Route searching method in navigation system

• US 20050288855A1
• Filed: 06/24/2005
• Published: 12/29/2005
• Est. Priority Date: 06/25/2004
• Status: Active Grant

• Current Assignee: Clarion Co., Ltd. (Faurecia SA)
• Original Assignee: Clarion Co., Ltd. (Faurecia SA)
• Inventors: Sano, Katsumi
• Granted Patent: US 7,801,678 B2
• Time in Patent Office: Days
• US Class Current: 701/209
• CPC Class Codes: G01C 21/3453 Special cost functions, i.e. other than distance or default speed limit of road segments
• CPC Class Codes: G01C 21/3461 Preferred or disfavoured areas, e.g. dangerous zones, toll or emission zones, intersections, manoeuvre types, segments such as motorways, toll roads, ferries

Abstract

In a navigation system mounted on a moving object, when the current position exists on a road with time-based regulation on map data, route search is retried ignoring the time-based regulation. It is further possible to conduct the route search ignoring only the time-based regulation on the road where the current position is located.

Claims

1. A route search method in an in-vehicle type navigation system, wherein,

when a route search is conducted on a road with a time-based regulation on map data, the route search is conducted ignoring at least the time-based regulation on the road on which a moving object currently exists.

2. A route search method in an in-vehicle type navigation system that is mounted on a moving object having a current position detecting function, wherein,

said navigation system comprises a storage device that stores time-based regulation information which is relating to time-based regulations of respective links constituting a road on a map, and performs,

a route search step which searches for a route, avoiding a link with the time-based regulation by using said time-based regulation information, and

a route search retrying step which conducts the route search ignoring said time-based regulation information, when said moving object deviates from the route searched by said route search step and the current position exists on the link with the time-based regulation.

5. The route search method in the in-vehicle type navigation system according to either of claims 2 and 3, wherein,

said route search step searches for a route avoiding a link with the time-based regulation in a time zone determined by a departure time, by using said time-based regulation information.

3. A route search method in an in-vehicle type navigation system that is mounted on a moving object having a current position detecting function, wherein,

said navigation system comprises a storage device that stores time-based regulation information which is relating to time-based regulations of respective links constituting a road on a map, and performs,

a route search step which searches for a route, avoiding a link with the time-based regulation by using said time-based regulation information, and

a route search retrying step which conducts the route search ignoring said time-based regulation information of the link, when said moving object deviates from the route searched by said route search step and the current position exists on the link with the time-based regulation.

4. The route search method in the in-vehicle type navigation system according to claim 3, wherein,

if the search fails in said route search retrying step, the route search is conducted ignoring said time-based regulation information.