the second terminal device 110B will indicate in the SCI carried by each transmission resource whether the third terminal device 110C needs to perform HARQ feedback during the current transmission. If the SCI in the current transmission indicates that the third terminal device 110C needs to perform HARQ feedback, the third terminal device 110C needs to perform HARQ feedback to the second terminal device 110B on the PSFCH resource corresponding to the current transmission after receiving the transmission.
  • the PSFCH resource corresponding to the current transmission may be the implicit mapping relationship between the transmission resource and the PSFCH resource described below.
  • the SCI carried by each transmission resource does not indicate the PSFCH resource corresponding to the current transmission, but is implicitly indicated by the one-to-one correspondence between the current transmission and the PSFCH resource. That is, through the implicit mapping relationship between the transmission resource and the PSFCH resource, the third terminal device 110C can determine the PSFCH resource corresponding to the current transmission, and perform HARQ feedback on the corresponding PSFCH resource.
  • the HARQ feedback rule in the secondary link is related to the transmission mode on the secondary link.
  • the transmission modes on the secondary link include the following three: unicast, groupcast, and broadcast.
  • unicast refers to a terminal device that only transmits data to another terminal device.
  • Multicast refers to a terminal device that transmits data to other terminal devices in the same group as the terminal device. In other words, only the terminal devices in the group can receive multicast data, and the higher layer will indicate which terminal devices belong to a group.
  • Broadcasting refers to a terminal device transmitting data to all other terminal devices, and all terminal devices can receive broadcast data.
  • the new air interface secondary link (NR SL) can support HARQ feedback in unicast and multicast modes,
  • the third terminal device 110C performs HARQ feedback to the second terminal device 110B on the PSFCH resource. If the third terminal device 110C successfully receives the data from the second terminal device 110B, then the HARQ positive (ACK) message is fed back on the PSFCH resource; if the third terminal device 110C fails to receive the data, then the HARQ negative (NACK) message is fed back on the PSFCH resource. ) Message; if the third terminal device 110C does not detect the PSCCH, that is, the third terminal device does not know that there is a current transmission, then the third terminal device 110C does not perform HARQ feedback.
  • ACK HARQ positive
  • NACK HARQ negative
  • the second terminal device 110B will perform HARQ feedback detection on the PSFCH resource corresponding to the current transmission.
  • the second terminal device 110B retransmits to the third terminal device 110C data.
  • the multicast method there are two types of HARQ feedback methods, namely the first type of multicast HARQ feedback method (groupcast option1) and the second type of multicast HARQ feedback method (graoupcast option2), and the SCI carried by the transmission resource will indicate which HARQ feedback method.
  • the first type of multicast HARQ feedback mode supports the third terminal device 110C to only feed back HARQ NACK information, and all third terminal devices 110C in the group perform HARQ NACK feedback on the same PSFCH resource.
  • the third terminal device 110C feeds back HARQ NACK information on the PSFCH resource corresponding to the current transmission; if the third terminal device 110C successfully receives or fails to detect the PSCCH , Then HARQ feedback is not performed.
  • the third terminal device 110C detects the HARQ NACK information of the third terminal device 110 on the corresponding PSFCH resource, the third terminal device 110C performs retransmission.
  • the second type of multicast HARQ feedback mode supports the third terminal device 110C to perform HARQ ACK/NACK feedback, and each third terminal device 110C in the group has a corresponding PSFCH resource to feed back the HARQ ACK/NACK message.
  • M third terminal devices 110C in the group there will be M PSFCH resources. If the third terminal device 110C receives successfully, then the HARQ ACK information is fed back on the corresponding PSFCH resource; if the third terminal device 110C does not receive successfully, then the HARQ NACK information is fed back on the corresponding PSFCH resource; if the third terminal device 110C does not PSCCH is detected, then the third terminal device 110C does not perform HARQ feedback on the PSFCH resource.
