SYSTEM AND METHOD FOR DETERMINING POSITIONING INFORMATION VIA MODULATED LIGHT
First Claim
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1. A method comprising:
- receiving a generated light signal from a light source location; and
deriving spatial positioning information from the generated light signal.
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Abstract
Light sources are affixed at appropriate positions in a multilevel structure or in an obstructed environment. The light sources generate modulated light signals, such as controlled light-emitting diodes, which identify the positions of the light sources by their three-dimensional global positioning coordinates and/or equivalent representation that specifies their in situ locations in the environment. Mobile communication devices, upon receiving the light signals, can derive spatial positioning information and transmit such information to a remote location, such as an emergency response system.
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Citations
20 Claims
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1. A method comprising:
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receiving a generated light signal from a light source location; and deriving spatial positioning information from the generated light signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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a receiving unit configured to receive modulated light signals from at least one light source in proximity thereto; and a processor coupled to the receiving unit, the processor configured to derive spatial positioning information based on a received light signal. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A system comprising:
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a light source configured to transmit a modulated light signal; and a mobile station comprising a receiving unit, configured to receive the modulated light signal, and a processor coupled thereto, the processor configured to derive spatial positioning information from the received modulated light signal. - View Dependent Claims (19, 20)
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Specification