Table of Contents
International Journal of Vehicular Technology
Volume 2012, Article ID 492105, 8 pages
http://dx.doi.org/10.1155/2012/492105
Research Article

A Semi-Deterministic Channel Model for VANETs Simulations

1Laboratoire XLIM-SIC, UMR CNRS 6172, Université de Poitiers, 86034 Poitiers, France
2Laboratoire MIPS-GRTC, Université de Haute Alsace, 68000 Colmar, France

Received 15 October 2010; Revised 24 May 2011; Accepted 2 June 2011

Academic Editor: Athanasios Panagopoulos

Copyright © 2012 Jonathan Ledy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Today's advanced simulators facilitate thorough studies on Vehicular Ad hoc NETworks (VANETs). However the choice of the physical layer model in such simulators is a crucial issue that impacts the results. A solution to this challenge might be found with a hybrid model. In this paper, we propose a semi-deterministic channel propagation model for VANETs called UM-CRT. It is based on CRT (Communication Ray Tracer) and SCME—UM (Spatial Channel Model Extended—Urban Micro) which are, respectively, a deterministic channel simulator and a statistical channel model. It uses a process which adjusts the statistical model using relevant parameters obtained from the deterministic simulator. To evaluate realistic VANET transmissions, we have integrated our hybrid model in fully compliant 802.11 p and 802.11 n physical layers. This framework is then used with the NS-2 network simulator. Our simulation results show that UM-CRT is adapted for VANETs simulations in urban areas as it gives a good approximation of realistic channel propagation mechanisms while improving significantly simulation time.