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Mitigation of Adverse Effects of Malicious Users on Cooperative Spectrum Sensing by Using Hausdorff Distance in Cognitive Radio Networks

Khan, Muhammad Sajjad;Koo, Insoo

  • 투고 : 2015.02.02
  • 심사 : 2015.04.28
  • 발행 : 2015.06.30

초록

In cognitive radios, spectrum sensing plays an important role in accurately detecting the presence or absence of a licensed user. However, the intervention of malicious users (MUs) degrades the performance of spectrum sensing. Such users manipulate the local results and send falsified data to the data fusion center; this process is called spectrum sensing data falsification (SSDF). Thus, MUs degrade the spectrum sensing performance and increase uncertainty issues. In this paper, we propose a method based on the Hausdorff distance and a similarity measure matrix to measure the difference between the normal user evidence and the malicious user evidence. In addition, we use the Dempster-Shafer theory to combine the sets of evidence from each normal user evidence. We compare the proposed method with the k-means and Jaccard distance methods for malicious user detection. Simulation results show that the proposed method is effective against an SSDF attack.

키워드

Cognitive radio;Dempster-Shafer evidence theory;Hausdorff distance;Spectrum sensing data falsification (SSDF)

참고문헌

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과제정보

연구 과제번호 : 자동차·조선 전자융합기술 사업단