A Historical-Information-Based Algorithm in Dynamic Spectrum Allocation

Cognitive radio is viewed as a novel approach for improving the utilization of radio frequency spectrum greatly by intelligently search and utilize free spectrum not used by licensed user. Dynamic spectrum allocation technology is one of the key technologies in realization of cognitive radio. In this paper we propose a new algorithm for spectrum sharing which considering historical allocation information of secondary user. Simulation results indicate this historical-information-based algorithm can achieve greater performance in sum bandwidth and fairness compared to the original algorithm.