Secure Transmission in NOMA-Aided Multiuser Visible Light Communication Broadcasting Network With Cooperative Precoding Design

Shi, Ge; Aboagye, Sylvester; Ngatched, Telex M. N.; Dobre, Octavia A.; Li, Yong; Cheng, Wei

doi:10.1109/tifs.2022.3202693

Cited by 7 publications

(2 citation statements)

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“…Beamforming-based techniques demonstrate superior performance as they enable transmitters to steer the direction of optical signals and adjust their power levels [ 5 , 6 ]. By dynamically controlling these parameters, beamforming-based methods can focus the transmitted light toward specific UEs or areas of interest.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Security in Visible Light Communication: A Tabu-Search-Based Method for Transmitter Selection

Shi,

Cheng,

Gao

et al. 2024

Sensors

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In this paper, we explore the secrecy performance of a visible light communication (VLC) system consisting of distributed light-emitting diodes (LEDs) and multiple users (UEs) randomly positioned within an indoor environment while considering the presence of an eavesdropper. To enhance the confidentiality of the system, we formulate a problem of maximizing the sum secrecy rate for UEs by searching for an optimal LED for each UE. Due to the non-convex and non-continuous nature of this security maximization problem, we propose an LED selection algorithm based on tabu search to avoid getting trapped in local optima and expedite the search process by managing trial vectors from previous iterations. Moreover, we introduce three LED selection strategies with a low computational complexity. The simulation results demonstrate that the proposed algorithm achieves a secrecy performance very close to the global optimal value, with a gap of less than 1%. Additionally, the proposed strategies exhibit a performance gap of 28% compared to the global optimal.

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Section: Introductionmentioning

confidence: 99%

Enhancing Security in Visible Light Communication: A Tabu-Search-Based Method for Transmitter Selection

Shi,

Cheng,

Gao

et al. 2024

Sensors

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“…In order to suppress eavesdropping for a NOMA-VLC system, the authors in [25] investigated the minimum feasible power allocated to a pseudo user through three power allocation methods (GRPA, FPA, and modified FPA), and the secrecy sum rate and user fairness were analyzed for both perfect successive interference cancellation (SIC) and imperfect SIC. For a VLC system with multiple LED arrays and multiple NOMA users [26], cooperative precoding was utilized to maximize the sum secrecy rate. The PLS of multiple users in an intelligent reflecting surface-aided VLC system was investigated in [27].…”

Section: Introductionmentioning

confidence: 99%

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

Zhao,

Huang

et al. 2024

IEEE Open J. Commun. Soc.

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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.

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