Method and system for routing using uncertainty data
First Claim
Patent Images
1. A computer-implemented method for route calculation, the method comprising:
- at a navigation system, receiving a destination;
the navigation system calculating a route from a current position to the destination, wherein the route is a sequence of road segments;
retrieving data indicative of a geographic position for at least one road segment from a geographic database associated with the navigation system;
retrieving a distribution function for an attribute describing the at least one road segment from the geographic database associated with the navigation system, wherein the attribute is different than the geographic position, wherein the distribution function represents uncertainty that the attribute is accurate; and
providing an output that includes information about the uncertainty in the route.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and system for routing using uncertainty data is disclosed. The uncertainty data is associated with geographic data. The uncertainty data includes a distribution function that represents the probability that the geographic data is accurate. A routing application uses the uncertainty data during or after route calculation. The routing application provides one or more routes and information about the routes based on the uncertainty data.
15 Citations
24 Claims
-
1. A computer-implemented method for route calculation, the method comprising:
-
at a navigation system, receiving a destination; the navigation system calculating a route from a current position to the destination, wherein the route is a sequence of road segments; retrieving data indicative of a geographic position for at least one road segment from a geographic database associated with the navigation system; retrieving a distribution function for an attribute describing the at least one road segment from the geographic database associated with the navigation system, wherein the attribute is different than the geographic position, wherein the distribution function represents uncertainty that the attribute is accurate; and providing an output that includes information about the uncertainty in the route. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 24)
-
-
12. A computer-implemented method for route calculation, the method comprising:
-
receiving an origin and a destination; calculating a route from the origin and the destination using a probability-based routing algorithm based on geographic position data and an uncertainty cost that describes an accuracy of data for at least one attribute of a road segment, wherein the attribute is different than the geographic position data, along the route; and providing probability information regarding the route. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A computer-implemented method for route calculation, the method comprising:
-
receiving an origin and a destination; calculating a route from the origin and the destination using a probability-based routing algorithm based on an uncertainty cost that describes an accuracy of data for at least one attribute of a road segment along the route; and providing probability information regarding the route, wherein the uncertainty cost represents uncertainty in a slope value stored in a geographic database, uncertainty in historic traffic data stored in the geographic database, uncertainty in a public transportation schedule stored in the geographic database, or uncertainty in a speed category value stored in the geographic database.
-
-
22. A computer-implemented method for route calculation, the method comprising:
-
at a navigation system, receiving a destination; the navigation system calculating a route from a current position to the destination, wherein the route is a sequence of road segments; retrieving a distribution function for an attribute associated with a road segment from a geographic database associated with the navigation system, wherein the distribution function represents uncertainty; and providing an output that includes information about the uncertainty in the route, wherein the distribution function represents uncertainty in a slope value stored in the geographic database, uncertainty in historic traffic data stored in the geographic database, uncertainty in a public transportation schedule stored in the geographic database, or uncertainty in a speed category value stored in the geographic database.
-
-
23. A method, further comprising:
-
receiving a destination; calculating a route from a current position to the destination, wherein the route is a sequence of road segments; retrieving geographic position data for at least one road segment from a geographic database associated with the navigation system; retrieving a distribution function for an attribute associated with at least one road segment from the geographic database associated with the navigation system, wherein the distribution function represents uncertainty that the attribute is accurate; and providing an output that includes information about the uncertainty in the route, wherein the distribution function represents uncertainty in a slope value stored in the geographic database, uncertainty in historic traffic data stored in the geographic database, uncertainty in a public transportation schedule stored in the geographic database, or uncertainty in waiting time to cross an intersection.
-
Specification