Study of Broadcasting and Its Performance Parameter in VANET

A Vehicular Ad-Hoc Network is a kind of ad-hoc network, and is a self-configuring network of vehicular routers connected by wireless links. Vanet presents new and promising field of research, development and standardization. Vehicular Ad-Hoc Network is a wireless network without infrastructure. Reliable broadcasting in vehicular ad-hoc networks is one of the keys to success for services and applications on intelligent transportation system. Broadcasting in VANET is very different from routing in mobile ad hoc network (MANET) due to several reasons such as network topology, mobility patterns, demographics, traffic patterns at different time of the day, etc. In this paper we report the broadcasting in VANET, three very different regimes that a vehicular broadcasting protocol needs to work and the performance parameter of broadcasting in VANET. 1. INTROODUCTION Broadcasting in wireless networks can serve numerous applications where reliability is not necessary and time is not a critical requirement.The emergence of VANETs opened a new research challenge of time-critical reliable broadcasting that intended to serve a bunch of public safety related applications One of the challenges posed by this type of networks is the confinement of the routing problem to vehicle-to-vehicle scenarios as opposed to also utilizing the wireless infrastructure ( cellular network). At a Conceptual level, safety and transport efficiency is a essential for car vendors and this has to be provided by the cars on the road as opposed to also using the existing wireless communications infrastructure. Applications with this world constraint (rules) call for a new routing protocol for vehicular broadcasting in VANET. In this paper, we report the comprehensive study on the topic whereby the extreme traffic situation such as dense traffic, sparse traffic density, and low penetration of cars using Dedicated short range communications technology are specifically taken into consideration. The remainder of this paper is organized as follows. Section 2 presents different areas of interest in VANET that the designed broadcast protocol should be able to handle. Section 3 discusses some performance parameters. 2. REGIMES FOR BROADCASTING IN VANET The three different regimes of operation in VANET are: