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Efficient In-Network Processing of Continuous Grouped Aggregation Queries in Sensor Networks
Inchul SONG Yohan J. ROH Myoung Ho KIM
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2015/04/01
Online ISSN: 1745-1361
Type of Manuscript: LETTER
Category: Data Engineering, Web Information Systems
grouped aggregation query, sensor network, multipath routing,
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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.