Resumo

ORTIZ GUERRA, Erik  e  ALFONSO REGUERA, Vitalio. Rendezvous algorithms for cognitive radio networks. EAC [online]. 2015, vol.36, n.3, pp. 35-45. ISSN 1815-5928.

Cognitive radio is a promising paradigm to address the scarcity of radio spectrum as well as for efficient usage. The rendezovus process allows two cognitive users to meet on the same channel and establish a communication link. This work focuses on the study and comparison of different rendezvous algorithms proposed in the literature. We present the major rendezvuos challenges in the context of cognitive networks as well as the main metrics used for evaluation. Through simulation, we evaluate the performance of a group of rendezvous algorithms in practical scenarios and the results are contrasted with the theoretical results given by the authors. The simulation results show that for most of the rendezvous algorithms proposed in the literature the theoretical results provided by the authors are far from the real results achieved by the algorithms. Additionally, in symmetric scenarios, the EJS algorithm has the better results in terms of ETTR and MTTR, while in asymmetric scenarios the FRCH and SSB algorithms outperform the others rendezvous strategies.

Palavras-chave : Cognitive radio networks; blind rendezvous; rendezvous algorithm.

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