  • the second terminal device 110B detects HARQ ACK information on all M PSFCH resources, the third terminal device 110C does not perform retransmission, otherwise it performs retransmission.
  • the higher layer configures a value of k, which is used to indicate the time slot in which the PSFCH resource corresponding to the transmission resource in time slot n is located. If there is a PSFCH resource in slot n+k, then the third terminal device 110C will perform HARQ feedback on the PSFCH resource in slot n+k; if there is no PSFCH resource in slot n+k, then the third terminal device 110C will HARQ feedback is performed on the PSFCH resource in the first time slot with the PSFCH resource after the time slot n+k.
  • k which is used to indicate the time slot in which the PSFCH resource corresponding to the transmission resource in time slot n is located.
  • a PSFCH resource with a period of 2 is (pre-)configured in a resource pool, that is, a PSFCH resource in time slot n+1 and a PSFCH resource in time slot n+3, and the specific is determined according to the bitmap Multiple RBs corresponding to each PSFCH resource.
  • the third terminal device 110C is on the PSFCH resource in time slot n+3 that has PSFCH resources in the first time slot n+2 after time slot n+2. Give feedback.
  • the third terminal device 110C performs HARQ feedback on the PSFCH resources in time slot n+3.
  • the time slot in which the current transmission resource is located can determine which time slot the corresponding PSFCH resource is in.
  • the following rules apply: the upper layer configures a Z value, which is used to indicate each PSFCH resource.
  • the data transmission sub-channel corresponds to a PSFCH resource with Z RBs.
  • the first data transmission subchannel in the first time slot in the P time slots corresponds to the PSFCH symbol
  • the first data transmission subchannel in the second slot in the P slots corresponds to the second PSFCH resource with Z RBs in the PSFCH symbol
  • the second data transmission subchannel in the first time slot of the P time slots corresponds to the P+1th PSFCH resource with Z RBs in the PSFCH symbol, ....
  • the first PSFCH symbol corresponding to the s-th slot in the slot n has a PSFCH resource of 2 RBs.
  • one RB may contain multiple resources, which are distinguished by cycle shift. For example, if one RB contains Y cycle shift resources, then Z RBs contain Z ⁇ Y PSFCH resources.
  • FIG. 2A is a schematic flowchart of a method for indicating resources of secondary link control information according to an embodiment of the present application, and the method includes:
  • the first terminal device 110A sends the first auxiliary link control information SCI to the second terminal device 110B.
  • the first SCI is used to indicate the first number of transmission resources and the second number of first HARQ feedback resources. It is understandable that the first SCI is specifically used to indicate the time-frequency domain location information of the first number of transmission resources and the time-frequency domain location information of the second number of first HARQ feedback resources.
  • the time-frequency domain position information of the first number of transmission resources may include the slot position of each transmission resource in the first number of transmission resources, the frequency domain starting position of each transmission resource, and the frequency domain of each transmission resource.
  • the bearer channel of the first SCI is the standalone PSCCH or PSCCH+PSSCH single subchannel
  • the frequency domain size of the standalone PSCCH and PSCCH+PSSCH single subchannel is fixed, there is no need to indicate each first SCI in the first SCI.
  • the frequency domain size of the HARQ feedback resource can be obtained through the frequency domain starting position of each first HARQ feedback resource indicated by the first SCI, plus its fixed frequency domain size.
  • the first number of transmission resources are used for data and SCI transmission between the second terminal device 110B and the third terminal device 110C
  • the second number of first HARQ feedback resources are used for the second terminal device 110B to the first terminal.
  • the device 110A performs the first HARQ feedback.
  • the first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to the second HARQ feedback result
  • the second HARQ feedback result is that the third terminal device 110C is in the first number for the second terminal device 110B.
  • the first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to the second HARQ feedback result.
