Vertical handover in Vehicular ad-hoc network using multiple parameters

Reliability and timely information delivery are highly concerned factors in Vehicular ad-hoc network. A better handover mechanism plays an important role in the handover process between the vehicle nodes during the vehicles on the road. Vertical handover is very much essential to ensure service continuity in Vehicular Ad-hoc network. When we compared with conventional handover decision taken by single criteria, multi criteria decision methods reduce handover rate and effectively utilizing the usage of network resources. In Vehicular Ad-hoc Network continuous connectivity is a great challenge, because of vehicles speed and ever changing topology of the network. In VANET vehicles can communicate through Vehicle-to-Vehicle communication mode and Vehicle-to-Infrastructure communication mode. Users in the vehicular network can access internet while on the move from one place to another with V2I. Due to heterogeneous wireless access, vertical handover is needed to maintain continuous connectivity between the vehicles and infrastructures. In this paper advanced methods of vertical handover decision algorithm is used to select best available network by comparing multiple parameter values (such as network traffic and vehicle speed). The algorithm is evaluated by assessing the performance through the number of handoff occurs, throughput gained and level of latency attained. The performance of the simulation shows that the number of handover and latency can be minimized where as throughput can be maximized, if we consider vehicle speed and network traffic parameters for taking handover decision process.