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Silence-Based Multi-Type Hybrid Transmission Scheme for Mobile Molecular Communication System.

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    This study introduces a novel hybrid transmission scheme for mobile molecular communication (MC) systems, improving performance in slow diffusive environments. The proposed silence-based scheme demonstrates robust behavior against inter-symbol interference.

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    Area of Science:

    • Biomedical Engineering
    • Communication Systems
    • Nanotechnology

    Background:

    • Mobile molecular communication (MC) systems utilize molecules for information transfer.
    • Heterogeneous media and slow diffusion present challenges in MC system reliability.
    • Nanomachines (NMs) are key components in developing advanced MC systems.

    Purpose of the Study:

    • To develop and analyze a novel transmission scheme for 3D slow diffusive heterogeneous media-based mobile MC systems.
    • To model the time-varying stochastic diffusivity and characterize the mobile MC channel.
    • To derive the average probability of error for the proposed scheme and compare it with existing methods.

    Main Methods:

    • Proposed a time-varying stochastic diffusivity model for MC devices and molecules.
    • Characterized the mobile MC channel using channel impulse response (CIR) and its mean.
    • Developed a silence-based multi-type hybrid transmission scheme combining Communication through Silence (CtS), Molecular Shift Keying (MoSK), and Concentration Shift Keying (CSK).
    • Derived the closed-form expression for the average probability of error.
    • Designed Maximum Likelihood (ML) threshold detectors for the proposed and existing schemes.

    Main Results:

    • The proposed silence-based hybrid transmission scheme significantly outperforms existing schemes in slow diffusive environments.
    • The scheme exhibits robust performance, effectively mitigating inter-symbol interference.
    • Closed-form expressions for the average probability of error were derived and validated.

    Conclusions:

    • The novel silence-based hybrid transmission scheme offers superior performance and robustness for mobile molecular communication systems.
    • The developed stochastic diffusivity model and channel characterization provide valuable insights for future MC system design.
    • This research advances the potential of MC systems in complex, diffusive environments.