Bandwidth and memory conserving methods for a vehicle navigation system
First Claim
1. In a vehicle navigation system, a method for displaying a travel route, comprising the steps of:
- (a) determining a current location of the vehicle navigation system;
(b) receiving traffic information packets from a remote location, each traffic information packet comprising at least one assigned weight factor;
(c) determining for each traffic information packet received in said step (b) whether the at least one assigned weight factor meets a threshold priority level;
(d) filtering any traffic information packets for which the respective at least one assigned weight factor does not meet the threshold priority level;
(e) calculating the travel route, based at least in part on any traffic information packets for which the respective at least one assigned weight factor meets the threshold priority level; and
(f) displaying the calculated travel route on a visual display screen.
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Abstract
The present invention is directed specifically to methods for reducing the bandwidth requirements for broadcasting traffic information to a vehicle navigation system. The traffic information broadcast to the system using the bandwidth conserving methods of the present invention generally includes traffic flow information and traffic incident information. In one embodiment, the vehicle navigation system filters traffic information to a certain range to expedite traffic calculation, to save on processing hardware, and to reduce bandwidth needs. Alternately, bandwidth conservation may be achieved by providing weight factors and threshold prioritizing when a broadcast limit is close to being reached or exceeded. In another embodiment, bandwidth reduction is achieved by not broadcasting free-flow traffic information and/or displaying only traffic information that indicates a traffic problem. Another method of the present invention to reduce bandwidth needs is directed to reducing broadcast of static traffic information.
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Citations
38 Claims
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1. In a vehicle navigation system, a method for displaying a travel route, comprising the steps of:
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(a) determining a current location of the vehicle navigation system; (b) receiving traffic information packets from a remote location, each traffic information packet comprising at least one assigned weight factor; (c) determining for each traffic information packet received in said step (b) whether the at least one assigned weight factor meets a threshold priority level; (d) filtering any traffic information packets for which the respective at least one assigned weight factor does not meet the threshold priority level; (e) calculating the travel route, based at least in part on any traffic information packets for which the respective at least one assigned weight factor meets the threshold priority level; and (f) displaying the calculated travel route on a visual display screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In a vehicle navigation system, a method for displaying at least one travel route, comprising the steps of:
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(a) determining a current location of the vehicle navigation system; (b) receiving traffic information from the remote location; (c) determining whether the traffic information received in said step (b) relates to traffic conditions located within a first distance from the vehicle navigation system; (d) filtering traffic information that is determined in said step (c) to relate to traffic conditions located farther than the first distance from the vehicle navigation system; (e) calculating a first travel route, based at least in part on any traffic information received in said step (b) that relates to traffic conditions located within the first distance from the vehicle navigation system; and (f) displaying the calculated first travel route on a visual display screen. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. In a vehicle navigation system, a method for displaying at least one travel route, comprising the steps of:
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(a) determining a current location of the vehicle navigation system; (b) receiving traffic information from the remote location; (c) determining whether the traffic information received in said step (b) exceeds a first level of memory capacity of the vehicle navigation system; (d) filtering the traffic information received in said step (b) when it is determined in said step (c) that the traffic information exceeds the first level; (e) calculating a travel route between a first location and a second location, based at least in part on the traffic information received in said step (b); and (f) displaying the calculated travel route on a visual display screen. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. In a vehicle navigation system, a method for displaying a travel route, comprising the steps of:
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(a) determining a current location of the vehicle navigation system; (b) receiving traffic information that relates to traffic conditions located within a first distance from the vehicle navigation system from a remote location; (c) determining whether the traffic information received in said step (b) exceeds a first level of memory capacity of the vehicle navigation system; (d) acquiring additional traffic information that relates to traffic conditions located within a second distance from the vehicle navigation system from the remote location, when it is determined in said step (c) that the traffic information does not exceed the first level of the memory capacity; (e) calculating the travel route, based at least in part upon the traffic information received in said step (b) and any additional traffic information acquired in said step (d); and (f) displaying the calculated travel route on a visual display screen. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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Specification