  • the second terminal device 110B is in the second HARQ corresponding to the current transmission resource
  • the HARQ feedback of the third terminal device 110C is detected on the feedback resource, and it is determined that it is an HARQ ACK or NACK message, that is, the second HARQ feedback result, and then according to the second HARQ feedback result, the second terminal device 110B is the second terminal device 110B after the current transmission resource.
  • the determined HARQ feedback result, that is, the first HARQ feedback result is fed back to the first terminal device 110A on a first HARQ feedback resource.
  • the judgment rule can be as follows: For the unicast HARQ feedback mode, when the second terminal device 110B detects the HARQ ACK message on the second HARQ feedback resource, the second terminal device 110B judges the HARQ ACK and feeds it back to the first terminal device 110A HARQ ACK information, otherwise it is judged as HARQ NACK and the HARQ NACK information is fed back to the first terminal device 110A; for the first type of multicast HARQ feedback mode, when the second terminal device 110B detects HARQ NACK information on the second HARQ feedback resource , The second terminal device 110B feeds back HARQ NACK information to the first terminal device 110A, otherwise it feeds back HARQ ACK information; for the second type of multicast HARQ feedback mode, when the second terminal device 110B has all the corresponding second HARQ feedback resources When the HARQ ACK information is detected, the second terminal device 110B feeds back the HARQ ACK information to the first terminal device 110A, otherwise, it feeds back the HAR
  • the second HARQ feedback resource may be a physical sidelink feedback channel (PSFCH) resource. Therefore, the second HARQ feedback resource corresponding to the current transmission resource can be determined by the content in the above-mentioned "implicit mapping relationship between transmission resource and PSFCH resource", that is, a value of k is configured by high-level signaling.
  • PSFCH physical sidelink feedback channel
  • the number of bits of the HARQ ACK/NACK information sent by the second terminal device 110B to the first terminal device 110A is 1.
  • the third terminal device 110C judges that the current The data transmission status of the transmission resource, and the second HARQ feedback result is fed back on the second HARQ feedback resource corresponding to the current transmission resource.
  • the judgment rule can be as follows: For unicast and second-type multicast HARQ feedback methods, if the third terminal device 110C successfully receives data from the second terminal device 110B on the current transmission resource, the second terminal device 110B corresponding to the current transmission resource HARQ ACK information is fed back on the HARQ resource; if the third terminal device 110C does not successfully receive, the HARQ NACK information is fed back; if the third terminal device 110C does not detect the PSCCH on the current transmission resource, the HARQ feedback is not performed.
  • the third terminal device 110C fails to receive successfully, then the HARQ NACK information is fed back; if the third terminal device 110C successfully receives or does not detect the PSCCH, the HARQ feedback is not performed.
  • time interval between the first transmission resource in the first number of transmission resources and the last transmission resource in the first number of transmission resources does not exceed 32 time slots.
  • the first number of transmission resources includes the second number of transmission resources, where the second number of transmission resources is configured with the second number of first HARQ after each transmission resource in a one-to-one correspondence relationship.
  • One of the first HARQ feedback resources in the feedback resources It can be understood that there is a second number of transmission resources in the first number of transmission resources, and after each transmission resource of the second number of transmission resources, a first HARQ feedback resource is configured. For example, if the first SCI schedules three transmission resources, and each of the first HARQ feedback resources is scheduled after the first transmission resource and the third transmission resource. At this time, the second number of transmission resources are the first transmission resource and the third transmission resource. If the first SCI schedules three transmission resources, and only one HARQ feedback resource is scheduled after the last transmission resource. At this time, the second number of transmission resources is the third transmission resource.
  • the current transmission resource carries the second SCI
  • the second SCI uses Instructing the third terminal device 110C to perform the second HARQ feedback to the second terminal device 110B on the second HARQ feedback resource corresponding to the current transmission resource. It is understandable that if there is a second HARQ feedback resource corresponding to the current transmission between the current transmission and the next transmission, that is, the second HARQ feedback corresponding to the current transmission is before the next transmission resource, then the SCI of the current transmission The third terminal device 110C will be instructed to perform HARQ feedback on the current transmission.
