WO2020029702A1 - Pucch与pdsch之间的时间差的指示方法、基站及可读介质 - Google Patents

Pucch与pdsch之间的时间差的指示方法、基站及可读介质 Download PDF

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WO2020029702A1
WO2020029702A1 PCT/CN2019/093017 CN2019093017W WO2020029702A1 WO 2020029702 A1 WO2020029702 A1 WO 2020029702A1 CN 2019093017 W CN2019093017 W CN 2019093017W WO 2020029702 A1 WO2020029702 A1 WO 2020029702A1
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pdsch
harq
pucch
time difference
timing
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PCT/CN2019/093017
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English (en)
French (fr)
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周欢
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展讯通信（上海）有限公司
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Priority to US17/265,992 priority Critical patent/US20210204280A1/en
Priority to EP19848189.7A priority patent/EP3836445B1/en
Publication of WO2020029702A1 publication Critical patent/WO2020029702A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • 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
    • 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
    • H04L1/1607—Details of the supervisory signal
    • 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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload

Definitions

  • Embodiments of the present invention relate to the field of communications technologies, and in particular, to a method for indicating a time difference between a PUCCH and a PDSCH, a base station, and a readable medium.
  • the 3GPP standards organization supports the deployment of NR networks on unlicensed spectrum.
  • NR New Radio
  • the NR cell of the unlicensed spectrum is the main cell, and the user terminal (User Equipment, UE) directly accesses the NR cell of the unlicensed spectrum;
  • Long Term Evolution (LTE) cell accesses the NR cell of the unlicensed spectrum; 3.
  • the UE accesses the NR cell of the unlicensed spectrum through the NR cell.
  • LTE Long Term Evolution
  • the licensed spectrum and the unlicensed spectrum are combined in a manner similar to carrier aggregation, that is, a terminal and an evolved base station (Evolved NodeB, gNB) may work on both licensed and unlicensed spectrum. It is also called a new radio access unlicensed (NR-U) technology.
  • gNB evolved NodeB
  • NR-U new radio access unlicensed
  • the Physical Uplink Control Channel is a physical channel of the uplink in the NR system and is used to carry uplink control information (Uplink Control Information) (UCI).
  • UCI Uplink Control Information
  • the purpose of setting PUCCH is to use the PUCCH to transmit L1 / L2 control information when the UE is not scheduled, that is, when no uplink shared channel (UL-SCH) resources are allocated, including: channel status reports, such as precoding Matrix indication (Precoding, Matrix Indicator, PMI), channel quality indication (Channel, Quality Indicator, CQI), etc., HARQ ACK / NACK confirmation and Scheduling Request (SR).
  • Precoding Matrix indication
  • PMI Matrix Indicator
  • CQI Quality Indicator
  • SR Scheduling Request
  • PUCCH supports multiple transmission formats, including: PUCCH format 0, PUCCH format 1, PUCCH format 2, PUCCH format 3, and PUCCH format 4. Among them, the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied by PUCCH format 1, PUCCH format 3, and PUCCH format 4 format is large, which is called long PUCCH.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the PDSCH-to-HARQ-timing-indicator field in the DCI is used, which is the physical downlink shared channel Timing indication field to HARQ
  • the high-level signaling dl-DataToUL-ACK is configured with a value, this value is directly used as the HARQ-ACK feedback Gap deviation.
  • SPS Semi-Persistent Scheduling
  • preemption channels must be selected before transmission.
  • HARQ-ACK and PUCCH there are three transmission methods: 1. The corresponding HARQ-ACK information is fed back within the DL Channel Occupy Time (COT) of the PDSCH currently being sent; 2. The next DL COT is fed back to the previous COT. HARQ-ACK information of PDSCH; 3. Instruct the UE to access the channel by itself, and then send HARQ-ACK information after success.
