Radio frequency identification interrogation systems and methods of operating the same
First Claim
1. A reply code for a radio frequency identification (RFID) tag, comprising:
- a preamble having information about a quality of a clock associated with said RFID tag;
a tag identification (ID) code providing a digital signature for said RFID tag; and
an aftamble located aft of said preamble and having information about said quality of said clock, said aftamble cooperating with said preamble to improve a quality of said reply code for interrogation by an interrogator.
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Accused Products
Abstract
A reply code for a radio frequency identification (RFID) tag, a method of improving a reply code for a radio frequency identification (RFID) tag for interrogation by an interrogator and an RFID tag employing the same. In one embodiment, the reply code includes a preamble having information about a quality of a clock associated with the RFID tag. The reply code also includes a tag identification (ID) code providing a digital signature for the RFID tag. The reply code still further includes an aftamble located aft of the preamble and having information about the quality of the clock. The aftamble cooperates with the preamble to improve a quality of the reply code for interrogation by an interrogator.
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Citations
20 Claims
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1. A reply code for a radio frequency identification (RFID) tag, comprising:
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a preamble having information about a quality of a clock associated with said RFID tag;
a tag identification (ID) code providing a digital signature for said RFID tag; and
an aftamble located aft of said preamble and having information about said quality of said clock, said aftamble cooperating with said preamble to improve a quality of said reply code for interrogation by an interrogator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of improving a reply code for a radio frequency identification (RFID) tag for interrogation by an interrogator, comprising:
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providing information about a quality of a clock associated with said RFID tag with a preamble;
providing a digital signature for said RFID tag with a tag identification (ID) code; and
further providing information about said quality of said clock associated with said RFID tag with an aftamble aft of said preamble, said aftamble cooperating with said preamble to improve a quality of said reply code for interrogation by an interrogator. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A radio frequency identification (RFID) tag, comprising:
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an electronic circuit including a clock;
an antenna coupled to said electronic circuit; and
a reply code, including;
a preamble having information about a quality of said clock, a tag identification (ID) code providing a digital signature for said RFID tag, and an aftamble located aft of said preamble and having information about said quality of said clock, said aftamble cooperating with said preamble to improve a quality of said reply code for interrogation by an interrogator. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification