An evolutionary game-based spectrum sharing scheme

Spectrum shortage and low spectrum utilization have attracted much attention. In order to meet the communication demands of users, the dynamic and efficient spectrum management scheme with cognitive radio technology has been used. Spectrum share is the key component in the dynamic spectrum management. To enable cognitive user (CU) to share spectrum fairly, an evolutionary game-based spectrum sharing scheme is designed based on the results of spectrum sensing. The knowledge of fuzzy mathematic is introduced to characterize the parameters related to cognitive user satisfaction degree (CUSD). Gas Brownian motion optimization (GBMO) is used to solve the problem of spectrum access cost of CU, the fairness of spectrum sharing is considered in utility function, the dynamic equilibrium is solved according to replicator dynamic equation (RDE), finally, the detailed implementation steps of the scheme are given. Simulation results have shown that the proposed scheme is both feasible and effective.