  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.
