The Design of Scheduling Algorithm for Cognitive Radio Networks Based on Genetic Algorithm

In order to improve the spectrum utilization while providing a fairness guarantee between users under the dynamic spectrum resources, the optimization problem for the scheduler of OFDM system with an unlimited queue capacity in cognitive radio networks (CRN) is first formulated. Then, under the constraints of the optimization problem, the Genetic Algorithm for Cognitive Radio Scheduler (GACRS) is proposed based on the Simple Genetic Algorithm (SGA) to solve the optimization problem. Simulation results show that, by adjusting the proportion factor in the fitness function, GACRS algorithm can guarantee the fairness among users while reaching the upper limit of the spectrum utilization.