  • COT Channel Occupy Time
  • the base station cannot predict when the current COT indicates the HARQ-ACK feedback time, so when scheduling the PDSCH in the previous COT, the time difference between the PDSCH and HARQ-ACK feedback (immediately) Gap deviation), so that the UE cannot accurately know the time slot of the feedback HARQ-ACK.
  • the technical problem solved by the embodiments of the present invention is how to enable the UE to accurately know the time slot of the feedback HARQ-ACK.
  • an embodiment of the present invention provides a method for indicating a time difference between a PUCCH and a PDSCH, including: determining whether a PDSCH-to-HARQ-timing-indicator field indicates a PDSCH and a PUCCH for feedback of HARQ-ACK. Time difference between the two; generating instruction information according to the instruction result; indicating the instruction information to the UE through downlink control information.
  • the indicating the indication information to the UE by using downlink control information includes: indicating the indication information to the UE by using one bit of the downlink control information, where a bit value of 0 indicates PDSCH-to-HARQ-timing-indicator This field indicates the time difference between the PDSCH and the PUCCH for HARQ-ACK feedback. A bit value of 1 indicates that the PDSCH-to-HARQ-timing-indicator field does not indicate the time difference between the PDSCH and the PUCCH for HARQ-ACK feedback.
  • the indicating the indication information to the UE by using the downlink control information includes: indicating the indication information to the UE by using an index value of a PDSCH-to-HARQ-timing-indicator field in the downlink control information.
  • the indicating the indication information to the UE through an index value of a PDSCH-to-HARQ-timing-indicator field in downlink control information includes: when the index value is I-1, indicating PDSCH-to-HARQ-timing
  • the -indicator field indicates the time difference between the PDSCH and the PUCCH for HARQ-ACK feedback; when the index value is M, it indicates that the PDSCH-to-HARQ-timing-indicator field does not indicate the PDSCH and the PUCCH for HARQ-ACK feedback.
  • Time difference between the two where I is the number of offset values between the reception time of the PDSCH indicated by the base station and the HARQ-ACK feedback time, and M is the highest value of the index value.
  • the index values I to M-1 are reserved bits.
  • An embodiment of the present invention provides a base station, including: a determining unit, adapted to determine whether a PDSCH-to-HARQ-timing-indicator field indicates a time difference between a PDSCH and a PUCCH for feedback HARQ-ACK; a generating unit, adapted to The instruction result generates instruction information; an instruction unit is adapted to indicate the instruction information to the UE through downlink control information.
  • the indication unit is adapted to indicate the indication information to the UE through one bit of downlink control information, where a bit value of 0 indicates the PDSCH-to-HARQ-timing-indicator field indicates that the PDSCH is used for feedback HARQ -The time difference between the PUCCHs of the ACK. A bit value of 1 indicates that the PDSCH-to-HARQ-timing-indicator field does not indicate the time difference between the PDSCH and the PUCCH used for feedback HARQ-ACK.
  • the indication unit is adapted to indicate the indication information to the UE by using an index value of a PDSCH-to-HARQ-timing-indicator field in downlink control information.
  • the indication unit is adapted to indicate that when the index value is I-1, the PDSCH-to-HARQ-timing-indicator field indicates the time difference between the PDSCH and the PUCCH used for HARQ-ACK feedback; when the index value is When M, it indicates that the PDSCH-to-HARQ-timing-indicator field does not indicate the time difference between the PDSCH and the PUCCH for HARQ-ACK feedback; where I is the time between the PDSCH reception time indicated by the base station and the HARQ-ACK feedback time
  • M is the highest value of the index value.
  • the index values I to M-1 are reserved bits.
  • An embodiment of the present invention provides a computer-readable storage medium.
  • the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and computer instructions are stored thereon. When the computer instructions are executed, any one of the foregoing is executed. Steps of the method.
  • An embodiment of the present invention provides a base station, including a memory and a processor.
  • the memory stores computer instructions that can run on the processor, and the processor executes any one of the foregoing when the computer instructions are run. Method steps.
