Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2007-04-30
2010-06-08
Kincaid, Lester (Department: 2617)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C455S456100, C455S456200, C455S456300, C455S456400, C455S456500, C455S456600
Reexamination Certificate
active
07733836
ABSTRACT:
In one embodiment, a method of estimating location of a mobile beaconing device within a building includes steps: concurrently transmitting from the beaconing device at least first and second signals, which respectively indicates at least first and second transmit power levels thereof; receiving the at least first and second signals by a plurality of anchor devices at different known locations; estimating first distances between the beaconing device and each anchor device as a function of signal power levels of the first signal received by each anchor device, and second distances between the beaconing device and each anchor device as a function of signal power levels of the second signal received by each anchor devices; and calculating an estimated location of the beaconing device as a function of the estimated first distances and second distances.
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Kincaid Lester
Mitchell Nathan
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