Section: New Results

Communications and Management Control for Cooperative Vehicular Systems

Participants : Ines Ben Jemaa, Oyunchimeg Shagdar, Arnaud de La Fortelle.

One of the attractive applications of electric autonomous vehicles is electric automated Car Sharing service, where on-demand passenger transportation is provided by a set of automated vehicles and a control center, which is installed in the Internet. Data transmission from the control center to the set of vehicles requires an efficient multicast data delivery, i.e. multi-cast routing. The conventional multicast routing in the Internet is based on protocols such as Protocol Independent Multicast (PIM), which relies on a tree structure to deliver packets from the source to the destinations. Thanks to the fixed topology of the Internet, it is possible to build a large and stable multicast trees. However, due to the highly mobile nature of vehicular networks, it is not clear how stable and large can be such trees in vehicular environments. This year, we studied the stability of multicast trees for data flows from the Internet to a set of vehicles [38] , [36] . Our study shows that the stability of multicast tree largely depends on the relative velocity (inter-vehicle) and the road density but not directly on the road shape or moving direction. Based on our study we are developing a mobility aware multicast routing protocol, which constructs its tree based on the vehicles' mobility dynamics and the road condition.