A study on maintaining links in urban VANET using handover method

Vehicular ad hoc networks (VANET) mean wireless networks where communication terminals in VANETs do not necessarily require infrastructures to communicate with each other. To provide Intelligent Transportation System (ITS) services in VANETs, there are lots of issues about network performances for several application types. In particular, if applications need stable link-status, there are lots of argues disturbing wireless communication, such as fading, shadowing, density, vehicles´ fast and dynamic movement, etc. In this paper, we proposed an algorithm for maintaining communication links more stably using Handover method. The proposed scheme guarantees a high level of stable communication in urban VANETs and reduces the overall traffic in highly mobile VANETs. The performance of the scheme was evaluated through commercial simulator QualNet 4.5, which supports various possible effects in the city condition. Simulation results indicate the benefits of the proposed routing strategy in terms of increasing the end-to-end throughput, reducing the number of link-breakage events, reducing the end-to-end delay.