Molecular communications via diffusion (MCvD) systems are easily simulated for micro-scale topologies and applications. On the other hand, due to the high path loss, there is a need for the emission of a very large number of molecules to have a detectable signal for the macro-scale topologies. Therefore, the simulation of macro-scale MCvD systems or applications has its own challenges. In this work, a voxel-based simulator for MCvD is proposed and analyzed. The proposed simulator is able to consider a very large amount of molecules since it does not track every molecule, instead it simulates the aggregate behavior. We assess the correctness of such a simulation approach through comparative studies with a particle-based (i.e., per-molecule) simulation. We present the effect of voxel side-length on the modeling accuracy and devise a framework for selecting the optimal voxel side-length for high-accuracy simulations.

易于通过扩散（MCvD）系统进行分子通讯，以进行微观拓扑和应用的模拟。另一方面，由于高的路径损耗，需要发射大量分子以具有对于宏观拓扑而言可检测的信号。因此，宏观MCvD系统或应用程序的仿真有其自身的挑战。在这项工作中，提出并分析了基于体素的MCvD仿真器。拟议的模拟器能够考虑大量的分子，因为它不会跟踪每个分子，而是模拟聚集行为。我们通过基于粒子（即，每分子）模拟的比较研究，评估了这种模拟方法的正确性。