Map matching method and apparatus for navigation system

Details Map matching method and apparatus for navigation system Map matching method and apparatus for navigation system

2006-10-16

2009-10-13

Hellner, Mark (Department: 3663)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C342S357490

Reexamination Certificate

active

07603233

ABSTRACT:
A map matching method and apparatus for a navigation system estimates a location of the navigation system on a correct road segment when a GPS signal is invalid. The map matching method creates a database of pairs of locations at which the navigation system encountered GPS signal loss and recovery in the first time. The navigation system conducts a map matching processing when the GPS signal is lost in the second time at the recorded location by incorporating various additional factors to match the current position with a correct road segment. The various additional factors, in addition to the measured data by a dead reckoning process, include road class, road accessibility, road angle, proximity to candidate road, etc.

REFERENCES:
patent: 5374933 (1994-12-01), Kao
patent: 6658353 (2003-12-01), Shimizu et al.
patent: 6931322 (2005-08-01), Jung et al.
patent: 09-152344 (1997-06-01), None
patent: 09-292249 (1997-11-01), None

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