QoS Provisioning Spectrum Management Based on Intelligent Matching and Reservation for Cognitive Radio System

To improve spectrum utilization, cognitive radio attempts to use temporarily unoccupied spectrum which is referred to spectrum hole in cognitive radio. In this paper, we introduce novel spectrum management algorithms for cognitive radio. We introduce a heuristic matching algorithms which is named cost minimized matching. The heuristic algorithm proposed in this paper outperforms the general random matching algorithm with respect to the expected number of handovers and handover probability fairness. Also, the spectrum hole reservation algorithm minimizes service dropping while using optimum amount of resource, and it realizes seamless service by eliminating delay generated due to spectrum change. Performance analysis and computer simulations validate the efficiency of the proposed algorithms. The proposed algorithms can be efficiently used in cognitive radio systems.