Patent ID: 8675594

Claim:
A method of assigning quiet periods (QPs) to perform spectrum sensing, performed by a terminal, a station, or an equipment in a cognitive radio system, the method comprising: determining at least one frequency channel to which the QPs are assigned; and establishing time locations of the QPs of the at least one frequency channel according to a channel conversion time, wherein the establishing of the time locations comprises: determining two or more frequency channels to establish time locations of QPs of the frequency channels so that the QPs do not overlap each other between different frequency channels, wherein each super frame of the cognitive radio system includes a plurality of frames, wherein the establishing of the time locations further comprises: forming the super frames so that the time locations of the frames including QPs differ from each other between different frequency channels, and assigning the QPs of frequency channels which are channel-bonded to the super frames so that the time locations of the frames including the QPs are adjacent to each other in the order of the frequency channels.