A MAC Protocol for Utilizing the Optimal Idle Channel in Cognitive Radio Wireless Networks

A mdeia access control(MAC)protocol,utilizing the optimal idle licensed channel,is proposed for cognitive radio wireless networks.The protocol enables the secondary(unlicensed)users to select the optimal idle licensed channel with spectrum sensing of multiple licensed channels,and solves the problems of hidden terminals and exposed terminals.An analytic model is proposed to analyze the throughput of our proposed MAC protocol under the saturated network case.Simulations show that the model is very accurate in evaluating the saturation throughput of our proposed MAC protocol.