WO2021072662A1 - Procédé et appareil de rétroaction de demande de répétition automatique hybride - Google Patents

Procédé et appareil de rétroaction de demande de répétition automatique hybride Download PDF

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Publication number
WO2021072662A1
WO2021072662A1 PCT/CN2019/111348 CN2019111348W WO2021072662A1 WO 2021072662 A1 WO2021072662 A1 WO 2021072662A1 CN 2019111348 W CN2019111348 W CN 2019111348W WO 2021072662 A1 WO2021072662 A1 WO 2021072662A1
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time
value
sidelink
frequency resource
offset value
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PCT/CN2019/111348
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English (en)
Chinese (zh)
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杨帆
黎超
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华为技术有限公司
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Priority to PCT/CN2019/111348 priority Critical patent/WO2021072662A1/fr
Priority to CN201980100267.9A priority patent/CN114365516A/zh
Publication of WO2021072662A1 publication Critical patent/WO2021072662A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]

Definitions

  • This application relates to the field of communication technology, and in particular to a hybrid automatic repeat request (HARQ) feedback method and device.
  • HARQ hybrid automatic repeat request
  • the physical downlink shared channel (PDSCH) issued by the base station requires the terminal device to feed back corresponding HARQ information.
  • the base station will set different timings to determine when to let the terminal device feedback and report the HARQ information. Since it takes a certain amount of time when the terminal device processes the PDSCH, the timing can reflect the processing capability of the terminal device.
  • the transmitting-side terminal device sends sidelink data to the receiving-side terminal device, and the receiving-side terminal device needs to feed back the HARQ information of the sidelink data to the transmitting-side terminal device.
  • HARQ information is carried on the sidelink physical feedback channel (PSFCH), and PSFCH resources are configured periodically.
  • a slot offset value k can be configured, starting from the slot where the sidelink data ends.
  • HARQ information is fed back on PSFCH resources separated by at least K time slots.
  • the receiving device when sidelink data ends in time slot n, after the interval of K time slots, if there are PSFCH resources on time slot n+K, the receiving device will use this time slot n The HARQ information is fed back on the PSFCH resource of +K. If there is no PSFCH resource on the time slot n+K, the receiving device feeds back the HARQ information on the first PSFCH resource after the time slot n+K.
  • the agreed value of k is 2, that is, 2 time slots. However, 2 time slots cannot satisfy all conditions, resulting in HARQ feedback failure.
  • the present application provides a HARQ feedback method and device, which are used to solve the problem that the time slot offset value in the current sidelink communication is not applicable in some scenarios and causes the HARQ feedback failure.
  • the HARQ feedback method can be applied to network equipment or terminal equipment.
  • the method includes: determining the time offset value according to the time domain resource configuration of the sidelink resource, and the sidelink resource is The time-frequency resource that carries sidelink control information (SCI), or the time-frequency resource that carries HARQ information, or the time-frequency resource that carries sidelink data; the time offset value refers to the time-frequency resource that carries sidelink data and the HARQ information that carries sidelink data The time interval that needs to be met between time-frequency resources.
  • a longer time offset value is configured for some scenarios where the sidelink data processing time is longer, so that the terminal device can have more processing time, thereby avoiding the inability to report HARQ information due to insufficient PSSCH processing time Case.
  • the time-frequency resource carrying the SCI may be a sidelink physical control channel (PSCCH).
  • PSCCH sidelink physical control channel
  • the time offset value can be determined according to the time length of the PSCCH, and a longer time offset value can be configured when the time length of the PSCCH is longer, so that the terminal equipment can be more Processing time, in turn, can avoid the situation that the HARQ information cannot be reported due to insufficient PSSCH processing time.
  • the time-frequency resources that carry the SCI include the time-frequency resources that carry the first-level SCI and the time-frequency resources that carry the second-level SCI, where the first SCI is used to indicate the resources that carry the second-level SCI Information and PSSCH resource information.
  • the second SCI is used to indicate at least one of the following information: HARQ feedback information, HARQ process, and new data indication (NDI). Since the two-level SCI requires more analysis time, through the above design, in the two-level SCI scenario, the time offset value can be determined according to the sum of the time length of the first level SCI and the second level SCI. When the total time length is longer, a longer time offset value is configured, so that the terminal device can have more processing time, thereby avoiding the situation that the HARQ information cannot be reported due to insufficient PSSCH processing time.
  • the time offset value when the number of time units included in the time-frequency resource carrying the SCI is greater than the first threshold, the time offset value may be the first value.
  • the time offset value When the number of time units included in the time-frequency resource carrying the SCI is less than or equal to the first threshold, the time offset value may be a second value; where the first value is greater than the second value.
  • the time offset value can be configured according to the number of time units carrying the SCI time-frequency resource, so that a longer time offset value can be configured when the number of time units carrying the SCI time-frequency resource is large, so that the terminal device can have More processing time.
  • the time offset value may be the first value.
  • the time-frequency resource configuration of the time-frequency resource carrying the SCI and the time-frequency resource carrying the sidelink data are the same, the time-frequency resource carrying the SCI is longer. By configuring a longer time offset value, the terminal device can have more More processing time.
  • the time-frequency resource carrying HARQ information may be PSFCH.
