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

Abstract

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 strategies, namely randomize-and-forward and decodeand-forward 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.

Power Allocation and Mode Selection in Unmanned Aerial Vehicle Relay Based Wireless Networks

“…In UAV aided communications, FD and/or hybrid mode may offer a suitable way for relieving the capacity limit of the existing HD mode UAV aided systems [6]. So far, hybrid HD/FD mode selection techniques have been investigated in several scenarios, including multi-input multi-output (MIMO) [25], heterogeneous network [26], femtocell network [27], security-ganrantee systems [28], buffer aided systems [29], and energy harvesting systems [30], etc.…”

Full-Duplex Small-Cell Networks: A Physical-Layer Security Perspective

“…In [33], the authors proposed a new solution for improving the PHY-layer security performance using FD transceivers which perform joint reception and jamming. The work in [33], as well as other related papers such as [34]- [36], consider a deterministic single-cell setup. In addition, the recent works in [37] and [38] study the PHY-layer security performance in the context of FD-enabled wireless ad hoc networks.…”

Secrecy Rate Maximization With Outage Constraint in Multihop Relaying Networks

“…The authors in [8] studied the problem of secure connectivity for randomize-and-forward (RaF) relaying strategy in cooperative wireless networks. The authors in [9] and [10] investigated the physical layer security of a buffer-aided half-duplex (HD) and full-duplex (FD) RaF relaying wireless network, respectively. Only a few attempts have addressed this problem in multihop relaying networks.…”