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This article deals with several kernel technologies applied in vehicle information service. The technology referring to GPS (Global Positioning System), GPRS (General Packet Radio Service), GIS (Geographical Information System), and Computer Network etc, as we have studied, is believed to be able to construct a Vehicle Information Service System which faces the public. Synthesizing the technologies...
Ubiquitous Information Systems (ISs) should support mobility of users and reason efficiently on their context to provide relevant and real-time information. ISs should be particularly adaptive and context-aware by managing and responding properly to occurring events. A need of integrating an adaptive and distributed event based system raises to lead to a diversity of proposed approaches and architectures...
The Traffic Probe Message Service will enable traffic managers to gather roadway state data via wireless communication with vehicles. Despite privacy protections specified for the service, it remains vulnerable to inference attacks aimed at reconstructing the path of a vehicle through the roadway. This paper presented a model for evaluating the location privacy in the Traffic Probe Message Service...
Nowadays novel embedded computing devices enable vehicles to form large scale mobile peer-to-peer networks in which they can assist each other to improve their driving experience. Therefore context-aware communication is considered to be vital for inducing inter-vehicular intelligence between groups of vehicles with similar interests. However, traditional network addressing schemes are not well suited...
This paper proposes a novel, nicknamed the "Pinpoint", method for an efficient and robust traffic estimation system using mobile phones as traffic probes. In this approach, the real-time traffic data is collected and sent to the server at the right time by the right players. Only the utilized data is reported to the server by the travelling vehicles. The mobile phones from walkers are prevented...
In order to resolve the vehicles safe protection and monitoring tracing question, proposed GPS vehicle mobile information system's overall framework and corresponding function. This article analyzed information monitoring terminal's system components and detailed design. Combined monitoring system's communication transfer protocol, expounded vehicle navigation control system's components and key technologies...
Many countries in the developing world are currently affected by crises and security threats, including growing rates of regional instability, the proliferation of illegal drugs and weapons, cross border migration and increases to organized crime. It follows that public safety organizations in developing countries are faced with increasingly volatile environments-sometimes in absence of resources...
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...
Vehicular communication systems (VCS) are becoming a cornerstone of modern intelligent transport systems. By enabling vehicles to communicate with each other via inter-vehicle communication as well as with roadside units via roadside-to-vehicle communication, vehicular networks will contribute to safer and more efficient roads by providing timely information to drivers and concerned authorities. This...
This paper demonstrates a framework of context awareness based multimodal connectivity passenger information system for green-intelli travel services for public transit. A critical issue is developing context awareness services to provide a specific user with his/her context demand along the circumstances related to the complex information of transportation infrastructure. Recent technologies including...
Most large cities have severe congestion and environment problems. Many cities could benefit from implementation of congestion tax systems. The City of Stockholm has done this based on large-scale trial enabled by mobile technology. This paper analyzes how mobile technology and mobile business can have major societal impact and create value. The paper is a case study that analyzes the Stockholm congestion...
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...
In this paper we study a feasible resource diffusion scheme for disseminating queries and reports about real-time traffic conditions in vehicular networks, where both ad-hoc communication and infrastructure communication are available. Each disseminated report represents information about a spatial-temporal event, such as a video clip of a cross traffic or the availability of a parking slot at a particular...
The paper introduces the research to develop an active radio frequency identification (RFID) - based national traffic information collection system (TICS) in ubiquitous environments in order to renovate the integrated national traffic management systems. The study of RFID - based traffic collection system mainly focuses on: (i) 2.45 GHz active RFID readers and tags; (ii) RFID middleware and DB structure,...
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...
The objectives of the research include to develop a novel Traffic Information Collection System (TICS) based on RFID, and to create a chance to lead ubiquitous environments in the transportation area.
The existing vehicular sensors of taxi companies in most of cities can be used for traffic monitoring, however sensors are always set with a long sampling interval because of communication cost saving and network congestion avoidance. In this paper, we focus on the traffic data processing in vehicular sensor networks providing sparse and incomplete information. A performance evaluation study has been...
We study the dissemination of data in a vehicular network in which the density of equipped vehicles, or all vehicles, is very low, and in which there is no centrally connected infrastructure, such as a network of gateways. In this environment, a vehicle is rarely in communication range of another vehicle, so that protocols based on forwarding messages along a chain of vehicles in communication range...
This paper describes the preliminary results for detecting slippery road conditions. The detector will be implemented in a larger system intended to increase the safety margin for vehicle drivers, by utilising so-called co-operative driving where infrastructure to vehicle communications operate seamlessly. The ice detection system is based on intensity differences in reflectance for horizontal and...
This paper focuses on intelligent transportation systems. Specifically, we look at data management issues in inter-vehicle ad hoc networks. Such networks are highly dynamic due to the movements of the vehicles and the short range of the wireless communications. Thus, for example, we can only rely on short interactions between the vehicles. Consequently, new data management techniques adapted to this...
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