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Threefold layered optical wireless network: illumination, communication, and positioning.

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    Visible light communication (VLC) networks integrate illumination, communication, and high-accuracy indoor positioning. This study optimizes LED usage for these combined tasks, minimizing hardware while meeting performance goals.

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    Area of Science:

    • Optoelectronics
    • Wireless Communication
    • Indoor Positioning Systems

    Background:

    • Visible light communication (VLC) offers high bandwidth and data rates, complementing radio frequency technology.
    • VLC enables simultaneous illumination and communication, presenting a green technology solution.
    • The high bandwidth of VLC facilitates precise indoor localization with sub-meter accuracy.

    Purpose of the Study:

    • To investigate a VLC network for integrated indoor illumination, communication, and positioning.
    • To present optimization problems for minimizing the number of white LEDs required for these tasks.
    • To analyze the performance of different LED types for specific functions (illumination, communication, positioning).

    Main Methods:

    • Formulating three distinct optimization problems based on illumination, data rate, and localization accuracy constraints.
    • Considering traditional white LEDs and specialized LEDs for localization-only or communication-only.
    • Employing extensive simulations to validate the proposed optimization solutions.

    Main Results:

    • Demonstrated that optimized LED deployment can achieve integrated illumination, communication, and positioning.
    • Showcased different optimization strategies for varied LED types and task requirements.
    • Simulation results confirmed the effectiveness of the proposed approaches for VLC network design.

    Conclusions:

    • VLC networks can effectively provide combined illumination, communication, and precise indoor positioning.
    • Optimizing LED selection and placement is crucial for efficient integrated VLC systems.
    • The study provides a framework for designing advanced VLC networks tailored to specific indoor application needs.