Physical-Layer Security of a Buffer-Aided Full-Duplex Relaying System

Ahmed El Shafie, Ahmed Sultan Salem, Naofal Al-Dhahir

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


This letter proposes a novel hybrid half-/full-duplex relaying scheme to enhance the relay channel security. A source node (Alice) communicates with her destination node (Bob) in the presence of a buffer-aided full-duplex relay node (Rooney) and a potential eavesdropper (Eve). Rooney adopts two different relaying, namely randomize-and-forward and decode-andforward relaying strategies, to improve the security of the legitimate system. In the first relaying strategy, Rooney uses a codebook different from that used at Alice. In the second relaying strategy, Rooney and Alice use the same codebooks. In addition, Rooney switches between half-duplex and full-duplex modes to further enhance the security of the legitimate system. The numerical results demonstrate that our proposed scheme achieves a significant average secrecy end-to-end throughput improvement relative to the conventional bufferless full-duplex relaying scheme.
Original languageEnglish (US)
Pages (from-to)1856-1859
Number of pages4
JournalIEEE Communications Letters
Issue number9
StatePublished - Jul 7 2016


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