  • the PDSCH-to-HARQ-timing-indicator field indicates the time difference between the PDSCH and the PUCCH for HARQ-ACK feedback, and then generates indication information according to the indication result, and indicates to the UE through downlink control information.
  • the indication information can enable the UE to accurately know the time slot of the feedback HARQ-ACK when the PDSCH-to-HARQ-timing-indicator field indicates the time difference between the PDSCH and the PUCCH for feedback of the HARQ-ACK.
  • FIG. 1 is a flowchart of a method for indicating a time difference between a PUCCH and a PDSCH according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station due to the time of the next DL COT, the base station cannot predict when the current COT indicates the HARQ-ACK feedback time, so the PDSCH and HARQ-ACK feedback cannot be explicitly indicated when scheduling the PDSCH in the previous COT.
  • Time difference ie, time slot deviation
  • the UE cannot accurately know the time slot of the feedback HARQ-ACK.
  • the PDSCH-to-HARQ-timing-indicator field indicates the time difference between the PDSCH and the PUCCH for HARQ-ACK feedback, and then generates indication information according to the indication result, and indicates to the UE through downlink control information.
  • the indication information can enable the UE to accurately know the time slot of the feedback HARQ-ACK when the PDSCH-to-HARQ-timing-indicator field indicates the time difference between the PDSCH and the PUCCH for feedback of the HARQ-ACK.
  • an embodiment of the present invention provides a method for indicating a time difference between a PUCCH and a PDSCH, which may include the following steps:
  • step S101 it is determined whether the PDSCH-to-HARQ-timing-indicator field indicates a time difference between the PDSCH and the PUCCH used for HARQ-ACK feedback.
  • the base station cannot predict the next DL when the current COT indicates the HARQ-ACK feedback time.
  • the time of COT so when scheduling the PDSCH in the previous COT, the time difference between the PDSCH and HARQ-ACK feedback (that is, the time slot deviation) cannot be clearly indicated, resulting in that the UE cannot accurately know the time slot of the feedback HARQ-ACK. Therefore, the embodiment of the present invention considers to pass
  • the downlink control information clearly indicates the time difference between the PDSCH and the PUCCH for HARQ-ACK feedback.
  • Step S102 Generate instruction information according to the instruction result.
  • the indication result may include: a PDSCH-to-HARQ-timing-indicator field indicating a time difference between the PDSCH and a PUCCH for feedback HARQ-ACK (PDSCH-to-HARQ-timing), PDSCH-to The -HARQ-timing-indicator field does not indicate the time difference (PDSCH-to-HARQ-timing) between the PDSCH and the PUCCH for HARQ-ACK feedback.
  • the PDSCH-to-HARQ-timing-indicator field indicates the PDSCH-to-HARQ-timing
  • the PDSCH when the -to-HARQ-timing-indicator field does not indicate the PDSCH-to-HARQ-timing, it means that the PDSCH-to-HARQ-timing-indicator field does not indicate a certain PUSCH-to-HARQ-timing, and you need to wait for the next clear Indicate the information and use the determined PUCCH that is clearly indicated next.
  • Step S103 Indicate the indication information to the UE through downlink control information.
  • the indication information may be indicated to the UE through one bit of the downlink control information, where a bit value of 0 indicates that the PDSCH-to-HARQ-timing-indicator field indicates the PDSCH and the PUCCH used to feedback the HARQ-ACK.
  • the time difference between the two, a bit value of 1 indicates that the PDSCH-to-HARQ-timing-indicator field does not indicate the time difference between the PDSCH and the PUCCH used for HARQ-ACK feedback.
  • the PDSCH-to-HARQ-timing-indicator field can also be indicated by a bit value of 1 to indicate the time difference between the PDSCH and the PUCCH for HARQ-ACK feedback.
  • a bit value of 0 indicates the PDSCH-to-HARQ-
  • the timing-indicator field does not indicate the time difference between the PDSCH and the PUCCH used for HARQ-ACK feedback, which all belong to the protection scope of the embodiment of the present invention.
