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For several years, location based information services have been studied and implemented in various fields including mobile communication and ubiquitous computing to gain advantages for their usage and their convergence services nature. One of the most powerful ways to personalize mobile services is based on location. There has been a tremendous increasing number of researches as well as development...
With the increasing safety requirements in automation management, an effective vehicle management system is becoming more and more necessary and urgent in all departments. Based on widely application of the advanced information technologies, a practicable system of vehicle dispatching and monitoring is designed for flight service in this paper. Firstly, the target of the system is presented; Secondly,...
There are two main types of applications for vehicular ad-hoc networks (VANET): safety applications and user applications (such as entertainment and mobile commerce). For user applications, Internet connectivity is a necessity. However, it is challenging to provide fast handoff for vehicles in a VANET due to the rapid movement of vehicles. Previous studies have showed that the time required by the...
We consider a Ferry based Wireless Local Area Network (FWLAN), in which information is forwarded from a base station to sensors, or gathered from sensors to a base station using a moving Ferry. The sensors are scattered in a large area and do not have direct radio connectivity with the base station. The ferry thus serves as a relay that enables communication between the sensors and the base station...
The process of the alternative functioning of the mobile phones shall be detailed keeping in mind that these devices have less memory and less computing capacity. A simple background subtraction algorithm process may be used, that projects a moving object in consideration to be in the current view, when the subtraction of the current captured image and the background reaches a certain threshold. We...
In this paper, a Web information system for fleet management and transport telematics is described. The system is developed based on MOWIS - a service-oriented open software platform for location-based and context-aware mobile and Web applications. Based on MOWIS services such as routing service, directory service, traffic information service and moving object service, as well as real AVL bus tracking...
The location service is an important component of position-based routing protocols, used for VANETs. A hierarchical structured location service called map based location service (MBLS) is proposed in this paper. The MBLS exploits navigation system by using geographical data file (GDF) from the digital-map database to recruit location servers and to send location updates. Simulation results show that...
The publish/subscribe paradigm is a common concept for delivering events from information producers to consumers in a decoupled manner. Some approaches allow durable subscriptions or the transportation of events even to mobile subscribers in a dynamic network infrastructure. However, in the safety-critical telematics durable delivery of events is not sufficient enough. Short network connectivity time...
Selecting optimal routes to reduce travel time has been an important research area for urban traffic network managements. Various parameters such as route length, average speed and event situations need to be considered in the design of a route guidance system. In this paper, we develop a new navigation system based on the combination of fastest path search algorithm and travel time prediction method...
Internet-based vehicular ad hoc network (IVANET) is an emerging technique that combines a wired Internet and a vehicular ad hoc network (VANET) for providing universal information and service accessibility. A key design optimization technique in IVANETs is to cache the frequently accessed data items in a local storage of vehicles. Since vehicles are not critically limited by the storage/memory space...
Ubiquitous Internet connectivity is very important in present environment. A lot of research has been done to extend Internet connectivity to vehicular ad hoc networks (VANETs). The biggest challenge to achieve this goal is the requirement of pervasive fully networked roadside infrastructure. This requirement is difficult to achieve especially during the initial deployment phase of vehicular networks...
In this paper, we propose a location-release signature scheme based on bilinear pairings for vehicular ad hoc networks (VANETs). Location-release signature is a capsule signature signed by a source location server that becomes valid after the signature arrives at a specific destination location, where a location server publishes some trapdoor information associated with such a destination location...
With the increasing use of vehicles in cargo transport, the collection, processing and transmission of data flow within and outside these vehicles are increasingly complex and important for drivers and goods owners, particularly for remote monitoring and control. There are various forms of vehicle data and hence various types of networking used in different vehicle applications. Based on vehicle information...
This paper analyzes the data access pattern to the gateway cache for the better design of direction-based query scheduling scheme, based on the real-life trajectory data. After defining an advanced route information service in which each vehicle requests the data items associated with all links along the route in the vehicular telematics network, experiments are conducted to investigate the queue...
We consider a queueing system composed of queues distributed at fixed locations in a continuous environment and a mobile server serving the jobs in the queues with spatially varying rates. For a fluid model of this system, we provide a necessary and sufficient stabilizability condition. Then we briefly investigate the question of server trajectory optimization for the problem of draining the initial...
VANET is an ad hoc network composed of highly mobile vehicle nodes. Many routing protocols utilize traffic information as a critical metric for determining optimal message forwarding path. The existing traffic information systems are not suitable for routing decision either because of the huge development and maintenance cost or due to the insufficient information provision. In this paper, a new distributed...
Multimedia messaging service (MMS) is developed from WAP FORUM and WAP protocol, and it pushes the multimedia information such as text, picture and sound to the mobile phone directly by using wap as the main data layer. MMS is becoming the most basic application of value added service. This paper presents a vehicle peccancy management system based on MMS. Through this platform, users can query their...
Vehicle-to-infrastructure (V2I) communication has become an increasingly popular topic in the academia as well as in the industry. Due to WiFi??s pervasiveness, the idea of setting up 802.11 access points along the road provides a practical solution for providing vehicle-to-infrastructure communication. However, due to the limited transmission range of a single WiFi access point, intermittent connectivity...
With the maturation and acceptance of broadband wireless technology and standards (e.g. mobile WiMAX, EVDO, HSPA), forward-looking service providers are beginning to augment their coverage with new broadband wireless networks and offering new higher-speed services. At the same time, we see that on-the-go transit and ride-sharing vehicles are beginning to see a market for offering wireless access throughout...
Internet-based vehicular ad hoc network (IVANET) is an emerging technique that combines a wired Internet and a vehicular ad hoc network (VANET) for developing a next generation of ubiquitous communication infrastructure and improving universal information and service accessibility. A key optimization technique in IVANETs is to cache frequently accessed data items in a local storage of vehicles. Since...
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