Active versus Passive: Receiver Model Transforms for Diffusive Molecular Communication

Abstract

This paper presents an analytical comparison of active and passive receiver models in diffusive molecular communication. In the active model, molecules are absorbed when they collide with the receiver surface. In the passive model, the receiver is a virtual boundary that does not affect molecule behavior. Two approaches are presented to derive transforms between the receiver signals. As an example, two models for an unbounded diffusion-only molecular communication system with a spherical receiver are unified. As time increases in the three-dimensional system, the transform functions have constant scaling factors, such that the receiver models are effectively equivalent. Methods are presented to enable the transformation of stochastic simulations, which are used to verify the transforms and demonstrate that transforming the simulation of a passive receiver can be more efficient and more accurate than the direct simulation of an absorbing receiver.

Simulating with AcCoRD: Actor-based Communication via Reaction–Diffusion

“…These videos are also summarized in Appendix E. Generally, we have avoided focusing on results that we have already presented in preliminary work with earlier versions of AcCoRD. These earlier results include a study on the choice of statistical distribution to describe the number of observed molecules in [26], a demonstration of a system with a large number of molecule sources in [63], a study on the accuracy of the assumption that a transmitter is a point source in [25], and a direct comparison between passive and absorbing receivers in [64]. The reader may refer to these earlier works for results from those specific scenarios.…”

Novel frequency domain equalization with threshold for molecular communication

“…A point source transmitter releases N molecules in all directions into an unlimited single dimension (1D) environment with constant temperature since a point segment reception in the receiver is assumed [2,7]. The released molecules are initially distributed uniformly throughout the surroundings.…”

“…These molecules are released to the surrounding medium, where they diffuse according to Brownian motion and arrive at the receiver [2]. These particles are detected by a receiver that has a radius of r RX and is placed at a distance of d from the center of the transmitter [7].…”

“…considering time period of molecule release is negligibly small). The channel impulse response for a point transmitter is presented below [7].…”

Signal Detection for Molecular MIMO Communications With Asymmetrical Topology

“…Moreover, in [26], planar laser induced fluorescence and high-speed cameras are used to obtain the information strength at the reception side without influencing the propagation of molecules. So in this paper, we assume that all the reception antennas have spherical shapes with radius r and are considered as "passive" antennas which can count the number of the molecules without influencing the motion of them [27]- [30]. Thus, the CIR, i.e., the probability of observing molecule in the jth reception antenna of the receiver in response to one molecule's input from the ith transmission antenna can be given by [28] h…”