Relay Selection for Secure 5G Green Communications

TitleRelay Selection for Secure 5G Green Communications
Publication TypeJournal Article
Year of Publication2015
AuthorsN. Nomikos, A. Nieto, P. Makris, D. N. Skoutas, D. Vouyioukas, P. Rizomiliotis, J. Lopez, and C. Skianis
JournalTelecommunication Systems
Date Published05/2015
PublisherSpringer US
ISSN Number1018-4864
Keywords5G relays, Delay-critical, Power-efficient communications, Relay selection, security

In this article, we present relay selection policies in applications with secrecy requirements which are of interest in the fifth generation (5G) of wireless networks. More specifically, we provide a classification of relays based on their distinct communication attributes, such as processing, multiple antennas, storage, channel estimation, density and security level. In addition, we discuss the level of efficiency exhibited by each relay class, regarding their impact in delay-critical applications and green communications applications, while aiming at a specific security level at the physical layer. Then, relay selection policies are proposed taking into consideration the goals set by each application. Numerical evaluation of the proposed policies in terms of the average secrecy rate, average delay and power reduction show improved performance compared to other state-of-the-art solutions. 

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