عبدالحمید زاهدی

There has been significant progress in the field of vehicular ad hoc networks -(VANET) over the last several years which support vehicle-to-vehicle and vehicle-to infrastructure communications. With the two types of communication modes, user can access the internet. However, Internet connection for vehicular ad-hoc networks faces a great challenge: vehicle is moving so fast that it may cause the frequent handoffs, which may cause packet delay and packet loss problem and various methods have been proposed to solve this problem, that mobile IP(Internet Protocol ) is the famous one.Mobile IP is protocols has been designed within IETF (Internet Engineering Task Force) and try to provide internet service to mobile nodes via wireless networks. The main purpose of this article the handoff process improvements in vehicle network by mobile IP and methods to reduce handoff latency and packet loss problem. Simulation results in NS-2 simulator is implement and brings out some important characteristics different between the handoff using mobile IP and handoff without using mobile IP