Uma Nova Abordagem Paralela para Técnicas de Traçado de Raios 3D Aplicadas na Predição de Rádio Propagação (A New Parallel Approach for 3D Ray-Tracing Techniques in the Radio Propagation Prediction)

André Mendes Cavalcante (amc@ufpa.br), Marco José de Sousa (marcojs@ufpa.br), João Crisóstomo Weyl Albuquerque Costa (jweyl@ufpa.br), Carlos Renato Lisboa Francês (rfrances@ufpa.br), Gervásio Protásio dos Santos Cavalcante (gervasio@ufpa.br)


Universidade Federal do Pará
This paper appears in: Revista IEEE América Latina

Publication Date: Sept. 2007
Volume: 5,   Issue: 5 
ISSN: 1548-0992


Abstract:
A new computational parallel model based on 3D ray-tracing for radio propagation prediction is presented. This approach considers that the main tasks in a 3D ray-tracing technique can be evaluated in an independent and/or parallel way. The workload distribution among the participant nodes of the parallel architecture (cluster of PC's) is performed through a random assignment of the initial rays and the field points for them. Simulations are realized in order to validate and evaluate the performance of the proposed model. The presented results show that the scalability of the model is obtained naturally due to independence of the involved processes. The efficiency of the model presents behavior above the ideal for cases with ostensible processing of rays. These characteristics favor to the increase of the prediction precision through the increase of the density of launched rays and the possibility of incorporation of new propagation mechanisms.

Index Terms:
Parallel processing, Radio propagation, Ray tracing.   


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