IEEE Winnipeg Section


Communications Chapter Seminar


Network Modulation: A New Dimension to Enhance Wireless Network Performance


Friday, September 16, 2011 at 1:00 pm


Room E2-361, EITC, University of Manitoba, Fort Garry Campus


Dr. Lin Cai
Associate Professor
Department of Electrical and Computer Engineering
University of Victoria, Canada


We have witnessed the explosive growth of the Internet, and the growth will even accelerate in the coming few decades, thanks to the ever-increasing demand for ubiquitous network services, anywhere, anytime, and with any devices. New applications, communication technologies and paradigms are the main driven forces, and they also bring many new challenges. Cross-layer protocol design and optimization is a promising direction for next generation wireless networks. In this talk, we introduce an approach called network modulation which gives us a new dimension to improve wireless network throughput and save energy. In current wireless systems, when a source transmits data to the receiver through a single-hop or multi-hop wireless path, the physical layer modulates and demodulates the information bits hop-by-hop, and the transmission over each hop is treated the same as in a point-to-point communication link. Given the broadcast nature of wireless medium and the wide variation of wireless channel quality, we let a sender transmit messages to multiple receivers simultaneously, using a software mapping technology, called network modulation, to redefine the constellation of typical quadrature amplitude modulation (QAM) schemes. Network modulation can be used to improve network performance in a wide range of scenarios, for anycast (broadcast, multicast and unicast) services, one-way or two-way traffic, and single-hop or multi-hop wireless paths, in infrastructure or ad hoc networks.

Speaker Bio:

Lin Cai received her M.A.Sc. and PhD degrees (awarded Outstanding Achievement in Graduate Studies) in electrical and computer engineering from the University of Waterloo, Waterloo, Canada, in 2002 and 2005, respectively. Since 2005, she has been an Assistant Professor and then an Associate Professor with the Department of Electrical & Computer Engineering at the University of Victoria. Her research interests span several areas in wireless communications and networking, with a focus on network protocol and architecture design supporting emerging multimedia traffic over wireless, mobile, ad hoc, and sensor networks. She has been a recipient of the NSERC Discovery Accelerator Supplement Grant in 2010, the best paper award of IEEE ICC 2008, and the best academic paper award of IEEE WCNC 2011. She has served as a TPC symposium co-chair for IEEE Globecom’10, and the Associate Editor for IEEE Transactions on Wireless Communications, IEEE Transactions on Vehicular Technology, EURASIP Journal on Wireless Communications and Networking, International Journal of Sensor Networks, and Journal of Communications and Networks (JCN).


For questions or more information: Ekram Hossain 474-8908.

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