Patent · US Active

Energy efficient location tracking on smart phones

US8588810B2 · kind B2 · utility

9Cited by

8References

2Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Jing Dai · White Plains, US
Ming Li · Cupertino, US
Milind R. Naphade · Cupertino, US
Sambit Sahu · Hawthorne, US

Key dates

Filing date	Nov 30, 2011
Grant date	Nov 19, 2013
Priority date	—
Expiry date	Nov 30, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02D30/70
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A GPS-enabled cellular electronic device is operated in an indoor mode. An increase in strength of a cellular signal is detected at the GPS-enabled cellular electronic device. Responsive at least to the increase in cellular signal strength, the GPS-enabled cellular electronic device is transitioned to an outdoor testing mode. Detecting is carried out to determine whether movement of the GPS-enabled cellular electronic device occurs during the outdoor testing mode. If so, the GPS-enabled cellular electronic device is transitioned to an outdoor mode.

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