System and Method for Determining Location, Directionality, and Velocity of RFID Tags
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United States of America Patent
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N/A
Issued Date -
Sep 6, 2007
app pub date -
Mar 2, 2007
filing date -
Mar 2, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In certain embodiments, a method for tracking tags includes transmitting wake-up signals from a number of activation antennas located throughout an environment. Each wake-up signal includes an antenna ID of the antenna that transmitted the wake-up signal. A plurality of identification signals are received from a tag, each identification signal generated in response to receipt by the tag of a wake-up signal from a corresponding antenna and including a tag ID of the tag and the antenna ID included in the wake-up signal of the antenna that transmitted the wake-up signal. A directionality of the tag is determined based on the sequence in which the plurality of identification signals are received from the tag.
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