A Traffic Density Model for Radio Overlapping in Urban Vehicular Ad Hoc Networks
Vehicular traffic density is a key factor in determining the behavior of radio overlapping and thus impacts performance of data and safety message communication in Vehicular Ad hoc Networks (VANETs). In this paper, the authors 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, the authors consider a signalized junction and road segments linked to that junction as basic building blocks of urban traffic systems. The density model enables them 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.