Multiple Radios for Effective Rendezvous in Cognitive Radio Networks
Rendezvous is a fundamental operation in Cognitive Radio Networks (CRNs) for establishing a communication link on a commonly-available channel between cognitive users. The existing works on rendezvous implicitly assume that each cognitive user is equipped with one radio (i.e., one wireless transceiver). As the cost of wireless transceivers is dropping, this feature can be exploited to significantly improve the rendezvous performance at low cost. In this paper, the authors investigate the rendezvous problem in CRNs where cognitive users are equipped with multiple radios and different users may have different number of radios. They first study how the existing rendezvous algorithms can be generalized to use multiple radios for faster rendezvous.