  • the second HARQ feedback resource corresponding to the current transmission resource is after the next transmission resource of the current transmission resource, after the transmission on the current transmission resource is completed, the next transmission resource of the current transmission resource is directly used.
  • the next transmission resource of the current transmission resource is directly used. To transfer. It is understandable that if the time domain locations of the two transmission resources (the previous and the next) are very close, the second HARQ feedback resource corresponding to the previous transmission is after the next transmission, then the previous transmission will be directly followed. Perform the next transmission without HARQ feedback on the previous transmission to determine whether the subsequent transmission is needed.
  • one SCI issued by the first terminal device 110A can schedule one or more transmission resources for the same transport block (Transport Block, TB) for the second terminal device 110B, and one or more first HARQ feedback resources for HARQ feedback, that is, the first number and the second number are integers greater than or equal to 1, so for different transmission resources and the number of first HARQ feedback resources, the first SCI needs corresponding time-frequency domain position information indicating the transmission resources and Time-frequency domain location information of the first HARQ feedback resource.
  • Transport Block, TB Transport Block
  • first HARQ feedback resources for HARQ feedback that is, the first number and the second number are integers greater than or equal to 1, so for different transmission resources and the number of first HARQ feedback resources, the first SCI needs corresponding time-frequency domain position information indicating the transmission resources and Time-frequency domain location information of the first HARQ feedback resource.
  • the first SCI may include: a first time interval indicator field (Time gap1), a first frequency domain index indicator field (Frequency index1), and a first time domain resource indicator field (Time gap1). indication field), a first frequency domain resource indication field (Frequency indication field), a second time interval indication field (Time gap2), and a second frequency domain index indication field (Frequency index2).
  • the first SCI schedules multiple transmission resources and one HARQ feedback resource, and after the last transmission resource of the multiple transmission resources, a first HARQ feedback resource is configured, and the second number of transmission resources is more The last transmission resource of two transmission resources.
  • the resource indication field in the first SCI is used to indicate the time-frequency domain location information of these resources.
  • the first time interval indicator field is used to indicate the time interval between the first SCI and the first transmission resource in the first number of transmission resources;
  • the first frequency domain index indicator field is used to indicate the first number of transmission resources The start position of the first transmission resource in the frequency domain, that is, the data transmission subchannel index;
  • the first time domain resource indicator field is used to indicate the first transmission resource in the first number of transmission resources.
  • the first frequency domain resource indication field is used to indicate the frequency domain starting position and the first number of transmissions of each transmission resource after the first transmission resource in the first number of transmission resources The frequency domain size of all transmission resources in the resource.
  • the frequency domain size is used to indicate the number of data transmission sub-channels occupied by the transmission resource, and the frequency domain size of all transmission resources is equal;
  • the second time interval indicator field is used to indicate the correspondence of a single transmission resource The time interval between the second HARQ feedback resource and the single first HARQ feedback resource;
  • the second frequency domain index indication field is used to indicate the frequency domain start position of the single first HARQ feedback resource.
  • the first time domain resource indication field is specifically used to indicate the time of all transmission resources in the first number of transmission resources except the first transmission resource in 31 time slots after the time slot where the first transmission resource is located.
  • Domain position, and the number of bits of the first time domain resource indication domain is determined by the maximum number of transmission resources indicated in one SCI configured by high-layer signaling.
  • the L is the maximum number of transmission resources that can be indicated in an SCI, and the number of transmission resources indicated by the SCI each time is less than or equal to L.
  • the number of bits in the first time domain resource indicator field can be as shown in Table 1. When L is 2, the number of bits in the first time domain resource indicator field is 5; when L is 3, the first time domain resource The number of bits in the indication field is 9.
  • the number of bits of the first frequency domain resource indication field is determined by the maximum number of SCI transmission resources at one time L configured by high-layer signaling and the number of data transmission sub-channels included in a group of resources acquired by the first terminal device 110A.
