Vehicle Density and Roadmap Topology Issues when Characterizing Vehicular Communications

In this paper, we study the influence of the roadmap topology and the number of vehicles when accounting for the vehicular communications capabilities, especially in urban scenarios. Additionally, we propose the use of two metrics: the SJ Ratio (SJR) and the Total Distance (TD), as the metrics that better correlate with communications performance. Hence, researchers will better characterize the different urban scenarios. In particular, simulation results demonstrate that roadmaps with both similar SJR and TD present similar communications performance in terms of vehicles informed.