Transmission of a second ACK after failure of first ACK
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.
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.
2. 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.
3. 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.
4. 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.
5. 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.
6. The method of claim 1 , wherein the narrowband includes 26 resource units (RUs) or 52 RUs.
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.
8. 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.
9. 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.
10. 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.
11. 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.
12. The first STA of claim 7 , wherein the narrowband includes 26 resource units (RUs) or 52 RUs.