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.
Emerging road network data management needs data integration which conventional planar road data models are insufficient to support. And the prevalent data models have advantages and disadvantages varying in representation scale. In order to comprehend the user requirements, an integrated road data model for multi-scale transportation applications was introduced, including three topology abstraction...
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...
Efficient mobility management is an issue of vast economic importance for its consequences on urban and suburban mobility. In this context, telecommunications are gaining a key role, allowing to increase people safety, traffic efficiency, and travel comfort. To investigate the telecommunication systems behavior in new infomobility scenarios, advanced simulations tools are needed jointly taking into...
The rapid fusion and integration of road network and dynamic traffic data is vital for real-time road vehicle navigation. Yet current navigation electronic map and geographical information systems (GIS) are not well adapted to the real-time dynamic traffic navigation data integration and integrated Spatio-temporal database manipulation. This paper brought forward the principles, methodologies, integrative...
Based on traffic data acquisition by the vehicles themselves, road traffic self-organization has been studied for several years. Geolocation equipment is now available at an affordable cost. With the IEEE-802.11p standard, wireless inter-vehicle communication is of age. This explains current interest for this subject, the practical applications being immediate.
The traditional vehicle navigation system is an isolated system, which can not meet the demanding of public traveling and traffic manage. Real-time traffic information is one of the most important applications for the driver and an essential feature of vehicle navigation system. Now today, most of the former navigation systems are developed based on static data instead of real-time or dynamic traffic...
With the development of the intelligent transport system, it has become an inevitable trend to achieve dynamic navigation services in adapting real-time traffic information. ESRI shapefile digital map format is firstly introduced in this paper, and a real-time navigation data model based on user-defined layers in shapefile, which makes it feasible for vehicle navigation applications, is proposed next...
In order to estimate the approach angle and relative height of Unmanned Aircraft Vehicle (UAV) which lands autonomously, a combinational approach of monocular vision and stereo vision is presented. From monocular sequences, vanishing line is extracted by Hough transform and RANSAC algorithm, and then approach angle of UAV is calculated through vanishing line geometry. From stereo sequences, feature-based...
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.