4.6 Article

Signal Propagation in Diffusive Molecular Communications Over a Spherical Surface

期刊

IEEE COMMUNICATIONS LETTERS
卷 26, 期 1, 页码 64-68

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2021.3123578

关键词

Monte Carlo methods; Receivers; Transmitters; Mathematical models; Laplace equations; Geometry; Analytical models; Molecular communications; propagation pattern

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Diffusive molecular communications (DMC) rely on the Brownian motion of dedicated molecules to transmit information. This study investigates the directional signal propagation characteristics for a point source on a spherical surface and explores the effects of physical and chemical parameters on signal propagation in DMC channels.
Diffusive molecular communications (DMC) relies on the Brownian motion of dedicated molecules for transmitting information. The signal propagation characteristics in a DMC channel is determined by the geometries of the environment, receiver and the transmitter and their physical and chemical properties, which impose the boundary- and initial conditions on the partial differential equation (PDE) describing the diffusion process. In this work, we investigate the directional signal propagation characteristics for a point source over (or, as a special case, on) a spherical surface, that may be reflective, perfectly absorptive or partially absorptive. We derive the general solution of the PDE for this case, and validate it via particle based simulations. Our results can be employed to determine the signal propagation characteristics in a wide range of practically relevant scenarios, for which we investigate the effect of the system parameters on the directivity of the signal propagation.

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