Method and Apparatus for Power Management for a Radio Frequency Identification System
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Abstract
A method and device of power management for a networked radio frequency identification (“RFID”) system are disclosed. The described power management methods reduce the power consumption of battery-operated RFID readers and RFID tags. These power conservation methods increase the RFID system'"'"'s hours of operation and decrease the cost by allowing the RFID readers and tags to function for a longer period of time before requiring charging or replacement of their batteries.
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Citations
31 Claims
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1-14. -14. (canceled)
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15. A method for transmitting information relating to radio frequency identification (“
- RFID”
) in an RFID reader, comprising;obtaining location information from a global positioning system (“
GPS”
);calculating a current location of said RFID reader according to said location information; retrieving a plurality of active RF reading zones relating to said current location of said RFID reader from a storage location of said RFID reader; determining whether said current location of said RFID reader is within said at least one zone of said plurality of active RF reading zones; and switching at least a portion of components of said RFID reader into a sleep state to conserve power if said current location of said RFID reader is outside of any of said plurality of active RF reading zones. - View Dependent Claims (16, 17, 18)
- RFID”
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19-27. -27. (canceled)
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28. A method for transmitting information relating to radio frequency identification (“
- RFID”
) in an RFID system, comprising;identifying a first tag to be read; transmitting a first transmission power to read said first tag; transmitting a second transmission power which is higher frequency than said first transmission power to read said first tag if said first transmission power fails to read said first tag; and storing said second transmission power together with an identification of said first tag in a memory unit of an RFID reader for subsequent reads if said second transmission power reads said first tag correctly. - View Dependent Claims (29, 30)
- RFID”
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31-46. -46. (canceled)
Specification