Cloud-Assisted Dynamic Content Sharing among Vehicles

In this paper, we propose a method to share dynamic contents such as short video clips created by vehicles' mounted cameras. In these days, many vehicles are equipped with driving recorders and other sensors to detect surrounding situations. Such cameras and sensors can work as real-time monitors of traffic conditions and other dynamic environments such as road situations. Such information should be shared by neighboring vehicles for safer driving. For this purpose, we take a hybrid approach where we use V2V communication and V2I communication via cellular networks to realize cloud-assisted, V2V-based dynamic content sharing. The key idea is that the cloud server only collects the vehicles' coordinates periodically and determines a content exchange schedule that maximizes the utilization of V2V communication and minimizes the cost of cellular communication, keeping reasonable delivery ratios. This is based on the mobility estimation of vehicles and DTN-based content delivery. Through extensive simulations, we show that our method can reduce cellular network traffic volume, while keeping reasonable delivery ratios.