System and method for managing access of a fleet of mobile machines to a resource having multiple entry points

• US 5,897,595 A
• Filed: 12/19/1996
• Issued: 04/27/1999
• Est. Priority Date: 12/19/1996
• Status: Expired due to Term

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Kemner, Carl A., Koehrsen, Craig L., Hawkins, Mark R.
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Assistant Examiner(s): WYCKOFF, TIMOTHY R
• Application Number:
  US08/770,208
• Time in Patent Office: 859 Days
• Field of Search: 701/23, 701/24, 701/50, 701/117, 701/213, 701/300, 701/301, 701/302, 340/430, 340/909, 340/910, 340/916, 342/454, 342/456
• US Class Current: 701/23
• CPC Class Codes: G05D 1/0236 in combination with a laser lasers per se H01S
• CPC Class Codes: G05D 1/027 comprising intertial navigation means, e.g. azimuth detector inertial navigation G01C21/16; inertial navigation combined with non-inertial navigation instruments G01C21/165
• CPC Class Codes: G05D 1/0278 using satellite positioning signals, e.g. GPS
• CPC Class Codes: G05D 1/0297 by controlling means in a control room

Abstract

The invention is a system and method for managing a resource having multiple entry points. Each mobile machine includes a queue manager for generating a queue position request upon approach to the resource. A resource manager establishes queues, one for each entry point to the resource, to control access to the resource. Upon receiving a queue position request from an approaching mobile machine, the resource manager determines which queue to place the mobile machine, and then generates a queue position and sends a queue position signal to the approaching mobile machine.

Claims

1. A system for managing a resource shared by at least one mobile machine, said resource including a first entry point and a second entry point, comprising:

a queue manager located on each of said at least one mobile machine, said queue manager being adapted to generate a queue position request signal in response to one of said at least one mobile machine approaching said resource; and

a resource manager adapted to establish a first queue and a second queue to control access to said resource, said first queue and said second queue corresponding to said first entry point and said second entry point respectively, said resource manager being adapted to receive said queue position request signal and responsively determine a queue position in one of said first queue and said second queue and responsively communicate a queue position signal to said one of said at least one mobile machine.

2. A system, as set forth in claim 1, wherein said resource manager is adapted to determine one of said first queue and said second queue to allow access to said resource.

3. A system, as set forth in claim 1, wherein said resource manager is adapted to allow one of said first queue and said second queue access to said resource in response to a condition of said resource.

4. A system, as set forth in claim 1, wherein said queue position request signal includes data disclosing a mobile machine identification, a mobile machine priority, and a requested route.

5. A system, as set forth in claim 1, wherein said resource manager is adapted to associate a time tag to received said queue position request signal.

6. A system, as set forth in claim 1, wherein said queue position signal includes data disclosing an entry point position and a determination of a number of mobile machines in one of said first queue and said second queue, and wherein said queue manager is adapted to determine said queue position in response to said queue position signal.

7. A system, as set forth in claim 1, wherein said resource is an intersection.

8. A system, as set forth in claim 7, wherein said resource manager is adapted to determine a configuration of said intersection.

9. A system, as set forth in claim 8, wherein said intersection also includes at least one intersection route and at least one exit point.

10. A system, as set forth in claim 1, wherein said resource manager is adapted to selectively deliver a blocking signal to prevent said mobile machines in said first queue and second queue from accessing said intersection.

11. A method for managing a resource shared by at least one mobile machine, each of said at least one mobile machine including a queue manager, said queue manager being adapted to generate a queue position request signal in response to said one of said at least one mobile machine approaching said resource, said resource including a first entry point and a second entry point, the method comprising:

establishing a first queue and a second queue to control access to said resource, said first queue and said second queue corresponding to said first entry point and said second entry point, respectively;

receiving a queue position request signal from said one of said at least one mobile machine;

responsively determining a queue position in one of said first queue and said second queue; and

communicating said queue position to said one of said at least one mobile machine.

12. A method, as set forth in claim 11, wherein responsively determining a queue position includes determining said queue position in response to a determination of the number of said mobile machines in one of said first queue and said second queue.

13. A method, as set forth in claim 11, including the steps of:

determining a condition of availability of said resource to receive said one of said at least one mobile machine;

determining one of said first queue and said second queue to allow access to said resource; and

determining when to allow said one of said first queue and said second queue to access said resource.

14. A method, as set forth in claim 11, including the step of defining said resource as an intersection.

15. A method, as set forth in claim 14, including the step of determining a configuration of said intersection.

16. A method, as set forth in claim 15, wherein determining a configuration includes the steps of determining said first entry point and said second entry point, determining at least one intersection route, and determining at least one exit point.

17. A method, as set forth in claim 11, including the step of said queue position request signal delivering data disclosing a mobile machine identification, a mobile machine priority, and a requested route.

18. A method, as set forth in claim 11, including the step of associating a time tag with said queue position request signal.

19. A method, as set forth in claim 13, wherein the step of determining one of said first queue and said second queue to allow access to said resource is performed in response to a scheduling strategy.

20. A method, as set forth in claim 19, including the step of determining said scheduling strategy as a function of said mobile machine priority and said time tag.

21. A method, as set forth in claim 11, including the step of selectively enabling a first and a second mobile machine to access said resource simultaneously.

22. A method, as set forth in claim 11, wherein communicating said queue position includes the step of communicating data disclosing an entry point position and a determination of a number of said mobile machines in one of said first queue and said second queue, and wherein said queue manager is adapted to determine said queue position as a function of said entry point position and said number of said mobile machines.