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Thierry Derrmann, "Mobile Network Data Analytics for Intelligent Transportation Systems," PhD Thesis, The Faculty of Sciences, Technology and Communication, University of Luxembourg, February 2018. (Advisor: Thomas Engel; Referees: Raphaƫl Frank and Falko Dressler)


In this dissertation, we explore how the interplay between transportation and mobile networks manifests itself in mobile network billing and signaling data, and we show how to use this data to estimate different transportation supply and demand models. To perform the necessary simulation studies for this dissertation, we present a simulation scenario of Luxembourg, which allows the simulation of vehicular Long-Term Evolu- tion (LTE) connectivity with realistic mobility. We first focus on modeling travel time from Cell Dwell Time (CDT), and show - on a synthetic data set - that we can achieve a prediction Mean Absolute Percentage Error (MAPE) below 12%. We also encounter proportionality between the square of the mean CDT and the number of handovers in the system, which we confirmed in the aforementioned simulation scenario. This motivated our later studies of traffic state models generated from mobile network data. We also consider mobile network data for supporting synthetic population generation and demand estimation. In a study on Call Detail Records (CDR) data from Senegal, we estimate CDT distributions to allow generating the duration of user activities, and validate them at a large scale against a data set from China. In a different study, we show how mobile network signaling data can be used for initializing the seed Origin-Destination (O-D) matrix in demand estimation schemes, and show that it increases the rate of convergence. Finally, we address the traffic state estimation problem, by showing how handovers can be used as a proxy metric for flows in the underlying urban road network. Using a traffic flow theory model, we show that clusters of mobile network cells behave characteristically, and with this model we reach a MAPE of 11.1% with respect to floating-car data as ground truth. The presented model can be used in regions without traffic counting infrastructure, or complement existing traffic state estimation systems.

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Thierry Derrmann

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    author = {Derrmann, Thierry},
    title = {{Mobile Network Data Analytics for Intelligent Transportation Systems}},
    advisor = {Engel, Thomas},
    institution = {The Faculty of Sciences, Technology and Communication},
    location = {Luxembourg, Luxembourg},
    month = {2},
    referee = {Frank, Rapha{\"{e}}l and Dressler, Falko},
    school = {University of Luxembourg},
    type = {PhD Thesis},
    year = {2018},

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