Autoencoder-based Optimization of Multi-user Molecule Mixture Communication Systems

TL;DR

This paper presents an autoencoder-based approach for optimizing multi-user molecular communication systems, enabling reliable, end-to-end design even with unknown or changing channels, and accounting for user priorities.

Contribution

The paper introduces a novel autoencoder scheme for multi-user molecular communication, improving performance and adaptability over existing methods.

Findings

Lower symbol error rates compared to baseline in single-user scenarios.

Reliable communication in unknown or changing channels.

Ability to prioritize users in multi-access scenarios.

Abstract

In this paper, we introduce an autoencoder (AE)-based scheme for end-to-end optimization of a multi-user molecule mixture communication system. In the proposed scheme, each transmitter leverages an encoder network that maps the user symbol to a molecule mixture. The mixtures then propagate through the channel to the receiver, which samples the channel using a non-linear, cross-reactive sensor array. A decoder network then estimates the symbol transmitted by each user based on the sensor observations. The proposed scheme achieves, for a given signal-to-noise ratio, lower symbol error rates than a baseline scheme from the literature in a single-user setting with full channel state information. We additionally demonstrate that the proposed AE-based scheme allows reliable communication when the channel is unknown or changing. Finally, we show that for multiple access the system can account for different user priorities. In summary, the proposed AE-based scheme enables end-to-end system optimization in complex scenarios unsuitable for analytical treatment and thereby brings molecular communication systems closer to real-world deployment.