  • the indication information may also be indicated to the UE through an index value of a PDSCH-to-HARQ-timing-indicator field in the downlink control information.
  • the indicating the indication information to the UE by using an index value of a PDSCH-to-HARQ-timing-indicator field in downlink control information includes: when the index value is I-1, indicating the PDSCH-to -The HARQ-timing-indicator field indicates the time difference between the PDSCH and the PUCCH for HARQ-ACK feedback, that is, the PDSCH-to-HARQ-timing-indicator field indicates the true PUSCH-to-HARQ-timing; when the index value is M Indicates that the PDSCH-to-HARQ-timing-indicator field does not indicate the time difference between the PDSCH and the PUCCH used for HARQ-ACK feedback; I is the deviation between the PDSCH reception time indicated by the base station and the HARQ-ACK feedback time
  • the number of setting values that is, the number of dl-DataToUL-ACK configuration values indicated by the base station
  • M is the highest value (Max Value) of the index
  • the base station may indicate the number of offset values between the reception time of the PDSCH and the HARQ-ACK feedback time to the UE through high-level signaling.
  • index values I to M-1 are reserved bits.
  • the UE may indicate the PDSCH and the PUCCH used for feedback HARQ-ACK in the PDSCH-to-HARQ-timing-indicator field based on the indication information.
  • the UE may indicate the PDSCH and the PUCCH used for feedback HARQ-ACK in the PDSCH-to-HARQ-timing-indicator field based on the indication information.
  • the indication information can enable the UE to accurately know the time slot of the feedback HARQ-ACK when the PDSCH-to-HARQ-timing-indicator field indicates the time difference between the PDSCH and the PUCCH for feedback of the HARQ-ACK.
  • an embodiment of the present invention further provides a base station capable of implementing the foregoing method, as shown in FIG. 2.
  • the base station 20 may include: a determining unit 21, a generating unit 22, and an instructing unit 23, where:
  • the determining unit 21 is adapted to determine whether a PDSCH-to-HARQ-timing-indicator field indicates a time difference between the PDSCH and a PUCCH for feedback HARQ-ACK.
  • the generating unit 22 is adapted to generate instruction information according to an instruction result.
  • the indication unit 23 is adapted to indicate the indication information to the UE through downlink control information.
  • the indication unit 23 is adapted to indicate the indication information to the UE through one bit of the downlink control information, where a bit value of 0 indicates that the PDSCH-to-HARQ-timing-indicator field indicates the PDSCH The time difference with the PUCCH for feedback HARQ-ACK. A bit value of 1 indicates that the PDSCH-to-HARQ-timing-indicator field does not indicate the time difference between the PDSCH and the PUCCH for feedback HARQ-ACK.
  • the indication unit 23 is adapted to indicate the indication information to the UE through an index value of a PDSCH-to-HARQ-timing-indicator field in downlink control information.
  • the indicating unit 23 is adapted to indicate that the PDSCH-to-HARQ-timing-indicator field indicates the time difference between the PDSCH and the PUCCH used for HARQ-ACK feedback when the index value is I-1;
  • the index value is M, it indicates that the PDSCH-to-HARQ-timing-indicator field does not indicate the time difference between the PDSCH and the PUCCH for HARQ-ACK feedback;
  • I is the feedback of the PDSCH reception time indicated by the base station and the HARQ-ACK feedback
  • M is the highest value of the index value.
  • the index values I to M-1 are reserved bits.
  • An embodiment of the present invention provides a computer-readable storage medium.
  • the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and computer instructions are stored thereon. When the computer instructions are executed, any one of the foregoing is executed. The steps corresponding to the method are not repeated here.
  • An embodiment of the present invention provides a base station, including a memory and a processor.
  • the memory stores computer instructions capable of running on the processor, and the processor executes any one of the foregoing when the computer instructions are run. The steps corresponding to the method are not repeated here.
  • the program may be stored in a computer-readable storage medium.
