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

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.