Research on the Routing Algorithm Based on QoS Requirement for Cognitive Radio Networks

Cognitive radio network has received increasing attention in recent few years. Cognitive radio network is viewed as a novel network for improving the utilization of a precious natural resource: the radio electromagnetic spectrum. This paper first gives a general overview of the background and concept of cognitive radio network. Then we focus on the routing algorithm based on the QoS requirement. In this paper, the characteristic of QoS requirement and the mathematical model of cognitive radio network are investigated. Finally, a novel term s which considers the effect of the bandwidth and the delay is introduced. We can take into account the term s for the QoS requirement of each session in future work, which means just a fixed value of s, rather than the bandwidth and the delay, will be requested when we provide our QoS requirement for a session.