Exploiting Diversity in Large-scale Wireless Networks

April 2, 2007
Time: 11:00am-12:00pm
Room 414 CEPSR Schapiro
Speaker: Lei Ying, University of Illinois at Urbana-Champaign


With the development of wireless technology and availability of cheap wireless devices, large-scale wireless networks are becoming a reality. Diversity is an important feature which could be used to improve the performance of wireless networks. For example, in single-transmitter systems, MIMO technology exploits spatial-diversity, and cellular data services exploit multi-user diversity. In this talk, I will explore the advantages and challenges of exploiting diversity using cross-layer techniques in large wireless communication and sensor networks. In particular, two problems will be discussed in this talk. The first problem is symmetric function computation in noisy wireless sensor networks, where we use reception-diversity to combat channel noise and reduce the error of function computation. The second problem is delay-throughput trade-offs in mobile ad-hoc networks, where rate-less codes are used to exploit mobility-diversity and achieve the maximum throughput given delay constraints.

Speaker Biography

Lei Ying received the B.E. degree from Tsinghua University, Beijing, in 2001, and the M.S. degree in Electrical Engineering from University of Illinois at Urbana- Champaign in 2003, where he is currently working towards a Ph.D. degree. He is a recipient of the Vodafone Fellowship (2006 and 2007).

His research interests are in the field of wireless networks, especially in scheduling in wireless networks, mobile ad-hoc networks and wireless sensor networks.

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