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International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 728521, 11 pages
http://dx.doi.org/10.1155/2012/728521
Research Article

Intelligent Collaborative Event Query Algorithm in Wireless Sensor Networks

College of Computer Science, South-Central University for Nationalities, Wuhan 430074, China

Received 15 June 2011; Accepted 2 August 2011

Academic Editor: Yuhang Yang

Copyright © 2012 Rongbo Zhu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Event query processing is a very important issue in wireless sensor networks (WSNs). In order to detect event early and provide monitoring information and event query timely in WSNs, an efficient intelligent collaborative event query (ICEQ) algorithm is proposed, in which sensor nodes that are near to the boundary of events are selected to accomplish complex event monitoring and query processing through intelligent collaboration. ICEQ will select range-nearest neighbors as the basic components of surrounding nodes. Then it will identify the gaps between the surrounding nodes and try to select the nearest neighbor collaborative nodes for enclosing the event in the node selection phase, which can avoid redundant sensor nodes to join surrounding nodes via identifying a set of association surrounding nodes between the nearest sensor nodes and the query events. Detailed experimental results and comparisons with existed algorithm show that the proposed ICEQ algorithm can achieve better performance in terms of query-processing time, average number of selected collaborative nodes, and query message consumption.