Decentralized Utility-based Sensor Network Design |
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Authors: | Narayanan Sadagopan Mitali Singh Bhaskar Krishnamachari |
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Affiliation: | (1) Department of Computer Science, University of Southern California, 941 W. 37th Place, Los Angeles, CA 90089-0781, USA;(2) Department of Computer Science, University of Southern California, 3740 McClintock Ave, EEB 226, Los Angeles, CA 90089-0781, USA;(3) Dept. of Electrical Engineering - Systems, University of Southern California, 3740 McClintock Avenue, EEB 342, Los Angeles, CA 90089, USA |
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Abstract: | Wireless sensor networks consist of energy-constrained sensor nodes operating unattended in highly dynamic environments. In
this paper, we advocate a systematic decentralized approach towards the design of such networks based on utility functions.
A local utility function is defined for each sensor node in the network. While each sensor node “selfishly” optimizes its
own utility, the network as a “whole” converges to a desired global objective. For the purpose of demonstrating our approach,
we consider the following two separate case studies for data gathering in sensor networks: (a) construction of a load balanced
tree and (b) construction of an energy balanced tree. Our work suggests a significant departure from the existing view of
sensor networks as consisting of cooperative nodes, i.e. “selfish”sensor nodes is a useful paradigm for designing efficient
distributed algorithms for these networks.
Narayanan Sadagopan received the B.S. degree in computer science from the Regional Engineering College, Trichy, India, in 1998, and the M.S.
degree in computer science from University of Southern California (USC), Los Angeles, in 2001. He is currently working toward
the Ph.D. degree in the Computer Science Department, USC. His research is focused on theoretical aspects of wireless ad hoc
and sensor networks.
Mitali Singh received the BTech. degree in Computer Science and Engineering from the Indian Institute of Technology, New Delhi, India
in 2000, and the M.S. degree in Computer Science from the University of Southern California, Los Angeles, USA. She is currently
working towards the Ph.D. degree in Computer Science at the University of Southern California. Her research interests lie
in the area of applied theory and networks. Presently, her work is focused on high level modeling and distributed algorithm
design for wireless sensor systems.
Bhaskar Krishnamachari received the B.E.E.E. degree from The Cooper Union for the Advancement of Science and Art, New York, in 1998, and the M.S.E.E.
and Ph.D. degrees in electrical engineering from Cornell University, Ithaca, NY, in 1999 and 2002, respectively. He is now
an Assistant Professor in the Department of Electrical Engineering, University of Southern California, Los Angeles, where
he also holds a joint appointment in the Department of Computer Science. His current research is focused on the discovery
of fundamental principles and the analysis and design of protocols for next-generation wireless sensor networks. |
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