Physical-Layer Security for Indoor Hybrid PLC/VLC Networks With NOMA

Abstract

Hybrid power line communication (PLC) / visible light communication (VLC) networks have been demonstrated to be crucial for indoor practical communications and have attracted widespread attention. However, most current research in hybrid PLC/VLC networks focus mainly on communication reliability and resource allocation, and little has been carried on physical layer security. In this paper, we investigate the secure communication of a hybrid PLC/VLC network with two non-orthogonal multiple access legitimate users. During the two-hop PLC and VLC transmission, two eavesdroppers attempt to wiretap the confidential information from the PLC link via power line, and from the VLC link via visible light, respectively. Based on the randomness of the impulsive noise arriving at the PLC link, and the randomness of users' positions covered by the VLC link, the channel statistical characteristics of the PLC and VLC links are derived, respectively. Furthermore, the approximate closed-form expressions of secrecy outage probability (SOP) are determined. Simulations are performed to validate the effectiveness of theoretical results, and simulation results show that to get a high-level secrecy outage performance, the parameters of both the PLC and VLC links should be jointly designed. Furthermore, with regard to SOP, it is the worst case for both the PLC and VLC links eavesdropping, as compared to only PLC link eavesdropping or only VLC link eavesdropping.

Unmanned Aerial Vehicle-Assisted Terahertz–Visible Light Communication Systems: An In-Depth Performance Analysis

“…The integration with the TCP/IP model was facilitated through software written in Python, and Universal Software Radio Peripheral (USRP) software was used to define radio platforms with the GNU radio program for physical layer implementation. The experimental setup included a PLC link, a VLC downlink, and an IR uplink, showcasing the feasibility and performance of the hybrid communication system in indoor environments.The authors in [12] investigated the physical layer security of hybrid PLC and VLC networks, addressing a gap in the current research, which had previously largely focused on communication reliability and resource allocation. The study examined secure communication in a two-hop PLC/VLC network with two legitimate users employing non-orthogonal multiple access (NOMA), and considered the threats posed by eavesdroppers on both the PLC and VLC links.…”