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In this paper, we introduce Receiver as prOXY (ROXY) VANET routing protocol to overcome many limitations of other VANET routing protocols introduced in the literature. ROXY employs a geographic routing scheme with opportunistic next hop selection, to increase the overall VANET networks throughput. Its main objective is to solve the increasing congestion and collisions in heavy loaded network traffic...
Vehicular Ad Hoc Networks (VANET) are key to realizing Intelligent Transportation Systems (ITS). Although VANETs belong to the class of Mobile Ad Hoc Networks (MANET), and there are numerous routing protocols for MANETs, none of these protocols are applicable for VANETs. In particular, VANETs are highly dynamic due to high speed mobility of vehicles and traditional routing algorithms for MANETs cannot...
The vehicular ad hoc network (VANET) is an essential technology that enables the deployment of the intelligent transportation system (ITS), which improves the traffic safety and efficiency. For the efficient message delivery in VANET, it is desirable to provide a reliable and stable VANET routing protocol. However, VANET routing is challenging since the VANET is fundamentally different from conventional...
Vehicular Ad hoc Network (VANET) is a special kind of Mobile Ad hoc Network. VANETs are becoming a technology for connecting vehicle to computer networks. VANETs consist of dynamic nodes in the form of fast moving vehicles whose movements are restricted to road layouts and static nodes in the form of Road Side Units (RSU). Frequent communication disconnections between vehicles are happening due to...
VANETs (Vehicular ad-hoc network) are characterized by a very dynamic topology with partial infrastructure support, patterned mobility, and mobile nodes with sufficient amount of resources, intermittent connectivity and varied channel behavior. For this purpose, we always use the location information that vehicles share among them through repetitive messages that are transmitted in the VANET system...
The rapid development of the wireless communications lets more and more people are used to access network services via various wireless technologies. Users expect the ubiquitous network environments to acquire information they needed anytime and anywhere. How to provide an efficient routing protocol is one of major challenges in VANETs to improve the performance in terms of packet delivery ratio,...
VANET (Vehicular Ad-hoc NETwork) is comprised of devices that are installed inside vehicles and on road sides. Since vehicles can move randomly and at various velocities, the network topology is highly dynamic. Consequently, links between network nodes could be broken at anytime and communications from vehicle to vehicle could be corrupted. For this reason, a routing protocol independent of the network...
This paper presents a Priority based Routing Protocol (PRP) in Vehicular Ad hoc Network (VANET), according to message types. We focus mainly on a safety messaging application for safe driving in distributed environment, i.e., ad hoc manner. Broadcast based routing protocol is proposed along with priority and position enhancement to provide i) fully distributed routing protocol, ii) different quality...
The Vehicular Ad hoc Network (VANET), a subset of Mobile Ad hoc Network, is used in many applications such as assisting driver with signage, road traffic reporting, telling the way, etc. Since VANET has highly dynamic topology and various vehicle densities, developing a routing protocol that can satisfy above applications requirements is a great challenge. In this paper, we present an efficient Road...
It is being envisaged that a wide variety of applications can be running on vehicular ad hoc networks (VANETs) in the near future. The coexistence of these applications suggests that they will be competing for the use of the wireless medium. That easily leads to severe congestion and even “hotspot” problem in high traffic density urban areas, and results in the failure of time-critical applications...
A Vehicular Ad Hoc Network (VANET) not only experiences highly mobile and frequently disconnected, but may also have to deal with rapid changes of network topologies, especially when accidents and road traffic jams happen. In this paper, we propose a novel approach to address this issue. Due to the intermittent connectivity in VANET, we adopt the idea of carry and forward, where a moving vehicle carries...
In this paper, we study the vehicle-to-vehicle communication and destination discovery problems that are often seen in VANET. Then we present a novel routing protocol called COoperative Destination discovery Scheme with ADaptive routing (CODS-AD). CODS-AD not only enables vehicles to cooperatively assist source node to discover the position of destination node, doing so without the support of location...
The rise in the number of vehicles on the streets today has led to an increasing need for traffic safety on roads. The emerging vehicular ad hoc networks (VANETs) are fast becoming a reality and will enable a variety of applications for safety, traffic efficiency, driver assistance, as well as infotainment. In order to provide stable communication linkages between vehicles, a good routing protocol...
Bidirectional road is the basic and ordinary scenario of Vehicular Ad hoc Network (VANET) which is an emerging and challenging research applying mobile ad hoc technology to transportation system. According to different forwarding mechanisms in routing protocol of such network, the connections are divided into end-to-end (E2E) type and Store-Carry-Forward (SCF) type. The packet reachability probabilities,...
The local information gathered by periodic beacons may include some outdated one caused by high mobility of nodes and the interval of beacons in the Vehicular Ad hoc Networks (VANET). Routing protocols for VANET can eliminate outdated links to neighboring nodes effectively if they can estimate the link expiration time. The transmission range is required to get the link duration time, and the value...
Recently, vehicular sensor networks (VSNs) have emerged as a new wireless sensor network paradigm that is envisioned to revolutionize driving experiences and traffic control systems. Many existing routing protocols for VSNs have good performance on data routing in a city environment. In this paper, we propose a traffic control aware routing for VSNs, which is called PUT. It considers two modules of...
Vehicular Ad hoc Network (VANET), as a subclass of mobile Ad hoc Networks (MANETs), is a promising approach for traffic security, mobile internet and V2V communication. While the packet loss estimation of VANET impacts routing protocol and transmission control algorithm, it turns out to be an important issue. In this paper, we propose an estimation algorithm for packet loss on VANET, RPLE (Real time...
Vehicular Ad-Hoc Networks (VANETs) are an important research area due to the potential benefits they could bring to traffic optimisation in urban environments. The communication protocols used within such networks, due to the intrinsic properties of such environments, reflect a series of characteristics which set them apart from common approaches. Routing messages, using a carry-and-forward strategy...
Vehicular ad hoc networks (VANETs) applied to specific scenarios are kinds of opportunistic networks. Introducing currently opportunistic routing protocols and actual VANETs characteristics, the paper proposed an opportunistic routing protocol based on the comprehensive utilities of forwarding nodes. The protocol conducted a dimensionless method to deal with these factors including the distance between...
Vehicle to vehicle communication has strong potential to be a mechanism to improve driver's safety and is now emerging as a prominent research area all over the world. At present, vehicular networks are still not considered to be very efficient because of their rapid topology changes and their highly dynamic structure. However, there has been ongoing and progressive research and development in Vehicular...
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