Method and apparatus for sending harq-ack feedback codebook and device

Patent metadata

Field	Value
Publication number	US-11245496-B2
Application number	US-202016815393-A
Country	US
Kind code	B2
Filing date	Mar 11, 2020
Priority date	Oct 9, 2017
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

This application provides methods and apparatuses for sending a HARQ-ACK feedback codebook. One example method includes detecting DCI in a plurality of time units corresponding to at least one carrier, where a type of the DCI is a first DCI type or a second DCI type, where the first DCI is used to indicate to feed back CBG-level HARQ-ACK information for data scheduled by the first DCI, and where the second DCI is used to indicate to feed back TB-level HARQ-ACK information for data scheduled by the second DCI. A HARQ-ACK feedback codebook is then sent to a network device, where the codebook includes HARQ-ACK information of at least one piece of data scheduled by the DCI, and the HARQ-ACK feedback codebook is determined according to the type of the DCI and a type of the HARQ-ACK feedback codebook.

First claim

What is claimed is:

1. A method for sending a hybrid automatic repeat request-acknowledgment (HARQ-ACK) feedback codebook, comprising:
detecting, by a terminal, downlink control information (DCI) in a plurality of time units corresponding to at least one carrier, wherein a type of the DCI is a first DCI type or a second DCI type, wherein the first DCI type is used to indicate to feed back code block group (CBG)-level HARQ-ACK information for data scheduled by using the first DCI type, and wherein the second DCI type is used to indicate to feed back transport block (TB)-level HARQ-ACK information for data scheduled by using the second DCI type;
determining, by the terminal, a size of a HARQ-ACK feedback codebook, wherein N is a maximum quantity of CBGs configured by a network device for particular data, wherein M is a quantity of CBGs actually comprised in the particular data, and wherein:
if the determined size of the HARQ-ACK feedback codebook is less than a preset threshold, a first bit in N bits in the HARQ-ACK feedback codebook that correspond to the particular data is TB-level HARQ-ACK information of the particular data; or
if the determined size of the HARQ-ACK feedback codebook is greater than or equal to a preset threshold, first M bits in N bits that are in the HARQ-ACK feedback codebook and that correspond to the particular data are CBG-level HARQ-ACK information of the particular data; and

sending, by the terminal, the HARQ-ACK feedback codebook to the network device, wherein the HARQ-ACK feedback codebook comprises HARQ-ACK information of at least one piece of data scheduled by using the DCI, wherein the HARQ-ACK feedback codebook is determined according to the type of the DCI and a type of the HARQ-ACK feedback codebook, and wherein the type of the HARQ-ACK feedback codebook is a semi-persistent type or a dynamic type.

2. The method according to claim 1 , wherein if first data is scheduled according to the first DCI type, first M1 bits in N1 bits that are in the HARQ-ACK feedback codebook and that correspond to the first data are code block group (CBG)-level HARQ-ACK information of the first data, and wherein the following (N1−M1) bits in the N1 bits are negative acknowledgments (NACKs), wherein N1 is a maximum quantity of CBGs configured by the network device for the first data, and wherein M1 is a quantity of CBGs actually comprised in the first data; and
if second data is scheduled according to the second DCI type, the first bit in N2 bits in the HARQ-ACK feedback codebook that correspond to the second data is TB-level HARQ-ACK information of the second data, and wherein each of the following (N2−1) bits in the N2 bits is a NACK or TB-level HARQ-ACK information, wherein N2 is a maximum quantity of CBGs configured by the network device for the second data, and
wherein the first data is any data that is in the at least one piece of data and that is scheduled according to the first DCI type, and wherein the second data is any data that is in the at least one piece of data and that is scheduled according to the second DCI type.

3. The method according to claim 1 , wherein all HARQ-ACK information comprised in the HARQ-ACK feedback codebook is CBG-level HARQ-ACK information.

