System and method for providing an improved terrestrial subsystem for use in mobile satellite systems

• US 20070281611A1
• Filed: 06/05/2006
• Published: 12/06/2007
• Est. Priority Date: 06/05/2006
• Status: Active Grant

• Current Assignee: Globalstar Incorporated
• Original Assignee: Globalstar Incorporated
• Inventors: Gallagher, Vijaya, Monte, Paul A.
• Granted Patent: US 8,179,832 B2
• Time in Patent Office: Days
• US Class Current: 455/13.200
• CPC Class Codes: H04B 7/18519 Operations control, administration or maintenance
• CPC Class Codes: H04B 7/18563 Arrangements for interconnecting multiple systems data switching networks H04L12/00
• CPC Class Codes: H04W 28/16 Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]

Abstract

A system or method is disclosed which employs filters on a satellite whose bandwidth is varied by ground command to restrict interference experienced by a satellite as an auxiliary terrestrial component (ATC) system is increased to a multiplicity of cities and markets. Thus there is provided a novel method and system which optimizes overall MSS and ATC traffic.

Claims

1. A method for maximizing ATC and MSS capacity in a combination ATC/MSS system where the ATC coverage area overlaps the MSS coverage area comprising:

assigning a first frequency F1 to the ATC component;

dynamically setting a filter on the satellite to suppress F1; and

allocating frequencies other than F1 to the MSS component.

2. The method as defined in claim 1 wherein the ATC and MSS capacity is provided by a LEO constellation comprising at least one satellite.

3. The method as defined in claim 1 wherein the ATC and MSS capacity is provided by a MEO constellation comprising at least one satellite.

4. The method as defined in claim 1 wherein the ATC and MSS capacity is provided by a GEO constellation comprising at least one satellite.

5. The method as defined in claim 1 wherein the ATC and MSS capacity is provided by an HEO constellation comprising at least one satellite.

6. The method as defined in claim 1 wherein the ATC and MSS capacity is provided by a combination of LEO, MEO, GEO and HEO satellites

7. The method as defined in claim 1 wherein said dynamically setting a filter on the satellite to suppress F1 comprises switching in a filter based on a command transmitted from a ground location.

8. The method as defined in claim 1 wherein said dynamically setting a filter on the satellite to suppress F1 comprises switching in a filter on a predetermined time schedule.

9. The method as defined in claim 1 wherein said allocating frequencies comprises employing random assignment of said frequencies.

10. The method as defined in claim 1 wherein said allocating frequencies comprises employing an algorithm.

11. The method as defined in claim 10 wherein said algorithm is employed to select frequencies sequentially based on a determination of which frequencies have least interference.

12. The method as defined in claim 1 wherein said allocating frequencies comprises determining which frequency is least occupied by desired users.

13. A system for maximizing ATC and MSS capacity in a combination ATC/MSS system wherein the ATC coverage area overlaps the MSS coverage area comprising:

means for assigning a first frequency F1 to the ATC component;

means for dynamically setting a filter on a satellite to suppress F1; and

means for allocating frequencies other than F1 to the MSS component.

14. The system as defined in claim 13 wherein said system employs a LEO constellation comprising at least one satellite.

15. The system as defined in claim 13 wherein said system employs a MEO constellation comprising at least one satellite.

16. The system as defined in claim 13 wherein said system employs a GEO constellation comprising at least one satellite.

17. The system as defined in claim 13 wherein said system employs an HEO constellation comprising at least one satellite.

18. The system as defined in claim 13 wherein said system employs a constellation that is a combination of LEO, MEO, GEO and HEO satellites each comprising at least one satellite.

19. The system as defined in claim 13 wherein said dynamically setting a filter on the satellite to suppress frequency F1 is accomplished by switching in a filter based on a command transmitted from a ground location.

20. The system as defined in claim 13 wherein said dynamic setting of filters comprises switching in on a predetermined time schedule.

21. The system as defined in claim 13 wherein said allocating comprises employing an algorithm for selecting frequencies sequentially.

22. The system as defined in claim 21 wherein said algorithm for selecting frequencies sequentially is based on a determination of which frequencies have least interference.

23. The system as defined in claim 13 wherein assigning the frequency comprises random assignment.