Navigation system, and program and storage medium for use in the same
AssigneeAisin Aw Co., Ltd.
InventorsTakanori Shimizu, Noboru Ishibashi, Kunihiro Yamada
Life of this patent
Estimating the term…
Abstract
A navigation system that searches for a route to a destination based on stored map data and provides navigation guidance to the destination along the route includes a controller that acquires road congestion information associated with the route, searches for the route to the destination based on a calculated search cost and changes a search cost based on predicted secondary congestion that is predicted based on acquired road congestion information, wherein a recommendable route that can avoid congestion is searched based on the search cost that has been changed based on the predicted secondary congestion.
Claims18
A navigation system that searches for a route to a destination based on stored map data and provides navigation guidance to the destination along the route, comprising:
- a controller that:
- acquires road congestion information associated with the route from outside a vehicle;
- searches for the route to the destination based on a calculated search cost;
- predicts secondary congestion that occurs due to current congestion based on acquired road congestion information;
- and
- changes a search cost based on the predicted secondary congestion, wherein a recommendable route that can avoid congestion is searched based on the search cost that has been changed based on the predicted secondary congestion.
A storage medium storing a set of program instructions executable on a data processing device and usable to search for a route to a destination based on stored map data and provide navigation guidance to the destination along the route, the instructions comprising:
- acquiring road congestion information associated with the route from outside a vehicle;
- searching for the route to the destination based on a calculated search cost;
- predicting secondary congestion that occurs due to current congestion based on the acquired road congestion information;
- changing a search cost based on the predicted secondary congestion;
- and
- searching for a recommendable route that can avoid congestion based on the changed search cost.
A storage medium storing a set of program instructions executable on a data processing device and usable to search for a route to a destination based on stored map data and provide navigation guidance to the destination along the route, the storage medium comprising:
- map data used in searching for a route and navigation guidance along the route;
- and
- the instructions comprising:
- acquiring road congestion information associated with the route from outside a vehicle;
- searching for the route to the destination based on a calculated search cost;
- predicting secondary congestion that occurs due to current congestion based on the acquired road congestion information;
- changing a search cost based on the predicted secondary congestion;
- and
- searching for a recommendable route that can avoid congestion based on the changed search cost.
Dependencies are inferred from the claim text.