Method and device for selectively transmitting subchannel based on target wake time in wireless lan system

A first station (STA) performing a subchannel selective transmission (SST) operation in a wireless LAN system, the first STA comprising:

• at least one transceiver;
• and
• at least one processor connected to the at least one transceiver,
• wherein the at least one processor is configured to:
• receive, from a second STA through the at least one transceiver, a target wake time (TWT) element including a control field and an individual TWT parameter set field;
• and
• perform the SST operation based on the TWT element,
• wherein the control field includes a first field indicating a format of the individual TWT parameter set field supporting a bandwidth of 320 MHz or more, and
• wherein the TWT element includes a second field related to a channel width resolution for the SST operation.

A second station (STA) performing subchannel selective transmission (SST) operation in a wireless LAN system, the second STA comprising:

• at least one transceiver;
• and
• at least one processor connected to the at least one transceiver,
• wherein the at least one processor is configured to:
• transmit, to a first STA through the at least one transceiver, a target wake time (TWT) element including a control field and an individual TWT parameter set field;
• and
• perform the SST operation based on the TWT element,
• wherein the control field includes a first field indicating a format of the individual TWT parameter set field supporting a bandwidth of 320 MHz or more, and
• wherein the TWT element includes a second field related to a channel width resolution for the SST operation.