4. The method according to claim 1 , wherein:
if the determined size of the HARQ-ACK feedback codebook is less than the preset threshold, each of (N−1) bits following the first bit in the N bits is a negative acknowledgments (NACK) or TB-level HARQ-ACK information; or
if the determined size of the HARQ-ACK feedback codebook is greater than or equal to the preset threshold, (N−M) bits following the first M bits in the N bits are NACKs,
wherein the particular data is comprised in the at least one piece of data and is scheduled according to the second DCI type.

5. The method according to claim 1 , wherein if the type of the HARQ-ACK feedback codebook is the dynamic type, the HARQ-ACK feedback codebook comprises at least one of a first sub-codebook or a second sub-codebook, wherein the first sub-codebook comprises CBG-level HARQ-ACK information of data scheduled according to the first DCI type, and the second sub-codebook comprises TB-level HARQ-ACK information of data scheduled according to the second DCI type.

6. The method according to claim 5 , wherein:
first M1 bits in N1 bits that are in the first sub-codebook and that correspond to first data are CBG-level HARQ-ACK information of the first data, and wherein the following (N1−M1) bits in the N1 bits are NACKs, wherein N1 is a maximum quantity of CBGs configured by the network device for the first data, and wherein M1 is a quantity of CBGs actually comprised in the first data; and
one bit, in the second sub-codebook, corresponding to second data is TB-level HARQ-ACK information of the second data, and
wherein the first data is any data that is in the at least one piece of data and that is scheduled according to the first DCI type, and the second data is any data that is in the at least one piece of data and that is scheduled according to the second DCI type.

7. A terminal, comprising:
at least one processor;
a transmitter; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
detect downlink control information (DCI) in a plurality of time units corresponding to at least one carrier, wherein a type of the DCI is a first DCI type or a second DCI type, wherein the first DCI type is used to indicate to feed back code block group (CBG)-level hybrid automatic repeat request-acknowledgment (HARQ-ACK) information for data scheduled by using the first DCI type, and wherein the second DCI type is used to indicate to feed back transport block (TB)-level HARQ-ACK information for data scheduled by using the second DCI type;
determine a size of a HARQ-ACK feedback codebook, wherein N is a maximum quantity of CBGs configured by a network device for particular data, wherein M is a quantity of CBGs actually comprised in the particular data, and wherein:
if the determined size of the HARQ-ACK feedback codebook is less than a preset threshold, a first bit in N bits in the HARQ-ACK feedback codebook that correspond to the particular data is TB-level HARQ-ACK information of the particular data; or
if the determined size of the HARQ-ACK feedback codebook is greater than or equal to a preset threshold, first M bits in N bits that are in the HARQ-ACK feedback codebook and that correspond to the particular data are CBG-level HARQ-ACK information of the particular data; and

send, by the transmitter, the HARQ-ACK feedback codebook to the network device, wherein the HARQ-ACK feedback codebook comprises HARQ-ACK information of at least one piece of data scheduled by using the DCI, wherein the HARQ-ACK feedback codebook is determined according to the type of the DCI and a type of the HARQ-ACK feedback codebook, and wherein the type of the HARQ-ACK feedback codebook is a semi-persistent type or a dynamic type.

8. The terminal according to claim 7 , wherein:
if first data is scheduled according to the first DCI type, first M1 bits in N1 bits that are in the HARQ-ACK feedback codebook and that correspond to the first data are code block group (CBG)-level HARQ-ACK information of the first data, and wherein the following (N1−M1) bits in the N1 bits are negative acknowledgments (NACKs), wherein N1 is a maximum quantity of CBGs configured by the network device for the first data, and wherein M1 is a quantity of CBGs actually comprised in the first data; and
if second data is scheduled according to the second DCI type, the first bit in N2 bits in the HARQ-ACK feedback codebook that correspond to the second data is TB-level HARQ-ACK information of the

Assignees

• Huawei Tech Co Ltd

Inventors

• Peng Jinlin
• Song Xinghua
• Wang Fan

Classifications

• H04W72/23

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

• H04L1/1812

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

• H04L1/1621 Primary

  Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers · CPC title

• H04L1/1607

  Details of the supervisory signal · CPC title

• H04L5/0055 Primary

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