RFID tags replying using changed reply timing

Details RFID tags replying using changed reply timing RFID tags replying using changed reply timing

2011-08-16

2011-08-16

Bugg, George (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S572300, C340S010100, C340S010200

Reexamination Certificate

active

07999675

ABSTRACT:
RFID tags and chips for RFID tags are capable of replying using changed reply timing. In a number of embodiments, this timing change is achieved when a tag receives a custom timing command from an RFID reader. In some embodiments, the changed reply timing affects an amount of delay before a tag backscatters a reply.

REFERENCES:
patent: 2004/0046645 (2004-03-01), Atkins et al.
patent: 2006/0061475 (2006-03-01), Moskowitz et al.
patent: 2006/0143163 (2006-06-01), Smith et al.
patent: 2007/0075838 (2007-04-01), Powell
patent: 2008/0111661 (2008-05-01), Lin et al.
Specification for RFID Air Interface: EPC™ Radio-Frequency Identity Protocols Class-1 Generation-2 UHF RFID Protocol for Communications at 860 MHz—960 MHz Version 1.1.0. 2004-2006 EPCglobal, Inc. Dec. 17, 2005: 1-100.
Smart Card Alliance Identity Council. “Countless Smart Cards vs. EPC Gen 2 RFID Tags: Frequently Asked Questions.” Smart Card Alliance (2006). Jul. 2006: 1-6.

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