Efficient In-Network Processing of Continuous Grouped Aggregation Queries in Sensor Networks

Inchul SONG  Yohan J. ROH  Myoung Ho KIM  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E98-D   No.4   pp.960-963
Publication Date: 2015/04/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2014EDL8237
Type of Manuscript: LETTER
Category: Data Engineering, Web Information Systems
Keyword: 
grouped aggregation query,  sensor network,  multipath routing,  

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Summary: 
In this letter, we propose an energy-efficient in-network processing method for continuous grouped aggregation queries in wireless sensor networks. As in previous work, in our method sensor nodes partially compute aggregates as data flow through them to reduce data transferred. Different from other methods, our method considers group information of partial aggregates when sensor nodes forward them to next-hop nodes in order to maximize data reduction by same-group partial aggregation. Through experimental evaluation, we show that our method outperforms the existing methods in terms of energy efficiency.