  • the time offset value can be determined according to the time domain resource configuration of the PSFCH.
  • the time offset value when the start symbol of the PSFCH is before the first symbol, the time offset value may be the first value.
  • the time offset value may be the second value; wherein, the first value is greater than the second value.
  • the terminal device When the start symbol of the PSFCH is relatively forward, the terminal device has a shorter time to process the sidelink physical shared channel (PSSCH). In the above design, the terminal device can have more time to resolve the PSSCH through a larger time offset value. .
  • PSSCH sidelink physical shared channel
  • the length of the PSFCH can be configurable. Through the above design, the flexibility of PSFCH can be improved.
  • the time-frequency resource carrying sidelink data may be PSSCH.
  • the time offset value can be configured according to the PSSCH, which can avoid the HARQ feedback failure caused by the long PSSCH time length and the insufficient processing time of the terminal device.
  • the time offset value when there are N modulation and demodulation reference signals (DMRS) of the PSSCH, the time offset value may be the first value; or, when there are M DMRS of the PSSCH, the time offset value may be Is the second value; where N and M are both integers greater than 0, and N is greater than M, the first value is greater than the second value.
  • DMRS modulation and demodulation reference signals
  • the HARQ feedback method provided by the embodiments of the present application can be applied to network equipment or terminal equipment.
  • the method includes: determining a time offset value according to the first subcarrier interval and the second subcarrier interval , Where the first subcarrier interval is the subcarrier interval of the carrier where the sidelink data is located, the second subcarrier interval is the subcarrier interval of the carrier where the HARQ information is located, and the time offset value refers to the time-frequency resource that carries the sidelink data and the time-frequency resource that carries the sidelink data.
  • the time interval that needs to be met between the time-frequency resources of the HARQ information.
  • the flexibility of configuring the time offset value can be achieved, thereby avoiding the time offset value being too small, resulting in The processing time of the PSSCH of the terminal device is insufficient, which in turn leads to the problem of HARQ feedback failure.
  • the time offset value when the first subcarrier interval is greater than the second subcarrier interval, the time offset value may be the first value; or, when the first subcarrier interval is less than the second subcarrier interval, the time offset The shift value can be a second value.
  • the time length of the time slot under different subcarrier intervals is different, where the first value is greater than the second value.
  • the time offset value can be determined according to the time domain resource configuration of the sidelink resource of the sidelink, and the sidelink resource is the time when the sidelink control information SCI is carried. Frequency resources, or time-frequency resources that carry HARQ information, or time-frequency resources that carry sidelink data.
  • this application provides a HARQ feedback device, which may be a communication device, or a chip or chipset in the communication device, where the communication device may be a network device or a terminal device.
  • the device may include a processing module, and may also include a transceiver module.
  • the processing module may be a processor, and the transceiver module may be a transceiver;
  • the device may also include a storage module, and the storage module may be a memory; the storage module is used to store instructions, and the processing module The instructions stored in the storage module are executed, so that the communication device executes the corresponding functions in the first aspect or the second aspect described above.
  • the processing module may be a processor, and the transceiver module may be an input/output interface, a pin or a circuit, etc.; the processing module executes the instructions stored in the storage module to To enable the communication device to perform the corresponding function in the first aspect or the second aspect, the storage module may be a storage module (for example, a register, a cache, etc.) in the chip or chipset, or it may be a storage module in the terminal device located in the terminal device. A memory module external to the chip or chipset (for example, read-only memory, random access memory, etc.).
  • a HARQ feedback device which includes a processor, a communication interface, and a memory.
  • the communication interface is used to transmit information, and/or messages, and/or data between the device and other devices.
  • the memory is used to store computer-executable instructions.
  • the processor executes the computer-executable instructions stored in the memory, so that the device executes any design or second aspect of the first aspect or the first aspect described above. Or the method for indicating signal transmission described in any design of the second aspect.
  • the present application also provides a computer-readable storage medium having instructions stored in the computer-readable storage medium, which when run on a computer, cause the computer to execute the methods described in the above aspects.
  • this application also provides a computer program product including instructions, which when run on a computer, cause the computer to execute any of the above-mentioned designs in the first aspect or the first aspect, the second aspect or the second aspect.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by this application.
  • FIG. 2 is a schematic diagram of a PSFCH resource provided by this application.
  • FIG. 3 is a schematic diagram of HARQ feedback provided by this application.
  • FIG. 4 is a schematic flowchart of a HARQ feedback method provided by this application.
  • FIG. 5 is a schematic diagram of PSSCH and PSCCH resource configuration provided by this application.
  • FIG. 6 is a schematic diagram of HARQ feedback provided by this application.
  • FIG. 7 is a schematic diagram of another PSSCH and PSCCH resource configuration provided by this application.
  • FIG. 8 is a schematic diagram of another HARQ feedback provided by this application.
  • FIG. 9 is a schematic diagram of a fourth scenario provided by this application.
  • FIG. 10 is a schematic diagram of the architecture of scenario 5 provided by this application.
  • FIG. 11 is a schematic diagram of a PSSCH DMRS provided by this application.
  • FIG. 12 is a schematic diagram of another PSSCH DMRS provided by this application.
  • FIG. 13 is a schematic flowchart of another HARQ feedback method provided by this application.
