| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that cards may respond to calls from a reader/ writer using different methods, and there is a case where the number of cards is unclear, in a method of preventing collision between a plurality of noncontact IC cards when communicating with the cards, if there are a plurality of kinds of responses from one noncontact IC card. <P>SOLUTION: The ID of a card included in a response from a noncontact card reader is preserved for comparison. <P>COPYRIGHT: (C)2003,JPO |
