Present position estimation method, positioning method, program, and mobile terminal
US7864108B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2008 |
| Grant date | Jan 4, 2011 |
| Priority date | — |
| Expiry date | Dec 22, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/252
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A final located position when a GPS receiver section (positioning section) has finished positioning is determined to be the latest located position, and the combination of identification information (ID) of base stations (suspended base stations) with which a portable telephone wireless communication circuit section has performed wireless communication is stored in a flash ROM. The combination of base stations that currently perform wireless communication with the wireless communication section and the combination of the suspended base stations stored in the flash ROM are compared when the GPS receiver section again performs positioning. When it has been determined that the combinations coincide, the latest located position stored in the flash ROM is estimated to be the present position of a portable telephone. The estimated present position is used as the initial position during the first positioning when the GPS receiver section again performs positioning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.