NDLI: A robust architecture for distributed inference in sensor networks

Content Provider	IEEE Xplore Digital Library
Author	Paskin, M. Guestrin, C. McFadden, J.
Copyright Year	2005
Description	Author affiliation: Dept. of Comput. Sci., Stanford Univ., CA, USA (Paskin, M.)
Abstract	Many inference problems that arise in sensor networks require the computation of a global conclusion that is consistent with local information known to each node. A large class of these problems-including probabilistic inference, regression, and control problems-can be solved by message passing on a data structure called a junction tree. In this paper, we present a distributed architecture for solving these problems that is robust to unreliable communication and node failures. In this architecture, the nodes of the sensor network assemble themselves into a junction tree and exchange messages between neighbors to solve the inference problem efficiently and exactly. A key part of the architecture is an efficient distributed algorithm for optimizing the choice of junction tree to minimize the communication and computation required by inference. We present experimental results from a prototype implementation on a 97-node Mica2 mote network, as well as simulation results for three applications: distributed sensor calibration, optimal control, and sensor field modeling. These experiments demonstrate that our distributed architecture can solve many important inference problems exactly, efficiently, and robustly.
Sponsorship	IEEE Electron Devices Soc. - Boise Chapter Electrochemistry Soc. ECS IEEE Boise Sect. IEEE EDS Region 6 / SRC Micron Found
Starting Page	55
Ending Page	62
File Size	517413
Page Count	8
File Format	PDF
ISBN	0780392019
DOI	10.1109/IPSN.2005.1440895
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-04-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Tree data structures Message passing Communication system control Computer architecture Robustness Computer networks Distributed algorithms Distributed computing Regression tree analysis Assembly
Content Type	Text
Resource Type	Article

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