Simulation-based Evaluation of the Diffusion-based Physical Channel in Molecular Nanonetworks

Abstract—Nanonetworking is an emerging field of research, where nanotechnology and communication engineering are ap-plied on a common ground. Molecular Communication (MC) is a bio-inspired paradigm, where Nanonetworks, i.e., the intercon-nection of devices at the nanoscale, are based on the exchange of molecules. Amongst others, diffusion-based MC is expected to be suitable for covering short distances (nm-µm). In this work, we explore the main characteristics of diffusion-based MC through the use of NanoSim, a physical simulation framework for MC. NanoSim allows for the simulation of the physics underlying the diffusion of molecules for different scenarios. Through the NanoSim results, the Linear Time Invariant (LTI) property is proven to be a valid assumption for the free diffusion-based MC scenario. Moreover, diffusion-based noise is observed and evaluated with reference to already proposed stochastic models. The optimal pulse shape for diffusion-based MC is provided as a result of simulations. Two different pulse-based coding techniques are also compared through NanoSim in terms of available bandwidth and energy consumption for communication. I