Navigation and positioning system and method for a vehicle

• US 5,911,774 A
• Filed: 05/30/1997
• Issued: 06/15/1999
• Est. Priority Date: 11/20/1996
• Status: Expired due to Fees

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Itoh, Tetsuya
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Assistant Examiner(s): Wyckoff, Timothy R.
• Application Number:
  US08/866,388
• Time in Patent Office: 746 Days
• Field of Search: 701/200, 701/35, 701/49, 701/201, 701/207, 701/212, 701/213, 340/988, 340/990, 340/995, 342/357, 342/450, 342/451
• US Class Current: 701/207
• CPC Class Codes: G01C 21/26 specially adapted for navigation in a road network

Abstract

A navigation system detects a position of a vehicle, determines an area (i.e., a State) associated with the position of the vehicle, selects and loads a program corresponding to the area for controlling the provision of one or more navigation functions, and navigates the vehicle according to the loaded program. The program is based on a rule as to a navigation that is function enforced in the area in which the vehicle is located.

Claims

1. A navigation and positioning system for a vehicle, comprising:

a programmable navigator to navigate a vehicle;

a detector to detect a vehicle position of said vehicle; and

a configurer to load a program into said navigator that restricts at least one of (1) user input information accepted by said navigation and positioning system and (2) navigation information supplied to a user by said navigation and positioning system, depending on a navigation rule enforced at the position of said vehicle detected by said detector, said configurer operating to load said program based on the position of said vehicle detected by said detector.

2. The navigation and positioning system as defined in claim 1, further comprising:

a program memory to store a first program as said program, with said first program being based on a respective rule enforced in a first area;

an area searcher to determine whether the position of said vehicle is within said first area; and

wherein said configurer loads said first program corresponding to said first area if the position of said vehicle is within said first area.

3. The navigation and positioning system as defined in claim 1, wherein:

said navigator has a plurality of navigation functions, with said functions being performed by a plurality of navigation function programs respectively, and further wherein said navigator is designed to switch navigation function programs based on the detected position of said vehicle.

4. The navigation and positioning system as defined in claim 1, further comprising:

a road memory to store said program, wherein said program provides information corresponding to a road;

a road searcher to determine whether said vehicle is located on said road; and

wherein said configurer loads said program corresponding to said road.

5. The navigation and positioning system as defined in claim 2, further comprising:

an input device operated by a user of said vehicle to input a destination signal into said navigator; and

wherein said first program restricts operation of said input device by said user based on a rule restricting said operation in said first area.

6. The navigation and positioning system as defined in claim 2, further comprising:

a display device to indicate navigation information to a user; and

wherein said first program restricts display of said navigation information by said display based on a rule restricting said navigation in said first area.

7. The navigation and positioning system as defined in claim 2, further comprising:

a map memory to store a map representing an overall area; and

wherein said area searcher is designed to determine the position of said vehicle on said map, with said map including said first area.

8. The navigation and positioning system as defined in claim 7, further comprising:

a display device to display said map to a user, with said map being retrieved from said map memory; and

wherein said first program is designed to restrict the display of said map on said display device based on a rule restricting the display of the map in said first area.

9. The navigation and positioning system as defined in claim 7, wherein:

said map memory stores said map as a plurality of divisions, said divisions being formed by dividing said map;

wherein said map memory storing an area associated with each of said divisions; and

wherein said area searcher determines the area associated with the division in which said vehicle is positioned.

10. The navigation and positioning system as defined in claim 7, wherein:

said map memory stores a plurality of links, each of said links respectively representing a road on said map, said map memory storing an area associated with each of said links; and

wherein said area searcher determines the area associated with the link on which said vehicle is positioned.

11. The navigation and positioning system as defined in claim 10, wherein:

said map memory stores a location on said link showing a border between a plurality of said areas, said map memory storing an area corresponding to one side of said border on said link, and another area corresponding to another side of said border on said link; and

wherein said area searcher determines whether said vehicle is positioned in said first area based on the position of said vehicle on said link in relation to the location of said border.

12. A computer program embodied on computer-readable medium for navigating a vehicle, comprising:

a command program to retrieve a position of a vehicle detected by a detector;

a subprogram to implement a rule controlling navigation functions of a navigator, said subprogram restricting at least one of (1) user input information accepted by said navigator and (2) navigation information supplied by said navigator to a vehicle user, depending on the rule enforced at the position of said vehicle detected by said detector,; and

first code elements for loading said subprogram into said navigator.

