An Efficient Pre-Processing Method for 6G Dynamic Ray-Tracing Channel Modeling

TL;DR

This paper introduces a pre-processing technique for dynamic ray-tracing in 6G channel modeling that significantly reduces computational complexity in high-mobility scenarios without sacrificing accuracy.

Contribution

It proposes a novel pre-processing approach that uses an inter-visibility matrix to improve efficiency in 3D dynamic ray-tracing for urban channel modeling.

Findings

Significant time savings compared to traditional methods

Maintains high accuracy in channel characteristic computation

Channel results match measurement data

Abstract

The ray-tracing is often employed in urban areas for channel modeling with high accuracy but encounters a substantial computational complexity for high mobility scenarios. In this paper, we propose a novel pre-processing method for dynamic ray-tracing to reduce the computational burden in high-mobility scenarios by prepending the intersection judgment to the pre-processing stage. The proposed method generates an inter-visibility matrix that establishes visibility relationships among static objects in the environment considering the intersection judgment. Moreover, the inter-visibility matrix can be employed to create the inter-visibility table for mobile transmitters and receivers, which can improve the efficiency of constructing an image tree for the three-dimensional (3D) dynamic ray-tracing method. The results show that the proposed pre-processing method in dynamic ray-tracing has considerable time-saving compared with the traditional method while maintaining the same accuracy. The channel characteristics computed by the proposed method can well match to the channel measurements.