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HARQ-ACK feedback method, terminal and network side equipment

A technology for network-side equipment and terminals, applied in the field of communication, can solve problems such as increasing feedback overhead, and achieve the effect of reducing overhead and reducing the number of bits

Active Publication Date: 2022-04-12
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In related technologies, the terminal feeds back HARQ-ACK for each PDSCH, and the terminal needs to feed back a large number of HARQ-ACK bits, which increases the feedback overhead

Method used

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  • HARQ-ACK feedback method, terminal and network side equipment
  • HARQ-ACK feedback method, terminal and network side equipment
  • HARQ-ACK feedback method, terminal and network side equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] In this embodiment, the terminal (UE) is configured with a semi-static codebook, which refers to a HARQ-ACK codebook generation method in which the size of the HARQ-ACK codebook does not change dynamically with the actual data scheduling situation. In this manner, the codebook size of the HARQ-ACK is determined according to parameters predefined in the protocol or configured in Radio Resource Control (RRC). The generation of the codebook mainly depends on: 1, the set of k1; 2, the row index set provided by PDSCH-TimeDomainResourceAllocation; 3, the uplink and downlink configuration parameters of the upper layer; 4, the number of cells configured by RRC; 5, HARQ space binding Parameters; 6, CBG parameters and the maximum number of codewords supported by each cell.

[0073] In this embodiment, the UE can construct a codebook according to the following parameters:

[0074] 1, the set of k1;

[0075] 2. The row index collection provided by PDSCH-TimeDomainResourceAllocati...

Embodiment 2

[0095] In this embodiment, the terminal (UE) is configured with a dynamic codebook. The dynamic codebook refers to a codebook generation method in which the size of the HARQ-ACK codebook changes dynamically according to the actual data scheduling situation. By counting the DAI of the actually scheduled PDSCH transmission / SPSPDSCH release indication, a feedback bit is reserved for each actually used Downlink Assignment Index (DAI) value, if the UE infers from other detected DAI Some PDSCH or SPS PDSCH release instructions corresponding to DAI have not been received, then set the corresponding feedback bit to NACK, otherwise, set the corresponding feedback bit according to the decoding result of the PDSCH transmission corresponding to each PDSCH allocation instruction, for the detected SPS PDSCH release indication, and its corresponding feedback bit is set as ACK.

[0096] In this embodiment, the DCI for scheduling the PDSCH includes DAI information, and the UE can determine th...

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PUM

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Abstract

The embodiment of the invention discloses an HARQ-ACK (Hybrid Automatic Repeat reQuest Acknowledgement) feedback method, a terminal and network side equipment, which can reduce the HARQ-ACK feedback overhead. The method comprises the following steps: a terminal groups a plurality of physical downlink shared channels (PDSCHs) to obtain one or more PDSCH groups; and the terminal feeds back the HARQ-ACK for each PDSCH (Physical Downlink Shared Channel) packet.

Description

technical field [0001] The present application belongs to the field of communication technologies, and in particular relates to a hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback method, a terminal and a network side device. Background technique [0002] In the 5G New Radio (New Radio, NR) system, the terminal is supported to perform HARQ-ACK feedback on the Physical Downlink Shared Channel (PDSCH). In related technologies, the terminal feeds back HARQ-ACK for each PDSCH, and the terminal needs to feed back a large number of HARQ-ACK bits, which increases feedback overhead. Contents of the invention [0003] Embodiments of the present application provide a HARQ-ACK feedback method, a terminal, and a network side device, which can reduce HARQ-ACK feedback overhead. [0004] In the first aspect, a HARQ-ACK feedback method is provided, the method includes: the terminal groups a plurality of physical downlink shared channels PDSCH to obtain one or more PDSCH...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L1/18
CPCH04L1/1614H04L1/1854H04L1/0003H04L1/0009H04L1/1896H04L5/0055H04L5/0044H04L1/0072H04L1/1861H04W72/232H04L1/1887H04W28/04H04W72/12
Inventor 洪琪曾超君
Owner VIVO MOBILE COMM CO LTD