NDLI: Progressive joint coding, estimation and transmission censoring in energy-centric wireless data gathering networks

Content Provider	IEEE Xplore Digital Library
Author	Howard, S.L. Flikkema, P.
Copyright Year	2008
Description	Author affiliation: EE Dept., Northern Arizona Univ., Flagstaff, AZ (Howard, S.L.; Flikkema, P.)
Abstract	Energy-constrained wireless sensor networks often are designed to measure a spatio-temporal process that is correlated in space, time, or both. The goal of these data-gathering networks is a description of the process that provides the required fidelity with a minimum expenditure of energy. Our approach combines (1) channel coding and estimation/decision processing of coded messages for in-network data censoring with (2) estimation of the encoded and censored information at a fusion center where energy is plentiful. Nodes examine their own messages together with messages from preceding nodes, and compute the fidelity of the estimate at the next node as a function of data censoring proposals. Our algorithm exploits redundancy of two types: intra-message redundancy from channel coding, and inter-message redundancy due to spatio-temporal correlation of the samples. This redundancy is used to alleviate overall energy consumption and message congestion near the fusion center by allowing relaying nodes to censor messages that might otherwise be forwarded, if those messages can be inferred from other messages, given the correlation model. The effect of censoring on fidelity and energy consumption is characterized, and our censoring algorithm shown to provide significant energy savings.
Starting Page	485
Ending Page	490
File Size	1546485
Page Count	6
File Format	PDF
ISBN	9781424425747
DOI	10.1109/MAHSS.2008.4660063
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-09-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computational modeling Estimation Encoding Decoding Proposals Relays Iterative decoding
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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