Method of Determining Routes for Use in Navigation
First Claim
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1. A method of providing navigation information for a motor vehicle, comprising the steps of:
- retrieving a current route that is being used to navigate the motor vehicle to a destination;
receiving a current location for the motor vehicle;
calculating an alternative route from the current location to the destination, wherein a first travel time between the current location and the destination along the alternative route is estimated to be less than a second travel time between the current location and the destination along the current route;
determining a first distance corresponding to the alternative route and a second distance corresponding to the distance left to travel on the current route; and
using the first distance, the second distance, the first travel time and the second travel time to determine if the alternative route should be displayed for the user.
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Abstract
A method of determining routes for use in navigation is disclosed. The method includes steps of calculating a current route, calculating an alternative route and comparing the difference in times along each route with a minimum time difference. The minimum time difference is calculated using a dynamic threshold value that varies according to the difference in distances along the current route and the alternative route.
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Citations
20 Claims
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1. A method of providing navigation information for a motor vehicle, comprising the steps of:
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retrieving a current route that is being used to navigate the motor vehicle to a destination; receiving a current location for the motor vehicle; calculating an alternative route from the current location to the destination, wherein a first travel time between the current location and the destination along the alternative route is estimated to be less than a second travel time between the current location and the destination along the current route; determining a first distance corresponding to the alternative route and a second distance corresponding to the distance left to travel on the current route; and using the first distance, the second distance, the first travel time and the second travel time to determine if the alternative route should be displayed for the user. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of providing navigation information for a motor vehicle, comprising the steps of:
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retrieving a current route that is being used to navigate the motor vehicle to a destination; receiving a current location for the motor vehicle; calculating an alternative route from the current location to the destination, wherein a first travel time between the current location and the destination along the alternative route is estimated to be less than a second travel time between the current location and the destination along the current route; determining a first distance corresponding to the alternative route and a second distance corresponding to the distance left to travel on the current route; calculating a minimum time difference; submitting the alternative route to be displayed for a user when the value of the second travel time minus the first travel time is greater than the minimum time difference; preventing the alternative route from being displayed for the user when the value of the second travel time minus the first travel time is less than or equal to the minimum time difference; and wherein the minimum time difference varies as the difference between the first distance and the second distance varies. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method of providing navigation information for a motor vehicle, comprising the steps of:
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retrieving a current route that is being used to navigate the motor vehicle to a destination; receiving a current location for the motor vehicle; calculating an alternative route from the current location to the destination, wherein a first travel time between the current location and the destination along the alternative route is estimated to be less than a second travel time between the current location and the destination along the current route; determining a first distance corresponding to the alternative route and a second distance corresponding to the distance left to travel on the current route; calculating a dynamic threshold value, the dynamic threshold value being variable; setting a minimum time difference equal to the dynamic threshold value multiplied by the second travel time; and comparing the value of the second travel time minus the first travel time with the minimum time difference to determine if the alternative route should be displayed for a user. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification