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Secrecy performance analysis of amplify-and-forward cooperative network with relay selection in the presence of multiple eavesdroppers

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Abstract

The use of wireless transmission networks in various environments has become widespread. One of the main challenges in wireless networks is that the wireless transmission is highly vulnerable to eavesdropping attacks. In this paper, an amplify-and-forward cooperative relaying wireless system with relay selection is considered to improve the physical layer (PHY) security of the wireless system in the presence of multiple eavesdroppers, under two cases, namely, perfect channel state information (CSI) and outdated CSI cases. To evaluate the PHY security of the system, we derive closed-form expressions for the PHY security performance metrics, including the probability of non-zero secrecy capacity, the average secrecy capacity, and the secrecy outage probability. Then using those expressions, we obtain several numerical results under system parameters. The results show that relay selection provides significant improvement in the PHY security of the system. Moreover, it is observed that, when the CSI used to select the best relay is outdated, the PHY secrecy performance is relatively inferior compared to that of the perfect CSI case. Finally, the obtained mathematical expressions are also validated using Monte-Carlo simulation.

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Authors and Affiliations

  1. School of Electrical Engineering and Computer Science, Washington State University, Pullman, WA, USA

    Mohammad Torabi

  2. Cyberspace Research Institute, Shahid Beheshti University, Tehran, Iran

    Sahar Parkouk & Saeed Shokrollahi

Authors
  1. Mohammad Torabi
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  2. Sahar Parkouk
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  3. Saeed Shokrollahi
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Correspondence to Mohammad Torabi.

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Torabi, M., Parkouk, S. & Shokrollahi, S. Secrecy performance analysis of amplify-and-forward cooperative network with relay selection in the presence of multiple eavesdroppers. Wireless Netw 27, 2977–2990 (2021). https://doi.org/10.1007/s11276-021-02611-4

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  • DOI: https://doi.org/10.1007/s11276-021-02611-4

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