Channel Characterization and Performance of a 3-D Molecular Communication System with Multiple Fully-Absorbing Receivers

TL;DR

This paper develops an approximate analytical model for molecular communication systems with multiple fully-absorbing receivers, enabling better analysis of complex nanonetworks like MIMO and SIMO configurations.

Contribution

It introduces the first analytical expression for hitting probabilities in multi-FAR systems and applies it to model and analyze a SIMO molecular communication system with cooperative receivers.

Findings

Derived approximate hitting probability expressions for multiple FARs.

Modeled a SIMO system with a circular array of FARs.

Analyzed communication performance under various cooperative schemes.

Abstract

Molecular communication (MC) can enable the transfer of information between nanomachines using molecules as the information carrier. In MC systems, multiple receiver nanomachines often co-exist in the same communication channel to serve common or different purposes. However, the analytical channel model for a system with multiple fully absorbing receivers (FARs) does not exist in the literature, which is significantly different from the single FAR system due to the mutual influence of FARs. The analytical channel model is essential in analyzing systems with multiple FARs, including MIMO, SIMO, and cognitive molecular communication systems. In this work, we derive an approximate analytical expression for the hitting probability of a molecule emitted from a point source on each FAR on a diffusion-based MC system with three or more FARs. Using these expressions, we derive the channel model for a SIMO system with a single transmitter and multiple FARs arranged in a uniform circular array (UCA). We then analyze the communication performance of this SIMO system under different cooperative receiver schemes and develop several interesting insights.