SYSTEM AND METHOD FOR INDOOR POSITIONING USING LED LIGHTING
First Claim
1. A Light Emitting Diode (LED) lighting unit for performing indoor positioning, the LED lighting unit comprising:
- a frame generating unit for generating at least one field constituting a frame and storing information of the LED lighting unit and transmission packet data in the at least one field;
a scrambler for modulating the transmission packet data in accordance with a predetermined method in order to maintain a uniform brightness of the LED lighting unit; and
a positioning transmitter for transmitting the frame to at least one mobile terminal positioned within a light emitting range of the LED lighting unit, via visible light communication.
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Accused Products
Abstract
A system for performing indoor positioning using a Light Emitting Diode (LED) lighting unit is provided. The system includes the LED lighting unit for determining whether transmission packet data exists in a frame to be transmitted, modulating the transmission packet data in accordance with a predetermined method in order to maintain a uniform brightness of the LED lighting unit when the transmission packet data exists, and transmitting the frame including the modulated transmission packet data. The system also includes a mobile terminal for receiving the frame, demodulating the modulated transmission packet data to determine the transmission packet data, and performing indoor positioning by using the demodulated transmission packet data and information included in the frame.
132 Citations
16 Claims
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1. A Light Emitting Diode (LED) lighting unit for performing indoor positioning, the LED lighting unit comprising:
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a frame generating unit for generating at least one field constituting a frame and storing information of the LED lighting unit and transmission packet data in the at least one field; a scrambler for modulating the transmission packet data in accordance with a predetermined method in order to maintain a uniform brightness of the LED lighting unit; and a positioning transmitter for transmitting the frame to at least one mobile terminal positioned within a light emitting range of the LED lighting unit, via visible light communication. - View Dependent Claims (2, 3, 4)
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5. A mobile terminal for performing indoor positioning using a Light Emitting Diode (LED) lighting unit, the mobile terminal comprising:
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a positioning receiver for receiving a frame comprising the LED lighting unit'"'"'s information and modulated transmission packet data, from the LED lighting unit via visible light communication; a descrambler for demodulating the modulated transmission packet data in accordance with a predetermined method in order to determine the modulated transmission packet data; and a frame extracting unit for extracting the information included in the received frame. - View Dependent Claims (6, 7)
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8. A method for transmitting indoor positioning information by using a Light Emitting Diode (LED) lighting unit, the method comprising the steps of:
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determining whether transmission packet data exists in a frame to be transmitted to at least one mobile terminal positioned within a light emitting range of the LED lighting unit, by the LED lighting unit; modulating the transmission packet data in accordance with a predetermined method in order to maintain a uniform brightness of the LED lighting unit when the transmission packet data exists; and transmitting the frame comprising the modulated transmission packet data to the at least one mobile terminal. - View Dependent Claims (9, 10, 11, 12)
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13. A method for receiving indoor positioning information by using a mobile terminal, the method comprising the steps of:
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receiving a frame comprising information of a Light Emitting Diode (LED) lighting unit and modulated transmission packet data, via visible light communication from the LED lighting unit, by the mobile terminal; demodulating the modulated transmission packet data included in the frame received from the LED lighting unit, in accordance with a predetermined method in order to determine the modulated transmission packet data; and performing indoor positioning by using the demodulated transmission packet data, and the information. - View Dependent Claims (14, 15)
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16. A system for performing indoor positioning using a Light Emitting Diode (LED) lighting unit, the system comprising:
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the LED lighting unit for determining whether transmission packet data exists in a frame to be transmitted, modulating the transmission packet data in order to maintain a uniform brightness of the LED lighting unit when the transmission packet data exists, and transmitting the frame comprising the modulated transmission packet data; and a mobile terminal for receiving the frame, demodulating the modulated transmission packet data to determine the transmission packet data, and performing indoor positioning by using the demodulated transmission packet data and information included in the frame.
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Specification