Packet Schedule Algorithm for Cognitive Radio Network with Spectrum Underlay Sharing
Gao Li-fei · Jisuanji gongcheng · 2012
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.