Performance Analysis of Cognitive Radio Networks (IEEE 802.22) for Various Network Traffics

In nowadays the number of wireless users and applications increases, it has become more and more difficult for the proper spectrum utilization by allocate frequencies. However measurements have shown that there is no spectrum scarcity; rather, there is inefficient utilization only. Cognitive Radio (CR) to facilitate efficient utilization of the radio spectrum in a fair-minded way and to provide highly reliable communication for all users of the networks. In this paper, a simulation framework based on NetSim simulator is proposed. This framework can be used to investigate and evaluate the impact of lower layers, i.e., data link layer and physical layer. Due to the importance of packet drop probability, delay and throughput as QoS requirements in real-time reliable applications, these metrics are evaluated over Cognitive Radio Networks (CRNs) through NetSim simulator. Our simulations demonstrate that the design of new networks over CRNs should be considered based on CR-related parameters such as activity model of Primary Users(PU), Secondary Users(SU),sensing time ,spectral efficiency, throughput, delay and Interference. An Analysis of the result shows that, the CBR traffic is the best in terms of throughput and spectral efficiency when the different conditions of PUs and SUs