Method and apparatus for establishing optimum route to intersection destination for navigation system
First Claim
1. A method of calculating a route to a destination for a navigation system, comprising the steps of:
- creating data indicating a virtual zero-length dummy link and storing the data in a memory of the navigation system;
retrieving the data indicating the virtual zero-length dummy link when a specified destination is an intersection (intersection destination);
connecting one end of the virtual zero-length dummy link to the intersection destination and setting another end of said virtual zero-length dummy link as a temporary destination;
calculating possible routes between the temporary destination and a current position of a user; and
selecting a most preferable route to the temporary destination for a route guidance operation to the intersection destination.
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Abstract
A method and apparatus for a navigation system for calculating a route to an intersection destination establishes an optimum route to the intersection. The method and apparatus creates a virtual zero-length dummy link, connects one end of the virtual zero-length dummy link to all link-spot pairs indicating an original intersection destination, sets another end of the virtual zero-length dummy link as a temporary destination, calculates possible routes between the temporary destination and a current vehicle position and selects the optimum route. After determining the optimum route, the navigation system removes the virtual zero-length dummy link and starts the route guidance operation to the intersection destination.
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Citations
20 Claims
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1. A method of calculating a route to a destination for a navigation system, comprising the steps of:
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creating data indicating a virtual zero-length dummy link and storing the data in a memory of the navigation system; retrieving the data indicating the virtual zero-length dummy link when a specified destination is an intersection (intersection destination); connecting one end of the virtual zero-length dummy link to the intersection destination and setting another end of said virtual zero-length dummy link as a temporary destination; calculating possible routes between the temporary destination and a current position of a user; and selecting a most preferable route to the temporary destination for a route guidance operation to the intersection destination. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus of calculating a route to a destination for a navigation system, comprising:
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means for creating data indicating a virtual zero-length dummy link and storing the data in a memory of the navigation system; means for retrieving the data indicating the virtual zero-length dummy link when a specified destination is an intersection (intersection destination); means for connecting one end of the virtual zero-length dummy link to the intersection destination and setting another end of said virtual zero-length dummy link as a temporary destination; means for calculating possible routes between the temporary destination and a current position of a user; and means for selecting a most preferable route to the temporary destination for a route guidance operation to the intersection destination. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification