G - Physics – 08 – C
Patent
G - Physics
08
C
G08C 17/02 (2006.01) G01V 15/00 (2006.01)
Patent
CA 2469377
Screening systems and protocols are disclosed that are used to screen and identify objects with RFID tags. The screening categorization, RF transmitting-receiving methods and communication protocols are dynamically programmable. An object screening system includes one control centre, one or more broadcast means, one or more tags and one or more detectors. The control centre stores registered tag data including tag IDs and attached object properties, categorizes all tags based on detection requests, and broadcasts commands to tags and detectors, through the broadcast means, in order to set tags' status and operating mode, and synchronize detectors' settings. A tag reports its status to a detector in its vicinity, and the detector selectively sets up a two-way communication with the tag and outputs detected results from the tag. Communication protocols are disclosed that cipher and decipher RF signal massages from a control centre to tags and detectors, from a tag to a detector, and communications between a tag and a detectors, so as to make the object screening system confidential, robust and reliable.
Dong Chunli
Na
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