| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem wherein RFID reading errors may be neglected in RFID systems in the field of physical distribution. <P>SOLUTION: A radio tag system comprises a plurality of first radio tags, a second radio tag, a reading part, a control part and a registration part. The registration part holds identifiers of the plurality of first radio tags in association with an identifier of the second radio tag. Each first radio tag transmits a radio signal including the identifier of the first radio tag when receiving a predetermined signal. The second radio tag transmits a radio signal including the identifier of the second radio tag when receiving the predetermined signal. When the reading part receives the radio signals from at least one of the plurality of first radio tags and the second radio tag, the control part determines whether or not the radio signals received by the reading part include all the identifiers of the plurality of first radio tags held in a storage device in association with the identifier of the single second radio tag. <P>COPYRIGHT: (C)2009,JPO&INPIT |
