Abstract

Modular-based channel hopping (CH) rendezvous algorithms can provide guaranteed rendezvous for Cognitive Radio Networks (CRNs) without time synchronization or Common Control Channels (i.e., blind rendezvous). The Enhanced Jump-Stay (EJS) scheme [1] has now been recognized as arguably the best in terms of Maximum-Time-To-Rendezvous (MTTR) and bounds for the Expected-Time-To-Rendezvous (ETTR) for users with a different number of channels (asymmetric). In [2], we developed a probabilistic channel detecting jamming attacks that dramatically decreased the rendezvous success rates of EJS and developed the Random Enhanced Jump Stay (REJS) CH rendezvous algorithm that largely mitigated those jamming attack. Here we provide extensions of EJS and REJS and provide guidelines when they should be used. The focus in [2] was jamming mitigation but here we carefully analyze the performance of several new algorithms while still guaranteeing bounded MTTR and improved the ETTR over EJS. In fact, it appears EJS should seldom be used. We show our jump-stay extensions are better than EJS with significant decreases in the average TTR.

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