Satellite system architecture for coverage areas of disparate demand

• US 10,727,933 B2
• Filed: 03/28/2019
• Issued: 07/28/2020
• Est. Priority Date: 10/16/2009
• Status: Active Grant

• Current Assignee: ViaSat Incorporated
• Original Assignee: ViaSat Incorporated
• Inventors: Hudson, Erwin C.
• Primary Examiner(s): Sefcheck, Gregory B
• Assistant Examiner(s): Esmaeilian, Majid
• Application Number:
  US16/368,702
• Publication Number:
  US 20190222300A1
• Time in Patent Office: 488 Days
• Field of Search: 370316
• CPC Class Codes: H04B 7/185 Space-based or airborne stations; Stations for satellite systemsH04B7/204 takes precedence
• CPC Class Codes: H04B 7/18513 Transmission in a satellite or space-based system
• CPC Class Codes: H04B 7/18576 Satellite systems for providing narrowband data service to fixed or mobile stations, e.g. using a minisatellite, a microsatellite for selecting H04W
• CPC Class Codes: H04B 7/2041 Spot beam multiple access

Abstract

Disclosed is a satellite communication system that allocates bandwidth to maximize the capacity of the communication system while providing service to geographical areas having different demands. A smaller portion of the frequency spectrum can be allocated for subscriber beams that supply service to low demand areas. A larger portion of the frequency spectrum can be provided to subscriber beams that provide access to high demand areas. Allocation of bandwidth can be determined by the amount of demand in low demand areas versus the amount of demand in high demand areas. High demand gateways are physically located in low demand subscriber beams, while low demand gateways are physically located in high demand subscriber beams, which prevents interference.

Claims

1. A method in a multi-beam satellite for providing satellite communication services to a service area via a plurality of subscriber beams over a system bandwidth, the method comprising:

relaying communications between a first gateway beam and a first set of subscriber beams of the plurality of subscriber beams, the first set of subscriber beams providing the satellite communication services to a first plurality of subscribers in a first subscriber beam coverage area using a first portion of the system bandwidth and the first gateway beam providing a communication link to a first gateway located within the service area using a second portion of the system bandwidth, the first subscriber beam coverage area being non overlapping with a coverage area of the first gateway beam; and

relaying communications between a second gateway beam and a second set of subscriber beams of the plurality of subscriber beams, the second set of subscriber beams providing the satellite communication services to a second plurality of subscribers in a second subscriber beam coverage area using a third portion of the system bandwidth and the second gateway beam providing a communication link to a second gateway located within the service area using a fourth portion of the system bandwidth, the second subscriber beam coverage area being non-overlapping with a coverage area of the second gateway beam,

wherein the first portion of the system bandwidth used by the first set of subscriber beams overlaps at least partially with the second portion of the system bandwidth used by the first gateway beam, and wherein the third portion of the system bandwidth used by the second set of subscriber beams overlaps at least partially with the fourth portion of the system bandwidth used by the second gateway beam.

2. The method of claim 1, wherein the first portion of the system bandwidth is greater than the third portion of the system bandwidth, and the second portion of the system bandwidth is greater than the fourth portion of the system bandwidth.

3. The method of claim 1, wherein the first portion of the system bandwidth is divided into a first plurality of colors and each of the first set of subscriber beams uses one of the first plurality of colors.

4. The method of claim 3, wherein the third portion of the system bandwidth is divided into a second plurality of colors and each of the second set of subscriber beams uses one of the second plurality of colors, and wherein each of the second plurality of colors has a different bandwidth than each of the first plurality of colors.

5. The method of claim 1, further comprising:

relaying communications between a third gateway beam and a third set of subscriber beams of the plurality of subscriber beams, the third set of subscriber beams providing the satellite communication services to a third plurality of subscribers in a third subscriber beam coverage area using a fifth portion of the system bandwidth and the third gateway beam providing a communication link to a third gateway located within the service area using a sixth portion of the system bandwidth, the third subscriber beam coverage area being non-overlapping with a coverage area of the third gateway beam,

wherein the fifth portion of the system bandwidth used by the third set of subscriber beams overlaps at least partially with the sixth portion of the system bandwidth used by the third gateway beam.

6. The method of claim 5, wherein the fifth portion of the system bandwidth is greater than the third portion of the system bandwidth and the first portion of the system bandwidth is greater than the fifth portion of the system bandwidth, and wherein the sixth portion of the system bandwidth is greater than the fourth portion of the system bandwidth and the second portion of the system bandwidth is greater than the sixth portion of the system bandwidth.

7. The method of claim 1, wherein the system bandwidth comprises one or more contiguous frequency bands.

8. The method of claim 1, wherein the system bandwidth comprises a plurality of non-contiguous frequency bands.

9. The method of claim 1, wherein the system bandwidth comprises multiple polarizations.

10. The method of claim 1, wherein the first portion of the system bandwidth comprises contiguous portions of the system bandwidth.

11. The method of claim 1, wherein the first portion of the system bandwidth comprises non-contiguous portions of the system bandwidth.

