Interference Alignment Using Reaction in Molecular Interference Channels

TL;DR

This paper introduces a novel interference alignment scheme for molecular communication channels that leverages molecular reactions and timing strategies to mitigate co-channel interference and improve error performance.

Contribution

It proposes a new IA scheme based on releasing and sampling times combined with molecular reactions, addressing signal-dependent noise in MC systems.

Findings

The proposed scheme effectively cancels interference signals.

It significantly reduces error rates in molecular interference channels.

The feasible timing region for the scheme is characterized.

Abstract

Co-channel interference (CCI) is a performance limiting factor in molecular communication (MC) systems with shared medium. Interference alignment (IA) is a promising scheme to mitigate CCI in traditional communication systems. Due to the signal-dependent noise in MC systems, the traditional IA schemes are less useful in MC systems. In this paper, we propose a novel IA scheme in molecular interference channels (IFCs), based on the choice of releasing/sampling times. To cancel the aligned interference signals and reduce the signal dependent noise, we use molecular reaction in the proposed IA scheme. We obtain the feasible region for the releasing/sampling times in the proposed scheme. Further, we investigate the error performance of the proposed scheme. Our results show that the proposed IA scheme using reaction improves the performance significantly.\blfootnote{This work was supported in part by the Iran National Science Foundation (INSF) Research Grant on Nano-Network Communications and in part by the Research Center of Sharif University of Technology.