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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 large transmission delay, inability to instruct PDSCH transmission, and increasing HARQ-ACK feedback transmission delay, etc.

Active Publication Date: 2021-02-09
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Currently, in 5G NR (the 5th Generation mobile communication technology-New Radio, the fifth generation mobile communication technology-new air interface), UE (User Equipment, terminal, also called user equipment) does not expect to schedule PUSCH (Physical Uplink Shared Channel, physical uplink shared channel) transmission of UL (uplink, uplink, or simply referred to as uplink) DCI (Downlink Control Information, downlink control information) transmitted after DL (downlink, downlink, can be referred to as downlink) DCI scheduling The HARQ-ACK corresponding to the PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) is multiplexed and transmitted on the PUSCH, that is, if there is a PUSCH scheduled by DCI, the HARQ-ACK corresponding to the PDSCH transmission scheduled after the DCI The PUCCH resources used for ACK feedback cannot conflict with the PUSCH resources. The problem is that for URLLC (Ultra-Reliable and Low Latency Communications, Ultra-Reliable and Low Latency Communications) UEs, the transmission delay of HARQ-ACK feedback may be increased.
like figure 1 As shown, the base station first schedules PUSCH transmission through a DCI. When the downlink URLLC data arrives, in order to transmit and receive feedback as soon as possible, the base station may indicate a PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) overlapping with the PUSCH during scheduling. ) resources are used to carry HARQ-ACK. If this kind of scheduling is not allowed, the base station needs to indicate a later PUCCH resource, which will bring a large transmission delay, and the URLLC service requires low delay, so it is necessary to relax this scheduling constraints
[0003] In summary, in the future, it may be possible to support the multiplexing transmission of HARQ-ACK corresponding to DL DCI transmitted after the UL DCI that schedules PUSCH transmission on PUSCH, but because the DAI (Downlink assignment index) contained in UL DCI cannot indicate The PDSCH transmission scheduled later, so how to determine the HARQ-ACK feedback codebook in this case has no specific plan

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

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Embodiment Construction

[0197]In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0198]Seefigure 2 ,figure 2 It is a schematic diagram of a network structure applicable to the embodiment of the present invention, such asfigure 2 As shown, it includes a terminal 21 and a network side device 22, where the terminal 21 may be a user terminal (User Equipment, UE) or other terminal equipment, such as a mobile phone, a tablet computer (Tablet Personal Computer), and a laptop computer (Laptop Computer). ), personal digital assistant (PDA), mobile Internet device (Mobile Internet Device, MID), or wearable device (Wearable Device) and other terminal-side devices. It should be noted that, in the embodiment of the present invention, it is not Limit the specific type of terminal. The network side device 22 may be a base station, such as...

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Abstract

The present invention provides a HARQ-ACK feedback method, a terminal and a network side device, and belongs to the technical field of communications, the method comprising: when HARQ-ACK of a PDSCH needs to be multiplexed and transmitted on a PUSCH scheduled by an uplink DCI, if the uplink DCI contains a DAI, determining an HARQ-ACK feedback codebook transmitted on the PUSCH on the basis of at least one of a judgment results that whether a PDSCH scheduled before the uplink DCI needs to multiplex and transmit HARQ-ACK on the PUSCH and the DAI, and the maximum number of PDSCHs which can be transmitted after the uplink DCI. The present invention is applicable to a scenario in which HARQACKs corresponding to PDSCHs scheduled by DL DCI transmitted after scheduling UL DCI transmitted by a PUSCHare multiplexed and transmitted on the PUSCH.

Description

Technical field[0001]The present invention relates to the field of communication technology, in particular to a HARQ-ACK (Hybrid Automatic Repeat request-Acknowledgement, hybrid automatic repeat request-response) feedback method, terminal and network side equipment.Background technique[0002]At present, in 5G NR (the 5th Generation mobile communication technology-New Radio, the fifth generation mobile communication technology-New Radio), UE (User Equipment, terminal, also called user equipment) does not expect to schedule PUSCH (Physical Uplink Shared Channel, physical uplink shared channel) UL (uplink, uplink, or simply referred to as uplink) DCI (Downlink Control Information, downlink control information) transmitted after the DL (downlink, downlink, can be referred to as downlink) DCI scheduling The HARQ-ACK corresponding to the PDSCH (Physical Downlink Shared Channel) is multiplexed and transmitted on the PUSCH, that is, if there is a PUSCH scheduled by DCI, the PDSCH scheduled a...

Claims

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Application Information

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IPC IPC(8): H04W72/12H04L1/16H04L1/18H04L5/00
CPCH04W72/121H04L1/1607H04L1/1812H04L5/0055H04W72/21H04L1/1854H04L1/1614H04L1/1664H04L1/1887H04L1/1896H04L5/001H04L5/0044H04L5/0053H04W72/0446H04W72/1273H04W72/20
Inventor 司倩倩高雪娟
Owner DATANG MOBILE COMM EQUIP CO LTD
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