# US 12,192,009 B2 · Method and apparatus for performing HARQ-ACK transmission

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- Number: US 12,192,009 B2
- Document ID: US12192009B2
- Status: Granted
- Kind: B2
- Application number: 17/442,984
- Filed: 2020-02-28
- Published: 2022-06-02
- Granted: 2025-01-07
- Earliest claimed: 2019-03-25
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Daiichiro Nakashima; Tomoki Yoshimura; Hui-Fa Lin; Toshizo Nogami; Wataru Ouchi; Shoichi Suzuki; Taewoo Lee
- Web page: https://patentgrep.com/patent/US12192009B2

## CPC

- H04L 1/1854: {Scheduling and prioritising arrangements}
- H04L 1/1614: {using bitmaps}
- H04L 1/1685: {the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal}
- H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)}
- H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 27/0006: {Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14)}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A communication method used for a terminal device is provided. The communication method comprises triggering transmission of a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook; and when transmission of a second HARQ-ACK codebook is triggered before the first HARQ-ACK codebook has been transmitted, canceling the transmission of the first HARQ-ACK codebook; and transmitting the second HARQ-ACK codebook.

## Claims

### Claim 1

A terminal device comprising:
at least one processor; and
at least one non-transitory computer-readable medium storing one or more computer-executable instructions that, when executed by the at least one processor, cause the terminal device to:
trigger a transmission of a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook; and
when a transmission of a second HARQ-ACK codebook is triggered before the first HARQ-ACK codebook has been transmitted:
cancel the transmission of the first HARQ-ACK codebook, and
transmit the second HARQ-ACK codebook, wherein:
the first HARQ-ACK codebook defines a relationship between a slot in which the first HARQ-ACK codebook is transmitted/received and a physical downlink shared channel (PDSCH) slot corresponding to a HARQ-ACK among at least one HARQ-ACK included in the first HARQ-ACK codebook, and
the second HARQ-ACK codebook defines a HARQ process of a PDSCH corresponding to a HARQ-ACK among at least one HARQ-ACK included in the second HARQ-ACK codebook.

### Claim 2 (depends on 1)

The terminal device according to claim 1, wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the terminal device to:
when a first HARQ process set comprising one or more HARQ processes corresponding to the at least one HARQ-ACK included in the first HARQ-ACK codebook is included in a second HARQ process set comprising one or more HARQ processes corresponding to the at least one HARQ-ACK included in the second HARQ-ACK codebook, cancel the transmission of the first HARQ-ACK codebook.

### Claim 3 (depends on 2)

The terminal device according to claim 2, wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the terminal device to:
when the first HARQ process set is not included in the second HARQ process set, forgo canceling the transmission of the first HARQ-ACK codebook.

### Claim 4

A communication method used for a terminal device, the communication method comprising:
triggering a transmission of a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook; and
when a transmission of a second HARQ-ACK codebook is triggered before the first HARQ-ACK codebook has been transmitted:
canceling the transmission of the first HARQ-ACK codebook, and
transmitting the second HARQ-ACK codebook, wherein:
the first HARQ-ACK codebook defines a relationship between a slot in which the first HARQ-ACK codebook is transmitted/received and a physical downlink shared channel (PDSCH) slot corresponding to a HARQ-ACK among at least one HARQ-ACK included in the first HARQ-ACK codebook, and
the second HARQ-ACK codebook defines a HARQ process of a PDSCH corresponding to a HARQ-ACK among at least one HARQ-ACK included in the second HARQ-ACK codebook.

### Claim 5 (depends on 4)

The communication method according to claim 4, further comprising:
when a first HARQ process set comprising one or more HARQ processes corresponding to the at least one HARQ-ACK included in the first HARQ-ACK codebook is included in a second HARQ process set comprising one or more HARQ processes corresponding to the at least one HARQ-ACK included in the second HARQ-ACK codebook, canceling the transmission of the first HARQ-ACK codebook.

### Claim 6 (depends on 5)

The communication method according to claim 5, further comprising:
when the first HARQ process set is not included in the second HARQ process set, forgoing canceling the transmission of the first HARQ-ACK codebook.