Two directional information flow in real time location sensing RFID networks
First Claim
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1. A system including a plurality of base stations and a plurality of tags, where most of the time said tags are in a powered-down mode, which consumes significantly less power than said tags are in a powered-up mode, and said tags are repetitively powered up to transmit a signal that is received by one of more of said base stations, characterized by:
- a selected one of said base stations transmitting information to a specific tag of said tags, during a time when said specific tag is powered up.
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Abstract
An RFID system with a plurality of tags and base stations where transmission of information to a specific tag is carried out by one of the base stations, where said one of the base stations is selected based on location of the tag relative to the plurality of the base stations; illustratively, by the base stations that is closest to the tag.
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23 Claims
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1. A system including a plurality of base stations and a plurality of tags, where most of the time said tags are in a powered-down mode, which consumes significantly less power than said tags are in a powered-up mode, and said tags are repetitively powered up to transmit a signal that is received by one of more of said base stations, characterized by:
a selected one of said base stations transmitting information to a specific tag of said tags, during a time when said specific tag is powered up. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
Specification