Abstract
Use of mobility models to model user movement in mobile networks is a key aspect when developing and evaluating networking protocols in simulators. A trace obtained from an actual user movement is considered as being more realistic than using synthetic mobility models in simulators. Though realistic, usually, these traces lack information about the actual wireless contact durations between users. Most simulators use Unit Disk Graph (UDG) model to determine contact durations. However, due to the nature of radio propagations, a simplistic connectivity model (with UDG) may result in simulating unrealistic connectivity patterns. In this work, we have used an Android Smartphone application to collect GPS traces of moving users and their corresponding Bluetooth Low Energy (BLE) contact times to compare the viability of using UDG to determine contact durations. The results show that trace based model with UDG based wireless connectivity is an effective method to determine contact durations.
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BluetoothContacts: https://play.google.com/store/apps/details?id=de.uni_bremen.comnets.BluetoothContacts, developed by Jens Dede and Sarmad Ghafoor.
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Acknowledgements
This work was partly supported by the National Natural Science Foundation of China (61371188). Ju Liu is the contact author of this paper. Liu Sang was supported by the China Scholarship Council for a year of study at the Sustainable Communication Networks, University of Bremen, Germany.
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Sang, L., Kuppusamy, V., Förster, A., Udugama, A., Liu, J. (2017). Validating Contact Times Extracted from Mobility Traces. In: Puliafito, A., Bruneo, D., Distefano, S., Longo, F. (eds) Ad-hoc, Mobile, and Wireless Networks. ADHOC-NOW 2017. Lecture Notes in Computer Science(), vol 10517. Springer, Cham. https://doi.org/10.1007/978-3-319-67910-5_20
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DOI: https://doi.org/10.1007/978-3-319-67910-5_20
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