Method and apparatus for transmitting and receiving feedback information in communication system

Patent metadata

Field	Value
Publication number	US-11985660-B2
Application number	US-202117495568-A
Country	US
Kind code	B2
Filing date	Oct 6, 2021
Priority date	Oct 8, 2020
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

An operation method of a terminal in a communication system may comprise: receiving, from a base station, a higher layer message including information indicating that first DCI including a HARQ feedback enabled/disabled indicator is configured; receiving the first DCI from the base station; receiving first downlink data from the base station based on first scheduling information included in the first DCI; and determining whether to transmit a first HARQ response for the first downlink data based on the HARQ feedback enabled/disabled indicator included in the first DCI.

First claim

What is claimed is:

1. An operation method of a terminal in a communication system, the operation method comprising:
receiving, from a base station, a higher layer message including information indicating that first downlink control information (DCI) including a hybrid automatic repeat request (HARQ) feedback enabled/disabled indicator is configured;
receiving the first DCI including the HARQ feedback enabled/disabled indicator and first scheduling information from the base station when the first DCI including the HARQ feedback enabled/disabled indicator is configured by the higher layer message;
receiving first downlink data from the base station based on the first scheduling information included in the first DCI; and
determining whether to transmit a first HARQ response for the first downlink data based on the HARQ feedback enabled/disabled indicator included in the first DCI,
wherein, when the first DCI including the HARQ feedback enabled/disabled indicator is not configured by the higher layer message, the first DCI does not include the HARQ feedback enabled/disabled indicator,
when the HARQ feedback enabled/disabled indicator indicates enabling of HARQ feedback, the first HARQ response is transmitted to the base station, and
when the HARQ feedback enabled/disabled indicator indicates disabling of the HARQ feedback, the first HARQ response is not transmitted to the base station.

2. The operation method according to claim 1 , wherein the higher layer message or the first DCI further includes information indicating a HARQ feedback scheme; when the HARQ feedback scheme is acknowledgement (ACK)/negative ACK (HACK) feedback scheme, the first HARQ response transmitted to the base station includes ACK or NACK; and when the HARQ feedback scheme is a NACK-only feedback scheme, the first HARQ response transmitted to the base station includes only NACK.

3. The operation method according to claim 1 , further comprising:
receiving second DCI from the base station;
receiving second downlink data from the base station based on second scheduling information included in the second DCI;
generating multiplexed HARQ responses by multiplexing the first HARQ response and a second HARQ response for the second downlink data; and
transmitting the multiplexed HARQ responses to the base station through a same slot,
wherein a first feedback resource indicated by the first DCI and a second feedback resource indicated by the second DCI are configured in the same slot.

4. The operation method according to claim 3 , wherein the multiplexed HARQ responses are a HARQ codebook, and arrangement of the multiplexed HARQ responses within the HARQ codebook is determined according to each type of the first downlink data and the second downlink data.

5. The operation method according to claim 1 , further comprising:
receiving second DCI from the base station;
receiving second downlink data from the base station based on second scheduling information included in the second DCI; and
when a first feedback resource indicated by the first DCI and a second feedback resource indicated by the second DCI are configured in a same slot, transmitting a HARQ response for one downlink data having a higher priority among the first downlink data and the second downlink data to the base station through the same slot.

6. The operation method according to claim 5 , wherein a priority of each of the first downlink data and the second downlink data varies according to a type of each downlink data, the type of each downlink data is classified into individual downlink data and common downlink data, the individual downlink data is downlink data transmitted to one terminal, and the common downlink data is downlink data transmitted to a plurality of terminals.

7. The operation method according to claim 1 , further comprising:
receiving second DCI from the base station;
receiving second downlink data from the base station based on second scheduling information included in the second DCI; and
transmitting, to the base station, at least one HARQ response among the first HARQ response and a second HARQ response for the second downlink data by using a HARQ feedback resource indicated by one DCI received later in a time domain among the first DCI and the second DCI.

8. The operation method according to claim 1 , wherein the first downlink data is individual downlink data transmitted to one terminal or common downlink data transmitted to a plurality of terminals, and priority information of the individual downlink data and priority information of the common downlink data are included in the higher layer message.

9. An operation method of a terminal in a communication system, the operation method comprising:
receiving, from a base station, a first higher layer message including information indicating that downlink control information (DCI) including a hybrid automatic repeat request (HARQ) feedback enabled/disabled indicator is not configured;
receiving, from the base station, a second higher layer message including information indicating whether to transmit a HARQ feedback;
receiving a first DCI without the HARQ feedback enabled/disabled indicator from the base station when the first DCI including the HARQ feedback enabled/disabled indicator is not configured by the first higher layer message;
receiving downlink data from the base station based on scheduling information included in the first DCI; and
determining whether to transmit a HARQ response for the downlink data based on the information included in the second higher layer message,
wherein, when the first DCI including the HARQ feedback enabled/disabled indicator is configured by the first higher layer message, the first DCI includes the HARQ feedback enabled/disabled indicator,
when the second higher layer message indicates transmission of the HARQ feedback, the HARQ response is transmitted, and
when the second higher layer message does not indicate transmission of the HARQ feedback, whether to transmit the HARQ response is determined based on a default configuration of the communication system.

10. The operation method according to claim 9 , wherein the first higher layer message, the second higher layer message, or the first DCI further includes information indicating a HARQ feedback scheme; when the HARQ feedback scheme is acknowledgement (ACK)/negative ACK (NACK) feedback scheme, the HARQ response transmitted to the base station includes ACK or NACK; and when the HARQ feedback scheme is a NACK-only feedback scheme, the HARQ response transmitted to the base station includes only NACK.

11. The operation method according to claim 9 , wherein when a HARQ feedback scheme of the HARQ response is not indicated by the base station, the HARQ response is transmitted based on a default HARQ feedback scheme, and the default HARQ feedback scheme is an ACK/NACK feedback scheme or a NACK-only feedback scheme.

12. The operation method according to claim 9 , wherein the first DCI further includes a physical uplink control channel (PUCCH) resource indicator (PRI) indicating a HARQ feedback resource, and the HARQ response is transmitted in the HARQ feedback resource indicated by the PRI.

13. An operation method of a base station in a communication system, the operation method comprising:
transmitting, to a terminal, a higher layer message including information indicating that first downlink control information (DCI) including a hybrid automatic repeat request (HARQ) feedback enabled/disabled indicator is configured;
transmitting the first DCI including the HARQ feedback enabled/disabled indicator and first scheduling information to the terminal when the firs

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Jung Hoi Yoon
• Park Sung Ik
• Hur Nam Ho
• Ahn Seok Ki
• Ahn Sung Jun

Classifications

• H04W72/1273 Primary

  of downlink data flows · CPC title

• H04L1/1819

  with retransmission of additional or different redundancy · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W72/0446

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

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title