CAJ | 학술논문

　　如何合理选择频谱感知时间和数据传输时间使系统传输效率最大化是认知无线电研究的一个重要方向，具有极其广泛的应用背景。针对该问题，该文提出一种认知无线电周期数据传输优化机制，并分别给出频谱感知时间、信道搜索时间以及数据传输时间的优化计算方法。从数值及仿真结果可知，在不同的主用户到达强度的情况下，所得到的最优频谱感知时间、最优信道搜索时间和最优数据传输时间能够确保对主用户的保护性并有效降低数据传输延迟。
　　여하합리선택빈보감지시간화수거전수시간사계통전수효솔최대화시인지무선전연구적일개중요방향，구유겁기엄범적응용배경。침대해문제，해문제출일충인지무선전주기수거전수우화궤제，병분별급출빈보감지시간、신도수색시간이급수거전수시간적우화계산방법。종수치급방진결과가지，재불동적주용호도체강도적정황하，소득도적최우빈보감지시간、최우신도수색시간화최우수거전수시간능구학보대주용호적보호성병유효강저수거전수연지。
Selecting appropriate spectrum sensing time and data transmission time to maximize systemic transmission efficiency is a core research region in Cognitive Radio (CR), it has comprehensive application background. In this paper, a cycle transmission optimization mechanism is proposed. In the optimization algorithm, spectrum detection time, channel searching time and data transmission time are derived respectively. Numerical and simulation results show that the obtained optimal spectrum detection time, optimal channel search time and optimal data transmission time can protect primary user’s right and decrease data transmission delay effectively.