Diffusive Molecular Communication in Biological Cylindrical Environment
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Diffusive molecular communication (DMC) is one of the most promising approaches for realizing nano-scale communications for healthcare applications. In in-vivo environment, DMC system faces bounded biological spaces. Inspired by the blood vessels in the body, a DMC system in a biological cylindrical environment is considered whose boundary is covered by the receptor proteins and information molecules in fluid medium are subject to degradation. Assuming flow with constant velocity, concentration Green's function of diffusion is analytically derived which takes into account asymmetry in all radial, axial and azimuthal coordinates. Employing obtained Green's function, information channel between an arbitrary transmitter and transparent receiver nanomachine is fully characterized. To evaluate the DMC system in the biological cylinder, a simple on-off keying modulation scheme is adopted and corresponding error probability is derived.
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