IL320301A - Mobile satellite beam collision avoidance - Google Patents

Mobile satellite beam collision avoidance

Info

Publication number
IL320301A
IL320301A IL320301A IL32030125A IL320301A IL 320301 A IL320301 A IL 320301A IL 320301 A IL320301 A IL 320301A IL 32030125 A IL32030125 A IL 32030125A IL 320301 A IL320301 A IL 320301A
Authority
IL
Israel
Prior art keywords
beamformed spot
resource element
beamformed
spot beams
spot beam
Prior art date
Application number
IL320301A
Other languages
Hebrew (he)
Original Assignee
Viasat Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Viasat Inc filed Critical Viasat Inc
Publication of IL320301A publication Critical patent/IL320301A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18515—Transmission equipment in satellites or space-based relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/2041—Spot beam multiple access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Electromagnetism (AREA)
  • Radio Relay Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (56)

1. A method, comprising: providing a communication service to a first mobile terminal (120) and a second mobile terminal (120) via a first beamformed spot beam (150) and a second beamformed spot beam (150) of a satellite communication system (100), wherein the first and second mobile terminals (120) are respectively assigned to the first and second beamformed spot beams (150), wherein the first and second beamformed spot beam (150) are respectively associated with first beamforming weights and second beamforming weights, and wherein providing the communication service comprises: assigning, based at least in part on an interference metric between the first and second beamformed spot beams (150) failing to satisfy a threshold value, the first and second beamformed spot beams (150) to a same first resource element of a set of resource elements, wherein each resource element in the set of resource elements comprises time resources, frequency resources, and polarization resources, and wherein the first resource element comprises first time resources, first frequency resources, and first polarization resources; adjusting, through adjustment of the first beamforming weights and the second beamforming weights, respective coverage areas (160) of the first and second beamformed spot beams (150) such that the first and second beamformed spot beams (150) track movement of the first and second mobile terminals (120) within a coverage area (155) of the satellite communication system (100); and reassigning, based at least in part on adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150), and on the interference metric between the first and second beamformed spot beams (150) satisfying the threshold value, the second beamformed spot beam (150) to a second resource element of the set of resource elements that is different than the first resource element due to second time resources of the second resource element that at least partially differ from the first time resources of the first resource element, second frequency resources of the second resource element that at least partially differ from the first frequency resources of the first resource element, second polarization resources of the second resource element that at least partially differ from the first polarization resources of the first resource element, or any combination thereof, wherein the interference metric is based on one or more of a measured interference between the first and second beamformed spot beams (150), an estimated interference between the first and second beamformed spot beams (150), a correlation between channels of the first and second mobile terminals (120), or a distance between the first and second mobile terminals (120).
2. The method of claim 1, wherein providing the communication service further comprises: reassigning, after reassigning the second beamformed spot beam (150) to the second resource element and based on adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150), and based on the interference metric between the first and second beamformed spot beams (150) satisfying a second threshold value, the second beamformed spot beam (150) back to the first resource element.
3. The method of claim 2, wherein the second threshold value equals the threshold value.
4. The method of any one of claims 1 and 2, wherein providing the communication service further comprises: maintaining the assignment of the first beamformed spot beam (150) to the first resource element after reassigning the second beamformed spot beam (150) to the second resource element.
5. A method, comprising: providing a communication service to a first mobile terminal (120) and a second mobile terminal (120) via a first beamformed spot beam (150) and a second beamformed spot beam (150) of a satellite communication system (100), wherein the first and second mobile terminals (120) are respectively assigned to the first and second beamformed spot beams (150), wherein providing the communication service comprises: assigning the first and second beamformed spot beams (150) to a same first resource element; adjusting respective coverage areas (160) of the first and second beamformed spot beams (150) to track movement of the first and second mobile terminals (120) within a coverage area (155) of the satellite communication system (100); and reassigning, based on adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150), and on an interference metric between the first and second beamformed spot beams (150) satisfying a threshold value, the second beamformed spot beam (150) to a second resource element that is different than the first resource element, wherein the threshold value is based on respective beam widths of the first and second beamformed spot beams (150).
6. The method of any one of claims 1, and 2 through 4, wherein reassigning the second beamformed spot beam (150) to the second resource element comprises: changing the respective resource element of the second beamformed spot beam (150) to be orthogonal to the first resource element.
7. The method of claim 6, wherein changing the second resource element to be orthogonal to the first resource element comprises: changing at least one of a frequency of the second beamformed spot beam (150), a time slot assigned to the second beamformed spot beam (150), a polarization assigned to the second beamformed spot beam (150), or one or more codes assigned to the second beamformed spot beam (150).
8. The method of any one of claims 1, 2 through 4 and 6 through 7, wherein adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150) is based on measurements of signals communicated with the first and second mobile terminals (120).
