Navigation system

Details Navigation system Navigation system

2005-09-27

2005-09-27

Camby, Richard M. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C701S209000

Reexamination Certificate

active

06950745

ABSTRACT:
A navigation guidance system (1) is provided which provides direction information from a remote server (11) to a mobile user unit (2) for guiding user to a desired destination. The navigation guidance system (1) maintains time-related models for traffic speeds expected on road segments of a road database. By maintaining such time-related models, the system can more accurately provide the user with road guidance instructions to arrive at a chosen destination by a given time. The system can also provide more accurate route guidance information to a destination over different routes, even during rush hour or at off peak times. These time related models can be changed as a result of changing traffic patterns or as a result of an incident on a road segment. In a preferred embodiment, therefore, the system continuously monitors each calculated route and advises the users of alternative routes or of updated departure or arrival times as appropriate.

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Copending U.S. Appl. No. 10/239,501, filed Sep. 23, 2002.
Copending U.S. Appl. No. 10/345,941, filed Jan. 17, 2003.

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