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Energy Efficient In-network Density Query Processing in Wireless Sensor Networks  

Lee, Ji-Hee (충북대학교 정보통신공학)
Seong, Dong-Ook (충북대학교 정보통신공학)
Kang, Gwang-Goo (충북대학교 정보통신공학)
Yoo, Jae-Soo (충북대학교 정보통신공학)
Abstract
In recent, there have been done many studies on applications that monitor the information of mobile objects using Wireless Sensor Networks (WSN). A density query that finds out an area spread by density that a target object requires in the whole sensing field is a field of object monitoring applications. In this paper, we propose a novel homogeneous network-based in-network density query processing scheme that significantly reduces query processing costs and assures high accuracy. This scheme is based on the possibility-based expected region selection technique and the result compensation technique in order to enhance the accuracy of the density query and to minimize its energy consumption. To show the superiority of our proposed scheme, we compare it with the existing density query processing scheme. As a result, our proposed scheme reduces about 92% energy consumption for query processing, while its network lifetime increases compared to the existing scheme. In addition, the proposed scheme guarantees higher accuracy than the existing scheme in terms of the query result.
Keywords
Wireless Sensor Networks; Density Query; In-Network Processing;
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