The purpose of this paper is to evaluate the performance of a system for vehicle-with-vehicle and vehicle-with-pedestrian collision detection when cellular vehicle-to-infrastructure (C-V2I) is adopted as a communication technology. In particular, we are mainly interested in the number of collisions that could be avoided and in the number of false positive alerts (i.e., alert messages referring to situations of low or no danger, that the system delivers to the users). Indeed, a low number of false positive alerts is essential in establishing user confidence in the reliability of alerts received through the system.The remainder of this paper is organized as follows: Section II reviews the research related to the automotive collision avoidance application. Our reference scenario is introduced in Section III, while Section IV presents the design of the automotive collision avoidance system, along with the detection algorithm. The description of the methodology for our simulations and the output analysis technique are in Section V. Section VI contains the results obtained; the paper closes with our conclusions and future research directions in Section VII.
II. RELATED WORKThere are several works in the literature that are related to safety applications in the automotive domain (e.g., [5]). Many of these works, such as [6] and [7], propose collision avoidance and collision detection applications that do not leverage any mobile network infrastructure. In particular [6] focuses on collisions between vehicles and pedestrians in industrial plants. In this case, positioning is achieved using a combination of GPS, MEMS and smart sensors, while the type of wireless communication to the control center is not specified. In [7], White et al. propose a way to automatically detect a collision after it has occurred, using smartphone accelerometers to reduce the time gap between the actual collision and the first aid dispatch.Our solution proposes a trajectory-based collision detection system based on a state-of-the art algorithm that we enhanced to match our needs. The same base-algorithm has been used, in different flavors, in [8] and [9].[8] offers a top-down and specification driven design of an adaptive, peer-to-peer based collision warning system, while [9] proposes a V2V-like approach. However, those two works offer little simulation results. In particular, [8] only focuses on the collision avoidance algorithm, with little attention paid to implementation and network infrastructure.[9] provides some simulation results, Abstract-One of the key applications envisioned for C-V2I (Cellular Vehicle-to-Infrastructure) networks pertains to safety on the road. Thanks to the exchange of Cooperative Awareness Messages (CAMs), vehicles and other road users (e.g., pedestrians) can advertise their position, heading and speed and sophisticated algorithms can detect potentially dangerous situations leading to a crash. In this paper, we focus on the safety application for automotive collision avoidance at intersections, and study the effect...