Abstract:
Vehicular Ad hoc networks (VANETs) are self-organizing networks. They are the upcoming wireless network environment for intelligent transportation systems (ITS) . VANETs can significantly the improve the traffic safety without requiring fixed infrastructure or centralized administration. However, data dissemination in VANET environment is a challenging task, mainly due to: rapid changes in network topology, the high dynamic of the network topology, different traffic type, and mobility patterns. For safety and emergency message applications, reliable message dissemination is an important key factor . In this thesis, it is proposed a new protocol for reliable message dissemination in vehicular ad hoc networks. This protocol is called optimal clustered geocast protocol (OCG) . The matlab is used for simulation and require results are taken.The efficiency of this protocol is measured in terms of reliability message, delivery ratio, overhead and latency . The advantage of the proposed protocol is increasement of the reliability of the message to 40%broadcasting rate to 100%,while it enhances congestion by 43% and delay by 93% respectively.
