List multi-coloring based fair channel allocation policy for self coexistence in cognitive radio networks with QoS provisioning

Recently cognitive radio has gain considerable interest by research community as a viable solution to mitigate the problems of spectrum scarcity and spectrum under-utilization. A cognitive radio selects a vacant channel opportunistically and perform its own transmission on it. Detecting an incumbent user along with self-coexistence has become one of the important aspects of the cognitive radio. The former problem is solved by spectrum sensing while the latter problem requires complex techniques. To this end we propose a graph coloring based fair channel allocation policy for self-coexistence in cognitive radio networks. The proposed scheme allows multiple cognitive radio network operating over a given region to allocate channels on non-interfering basis with a certain grade of QoS. The scheme allows fair allocation of channels among multiple participating opportunistic networks with varying priorities. Simulation analysis has been done to show the effectiveness of the proposed approach.