Navigation system and method using visible light communication
First Claim
1. An in-building navigation method using Visible Light Communication (VLC), comprising:
- controlling each of a plurality of lamp modules to generate a visible light signal as information for a navigation function by transmitters, wherein said visible light generated by each of said plurality of lamp modules is formed from a combination of plurality of LED outputs to be different wavelength from adjacent ones of said lamp modules;
receiving said visible light signals from each of said plurality of lamp modules that illuminate an area where a mobile terminal is located by the mobile terminal;
acquiring location information regarding a current location of the mobile terminal by the visible light signals received from the plurality of lamp modules; and
displaying navigation information including information that matches the location information to map information on the mobile terminal.
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Accused Products
Abstract
A system and method for providing an in-building navigation service using VLC are provided, in which transmitters control lamp modules to generate visible light signals each in a combination of different wavelengths as information for a navigation function, a mobile terminal receives visible light signals from a plurality of lamp modules that illuminate an area where the mobile terminal is located, location information about a current location of the mobile terminal is acquired through the visible light signals received from the plurality of lamp modules, and navigation information including information that matches the location information to map information is displayed on the mobile terminal.
242 Citations
44 Claims
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1. An in-building navigation method using Visible Light Communication (VLC), comprising:
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controlling each of a plurality of lamp modules to generate a visible light signal as information for a navigation function by transmitters, wherein said visible light generated by each of said plurality of lamp modules is formed from a combination of plurality of LED outputs to be different wavelength from adjacent ones of said lamp modules; receiving said visible light signals from each of said plurality of lamp modules that illuminate an area where a mobile terminal is located by the mobile terminal; acquiring location information regarding a current location of the mobile terminal by the visible light signals received from the plurality of lamp modules; and displaying navigation information including information that matches the location information to map information on the mobile terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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- 14. The in-building navigation method of 1, wherein each of the lamp modules emits a visible light signal by combining at least one red light, at least one green light, and at least one blue light.
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18. An in-building navigation system using Visible Light Communication (VLC), comprising:
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a navigation server for storing map information including map images to provide a navigation function and transmitting navigation information including location information and the map information; a plurality of lamp modules for generating visible light signals each in a combination of different wavelengths; a plurality of transmitters connected between the navigation server and the plurality of lamp modules, for transmitting signals and the navigation information received from the navigation server to the lamp modules in accordance with a VLC protocol; and a mobile terminal having a VLC receiver for; receiving and identifying the visible light signals from the lamp modules; and receiving and displaying the navigation information, wherein the navigation server acquires the location information based on distances between the mobile terminal and the plurality of lamp modules. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An in-building navigation system using Visible Light Communication (VLC), comprising:
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a navigation server for storing map information including map images to provide a navigation function; a plurality of lamp modules for generating visible light signals each in a combination of different wavelengths; a plurality of transmitters connected between the navigation server and the plurality of lamp modules, for transmitting VLC signals to the lamp modules; and a mobile terminal having a VLC receiver for receiving and identifying the visible light signals from the lamp modules, for acquiring location information based on times to receive the visible light signals from the lamp modules, generating navigation information including the location information and the map information received from the navigation server, and displaying the navigation information. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. A VLC system unit comprising;
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a PLC receiving unit; a plurality of at least one of a red LED, a blue LED and a green LED; a VLC transmitter unit, and a processor in communication with a memory, the memory including code which when accessed by the processor causes the processor to; receive control information through said PLC receiving unit; apply said control information to each of said plurality of at least one red LED, blue LED and green LED to generate a visible light of a known wavelength; and transmit via said VLC transmitter unit, on said generated visible light, at least one of;
identification information associated with said VCL communication unit and time information. - View Dependent Claims (38, 39, 40, 41, 42)
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43. A VLC system mobile terminal comprising:
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a transmitting unit; a VLC receiving unit for receiving a visible light transmission; a plurality of filters for filtering said visible light transmission, said filtering distinguishing visible light transmission received from a plurality of sources; and a processor in communication with a memory, said memory including code which when accessed by said processor causes said processor to; determining an identification of each of said distinguished visible light transmissions; determining a time of reception of each of said visible light transmissions; calculating a time taken to receive each of said visible light transmissions; and transmitting said calculated time taken via said transmitting unit. - View Dependent Claims (44)
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Specification