  • FIG. 14 is a schematic structural diagram of a HARQ feedback device provided by this application.
  • FIG. 15 is a schematic structural diagram of a terminal device provided by this application.
  • FIG. 16 is a schematic structural diagram of a network device provided by this application.
  • the HARQ feedback method provided in this application can be applied to 5G new radio (NR) Unlicensed (Unlicensed) systems, or can also be applied to other communication systems, for example, it can be the Internet of Things (IoT) System, vehicle-to-everything (V2X) system, narrowband internet of things (NB-IoT) system, long term evolution (LTE) system, it can also be the fifth generation (5G) )
  • the communication system can also be a hybrid architecture of LTE and 5G, a 5G new radio (NR) system, and a new communication system that will appear in the development of future communication.
  • the terminal involved in the embodiments of the present application is an entity on the user side for receiving or transmitting signals.
  • the terminal may be a device that provides voice and/or data connectivity to the user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and so on.
  • the terminal can also be other processing equipment connected to the wireless modem.
  • the terminal can communicate with one or more core networks through a radio access network (RAN).
  • RAN radio access network
  • the terminal can also be called a wireless terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, Remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), user equipment (user device), or user equipment (user equipment, UE), etc.
  • the terminal equipment can be a mobile terminal, such as a mobile phone (or called a "cellular" phone) and a computer with a mobile terminal.
  • a mobile terminal such as a mobile phone (or called a "cellular" phone) and a computer with a mobile terminal.
  • the terminal device can also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), and other equipment.
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • Common terminal devices include, for example: mobile phones, tablet computers, laptops, handheld computers, mobile internet devices (MID), wearable devices, such as smart watches, smart bracelets, pedometers, smart home appliances, such as smart Refrigerators, smart washing machines, etc., but the embodiments of the present application are not limited thereto.
  • MID mobile internet devices
  • wearable devices such as smart watches, smart bracelets, pedometers
  • smart home appliances such as smart Refrigerators, smart washing machines, etc.
  • the network device involved in the embodiments of the present application is an entity on the network side for transmitting or receiving signals, and can be used to convert received air frames and Internet protocol (IP) packets to each other, as A router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network and so on.
  • IP Internet protocol
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network equipment can be an evolved Node B (eNB or e-NodeB) in LTE, a new radio controller (NR controller), or a gNode B (gNB) in a 5G system.
  • eNB evolved Node B
  • NR controller new radio controller
  • gNode B gNode B
  • Network equipment can cover one or more cells.
  • a communication system provided by an embodiment of this application includes a network device and six terminal devices, taking UE1 to UE6 as examples.
  • UE1 to UE6 can send signals to network equipment on the uplink, and the network equipment can receive uplink signals sent by UE1 to UE6.
  • UE4 to UE6 can also form a sub-communication system.
  • the network equipment may send downlink signals to UE1, UE2, UE3, and UE5 on the downlink.
  • UE5 can send signals to UE4 and UE6 in the sidelink (SL) between terminals based on the D2D technology.
  • Fig. 1 is only a schematic diagram, and this application does not specifically limit the type of the communication system, and the number and type of devices included in the communication system.
  • D2D communication technology refers to a communication method that directly communicates between two peer-to-peer user nodes.
  • D2D communication has different applications in different networks, such as Wi-Fi Direct (Direct) or Bluetooth technology (a short-distance time division duplex communication) in a WIFI network.
  • Wi-Fi Direct Direct
  • Bluetooth a short-distance time division duplex communication
  • 3GPP 3rd generation partnership project
  • LTE-D2D/V2X LTE-V2X (Vehicle to everything) technology in LTE
  • LTE-V2X Vehicle to everything
  • D2D communication technology aims to enable user communication devices within a certain distance to communicate directly to reduce the load on the serving base station.
  • the PDSCH delivered by the base station requires the terminal device to feed back the corresponding HARQ information.
  • the base station will set different timings to determine when to let the terminal device feedback and report the HARQ information. Since it takes a certain amount of time for the terminal device to process the PDSCH, this timing cannot be set too small, otherwise the terminal device may not have time to process the PDSCH and cannot report the HARQ information.
  • sidelink defines a dedicated HARQ feedback channel—the physical sidelink feedback channel (PSFCH).
  • the resources of the PSFCH are configured periodically.
  • the configuration of the PSFCH can be 1 time slot, 2 time slots, 4 time slots, and so on.
  • a slot offset value k is configured to indicate the minimum time interval for the receiving device to feed back HARQ information.
  • the slot in which the receiving device sends PSFCH is later than or equal to slot n+k
  • the nearest time slot containing PSFCH resources In other words, the distance from the time slot where the side-line data ends to the time slot of the side-line feedback must be greater than or equal to k time slots.
  • the sidelink data is carried on time slot n, and after an interval of K time slots, if there are PSFCH resources on time slot n+K, the receiving device feeds back HARQ information on the PSFCH resource of time slot n+K.
  • the PSFCH configuration period is 2 time slots, and K is equal to 2, as shown in Figure 3.
  • the sidelink physical shared channel (PSSCH) 2 feeds back HARQ information on the PSFCH 2, and the PSSCH 4 is on the PSFCH 3.
