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Wireless Communications and Mobile Computing
Volume 2018, Article ID 5457176, 15 pages
Research Article

Reliability-Security Trade-Off Analysis of Cognitive Radio Networks with Jamming and Licensed Interference

Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam

Correspondence should be addressed to Khuong Ho-Van; ac.oohay@navoh.gnouhk

Received 26 July 2017; Revised 20 November 2017; Accepted 13 December 2017; Published 22 January 2018

Academic Editor: Donatella Darsena

Copyright © 2018 Khuong Ho-Van and Thiem Do-Dac. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Cognitive radio networks (CRNs) allow coexistence of unlicensed users (UUs) and licensed users (LUs) and hence, mutual interference between UUs and LUs is neither ignored nor considered as Gaussian-distributed quantity. Additionally, exploiting jamming signals to purposely interfere with signal reception of eavesdroppers is a feasible solution to improve security performance of CRNs. This paper analyzes reliability-security trade-off, which accounts for maximum transmit power constraint, interference power constraint, jamming signal, and Rayleigh fading, and considers interference from LUs as non-Gaussian-distributed quantity. Toward this end, exact closed-form expressions of successful detection probability and successful eavesdropping probability, from which reliability-security trade-off is straightforwardly visible, are first suggested and then validated by Monte-Carlo simulations. Various results demonstrate that interference from LUs considerably decreases both probabilities while jamming signal enlarges the difference between them, emphasizing its effectiveness in improving security performance.