University of Minnesota
University Relations
myU OneStop

Go to unit's home.

Home | Seminars and Symposia | Past seminars/symposia: Thursday, April 28, 2005

DTC Science and Technology Innovators Lecture Series

Recent Advances in Wireless and Mobile Systems


Dharma P. Agrawal
Computer Science & Engineering
ECECS, University of Cincinnati, Cincinnati, OH

Thursday, April 28, 2005
4:30 p.m. Reception
5:00 p.m. Seminar

402 Walter Library

Dharma P. Agrawal

WIRELESS AND MOBILE SYSTEMS ARE GROWING AT A BREATH TAKING PACE and are influencing the way people live and interact. The persuasiveness of mobile computing is being felt not only by the business, but also by each household. The characteristic of anywhere, anytime, any device access to information is a reality and future of mobile computing seems to be very promising. In this presentation, we describe basics of how wireless cell phones work, how mobility is supported, what is the underlying infrastructure and what are recent advances, highlighting potential application areas. Then, we summarize research work being carried out by our research center in three areas. We examine the impact of exponentially increasing contention window on 802.11-class protocols and show that the packet size and offered load have dominant impact on the throughput of APs and MANETs. We indicate various design considerations of sensor networks in terms of energy efficiency and scalability and illustrate the usefulness of multiple paths routing in providing load balancing and service differentiation. Finally, we address a number of vital issues in securing Internet and MANETs.


Dharma P. Agrawal is the Ohio Board of Regents Distinguished Professor of Computer Science and Engineering and the founding director for the Center for Distributed and Mobile Computing in the Department of ECECS, University of Cincinnati, OH. He has been a faculty member at the N.C. State University, Raleigh and the Wayne State University. His current research interests include energy efficient routing, information retrieval, and secured and efficient communication in ad hoc and sensor networks, effective handoff handling and multicasting in integrated wireless networks, interference analysis in piconets and routing in scatternet, use of smart directional antennas for enhanced QoS, and handoff/routing in heterogeneous networks. He has published several books and over 400 papers. His recent co-authored textbook Introduction to Wireless and Mobile Systems has been published by Brooks/Cole which has been specifically designed for Computer Science & Engineering students. He is an editor for the Journal of Parallel and Distributed Systems and the International Journal of High Speed Computing, founding Editorial Board Member, International Journal on Distributed Sensor Networks, International Journal of Ad Hoc and Ubiquitous Computing (IJAHUC), and International Journal of Ad Hoc & Sensor Wireless Networks. He has served as an editor of the IEEE Computer magazine, and the IEEE Transactions on Computers. He has been the Program Chair and General Chair for numerous international conferences and meetings. He has received numerous certificates from the IEEE Computer Society. He was awarded a "Third Millennium Medal," by the IEEE for his outstanding contributions. He has also delivered keynote speech for five international conferences. He also has four patents in wireless networking area. He is a Fellow of the IEEE, the ACM, the AAAS and the World Innovation Foundation.