  • HARQ information is fed back on. If there is no PSFCH resource in the time slot n+K, the receiving device feeds back HARQ information on the first PSFCH resource after the time slot n+K.
  • PSSCH 1 feeds back HARQ information on PSFCH 2
  • PSSCH 3 feeds back HARQ information on PSFCH 3.
  • the agreed value of k is 2, that is, 2 time slots.
  • 2 time slots cannot satisfy all situations. For example, when the number of PSSCH symbols is relatively large, it may take more time for the terminal equipment to parse the PSSCH. After 2 time slots, the terminal equipment may not have processed the PSFCH when it arrives. As shown in Figure 3, when the number of symbols of PSSCH 1 is large, the terminal device may not have finished processing PSSCH 1 when PSFCH 1 arrives, and thus cannot feed back PSSCH 1 on PSFCH 1.
  • HARQ information when the number of symbols of PSSCH 1 is large, the terminal device may not have finished processing PSSCH 1 when PSFCH 1 arrives, and thus cannot feed back PSSCH 1 on PSFCH 1.
  • the terminal device needs more time to parse the SCI, so that the PSSCH will be received at the time, so after 2 time slots
  • the terminal device may not have time to process the PSSCH, and thus cannot feed back the HARQ information.
  • the PSSCH has not been processed.
  • the terminal device needs more time to resolve the SCI. Therefore, when the PSFCH 1 arrives, the terminal device may not have time to process the PSSCH 1, and thus cannot feed back the PSSCH 1 in the PSFCH 1.
  • HARQ information when the sidelink system supports two-stage sidelink control information (SCI) (2stage SCI).
  • the embodiments of the present application provide a HARQ feedback method and device.
  • the method and the device are based on the same technical idea. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • the multiple mentioned in this application refers to two or more.
  • LTE D2D resource configuration methods are divided into two types, Mode1 and Mode2.
  • the resource configuration method of Mode1 is that the base station configures multiple Resource Pools to the D2D device through RRC signaling in advance. When the D2D device requests D2D transmission, the base station uses the DCI signal Let the corresponding Resource Pool be activated for D2D transmission.
  • the resource configuration method of Mode2 is different from the resource configuration method of Mode1 in that when the D2D device needs to perform D2D transmission, the D2D device autonomously selects some time-frequency resources from the predefined Resource Pool for D2D transmission.
  • V2X resource configuration methods are divided into two modes, Mode1 and Mode2.
  • the resource configuration method of Mode1 is that the base station allocates resources to terminal devices through RRC signaling configuration and DCI signaling in advance.
  • the resource configuration method of Mode2 is different from the resource configuration method of Mode1 in that when the terminal device needs to perform side link transmission, the terminal device autonomously selects some time-frequency resources from the predefined Resource Pool for V2X transmission.
  • a terminal device For a terminal device, it may receive sidelink data (such as PSSCH) sent by one or more other terminal devices.
  • sidelink data such as PSSCH
  • the terminal device that receives the PSSCH is called the receiving device
  • the terminal device that sends the PSSCH is called the transmitting device.
  • the receiving device As far as a receiving device is concerned, it may receive the PSSCH sent by one or more other sending devices.
  • the sending device and the receiving device are relative terms, the sending device may also have a receiving function, and the receiving device may also have a sending function.
  • the two terminal devices can communicate directly without passing through the network device.
  • the manner in which the receiving device communicates with the sending device may be referred to as D2D transmission, or it may also be referred to as sidelink communication, or it may also be referred to as other, which is not specifically limited here.
  • HARQ information may also be referred to as HARQ codebook or the like.
  • Embodiment 1 Refer to FIG. 4, which is a flowchart of a HARQ feedback method provided by this application.
  • the method can be applied to network equipment and terminal equipment.
  • the network device in LTE D2D or NR V2X Mode 1, the network device can use the method provided in this application to determine the time offset value, and in LTE D2D or NR V2X Mode 2, the terminal device can use the method provided in this application to determine the time offset value .
  • the method includes:
  • K refers to the time interval that needs to be satisfied between the time-frequency resource carrying sidelink data and the time-frequency resource carrying sidelink data corresponding to HARQ information. It can also be understood as the time-frequency resource carrying sidelink data and the time-frequency resource carrying sidelink data corresponding to HARQ information.
  • K time slots between the time-frequency resources which can also be understood as the minimum time interval between the time-frequency resource that carries the sidelink data and the time-frequency resource that carries the HARQ information corresponding to the sidelink data.
  • time offset value K in the embodiment of the present application is only described in units of time slots, and the unit of the time offset value K is not specifically limited. In specific implementations, other time granularity units may also be used. For example, mini-slots, symbols, etc.
  • the sidelink resource is a time-frequency resource that carries the sidelink control information SCI.
  • the time-frequency resource that carries the SCI may be a sidelink physical control channel (physical sidelink control channel, PSCCH).
  • the time domain resource configuration of the sidelink resource may refer to the number of time units of the PSCCH.
  • the time unit can be, but is not limited to, time slots, mini-slots, symbols, and so on.
  • This exemplary description can be applied to the scenario of the first-level SCI, that is, the sending device sends the first-level SCI to the receiving device, and the SCI is used to indicate the resource size of the PSSCH, modulation and coding scheme (modulation and coding scheme, MCS), and demodulation.
