Power saving during sensor-assisted navigation

摘要

Methods and apparatuses for power saving during sensor-assisted Global Positioning System (GPS) navigation using a mobile device are presented. The methods may include receiving location improvement data for a geographic location, the location improvement data including a value corresponding to improvement in accuracy for location data for the geographic location. The mobile device may utilize the location improvement data to determine whether to utilize inertial sensors in the mobile device to improve the accuracy of the position fix.

主权项

1. A method of operating a mobile device, the method comprising:
receiving location improvement data for a geographic location, the location improvement data including a value corresponding to improvement in accuracy for location data for the geographic location, wherein the value is determined by:
computing a first error range of first location data for the geographic location generated using a Global Positioning System (GPS) receiver in combination with sensor data;computing a second error range of second location data for the geographic location generated using only the GPS receiver; andcomputing a margin of improvement between the first error range and the second error range; determining that the value is equal to or greater than a sensor enablement threshold criterion for the geographic location; and enabling one or more sensors for use in location determination when at or near the geographic location.