适用于频谱重叠共享CRN的分组调度算法

Packet Schedule Algorithm for Cognitive Radio Network with Spectrum Underlay Sharing

为在降低认知用户对主用户干扰的同时保障认知业务的服务质量(QoS),提出一种基于干扰控制的分组调度算法,适用于以频谱重叠共享方式接入的认知无线电网络。该算法在MLWDF-IM算法的基础上进行改进,定义干扰控制因子和服务紧迫性函数,以此设计调度策略。仿真结果表明,该算法能在干扰抑制性能略有降低的情况下提高业务的QoS。

In order to reduce the interference caused by Cognitive User（CU） to Primary User（PU） while guaranteeing the Quality of Service（QoS） demands for all services, this paper proposes a packet schedule algorithm based on interference control. It is suitable for the Cognitive Radio Network（CRN） with spectrum underlay sharing. The algorithm improves the Modify Largest Weighted Delay First with Interference Mitigation （MLWDF-IM） algorithm, defines the Interference Control Factor（ICF） and Service Urgency Function（SUF） to design schedule strategy. Simulation results show that the proposed algorithm can improve the QoS for all services with only a limited decline in the interference performance.