Navigation server
First Claim
1. A navigation server which supports guiding of a mobile subject by a navigation device, by transmitting a road traffic information to the navigation device possessed by the mobile subject, the navigation server comprising:
- a support map storing unit which stores a support map information including a plurality of links expressed by a series of coordinates;
a first support processing element which receives positions at plural points in time of a first mobile subject from a probe device possessed by the first mobile subject as a probe information; and
a second support processing element which generates the road traffic information on the basis of the support map information and the probe information, and which transmits a part of or all of the road traffic information to the navigation device possessed by a second mobile subject;
wherein the second support processing element recognizes an area in which disaster occurred on the basis of communication with a disaster information source, extracts the links included in the area from a plurality of the links, calculates a deviation of the probe information from before and after the occurrence of the disaster, evaluates a cost for each of the extracted links by increasing and decreasing an initial value of the extracted links on the basis of the deviation, and generates the road traffic information on the basis of the cost.
1 Assignment
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Accused Products
Abstract
A navigation server capable of guiding a mobile subject such as an automobile by a navigation device, while appropriately evaluating the level of safeness of individual link in a disaster occurring area in consideration of the actual disaster condition is provided. According to the navigation server of the present invention, the links included in the disaster occurring area are extracted, and the cost of each of the extracted links is evaluated on the basis of the probe information. There is high probability that the spatial and temporal moving pattern of the automobile (a first mobile subject) represented by the probe information reflects the influence of the disaster. Therefore, the level of the safeness of individual link included in the disaster occurring area may be evaluated as the cost of individual link accurately in consideration of the actual disaster condition and road condition. Further, by transmitting the road traffic information generated on the basis of the cost of individual link to the navigation device, it becomes possible to make the navigation device guide the automobile (a second mobile subject) to avoid the influence of the disaster in consideration of the actual disaster condition and road condition.
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Citations
6 Claims
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1. A navigation server which supports guiding of a mobile subject by a navigation device, by transmitting a road traffic information to the navigation device possessed by the mobile subject, the navigation server comprising:
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a support map storing unit which stores a support map information including a plurality of links expressed by a series of coordinates; a first support processing element which receives positions at plural points in time of a first mobile subject from a probe device possessed by the first mobile subject as a probe information; and a second support processing element which generates the road traffic information on the basis of the support map information and the probe information, and which transmits a part of or all of the road traffic information to the navigation device possessed by a second mobile subject; wherein the second support processing element recognizes an area in which disaster occurred on the basis of communication with a disaster information source, extracts the links included in the area from a plurality of the links, calculates a deviation of the probe information from before and after the occurrence of the disaster, evaluates a cost for each of the extracted links by increasing and decreasing an initial value of the extracted links on the basis of the deviation, and generates the road traffic information on the basis of the cost. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification