KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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Secondary System Initialization Protocol Using FFT-based Correlation Matching for Cognitive Radio Ad-hoc Networks

  • Yoo, Sang-Jo (School of Information and Communication Engineering, Inha University) ;
  • Jang, Ju-Tae (School of Information and Communication Engineering, Inha University) ;
  • Seo, Myunghwan (TICN R&D Center Hanwha Thales Co., Ltd.) ;
  • Cho, Hyung-Weon (TICN R&D Center Hanwha Thales Co., Ltd.)
  • Received : 2016.05.29
  • Accepted : 2016.10.17
  • Published : 2017.01.31
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Abstract

Due to the increasing demand for spectrum resources, cognitive radio networks and dynamic spectrum access draw a lot of research into efficiently utilizing limited spectrum resources. To set up cluster-based CR ad-hoc common channels, conventional methods require a relatively long time to successfully exchange the initialization messages. In this paper, we propose a fast and reliable common channel initialization protocol for CR ad-hoc networks. In the proposed method, the cluster head sequentially broadcasts a system activation signal through its available channels with a predetermined correlation pattern. To detect the cluster head's broadcasting channels and to join the cluster, each member node implements fast Fourier transform (FFT) and computes autocorrelation of an FFT bin sequence for each available channel of the member node. This is compared to the predetermined reference pattern. The join request and channel decision procedures are also presented in this paper. In a simulation study, the performance of the proposed method is evaluated.

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References

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