Abstract: Cognitive Radio (CR) has immerged as the solution for spectrum inefficiency and spectrum scarcity. In many research papers so far, various frameworks and infrastructures have been proposed for deployment of CR network. In this paper, we have come up with an approach to further enhance the quality of CR communications. In the proposed method, we employ the concepts of extended area accompanied by need-based usage of unlicensed spectrum. We concentrate more on explaining the framework concept than its mathematical modelling. The simulation results show improvement in switching latency during hand-offs and overall quality enhancement of the CR communication.

Keywords: Cognitive radio, handoff, extended area, spectrum pool, unlicensed spectrum.