Satellite system architecture for coverage areas of disparate demand

• US 9,654,203 B2
• Filed: 11/25/2015
• Issued: 05/16/2017
• 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
• Assistant Examiner(s): Esmaeilian, Majid
• Application Number:
  US14/952,455
• Publication Number:
  US 20160142130A1
• Time in Patent Office: 538 Days
• Field of Search: 370313
• 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 of allocating a system bandwidth in a satellite communication system comprising a multi-beam satellite providing satellite communication services to a service area, comprising:

determining a first bandwidth demand for one or more first subscriber beams serving a first subscriber beam coverage area and a second bandwidth demand for one or more second subscriber beams serving a second subscriber beam coverage area;

dividing the system bandwidth for the first subscriber beam coverage area into a first portion of the system bandwidth used by the one or more first subscriber beams and a second portion of the system bandwidth used by a first gateway beam associated with a first gateway located within the first subscriber beam coverage area; and

dividing the system bandwidth for the second subscriber beam coverage area into a third portion of the system bandwidth used by the one or more second subscriber beams and a fourth portion of the system bandwidth used by a second gateway beam associated with a second gateway located within the second subscriber beam coverage area,

wherein the first portion of the system bandwidth used by the one or more first subscriber beams and the third portion of the system bandwidth used by the one or more second subscriber beams are based on the first bandwidth demand compared to the second bandwidth demand,

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

2. The method of claim 1, further comprising:

dividing the first portion of the system bandwidth into a plurality of resource colors; and

associating each of the one or more first subscriber beams with a resource color of the plurality of resource colors.

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

4. The method of claim 1, further comprising:

determining a third bandwidth demand for one or more third subscriber beams serving a third subscriber beam coverage area; and

dividing the system bandwidth for the third subscriber beam coverage area into a fifth portion of the system bandwidth used by the one or more third subscriber beams and a sixth portion of the system bandwidth used by a third gateway beam associated with a third gateway located within the third subscriber beam coverage area,

wherein the fifth portion of the system bandwidth used by the one or more third subscriber beams is based at least in part on the first bandwidth demand or the second bandwidth demand compared to the third bandwidth demand.

5. The method of claim 1, wherein the second gateway serves at least one of the one or more first subscriber beams.

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

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

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

9. The method of claim 1, wherein the first bandwidth demand is determined based at least in part on empirical demand data of the first subscriber beam coverage area.

10. The method of claim 1, wherein the first bandwidth demand is determined based at least in part on demographic data of the first subscriber beam coverage area.

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

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

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

14. The method of claim 1, wherein the first subscriber beam coverage area is a different geographical area than the second subscriber beam coverage area.

15. A method of allocating a system bandwidth in a satellite communication system comprising a multi-beam satellite providing satellite communication services to a service area, comprising:

determining a first bandwidth demand for one or more first subscriber beams serving a first subscriber beam coverage area and a second bandwidth demand for one or more second subscriber beams serving a second subscriber beam coverage area;

dividing the system bandwidth for the first subscriber beam coverage area into a first portion of the system bandwidth used by the one or more first subscriber beams and a second portion of the system bandwidth used by a first gateway beam associated with a first gateway located within the first subscriber beam coverage area; and

dividing the system bandwidth for the second subscriber beam coverage area into a third portion of the system bandwidth used by the one or more second subscriber beams and a fourth portion of the system bandwidth used by a second gateway beam associated with a second gateway located within the second subscriber beam coverage area,

wherein a difference between the first portion of the system bandwidth used by the one or more first subscriber beams and the third portion of the system bandwidth used by the one or more second subscriber beams is based on a difference between the first bandwidth demand and the second bandwidth demand,

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

16. A satellite communication system providing satellite communication services to a service area via a system bandwidth, comprising:

a multi-beam satellite that provides the satellite communication services to a first subscriber beam coverage area via one or more first subscriber beams and to a second subscriber beam coverage area via one or more second subscriber beams; and

a network operations center configured to;

divide the system bandwidth for the first subscriber beam coverage area into a first portion of the system bandwidth used by the one or more first subscriber beams and a second portion of the system bandwidth used by a first gateway beam associated with a first gateway located within the first subscriber beam coverage area;

divide the system bandwidth for the second subscriber beam coverage area into a third portion of the system bandwidth used by the one or more second subscriber beams and a fourth portion of the system bandwidth used by a second gateway beam associated with a second gateway located within the second subscriber beam coverage area; and

determine the first portion of the system bandwidth used by the one or more first subscriber beams and the third portion of the system bandwidth used by the one or more second subscriber beams based on a first bandwidth demand associated with the one or more first subscriber beams compared to a second bandwidth demand associated with the one or more second subscriber beams,

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

17. A satellite communication system providing satellite communication services to a service area via a system bandwidth, comprising:

a multi-beam satellite that provides the satellite communication services to a first subscriber beam coverage area via one or more first subscriber beams and to a second subscriber beam coverage area via one or more second subscriber beams; and

a network operations center configured to;

divide the system bandwidth for the first subscriber beam coverage area into a first portion of the system bandwidth used by the one or more first subscriber beams and a second portion of the system bandwidth used by a first gateway beam associated with a first gateway located within the first subscriber beam coverage area;

divide the system bandwidth for the second subscriber beam coverage area into a third portion of the system bandwidth used by the one or more second subscriber beams and a fourth portion of the system bandwidth used by a second gateway beam associated with a second gateway located within the second subscriber beam coverage area; and

determine a difference between the first portion of the system bandwidth used by the one or more first subscriber beams and the third portion of the system bandwidth used by the one or more second subscriber beams based on a difference between a first bandwidth demand associated with the one or more first subscriber beams and a second bandwidth demand associated with the one or more second subscriber beams,

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