A novel on-demand routing protocol for cluster-based cognitive radio ad-hoc networkaware cognitive radio based hospital

With the rapid development of wireless technologies, the demand for radio spectrum is ever increasing. Along with the spectrum scarcity problem, radio spectrum is also underutilized. Cognitive radio practices an open spectrum allocation technique, which can ensure efficient handling of the frequency bands. Suitable network architecture with appropriate routing protocol is a must for the implementation of cognitive radio network. Thus, this paper presents a novel on-demand routing protocol for cluster-based cognitive radio ad-hoc network. In the proposed model, the network is divided into clusters, where spatial variations of spectrum are considered for clustering. The proposed routing protocol is defined as a weighted graph problem, where weight of a link is calculated based on three types of delay, namely switching delay, back-off delay and queuing delay. To evaluate the performance of the proposed protocol, simulation is conducted where it is found that the proposed protocol out performs other existing protocols.