A method and transceiver for determining spectrum availability within a give area is disclosed. The given area includes cells in a grid. A belief evaluator receives a measurement from a signal and assigns an instantaneous belief indicator, an instantaneous disbelief indicator and an instantaneous ignorance...http://www.google.com.tw/patents/US8064840?utm_source=gb-gplus-share專利 US8064840 - Method and system for determining spectrum availability within a network