Advanced Frame Structures in Cognitive Radio Networks

We have perceived the potentials of spectrum accessing techniques in the cognitive radio networks where the hybrid spectrum access (HSA) is an advanced technique which exploits the interweave and underlay spectrum access strategies simultaneously to enhance the spectral efficiency and throughput. This chapter presents a novel hybrid‐cum‐improved spectrum access technique (HISA) for significant improvement in the throughput, data‐loss rate, and interference at the PU. The spectrum accessing strategies and frame structures are the key elements of the HISA techniques; therefore, the work related to these elements is presented. The proposed frame structures and their combination with HSA are illustrated. The chapter also consists of the mathematical analysis of the throughput and data loss. The throughput and data loss optimization by constraining various metrics is an exigent task which is a potential issue for the future research.” The numerically simulated results of the proposed approach are illustrated and compared with the conventional approach.