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Proceedings Paper

High-speed readout method of ID information on a large amount of electronic tags
Author(s): Wataru Nagate; Masahiro Sasabe; Hirotaka Nakano
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Paper Abstract

An electronic tag such as RFID is expected to create new services that cannot be achieved by the traditional bar code. Specifically, in a distribution system, simultaneous readout method of a large amount of electronic tags embedded in products is required to reduce costs and time. In this paper, we propose novel methods, called Response Probability Control (RPC), to accomplish this requirement. In RPC, a reader firstly sends an ID request to electronic tags in its access area. It succeeds reading information on a tag only if other tags do not respond. To improve the readout efficiency, the reader appropriately controls the response probability in accordance with the number of tags. However, this approach cannot entirely avoid a collision of multiple responses. When a collision occurs, ID information is lost. To reduce the amount of lost data, we divide the ID registration process into two steps. The reader first gathers the former part of the original ID, called temporal ID, according to the above method. After obtaining the temporal ID, it sequentially collects the latter part of ID, called remaining ID, based on the temporal ID. Note that we determine the number of bits of a temporal ID in accordance with the number of tags in the access area so that each tag can be distinguishable. Through simulation experiments, we evaluate RPC in terms of the readout efficiency. Simulation results show that RPC can accomplish the readout efficiency 1.17 times higher than the traditional method where there are a thousand of electronic tags whose IDs are 128 bits.

Paper Details

Date Published: 2 October 2006
PDF: 9 pages
Proc. SPIE 6387, Next-Generation Communication and Sensor Networks 2006, 63870J (2 October 2006); doi: 10.1117/12.685791
Show Author Affiliations
Wataru Nagate, Osaka Univ. (Japan)
Masahiro Sasabe, Osaka Univ. (Japan)
Hirotaka Nakano, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 6387:
Next-Generation Communication and Sensor Networks 2006
Mohammed Atiquzzaman; Sergey I. Balandin, Editor(s)

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