ROUTE CALCULATION METHOD FOR A VEHICLE NAVIGATION SYSTEM
First Claim
1. A method for filtering traffic information broadcast from a one-to-many network to a user of a vehicle navigation system, comprising the steps of:
- determining whether a broadcast of the traffic information is received by the vehicle navigation system from at least a first terrestrial repeater and a second terrestrial repeater;
determining a current position of the vehicle navigation system based on at least the received broadcast from the first terrestrial repeater and the second terrestrial repeater;
determining a traffic filtering radius specified by the vehicle navigation system;
filtering the received traffic information using the specified filtering radius around the determined current position of the vehicle navigation system;
discarding received traffic information that relates to traffic conditions located outside the specified filtering radius around the determined current position of the vehicle navigation system;
receiving the filtered traffic information that relates to traffic conditions located inside the specified filtering radius at the vehicle navigation system;
providing a scrollable list of applicable freeways associated with the filtered traffic information to the user on a traffic display;
providing an option to allow the user to select one of the applicable freeways that are provided in the scrollable list; and
displaying details of traffic conditions to a user on the traffic display for a selected one of the applicable freeways.
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Accused Products
Abstract
Traffic information, including flow information and incident information, obtained through a traffic management system for providing and facilitating the exchange of traffic information between a remote location and a vehicle may be used in route calculation by a navigation device. The navigation device may recalculate a route based on anticipated user error. Alternatively, the navigation device may recalculate a route using received traffic information triggered by the receipt of a traffic information update, or triggered by the passage of an amount of time. The broadcast rate of traffic information updates may vary temporally (providing more frequent updates during peak commute times) or geographically (providing more frequent updates to metropolitan areas with increased traffic information needs). If route calculation is triggered by an elapsed amount of time, the amount of time may vary to be shorter during peak commute times. Additional route calculation techniques allow the incorporation of historical traffic information or the use of the most recent traffic information if incomplete traffic information is available. Still further route calculation techniques may calculate a best route by avoiding zigzagging or evaluating an assigned cost of a potential route.
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Citations
17 Claims
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1. A method for filtering traffic information broadcast from a one-to-many network to a user of a vehicle navigation system, comprising the steps of:
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determining whether a broadcast of the traffic information is received by the vehicle navigation system from at least a first terrestrial repeater and a second terrestrial repeater; determining a current position of the vehicle navigation system based on at least the received broadcast from the first terrestrial repeater and the second terrestrial repeater; determining a traffic filtering radius specified by the vehicle navigation system; filtering the received traffic information using the specified filtering radius around the determined current position of the vehicle navigation system; discarding received traffic information that relates to traffic conditions located outside the specified filtering radius around the determined current position of the vehicle navigation system; receiving the filtered traffic information that relates to traffic conditions located inside the specified filtering radius at the vehicle navigation system; providing a scrollable list of applicable freeways associated with the filtered traffic information to the user on a traffic display; providing an option to allow the user to select one of the applicable freeways that are provided in the scrollable list; and displaying details of traffic conditions to a user on the traffic display for a selected one of the applicable freeways. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for filtering traffic information broadcast from a one-to-many network to a user of a vehicle navigation system, comprising the steps of:
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determining whether the vehicle navigation system is in a range of a multiple source data broadcast area; when the vehicle navigation system is in the range of the multiple source data broadcast area, determining a current position of the vehicle navigation system based on at least a delay in multiple broadcast signals received from a first terrestrial repeater and a second terrestrial repeater; determining a traffic filtering radius specified by the vehicle navigation system; filtering the received traffic information using the specified filtering radius around the determined current position of the vehicle navigation system; discarding received traffic information that relates to traffic conditions located outside the specified filtering radius around the determined current position of the vehicle navigation system; receiving the filtered traffic information that relates to traffic conditions located inside the specified filtering radius at the vehicle navigation system; and displaying details of traffic conditions located inside the specified filtering radius to a user on a display associated with the vehicle navigation system. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification