| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a data reading error from an RFID tag in a communication system composed of the RFID tag and a reader/writer. <P>SOLUTION: In a communication system composed of an RFID tag 20 having a function for information recording and a function for radio communication with the outside and a reader-writer 60 that writes/reads information in/from the RFID tag 20 via radio communication, the RFID tag 20 being transmittable both in an FM modulation mode and an AM modulation mode; when information is transmitted from the RFID tag 20 to the reader/writer 60 in a communication mode of the RFID tag 20, which is one modulation mode out of the FM modulation mode and the AM modulation mode, and the signal transmitted in the modulation mode cannot be decrypted by the reader/writer 60, the relevant information is transmitted in the communication mode of the RFID tag 20, which is the other modulation mode out of the FM modulation mode and the AM modulation mode. <P>COPYRIGHT: (C)2012,JPO&INPIT |
