Molecular Communication: The First Arrival Position Channel

What is it about?

In this letter, we consider a molecular communication channel where the fluid medium has a constant drift from the transmitter toward the receiver and the information to be transmitted is the release position of the information molecules. We use the Green's function formulation and the method of images to derive the first arrival position density of the molecule at the receiver plane.

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Why is it important?

For a diffusion-based MC in 2 or 3-dimensional space, apart from the first arrival time, there is another important information that can be used to design an MC system: the first arrival position (FAP). This information can also be used along with the first arrival time to introduce diversity in the design of the MC channel.