In-vehicle navigation apparatus
First Claim
1. A navigation apparatus in a vehicle, comprising:
- a position detector for detecting a current position of the vehicle;
an advancing direction detecting unit for detecting an advancing direction of the vehicle;
a road data storage unit for storing road data, where a road includes at least one link, each link assigned information indicating a position of the each link, wherein a link corresponding to a one-way traffic road is assigned one-way traffic information including a trafficable direction;
a map matching unit for extracting a link within an area surrounding the detected current position from the road data storage unit to designate a travel road that the vehicle travels from a map-matching candidate road that includes the extracted link, wherein a certain road including the extracted link is excluded from the map-matching candidate road when the extracted link included in the certain road is assigned one-way traffic information indicating a trafficable direction not agreeing with the detected advancing direction; and
a registering unit for executing registration to register a one-way traffic road temporarily used in a direction opposite to a trafficable direction, wherein the map matching unit regards a link included in the registered one-way traffic road as a link assigned no one-way traffic information.
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Accused Products
Abstract
When a first one-way traffic road becomes partially impassable because of roadworks, a second one-way traffic road temporarily replaces the first road and is used in a direction opposite to an original trafficable direction. This second road is registered as a replacing road based on traffic information from the VICS center. When the second road registered as the replacing road is present within a given area surrounding the current position of a relevant vehicle, map matching is executed without considering the original trafficable direction of the second road. This allows the second road to be designated as a travel road through the map matching even when the relevant vehicle travels in a direction opposite to the original trafficable direction of the second road.
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Citations
5 Claims
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1. A navigation apparatus in a vehicle, comprising:
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a position detector for detecting a current position of the vehicle;
an advancing direction detecting unit for detecting an advancing direction of the vehicle;
a road data storage unit for storing road data, where a road includes at least one link, each link assigned information indicating a position of the each link, wherein a link corresponding to a one-way traffic road is assigned one-way traffic information including a trafficable direction;
a map matching unit for extracting a link within an area surrounding the detected current position from the road data storage unit to designate a travel road that the vehicle travels from a map-matching candidate road that includes the extracted link, wherein a certain road including the extracted link is excluded from the map-matching candidate road when the extracted link included in the certain road is assigned one-way traffic information indicating a trafficable direction not agreeing with the detected advancing direction; and
a registering unit for executing registration to register a one-way traffic road temporarily used in a direction opposite to a trafficable direction, wherein the map matching unit regards a link included in the registered one-way traffic road as a link assigned no one-way traffic information. - View Dependent Claims (2, 3, 4, 5)
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Specification