Road Side Unit Deployment: A Density-Based Approach

Abstract

Currently, the number of vehicles increases every year, raising the probability of having accidents. When an accident occurs, wireless technologies enable vehicles to share warning messages with other vehicles by using vehicle to vehicle (V2V) communications, and with the emergency services by using vehicle to infrastructure (V2I) communications. Regarding vehicle to infrastructure communications, Road Side Units (RSUs) act similarly to wireless LAN access points, and can provide communications with the infrastructure. Since RSUs are usually very expensive to install, authorities limit their number, especially in suburbs and areas of sparse population, making RSUs a precious resource in vehicular environments. In this paper, we propose a Density-based Road Side Unit deployment policy (D-RSU), specially designed to obtain an efficient system with the lowest possible cost to alert emergency services in case of an accident. Our approach is based on deploying RSUs using an inverse proportion to the expected density of vehicles. The obtained results shows how D-RSU is able to reduce the required number of RSUs, as well as the accident notification time. Index TermsVehicular networks, Road Side Unit, vehicle-to-infrastructure communication, road safety.

Influence Maximized MCL based RSU Deployment

“…K. Barrachina et al in [2] suggest deploying RSUs using an inverse proportion to the expected density of vehicles. However, this approach simply considers the density of vehicles, while neglecting the fact that a vehicle can carry and forward the information to the adjacent intersection.…”

“…Recently many researches on efficient RSU deployment have emerged [2][3][4][5], and we have also proposed a couple of RSU allocation strategies [6][7][8] which can cover intersections based on the concept of intersection connectivity. The intersection connectivity means the probability of message transmission between any two intersections [2].…”

“…The intersection connectivity means the probability of message transmission between any two intersections [2]. Based on the intersection connectivity, we can find several intersections with relatively big traffic inflow from other intersections.…”

V2X-d: A vehicular density estimation system that combines V2V and V2I communications

“…RSU deployment also allows communication between different areas of the map if necessary, by connecting to a common backbone [12].…”

“…Regarding V2I communications, we used the Uniform Mesh deployment policy [12] to deploy RSUs in the maps. This approach consists on distributing RSUs uniformly on the map.…”