提出了一种利用最优空闲授权信道通信的认知无线电介质访问控制(MAC)协议.采用该协议的每个次要(非授权)用户根据对多个授权信道的感知结果,选择最优的空闲授权信道通信,该协议同时解决了"隐藏"终端和"暴露"终端的问题.并建立数学模型分析了在饱和网络状况下该MAC协议的吞吐量.仿真结果表明,数学模型可以精确计算该MAC协议的饱和吞吐量.
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.