12. The method of claim 1, wherein the first portion of the system bandwidth comprises multiple polarizations.

13. The method of claim 1, wherein the first portion and the second portion comprise substantially all of the system bandwidth.

14. The method of claim 1, wherein the first portion of the system bandwidth and the third portion of the system bandwidth are a same portion of the system bandwidth.

15. The method of claim 1, wherein a first ratio between the first subscriber beam coverage area and the second subscriber beam coverage area is different than a second ratio between the first portion of the system bandwidth and the third portion of the system bandwidth.

16. The method of claim 1, wherein a first ratio between a number of the first set of subscriber beams and a number of the second set of subscriber beams is different than a second ratio between the first portion of the system bandwidth and the third portion of the system bandwidth.

17. A multi-beam satellite for providing satellite communication services to a service area via a plurality of subscriber beams over a system bandwidth, comprising:

a first relay element configured to relay communications between a first gateway beam and a first set of subscriber beams of the plurality of subscriber beams, the first set of subscriber beams providing the satellite communication services to a first plurality of subscribers in a first subscriber beam coverage area using a first portion of the system bandwidth and the first gateway beam providing a communication link to a first gateway located within the service area using a second portion of the system bandwidth, the first subscriber beam coverage area being non overlapping with a coverage area of the first gateway beam; and

a second relay element configured to relay communications between a second gateway beam and a second set of subscriber beams of the plurality of subscriber beams, the second set of subscriber beams providing the satellite communication services to a second plurality of subscribers in a second subscriber beam coverage area using a third portion of the system bandwidth and the second gateway beam providing a communication link to a second gateway located within the service area using a fourth portion of the system bandwidth, the second subscriber beam coverage area being non-overlapping with a coverage area of the second gateway beam,

wherein the first portion of the system bandwidth used by the first set of subscriber beams overlaps at least partially with the second portion of the system bandwidth used by the first gateway beam, and wherein the third portion of the system bandwidth used by the second set of subscriber beams overlaps at least partially with the fourth portion of the system bandwidth used by the second gateway beam.

18. The multi-beam satellite of claim 17, wherein the first portion of the system bandwidth is greater than the third portion of the system bandwidth, and the second portion of the system bandwidth is greater than the fourth portion of the system bandwidth.

19. The multi-beam satellite of claim 17, wherein the first portion of the system bandwidth is divided into a first plurality of colors and each of the first set of subscriber beams uses one of the first plurality of colors.

20. The multi-beam satellite of claim 19, wherein the third portion of the system bandwidth is divided into a second plurality of colors and each of the second set of subscriber beams uses one of the second plurality of colors, and wherein each of the second plurality of colors has a different bandwidth than each of the first plurality of colors.

21. The multi-beam satellite of claim 17, further comprising:

a third relay element configured to relay communications between a third gateway beam and a third set of subscriber beams of the plurality of subscriber beams, the third set of subscriber beams providing the satellite communication services to a third plurality of subscribers in a third subscriber beam coverage area using a fifth portion of the system bandwidth and the third gateway beam providing a communication link to a third gateway located within the service area using a sixth portion of the system bandwidth, the third subscriber beam coverage area being non-overlapping with a coverage area of the third gateway beam,

wherein the fifth portion of the system bandwidth used by the third set of subscriber beams overlaps at least partially with the sixth portion of the system bandwidth used by the third gateway beam.

22. The multi-beam satellite of claim 21, wherein the fifth portion of the system bandwidth is greater than the third portion of the system bandwidth and the first portion of the system bandwidth is greater than the fifth portion of the system bandwidth, and wherein the sixth portion of the system bandwidth is greater than the fourth portion of the system bandwidth and the second portion of the system bandwidth is greater than the sixth portion of the system bandwidth.

23. The multi-beam satellite of claim 17, wherein the system bandwidth comprises one or more contiguous frequency bands.

24. The multi-beam satellite of claim 17, wherein the system bandwidth comprises a plurality of non-contiguous frequency bands.

25. The multi-beam satellite of claim 17, wherein the system bandwidth comprises multiple polarizations.

26. The multi-beam satellite of claim 17, wherein the first portion of the system bandwidth comprises contiguous portions of the system bandwidth.

27. The multi-beam satellite of claim 17, wherein the first portion of the system bandwidth comprises non-contiguous portions of the system bandwidth.

28. The multi-beam satellite of claim 17, wherein the first portion of the system bandwidth comprises multiple polarizations.

29. The multi-beam satellite of claim 17, wherein the first portion and the second portion comprise substantially all of the system bandwidth.

30. The multi-beam satellite of claim 17, wherein the first portion of the system bandwidth and the third portion of the system bandwidth are a same portion of the system bandwidth.

31. The multi-beam satellite of claim 17, wherein a first ratio between the first subscriber beam coverage area and the second subscriber beam coverage area is different than a second ratio between the first portion of the system bandwidth and the third portion of the system bandwidth.

32. The multi-beam satellite of claim 17, wherein a first ratio between a number of the first set of subscriber beams and a number of the second set of subscriber beams is different than a second ratio between the first portion of the system bandwidth and the third portion of the system bandwidth.