Positioning system using invisible light, sound and radio frequency signals
OwnerDong-Kwon Liminventor
Life of this patent
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Abstract
Disclosed is a positioning system and a node network. A terminal included in the present invention is characterized by an invisible light sensing unit that detects invisible light signals, that were emitted from one or more signaling nodes with the same intensity, carrying the location data of each signaling node; and a controller that calculates the user's position based on the location data included in one or more invisible light signals and their received signal strength.
Claims6
A positioning system that determines its position based on invisible light, sound, and radio frequency signals each with the same intensity through different channels from one or more signaling nodes in an indoor space, comprising:
- a signal transmitter that sends a signal to request location information to one or more signaling nodes, wherein the one or more signaling nodes emits an invisible light signal of the same intensity;
- and
- an invisible light sensor that detects invisible light rays from one or more signaling nodes, which emit signals with the same intensity, carrying location data of each signaling node upon receiving a request to transmit a location data signal;
- a position calculation unit that calculates a terminal's position based on at least one received signal strength from the one or more signaling nodes above;
- a sound receiver that receives at least one sound signal transmitted from one or more signaling nodes, each transmitting a signal with the same intensity on different channels, where the position calculation unit calculates the user's location from one or more sound signals, when the above invisible light signal was not detected;
- and
- a radio frequency receiver that receives at least one radio frequency signal transmitted from one or more signaling nodes that received the location request signal, each transmitting a signal with the same intensity on different channels, where the position calculation unit calculates the user's location from one or more radio frequency signals, when the invisible light and the sound signals were not detected;
- wherein the order of priority for the position calculation is light signal, sound wave, and RF signal;
- wherein the invisible light rays is selected from the group consisting of:
- infrared or ultraviolet light;
- and
- wherein the position calculation unit obtains a user's position based on the ratios of degree of decrease in signal strength of the invisible light signals with the same signal intensity which is proportional to the distance.
A positioning system;
- and
- a node network that includes one or more signaling nodes that transmit invisible light, sound, and radio frequency signals that carry data comprising unique ID, longitude, latitude, altitude, channel, time of transmission, ID of the device that made a transmission request to be received by the terminal;
- and
- a signal transmission unit sends a signal to request location information to one or more signaling nodes;
- and
- an invisible light detection unit that detects one or more invisible light signals emitted with the same intensity on different channels from one or more signaling nodes that have received the location request signal;
- and
- a position calculation unit that calculates the user's position based on one or more invisible light signals of the node network in the order of light signal, sound wave, and RF signal.
Dependencies are inferred from the claim text.