  • the sending device sends a two-stage SCI to the receiving device, where the first-stage SCI can be carried on the PSCCH to indicate the resource information for carrying the second-stage SCI
  • the second-level SCI can be carried on the PSCCH or PSSCH for transmission, and is used to indicate HARQ feedback information, HARQ process, new data indication (NDI), etc.
  • the time-frequency resources that carry the SCI may include the time-frequency resources that carry the first-level SCI and the time-frequency resources that carry the second-level SCI.
  • the time-domain resource configuration of sidelink resources can refer to the total number of time units occupied by the first-level SCI and the second-level SCI.
  • the number of time units occupied by the first-level SCI may be equal to the number of time units of the PSCCH.
  • the number of time units of the PSCCH can be equal to the total number of time units available for sidelink transmission in a time slot.
  • the time unit can be, but is not limited to, time slots, mini-slots, symbols, and so on. Take the time unit as the symbol as an example for description.
  • time unit available for sidelink transmission in a time slot may not include symbols used for automatic gain control (AGC) adjustment and symbols used for gap (gap).
  • AGC automatic gain control
  • the time offset value K when the number of symbols included in the time-frequency resource carrying the SCI is greater than the first threshold, the time offset value K may be the first value. When the number of time units included in the time-frequency resource carrying the SCI is less than the first threshold, the time offset value K may be the second value. When the number of time units included in the time-frequency resource carrying the SCI is equal to the first threshold, the time offset value K may be the first value or the second value. Among them, the first value is greater than the second value.
  • the time offset value is determined to be the first value when the time domain resource configuration of the time-frequency resource carrying the SCI and the time-frequency resource carrying the sidelink data are the same.
  • the first value is 3 and the second value is 2 as an example for description.
  • Scenario 1 If the relationship between the time-frequency resources of the PSSCH and the time-frequency resources of the PSCCH is, a part of the time-domain resources of the PSSCH is the same as the time-domain resources of the PSCCH, and a part of the frequency-domain resources of the PSSCH overlaps with the frequency-domain resources of the PSCCH, such as Shown in Figure 5.
  • the number of PSCCH symbols can be configured.
  • the SCI contains level 1
  • L PSCCH ⁇ X K can be equal to 3
  • L PSCCH ⁇ X K can be equal to 2
  • L PSCCH Is the number of time units of PSCCH and X is the first threshold.
  • the PSFCH configuration period is 2 time slots as an example.
  • the number of PSCCH symbols can be equal to the total number of symbols available for sideline transmission in a slot. It is understandable that the time unit available for sidelink transmission in a time slot may not include the symbols used for AGC adjustment and the symbols used for gap.
  • Scenario 2 If the relationship between the time-frequency resources of the PSCCH and the time-frequency resources of the PSCCH is that the time-domain resources of the PSSCH and the time-domain resources of the PSCCH completely overlap, a part of the frequency-domain resources of the PSSCH and the frequency-domain resources of the PSCCH do not overlap, such as Shown in Figure 7.
  • the number of PSCCH symbols cannot be configured.
  • the time offset value K may be equal to the first value.
  • the number of PSCCH symbols can be equal to the total number of symbols available for sideline transmission in a slot.
  • the unit may not contain the symbols used for AGC adjustment and the symbols used for gap.
  • the sidelink resources are time-frequency resources that carry HARQ information.
  • the time-frequency resource carrying HARQ information may be PSFCH.
  • the time-domain resource configuration of the sidelink resource may refer to the position of the start symbol of the PSFCH.
  • the time offset value K when the start symbol of the PSFCH is before the first symbol, the time offset value K may be the first value.
  • the time offset value K When the start symbol of the PSFCH is after the first symbol, the time offset value K may be the second value.
  • the start symbol of the PSFCH is the first symbol, the time offset value K may be the first value or the second value. Among them, the first value is greater than the second value.
  • the first symbol may be symbol 7.
  • the PSFCH configuration period is 2 time slots as an example. It should be understood that FIG. 8 is only an exemplary illustration, and does not limit the size of the time domain resource of the PSFCH, nor does it limit the size of the frequency domain resource of the PSFCH.
  • the time offset value K may also be determined according to the number of symbols of the PSFCH, or the number of symbols of the PSFCH and the transmission position.
  • the PSFCH can adopt a "short format" of one symbol, that is, the PSFCH includes 1 or 2 symbols. And the PSFCH should be sent before the symbol i.
  • the PSFCH can be sent in a "long format", where the number of symbols of the PSFCH can be fixed M, and M is an integer greater than 2.
  • M is greater than (14-i)
  • the start symbol of PSFCH is before symbol i.
  • M can also be equal to the number of symbols used for sidelink transmission in the current time slot.
  • the symbols of PSFCH may not include the symbols used for AGC and gap.
  • PSFCH can be sent in "long format", where the number of symbols of PSFCH can be configured within the range of [P, Q], where P is an integer greater than 2.
  • the range of [P, Q] can include all the symbols used for sidelink transmission in the current time slot. If the PSFCH is sent on the last 14-i symbols in a time slot, when the number of PSFCH symbols is greater than 14-i-1, k can be equal to 3.
