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Initial Rendezvous Protocol using Multicarrier Operation for Cognitive Radio Ad-hoc Networks

  • Choi, Ik-Soo (Department of Information and Communication Engineering, University of Inha) ;
  • Yoo, Sang-Jo (Department of Information and Communication Engineering, University of Inha) ;
  • Seo, Myunghwan (Hanwha Systems) ;
  • Han, Chul-Hee (Hanwha Systems) ;
  • Roh, Bongsoo (The 2nd R&D Institute, Agency for Defense Development)
  • Received : 2017.10.31
  • Accepted : 2018.02.05
  • Published : 2018.06.30

Abstract

In cognitive radio technology, the overall efficiency of communications systems can be improved without allocating additional bands by allowing a secondary system to utilize the licensed band when the primary system, which has the right to use the band, does not use it. In this paper, we propose a fast and reliable common channel initialization protocol without any exchange of initialization messages between the cluster head and the member nodes in cognitive ad-hoc networks. In the proposed method, the cluster and member nodes perform channel-based spectrum sensing. After sensing, the cluster head transmits a system activation signal through its available channels with a predetermined angle difference pattern. To detect the cluster head's transmission channels and to join the cluster, each member node implements fast Fourier transform (FFT) and computes autocorrelation for the angle difference sequence of the received signal patterns. This is compared to the predetermined reference angle difference pattern. The join-request and channel-decision procedures are presented in this paper. Performance evaluation of the proposed method is presented in the simulation results.

Keywords

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