Date: Monday, September 20th, 2010, 2:30PM, SB 104 AUD
Title: Control-Free Spectrum Access for Cognitive Radio Networks and the Design of Sensor Payload for Sounding Rocket
Speaker: Min Song -- Old Dominion University (ECE)
Dynamic spectrum access promises to resolve the problems of spectrum scarcity and low spectrum utilization caused by today's static spectrum access policy. The basic idea of dynamic spectrum access is that secondary users dynamically search and access spectrum bands that are temporarily unused by primary users. In this talk, Dr. Song will present a control-free algorithm for cognitive radio networks. The algorithm enables each cognitive node to select its operation channel without exchanging any control messages with its neighbors. The novel feature of the algorithm is that such an independently selected channel can reach neighbors with a high probability, while streamlining control complexity and overhead in dynamic spectrum access. An analytical model is developed to evaluate the performance. Numerical results show that the control-free algorithm can achieve very good performance. In this talk, Dr. Song will also present his contribution to the field of wireless communications in spacecraft. Specifically, Dr. Song will introduce his design of wireless sensor payload for sounding rocket. The objectives of this project are to explore the use of low-cost sensor elements and commercial off the shelf devices for space access, to prototype and produce a wireless sensor payload, and to test the payload in a mock spacecraft environment as well as in real-world.
Min Song is an Associate Professor in the Department of Electrical and Computer Engineering at Old Dominion University. He received his PhD in Computer Science from the University of Toledo in 2001. His research interests include design, analysis, and evaluation of cognitive radio networks, wireless sensor networks, wireless mesh networks, WLAN, and mobile ad-hoc networks. Over the years, he has secured funding from NSF, DOE, NASA, ODU, and local industry, and published numerous journal and conference papers. Dr. Song is the recipient of NSF CAREER Award and the recipient of DOE GAANN Award. In addition to his academic work Dr. Song was also the Funding Director of a Networking System Division in an IT company, and launched an international journal and served as the Editor-in-Chief. Dr. Song is an IEEE Senior member.