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Non-contact IC tag system

  • US 7,145,458 B2
  • Filed: 12/13/2004
  • Issued: 12/05/2006
  • Est. Priority Date: 07/07/2004
  • Status: Expired due to Fees
First Claim
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1. A non-contact IC tag system comprising:

  • a plurality of non-contact IC tags, each of which includes identification information and a memory for storing a predetermined amount of data; and

    a reader/writer that sends an operation command via radio to each of the non-contact IC tags, whereinthe non-contact IC tags include a plurality of slave IC tags and a master IC tag, andthe master IC tag holds memory configuration information that is used when building a memory space with a memory area of the memory of each of the slave IC tags and a memory area of the memory of the master IC tag wherein the reader/writer includesa memory control unit that stores identical data redundantly in at least two of the non-contact IC tags; and

    a readout control unit that, when data cannot be read out from a predetermined non-contact IC tag in which the data is stored by the memory control unit, controls to read out the data from other non-contact IC tag in which the data is stored redundantly.

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