  • the storage medium may include: ROM, RAM, disk or optical disc, etc.

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Abstract

一种PUCCH与PDSCH之间的时间差的指示方法、基站及可读介质，所述PUCCH与PDSCH之间的时间差的指示方法包括：确定PDSCH-to-HARQ-timing-indicator字段是否指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；根据指示结果，生成指示信息；通过下行控制信息向UE指示所述指示信息。应用上述方案，可以使得UE在基于PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差时，准确获知反馈HARQ-ACK的时隙。

Description

PUCCH与PDSCH之间的时间差的指示方法、基站及可读介质
本申请要求于2018年08月08日提交中国专利局、申请号为201810899698.3、发明名称为“PUCCH与PDSCH之间的时间差的指示方法、基站及可读介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及通信技术领域，尤其涉及一种PUCCH与PDSCH之间的时间差的指示方法、基站及可读介质。
背景技术
为了公平有效地利用非授权频谱，提高新无线(New Radio，NR)系统的数据传输速率，3GPP标准组织支持在非授权频谱上部署NR网络。NR网络对非授权频谱的使用有三种方式：1、非授权频谱的NR小区为主小区，用户终端(User Equipment，UE)直接接入非授权频谱的NR小区；2、UE通过长期演进系统(Long Term Evolution，LTE)小区接入非授权频谱的NR小区；3、UE通过NR小区接入非授权频谱的NR小区。对于方式2和方式3，授权频谱和非授权频谱通过类似于载波聚合的方式结合使用，即一个终端、演进型基站(Evolved Node B，gNB)可能同时工作在授权频谱和非授权频谱上。也称为新的无线接入非授权(new RAT unlicensed，NR-U)技术。
物理上行链路控制信道(Physical Uplink Control Channel，PUCCH)为NR系统中上行链路的一个物理信道，用于承载上行控制信息(Uplink Control Information，UCI)。设置PUCCH的目的是当 UE未被调度时，即没有被分配上行共享信道(Uplink Shared Channel，UL-SCH)资源时，利用PUCCH传递L1/L2的控制信息，包括：信道状态报告，例如预编码矩阵指示(Precoding Matrix Indicator，PMI)和信道质量指示(Channel Quality Indicator，CQI)等等，HARQ ACK/NACK确认和调度请求(Scheduling Request，SR)。PUCCH支持多种传输格式，包括：PUCCH格式0、PUCCH格式1、PUCCH格式2、PUCCH格式3和PUCCH格式4。其中PUCCH格式1、PUCCH格式3和PUCCH格式4format占的正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号的个数较多，称为长PUCCH。
对于有DCI调度PDSCH的HARQ-ACK反馈所处时隙，若高层信令dl-DataToUL-ACK配置多个值，则通过DCI中的PDSCH-to-HARQ-timing-indicator字段，即物理下行共享信道到HARQ的定时指示字段)指示UE收到PDSCH到发送PUCCH反馈HARQ-ACK的时隙间隔；若高层信令dl-DataToUL-ACK配置一个值，则直接采用此值做为HARQ-ACK反馈的时隙偏差。对于没有DCI调度的PDSCH，例如半静态调度(Semi-Persistent Scheduling，SPS)PDSCH，其对应的HARQ-ACK反馈时隙通过高层信令指示。
在NR-U系统中，由于发送所有上行信道下行信道之前，必须选抢占信道，才可以发送。对于HARQ-ACK PUCCH，有三种发送方式：1、在当前发送PDSCH的DL信道占用时间(Channel Occupy Time，COT)内反馈对应的HARQ-ACK信息；2、在下一个DL COT内反馈上一个COT内PDSCH的HARQ-ACK信息；3、指示UE自行接入信道，成功后再发送HARQ-ACK信息。对于第三种方式，由于下一个DL COT的时间，基站无法在当前COT指示HARQ-ACK反馈时间时预知，所以在上一个COT内调度PDSCH时无法明确指示PDSCH与HARQ-ACK反馈的时间差(即时隙偏差)，导致UE无法准确获知反馈HARQ-ACK的时隙。
发明内容
本发明实施例解决的技术问题是如何使得UE可以准确获知反馈HARQ-ACK的时隙。
为解决上述技术问题，本发明实施例提供一种PUCCH与PDSCH之间的时间差的指示方法，包括：确定PDSCH-to-HARQ-timing-indicator字段是否指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；根据指示结果，生成指示信息；通过下行控制信息向UE指示所述指示信息。
可选地，所述通过下行控制信息向UE指示所述指示信息包括：通过下行控制信息的1个比特向UE指示所述指示信息，其中比特值为0表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，比特值为1表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差。