9. The method of any one of claims 1, 2 through 4 and 6 through 8, wherein providing the communication service further comprises: applying beamforming coefficients to component signals associated with a plurality of antenna elements (615) of the satellite communication system (100).
10. The method of claim 9, wherein providing the communication service further comprises: receiving the beamforming coefficients from one or more ground stations (130) before applying the beamforming coefficients to the component signals.
11. The method of any one of claims 9 or 10, wherein adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150) comprises: adjusting the beamforming coefficients to move the respective coverage areas (160) of the first and second beamformed spot beams (150) to reflect the movement of the first and second mobile terminals (120).
12. The method of claim 11, wherein providing the communication service further comprises: receiving the beamforming coefficients from one or more ground stations (130), wherein adjusting the beamforming coefficients comprises applying the adjusted beamforming coefficients to the component signals.
13. The method of any one of claims 1, 2 through 4 and 6 through 12, wherein the first and second resource elements each comprises a frequency and a time slot.
14. The method of any one of claims 1, 2 through 4, and 6 through 13, wherein the first and second resource elements each comprises a polarization.
15. A system for satellite communications, comprising: one or more satellites (105); and a beam manager (175) configured to: provide a communication service to a first mobile terminal (120) and a second mobile terminal (120) via a first beamformed spot beam (150) and a second beamformed spot beam (150) of the one or more satellites (105), wherein the first and second mobile terminals (120) are respectively assigned to the first and second beamformed spot beams (150), wherein the first and second beamformed spot beam (150) are associated with first beamforming weights and second beamforming weights, respectively, and wherein to provide the communication service, the beam manager (175) is configured to: assign, based at least in part on an interference metric between the first and second beamformed spot beams (150) failing to satisfy a threshold value, the first and second beamformed spot beams (150) to a same first resource element of a set of resource elements, wherein each resource element in the set of resource elements comprises time resources, frequency resources, and polarization resources, and wherein the first resource element comprises first time resources, first frequency resources, and first polarization resources; adjust, through adjustment of the first beamforming weights and the second beamforming weights, respective coverage areas (160) of the first and second beamformed spot beams (150) such that the first and second beamformed spot beams (150) track movement of the first and second mobile terminals (120) within a coverage area (155) of the satellite communication system (100); and reassign, based at least in part on adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150), and on the interference metric between the first and second beamformed spot beams (150) satisfying the threshold value, the second beamformed spot beam (150) to a second resource element (250) of the set of resource elements that is different than the first resource element (250) due to second time resources of the second resource element that at least partially differ from the first time resources of the first resource element, second frequency resources of the second resource element that at least partially differ from the first frequency resources of the first resource element, second polarization resources of the second resource element that at least partially differ from the first polarization resources of the first resource element, or any combination thereof, wherein the interference metric comprises one or more of a measured interference between the first and second beamformed spot beams (150), an estimated interference between the first and second beamformed spot beams (150), a correlation between channels of the first and second beamformed spot beams (150), or a distance between the first and second mobile terminals (120).
16. The system of claim 15, further comprising: a ground station (130) configured to communicate with the one or more satellites (105) via one or more satellite beams (132).
17. The system of claim 16, wherein the ground station (130) comprises a user terminal (UT) or a gateway.
18. The system of any one of claims 15 and 16 through 17, wherein to provide the communication service, the beam manager (175) is further configured to: reassign, after reassigning the second beamformed spot beam (150) to the second resource element and based on adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150), and based on the interference metric between the first and second beamformed spot beams (150) satisfying a second threshold value, the second beamformed spot beam (150) back to the first resource element.
19. The system of claim 18, wherein the second threshold value equals the threshold value.
20. The system of any one of claims 15 and 16 through 19, wherein to provide the communication service, the beam manager (175) is further configured to: maintain the assignment of the first beamformed spot beam (150) to the first resource element after reassigning the second beamformed spot beam (150) to the second resource element.
21. A system for satellite communications, comprising: one or more satellites (105); and a beam manager (175) configured to: provide a communication service to a first mobile terminal (120) and a second mobile terminal (120) via a first beamformed spot beam (150) and a second beamformed spot beam (150) of the one or more satellites (105), wherein the first and second mobile terminals (120) are respectively assigned to the first and second beamformed spot beams (150), wherein to provide the communication service, the beam manager (175) is configured to: assign the first and second beamformed spot beams (150) to a same first resource element; adjust respective coverage areas (160) of the first and second beamformed spot beams (150) to track movement of the first and second mobile terminals (120) within a coverage area (155) of the satellite communication system (100); and reassign, based on adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150), and on an interference metric between the first and second beamformed spot beams (150) satisfying a threshold value, the second beamformed spot beam (150) to a second resource element (250) that is different than the first resource element (250), wherein the threshold value is based on respective beam widths of the first and second beamformed spot beams (150).
