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在Overlay模式的认知无线网络中,认知用户利用主用户空闲的授权频带传输数据。为了使认知用户的传输收益最大而能耗最小,认知用户需要合理分配感知时长与传输时长的比例,同时还需要选择合适的感知器采样频率。因此文章提出了同时考虑传输收益和能耗的联合效用函数,证明了该联合效用函数存在最优解,经仿真得到了使联合效用函数最大的最优感知时长和感知器采样频率。
In Overlay mode of cognitive wireless network, cognitive users use the main user free authorized band to transmit data. In order to minimize the energy consumption of the cognitive user, the cognitive user needs to rationally allocate the ratio of the sensing duration to the transmission duration, and at the same time, select the appropriate perceptron sampling frequency. Therefore, the paper proposes a joint utility function that takes into account both revenue and energy consumption, and proves that the joint utility function has the optimal solution. The optimal sensing duration and perceptron sampling frequency that maximizes the joint utility function are obtained by simulation.