Otedama : A Relocatable RFID Information Repository Architecture

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    • NAKAMURA Osamu
    • Faculty of Environment and Information Studies, Keio University
    • MURAI Jun
    • Faculty of Environment and Information Studies, Keio University


We present a novel RFID middleware architecture, Otedama, which makes use of a unique property of RFID information to improve performance. RFID tags are bound to items. New information related to an RFID tag is generated at the site where the ID exists, and the entity most interested in the history and the item itself is in close proximity to the RFID tag. To exploit this property, we propose a scheme which bundles information related to a specific ID into one object and moves that bundle to a nearby server as the RFID tag moves from place to place. By using this scheme, information is always accessible by querying a system near the physical location of the tag, providing better query performance. Additionally, the volume of records that must be kept by a repository manager is reduced, because the relocation naturally migrates data away as physical objects move. We show the effectiveness of this architecture by analyzing data from a major retailer, finding that information retrieval performance will be six times better, and the cost of search is possibly several times cheaper.


  • IEICE Transactions on Information and Systems  

    IEICE Transactions on Information and Systems 93(11), 2922-2931, 2010-11-01 

    The Institute of Electronics, Information and Communication Engineers

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