Abstract
Abstract Cognitive radio networks (CRNs) have emerged as a promising paradigm that can solve the shortage of spectrum resources, providing the ability to adapt and opportunistically exploit the spectrum holes. The rendezvous process allows cognitive users to find a common channel and establish a communication link. In this paper, we focus on the design of fast blind rendezvous algorithms to guarantee that every node should be able to rendezvous in all common available channels. We follow a systematic approach by first proposing a role-based algorithm that ensures maximum rendezvous diversity and then extending it to a common strategy through the use of multiples radios. Both proposals guarantee rendezvous under symmetric and asymmetric models. Simulation results show that our proposals outperform other recently developed rendezvous protocols with similar approaches in terms of expected time to rendezvous and maximum time to rendezvous.
Highlights
Recent spectrum measurements indicate that much of licensed spectrum is underutilized most of the time and unlicensed spectrum has been overcrowded due to the growth of wireless applications
In the case of protocols which consider that secondary user (SU) have two radios, the performance of role-based parallel sequence (RPS) in terms of expected TTR (ETTR) is better than the proposed full diversity channel hopping (FDCH)-common strategy (CS)
8 Conclusions In this paper, we focus on the design of channel hopping (CH) sequences that ensure maximum rendezvous diversity and low ETTR for SUs in Cognitive radio networks (CRNs)
Summary
Recent spectrum measurements indicate that much of licensed spectrum is underutilized most of the time and unlicensed spectrum has been overcrowded due to the growth of wireless applications. We follow a systematic approach by first proposing a full diversity channel hopping (FDCH) role-based algorithm that ensures maximum rendezvous diversity, and extending it to a common strategy through the use of multiples radios.
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More From: EURASIP Journal on Wireless Communications and Networking
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