BibTeX for papers by David Kotz; for complete/updated list see https://www.cs.dartmouth.edu/~kotz/research/papers.html @InProceedings{kim:mobility, author = {Minkyong Kim and David Kotz and Songkuk Kim}, title = {{Extracting a mobility model from real user traces}}, booktitle = {{Proceedings of the Annual Joint Conference of the IEEE Computer and Communications Societies (INFOCOM)}}, year = 2006, month = {April}, pages = {1--12}, publisher = {IEEE}, copyright = {IEEE}, address = {Barcelona, Spain}, DOI = {10.1109/INFOCOM.2006.173}, URL = {https://www.cs.dartmouth.edu/~kotz/research/kim-mobility/index.html}, abstract = {Understanding user mobility is critical for simulations of mobile devices in a wireless network, but current mobility models often do not reflect real user movements. In this paper, we provide a foundation for such work by exploring mobility characteristics in traces of mobile users. We present a method to estimate the physical location of users from a large trace of mobile devices associating with access points in a wireless network. Using this method, we extracted tracks of always-on Wi-Fi devices from a 13-month trace. We discovered that the speed and pause time each follow a log-normal distribution and that the direction of movements closely reflects the direction of roads and walkways. Based on the extracted mobility characteristics, we developed a mobility model, focusing on movements among popular regions. Our validation shows that synthetic tracks match real tracks with a median relative error of 17\%.}, }