Optimal Relay Selection for Physical-Layer Security in Cooperative Wireless Networks

By Yulong Zou, Xianbin Wang, Weiming Shen. IEEE Journal on Selected Areas in Communications, 2013

549 citations recorded by the source corpus.

In this paper, we explore the physical-layer security in cooperative wireless networks with multiple relays where both amplify-and-forward (AF) and decode-and-forward (DF) protocols are considered. We propose the AF and DF based optimal relay selection (i.e., AFbORS and DFbORS) schemes to improve the wireless security against eavesdropping attack. For the purpose of comparison, we examine the traditional AFbORS and DFbORS schemes, denoted by T-AFbORS and T-DFbORS, respectively. We also investigate a so-called multiple relay combining (MRC) framework and present the traditional AF and DF based MRC schemes, called T-AFbMRC and T-DFbMRC, where multiple relays participate in forwarding the source signal to destination which then combines its received signals from the multiple relays. We derive closed-form intercept probability expressions of the proposed AFbORS and DFbORS (i.e., P-AFbORS and P-DFbORS) as well as the T-AFbORS, T-DFbORS, T-AFbMRC and T-DFbMRC schemes in the presence of eavesdropping attack. We further conduct an asymptotic intercept probability analysis to evaluate the diversity order performance of relay selection schemes and show that no matter which relaying protocol is considered (i.e., AF and DF), the traditional and proposed optimal relay selection approaches both achieve the diversity order M where M represents the number of relays. In addition, numerical results show that for both AF and DF protocols, the intercept probability performance of proposed optimal relay selection is strictly better than that of the traditional relay selection and multiple relay combining methods.

Subfields: Computer Networks and Communications, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/393c2dc4ce3f228a184e5b0fbe2dd17c12fa4ef9

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Computer Networks and Communications

1. Hsiao-Hwa Chen
2. Xianbin Wang
3. Lajos Hanzo
4. Yulong Zou
5. Yiliang Liu
6. Liangmin Wang
7. A. Mukherjee
8. Jia Zhu

In Electrical and Electronic Engineering

1. Hsiao-Hwa Chen
2. Xianbin Wang
3. Lajos Hanzo
4. Yulong Zou
5. Yiliang Liu
6. Liangmin Wang
7. A. Mukherjee
8. Jia Zhu

Citations in the corpus

• Principles of Physical Layer Security in Multiuser Wireless Networks: A Survey (2010, background): “A more general scenario was considered in [156] for AF and DF relays, with single and multiple relay selection schemes and corresponding diversity orders being presented.”
• Secure Transmission in Cognitive Satellite Terrestrial Networks (2016, background): “Reference [11] explored the PLS in cooperative wireless networks with optimal relay selection.”
• Physical Layer Security for Next Generation Wireless Networks: Theories, Technologies, and Challenges (2017, background): “To take full advantage of multiple relays, [84], [85] proposed a joint relay and jammer selection scheme to select two or three intermediate nodes to enhance security against Eve.”
• A Survey on Wireless Security: Technical Challenges, Recent Advances, and Future Trends (2015, methodology): “In order to improve the attainabl e transmission security, it is of importance to increase the secrecy capacity by exploiting sophisticated signal proce ssing techniques, such as the artificial noise aided security [37] -[ 9], security-oriented beamforming [40], [41], security-orie nt d diversity ap”