The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Multi-hop broadcast communication is one of the main communication mechanisms to propagate safety and non-safety messages through vehicles in Vehicular Ad hoc Networks (VANETs). In our previous work, we proposed two broadcast schemes, fuzzy logic-based broadcast (FLB) and bandwidth-efficient fuzzy logic-assisted broadcast (BEFLAB). FLB offers high level of reachability where BEFLAB is more bandwidth...
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...
Recent years have seen a growing interest in Vehicular Ad hoc Networks (VANETs) and their benefits to the development of intelligent transportation systems (ITS). With the deployment of multimedia services over VANETs, there is a need to develop new approaches to insure higher level of quality of services (QoS) for real time applications, and integrate QoS into routing protocols. However, in VANET...
Data aggregation for VANETs is considered a vital building block for many applications due to its bandwidth saving potential. In this paper, we propose a novel context aware data aggregation technique for VANETs. The data aggregation is done by the cluster head based on the context i.e. vehicle speed and density to reduces the required bandwidth for periodic data dissemination. The proposed technique...
In the recent decade the VANET has been emerged as a prominent field for research and it receives considerable attention. VANET uses different specifications of the WLAN 802.11 family. It takes the basics of ad hoc network and the VANET creates a network with a collection of independent entities with the ability to communicate among themselves. The Adaption to the various 802.1 family causes a remarkable...
As researchers got interested in the vehicular ad hoc networks (VANET), several approaches and uses have been given. One of the most interesting is the network congestion control in an ad hoc environment. Our work consists of introducing a new approach in congestion control of Vehicular Ad Hoc Networks (VANET), using a new model. Our model is based on the hop by hop congestion control methods. This...
In recent years, the immense and ubiquitous coverage area of vehicular network is growing very frequently as the computational power and deployment of modern vehicle's wireless connectivity and their service facilities are raised. VANET (Vehicular Ad hoc Network) have become an orientation to the researchers and users both for inventive utilization of wide range of safety and non-safety applications...
Vehicular ad hoc network performs crucial functions in road safety, detection of traffic accidents and reduction of traffic congestions by allowing vehicles on roads to disseminate messages. Efficient message dissemination among authentic vehicles in vehicular ad hoc network is proposed in the present work. Each vehicle generates beacon message periodically and broadcasts it for neighbors. The emergency...
Vehicular networks have been regarded as the key enabling technology of the future smart vehicles. Existing vehicular communications mainly rely on a single network instance or utilize data offloading over two networks (e.g., IEEE 802.11p and cellular network). However, today's vehicular network implementations are highly heterogeneous. Conventional homogeneous communication and data offloading may...
In this paper, a two purpose structure to simultaneously determine the shortest travel time path for a moving vehicle and efficient packet dissemination for traffic information messages has been presented. In order to reduce traveling time, vehicles are directed to the paths with lower density. Given that, such paths have a higher risk in radio coverage partitioning; it is more likely to reduce successful...
As a special type of mobile ad hoc networks (MANETs), vehicular ad hoc networks (VANETs) are expected to support vehicle to vehicle communication and vehicle to infrastructure communication. The conventional relay selection scheme proposed for MANETs may perform poorly in VANETs due to the unique characteristics of VANETs, including highly dynamic network topology, unstable link status and multiple...
In recent years, vehicular ad-hoc networks (VANETs) have received considerable attentions. As a promising approach to future Intelligent Transportation System (ITS), VANET is capable of providing safety related applications, Internet accessing and various user applications for drivers and passengers. To support efficient data interaction among vehicles, clustering based topology can be applied which...
Clustering is expected to be one of the most efficient and promising solutions for data transmission in Vehicular Ad hoc NETworks (VANET). The particular characteristics of VANET, including highly dynamic network topology, unstable transmission channel, and various service requirements, pose challenges and difficulties on clustering algorithm design. In this paper, a clustering algorithm based on...
Connected vehicle technology aim to solve some of the biggest challenges in the transportation in the areas of safety, mobility and environment. The safety application for Intelligent Transport System(ITS) is one of the main objectives in this project. Safety application is research and industrial initiative which aim to contribute to the global advancement of automobile industry. In this project...
Safety applications in VANET use two types of messages (a)periodical messages/beacons: they are broadcast several times per second to exchange information with neighbors; and (b) warning (event driven) messages: they are generated when an event occurs (e.g., a car accident) and are disseminated in the network to notify nodes of interest. Although warning messages have higher priority, beacons are...
As a special form of mobile ad hoc network (MANET), vehicular ad-hoc network (VANET) is expected to support communication between vehicles, and between vehicles and stationary infrastructures, such as access points (APs). However, due to the highly mobile characteristics of VANET, the direct connection between source vehicles (SVs) and APs might be inaccessible. In this case, relay vehicles (RVs)...
Predecessors take cooperative downloading method to solve this delay issue, while this method need mutual cooperation between vehicles, but a incentive mechanism for this cooperative downloading method still has not been put forward. This paper based on cooperative downloading method to design the incentive mechanism, to encourage cooperation between vehicles, and help users to receive the needed...
This paper introduces some early results on field of view design parameters for intravehicle optical wireless communications systems. It concludes with an opinion of ours that a wider field of view is necessary to increase both the received power and the end user friendliness at the expense of increased shot noise. Through some simple scenario testing, this paper will provide some guidelines for the...
In this paper, the first results to show the power, bandwidth and RMS delay spread of an intra-vehicle optical wireless communication system from a passenger perspective are presented. This work builds upon a previous investigation of ours which had demonstrated potential for optical wireless deployment within a vehicle as a potential competitor to RF based systems. By now incorporating the presence...
In Vehicular ad hoc networks (VANETs), the current three primary wireless network routings, i.e. DSDV, AODV and DSR, are widely utilized to propagate information. In this paper, we study such a scenario: in the network which consists of both vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications, vehicles are moving on highway. When the vehicle enters into the blind area between...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.