13. The computer program as defined in claim 12, wherein:

the first code elements include an area search program to determine whether said position of said vehicle is located within the area in which said rule is enforced;

second code elements for associating said subprogram with said area; and

third code elements for loading said subprogram that is associated with said area in which said vehicle is located.

14. The computer program as defined in claim 12, further comprising a plurality of subprograms, wherein each subprogram includes a plurality of navigation function programs, said navigation function programs performing a plurality of navigation functions respectively on said navigator, and further wherein said navigation functions are performed based on the subprogram that has been selected and loaded.

15. The computer program as defined in claim 13, wherein:

said subprogram comprises a program for restricting the display of a navigation on a display device based on a rule restricting said navigation in a first area.

16. The computer program as defined in claim 13, further comprising:

map data representing a plurality of different areas; and

wherein said area search program determines a particular area in said plurality of different areas in which said vehicle is located according to said map data.

17. The computer program as defined in claim 16, wherein:

said map data comprises a plurality of divisions, said divisions being formed by dividing said map; and

said area search program determines said particular area corresponding to the one of said divisions on said map in which the position of said vehicle is located.

18. The computer program as defined in claim 16, wherein:

said map data comprises a plurality of links, each of said links respectively representing a road on said map, said map data associating one of said plurality of areas with each of said links; and

wherein said area search program determines said particular area for a link on which said vehicle is positioned.

19. The computer program as defined in claim 18, wherein:

said map data comprises a location on said link showing a border between a plurality of said areas, with one of said plurality of areas on one side of said border, and with another one of said plurality of areas on another side of said border; and

wherein said area search program determines said particular area in which said vehicle is positioned, according to the position of said vehicle on said link in relation to said location of said border.

20. The computer program as defined in claim 18, wherein said map data further comprises:

a node to define one of the end of said link on said map, and said node representing the location of the border of said plurality of areas on the road.

21. A data structure on a machine-readable medium for implementing a navigation system for a vehicle, comprising:

map data including data to delineate an area, in machine-readable form; and

a codeword associated with said area in said data structure and functioning in a computer navigation system to cause said computer navigation system for a vehicle to execute a particular subprogram that is associated with said codeword in said computer navigation system, said subprogram implementing a navigation rule by restricting at least one of (1) user input information accepted by said computer navigation system and (2) navigation information supplied to a user by said computer navigation system, depending on said codeword.

22. The data structure as defined in claim 21, wherein:

said map data includes data delineating a plurality of areas, with a codeword associated with each of said plurality of areas in said data structure, with different codewords causing different subprograms to be executed in said computer navigation system, to thereby cause different navigation rules to be implemented.

23. The data structure as defined in claim 22, wherein:

said map data comprises a plurality of divisions, said divisions being formed by dividing said map.

24. The data structure as defined in claim 22, wherein:

said map data comprises a plurality of links, each of said links respectively representing a road on said map, said map data comprising each of said links and an area therefor.

25. The data structure as defined in claim 24, wherein:

said map data stores a location on said link showing a border between a plurality of said areas, said map data including an area corresponding to one side of said border on said link, and another area corresponding to another side of said border on said link.

26. The data structure as defined in claim 24, wherein said map data further comprises:

a node to define one of the ends of said link associated with a location thereof on said map, and said node representing a border of said areas on said road.

27. A method for navigating a vehicle, comprising the steps of:

detecting a position of said vehicle;

associating an area with said detected position from a plurality of different areas;

supplying navigation information to, and accepting information input by, a user of said vehicle; and

restricting at least one of (1) user input information and (2) navigation information supplied to a vehicle user, based on a rule associated with the area associated with said detected position of said vehicle.

28. The method for navigating and positioning a vehicle as defined in claim 27, further comprising the steps of:

retrieving a map which includes said plurality of areas; and

determining said area in which said vehicle is positioned according to said map.

29. The method for navigating a vehicle as defined in claim 28, further comprising the steps of:

determining one of a plurality of divisions of said map in which said vehicle is positioned, said divisions being formed by dividing said map; and

determining said area of said map in which said vehicle is positioned according to said division.