Traffic adaptive channel utilization based medium access control protocol for cognitive radio network

Abstract

The increasing rate of wireless devices pressurizes the researchers to think about an opportunistic bandwidth utilization of the licensed bands. As a result, the concept Cognitive Radio Network (CRN) having Primary user (PU) and Secondary user (SU) has been evolved. However, the challenges of CRN basically includes successful channel rendezvous. As of now, most of the protocol either used common control channel or synchronization approach, where bottleneck and unavailability of control channel might occur due to presence of PU. Furthermore, once channel rendezvous is successful traffic adaptive channel utilization in medium access design is missing in existing works. Therefore, motivating with the mentioned limitation, we have proposed a Traffic Adaptive Channel Utilization based Medium Access Control (TACU-MAC) for CRN. The protocol targets to make successful and fast channel rendezvous as well as ensure channel utilization rate in data transmission. Extensive analysis and simulation have demonstrated that traffic adaptability of the proposed work has ensured better rendezvous success rate, lower rendezvous delay, higher throughput and transmission success rate.