Method and device for transmitting signal through multi-link in wireless LAN system
A method for operation in a wireless local area network (WLAN) system according to various embodiments may comprise the steps of: determining, by a transmitting device, whether a second link is in an idle state for a first time interval, after receiving an ACK through a first link within a TXOP configured for the first link; aggregating, by the transmitting device, the first link and the second link on the basis of the determination; and transmitting, by the transmitting device, a packet through the aggregated first link and second link.
1. A method in a wireless local area network (WLAN) system, comprising:
transmitting, by a station (STA), a Probe Request frame comprising capability information,
wherein the capability information comprises identification information of a plurality of links supported by the STA and 6 GHz capability information related to whether the STA supports a 6 GHz link;
obtaining, by the STA, a transmission opportunity (TXOP) for a pre-defined link which is different from the 6 GHz link;
transmitting, by the STA, a physical protocol data unit (PPDU) through the pre-defined link;
receiving, by the STA, an ACKnowledgement (ACK) frame for the PPDU through the pre-defined link;
determining, by the STA, whether a backoff counter (BC) value of the 6 GHz link reaches zero after receiving the ACK frame;
determining, by the STA, whether the 6 GHz link is maintained to be idle for a pre-defined time period after the BC value of the 6 GHz link reaches zero;
aggregating, by the STA, the pre-defined link and the 6 GHz link based on the determination; and
transmitting, by the STA, a packet through the aggregated links.
2. A transmitting device, comprising:
a transceiver for transmitting/receiving RF signals; and
a processor connected to the transceiver,
wherein the processor is configured to:
transmit a Probe Request frame comprising capability information,
wherein the capability information comprises identification information of a plurality of links supported by the STA and 6 GHz capability information related to whether the STA supports a 6 GHz link;
obtain a transmission opportunity (TXOP) for a pre-defined link which is different from the 6 GHz link;
transmit a physical protocol data unit (PPDU) through the pre-defined link;
receive an ACKnowledgement (ACK) frame for the PPDU through the pre-defined link;
determine whether a backoff counter (BC) value of the 6 GHz link reaches zero after receiving the ACK frame;
determine whether the 6 GHz link is maintained to be idle for a pre-defined time period after the BC value of the 6 GHz link reaches zero;
aggregate the pre-defined link and the 6 GHz link based on the determination; and
transmit a packet through the aggregated links.
3. The STA of claim 2 , wherein the pre-defined link comprises at least one of a 2.4 GHz link and a 5 GHz link.
4. The STA of claim 2 , wherein the pre-defined time period is a Point coordination function InterFrame Space (PIFS) duration.
5. The STA of claim 2 , wherein the aggregation of the pre-defined link and the 6 GHz link is performed when the 6 GHz link is maintained to be idle for the pre-defined time period after the BC value of the 6 GHz link reaches zero.
6. The STA of claim 2 , wherein the STA determines whether the 6 GHz link is maintained to be idle based on clear channel assessment (CCA) sensing of the 6 GHz link.
7. The method of claim 1 , wherein the pre-defined link comprises at least one of a 2.4 GHz link and a 5 GHz link.
8. The method of claim 1 , wherein the pre-defined time period is a Point coordination function InterFrame Space (PIFS) duration.
9. The method of claim 1 , wherein the aggregation of the pre-defined link and the 6 GHz link is performed when the 6 GHz link is maintained to be idle for the pre-defined time period after the BC value of the 6 GHz link reaches zero.
10. The method of claim 1 , wherein the STA determines whether the 6 GHz link is maintained to be idle based on clear channel assessment (CCA) sensing of the 6 GHz link.