可选地，所述通过下行控制信息向UE指示所述指示信息包括：通过下行控制信息中PDSCH-to-HARQ-timing-indicator字段的索引值向UE指示所述指示信息。
可选地，所述通过下行控制信息中PDSCH-to-HARQ-timing-indicator字段的索引值向UE指示所述指示信息包括：当索引值为I-1时，表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；当索引值为M时，表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；其中I为基站指示的PDSCH的接收时间与HARQ-ACK的反馈时间之间的偏置值的个数，，M为索引值的最高值。
可选地，当I小于M时，索引值I～M-1为预留位。
本发明实施例提供一种基站，包括：确定单元，适于确定 PDSCH-to-HARQ-timing-indicator字段是否指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；生成单元，适于根据指示结果，生成指示信息；指示单元，适于通过下行控制信息向UE指示所述指示信息。
可选地，所述指示单元，适于通过下行控制信息的1个比特向UE指示所述指示信息，其中比特值为0表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，比特值为1表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差。
可选地，所述指示单元，适于通过下行控制信息中PDSCH-to-HARQ-timing-indicator字段的索引值向UE指示所述指示信息。
可选地，所述指示单元，适于当索引值为I-1时，表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；当索引值为M时，表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；其中I为基站指示的PDSCH的接收时间与HARQ-ACK的反馈时间之间的偏置值的个数，，M为索引值的最高值。
可选地，当I小于M时，索引值I～M-1为预留位。
本发明实施例提供一种计算机可读存储介质，计算机可读存储介质为非易失性存储介质或非瞬态存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述任一种所述方法的步骤。
本发明实施例提供一种基站，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行上述任一种所述方法的步骤。
与现有技术相比，本发明实施例的技术方案具有以下有益效果：
本发明实施例通过确定PDSCH-to-HARQ-timing-indicator字段是否指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，然后根据指示结果，生成指示信息，并通过下行控制信息向UE指示该指示信息，可以使得UE在基于PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差时，准确获知反馈HARQ-ACK的时隙。
附图说明
图1是本发明实施例提供的一种PUCCH与PDSCH之间的时间差的指示方法的流程图；
图2是本发明实施例提供的一种基站的结构示意图。
具体实施方式
在现有的NR-U系统中，由于下一个DL COT的时间，基站无法在当前COT指示HARQ-ACK反馈时间时预知，所以在上一个COT内调度PDSCH时无法明确指示PDSCH与HARQ-ACK反馈的时间差(即时隙偏差)，导致UE无法准确获知反馈HARQ-ACK的时隙。
本发明实施例通过确定PDSCH-to-HARQ-timing-indicator字段是否指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，然后根据指示结果，生成指示信息，并通过下行控制信息向UE指示该指示信息，可以使得UE在基于PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差时，准确获知反馈HARQ-ACK的时隙。
为使本发明的上述目的、特征和有益效果能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。
参见图1，本发明实施例提供了一种一种PUCCH与PDSCH之间的时间差的指示方法，可以包括如下步骤：
步骤S101，确定PDSCH-to-HARQ-timing-indicator字段是否指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差。
在具体实施中，对于HARQ-ACK PUCCH的第三种发送方式，即指示UE自行接入信道，成功后再发送HARQ-ACK信息，基站无法在当前COT指示HARQ-ACK反馈时间时预知下一个DL COT的时间，所以在上一个COT内调度PDSCH时无法明确指示PDSCH与HARQ-ACK反馈的时间差(即时隙偏差)，导致UE无法准确获知反馈HARQ-ACK的时隙，故本发明实施例考虑通过下行控制信息明确指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差。
步骤S102，根据指示结果，生成指示信息。
