Navigation System, Route Search Device, Navigation Device, and Program
First Claim
1. A navigation system comprising a navigation device and a route search device, said navigation system characterized in that the navigation device comprises a route search request section and a bearing detection section, wherein the bearing detection section detects a bearing at which the navigation device is oriented;
- the route search request section transmits said bearing as a route search request, in addition to a destination and a current position or departure point of the navigation device, to the route search device;
the route search device comprises a route network database that is composed of links for connecting nodes and of costs of said links, wherein the nodes are ends of a route, intersections, turnoff points, and the like, and further comprises a route search section for referencing the route network database and searching a route to a destination from said current position or departure point; and
the route search section selects a link that is in a direction near an orientation of the navigation device from among links in the vicinity of a current position or departure point of said navigation device, and initiates a route search.
1 Assignment
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Accused Products
Abstract
A navigation device (30) has a route search request section (32) and a bearing detection section (36). The route search request section (32) sends, as a route search request, to a route search device a bearing that is detected by the bearing detection section (36), in addition to a current position or departure point of and a destination of the navigation device. The route search device (20) has a route search section (24) for searching for a route from the current position or departure point to the destination by referring to a route network database (28) that is constructed from links making connection between nodes of the links and from costs of the links. The route search device (20) starts a route search after selecting a link in a direction close to the orientation of the navigation device, the link being a link out of the links near the current position or departure point of the navigation device. The navigation device performs a route search according to a direction in which a walker or an automobile starts to move or is moving, and this enables an effective route search.
37 Citations
11 Claims
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1. A navigation system comprising a navigation device and a route search device, said navigation system characterized in that
the navigation device comprises a route search request section and a bearing detection section, wherein the bearing detection section detects a bearing at which the navigation device is oriented; -
the route search request section transmits said bearing as a route search request, in addition to a destination and a current position or departure point of the navigation device, to the route search device;
the route search device comprises a route network database that is composed of links for connecting nodes and of costs of said links, wherein the nodes are ends of a route, intersections, turnoff points, and the like, and further comprises a route search section for referencing the route network database and searching a route to a destination from said current position or departure point; and
the route search section selects a link that is in a direction near an orientation of the navigation device from among links in the vicinity of a current position or departure point of said navigation device, and initiates a route search. - View Dependent Claims (2, 3, 7)
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4. A route search device that constitutes a navigation system comprising a route search request section and a bearing detection section, wherein the bearing detection section detects a bearing at which the navigation device is oriented, and the route search request section transmits said bearing as a route search request, in addition to a destination and a current position or departure point of the navigation device, to the route search device;
- said route search device characterized in comprising;
a route network database that is composed of links for connecting nodes and of costs of said links, wherein the nodes are ends of a route, intersections, turnoff points, and the like; and
a route search section for referencing the route network database and searching a route to a destination from said current position or departure point;
whereinthe route search section selects a link that is in a direction near an orientation of the navigation device from among links in the vicinity of a current position or departure point of said navigation device, and initiates a route search. - View Dependent Claims (5, 6)
- said route search device characterized in comprising;
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8. A program characterized in comprising executing a routine as a search direction determination section for selecting, as a departure link, a link that is in a direction that is near the orientation of a navigation device from among links in the vicinity of a current position or departure point of a navigation device on the basis of bearing information included in said route search request, and initiating a route search in a computer that constitutes a route search device in a navigation system comprising a navigation device and a route search device, wherein
the navigation device has a route search request section and a bearing detection section; -
the bearing detection section detects a bearing at which the navigation device is oriented;
the route search request section transmits said bearing as a route search request, in addition to a destination and a current position or departure point of the navigation device, to the route search device; and
the route search device comprises a route network database that is composed of links for connecting nodes and of costs of said links, wherein the nodes are ends of a route, intersections, turnoff points, and the like, and further comprises a route search section for referencing the route network database and searching a route to a destination from said current position or departure point. - View Dependent Claims (9, 10)
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11. A program characterized in comprising:
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executing a function as a bearing detection section for detecting a bearing at which a navigation device is oriented; and
executing a routine as a route search request section for transmitting said bearing as a route search request, in addition to a destination and a current position or departure point of the navigation device, to a route search device in a computer that constitutes a navigation device in a navigation system that comprises;
a navigation device provided with a route search request section and a bearing detection section, wherein the bearing detection section detects a bearing at which the navigation device is oriented; and
the route search request section transmits said bearing as a route search request, in addition to a destination and a current position or departure point of the navigation device, to the route search device; and
a route search section that has a route network database composed of links for connecting nodes and of costs of said links, wherein the nodes are ends of a route, intersections, turnoff points, and the like, and that further has a search direction determination section, wherein said route network database is referenced and a route to a destination from said current position or departure point is searched.
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Specification