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History based forward and feedback mechanism in cooperative spectrum sensing including malicious users in cognitive radio network

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  • Noor Gul
  • Ijaz Mansoor Qureshi
  • Adnan Omar
  • Atif Elahi
  • Sajjad Khan

Abstract

In cognitive radio communication, spectrum sensing plays a vital role in sensing the existence of the primary user (PU). The sensing performance is badly affected by fading and shadowing in case of single secondary user(SU). To overcome this issue, cooperative spectrum sensing (CSS) is proposed. Although the reliability of the system is improved with cooperation but existence of malicious user (MU) in the CSS deteriorates the performance. In this work, we consider the Kullback-Leibler (KL) divergence method for minimizing spectrum sensing data falsification (SSDF) attack. In the proposed CSS scheme, each SU reports the fusion center(FC) about the availability of PU and also keeps the same evidence in its local database. Based on the KL divergence value, if the FC acknowledges the user as normal, then the user will send unified energy information to the FC based on its current and previous sensed results. This method keeps the probability of detection high and energy optimum, thus providing an improvement in performance of the system. Simulation results show that the proposed KL divergence method has performed better than the existing equal gain combination (EGC), maximum gain combination (MGC) and simple KL divergence schemes in the presence of MUs.

Suggested Citation

  • Noor Gul & Ijaz Mansoor Qureshi & Adnan Omar & Atif Elahi & Sajjad Khan, 2017. "History based forward and feedback mechanism in cooperative spectrum sensing including malicious users in cognitive radio network," PLOS ONE, Public Library of Science, vol. 12(8), pages 1-21, August.
    • Handle: RePEc:plo:pone00:0183387
    DOI: 10.1371/journal.pone.0183387
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    References listed on IDEAS

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    1. Linbo Zhai & Hua Wang & Chuangen Gao, 2016. "A Spectrum Access Based on Quality of Service (QoS) in Cognitive Radio Networks," PLOS ONE, Public Library of Science, vol. 11(5), pages 1-8, May.
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