Positioning system, method, and device for obtaining information about a current position
First Claim
1. A positioning system for obtaining information about a current position of a device, comprising:
- a radio-call base-station which sends data; and
a positioning device including a receiving means which receives data sent from said radio-call base-station, and a first positioning means which obtains position data indicating a current position of the device based on data sent from said radio-call base-station, a secondary positioning means to obtain secondary position data by measuring the current position of the device based on signals sent from artificial satellites, and a reception-frequency-switching means to switch a reception frequency based on said secondary position data, wherein said radio-call base-station is equipped with a position-correction-data-generating means to generate position-correction data to correct said secondary position data, and wherein said secondary positioning means includes a position-data-correction means to correct said secondary position data using said position data sent from said radio-call base-station.
3 Assignments
0 Petitions
Accused Products
Abstract
A positioning system for obtaining information concerning a current position of a device even when one is in an underground center or inside a building includes a portable terminal is equipped with a radio-call-reception part having a radio-call-reception function that is a receiving unit which receives data sent from the base station and a positioning function to obtain the primary position data indicating the current position of the device based on data sent from the base station, a GPS-reception part having a positioning function to obtain the secondary position data on measuring the current position of the device based on signals sent from GPS satellites, and a position-data-correction function to correct the secondary position data using the position-correction data sent from the base station, and an information-processing part having a function to perform information processing using position data obtained from the radio-call-reception part and the GPS-reception part.
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Citations
9 Claims
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1. A positioning system for obtaining information about a current position of a device, comprising:
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a radio-call base-station which sends data; and
a positioning device including a receiving means which receives data sent from said radio-call base-station, and a first positioning means which obtains position data indicating a current position of the device based on data sent from said radio-call base-station, a secondary positioning means to obtain secondary position data by measuring the current position of the device based on signals sent from artificial satellites, and a reception-frequency-switching means to switch a reception frequency based on said secondary position data, wherein said radio-call base-station is equipped with a position-correction-data-generating means to generate position-correction data to correct said secondary position data, and wherein said secondary positioning means includes a position-data-correction means to correct said secondary position data using said position data sent from said radio-call base-station. - View Dependent Claims (2, 3)
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4. A positioning method for obtaining information about a current position of a device, comprising the steps of:
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sending data from a radio-call base station;
receiving data sent from said radio-call base station at a positioning device;
obtaining position data indicating a current position of the device based on data sent from said radio-call base-station;
correcting the position data obtained by measuring the current position of the device based on signals sent from artificial satellites by using position-correction data generated at said radio-call base-station and sent from said radio-call base-station; and
causing the positioning device that receives data sent from said radio-call base-station to switch reception frequencies based on said position data. - View Dependent Claims (5, 6)
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7. A positioning device for obtaining information about a current position of the device comprising:
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a receiving means which receives data sent from a radio-call base-station, a first positioning means which obtains position data indicating the current position of the device based on data sent from said radio-call base-station;
a secondary positioning means to obtain secondary position data on measuring the current position of the device based on signals sent from artificial satellites;
a position-data-correction means to correct said secondary position data using said position-correction data sent from said radio-call base-station; and
a reception-frequency-switching means to switch reception-frequencies based on said secondary position data. - View Dependent Claims (8, 9)
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Specification