An Effective Algorithm for Finding Common Control Channel in Cognitive Radio Ad Hoc Networks Using a Single Transceiver and a Backup Channel

One of the fundamental challenges in distributed cognitive radio ad-hoc networks is to develop a common control channel (CCC) in which secondary users (SU)can meet and send control messages. This channel is exclusively used by cognitive radio users. In order to implement a CCC, a new method is presented in this paper. In this method, all SUs are equipped with a single radio card that has a cognitive capability. The proposed algorithm is very flexible which sustains the precise work of cognitive radio network as well as preparing a channel in which the users can visit each other. Our proposed method not only uses a backup channel, but also it uses a single transceiver.