在具体实施中，所述指示结果可以包括：PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差(PDSCH-to-HARQ-timing)、PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差(PDSCH-to-HARQ-timing)。
在具体实施中，当PDSCH-to-HARQ-timing-indicator字段指示PDSCH-to-HARQ-timing时，说明PDSCH-to-HARQ-timing-indicator字段指示真实的PUSCH-to-HARQ-timing；当PDSCH-to-HARQ-timing-indicator字段不指示PDSCH-to-HARQ-timing时，说明PDSCH-to-HARQ-timing-indicator字段指示的不是确定的PUSCH-to-HARQ-timing，需要等待下一次明确的指示信息，并使用下一个明确指示的确定的PUCCH。
步骤S103，通过下行控制信息向UE指示所述指示信息。
在具体实施中，可以通过下行控制信息的1个比特向UE指示所述指示信息，其中比特值为0表示PDSCH-to-HARQ-timing-indicator 字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，比特值为1表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差。
可以理解的是，也可以通过比特值为1表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，比特值为0表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，均属于本发明实施例的保护范围。
在具体实施中，还可以通过下行控制信息中PDSCH-to-HARQ-timing-indicator字段的索引值向UE指示所述指示信息。
在本发明一实施例中，所述通过下行控制信息中PDSCH-to-HARQ-timing-indicator字段的索引值向UE指示所述指示信息包括：当索引值为I-1时，表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，即PDSCH-to-HARQ-timing-indicator字段指示真实的PUSCH-to-HARQ-timing；当索引值为M时，表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；I为基站指示的PDSCH的接收时间与HARQ-ACK的反馈时间之间的偏置值的个数(即基站指示的dl-DataToUL-ACK配置值的个数)，M为索引值的最高值(Max Value)。
在具体实施中，基站可以通过高层信令向UE指示PDSCH的接收时间与HARQ-ACK的反馈时间之间的偏置值的个数。
在具体实施中，当I不等于M，例如，当I小于M时，索引值I～M-1为预留位。
在具体实施中，当基站通过下行控制信息向UE指示所述指示信息后，UE可以基于所述指示信息，在PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差时，准确获知反馈HARQ-ACK的时隙，进行HARQ-ACK的反馈；在PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差时，不进行HARQ-ACK的反馈，等待下一次明确的指示信息。
在具体实施中，HARQ-ACK反馈的具体实现方案可以参见现有的技术方案，本发明实施例不做赘述。
应用上述方案，通过确定PDSCH-to-HARQ-timing-indicator字段是否指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，然后根据指示结果，生成指示信息，并通过下行控制信息向UE指示该指示信息，可以使得UE在基于PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差时，准确获知反馈HARQ-ACK的时隙。
为使本领域技术人员更好的理解和实施本发明，本发明实施例还提供了一种能够实现上述方法的基站，如图2所示。
参见图2，所述基站20可以包括：确定单元21、生成单元22和指示单元23，其中：
所述确定单元21，适于确定PDSCH-to-HARQ-timing-indicator字段是否指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差。
所述生成单元22，适于根据指示结果，生成指示信息。
所述指示单元23，适于通过下行控制信息向UE指示所述指示信息。
在本发明一实施例中，所述指示单元23，适于通过下行控制信 息的1个比特向UE指示所述指示信息，其中比特值为0表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，比特值为1表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差。
在本发明一实施例中，所述指示单元23，适于通过下行控制信息中PDSCH-to-HARQ-timing-indicator字段的索引值向UE指示所述指示信息。
在具体实施中，所述指示单元23，适于当索引值为I-1时，表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；当索引值为M时，表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；其中I为基站指示的PDSCH的接收时间与HARQ-ACK的反馈时间之间的偏置值的个数，M为索引值的最高值。
