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1.
A cellular network database for fingerprint positioning systems
Donatella Gubiani, Paolo Gallo, Andrea Viel, Andrea Dalla Torre, Angelo Montanari, 2019, published scientific conference contribution

Abstract: Besides being a fundamental infrastructure for communication, cellular networks are increasingly exploited for positioning via signal fingerprinting. Here, we focus on cellular signal fingerprinting, where an accurate and comprehensive knowledge of the network is fundamental. We propose an original multilevel database for cellular networks, which can be automatically updated with new fingerprint measurements and makes it possible to execute a number of meaningful analyses. In particular, it allows one to monitor the distribution of cellular networks over countries, to determine the density of cells in different areas, and to detect inconsistencies in fingerprint observations.
Keywords: Cellular network, Signal fingerprinting, Multilevel database, Data analysis
Published in RUNG: 17.09.2019; Views: 3663; Downloads: 0
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2.
A map-matching algorithm dealing with sparse cellular fingerprint observations
Andrea Dalla Torre, Paolo Gallo, Donatella Gubiani, Chris Marshall, Angelo Montanari, Federico Pittino, Andrea Viel, 2019, original scientific article

Abstract: The widespread availability of mobile communication makes mobile devices a resource for the collection of data about mobile infrastructures and user mobility. In these contexts, the problem of reconstructing the most likely trajectory of a device on the road network on the basis of the sequence of observed locations (map-matching problem) turns out to be particularly relevant. Different contributions have demonstrated that the reconstruction of the trajectory of a device with good accuracy is technically feasible even when only a sparse set of GNSS positions is available. In this paper, we face the problem of coping with sparse sequences of cellular fingerprints. Compared to GNSS positions, cellular fingerprints provide coarser spatial information, but they work even when a device is missing GNSS positions or is operating in an energy saving mode. We devise a new map-matching algorithm, that exploits the well-known Hidden Markov Model and Random Forests to successfully deal with noisy and sparse cellular observations. The performance of the proposed solution has been tested over a medium-sized Italian city urban environment by varying both the sampling of the observations and the density of the fingerprint map as well as by including some GPS positions into the sequence of fingerprint observations.
Keywords: Map-matching algorithm, trajectory, cellular fingerprint, Hidden Markov Model
Published in RUNG: 11.06.2019; Views: 3655; Downloads: 97
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3.
Map matching with sparse cellular fingerprint observations
Andrea Viel, Donatella Gubiani, Paolo Gallo, Angelo Montanari, Andrea Dalla Torre, Federico Pittino, Chris Marshall, 2018, published scientific conference contribution

Keywords: map matching, fingerprint, trajectories
Published in RUNG: 09.12.2018; Views: 3959; Downloads: 0
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4.
Dealing with network changes in cellular fingerprint positioning systems
Andrea Viel, Paolo Gallo, Angelo Montanari, Donatella Gubiani, Andrea Dalla Torre, Federico Pittino, Chris Marshall, 2017, published scientific conference contribution

Abstract: Besides being a fundamental infrastructure for communication, cellular networks are exploited for positioning through signal fingerprinting. Maintaining the fingerprint database consistent and up-to-date is a challenging task in many fingerprint positioning systems, e.g., in those populated by a crowd-sourcing effort. To this end, detecting and tracking the changes in the configurations of cellular networks over time is recognized as a relevant problem. In this paper, we show that to cope with this problem we can successfully exploit information provided by Timing Advance (TA). As a by-product, we prove that TA can improve the fingerprint candidate selection phase, reducing the number of fingerprints to provide as input to positioning algorithms. The effectiveness of the proposed improvements has been tested on a fingerprint positioning system with a large fingerprint dataset collected over a period of 2 years.
Keywords: fingerprint positioning systems, cellular communication networks, network changes
Published in RUNG: 13.06.2018; Views: 4210; Downloads: 0
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5.
Un approccio graph-theoretic alla progettazione di basi di dati XML guidato dal tipo e dalla frequenza delle interrogazioni.
Federico Torzo, 2015, undergraduate thesis

Keywords: databases design, XML schema, algorithms, graph theory
Published in RUNG: 12.07.2017; Views: 4321; Downloads: 0
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6.
Un sistema per la gestione efficiente della raccolta dei rifiuti a domicilio: calcolo dei percorsi.
Alessio Gonella, 2014, undergraduate thesis

Keywords: algorithms, routing problem, waste collection
Published in RUNG: 11.07.2017; Views: 4257; Downloads: 0
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7.
Un sistema di supporto alla raccolta dei rifiuti a domicilio: strumenti per la gestione di una flotta di veicoli.
Paolo Snidaro, 2015, undergraduate thesis

Keywords: algorithms, vehicle routing problem, waste collection
Published in RUNG: 11.07.2017; Views: 4376; Downloads: 0
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8.
Dealing with network changes and trajectories in patio-temporal databases for positioning systems
Andrea Viel, 2015, master's thesis

Keywords: database, positioning systems, cellular network
Published in RUNG: 25.01.2017; Views: 4568; Downloads: 0
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9.
A spatio-temporal database for positioning systems: the case of CellLocate
Marco Tosolini, 2014, master's thesis

Keywords: database, positioning systems, cellular network
Published in RUNG: 25.01.2017; Views: 4673; Downloads: 0
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10.
An automated system for dynamic management of SUAP
2014, master's thesis

Keywords: automated system, dynamic management, productive activities, public administration, database design, web system
Published in RUNG: 28.11.2016; Views: 4899; Downloads: 0
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