Efficient routing protocol for Vehicular Ad hoc networks

Vehicular Ad hoc Network (VANET) is a special type of Intelligent Transport System (ITS), The design of routing protocols in VANETs is important and necessary issue for support the smart ITS. The key difference of VANET and MANET is the special mobility pattern and rapidly changeable topology. Existing routing protocols of MANET are not suitable for VANET. This paper proposes SD-AOMDV as VANET routing protocol. SD-AOMD improves the most important on demand multipath routing protocol AOMDV to suit VANET characteristics. SD-AOMDV add the mobility parameters: speed and direction to hop count as new AOMDV routing metric to select next hop during the rout discovery phase. Simulation results show that SD-AOMDV achieves better performance.