MAC Protocol for Two Level QoS Support in Cognitive Radio Network

The exponential increase in the number of mobile devices using large bandwidth and real-time applications has met with challenges of spectrum scarcity and real-time MAC design. To this end we propose an energy efficient cognitive radio MAC protocol with two-level QoS support, called as TQCR-MAC. We have divided the traffic into two types-real time and non-real time data traffic. The TQCR-MAC protocol utilizes the unused spectrum and provides QoS support for different traffic. The TQCR-MAC exploits the combination of multiple channels and TDMA scheme to further improve the QoS provisioning. The simulation result shows that our proposed protocol improves the network performance significantly, especially when the network is either biased towards real time or non-real time data traffic.