一种基于队列模型的认知无线电带内频谱主动感知策略

基于周期性带内检测机制建立了一种优先级队列模型，得到了周期性带内检测机制的性能指标.针对周期性带内检测机制中缺乏对次用户空闲状态时间的利用，提出了一种基于空闲时间的带内主动感知策略(Idle Time based In band Proactive Sensing Strategy, ITIPSS).该策略在执行周期性带内感知的基础上，利用次用户的空闲时间主动感知当前占用的授权频段，以降低检测延时.仿真结果表明，相比周期性带内检测机制，ITIPSS能够有效降低对主用户的检测延时，从而减少次用户对主用户工作的干扰.

An In-band Proactive Sensing Strategy Based on Queuing Model in Cognitive Radio Networks

This paper formulated a priority queuing model for the periodical in-band sensing mechanism.On the basis of the analysis of this model,in which the idle time of the secondary user is lack of utilization,the paper proposed an idle time based in-band proactive sensing strategy(ITIPSS).In addition to executing periodical in-band sensing,ITIPSS uses the idle time gaps of the secondary user to detect the(primary's) return proactively.The simulation results show that ITIPSS can shorten the detection delay to the ...