在本发明一实施例中，当I小于M时，索引值I～M-1为预留位。
在具体实施中，所述基站20的工作流程及原理可以参考上述实施例中提供的方法中的描述，此处不再赘述。
本发明实施例提供一种计算机可读存储介质，计算机可读存储介质为非易失性存储介质或非瞬态存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述任一种所述方法对应的步骤，此处不再赘述。
本发明实施例提供一种基站，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行上述任一种所述方法对应的步骤，此处不再赘述。
本领域普通技术人员可以理解上述实施例的各种方法中的全部 或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读存储介质中，存储介质可以包括：ROM、RAM、磁盘或光盘等。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (12)

  1. 一种PUCCH与PDSCH之间的时间差的指示方法，其特征在于，包括：
    确定PDSCH-to-HARQ-timing-indicator字段是否指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；
    根据指示结果，生成指示信息；
    通过下行控制信息向UE指示所述指示信息。
  2. 根据权利要求1所述的PUCCH与PDSCH之间的时间差的指示方法，其特征在于，所述通过下行控制信息向UE指示所述指示信息包括：
    通过下行控制信息的1个比特向UE指示所述指示信息，其中比特值为0表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，比特值为1表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差。
  3. 根据权利要求1所述的PUCCH与PDSCH之间的时间差的指示方法，其特征在于，所述通过下行控制信息向UE指示所述指示信息包括：
    通过下行控制信息中PDSCH-to-HARQ-timing-indicator字段的索引值向UE指示所述指示信息。
  4. 根据权利要求3所述的PUCCH与PDSCH之间的时间差的指示方法，其特征在于，所述通过下行控制信息中PDSCH-to-HARQ-timing-indicator字段的索引值向UE指示所述指示信息包括：
    当索引值为I-1时，表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；
    当索引值为M时，表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；
    其中I为基站指示的PDSCH的接收时间与HARQ-ACK的反馈时间之间的偏置值的个数，
    M为索引值的最高值。
  5. 根据权利要求4所述的PUCCH与PDSCH之间的时间差的指示方法，其特征在于，当I小于M时，索引值I～M-1为预留位。
  6. 一种基站，其特征在于，包括：
    确定单元，适于确定PDSCH-to-HARQ-timing-indicator字段是否指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；
    生成单元，适于根据指示结果，生成指示信息；
    指示单元，适于通过下行控制信息向UE指示所述指示信息。
  7. 根据权利要求6所述的基站，其特征在于，所述指示单元，适于通过下行控制信息的1个比特向UE指示所述指示信息，其中比特值为0表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差，比特值为1表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差。
  8. 根据权利要求6所述的基站，其特征在于，所述指示单元，适于通过下行控制信息中PDSCH-to-HARQ-timing-indicator字段的索引值向UE指示所述指示信息。
  9. 根据权利要求8所述的基站，其特征在于，所述指示单元，适于当索引值为I-1时，表示PDSCH-to-HARQ-timing-indicator字段指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；当索引值为M时，表示PDSCH-to-HARQ-timing-indicator字段不指示PDSCH与用于反馈HARQ-ACK的PUCCH之间的时间差；其 中I为基站指示的PDSCH的接收时间与HARQ-ACK的反馈时间之间的偏置值的个数，M为索引值的最高值。
  10. 根据权利要求9所述的基站，其特征在于，当I小于M时，索引值I～M-1为预留位。
  11. 一种计算机可读存储介质，计算机可读存储介质为非易失性存储介质或非瞬态存储介质，其上存储有计算机指令，其特征在于，所述计算机指令运行时执行权利要求1至5中任一项所述方法的步骤。
  12. 一种基站，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机指令，其特征在于，所述处理器运行所述计算机指令时执行权利要求1至5中任一项所述方法的步骤。
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