Signal transmission/reception method in wireless lan system, and device therefor

A station (STA) device for transmitting a frame in a wireless LAN (WLAN) system, the STA device comprising:

• a memory;
• a transceiver;
• and
• a processor being operatively connected to the memory and the transceiver,
• wherein the processor is configured:
• to transmit a Link Measurement Request frame requesting Transmit Power Control (TPC) information to another STA;
• and
• to receive a Link Measurement Report frame from the other STA, the Link Measurement Report frame being transmitted as a response to the Link Measurement Request frame,
• wherein the Link Measurement Request frame includes a TPC Configuration field,
• wherein the TPC Configuration field includes a first sub-field and a second sub-field,
• wherein the first sub-field includes information on whether or not the Link Measurement Request frame is transmitted through a channel on which channel aggregation is performed,
• wherein the second sub-field includes information on a number of transmit chains being used for transmitting the Link Measurement Request frame, and
• wherein, if the Link Measurement Request frame is transmitted through the channel on which the channel aggregation is performed, the number of transmit chains is equal to an even number.

A method for receiving a frame in a wireless LAN (WLAN) system, the method comprising:

• receiving, by a first station (STA), a Link Measurement Request frame requesting Transmit Power Control (TPC) information from a second STA;
• and
• transmitting, by the first STA, a Link Measurement Report frame to the second STA, the Link Measurement Report frame being transmitted as a response to the Link Measurement Request frame,
• wherein the Link Measurement Request frame includes a TPC Configuration field,
• wherein the TPC Configuration field includes a first sub-field and a second sub-field,
• wherein the first sub-field includes information on whether or not the Link Measurement Request frame is transmitted through a channel on which channel aggregation is performed,
• wherein the second sub-field includes information on a number of transmit chains being used for transmitting the Link Measurement Request frame, and
• wherein, if the Link Measurement Request frame is transmitted through the channel on which the channel aggregation is performed, the number of transmit chains is equal to an even number.