Query tree based tag identification method in RFID systems

Details Query tree based tag identification method in RFID systems Query tree based tag identification method in RFID systems

2006-12-20

2009-11-03

Lee, Benjamin C (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S870030, C340S010100

Reexamination Certificate

active

07612672

ABSTRACT:
A query tree based tag identification method in RFID systems includes: (a) forming a temporary ID for each of the tags; (b) comparing an inquiry of the reader with a portion of the temporary ID in each tag when receiving the inquiry from the reader; (c) if the inquiry and the portion of the temporary ID are identical to each other, transmitting a remainder of the temporary ID in each tag to the reader; (d) if a collision occurs in the step (c), generating new inquiries for storing them in the reader; (e) if there is no collision in the step (c), transmitting an ACK signal to each tag whose temporary ID is identified to receive its real tag ID therefrom; and (f) repeating the steps (b) to (e) until there is no inquiry in the reader.

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Finkenzeller et al: “RFID-Handbuch” RFID Handbook:Grundlagen und Parktische Anwendungen, pp. 203-224, XP002341283, Sep. 26, 2002.

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