Secure communication design for multi-user peer-to-peer wireless relay networks

In this study, physical layer security techniques are studied for multi-user peer-to-peer relay networks using amplify-and-forward protocol in the presence of an eavesdropper. Two system designs are considered: the minimum achievable secrecy rate maximisation and the total transmit power minimisatio...

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Veröffentlicht in:	IET communications Jg. 10; H. 7; S. 770 - 777
Hauptverfasser:	Gong, Xiangwu, Long, Hang, Dong, Feihong, Yin, Hao
Format:	Journal Article
Sprache:	Englisch
Veröffentlicht:	The Institution of Engineering and Technology 05.05.2016
Schlagworte:	Algorithms amplify and forward communication amplify‐and‐forward protocol computer network security concave programming convex problem convex programming Design engineering gradient methods gradient‐based algorithm mathematical analysis max‐min achievable secrecy rate problem minimax techniques minimisation multiuser peer‐to‐peer wireless relay network nonconvex optimisation problem nonlinear optimisation problem nonlinear programming numerical evaluation Optimization peer‐to‐peer computing physical layer security technique polynomial time algorithm Polynomials power minimisation problem protocols radio networks relaxation technique relaxation theory Relay networks relay networks (telecommunication) secrecy rate maximisation secure wireless communication design Social networks Systems design total power optimisation problem Wireless communication radio networks nonlinear programming secrecy rate maximisation amplify-and-forward protocol minimax techniques amplify and forward communication power minimisation problem nonconvex optimisation problem relaxation technique physical layer security technique total power optimisation problem gradient-based algorithm relaxation theory protocols gradient methods concave programming relay networks (telecommunication) multiuser peer-to-peer wireless relay network peer-to-peer computing polynomials max-min achievable secrecy rate problem convex programming mathematical analysis secure wireless communication design polynomial time algorithm computer network security nonlinear optimisation problem convex problem numerical evaluation minimisation
ISSN:	1751-8628, 1751-8636
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Zusammenfassung:	In this study, physical layer security techniques are studied for multi-user peer-to-peer relay networks using amplify-and-forward protocol in the presence of an eavesdropper. Two system designs are considered: the minimum achievable secrecy rate maximisation and the total transmit power minimisation. First, considering user fairness, the authors study the max–min achievable secrecy rate problem subject to a total transmit power constraint. Mathematically, the optimisation problem is non-linear and non-convex. They propose a polynomial time algorithm based on the bisection technique to solve it. Second, they study the total transmit power minimisation problem which aims at minimising the total transmit power at relays such that individual secrecy rate for each user is satisfied. The total power optimisation problem is also non-convex, so they use the relaxation technique to transform it into a convex problem which can be efficiently solved by the gradient-based algorithms. Numerical evaluation of the obtained secrecy rate and transmit power results shows that the proposed designs can significantly improve the performance of secure wireless communications.
Bibliographie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1751-8628 1751-8636
DOI:	10.1049/iet-com.2015.0609