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IEICE Transactions on Information and Systems 2008 E91-D(1):15-22; doi:10.1093/ietisy/e91-d.1.15
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Copyright © 2008 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Papers -- Database

Energy-Efficient Processing of Complex Queries over a Wireless Broadcast Data Stream

Yon Dohn CHUNG1 and Chang-Sup PARK2

1 The author is with the Department of Computer Science and Engineering, Korea University, Seoul, Korea. (Corresponding author) E-mail: ydchung{at}korea.ac.kr, 2 The author is with the Department of Internet Information Engineering, The University of Suwon, Suwon, Korea.


  Abstract

Energy-efficiency is one of the main concerns in the wireless information dissemination system. This paper presents a wireless broadcast stream organization scheme which enables complex queries (e.g., aggregation queries) to be processed in an energy-efficient way. For efficient processing of complex queries, we propose an approach of broadcasting their pre-computed results with the data stream, wherein the way of replication of index and pre-computation results are investigated. Through analysis and experiments, we show that the new approach can achieve significant performance enhancement for complex queries with respect to the access time and tuning time.

Key Words: broadcast generation scheme, wireless broadcasting, complex queries, pre-computation, mobile databases

Manuscript received June 19, 2007.


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