Fast simulation of interacting carriers in nanosimulators

Diffusion-based molecular communication (DMC) with interacting carrier molecules allow to explore a variety of new communication paradigms. However, simulating these interactions on a network scale is hard from an analytic point of view, and a computationally challenging task which may easily become a bottleneck. This paper studies different techniques that allow to detect which particles are interacting. Recursive and hierarchical grid based approaches are proposed and a multithreaded CPU and GPU implementation respectively are evaluated and compared to a state-of-the-art collision detection library and nanosimulator.