System and method for determining positioning information via modulated light
First Claim
Patent Images
1. A method comprising:
- receiving, at a headset device associated with, and physically separate from a mobile station, a generated light signal from a light source location,wherein the light source location comprises a light-emitting diode (LED) and wherein the generated light signal comprises light modulated to produce an on-off keyed coded signal;
transmitting information relating to the received light signal by the headset device to the mobile station, andderiving, by a processor at the mobile station, spatial positioning information from the on-off keyed coded 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.
145 Citations
19 Claims
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1. A method comprising:
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receiving, at a headset device associated with, and physically separate from a mobile station, a generated light signal from a light source location, wherein the light source location comprises a light-emitting diode (LED) and wherein the generated light signal comprises light modulated to produce an on-off keyed coded signal; transmitting information relating to the received light signal by the headset device to the mobile station, and deriving, by a processor at the mobile station, spatial positioning information from the on-off keyed coded signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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a headset unit having a receiver configured to receive modulated light signals from at least one light source in proximity thereto; a mobile station wirelessly coupled to, and physically separate from the headset unit, the mobile station including a processor configured to derive spatial positioning information based on a received light signal; and a communication interface, wherein the processor is configured to generate an emergency alert notification containing the derived spatial positioning information and user profile information, and wherein the communication interface is configured to transmit the emergency alert notification to an emergency response system. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A system comprising:
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a light source configured to transmit a modulated light signal upon receipt of an indication of an emergency situation from an emergency response system; 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, wherein the mobile station comprises a transmitter configured to transmit an emergency alert notification that includes the spatial positioning information to the emergency response system remote from the mobile station. - View Dependent Claims (18, 19)
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Specification