Zone based Epidemic Routing in urban VANETs

Vehicular ad hoc networks (VANETs) are known for highly mobile and frequently disconnected characteristics. In this paper, we propose a new epidemic routing protocol in urban environment called Greedy Zone Epidemic Routing (GZER), in which neighbors of a vehicle are divided into different zones according to their physical locations. In each zone, the infection is decided by the zone summary vector. Simulation results show that GZER has compatible delivery ratio with the Epidemic Routing under low vehicle density or light packet traffic load settings, while it has a much better performance in all metrics under high vehicle density together with heavy packet traffic load settings.