Mobile unit navigation system and mobile unit navigation method
First Claim
1. A mobile unit navigation system comprising:
- a position detector for detecting the current position of a mobile unit;
a map information acquisition unit for acquiring map information from a storage medium or an external system;
an input unit for specifying a destination;
a route search unit for searching for a guide route from the current position to the destination based on the map information; and
an output unit for displaying the found guide route as an image or guiding a user along the found guide route with voice;
wherein said route search unit comprises a move route extraction unit for extracting a move route of the mobile unit based on a move path of the mobile unit provided by said position detection unit and the map information, a differential route registration unit for extracting a differential route different from the guide route from the extracted move route and registering the differential route, and a differential route application unit for applying the registered differential route to searching for the guide route.
1 Assignment
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Accused Products
Abstract
A mobile unit navigation system has a position detection unit 10 for a mobile unit, a map information acquisition unit 20, a destination input unit 30, a route search unit 40 for searching for a guide route from the current position to the destination, and an output unit 50 for displaying the found guide route as an image or guiding a user along the found guide route with voice. The unit 40 has a move route extraction unit for extracting a move route of the mobile unit based on a move path of the mobile unit provided by the detection unit 10 and the map information, a differential route registration unit for extracting a differential route different from the guide route from the extracted move route and registering the differential route, and a differential route application unit for applying the registered differential route to searching for the guide route.
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Citations
19 Claims
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1. A mobile unit navigation system comprising:
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a position detector for detecting the current position of a mobile unit;
a map information acquisition unit for acquiring map information from a storage medium or an external system;
an input unit for specifying a destination;
a route search unit for searching for a guide route from the current position to the destination based on the map information; and
an output unit for displaying the found guide route as an image or guiding a user along the found guide route with voice;
wherein said route search unit comprises a move route extraction unit for extracting a move route of the mobile unit based on a move path of the mobile unit provided by said position detection unit and the map information, a differential route registration unit for extracting a differential route different from the guide route from the extracted move route and registering the differential route, and a differential route application unit for applying the registered differential route to searching for the guide route. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A mobile unit navigation method comprising the steps of:
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detecting the current position of a mobile unit;
acquiring map information from a storage medium or an external system;
specifying a destination;
searching for a guide route from the current position to the destination based on the map information; and
displaying the found guide route or guiding a user along the found guide route with voice;
wherein said route search step comprises the steps of;
extracting a move route of the mobile unit based on a move path of the mobile unit provided by said position detection step and the map information;
extracting a differential route different from the guide route from the extracted move route and registering the differential route; and
applying the registered differential route to searching for the guide route.
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Specification