Crosslayer Optimization in Multicast Multi-hop Wireless Sensor Networks
Speaker: Prof. Wei Yu, University of Toronto
When: 2005-08-30 13:00:00
Venue: 78-420
Host: Dr. Raphael Cendrillon
Abstract:In this talk, we present an optimization framework for a wireless sensor
network in which each sensor plays a dual role of observing the
environment and relaying the sensor information. The design of such a
network involves a joint optimization of distributive source coding in the
application layer, routing in the network layer, and wireless power
allocation in the physical layer. We show that the joint optimization
problem for such a sensor network, when solved in the dual domain,
provides a natural separation between the application layer, the network
layer, and the physical layer, with the dual optimization variable
providing the interfaces between the layers. Various effective solutions
are discussed for each module, verifying that our framework may handle the
joint optimization problem in efficiently. In particular, we show that a
distributed optimization approach in both the application layer and the
physical layer can be incorporated into such a framework, enabling
effective problem solution for a broad range of wireless network
scenarios. Finally, we show that multicast applications can also be
included in the framework via the use of network coding.
Biography:Wei Yu received the B.A.Sc. degree in Computer Engineering and Mathematics
from the University of Waterloo, Waterloo, ON, Canada in 1997 and M.S. and
Ph.D. degrees in Electrical Engineering from Stanford University,
Stanford, CA, U.S.A. in 1998 and 2002, respectively. Since 2002, he has
been an Assistant Professor with the Electrical and Computer Engineering
Department at the University of Toronto, Toronto, ON, Canada, where he
also holds a Canada Research Chair. His main research interests include
multi-user information theory, coding, optimization, wireless
communications and broadband access networks. He is currently an Associate
Editor for IEEE Transactions on Wireless Communications and a Guest Editor
for a special issue on Nonlinear Optimization in Communications in the
IEEE Journal on Selected Areas of Communications.
Type: ITEE Seminar
Contact:Dr. Raphael Cendrillon, seminar host (raphael@itee.uq.edu.au)
or Guido Governatori (ITEE seminar co-ordinator)
(guido@itee.uq.edu.au)