HARQ feedback method, terminal and base station

Patent metadata

Field	Value
Publication number	US-12438651-B2
Application number	US-202117911140-A
Country	US
Kind code	B2
Filing date	Feb 3, 2021
Priority date	Mar 30, 2020
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

Provided in the embodiments of the present application are an HARQ feedback method, a terminal, and a base station. The method includes obtaining a target timeline parameter value for indicating a timing at which the terminal feeds back HARQ-ACK; a target timeline parameter sequence being predefined between the terminal and a base station, and the target timeline parameter sequence including multiple sequence index values and multiple timeline parameter values which have one-to-one correspondence; the timeline parameter value indicating slot intervals between a HARQ-ACK feedback slot and a last symbol of PDSCH, or the timeline parameter value indicating a slot where a PUCCH resource is located and the slot where the PUCCH resource is located corresponding to the HARQ-ACK feedback slot; and the target timeline parameter value being one of multiple timeline parameter values, and a time corresponding to the target timeline parameter value being equal to or greater than a time corresponding to a capability parameter value of PDSCH reception processing for UE; and feeding back the HARQ-ACK to the base station on the slot corresponding to the target timeline parameter value.

First claim

What is claimed is:

1. Hybrid Automatic Repeat Request (HARQ) feedback method, performed by a terminal, comprising:
obtaining a target timeline parameter value for indicating a timing at which the terminal feeds back HARQ-ACK; a target timeline parameter sequence being predefined between the terminal and a base station, and the target timeline parameter sequence comprising multiple sequence index values and multiple timeline parameter values which have one-to-one correspondence; the timeline parameter value indicating slot intervals between a HARQ-ACK feedback slot and a last symbol of Physical Downlink Shared Channel (PDSCH), or the timeline parameter value indicating a slot where a Physical Uplink Control Channel (PUCCH) resource is located and the slot where the PUCCH resource is located corresponding to the HARQ-ACK feedback slot; and the target timeline parameter value being one of multiple timeline parameter values, and a time corresponding to the target timeline parameter value being equal to or greater than a time corresponding to a capability parameter value of PDSCH reception processing for UE; and
feeding back the HARQ-ACK to the base station on the slot corresponding to the target timeline parameter value,
wherein the obtaining the target timeline parameter value for indicating the timing at which the terminal feeds back HARQ-ACK comprises:
receiving a second control signaling sent by the base station and obtaining a predefined target timeline parameter sequence, wherein the second control signaling carries a target sequence index value, the target sequence index value is one of the multiple sequence index values, a timeline parameter value corresponding to the target sequence index value is the target timeline parameter value, the timeline parameter value comprised in the target timeline parameter sequence is obtained from a product of a default parameter value in a first default timeline parameter sequence and a timeline offset factor, and the first default timeline parameter sequence is {1, 2, 3, 4, 5, 6, 7, 8}.

2. The method of claim 1 , wherein the obtaining the target timeline parameter value for indicating the timing at which the terminal feeds back HARQ-ACK comprises any one of the following steps of:
when the target timeline parameter sequence is a first default timeline parameter sequence or a second default timeline parameter sequence, receiving a first control signaling sent by the base station, wherein the first control signaling carries a first target sequence index value, the first target sequence index value is one of multiple sequence index values, and a timeline parameter value corresponding to the first target sequence index value is the target timeline parameter value; when the target timeline parameter sequence is the second default timeline parameter sequence, each timeline parameter value in the target timeline parameter sequence indicates the i-th slot with PUCCH resource after the terminal receives the PDSCH, and i is a corresponding timeline parameter value; and when the target timeline parameter sequence is the first default timeline parameter sequence, each timeline parameter value in the target timeline parameter sequence indicates the slot interval between the HARQ-ACK feedback slot and the last symbol of the PDSCH;
when the target timeline parameter sequence consists of the first default timeline parameter sequence and a timeline offset value, receiving a second control signaling sent by the base station and receiving a higher layer signaling sent by the base station, or receiving the second control signaling sent by the base station and obtaining the timeline offset value predefined by a protocol; wherein the second control signaling carries a second target sequence index value, and the higher layer signaling carries a timeline offset value; the second target sequence index value is one of multiple sequence index values, a sum of a target default parameter value corresponding to the second target sequence index value and the timeline offset value is the target timeline parameter value, and the target default parameter value is one of the first default timeline parameter sequence; and each timeline parameter value in the target timeline parameter sequence indicates slot intervals between the HARQ-ACK feedback slot and the last symbol of the PDSCH; and
when the target timeline parameter sequence consists of the first default timeline parameter sequence and a timeline offset factor, receiving a second control signaling sent by the base station and receiving a higher layer signaling sent by the base station, or receiving the second control signaling sent by the base station and obtaining the timeline offset factor predefined by a protocol; wherein the second control signaling carries a third target sequence index value and the high layer signaling carries a timeline offset factor; the third target sequence index value is one of multiple sequence index values, and a product of a target default parameter value corresponding to the third target sequence index value and the timeline offset factor is the target timeline parameter value, and the target default parameter value is one of the first default timeline parameter sequence; and each timeline parameter value in the target timeline parameter sequence indicates slot intervals between a HARQ-ACK feedback slot and the last symbol of the PDSCH.

3. The method of claim 1 , wherein before obtaining the target timeline parameter value for indicating the timing at which the terminal feeds back HARQ-ACK, the method further comprises:
reporting the capability parameter value of PDSCH reception processing for UE to the base station.

4. The method of claim 1 , wherein the capability parameter value of PDSCH reception processing for UE satisfies any one of the following:
a time duration corresponding to the capability parameter value of PDSCH reception processing for UE is the same as a preset first reference time duration, and the first reference time duration is a time duration corresponding to the capability parameter value of PDSCH reception processing corresponding to a reference Subcarrier Space (SCS) value;
the time duration corresponding to the capability parameter value of PDSCH reception processing for UE is the same as a second reference time duration being a difference between the first reference time duration and a preset time offset length; or
the capability parameter value of PDSCH reception processing for UE is associated with a target SCS value adopted by the PDSCH for UE.

5. The method of claim 4 , wherein when the time duration corresponding to the capability parameter value of PDSCH reception processing for UE is the same as the preset first reference time duration, the capability parameter value of PDSCH reception processing is 2 X times of the capability parameter value of PDSCH reception processing corresponding to the reference SCS value, and X denotes an integer equal to or greater than 0.

6. The method of claim 4 , wherein when the time duration corresponding to the capability parameter value of PDSCH reception processing for UE is the same as the second reference time duration, the capability parameter value of PDSCH reception processing is 2 X times of a target value being a difference between the capability parameter value of PDSCH reception processing corresponding to the reference SCS value and a preset time offset value, and X denotes an integer equal to or greater than 0.

7. The method of claim 4 , wherein when the time duration corresponding to the capability parameter value of PDSCH reception processing for UE is the same as the preset first reference time duration, the capability parameter value of PDSCH reception processing for UE is expressed by the following formula:

Assignees

• Datang mobile communications equipment co ltd

Inventors

• Wang Junwei
• Zhao Rui

Classifications

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04L5/0055 Primary

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04L1/1858

  Transmission or retransmission of more than one copy of acknowledgement message · CPC title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title