# Adaptive Release Duration Modulation for Limited Molecule Production and Storage

## TL;DR

This paper proposes an adaptive modulation scheme for molecular communication systems that optimizes release duration to improve transmission reliability despite transmitter limitations.

## Contribution

It introduces an adaptive release duration modulation method that accounts for molecule production and storage constraints, optimizing transmission performance.

## Key findings

- The proposed scheme reduces the probability of error in molecular communication.
- Optimal release durations are characterized and used to derive performance bounds.
- Adaptive modulation improves system robustness under transmitter limitations.

## Abstract

The nature of molecular transmitter imposes some limitations on the molecule production process and its storage. As the molecules act the role of the information carriers, the limitations affect the transmission process and the system performance considerably. In this paper, we focus on the transmitter's limitations, in particular, the limited molecule production rate and the finite storage capacity. We consider a time-slotted communication where the transmitter opens its outlets and releases the stored molecules for a specific time duration to send bit "1" and remains silent to send bit "0". By changing the release duration, we propose an adaptive release duration modulation. The objective is to find the optimal transmission release duration to minimize the probability of error. We characterize the properties of the optimal release duration and use it to derive upper and lower bounds on the system performance. We see that the proposed modulation scheme improves the performance.