Processing Precision-Constrained Approximate Queries in Wireless Sensor Networks
MDM '06 Proceedings of the 7th International Conference on Mobile Data Management(2006)
摘要
A lot of research efforts have been devoted to improving energy efficiency for wireless sensor networks by exploring distributed data storage and in-network query processing techniques. In this paper, we present a generic two-tier data storage strategy for answering precision-constrained approximate queries in a sensor network. The basic idea is to keep two versions of data in the network. A highprecision version is kept at the sensor node that captures the data while a low-precision version is maintained at the base station. We develop query processing and node refreshment strategies for various types of approximate queries under the two-tier storage. Our extensive experiments show that the two-tier storage strategy outperforms the basic centralized storage scheme by an order of magnitude in terms of network lifetime under various system configur
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关键词
approximate query,basic centralized storage scheme,two-tier storage strategy,sensor node,two-tier storage,wireless sensor network,processing precision-constrained approximate queries,sensor network,network lifetime,data storage,wireless sensor networks,generic two-tier data storage,distributed data storage,energy efficient,base stations,intelligent networks,base station,memory,energy efficiency
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