Edward Chlebus

  • Industry Professor of Computer Science

Research Interests

Edward Chlebus received his M.S. and Ph.D. degrees in electrical engineering from Cracow University, Poland in 1985 and 1990, respectively. From 1985 to 1992 he was a research assistant and an assistant professor at the Telecommunications Department of Cracow University. In the academic year 1988/89 he visited the Laboratoire d'Analyse et d'Architecture des Systemes (LAAS-CNRS) in Toulouse, France. His research was sponsored by France Telecom Research & Development Center in Paris. From October 1992 to December 1994 he was a research fellow at the Teletraffic Research Centre of the University of Adelaide, Australia. Funding for his research was provided by Telecom Australia Research Laboratories in Melbourne. Between 1995 and 1997 Dr. Chlebus worked on various performance aspects of mobile satellite systems at Motorola Satellite Communications Division in Chandler, Arizona. From 1997 to 2001 he was with the Wireless Architecture and Performance Department of Bell Laboratories in Naperville, Illinois where he was involved in design, modeling and performance analysis of wireless communications systems. From 2000 to 2001 Dr. Chlebus was an expert of the International Telecommunication Union Standardization Sector (ITU-T) in Geneva, Switzerland. Since 2001 he has been with the faculty of the Computer Science Department of Illinois Institute of Technology where he is currently an industry associate professor and director of the Network Modeling and Teletraffic Analysis Lab (NEMTAL).

Dr. Chlebus' main research interests include network modeling, tele traffic engineering, Internet mathematics and performance evaluation of computer and communications systems. His seminal paper "Is handoff traffic really Poissonian?", published in Proc. of 4th IEEE International Conference on Universal Personal Communications, ICUPC'95, Tokyo, Japan, Nov. 6-10, 1995, pp. 348-353 started the systematic investigation of statistical properties of handoff traffic in wireless mobile systems and initiated publishing new results in this area.

He serves as an editor of The Open Information Systems Journal and is a frequent reviewer of IEEE journals and conferences.

Dr. Chlebus won the 1985 Best MS Thesis Award given by the Association of Polish Electrical Engineers (SEP) and the 1990 and 1991 Best Paper Awards of the Polish Symposium on Communications. He was also an advisor of the thesis winning the 1992 SEP Best MS Thesis Award.


Divgi G., Chlebus E., The impact of Internet access account categories on user and traffic in a commercial nationwide Wi-Fi hotspot network, Proc. 5th IEEE Consumer Communications and Networking Conference, CCNC'08, Las Vegas, NV, Jan. 2008

Chlebus E., Divgi G., A novel probability distribution for modeling Internet traffic and its parameter estimation, Proc. 50th IEEE Global Communications Conference, GLOBECOM'07, Washington, DC, Nov. 2007

Divgi G., Chlebus E., User and traffic characteristics of a commercial nationwide Wi-Fi hotspot network, Proc. 18th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07, Athens, Greece, Sept. 2007

Chlebus E., Brazier J., Nonstationary Poisson modeling of web browsing session arrivals, Information Processing Letters, vol. 102, no. 5, May 2007, pp. 187-190, (Elsevier)

Chlebus E., Zbiezek T., Traffic modeling in wireless mobile systems by means of ring and toroidal cell layouts: Performance comparison and validation against measurement data, Computer Communications, vol. 30, no. 5, March 2007, pp. 1116-1121, (Elsevier)

Chlebus E., Divgi G., The Pareto or truncated Pareto distribution? Measurement-based modeling of session traffic for Wi-Fi wireless Internet access, Proc. IEEE Wireless Communications and Networking Conference, WCNC'07, Hong Kong, March 2007

Ohri R., Chlebus E., E-mail traffic conduct and quantification in heterogeneous environments, Proc. 4th International Working Conference on Performance Modelling and Evaluation of Heterogeneous Networks, HET-NETs'06, Ilkley, West Yorkshire, UK, Sept. 2006

Chlebus E., Ohri R., Estimating parameters of the Pareto distribution by means of Zipf's law: Application to Internet research, Proc. IEEE Global Communications Conference, GLOBECOM'05, St. Louis, MO, Nov. 2005

Ohri R., Chlebus E., Measurement-based e-mail traffic characterization, Proc. 2005 International Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'05, Philadelphia, PA, July 2005

Edward Chlebus

Contact Information

312.567.5712 312.567.5067 Stuart Building 218D