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Robust layout optimization for intelligent reflecting surfaces-based visible light communication systems.

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    This study introduces a robust layout optimization for intelligent reflective surface (IRS) visible light communication (VLC) systems to overcome signal blockage. The proposed rectangle layout enhances reliability and data rates in challenging environments.

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    Area of Science:

    • Wireless communication
    • Optical networking
    • Signal processing

    Background:

    • Visible light communication (VLC) faces reliability challenges due to signal blockage by obstacles.
    • Intelligent Reflective Surfaces (IRS) can mitigate blockage but introduce complexity in system design.
    • Coexistence of access points (APs), IRSs, and obstacles necessitates advanced shadow analysis.

    Purpose of the Study:

    • To propose a robust layout optimization scheme for IRS-VLC systems to resist blockages.
    • To enhance system reliability and performance in the presence of random obstructions.
    • To balance consistent illumination and achievable data rate (ADR) through optimized configurations.

    Main Methods:

    • Modeling random obstructions using spatial geometry.
    • Developing an optimization problem considering AP positions and IRS array directions.
    • Employing the non-dominated sorting genetic algorithm-II (NSGA-II) for anti-occlusion.
    • Utilizing enhanced selection functions (ASFs) to select the optimal solution from the Pareto front.

    Main Results:

    • The proposed scheme effectively improves performance in IRS-VLC systems.
    • Simulation results validate the robustness of the layout optimization against blockages.
    • The rectangle layout demonstrates superior performance compared to traditional layouts in IRS-VLC systems.

    Conclusions:

    • The developed robust layout optimization scheme significantly enhances IRS-VLC system reliability.
    • The integration of spatial geometry, NSGA-II, and ASFs provides an effective solution for blockage mitigation.
    • Strategic layout design, particularly the rectangle configuration, is crucial for optimizing IRS-VLC performance.