International Journal of Computer Science and Mobile Computing (IJCSMC)
Geographic routing is a technique to deliver a message to a node in an ad hoc network over multiple hops by means of position information. Each node updates its own position by the use of GPS or any localization techniques and forwards the data to the node closest to the destination. All nodes send a beacon known as location update message to its one hop neighbors. The most commonly used geographic routing algorithm is Greedy Perimeter Stateless Routing protocol (GPSR) where communication is unicast.