Opportunistic Spectrum Access Strategy Design in Heterogeneous QoS Environment
Jianzhao Zhang · Jisuanji fangzhen · 2013
Considering the scenario of cognitive radio Networks(CRN) single channel opportunistic spectrum access,a single channel opportunistic spectrum access model was established which provided CR QoS guarantee and also promised interference-free to primary radios(PR).The model aimed at maximizing the useful cognitive radio network(CRN) throughput which was a new metric defined.The minimum rate gap-based access strategy was proposed and the corresponding minimum rate gap based channel and power allocation(MRG-CPA) algorithm and MAC protocol was demonstrated.Simulation results show that MRG-CPA provides more useful CRN network throughput as well as improves the CR QoS guarantee rate than existing solutions such as the first Fit Deceasing algorithm,best fit deceasing algorithm and least rate requirement based channel and power allocation algorithm.