Enhanced GPSR using Neighbor-Awareness position Update and Beacon-assist Geographic Forwarding in vehicular ad hoc networks

It has been a big challenge to set the position update interval that can meet different network densities and application needs. We present Neighbor-Awareness position Update (NAU) to set the position update interval dynamically, according to its neighbors´ number and position. Beacon-assist Geographic Forwarding (BGF) strategy enables nodes to forward packets by considering their neighbors´ beacon interval in neighbor list. The proposed algorithm (called GPSR-N&B) represents a modification of well-known GPSR. The results confirm that our scheme reduces beacon overhead and MAC layer collisions in different densities and velocities of vehicular ad hoc network, while ensuring the Successful Date Rate (SDR) performances well.