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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.
Based on the analysis of the relationship between the service type of cognitive radio and the main user’s spectrum hole length, this paper proposes a dynamic spectrum selection algorithm for cognitive service type perception. By connecting cognitive service to its service duration In idle time slot of primary user, the idle channel is dynamically selected according to the service type of cognitive user, so as to reduce the probability of collision between cognitive service and primary user service and increase the usage efficiency of primary user spectrum idle gap. The simulation results show that this algorithm is effective To reduce the cognitive user’s business conflict rate, to further improve the utilization of spectrum resources.