Systems and methods for determining geographic location of a mobile device

US9519065B2 · kind B2 · utility

Assignee

• AT&T Intellectual Property I, L.P. · US

Inventors

• Paul Shala Henry · Holmdel, US
• Christopher Rice · Alexandria, US

Key dates

• Filing date: May 23, 2012
• Grant date: Dec 13, 2016
• Expiry date: May 23, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S19/34
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for determining geolocation of a mobile device, and a system for performing the method. The mobile device includes a location component, a local positioning component, and a reference positioning component. The method includes determining a local-positioning period based on an identified factor, and obtaining a location fix for the device from the reference positioning component. The method further includes commencing the period and measuring movement using the location component. The method also includes determining a present location of the device, using the location component, based on the location fix and the movement data and, during the period, repeating the measuring and determining steps. The method further includes, after the period expires, updating the location fix with a new location fix from the reference positioning component, resetting the local-positioning period; and repeating the steps for determining location during the reset period using the new location fix.