Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment
Reexamination Certificate
2006-04-10
2008-12-02
Beaulieu, Yonel (Department: 3661)
Data processing: vehicles, navigation, and relative location
Navigation
Employing position determining equipment
C701S200000, C342S357490, C342S357490
Reexamination Certificate
active
07460955
ABSTRACT:
A method for synchronization of an external device's clock324with a GPS device104is provided. The method can comprise processing one or more data sentences received at the external device106from the GPS device to determine a data sentence containing the best available time information that is most accurate among the data sentences. Also, an amount of correction can be determined to compensate for one or more variable time delays introduced by one or more processes. The one or more processes can selected from a group consisting of a process performed by the GPS device t1b, a data sentence transmission from the GPS device to the external device t2b, and a data processing step performed by the external device t3b. A synchronization time using the amount of correction and the best available time information can be provided. The method can further comprise correcting a timing error introduced into time stamp values by the external device clock. This step can include removing an accumulate error by restarting the method after a pre-defined amount of time (e.g., one hour).
REFERENCES:
patent: 2006/0116820 (2006-06-01), Mori et al.
patent: 2007/0250266 (2007-10-01), Mori et al.
Beaulieu Yonel
Darby & Darby
Harris Corporation
Sacco Robert J.
LandOfFree
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