Analysis of the coupling of communication network and safety application in cooperative collision warning systems

Abstract

Cooperative collision avoidance systems rely on communication between vehicles to achieve the objective of automated or human-dependent crash avoidance. In this paper we investigate the mutual coupling of communication component and the safety application in cooperative collision warning systems. These systems are warning based collision avoidance systems that are currently under field test. We present a comprehensive co-simulation modeling framework which allows modeling and study of the entire system including vehicle dynamics, communication protocols, and collision detection/warning algorithms. Using this model, we show that in designs where the safety application and communication components are designed separately and agnostic to each other, system performance requires significantly higher network resources. Alternate content-and network-aware design strategies are shown to significantly reduce the required resources, resulting in significant reliability improvements. However, the cost of such strategies is mutual coupling of the performance of safety application and communication components. We show that such coupling can be effectively controlled in desired operation ranges for each component, leading to robust systems. The presented framework introduces a method for the study of a wide spectrum of communication dependent vehicular cyber-physical systems.

Robustness of cooperative forward collision warning systems to communication uncertainty

“…This is expected since this method reacts to PER by increasing the rate. The logic behind the results are consistent with our previous work [2]. While the work in [2] evaluated algorithms such as CAMPLinear, here we look at the performance of our time based FCW algorithm.…”

“…Effect of communication loss and safety application can be modeled similar to the work in [2].However, here we are considering different safety applications than in [2]. We first assume that the communication performance is independent from safety application behavior.…”

“…For this reason, we have developed a co-simulation tool [1] that allows for study of the overall system performance under different configurations and constraints of subsystems. In this paper, we build on our previous work on the study of mutual coupling of communication and safety applications [2], and aim at identifying the relationship between uncertainty in communication, vehicle tracking and accuracy of emerging hazard detection algorithms. We also present two methods for forward collision detections in this paper.…”

“…The work in [2] is an example of such works that looks at the mutual impact of communication and safety application from a Cyber-Physical Systems perspective.…”

Delay-Aware Design, Analysis and Verification of Intelligent Intersection Management

“…However, the wireless nature of vehicular communications makes it susceptible to significant communication delays [14] and packet losses [15] in dense traffic scenarios or under security attacks [16]. Previous works on intelligent intersection management lack the consideration of communication message delays and losses, and consequently cannot ensure the proposed protocols to be safe, deadlock free and efficient in practical conditions.…”