Object monitoring, locating, and tracking system and method employing RFID devices
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United States of America Patent
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Nov 23, 2010
Issued Date -
N/A
app pub date -
May 17, 2007
filing date -
Aug 26, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An RFID system and method utilizes the power level of messages received from an RFID device for monitoring and/or locating and/or tracking the RFID device, e.g., and typically an object associated with the RFID device. The power level of received messages may be indicated by power level information contained in the message, or by the strength of the received signal carrying the message, or by both. The RFID system and method may be employed to monitor a condition of an object, e.g., a closable container, as to whether it is and/or has been closed or not, including being tampered with. Messages received from the RFID device, as well as an indication of a condition, may be relayed to a remote location.
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