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A kind of harq feedback method and device of pdsch repeated transmission

A technology for repeated transmission and feedback information, which is applied in the field of HARQ feedback methods and devices, can solve the problems of not being able to transmit PDSCH, achieve the effect of reducing size and improving transmission performance

Active Publication Date: 2022-04-05
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] For PDSCH repeated transmission, when the last slot in the N PDSCH transmission slots is an uplink slot or part of the Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied by the PDSCH is an uplink symbol, but the preceding N -When there is available downlink transmission in 1 time slot, the last time slot in the N PDSCH transmission time slots is still counted in the semi-static feedback codebook, but in fact this time slot cannot actually transmit PDSCH, so in HARQ - There are redundant information bits in the ACK codebook

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  • A kind of harq feedback method and device of pdsch repeated transmission
  • A kind of harq feedback method and device of pdsch repeated transmission
  • A kind of harq feedback method and device of pdsch repeated transmission

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Embodiment Construction

[0044] Embodiments of the present application provide a HARQ feedback method and device for repeated PDSCH transmission.

[0045] The embodiments of the present application may be applied to a 5G system or its evolution system. Unless otherwise stated, the embodiment of this application uses the 5G system as an example to describe.

[0046] In order to understand the embodiment of the present application more clearly, the content related to the embodiment of the present application in the 5G system is firstly introduced in four aspects.

[0047] (1) The first aspect, scheduling and feedback timing in NR

[0048] 5G NR systems support flexible timing relationships. For PDSCH, the PDCCH carrying its scheduling information indicates the scheduling timing relationship (Scheduling timing) between PDSCH and PDCCH and the feedback timing relationship (HARQ-ACK timing) between PDSCH and its corresponding HARQ-ACK.

[0049] Specifically, the time domain resource allocation indicatio...

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Abstract

The present application discloses a HARQ feedback method and device for PDSCH repeated transmission. A HARQ feedback method and device for PDSCH repeated transmission. The method includes: the terminal determines the last PDSCH transmission time slot that does not conflict with the semi-static uplink and downlink configuration in the repeated PDSCH transmission; the terminal determines the PDSCH transmission time slot according to the last PDSCH transmission time slot that does not conflict with the semi-static uplink and downlink configuration HARQ feedback position and feedback codebook. The application can reduce the size of the semi-static feedback codebook, thereby improving the transmission performance of the system.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a HARQ feedback method and device for PDSCH repeated transmission. Background technique [0002] At present, in 5G, the Physical Downlink Shared CHannel (PDSCH) can support repeated transmission in N time slots (N can be 2, 4 or 8), and supports hybrid automatic retransmission based on HARQ-ACK codebook Request (Hybrid Automatic Repeat reQuest, HARQ) feedback. [0003] The HARQ-ACK codebook (HARQ-ACK codebook) is a HARQ-ACK feedback sequence generated for PDSCH downlink transmission, and is divided into a semi-static codebook (Semi-static codebook) and a dynamic codebook (dynamic codebook). The downlink transmission may include PDSCH transmission and physical downlink control channel (Physical Downlink Control Channel, PDCCH) transmission indicating release of downlink Semi-Persistent Scheduling (Semi-Persistent Scheduling, SRS) resources. When the PDSCH ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L5/00
CPCH04L1/1806H04L1/1812H04L1/1851H04L5/0055H04L5/0057H04L5/0005
Inventor 司倩倩高雪娟
Owner DATANG MOBILE COMM EQUIP CO LTD
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