IEEE Gainesville Section Presents



Wireless Sensor Networks with Imaging Sensor Applications





Chang Wen Chen,   Allen S. Henry Distinguished Professor

Department of Electrical and Computer Engineering

Florida Institute of Technology



Place: NEB 201

Time:  4:00-5:00pm, Friday, October 8



Abstract



This talk will first present an overview of wireless sensor
networks. We will then identify technical challenges as well as open
research problems in various areas in wireless sensor networks. We
will then focus our attention on issues related to energy efficient
transmission of imaging sensor data over the wireless sensor
networks. We will present two new schemes in energy efficient image
transmission developed for wireless sensor network applications. The
first scheme addresses a collaborative image transmission problem in
which multiple imaging sensors are deployed to collect visual
information from different viewing points. Simulation results show
that the collaborative image transmission scheme can save
significant transmission energy for imaging sensor networks. The
second scheme aims at designing an energy efficient image
transmission by partitioning very long bit stream into multiple
small fragments and transmitting them in a burst. This way, we can
reduce the control overhead and avoid overhearing, since both long
overhead and frequent overhearing have been identified to cause
unnecessary energy consumption in wireless sensor networks.
Furthermore, it is also desired to transmit small fragments of bit
stream in order to reduce error propagation and therefore to achieve
more reliable image data transmission. Experimental results show
that the multiple bit stream image transmission consistently
outperforms the single bit stream scheme in the case of high bit
error rate, a common channel state for wireless sensor networks.





Brief Biography



Chang Wen Chen is currently Allen Henry Endow Chair Professor and
Director of the Wireless Center of Excellence at Florida Institute
of Technology. He was on the faculty of Electrical Engineering
Department at the University of Rochester from 1992 to 1996, on the
faculty of Electrical and Computer Engineering Department at the
University of Missouri-Columbia from 1996 to 2003. He served as the
Head of Interactive Media Group at David Sarnoff Research
Laboratories from 2000 to 2002.



He has been an Associate Editor for IEEE Trans. Circuits and Systems
for Video Technology since 1997, an Associate Editor for IEEE Trans.
Multimedia since 2002, on the Editorial Board of Journal of Visual
Communication and Image Representation since 2000, and an Associate
Editor for IEEE Multimedia Magazine since 2003. He will serve as
Chair of the Technical Program Committee for ICME2006 to be held in
Toronto, Canada. His research interests include image and video
coding, joint source and channel coding, wireless and Internet
video, wireless sensor networks, and multimedia communication and
networking. His research is supported by NSF, DARPA, NASA, Whitaker
Foundation, and Kodak.



He received his BS from University of Science and Technology of
China in 1983, MSEE from University of Southern California in 1986,
and Ph.D. from University of Illinois at Urbana-Champaign in 1992.