Optimization Approach for Raytracing Analyses by Smart Minimization of the Modeling Level of Detail

Brian Niehoefer, Sebastian Subik, and Christian Wietfeld

Keywords

raytracing, levelofdetail, satellite simulation, simulative channel model

Abstract

When simulation results should be used for decision support in time-critical emergency scenarios, a trade-off between minimizing the simulation time and maximizing the accuracy of the modeled scenario has to be made. Both factors have a significant influence on the degree of accuracy in the results. In this paper, we describe a simulation set-up for a time-efficient analysis of a common satellite link by extending a given raytracing simulation with a so-called Pre-Evaluation~(PE). It is well known that every surface of an obstacle within a raytracing simulator increases the necessary computing-time of the scenario. The novel process chain starts with the PE, which gives an estimation for the minimal necessary degree of accuracy in modeling, depending on the maximum acceptable simulation error. Therefore, the PE evaluates the influence on radio waves for all obstacles in the receiver's ambience. Afterwards only those models need to be integrated in the analysis, which have a significant effect on the radio propagation. This leads to an optimized simulation processing and to an increase of the usability of the simulation.

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