  • a group of resources acquired by the first terminal device 110A may be a group of resources introduced in the resource allocation manner in the above-mentioned mode 2d, and the number of bits of the first frequency domain resource indicator field may be as shown in Table 1.
  • the first terminal device 110A schedules two transmission resources to the second terminal device 110B for transmitting the current TB, and schedules a first HARQ after the second transmission resource. Feedback resources.
  • the first terminal device 110A needs to explicitly indicate in the SCI of the second transmission resource that the third terminal device 110C needs to perform the second HARQ feedback on the second HARQ feedback resource corresponding to the current transmission resource, and finally the second terminal device 110B The first HARQ feedback is performed on the first HARQ feedback resource after the scheduled second transmission.
  • the first time interval indicator field indicates the time interval between the first SCI and the first transmission resource (time interval 1 in the figure), in units of time slots, The time domain position of the first transmission resource can be known; the first frequency domain index indication field indicates the frequency domain start position of the first transmission resource; the first time domain resource indication field indicates that the second transmission resource is in the first transmission In which of the 31 time slots after the resource, the time domain position of the second transmission resource can be known; the first frequency domain resource indication field indicates the first transmission resource in the first number of transmission resources. The frequency domain start position of each transmission resource and the frequency domain size of all transmission resources in the first number of transmission resources.
  • the frequency domain size is used to indicate the number of data transmission sub-channels occupied by the frequency domain, and the number of all transmission resources
  • the frequency domain is equal in size;
  • the second time interval indicator field indicates the time interval between the second HARQ feedback resource and the first HARQ feedback resource (time interval 2 in the figure);
  • the second frequency domain index indicator field indicates the first HARQ feedback resource The start position of the frequency domain.
  • the first electronic device 110A schedules multiple transmission resources and one first HARQ feedback resource for the second electronic device 110B, and the one first HARQ feedback resource is after the last transmission resource among the multiple transmission resources. Since the first terminal device 110A schedules the first HARQ feedback resource for the second terminal device 110B, the second terminal device 110B performs the first HARQ feedback on the first HARQ feedback resource after the scheduled last transmission resource.
  • multiple indication fields included in the SCI are used to indicate the time-frequency domain position information of multiple transmission resources and the time-frequency domain position information of a first HARQ feedback resource.
  • the frequency domain start position of the first HARQ feedback resource (indicated by the second frequency domain index) and the frequency domain resource position information of each transmission resource after the first transmission resource (indicated by the first frequency domain index)
  • the resource indication field indication can be jointly coded together and indicated by the second frequency domain resource indication field.
  • whether the first SCI schedules the first HARQ feedback resource can be judged by whether there is a second slot interval indication field. If there is a second slot interval indicator field, the last frequency domain start position indicated in the second frequency domain resource indicator field after joint coding is the frequency domain start position of the first HARQ feedback resource.
  • the second number when the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, and the second number of transmission resources is a single transmission resource, and the single transmission resource is The last one of the first number of transmission resources; the first SCI may include: a first time domain interval indicator field, a first frequency domain index indicator field, a first time domain resource indicator field, a second frequency domain resource indicator field, and a first Three time interval indication field.
  • the first time interval indicator field is used to indicate the time interval between the first SCI and the first transmission resource in the first number of transmission resources;
  • the first frequency domain index indicator field is used to indicate the first number of transmission resources The frequency domain start position of the first transmission resource in the first transmission resource;
  • the first time domain resource indication field is used to indicate the time domain resource position of each transmission resource after the first transmission resource in the first number of transmission resources;
  • the second frequency domain resource indication field is used to indicate the frequency domain starting position of each transmission resource after the first transmission resource in the first number of transmission resources, and the frequency domain size of all transmission resources in the first number of transmission resources.
