Title：Wireless Network Modeling and Simulations
Speaker：Associate Prof. Yi Qian（IEEE Vehicular Technology Society (VTS) Distinguished Lecturer, University of Nebraska-Lincoln）
Host：Associate Prof. Wenjing Li
Time：August 3rd,2015 (Monday) 9:00-11:00 AM
Location：New Research Building Room 610
Abstract：
There has been a great deal of work on multi-hop mobile wireless networks and protocol issues, and research is ongoing to expand the scope and quality of service of these networks. The performance of multi-hop mobile wireless networks is normally studied via simulation over a fixed time horizon using a steady-state type of statistical analysis procedure. However, due to the dynamic nature of the network topology such an approach may be inappropriate in many cases as the network may spend most of the time in a transient or nonstationary state. In this talk we present a performance modeling framework and detailed techniques for analyzing the time varying performance of mobile wireless networks. We demonstrate the performance modeling framework for dynamic behavior of mobile wireless networks, and show the scenarios of modeling and performance analysis for two specific wireless networks: vehicular ad-doc networks & mobile ad-hoc networks. Our approach is a hybrid of discrete event simulation and numerical analysis techniques. Network queues are modeled using fluid-flow based differential equation models which are solved using numerical methods, while node mobility is modeled using either discrete event simulation techniques or stochastic modeling of adjacency matrix elements. Extensions to the basic model include incorporating energy consumption, interference and propagation effects into the hybrid modeling framework to improve its fidelity.
Associate Prof. Yi Qian Bio：
Yi Qian received a Ph.D. degree in electrical engineering from Clemson University. He is an associate professor in the Department of Electrical and Computer Engineering, University of Nebraska-Lincoln (UNL). Prior to joining UNL, he worked in the telecommunications industry, academia, and the government. Some of his previous professional positions include serving as a senior member of scientific staff and a technical advisor at Nortel Networks, a senior systems engineer and a technical advisor at several start-up companies, an assistant professor at University of Puerto Rico at Mayaguez, and a senior researcher at National Institute of Standards and Technology. His research interests include information assurance and network security, network design, network modeling, simulation and performance analysis for next generation wireless networks, wireless ad-hoc and sensor networks, vehicular networks, smart grid communication networks, broadband satellite networks, optical networks, high-speed networks and the Internet. He has a successful track record to lead research teams and to publish research results in leading scientific journals and conferences. Several of his recent journal articles on wireless network design and wireless network security are among the most accessed papers in the IEEE Digital Library. Dr. Yi Qian is a member of ACM and a senior member of IEEE. He is serving on the editorial board for several international journals and magazines, including serving as the Associate Editor-in-Chief for IEEE Wireless Communications Magazine. He is the Chair of IEEE Communications Society Technical Committee for Communications and Information Security. He is a Distinguished Lecturer for IEEE Vehicular Technology Society.
SKL-NST
August 1st,2015
