Positioning system, method, and device for obtaining information about a current position
US6289279A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Nov 19, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.