  • the symbols of PSFCH may not include the symbols used for AGC and gap.
  • Scenario 4 When the sidelink link shares the carrier with the Uu link, not all time slots on a carrier are used for sidelink link transmission, or not all symbols in a time slot are used for sidelink link Sent.
  • flexible symbols and/or uplink symbols can be used for sidelink transmission.
  • the transmission of the sidelink link may start to be transmitted on different symbols in a time slot. Therefore, when the flexible symbol and/or uplink symbol used for sideline transmission in the time slot start before the first i symbols of the time slot, for example, as shown in Figure 9, the starting symbol of the PSFCH may be Before the symbol i.
  • the format of the PSFCH can be format-indifferent, and it can be either a long format or a short format.
  • Scenario 5 When the transmission of sidelink data and the HARQ feedback of sidelink data are on different carriers, since the number of symbols used to send sidelink data on each carrier is different, it may also cause the starting symbol of PSFCH to be before symbol i, such as Shown in Figure 10.
  • the sidelink resource is a time-frequency resource that carries sidelink data.
  • the time-frequency resource carrying sidelink data may be PSSCH.
  • the time-domain resource configuration of sidelink resources may refer to the number of DMRS of PSSCH.
  • the time offset value K when there are N DMRSs of the PSSCH, the time offset value K may be the first value.
  • the time offset value K may be the second value.
  • N and M are both integers greater than 0, and N is greater than M, and the first value is greater than the second value.
  • the time offset value K when the number of DMRS of the PSSCH is 2, the time offset value K may be 2. As shown in FIG. 12, when the number of DMRS of the PSSCH is 4, the time offset value K may be 3.
  • additional DMRS additional DMRS
  • the time offset value K when the DMRS of the PSSCH is greater than the second threshold, the time offset value K may be the first value. When the DMRS of the PSSCH is less than the second threshold, the time offset value K may be the second value. When the DMRS of the PSSCH is equal to the second threshold, the time offset value K may be the first value or the second value. Among them, the first value is greater than the second value.
  • DMRS front-loaded DMRS
  • DMRS front-loaded DMRS
  • step S401 may be executed by a network device.
  • the network device may send a resource pool (Resource Pool, RP) configuration to the terminal device, where the RP configuration carries the time offset value K. Therefore, the receiving device can perform HARQ feedback to the sending device based on the time offset value.
  • resource Pool Resource Pool
  • step S401 may be executed by a terminal device. Therefore, the receiving device can perform HARQ feedback to the sending device based on the time offset value.
  • the receiving device after receiving the PSSCH sent by the sending device, the receiving device feeds back the HARQ information of the PSSCH after an interval of K time slots, specifically, on the PSFCH resource that arrives first after the interval of K time slots.
  • the HARQ information of the PSSCH is transmitted.
  • a longer time offset value is configured for some scenarios where the PSSCH processing time is longer, so that the HARQ information cannot be reported due to insufficient PSSCH processing time.
  • Embodiment 2 Refer to FIG. 13, which is a flowchart of another HARQ feedback method provided by this application.
  • the method can be applied to network equipment and terminal equipment.
  • the network device in LTE D2D or NR V2X Mode 1, the network device can use the method provided in this application to determine the time offset value, and in LTE D2D or NR V2X Mode 2, the terminal device can use the method provided in this application to determine the time offset value .
  • the method includes:
  • the receiving device determines the time offset value according to the first subcarrier interval and the second subcarrier interval, where the first subcarrier interval is the subcarrier interval of the carrier where the sidelink data is located, and the second subcarrier interval is the carrier where the HARQ information is located.
  • Subcarrier interval, time offset value refers to the time interval that needs to be satisfied between the time-frequency resource carrying sidelink data and the time-frequency resource carrying sidelink data HARQ information. It can also be understood that there is at least the K time slots between the time-frequency resource carrying sidelink data and the time-frequency resource carrying sidelink data corresponding to HARQ information. It can also be understood that the time-frequency resource carrying sidelink data corresponds to the time-frequency resource carrying sidelink data. The minimum time interval between time-frequency resources of HARQ information.
  • the time offset value when the first subcarrier interval is greater than the second subcarrier interval, the time offset value may be the first value, as shown in FIG. 12.
  • the time offset value when the first subcarrier interval is smaller than the second subcarrier interval, the time offset value may be the second value. Among them, the first value is greater than the second value.
  • step S401 in the first embodiment can be used to determine the time offset value, which will not be repeated here.
  • step S401 may be executed by a network device.
  • the network device may send a resource pool (Resource Pool, RP) configuration to the terminal device, where the RP configuration carries the time offset value K. Therefore, the receiving device can perform HARQ feedback to the sending device based on the time offset value.
  • resource Pool Resource Pool
  • step S401 may be executed by a terminal device. Therefore, the receiving device can perform HARQ feedback to the sending device based on the time offset value.
  • the embodiment of the present application provides a HARQ feedback device.
  • the structure of the HARQ feedback device may be as shown in FIG. 14, and includes a processing module 1401.
  • the HARQ feedback device can be specifically used to implement the methods described in the embodiments of Figures 4 to 12.
  • the device can be the communication device itself, or the chip or chipset or chip in the communication device. Used to perform part of the function of the related method, the communication device can be a network device or a terminal device.
