Patent ID: 8868090

Claim:
A method for receiving sensing results through a first station (STA) in a wireless local area network (LAN) system, the first station serving as an unlicensed device, which is allowed to operate in an available channel not being used by a licensed device at a TV white space (TVWS) band, the method comprising: transmitting a frame including a first element having information on a point when sensing is performed and a second element having a reporting sequence bitmap (RSM) that represents stations selected from a plurality of second stations to perform sensing and the sensing result report order of the selected stations to the plurality of second stations; receiving a measurement report frame, which includes a sensing result at the point when the sensing is performed, from each of the selected stations in accordance with the sensing result report order; and determining, using the measurement report frame, whether or not the licensed device is using a channel being used by the first station.