Optimizing dynamic spectrum allocation for cognitive radio networks using hybrid access scheme

摘要: Allowing Secondary Users (SUs) to access the licensed spectrum without causing harmful interference Primary (PUs) is crucial in enabling Cognitive Radio (CR) technology. In order increase utilization of bands, we propose a Dynamic Spectrum Allocation (DSA) algorithm that integrates both interweave and underlay schemes. The proposed will jointly take into account geographical locations nodes, correlated shadow fading, between primary secondary networks, SUs are transmitting on same channel, communications activity users. Moreover, suboptimal heuristic DSA takes consideration all aforementioned issues, while requiring low computational- time-costs, developed. Simulation results show provides good success rate outperforms classical allocation algorithms.