Geo-Opportunistic Routing for Vehicular Networks

Road topology information has been recently used to assist geographic routing in urban vehicular environments to improve the overall routing performance. However, the unreliable nature of wireless channels due to motion and obstructions still makes topology-assisted geographic routing challenging. 

In this paper, we propose TO-GO (TOpology-assisted Geo-Opportunistic Routing) that takes advantage of simultaneous packet receptions among one's neighbors to enable opportunistic forwarding by a subset of the neighbors that have received the packet correctly. The main contribution of TO-GO is to exploit local topology information for efficient forwarding set selection in urban vehicular environments. 

Our extensive simulations confirm TO-GO's superior robustness to channel errors and collisions as compared to conventional topology-assisted geographic routing protocols.