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2011 IEEE 36th Conference on Local Computer Networks (2011)
Bonn
Oct. 4, 2011 to Oct. 7, 2011
ISSN: 0742-1303
ISBN: 978-1-61284-926-3
pp: 85-92
Saeed Bastani , School of Information Technologies, University of Sydney, NSW, Australia
Bjorn Landfeldt , School of Information Technologies, University of Sydney, NSW, Australia
Lavy Libman , School of Information Technologies, University of Sydney, NSW, Australia
ABSTRACT
Vehicular traffic density is a key factor in determining the behaviour of radio overlapping and thus impacts performance of data and safety message communication in Vehicular Ad hoc Networks (VANETs). In this paper, we propose a novel density model for urban traffic systems and employ this model for the purpose of spatial-temporal analysis of radio overlapping. To model traffic density, we consider a signalized junction and road segments linked to that junction as basic building blocks of urban traffic systems. The density model enables us to derive a framework to explain trends and critical regions of radio overlapping corresponding to VANET scenarios targeted for urban transportation systems, which cannot be derived from uniform density models widely used in existing literature. We apply the derived radio overlapping model to study channel load associated with periodic beaconing, a fundamental mechanism for safety message communication in VANETs. This study also provides a generic analytical framework to investigate other performance aspects of data and safety message communication in VANETs. Our experimental results using the proposed realistic density model demonstrate the need for an adaptive mechanism to adjust transmission power and data rate to reduce channel loads associated with dense traffic conditions.
INDEX TERMS
telecommunication traffic, vehicular ad hoc networks
CITATION

S. Bastani, B. Landfeldt and L. Libman, "A traffic density model for radio overlapping in urban Vehicular Ad hoc Networks," 2011 IEEE 36th Conference on Local Computer Networks(LCN), Bonn, 2012, pp. 85-92.
doi:10.1109/LCN.2011.6115563
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