  • the frequency domain size of all transmission resources is the same as the frequency domain start position of a single first HARQ feedback resource;
  • the third time interval indication field is used to indicate the difference between the second HARQ feedback resource corresponding to a single transmission resource and the single first HARQ feedback resource. The time interval between.
  • the first time domain resource indication field is similar to the above example, and the number of bits of the first time domain resource indication field may be as shown in Table 1.
  • the number of bits in the second frequency domain resource indicator field is configured by the highest number of transmission resources indicated in one SCI configured by high-level signaling, L, and the number of data transmission sub-channels included in a set of resources acquired by the first terminal device 110A S decided.
  • L the number of bits in the second frequency domain resource indicator field is calculated by the following formula:
  • the second terminal device 110B will not retransmit the first data on subsequent transmission resources of the current transmission resource. Since there is no first HARQ feedback resource after the current transmission resource, the second terminal device 110B cannot perform HARQ feedback to the first terminal device 110A in time, and needs to wait until the first HARQ feedback resource after the last transmission resource to report to the first terminal device. 110A performs HARQ feedback.
  • the second terminal device 110B can finally perform HARQ feedback to the first terminal device 110 through the first HARQ feedback resource, the first terminal device 110A cannot know in time that the second terminal device 110B will not transmit data on subsequent transmission resources of the current transmission resource. , Resulting in these subsequent resources being empty, and the first terminal device 110A cannot be recycled in time, resulting in a waste of resources. To this end, it is possible to consider multiple transmission resources and multiple first HARQ feedback resources scheduled by the first terminal device 110A, and configure one first HARQ feedback resource after any transmission resource among the multiple transmission resources.
  • each transmission resource in the second number of transmission resources is any one of the first number of transmission resources;
  • the first SCI includes: Time domain interval indication domain, first frequency domain index indication domain, first time domain resource indication domain, third frequency domain resource indication domain, HARQ feedback resource number indication domain (HARQ feedback resource number indication), multiple time interval indication domains , The third frequency domain index indication domain.
  • the first SCI schedules multiple transmission resources and one or more HARQ feedback resources, and one first HARQ feedback resource is configured after any transmission resource among the multiple transmission resources.
  • the resource indication field in the first SCI is used to indicate the time-frequency domain location information of these resources.
  • the first time interval indicator field is used to indicate the time interval between the first SCI and the first transmission resource in the first number of transmission resources;
  • the first frequency domain index indicator field is used to indicate the first number of transmission resources The frequency domain start position of the first transmission resource in the first transmission resource;
  • the first time domain resource indication field is used to indicate the time domain resource position of each transmission resource after the first transmission resource in the first number of transmission resources;
  • the three-frequency domain resource indicator field is used to indicate the frequency domain start position of each transmission resource after the first transmission resource in the first number of transmission resources and the frequency domain size of all transmission resources in the first number of transmission resources ,
  • the frequency domain size is used to indicate the number of data transmission sub-channels occupied by the transmission resource, and the frequency domain sizes of all transmission resources are equal;
  • the HARQ feedback resource quantity indicator field is used to indicate that the second number of transmission resources correspond to each other in a one-to-one relationship.
  • the first HARQ feedback resource of the second number of first HARQ feedback resources is configured after the two transmission resources; each time interval indicator field in the multiple time interval indicator fields is used to indicate the first HARQ feedback resource of the second number of transmission resources.
  • the frequency domain index indication field is used to indicate the frequency domain start position of each first HARQ feedback resource in the second number of first HARQ feedback resources.
  • the third frequency domain index indication field indicates the frequency domain starting position of each first HARQ feedback resource scheduled by the first SCI through joint coding, and since the frequency domain size of each first HARQ feedback resource is fixed, it is not Need additional instructions.
  • the number of bits in the third frequency domain index indication field is determined by the maximum number of transmission resources indicated in one SCI configured by high-level signaling, L, and the number of data transmission sub-channels included in a set of resources acquired by the first terminal device 110A. .
