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.
Vehicular ad hoc networking (VANET) have become a significant technology in the current years because of the emerging generation of self-driving cars such as Google driverless cars. VANET have more vulnerabilities compared to other networks such as wired networks, because these networks are an autonomous collection of mobile vehicles and there is no fixed security infrastructure, no high dynamic topology...
In this paper, we design and implement a new Intrusion Detection Framework for Vehicular Networks (IDFV). These networks are vulnerable to various security attacks due to the lack of centralized infrastructure. The aim of our framework is then to secure them against the most dangerous routing attacks that have a high severity damage such as selective forwarding, black hole, wormhole, packets duplication...
Pre-crash warning is a core functionality in vehicular ad hoc networks (VANETS). To avoid accidents, each vehicle calculates the probability of a collision with any of its neighbors based on the received beacons. An accurate neighbor awareness requires a high beacon transmit rate, which leads to an overloaded communication channel in dense traffic scenarios. To reduce channel load and increase the...
In this paper, we study the information propagation speed in a 1D mobile ad hoc network formed by vehicles Poissonly distributed on a highway and travelling in the same direction but with random Gaussianly-distributed speeds, independent between vehicles. Assume that time is divided into time slots of equal length and that each vehicle changes its speed at the beginning of each time slot, independent...
We discuss the accuracy of a mechanism, called Oracle, to assess position and transmission ranges in VANET. We prove that, in the best case, the assessments of the oracle are exact. Moreover, we prove that the average case of the Oracle coincides with its best case. Therefore the Oracle is optimal. The errors that afflict the assessments of both the positions and the transmission ranges depend on...
Recent studies have demonstrated that the performance of routing protocols in vehicular networks can be improved by using dynamic road traffic information to select the most appropriate forwarding paths or nodes. However, most of the techniques to estimate such traffic conditions imply an important communications overhead that compromises their future viability. In this context, this paper introduces...
Vehicular ad hoc networks support a wide range of promising applications including vehicular sensing networks, which enable vehicles to cooperatively collect and transmit the aggregated traffic data for the purpose of traffic monitoring. The reported literatures mainly focus on how to achieve the data aggregation in dynamic vehicular environment while the security issue especially on the authenticity...
VANETs have been envisioned as an infrastructure for deploying Vehicular Information Systems (VIS) that among others provide drivers with an up-to-date view on the prevailing traffic conditions. In this work we evaluate the benefits of caching vehicular information obtained from such VIS through VITP, a location-aware, application-layer communication protocol that we extend to support caching. We...
Travel route analysis and prediction are essential for the success of many applications in Vehicular Ad-hoc Networks (VANETs). Yet it is quit challenging to make accuracy route prediction for general vehicles in urban settings due to several practical issues such as very complicated traffic networks, the highly dynamic real-time traffic conditions and their interaction with drivers' route selections...
Inquiring traffic information is an important issue in vehicular ad hoc networks. This paper proposes an aggregating data dissemination algorithm in vehicular ad hoc networks. This algorithm can offer the various degrees of traffic information when users propose inquiry for different regional ranges. The user often needs to obtain the detailed data from the small area or the summary data for the large...
Vehicular Ad Hoc Networks (VANETs) have been widely studied, and the deployment of such networks is likely to happen soon as the required technology and commercial opportunities are already available. Most of applications proposed for these networks require a localization mechanism with reasonable accuracy. In addition to applications, most protocols rely on the availability of a system that determines...
In this paper, we propose a constrained weighting scheme of inter-vehicle communication assisted localization (CWS-IVCAL). CWS-IVCAL takes into consideration the location estimate uncertainty maintained by vehicles that use IVCAL as a localization technique. In IVCAL, communication among vehicles is utilized to compute inter-vehicle distances, which are integrated with motion information and GPS measurements...
With an emergence of vehicular ad hoc networks, it is highly likely that in the near future vehicles on the road will be used as mobile probes for collecting and distributing traffic information such as the travel time. Generally, the travel time on a road section can be estimated from the global positioning data collected by a mobile probe. The more frequent the positioning data are collected or...
Providing vehicles' position is essential in VANETs. Currently, GPS positioning is widely used, but the accuracy is not adequate for emerging safety applications. In order to provide accurate positioning, this paper proposes RF-GPS, a RFID-assisted localization system that reliably supports lane-level position accuracy. It improves accuracy of the GPS system by employing a DGPS-like concept. It also...
The success of VANET safety mechanisms, e.g. pre-crash warning and collaborative collision avoidance, relies on good proximity-awareness of each subject vehicle. Prior analysis shows that a self-information dissemination control on each car, which adapts communication rate based on estimation error and channel congestion, can achieve higher tracking accuracy than others in a multi-access channel....
Wireless position is one of the most important research fields in VANET application. It has certain technical restrictions to realize the accurate position between vehicle using wireless communication network., but it can realize approximate position between vehicles in local area, and can satisfy the requirement of vehicle active safe technologies such as collision warning for location precision...
We present a distributed algorithm to fast multi-hop message propagation for ad hoc vehicular networks (VANET). Our protocol obtains optimal performances in challenging scenarios which are likely in real situations, but that have been not extensively studied in the literature as they are complex to be tackled. In particular, the Farther Relay and Oracle for VANET (FROV) deals with asymmetric communications...
Vehicle density is one of the main metrics used for assessing the road traffic condition. A high vehicle density usually indicates that the traffic is congested. Currently, most of the vehicle density estimation approaches are designed for the infrastructure-based traffic information systems. These approaches require detecting devices such as inductive loop detectors or traffic surveillance cameras...
Awareness of a vehicle's precise location in VANET is vital so that any vehicle can provide accurate data to its peers. Currently, typical localization techniques integrate the GPS receiver data and the measurements of the vehicle's motion. However, when the vehicle passes through an environment that creates multipath signals, these techniques fail to produce the high localization accuracy that they...
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.