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Vehicular ad hoc networks (VANETs) promise to increase road safety, enhance road transportation efficiency and offer new communication-based services to road users. However, VANETs based on the European and American standards suffer from limited scalability due to poor robustness to radio channel congestion. At present, most works on congestion mitigation are based on transmit power control, while...
The diversity of applications' types in Vehicular Ad hoc NETworks (VANETs) has spawned a large variety of messages that need to be efficiently disseminated between connected vehicles. The most critical messages are those dedicated for safety applications such as road hazardous warning, signal violation warning, etc. The dissemination of this sort of messages is considered as a challenging task in...
Vehicular Ad hoc Network (VANET) is a wireless ad hoc network that provides communications among vehicles with on-board units (OBUs) and nearby roadside units (RSUs). VANETs are general-purpose distributed wireless networks interconnected without the need of any centralized infrastructure. VANETs can be used for many potential applications. The simulation of VANETs requires two different components:...
In recent years, VANET as the key communication networking technology has been attracted by academia and industries with remarkable development. However, there is still many shortcomings especially in communication efficiency where routing algorithm is one of them. In the design phase of routing algorithms, only very few features of vehicle nodes are considered manually to improve the classic algorithms...
Targeting to reduce the traffic accident and improve the traffic efficiency, vehicular network is designed to do message exchange via vehicle to vehicle (V2V) and vehicle to infrastructure (V2I) communications. For V2V communications, orthogonal resources (i.e., time slot) are usually allocated for every vehicle to avoid collisions in V2V communications, which needs complex signaling between vehicles...
Inter-vehicular communications is seen as a promising solution to a number of issues related with public road safety, road congestion management, and infotainment. However, Vehicular Ad-hoc NETworks (VANETs) characterized by high mobility of vehicles and facing a number of other issues related with high frequency wireless communications and network disconnections, encounter major challenges related...
A rich portfolio of services (e.g., road traffic information, maps download, Internet/cloud access) will be delivered to users on wheels through Vehicular Ad Hoc Networks (VANETs).Most of them will be offered by road-side units (RSUs) sparsely deployed along the roads. The prompt access to such services by passing by vehicles highly relies on the efficiency of service announcement procedures performed...
Sustainable economic growth and appreciable living standard in a country heavily depend on the reliability and efficiency of its transport infrastructure. One possible way of enhancing the travel experience of commuters is by using intelligent applications in vehicles that communicate through wireless networks. Envisioning these applications to new heights can be achieved with the recent advancements...
The Transmission Control Protocol (TCP) provides continuous, consistent, congestion restricted connections over the Internet. The research presented idea gives the performance of various existing transport layer protocol over Vehicular Ad hoc Network (vAnET). One version of TCP called TCP WestwoodNR that dynamically adjusts the congestion window. TCP WestwoodNR constantly estimate the end-to-end bandwidth...
With expectation of widespread adoption of Connected Vehicles Technology (CVT), security within the vehicular networks has come under scrutiny. Owing to the nature of CVT applications, security flaws can result not only in loss of data or network function but also in fatal accidents. Security mechanisms that can account for privacy, authentication, integrity, and non-repudiation while having an acceptable...
Vehicular Ad-hoc Network (VANET) communications are mobile communication alternatives allowing vehicles to exchange information among them with a suitable forwarding scheme. The forwarding scheme is a mechanism to select proper candidate nodes as the intermediate node. Current angle-based forwarding schemes take into account a Horizontal Relative Angle (HRA) and propose Vertical Relative Angle (VRA)...
VANET (Vehicular Ad hoc Network) is a special kind of ad hoc network in which each vehicle is regarded as a communication unit, which has attracted lots of attention in recent years. Vehicle's movement is restricted by road and environment in VANET, while traditional random mobility model and way-point mobility model can't reflect the realistic vehicle traces. How to evaluate wireless routing protocol...
Routing protocols in Vehicular Ad hoc Network (VANET) have drawn lots of attention in recent years, most existing research efforts focus on designing IP-based protocols. In this paper, we present a new routing protocol for VANET based on Named Data Network (NDN). We optimize the routing path by using a new distance metric in the protocol, avoiding the shortcomings of hop-count based metric. Moreover,...
Middleware is the software layer that lies between applications and the devices, which make diverse vehicles exchange information transparently in Vehicular Ad Hoc Network (VANET). And the useful information can be seen as services which include web surfing, coordinated braking, runway incursion prevention, adaptive traffic control and many others. In this paper, we focus on discovering the optimal...
Vehicular Ad Hoc Networks (VANETs) are going to be an important communication infrastructure in our moving life. The design of routing protocols in VANETs is a significant and necessary issue for supporting VANET-based applications. However, due to high mobility, frequent link disconnection, and uneven distribution of vehicles, it becomes quite challenging to establish a robust route for delivering...
Vehicular localization plays an important role to enable safety and traffic flow control in intelligent transportation systems (ITS). Global positioning system (GPS) is generally used to localize a vehicle, but it is challenging to obtain the accurate location when the GPS signal is blocked from the satellites or corrupted by the multipath propagation. In this work, we present a GPS-less localization...
Position information of vehicles is a vital requirement in most VANETs (Vehicular ad hoc networks) applications. Thus, positioning is one of the critical issues in VANETs. The existing vehicle localization schemes only consider static estimating problem, while little or no attention is paid to the effect of vehicle movement on localization performance. In this paper, we propose a real-timely vehicle...
Vehicular Ad Hoc Network(VANET) plays an important and indispensable part in the Intelligent Transport System(ITS). The QoS required by data transmission becomes higher due to the moving characteristic of nodes and the increasing of business types in VANET. Hence, the technology of Multi-Radio Multi-Channel has been applied in VANET in order to provide a more efficient network performance. On account...
Road Side Units (RSUs) installed alongside the road in Vehicular Ad Hoc Networks (VANETs) act as buffer points and alleviate the frequent vehicle-to-vehicle connectivity problem. In VANETs, submitting multi-item query is a common phenomenon, for instance, a query with required traffic information of multiple routes. Unlike the single item query, a multi-item query only be satisfied successfully if...
Recently, the Intelligent Transport System (ITS) has undergone significant advances aiming at improving safety in the transportation system. One such progress has led to the introduction of Vehicular Ad hoc Network (VANET). This paper analyses the performance of the Nakagami radio propagation model, which is a realistic model to simulate real life scenarios. Furthermore, this paper examines how VANETs...
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