Patent · US Expired

Position measuring method and mobile communication terminal

US7590424B2 · kind B2 · utility

9Cited by

10References

25Claims

0Family size

Assignee

NTT DOCOMO, INC. · JP

Inventors

Hiroyuki Yamamoto · Kokubunji, JP
Katsutoshi Murata · Kunitachi, JP

Key dates

Filing date	Mar 26, 2002
Grant date	Sep 15, 2009
Priority date	—
Expiry date	Oct 6, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG01S19/06
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Each time mobile communication terminal 10 moves a distance of 150 kilometers, it computes its approximate position by performing a stand-alone position measurement, and stores the approximate position. When mobile communication terminal 10 needs to precisely measure its location it notifies position measurement assist server 30 of the stored approximate position, to thereby perform a GPS position measurement operation by using satellite capturing data transmitted, accordingly, from position measurement assist server 30.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.