  • the processing module 1401 is configured to determine the time offset value according to the time-domain resource configuration of the sidelink resource, the sidelink resource is the time-frequency resource carrying SCI, or the time-frequency resource carrying HARQ information, or the time-frequency resource carrying sidelink data;
  • the time offset value refers to the time interval that needs to be satisfied between the time-frequency resource that carries the sidelink data and the time-frequency resource that carries the HARQ information corresponding to the sidelink data.
  • the time-frequency resource carrying the SCI may be PSCCH.
  • the time-frequency resource carrying the SCI includes the time-frequency resource carrying the first-level SCI and the time-frequency resource carrying the second-level SCI, where the first SCI is used to indicate the resource information of the second-level SCI and the PSSCH resource information,
  • the second SCI is used to indicate at least one of the following information: HARQ feedback information, HARQ process, and new data indication (new data indication,) NDI.
  • the processing module 1401 when determining the time offset value according to the time domain resource configuration of the sidelink resource, can be specifically used: when the number of time modules included in the time-frequency resource carrying the SCI is greater than the first threshold The time offset value is determined to be the first value; or, when the number of time modules included in the time-frequency resource carrying the SCI is less than or equal to the first threshold value, the time offset value is determined to be the second value; wherein the first value is greater than the first value Two values.
  • the processing module 1401 when determining the time offset value according to the time domain resource configuration of the sidelink resource, may also be specifically used for: when carrying the time-frequency resource of the SCI and the time-frequency resource of the sidelink data.
  • the time offset value is determined to be the first value.
  • the time-frequency resource carrying HARQ information is PSFCH.
  • the processing module 1401 when determining the time offset value according to the time domain resource configuration of the sidelink resource, may be specifically used to determine the time offset value when the start symbol of the PSFCH is before the first symbol The first value; or, when the start symbol of the PSFCH is the first symbol or after the first symbol, it is determined that the time offset value is the second value; wherein the first value is greater than the second value.
  • the time-frequency resource carrying sidelink data is PSSCH.
  • the processing module 1401 when determining the time offset value according to the time domain resource configuration of the sidelink resource, may be specifically used to: when there are N DMRSs of the PSSCH, determine the time offset value to be the first value Or, when there are M DMRSs of the PSSCH, the time offset value is determined to be the second value; where N and M are both integers greater than 0, and N is greater than M, and the first value is greater than the second value.
  • the HARQ feedback device may be specifically used to implement the method described in the embodiment of FIG. 13.
  • the device may be the communication device itself, or the chip or chipset or the chip used in the communication device.
  • the communication device can be a network device or a terminal device.
  • the processing module 1401 is configured to determine the time offset value according to the first subcarrier interval and the second subcarrier interval, where the first subcarrier interval is the subcarrier interval of the carrier where the sidelink data is located, and the second subcarrier interval is HARQ The sub-carrier interval of the carrier where the information is located.
  • the time offset value refers to the time interval that needs to be satisfied between the time-frequency resource carrying sidelink data and the time-frequency resource carrying sidelink data HARQ information.
  • the processing module 1401 when determining the time offset value according to the first subcarrier interval and the second subcarrier interval, may be specifically configured to: determine the time when the first subcarrier interval is greater than the second subcarrier interval The offset value is the first value; or, when the first subcarrier interval is less than the second subcarrier interval, the time offset value is determined to be the second value; or, when the first subcarrier interval is equal to the second subcarrier interval, according to The time-domain resource configuration of the sidelink resource determines the time offset value.
  • the sidelink resource is the time-frequency resource of the SCI, or the time-frequency resource that carries HARQ information, or the time-frequency resource that carries the sidelink data; wherein, the first value is greater than the second value.
  • the division of modules in the embodiments of this application is illustrative, and is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of this application can be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software function modules. It can be understood that, for the function or implementation of each module in the embodiment of the present application, reference may be made to the related description of the method embodiment.
  • FIG. 15 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device can be applied to the system shown in FIG. 1 to perform the functions of the first terminal device in the foregoing method embodiment.
  • FIG. 15 only shows the main components of the terminal device.
  • the terminal device 150 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute the software program, and process the data of the software program, for example, to support the terminal device to perform the actions described in the above method embodiments, such as
  • the time offset value is determined according to the time domain resource configuration of the sidelink resource, the time offset value is determined according to the first subcarrier interval and the second subcarrier interval, and so on.
  • the memory is mainly used to store software programs and data.
  • the control circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves, such as feeding back HARQ information to the second terminal device under the control of the processor.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the memory, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 15 only shows one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories.
  • the memory may also be referred to as a storage medium or storage device.
  • the memory may be a storage element on the same chip as the processor, that is, an on-chip storage element, or an independent storage element, which is not limited in the embodiment of the present application.
  • the terminal device may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data
  • the central processing unit is mainly used to control the entire terminal device. , Execute the software program, and process the data of the software program.
  • the processor in FIG. 15 can integrate the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit can also be independent processors and are interconnected by technologies such as a bus.
  • the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and various components of the terminal device may be connected through various buses.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and the control circuit with the transceiving function can be regarded as the transceiving unit 1501 of the terminal device 150, for example, to support the terminal device to perform the receiving function and the transmitting function.
