业务类型感知的认知无线电动态频谱选择算法

Service Type Based Dynamic Spectrum Choice Scheme for Cognitive Radio

在分析认知无线电的业务类型与主用户频谱空穴时长之间关系的基础上,提出一种认知业务类型感知的动态频谱选择算法.通过将认知业务接入到与其服务时长相近似的主用户频谱空闲时间隙中,结合认知用户的业务类型动态选择空闲信道,降低认知业务与主用户业务冲突的概率,增加主用户频谱空闲间隙的使用效率.模拟结果表明,本算法能够有效地降低认知用户的业务冲突率,进一步提高频谱资源的利用率.

With reference to the relationship between the time required by different cognitive services and the available length of idle time slot in authorized spectrum hold by different primary users,a service type based dynamic spectrum choice scheme had been introduced.Since spectrum channel with different length of idle time will be selected by different cognitive services according to their service time,our scheme can achieve better performance than most traditional schemes.Extensive simulation results show that the proposed scheme can reduce the collision probability and improve the utilization of available spectrum resources efficiently.