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Traffic congestion has become a worldwide problem, seriously restricting the performance of transport network. Association of congested links is an essential factor in the formation of traffic congestion, while it lacks enough research. In this paper, a methodology ARM-K combining K-means clustering and association rules mining is proposed to discover the relations of congested links. Specifically,...
This paper presents a positioning method through rasterization of MR (Measurement Report) data. MR data consists of numerous wireless information except longitude/latitude data. MR raster positioning method is used to calculate the relevant longitude/latitude information of MR data and group them into corresponding clusters. compared to conventional drive test and call quality test method, MR raster...
Using an existing large-scale realistic discrete event simulation model of a mobile distributed system we model the infrastructure and dependencies of 2G, 3G and 4G mobile data networks. We investigate the effects of the different network generations and of transitioning connections between networks on the typical behaviour of the distributed system. In particular we enable the model to simulate regional...
The European Electronic Toll Service (EETS) allows different possibilities for the overall system design of interoperable toll systems. We study the effect of the overall system design on the operational costs using a model based, holistic, executable specification. The model is set up to give an accurate description of the interdependences as seen in the German toll system. Two different scenarios...
The aim of our research is to provide a better understanding of the technical differences between the functional solutions for satellite-based tolling in Europe. In addition our research is aimed at evaluating the processing requirements and communication load among three tolling entities, namely: the European Electronic Toll Service, a Toll Charger and On-Board Equipment. Three functional solutions...
Simulations of mobile networks require the specification of the node movement. The movement is either computed based on mathematical models or given by previously recorded mobility traces. The Mobile Node Trace Generator (MoNoTrac) is a mobility trace generator based on OpenStreetMap data. The simulation area is selected from a real city map and the movement of nodes of different kinds, such as cars...
With the rapid development of the wireless internet and mobile computing, more and more mobile-based services penetrate in business and personal life. Among them, LBS is one of the more significant services. So taken the multi-scale road network datasets in LBS as examples, this paper focuses on the multi-scale modeling, representation, and adaptive visualization for spatial data from the view of...
With the widespread use of PDAs, wireless internet, Internet-based GIS, 3G and 4G telecommunications, the technology supporting mobile GIS is rapidly gaining popularity and effectiveness. research on employing geographic data on mobile devices has received a substantial boost, due to the growing availability and increasing power of PDAs and cellular phones. However, a whole and general modeling and...
With the advent of pervasive systems and positioning technologies, a huge trajectory data related to moving objects is generated but not efficiently exploited by decision makers. Trajectory data warehouse seems to be a right repository for this kind of data. The aim of this work is to design a Trajectory data warehouse to gather trajectory data collected partially by mobile professionals for analysis...
This paper proposes a physical statistical modelling of the land mobile satellite (LMS) propagation channel in various types of environments at L- and S-bands. Of particular interest are the land mobile satellite scenarios including buildings and forested areas. The channel is assumed to be constituted of two independent components namely the shadowing direct signal and the diffuse multipath. Both...
Idea of accessing broadband services from already deployed WiFi APs while travelling at vehicular speed has gained considerable popularity among the researchers. Random location of APs makes it difficult to get continuous Internet connection. As a result, a mobile node moving at vehicular speed faces periods of connections and disconnections; this intermittence is termed as "disruption"...
This paper proposes and discusses the modification and extension of the present radio frequency identification (RFID) system using it for vehicular communication system to route post-accident warning messages up to an effective NLOS distance in a cooperative manner. In a vehicular communication system, routing of warning messages in a co-operative manner increases vehicle safety and reduces mass crash,...
Mobile mapping is a new way of efficiently collecting three-dimensional data from the road environment. Mobile mapping systems are cost efficient and robust technique to acquire information about even highly dynamic environments like highways and urban streets, where the data collection has previously been laborious and even dangerous for the staff performing the surveying. The dynamic mobile mapping...
This paper shows an approach to the evaluation of mission scenarios that involves motion and mobile network communications for groups of vehicles, using the Hybrid Operational Protocol Evaluation (HOPE) tool. HOPE is a framework that combines simulation models of communication protocols, terrain maps, link budget reporting services, scenario network visualizations, statistics gathering and displays,...
In this paper we propose a robust system for window detection using popular descriptive statistics and image based methods, making use of 3D information from a laser scanner. The scanner generates 3D point clouds containing intensity and distance information in a spherical coordinate system, with optional additional RGB texture information. The applied descriptive statistical method exploits basic...
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