In this talk, I'll present our results obtaining from analyzing a year long wireless network users' mobility trace data collected on ETH Zurich campus. Unlike earlier work, we profile the movement pattern
of wireless users and predict their locations. More specifically, we show that each network user regularly visits a list
of places such as a building (also referred to as hubs) with
some probability. The daily list of hubs, along with their
corresponding visit probabilities, are referred to as a mobility
profille. We also show that over a period of time (e.g.,
a week), a user may repeatedly follow a mixture of mobility
profiles with certain probabilities associated with each
of the profiles. Our analysis of the mobility trace data not
only validate the existence of our so-called sociological orbits in users' movement pattern,  but also demonstrate the advantages of exploiting it in performing hub-level location predictions. In particular,
we show that such profile based location predictions are
more precise than common statistical approaches based on
observed hub visitation frequencies alone. I'll also talk about various kinds of traces, potential applications of the mobility profiling, and future directions.

报告人简历：
Dr. Chunming Qiao directs LANDER, which conducts cutting-edge research work on optical networks, wireless networks, survivable networks, and TCP /IP technologies. He has published more than 70 and 100 papers in leading technical journals and conference proceedings, respectively. His pioneering research on Optical Internet, in particular, the optical burst switching (OBS) paradigm in 1997. Today, OBS has become an active research area being pursued by many R&D groups in both industry and academia world-wide. Several major IEEE conferences in the field (e.g., Infocom, OFC , Globecom, ICC) have had dedicated sessions on OBS. Six international workshops dedicated to OBS have been held since 2003 (www.cse.buffalo.edu/ qiao/wobs/OBSIndex.html), and an OBS forum has also been set up (www.obsforum.org).  In addition, his work on integrated cellular and ad hoc relaying systems (iCAR) is recognized as the harbinger for today's push towards the convergence between heterogeneous wireless technologies, and has been featured in Businessweek and Wireless Europe, as well as at the websites of New Scientists and CBC . His Research has been funded by a number of NSF grants including two ITR awards, and by Alcatel, Fujitsu Labs, NEC Labs, Nokia Research, Nortel, Telcordia, Sprint Advanced Technology Lab, and ITRI . Dr. Qiao have given several keynotes, tutorials and invited talks on the above research topics at conferences and institutions including MIT Lincoln Lab, UCLA, ISI/USC, U. Michigan, U. Toronto etc.. He is on the editorial board of several journals and magazines including IEEE/ACM Transactions on Networking (ToN), and IEEE Communications Magazine, and have guest-edited several IEEE Journal on Selected Areas in Communications (JSAC) and ACM/Baltzer's Journal on Mobile Networks and Applications Journal (MONET) issues. He has chaired and co-chaired a dozen of international conferences and workshops.

报告人主页：http://www.cse.buffalo.edu/~qiao/