System and method for 3-D position determination using RFID
First Claim
Patent Images
1. An RFID tag, comprising:
- an RF transceiver;
a memory including information indicative of a geographic location of the RFID tag and information indicative of a confidence level associated with the location of the RFID tag, the memory in communication with the RF transceiver; and
an antenna in communication with the RF transceiver configured to receive signals from and send signals to an RFID reader;
wherein the RFID tag is configured to obtain at least some of the information indicative of the location of the RFID tag as a result of interacting with other devices and to exchange confidence level information with a second RFID tag, wherein a processor in the RFID tag updates is configured to update the location information if it has a confidence level less than that of the second RFID tag.
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Abstract
Determining the location of wireless devices is improved by storing location information in RFID devices. As RFID devices come within range of each other they examine a confidence level associated with each others location information. The RFID device may update their location information based upon location information received from other RFID devices that have a higher confidence level.
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Citations
17 Claims
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1. An RFID tag, comprising:
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an RF transceiver; a memory including information indicative of a geographic location of the RFID tag and information indicative of a confidence level associated with the location of the RFID tag, the memory in communication with the RF transceiver; and an antenna in communication with the RF transceiver configured to receive signals from and send signals to an RFID reader; wherein the RFID tag is configured to obtain at least some of the information indicative of the location of the RFID tag as a result of interacting with other devices and to exchange confidence level information with a second RFID tag, wherein a processor in the RFID tag updates is configured to update the location information if it has a confidence level less than that of the second RFID tag. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A mobile device comprising:
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an RFID reader; an RFID tag comprising an RF transceiver, a memory including information indicative of a location of the mobile device, and an antenna configured to receive and send signals to an RFID reader; and a processor configured to update the information indicative of the location of the mobile device based upon a confidence level; and means for transmitting information indicative of the location of the mobile device to a second mobile device. - View Dependent Claims (8, 9)
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10. A method of determining location of an RFID tag, the method comprising:
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interrogating an external device wherein the external device comprises a second RFID tag; determining a confidence level of location information stored within the external device, and updating location information of the RFID tag based on location information of the external device if the confidence level of the external device location information is greater than a confidence level of the RFID tag location information. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An RFID tag comprising:
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means for interrogating an external device wherein the external device comprises a second RFID tag; means for determining a confidence level of location information stored within the external device, and means for updating location information of the RFID tag based on location information of the external device if the confidence level of the external device location information is greater than a confidence level of the RFID tag location information. - View Dependent Claims (17)
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Specification