Radio frequency identification (RFID) tag, portable...

Details Radio frequency identification (RFID) tag, portable... Radio frequency identification (RFID) tag, portable...

2005-12-28

2010-06-15

Wu, Daniel (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010520, C340S005800, C705S022000

Reexamination Certificate

active

07737824

ABSTRACT:
A hierarchical structure is established among a plurality of RFID tags, such that ID numbers can be read only from RFID tags which belong to a particular layer. RFID tag can control whether permission should be given to read its ID number therefrom to protect the ID number. Data held in the RFID tag can be read from the outside. RFID tag comprises a memory circuit having a function of holding data, and a logic circuit having a function of processing a control command received from outside. Memory circuit stores an own ID number for identifying the RFID tag itself, and a parent ID number for identifying a second RFID tag. When RFID tag receives an ID number read command which contains first data as a parameter from outside, the logic circuit outputs the own ID number to outside only when the first data matches the parent ID number.

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“All About RFID Tag”, Nikkei BP Inc., Mar. 17, 2004.

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