today, vehicular ad-hoc network between automobiles has been accepted by the public, and many people are interested in exchanging information with other vehicles as well as with roadside equipment while driving. when a number of vehicles want to access to the data stored in rsu ,the priority of servicing comes into face .in this case, some  methods, such as d*s, d*s/n,  have been presented so f...

A key component for safety applications in Vehicular ad-hoc network (VANET) is the use of periodic beacon messages which provide vehicles with a real-time vehicle proximity map of their surroundings. Based on this map, safety applications can be used for accident prevention by informing drivers about evolving hazardous situations. In order to allow synchronized and cooperative reactions, the ta...

VANET has become an active area of research, standardization, and development because it has tremendous potential to improve vehicle and road safety, traffic efficiency, and convenience as well as comfort to both drivers and passengers lot of VANET research work have focused on specific areas including routing, broadcasting, Quality of Service (QOS),and security. In a network environment in whi...

Traffic jams and traffic accidents have become a major concern in current society. VANET (vehicle ad hoc network) is an emerging attractive application to solve such problems. Quality of service (QoS) in VANET becomes a hot topic own to its increasing challenge about unique features, such as limited transporting distance, high mobility, and poor link quality. The main goal of this paper is to a...

Recent advances in hardware, software, and communication technologies are enabling the design and implementation of a whole range of different types of networks that are being deployed in various environments. One such network that has received a lot of interest in the last couple of S. Zeadally ( ) Network Systems Laboratory, Department of Computer Science and Information Technology, Universit...

VANET is an emerging new technology developed by integrating ad hoc network, wireless LAN (WLAN) and cellular technology to enable intelligent inter-vehicle communications and to improve road traffic safety and efficiency. VANET are distinguished from other kinds of ad hoc networks by their hybrid network architectures, node movement characteristics, and new application scenarios. Therefore, VA...

Vehicular Ad hoc NETworks (VANETs) have emerged as a platform to support intelligent inter-vehicle communication and improve traffic safety and performance. The road-constrained, high mobility of vehicles, their unbounded power source, and the emergence of roadside wireless infrastructures make VANETs a challenging research topic. A key to the development of protocols for inter-vehicle communic...

Intelligent Transportation Systems (ITS) support vehicle to vehicle communication using transport based infrastructure which can be referred as Vehicular Ad Hoc Networks which are self-organized, self-healing networks that provide wireless communication among vehicles and roadside equipment. VANET is formed between vehicles on an as-needed basis. To form a VANET, wireless transceivers and compu...

The Vehicular Ad-hoc Network (VANET) has been studied in many fields since it has the ability to provide a variety of services, such as detecting oncoming collisions and providing warning signals to alert the driver. The services provided by VANET are often based on collaboration among vehicles that are equipped with relatively simple motion sensors and GPS units. Awareness of its precise locat...

In IEEE 802.11p protocol of Vehicular Ad-Hoc network (VANET), the multiple channels are divided into one control channel (CCH) and six service channels (SCHs). CCH is used for broadcasting safety messages related to road conditions, so that CCH access algorithm has great influence on efficiency of VANET. This paper proposes a contention-free bandwidth partition algorithm, which can dynamically ...