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Efficient Discovery and Recovery of Common Control Channel in Cognitive Radio Wireless Ad Hoc Networks

<04> This paper proposes a novel protocol for searching, scanning, and accessing the control channel in cognitive radio (CR) networks. The protocol consists of two levels of selection: rapid channel accessing and reliable channel accessing. In rapid channel accessing, nodes quickly and efficiently converge to a newly found control channel. In reliable channel accessing, switching to the backup control channel is performed when necessary. Furthermore, the proposed reliable channel accessing allows CR nodes to access more than one control channel simultaneously. The performance results from analytical modelling show that the proposed protocol can achieve efficient channel access time and fairness.