# US 12,010,683 B2 · Transmission of a second ACK after failure of first ACK

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- Number: US 12,010,683 B2
- Document ID: US12010683B2
- Status: Granted
- Kind: B2
- Application number: 17/286,662
- Filed: 2019-10-28
- Published: 2021-11-25
- Granted: 2024-06-11
- Earliest claimed: 2018-10-28
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Taewon Song; Kiseon Ryu; Jeongki Kim; Jinsoo Choi; Suhwook Kim; Insun Jang
- Web page: https://patentgrep.com/patent/US12010683B2

## CPC

- H04W 72/20: Control channels or signalling for resource management
- H04L 1/18: Automatic repetition systems, e.g. Van Duuren systems
- H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)}
- H04W 28/04: Error control
- H04W 76/11: Allocation or use of connection identifiers
- H04W 76/15: Setup of multiple wireless link connections
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

In a wireless local area network (LAN) system, a first station (STA) may check the transfer failure of a first acknowledgement (ACK) signal for a first frame, the signal being received through a first link. The first STA may transmit report information related to the transfer failure of the first ACK signal to a second STA through a second link. Here, the report information may include identification information associated with the first link. The first STA may receive a second frame from the second STA through the first link. The first STA may transmit a second ACK signal for the second frame to the second STA through the first link on a narrowband.

## Claims

### Claim 1

A method in a Wireless Local Area Network (LAN) system, the method comprising:
confirming, by a first station (STA), a delivery failure of a first acknowledgment (ACK) signal for a first frame received through a first link;
transmitting, by the first STA to a second STA, report information related to the delivery failure of the first ACK signal through a second link, wherein the report information includes identification information related to the first link;
receiving, by the first STA, a second frame from the second STA through the first link; and
transmitting, by the first STA to the second STA, a second ACK signal for the second frame in a narrowband through the first link,
wherein the report information includes narrowband resource unit (RU) allocation request information.

### Claim 2 (depends on 1)

The method of claim 1, wherein the confirming the delivery failure of the first ACK signal comprises:
receiving, by the first STA, the first frame from the second STA through the first link;
transmitting, by the first STA to the second STA, the first ACK signal for the first frame through the first link; and
receiving, by the first STA, the first frame from the second STA through the first link.

### Claim 3 (depends on 1)

The method of claim 1, further comprising:
before transmitting the second ACK signal, receiving, by the first STA, a narrowband ACK request message from the second STA through the first link.

### Claim 4 (depends on 1)

The method of claim 1, wherein each of the first and second links is configured in one of 2.4 GHz, 5 GHz or 6 GHz frequency bands, and wherein the first and second links are configured in different frequency bands.

### Claim 5 (depends on 1)

The method of claim 1, wherein the report information includes at least one of information related to an ACK policy change request, information related to a reception success of the first frame, and information requesting to transmit a second ACK in a narrowband.

### Claim 6 (depends on 1)

The method of claim 1, wherein the narrowband includes 26 resource units (RUs) or 52 RUs.

### Claim 7

A first station (STA) in a Wireless Local Area Network (LAN) system, the first STA comprising:
a transceiver configured for transmitting and/or receiving a wireless signal;
a processor coupled to the transceiver,
wherein the processor is further configured for:
confirming, a delivery failure of a first acknowledgment (ACK) signal for a first frame received through a first link;
transmitting, to a second STA, report information related to the delivery failure of the first ACK signal through a second link, wherein the report information includes identification information related to the first link;
receiving a second frame from the second STA through the first link; and
transmitting, to the second STA, a second ACK signal for the second frame in a narrowband through the first link,
wherein the report information includes narrowband resource unit (RU) allocation request information.

### Claim 8 (depends on 7)

The first STA of claim 7, wherein the confirming the delivery failure of the first ACK signal comprises:
receiving the first frame from the second STA through the first link;
transmitting, to the second STA, the first ACK signal for the first frame through the first link; and
receiving the first frame from the second STA through the first link.

### Claim 9 (depends on 7)

The first STA of claim 7, wherein the processor is further configured for:
before transmitting the second ACK signal, receiving a narrowband ACK request message from the second STA through the first link.

### Claim 10 (depends on 7)

The first STA of claim 7, wherein each of the first and second links is configured in one of 2.4 GHz, 5 GHz or 6 GHz frequency bands, and wherein the first and second links are configured in different frequency bands.

### Claim 11 (depends on 7)

The first STA of claim 7, wherein the report information includes at least one of information related to an ACK policy change request, information related to a reception success of the first frame, and information requesting to transmit a second ACK in a narrowband.

### Claim 12 (depends on 7)

The first STA of claim 7, wherein the narrowband includes 26 resource units (RUs) or 52 RUs.