Dissertation Chapter on Routing in VANET:
In the recent past, a couple of routing protocols for VANET have been proposed. In this research, we focus on the most vital ones.
GSR (Geographic Source Routing)
This protocol has been put forward as the promising routing strategy suitable for vehicular ad hoc networks in urban environments. It is dependable on the availability of a map and the shortest path is computed on the overlaid graph using the vertices as the junction nodes and boundaries as the streets that join the vertices. The progression of junctions creates the route to the destination hence allowing packets to be sent greedily between junctions. When using GSR, the connectivity between two junctions is not taken into consideration; therefore there might not be a connected route through the two junctions. Research has shown that this type of routing protocol is much more effective than AODV and DSR in packet delivery ratio. In heavily populated networks, GSR works better and forwards the packets since most roads are connected. Continue reading