An efficient ray-tracing acceleration technique for mobile receivers in urban environments

An Efficient Ray Validation Technique for Ray-Tracing in Urban Microcellular Environments

“…Previous works by the authors have presented efficient pre-processing techniques including image polygons mapping for mobile receivers [16,17], intravisibility matrix to readily compute image-tree for mobile transmitter [18], and visibility matching technique to reduce the image-tree in vehicular scenarios [19]. The methods presented in previous works are able to reduce the size of the image-tree or decrease the time it takes to compute it, but they still require that each image in the image-tree be tested for ray validation, which can be computationally intensive for dense urban environments.…”

“…The proposed model thus complements the existing techniques as it addresses the specific issue of computational overhead during the ray validation step, which is a key bottleneck in image-based ray-tracing models. By incorporating the proposed technique into previous works [16][17][18][19], the computational complexity in radio channel modeling for both cellular and vehicular radio networks can be further reduced. Please note that while the proposed model can be used to speed up ray-tracing computations in both rural and urban areas, it is more effective in urban microcellular environments where a large number of higher-order wall reflection and vertical edge diffraction rays exist and may significantly affect received power.…”