Consensus-based Spectrum Sensing in Cognitive Radio Networks

Natalia Y. Ermolova, Olav Tirkkonen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

In this work, we analyze a distributed cooperative spectrum sensing scheme where N secondary users (SUs) of a cognitive wireless network make a joint decision on the primary user (PU) presence based on an agreement reached through interchanging of SU's individual decisions. The operational protocol assumes that each SU updates the personal decision by using
the "K-out-of-N" rule, and the network detects the PU if the nodes reach the consensus. The problem of forming a joint opinion becomes challenging because a SU makes its personal decision based on local observations distorted by a wireless propagation medium. In this paper, we analyze statistics of factors affecting the algorithm efficiency and obtain sufficient conditions of reaching consensus. The presented analysis takes into account possible node disconnections caused by poor propagation conditions.
Original languageEnglish
Article numbere1
Pages (from-to)1-8
Number of pages8
JournalEAI Endorsed Transactions on Cognitive Communications
Volume2
Issue number7
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • Cognitive radio networks
  • Cognitive radio networks, distributed spectrum sensing, social wireless networks
  • wireless propagation
  • distributed spectrum sensing

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