  • L high-level signaling
  • the number of bits in the third frequency domain index indication field is calculated by the following formula:
  • the first terminal device issues a piece of auxiliary link control information
  • the second terminal device can learn the resources scheduled by the first terminal device by detecting and decoding the auxiliary link control information.
  • the second terminal device can use the resource to perform secondary link transmission and second HARQ feedback with the third terminal device, and perform first HARQ feedback with the first terminal device according to the second HARQ feedback result. Since the time-frequency domain position information of the scheduled resource is indicated by the secondary link control information, it is beneficial to realize a resource allocation method in which the terminal device schedules resources for other terminal devices.
  • the second number when the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, and the single transmission resource is a first HARQ feedback resource.
  • the last one of a number of transmission resources; the first SCI also includes: a first frequency domain resource indicator field, a second time interval indicator field, and a second frequency domain index indicator field; wherein, the first frequency domain resource indicator field is used for Indicate the frequency domain start position of each transmission resource after the first transmission resource in the first number of transmission resources, the frequency domain size of all transmission resources in the first number of transmission resources, and the frequency domain size of all transmission resources Equal; the second time interval indicator field is used to indicate the time interval between the second HARQ feedback resource corresponding to a single transmission resource and a single first HARQ feedback resource; the second frequency domain index indicator field is used to indicate a single first HARQ feedback resource The start position of the frequency domain.
  • the second number when the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, and the single transmission resource is a first HARQ feedback resource.
  • the last one of a number of transmission resources; the first SCI includes: a second frequency domain resource indicator field and a third time interval indicator field; wherein the second frequency domain resource indicator field is used to indicate the first number of transmission resources The frequency domain start position of each transmission resource after the first transmission resource in, the frequency domain size of all transmission resources in the first number of transmission resources, and the frequency domain start position of a single first HARQ feedback resource, all The frequency domains of the transmission resources are equal in size; the third time interval indication field is used to indicate the time interval between the second HARQ feedback resource corresponding to a single transmission resource and the single first HARQ feedback resource.
  • the first information includes one of the following: a scheduling request and a buffer status report BSR.
  • FIG. 5 is a schematic structural diagram of a first terminal device 500 according to an embodiment of the present application, as shown in FIG. 5.
  • the first terminal device 500 includes a processor 510, a memory 520, a communication interface 530, and at least one communication bus for connecting the processor 510, the memory 520, and the communication interface 530.
  • the embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the method as described in the above method embodiment. Part or all of the steps described by a terminal device and a second terminal device.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the ASIC may be located in an access network device, a target network device, or a core network device.
  • the processor and the storage medium may also exist as discrete components in the access network device, the target network device, or the core network device.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via 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 accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil d'indication de ressources pour des informations de commande de liaison latérale, ainsi qu'un dispositif terminal. Le procédé comprend les étapes suivantes : un premier dispositif terminal envoie des premières SCI à un deuxième dispositif terminal, les premières SCI étant utilisées pour indiquer un premier nombre de ressources de transmission et un second nombre de premières ressources de rétroaction HARQ, le premier nombre de ressources de transmission étant utilisé pour effectuer une transmission de données et de SCI entre le deuxième dispositif terminal et un troisième dispositif terminal, et le second nombre de premières ressources de rétroaction HARQ étant utilisé par le second dispositif terminal pour effectuer une première rétroaction HARQ sur le premier dispositif terminal. Selon l'invention, on peut voir que les informations de localisation du domaine temps-fréquence d'une ressource planifiée sont indiquées au moyen d'informations de commande de liaison latérale, ce qui facilite la mise en œuvre d'un mode d'attribution de ressources dans lequel un dispositif terminal planifie des ressources pour d'autres dispositifs terminaux.
PCT/CN2021/075892 2020-02-20 2021-02-07 Procédé et appareil d'indication de ressources pour informations de commande de liaison latérale, et dispositif terminal Ceased WO2021164603A1 (fr)

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