Communications: electrical – Selective – Interrogation response
Reexamination Certificate
2006-07-18
2006-07-18
Holloway, III, Edwin C. (Department: 2635)
Communications: electrical
Selective
Interrogation response
C370S314000, C370S311000, C370S336000, C340S572100
Reexamination Certificate
active
07079009
ABSTRACT:
Arbitration of multiple transponders, such as RFID tags, occurs in an interrogation field. The arbitration process is custom-tailored for individual applications, under software control, by the transponder reader or tag reader. Different wake-up slots are calculated for each tag during successive transmission cycles based upon the tag ID and the transmission cycle number. The tag reader may also send a special command to a tag to read its data and cause the tag to become decoupled from the environment. The tags may be selectively placed in either a tag-talk-first mode or a reader-talk-first mode. Furthermore, the tag reader may send a special fast read command to the tag which includes a read request and at least one parameter of the read request.
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Alexander Samuel
Benedetti Riccardo
Furey Lee R.
Gallagher, III William F.
Inui Shinichiro
Caesar Rivise Bernstein Cohen & Pokotilow Ltd.
Checkpoint Systems Inc.
Holloway III Edwin C.
Microchip Technology Incorporated
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