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Distributed Continuous Query Processing Scheme for RFID Data Stream  

Ahn, Sung-Woo (Department of Computer Engineering, Puan National University)
Hong, Bong-Hee (Department of Computer Engineering, Puan National University)
Jung, Dong-Gyu (News Service Development Team, NHN Corp.)
Publication Information
Journal of the Institute of Electronics Engineers of Korea CI / v.46, no.4, 2009 , pp. 1-12 More about this Journal
Abstract
An RFID application needs to collect product's information scattered over the RFID network efficiently according to the globalization of RFID applied enterprises. To be informed of the stock status of products promptly in the supply chain network, especially, it is necessary to support queries that retrieve statistical information of tagged products. Since existing RFID network does not provide these kinds of queries, however, an application should request a query to several RFID middleware systems and analyze collected data directly. This process makes an application do a heavy computation for retrieving statistical information. To solve this problem, we define a new Distributed Continuous Query that finds information of tagged products from the global RFID network and provides statistical information to RFID applications. We also propose a Distributed Continuous Query System to process the distributed continuous query efficiently. To find out the movement of products via multiple RFID systems in real time, our proposed system uses Pedigree which represents trade information of items. Our system can also reduce the cost of query processing for removing duplicated data from multiple middleware systems by using Pedigree.
Keywords
RFID;
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