Cluster based routing algorithm for robustness

Connectivity and robustness of ad-hoc cognitive radio network are the challenges faced by cognitive radio network due to moving nature of the channels, which are available for the communication to take place, among cognitive radio nodes. This challenge can be addressed by the concept of Clustering, which groups the neighboring nodes of a cognitive radio network. It helps the node to switch to other channel i.e. coordinated channel switching. It also helps in better spectrum sensing and simplification of routing. But the connectivity between or within cluster could be lost due to sudden movement of the primary nodes. In the following work, two different distributed algorithms are discussed. A new algorithm RESS is proposed which helps to maintain the inter and intra cluster connectivity so that robustness can be strengthened between the nodes.