RFID interrogator and RFID-interrogator control method

Details RFID interrogator and RFID-interrogator control method RFID interrogator and RFID-interrogator control method

2011-03-08

2011-03-08

Lee, Benjamin C (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S010310, C340S539130, C340S010100, C340S003410

Reexamination Certificate

active

07902982

ABSTRACT:
A nonresponse-ratio determining unit determines, after starting a signal transmission to an electronic tag, whether a ratio of number of nonresponses from the electronic tag exceeded a predetermined value in a first predetermined period. A signal-transmission terminating unit terminates, when it is determined that the ratio of the number of nonresponses exceeded the predetermined value, the signal transmission for a second predetermined period. A radio-frequency-identification interrogator performs, after a lapse of the second predetermined period, a communication-channel selecting process for restarting the signal transmission to the electronic tag.

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“Electromagnetic Compatibility and Radio Spectrum Matters (ERM); Radio Frequency Identification Equipment Operating in the Band 865 MHz to 868 MHz with Power Levels Up to 2 W; Part 1: Technical Requirements and Methods of Measurement,”ETSI EN302 208-1, V1.1.1 (Sep. 2004).

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