The limited storage capacity at the transmitters of a molecular communication (MC) system can affect the system’s performance. One of the reasons for this limitation is the size restriction of the transmitter, which the storage must be replenished so that the transmitter has enough molecules for future transmission. This paper proposes a biologically inspired transmitter model based on neurons for MC whose storage charging and discharging follow differential equations. The proposed transmitter opens its outlet for a specific time in each time frame to exponentially release a portion of stored molecules to code bit-1 and remains silent to code bit-0. We analyze our model based on different transmission parameters. These parameters are the symbol duration, the release time duration, the storage capacity, and the release and replenishment rate of the storage. We find that the storage outlet must be open for a certain period within the time slot duration in order to improve the performance of the proposed system. Additionally, we demonstrate that determining the effect of storage capacity size can be important for practical MC due to the significant differences between the ideal transmitter and the proposed one, which have a limited size. We show that increases in the transmitter storage size can improve the system performance. As a result, taking a closer look at these practical transmitters is essential to solving the problems and challenges of molecular communication systems.

中文翻译：

---

有限容量存储体系中的分子通信发射机设计


分子通信 (MC) 系统发射器的有限存储容量会影响系统的性能。这种限制的原因之一是发射器的尺寸限制，必须补充存储，以便发射器有足够的分子用于将来的传输。本文提出了一种基于生物启发的MC神经元发射器模型，其存储充电和放电遵循微分方程。所提出的发射器在每个时间帧中的特定时间打开其出口，以指数方式释放一部分存储的分子以编码比特1，并保持沉默以编码比特0。我们根据不同的传输参数分析我们的模型。这些参数是符号持续时间、释放持续时间、存储容量以及存储的释放和补充速率。我们发现存储出口必须在时隙持续时间内打开一定时间，才能提高所提出系统的性能。此外，我们还证明了确定存储容量大小的影响对于实际的 MC 非常重要，因为理想的发射机与建议的发射机之间存在显着差异，而建议的发射机的尺寸有限。我们表明，增加发射机存储大小可以提高系统性能。因此，仔细研究这些实用的发射器对于解决分子通信系统的问题和挑战至关重要。