NDLI: Hierarchical Data Management for Spatial-Temporal Information in WSNs

Content Provider	IEEE Xplore Digital Library
Author	Kai-Chao Yang Yuan-Cheng Yang Chun-Lung Lin Jia-Shung Wang
Copyright Year	2010
Abstract	Wireless sensor networks (WSNs) comprise a large number sensor devices with limited power and resource. One of the key design challenges in the sensor networks is to efficiently utilize limited local storage capacity at individual sensor nodes to store historical data and produce fast and approximate responses to user queries. In this article, we propose a hierarchical data caching technique which consists of sensor nodes, cache nodes, and the base station to efficiently answer user queries with different data quality levels. In the proposed system, each sensor node forecasts and summarizes sensed data. Then cache nodes receive and merge the forecasting parameters from sensor nodes, and provide approximate answers to spatial-temporal user queries. Thus transmission cost can be significantly saved. When the accuracy of the response cannot satisfy the user-specified confidence bound, the query will be forwarded to lower levels of the proposed hierarchical architecture for more accurate answers. Besides, we also propose a cache management policy to prevent storage overflow by merging historical forecasting parameters for limited storage capacity of cache nodes. The simulation results illustrate that our caching system can further reduce the transmission overhead. Moreover, the proposed approach in our work consumes fewer computational resources and can still provide satisfactory responses to injected user queries.
Starting Page	435
Ending Page	440
File Size	570992
Page Count	6
File Format	PDF
ISBN	9781424475384
e-ISBN	9781424475377
DOI	10.1109/SENSORCOMM.2010.69
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-18
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Measurement Base stations Wireless sensor networks hierarchical data caching Flash memory Sensor networks linear regression Data models Forecasting Monitoring
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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