Method of downloading ephemeris data based on user activity

Details Method of downloading ephemeris data based on user activity Method of downloading ephemeris data based on user activity

G - Physics

01

S

G01S 5/14 (2006.01) H04W 4/02 (2009.01)

Patent

CA 2619282

Ephemeris data is downloaded intelligently to a GPS--enabled wireless communications device based on user activity rather than at fixed predetermined intervals. Ephemeris data can be downloaded to enable both Aided GPS and Assisted GPS. The device can download ephemeris data based on the frequency of requests into an API communicating with a GPS driver, based on the detection of a new network, or a change in time zone of the network time. Intelligent, adaptive downloading of ephemeris optimizes the usage of bandwidth and the data charge to the user while ensuring that ephemeris data is cached to provide assistance for location-based services such as turn-based navigation.

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