Navigation apparatus and route re-search method thereof
First Claim
1. A navigation apparatus, comprising:
- a GPS unit that calculates a current position of the apparatus based on received GPS signals;
a data storage unit that stores map information; and
a controller that can calculate a new route based on an estimated starting location and a destination location using the map information, wherein the controller estimates a calculation time required to calculate a new route, wherein the controller estimates where the apparatus will be located after the estimated calculation time expires, and wherein the controller sets the estimated location as the starting location when calculating the new route.
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Abstract
The present invention relates to a route re-search method of a navigation apparatus, and more particularly, to a route re-search method, wherein when a route is re-searched for, the location at the completion time of the re-search is estimated and a route is re-searched for from the estimated location. A navigation apparatus according to the present invention comprises a GPS receiving unit 10 for receiving GPS satellite signals and calculating current location; a data storage unit 40 for storing map information and information on route search time versus distance; and a main controller 50 for re-searching for a route using the route search time versus distance. At this time, if re-search for a route is requested, the main controller 50 searches for re-search time corresponding to re-search distance from the search information storage portion, estimates location after the re-search time based on current moving velocity, and re-searches for a route that starts from the location. According to the present invention, when re-searching for a route, the navigation apparatus re-searches for a route that starts from a point where re-searching the route is completed, whereby it is advantageous that a correct route can be re-set although the navigation apparatus moves while the route is re-searched for.
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Citations
23 Claims
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1. A navigation apparatus, comprising:
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a GPS unit that calculates a current position of the apparatus based on received GPS signals;
a data storage unit that stores map information; and
a controller that can calculate a new route based on an estimated starting location and a destination location using the map information, wherein the controller estimates a calculation time required to calculate a new route, wherein the controller estimates where the apparatus will be located after the estimated calculation time expires, and wherein the controller sets the estimated location as the starting location when calculating the new route. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A navigation apparatus, comprising:
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means for calculating a current position of the apparatus based on received GPS signals;
means for estimating a calculation time required to calculate a new route to the destination location;
means for estimating where the apparatus will be located when the estimated calculation time expires; and
means for calculating a new route between the estimated location of the apparatus and the destination location.
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8. A method of calculating a new route to a destination location in a navigation apparatus, comprising:
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calculating a current position of the apparatus based on received GPS signals;
estimating a calculation time required to calculate a new route to the destination location;
estimating where the apparatus will be located when the estimated calculation time expires; and
calculating a new route between the estimated location of the apparatus and the destination location. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A navigation apparatus, comprising:
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a GPS unit that calculates a current position of the apparatus based on received GPS signals;
a data storage unit that stores map information;
a buffer memory that holds an alternate route to a destination location; and
a controller that communicates with a user to inform the user about a route that should be followed to the destination location, wherein the controller determines if the apparatus has deviated from a first route to a location on the alternate route, and wherein the controller automatically switches from the first route to the alternate route in the buffer memory when it determines that the apparatus has deviated from the first route to a location on the alternate route. - View Dependent Claims (15, 16, 17, 18)
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19. A navigation apparatus, comprising:
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means for calculating an alternate route to a destination location while following a first route;
means for storing the alternate route in a buffer memory;
means for determining if the apparatus has deviated from the first route to a location along the alternate route; and
means for automatically switching to the alternate route in the buffer memory if the result of the determining step indicates that the apparatus is at a location along the alternate route.
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20. A method of providing route information in a navigation apparatus, comprising:
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calculating an alternate route to a destination location while following a first route;
storing the alternate route in a buffer memory;
determining if the apparatus has deviated from the first route to a location along the alternate route; and
automatically switching to the alternate route in the buffer memory if the result of the determining step indicates that the apparatus is at a location along the alternate route. - View Dependent Claims (21, 22, 23)
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Specification