  • the processor 1502 having processing functions is regarded as the processing unit 1502 of the terminal device 150.
  • the terminal device 150 includes a transceiving unit 1501 and a processing unit 1502.
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, and so on.
  • the device for implementing the receiving function in the transceiving unit 1501 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiving unit 1501 can be regarded as the sending unit, that is, the transceiving unit 1501 includes a receiving unit and a sending unit,
  • the receiving unit may also be called a receiver, an input port, a receiving circuit, etc.
  • a sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the processor 1502 can be used to execute the instructions stored in the memory to control the transceiver unit 1501 to receive signals and/or send signals to complete the functions of the terminal equipment in the above method embodiments, which can specifically implement the functions of the processing module 1401 shown in FIG. 14. For specific functions, refer to the relevant description of the above-mentioned processing module 1401, which will not be repeated here.
  • the processor 1502 also includes an interface for realizing signal input/output functions.
  • the function of the transceiving unit 1501 may be implemented by a transceiving circuit or a dedicated chip for transceiving.
  • FIG. 16 is a schematic structural diagram of a network device provided by an embodiment of the present application, for example, it may be a schematic structural diagram of a base station.
  • the base station 160 may include one or more distributed units (DU) 1601 and one or more centralized units (CU) 1602.
  • the DU 1601 may include at least one antenna 16011, at least one radio frequency unit 16012, at least one processor 16016, and at least one memory 16014.
  • the DU 1601 part is mainly used for the transmission and reception of radio frequency signals, the conversion of radio frequency signals and baseband signals, and part of baseband processing.
  • the CU1602 may include at least one processor 16022 and at least one memory 16021.
  • CU1602 and DU1601 can communicate through interfaces, where the control plan interface can be Fs-C, such as F1-C, and the user plane (User Plan) interface can be Fs-U, such as F1-U.
  • control plan interface can be Fs-C, such as F1-C
  • user plane (User Plan) interface can be Fs-U, such as F1-U.
  • the CU 1602 part is mainly used for baseband processing, control of base stations, and so on.
  • the DU 1601 and CU 1602 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the CU 1602 is the control center of the base station, which may also be referred to as a processing unit, and is mainly used to complete baseband processing functions.
  • the CU 1602 may be used to control the base station to execute the operation procedures in the method embodiments described in FIGS. 4 to 13 above.
  • the baseband processing on the CU and DU can be divided according to the protocol layer of the wireless network.
  • the functions of the PDCP layer and the above protocol layers are set in the CU, and the protocol layers below the PDCP, such as the RLC layer and the MAC layer, are set in the DU.
  • the CU implements the functions of the RRC and PDCP layers
  • the DU implements the functions of the RLC, MAC, and physical (physical, PHY) layers.
  • the base station 160 may include one or more radio frequency units (RU), one or more DUs, and one or more CUs.
  • the DU may include at least one processor 16016 and at least one memory 16014
  • the RU may include at least one antenna 16011 and at least one radio frequency unit 16012
  • the CU may include at least one processor 16022 and at least one memory 16021.
  • the CU1602 can be composed of one or more single boards, and multiple single boards can jointly support a wireless access network (such as a 5G network) with a single access indication, or can respectively support wireless access networks of different access standards.
  • Access network (such as LTE network, 5G network or other networks).
  • the memory 16021 and the processor 16022 may serve one or more boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • the DU1601 can be composed of one or more single boards, and multiple single boards can jointly support a wireless access network with a single access indication (such as a 5G network), or can respectively support wireless access networks with different access standards (such as LTE network, 5G network or other network).
  • the memory 16014 and the processor 16016 may serve one or more boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • the embodiment of the present invention also provides a computer-readable storage medium for storing computer software instructions required to be executed to execute the foregoing processor, which contains a program required to execute the foregoing processor.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

L'invention concerne un procédé et un appareil de rétroaction HARQ, qui sont utilisés pour résoudre le problème d'échec de rétroaction HARQ dû au fait qu'une valeur de décalage de créneau temporel dans la communication de liaison latérale existante n'est pas appropriée pour certains scénarios. Ledit procédé consiste à déterminer une valeur de décalage temporel en fonction d'une configuration de ressource de domaine temporel d'une ressource de liaison latérale, la ressource de liaison latérale étant une ressource temps-fréquence d'une SCI, ou une ressource temps-fréquence comportant des informations HARQ, ou une ressource temps-fréquence comportant des données de liaison latérale. La valeur de décalage temporel fait référence à un intervalle de temps qui doit être satisfait entre la ressource temps-fréquence comportant des données de liaison latérale et la ressource temps-fréquence comportant des informations HARQ correspondant aux données de liaison latérale.
PCT/CN2019/111348 2019-10-15 2019-10-15 Procédé et appareil de rétroaction de demande de répétition automatique hybride WO2021072662A1 (fr)

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WO2024061072A1 (fr) * 2022-09-23 2024-03-28 华为技术有限公司 Procédé et appareil de communication
WO2024071974A1 (fr) * 2022-09-26 2024-04-04 엘지전자 주식회사 Procédé et dispositif permettant de réaliser une communication de liaison latérale dans une bande sans licence

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