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RFID tag having multiple transceivers
| Details |
Inventors: Becker, Robert C.; Meyers, David W.; Kazi, Sabera;
Assignee: Honeywell International Inc. (Morristown, NJ)
Primary Examiner: Lee; Michael G.
Assistant Examiner: Nguyen; Kimberly
Attorney, Agent or Firm: Schiff Hardin LLP
Information is communicated between an RFID tag and first and second readers. A first transceiver of the RFID tag is controlled so that the first transceiver communicates with the first reader and so that the first transceiver has substantially longer periods during which the first transceiver is not in communication with the first reader than when the first transceiver is in communication with the first reader. A second transceiver of the RFID tag is controlled so that the second transceiver communicates with the second reader at least during the periods when the first transceiver is not in communication with the first reader. The RFID tag may also have a battery, a switch coupling the battery to at least the first transceiver, and a controller that operates the switch in a duty cycle such that power is provided by the battery to the first transceiver during ON times of the duty cycle and such that power from the battery to the first transceiver is interrupted during OFF times of the duty cycle. |
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DETAILED DESCRIPTION In accordance with one aspect of the present invention, a method of communicating information between an RFID tag and first and second readers comprises the following: controlling a first transceiver of the RFID tag so that the first transceiver communicates with the first reader and so that the first transceiver has substantially longer periods during which the first transceiver is not in communication with the first reader than when the first transceiver is in communication with the first reader; and, controlling a second transceiver of the RFID tag so that the second transceiver communicates with the second reader at least during the periods when the first transceiver is not in communication with the first reader.
In accordance with another aspect of the present invention, an RFID tag comprises first and second transceivers.
The first transceiver transmits and receives first signals to and from a first reader.
The second transceiver transmits and receives second signals to and from a second reader.
In accordance with still another aspect of the present invention, a method is providing to conserve battery power in an RFID tag having a battery, a receiver, and a transmitter.
The method comprises the following: duty cycling the receiver so that the receiver is turned on during ON times of duty cycles and so that the receiver is turned off during OFF times of the duty cycles; during the ON times of the receiver, receiving a frequency from a tag reader; and, transmitting data to the reader at the frequency.
In accordance with yet another aspect of the present invention, an RFID tag comprises a transmitter, a receiver, a battery, a switch, and a controller.
The transmitter transmits first data to a tag reader.
The receiver receives second data from the tag reader.
The switch couples the battery to the receiver.
The controller operates the switch in a duty cycle such that power is provided by the battery to the receiver during ON times of the duty cycle and such that power from the battery to the receiver is interrupted during OFF times of the duty cycle
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Telecommunications 
