RF systems and methods for tracking and singulating tagged items
First Claim
1. A method, comprising:
- scanning a zone in an active mode at a first power level for identifying presence of a tag, the tag using at least some battery power to respond to the scanning in the active mode; and
scanning portions of the zone in a passive mode at a second power level for again identifying presence of the tag, the tag not using battery power to respond to the scanning in the passive mode.
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Accused Products
Abstract
A method in one embodiment comprises scanning a zone in an active mode at a first power level for identifying presence of a tag; and scanning portions of the zone in a passive mode at a second power level for again identifying presence of the tag. A system in another embodiment comprises an interrogator for scanning a zone in an active mode at a first power level for identifying presence of a tag; wherein the interrogator also scans portions of the zone for again identifying presence of the tag. A method in another embodiment comprises scanning zones of an area in an active mode for identifying the zone in which the tag is located; and scanning portions of the zone in which the tag is located in a passive mode for identifying the portion of the zone in which the tag is located.
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Citations
20 Claims
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1. A method, comprising:
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scanning a zone in an active mode at a first power level for identifying presence of a tag, the tag using at least some battery power to respond to the scanning in the active mode; and scanning portions of the zone in a passive mode at a second power level for again identifying presence of the tag, the tag not using battery power to respond to the scanning in the passive mode. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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2. A method comprising:
- scanning a zone in an active mode at a first power level for identifying presence of a tag;
scanning portions of the zone in a passive mode at a second power level for again identifying presence of the tag; and
scanning sub-zones of the zone in an active mode at a third power level, the third power level being lower than the first power level.
- scanning a zone in an active mode at a first power level for identifying presence of a tag;
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3. A method comprising:
- scanning a zone in an active mode at a first power level for identifying presence of a tag;
scanning portions of the zone in a passive mode at a second power level for again identifying presence of the tag; and
scanning sub-portions of the zone in a passive mode at a fourth power level, the fourth power level being lower than the second power level.
- scanning a zone in an active mode at a first power level for identifying presence of a tag;
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11. A Radio Frequency Identification (RFID) system, comprising:
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a plurality of RFID tags; and an RFID interrogator in communication with the RFID tags, the RFID interrogator performing at least a portion of the scanning of method 1.
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12. A system, comprising:
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an interrogator for scanning a zone in an active mode at a first power level for identifying presence of a tag, wherein the scanning includes activation of the tag from a hibernate state and singulation of the tag; wherein the interrogator also scans portions of the zone for again identifying presence of the tag. - View Dependent Claims (15, 16, 17, 18, 19)
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13. A system comprising:
- an interrogator for scanning a zone in an active mode at a first power level for identifying presence of a tag, wherein the interrogator also scans portions of the zone for again identifying presence of the tag, the interrogator scanning sub-zones of the zone in an active mode at a third power level, the third power level being lower than the first power level.
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14. A system comprising:
- an interrogator for scanning a zone in an active mode at a first power level for identifying presence of a tag, wherein the interrogator also scans portions of the zone for again identifying presence of the tag, the interrogator scanning sub-portions of the zone in a passive mode at a fourth power level, the fourth power level being lower than the first power level.
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20. A method, comprising:
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scanning an area at full transmitting power in an active mode for determining presence of a tag, the tag using at least some battery power to respond to the scanning in the active mode, wherein the scanning includes activation of the tag from a hibernate state; scanning zones of the area in the active mode at a power level less than full transmitting power for identifying the zone in which the tag is located; and scanning portions of the zone in which the tag is located in a passive mode for identifying the portion of the zone in which the tag is located.
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Specification