Navigation apparatus for land vehicle inputting road traffic information
First Claim
1. A navigation apparatus for a land vehicle, comprising:
- first storage means storing road data being formed by a network of a plurality of road links;
second storage means storing traveling cost data corresponding to respective ones of said road links;
receiving means receiving traffic information corresponding to a specific link being set for communication of traffic information;
identification means identifying one said road link corresponding to said received traffic information from said stored plurality of road links;
update means updating said stored traveling cost data corresponding to said identified road link on the basis of said received traffic information;
search means searching for a route between an origin and a destination in accordance with said stored road data and said traveling cost data including said updated traveling cost data; and
table storage means storing a conversion table indicating a correspondence between said specific link and said road links;
whereinsaid identification means identifies said one road link in accordance with said conversion table,said update means updates said traveling cost data in accordance with said conversion table,said conversion table includes data relating to said specific link, and data relating to one said road link corresponding to said specific link,said data relating to said specific link includes information concerning a number of said specific link, information concerning a length of said specific link, and information concerning a number of said one road link corresponding to said specific link,said data relating to said one road link corresponding to said specific link includes information concerning a number of said one road link corresponding to said specific link, information concerning a distance between an ending point of said specific link and an ending point of said one road link corresponding to said specific link, and information concerning a length of a portion where said specific link overlaps with said one road link corresponding to said specific link.
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Accused Products
Abstract
A navigation apparatus stores road data which are formed by a network of internally stored road links and traveling costs corresponding to the respective ones of the internal road links. When the navigation apparatus receives traffic information corresponding to a specific external road link which is set for communication of traffic information, the apparatus identifies one or more internal links or portions thereof corresponding to the external link for which traffic information has been received, and the stored traveling costs are updated, on the basis of a conversion table. The traveling cost for an internal road link corresponding to a specific external link which is closed to traffic is updated to "∞". The apparatus searches for and identifies a route between an origin and a destination based on the updated traveling costs and the network of the road links. The internal links do not need to correspond directly to the external links, but rather may include more branch points for example. Traffic information of different types and for different links can be processed and assimilated for correspondence with the internal links.
71 Citations
19 Claims
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1. A navigation apparatus for a land vehicle, comprising:
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first storage means storing road data being formed by a network of a plurality of road links; second storage means storing traveling cost data corresponding to respective ones of said road links; receiving means receiving traffic information corresponding to a specific link being set for communication of traffic information; identification means identifying one said road link corresponding to said received traffic information from said stored plurality of road links; update means updating said stored traveling cost data corresponding to said identified road link on the basis of said received traffic information; search means searching for a route between an origin and a destination in accordance with said stored road data and said traveling cost data including said updated traveling cost data; and table storage means storing a conversion table indicating a correspondence between said specific link and said road links;
whereinsaid identification means identifies said one road link in accordance with said conversion table, said update means updates said traveling cost data in accordance with said conversion table, said conversion table includes data relating to said specific link, and data relating to one said road link corresponding to said specific link, said data relating to said specific link includes information concerning a number of said specific link, information concerning a length of said specific link, and information concerning a number of said one road link corresponding to said specific link, said data relating to said one road link corresponding to said specific link includes information concerning a number of said one road link corresponding to said specific link, information concerning a distance between an ending point of said specific link and an ending point of said one road link corresponding to said specific link, and information concerning a length of a portion where said specific link overlaps with said one road link corresponding to said specific link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of processing navigation information using a navigation apparatus having stored therein road data comprising a network of a plurality of internal road links, and traveling cost data associated with respective ones of said internal road links, for navigating a land vehicle traveling on a road network including a plurality of external road links and an external traffic information transmitter, comprising the following steps:
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(a) receiving from said transmitter traffic information corresponding to one of said external road links; (b) storing in a conversion table in said apparatus data relating to an identifying label of said external road link, data relating to a length of said external road link, data relating to at least one respective identifying label of at least one corresponding one of said internal road links that at least partially corresponds with said external road link, and, for each of said at least one corresponding internal road link, data relating to a respective distance between an endpoint of said external road link and an endpoint of said at least one corresponding internal road link and data relating to a respective length of an overlap between said external road link and said at least one corresponding internal road link; (c) identifying said at least one corresponding internal road link that at least partially corresponds with said external road link, in accordance with said data stored in said conversion table; (d) updating said traveling cost data respectively associated with said at least one identified internal road link, in accordance with said data stored in said conversion table; and (e) searching for a travel route between an origin and a destination in accordance with said stored road data and said updated traveling cost data. - View Dependent Claims (19)
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Specification