| 摘要 |
<p>PURPOSE: A vacant channel searching method in a recognition wireless system is provided to reduce a vacant channel search error probability. CONSTITUTION: Tsense is determined by a spectrum sensing type by considering a signal detecting method, a target object warning probability, a target signal detecting probability, a required sensing threshold, and a channel environment. Tdown and Tup are determined by a distance between a center node and a CR(Cognitive Radio) device and a MAC protocol(200). If Tsense > K(Tdown+Tup) is satisfied through a three parameters, a cooperative sensing process per one channel is performed(220). If not, a vacant channel is searched by a cooperative sensing process per multi channels(230).</p> |
