P.Venkatesh
M.E - Department of Computer Science and Engineering Srividhya college of Engineering and technology, Virudhunagar, Tamilnadu, India.
Recently, cognitive radio
(CR) has become a key technology for addressing spectrum scarcity. In CR
networks, spectrum access should not interfere the colocate incumbent networks.
Due to the requirement above, common control channel approaches, which are
widely used in traditional multichannel environments, may face serious CR
long-time blocking problem and control channel saturation problem. Although
channel-hopping-based approaches can avoid these two problems, existing works
still have significant drawbacks including long time-to-rendezvous, unbalance
channel loading, and low channel utilization. In this paper, we introduce three
channel-hopping approaches, RCCH, ARCH, and SARCH for synchronous and
asynchronous environments, respectively. Compared with previous works, our
schemes outperform the state of the art in terms of these metrics.