22. The system of any one of claims 15, and 16 through 20, wherein to reassign the second beamformed spot beam (150) to the second resource element, the beam manager (175) is further configured to: change the respective resource element of the second beamformed spot beam (150) to be orthogonal to the first resource element.
23. The system of claim 22, wherein to change the second resource element to be orthogonal to the first resource element, the beam manager (175) is further configured to: change at least one of: a frequency of the second beamformed spot beam (150), a time slot assigned to the second beamformed spot beam (150), a polarization assigned to the second beamformed spot beam (150), or one or more codes assigned to the second beamformed spot beam (150).
24. The system of any one of claims 15, 16 through 20, and 22 through 23, wherein adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150) is based on measurements of signals communicated with the first and second mobile terminals (120).
25. The system of any one of claims 15, 16 through 20, and 22 through 24, wherein to provide the communication service, the beam manager (175) is further configured to: apply beamforming coefficients to component signals associated with a plurality of antenna elements (615) of the one or more satellites (105).
26. The system of claim 25, wherein to provide the communication service, the beam manager (175) is further configured to: receive the beamforming coefficients from one or more ground stations (130) before applying the beamforming coefficients to the component signals.
27. The system of any one of claims 25 or 26, wherein to adjust the respective coverage areas (160) of the first and second beamformed spot beams (150), the beam manager (175) is further configured to: adjust the beamforming coefficients to move the respective coverage areas (160) of the first and second beamformed spot beams (150) to reflect the movement of the first and second mobile terminals (120).
28. The system of claim 27, wherein to provide the communication service, the beam manager (175) is further configured to: receive the beamforming coefficients from one or more ground stations (130), wherein to adjust the beamforming coefficients, the beam manager (175) is further configured to: apply the adjusted beamforming coefficients to the component signals.
29. The system of any one of claims 15, 16 through 20, and 22 through 28, wherein the first and second resource elements each comprises a frequency and a time slot.
30. The system of any one of claims 15, 16 through 20, and 22 through 29, wherein the first and second resource elements each comprises a polarization.
31. The method of claim 5, wherein providing the communication service further comprises: reassigning, after reassigning the second beamformed spot beam (150) to the second resource element and based on adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150), and based on the interference metric between the first and second beamformed spot beams (150) satisfying a second threshold value, the second beamformed spot beam (150) back to the first resource element.
32. The method of claim 31, wherein the second threshold value equals the threshold value.
33. The method of any one of claims 5 and 31 through 32, wherein providing the communication service further comprises: maintaining the assignment of the first beamformed spot beam (150) to the first resource element after reassigning the second beamformed spot beam (150) to the second resource element.
34. The method of any one of claims 5 and 31 through 33, wherein reassigning the second beamformed spot beam (150) to the second resource element comprises: changing the respective resource element of the second beamformed spot beam (150) to be orthogonal to the first resource element.
35. The method of claim 34, wherein changing the second resource element to be orthogonal to the first resource element comprises: changing at least one of a frequency of the second beamformed spot beam (150), a time slot assigned to the second beamformed spot beam (150), a polarization assigned to the second beamformed spot beam (150), or one or more codes assigned to the second beamformed spot beam (150).
36. The method of any one of claims 5 and 31 through 35, wherein adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150) is based on measurements of signals communicated with the first and second mobile terminals (120).
37. The method of any one of claims 5 and 31 through 36, wherein providing the communication service further comprises: applying beamforming coefficients to component signals associated with a plurality of antenna elements (615) of the satellite communication system (100).
38. The method of claim 37, wherein providing the communication service further comprises: receiving the beamforming coefficients from one or more ground stations (130) before applying the beamforming coefficients to the component signals.
39. The method of any one of claims 37 or 38, wherein adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150) comprises: adjusting the beamforming coefficients to move the respective coverage areas (160) of the first and second beamformed spot beams (150) to reflect the movement of the first and second mobile terminals (120).
40. The method of claim 39, wherein providing the communication service further comprises: receiving the beamforming coefficients from one or more ground stations (130), wherein adjusting the beamforming coefficients comprises applying the adjusted beamforming coefficients to the component signals.
41. The method of any one of claims 5 and 31 through 40, wherein the first and second resource elements each comprises a frequency and a time slot.
42. The method of any one of claims 5 and 31 through 41, wherein the first and second resource elements each comprises a polarization.
43. The system of claim 21, further comprising: a ground station (130) configured to communicate with the one or more satellites (105) via one or more satellite beams (132).
44. The system of claim 43, wherein the ground station (130) comprises a user terminal (UT) or a gateway.
45. The system of any one of claims 21 and 43 through 44, wherein to provide the communication service, the beam manager (175) is further configured to: reassign, after reassigning the second beamformed spot beam (150) to the second resource element and based on adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150), and based on the interference metric between the first and second beamformed spot beams (150) satisfying a second threshold value, the second beamformed spot beam (150) back to the first resource element.
46. The system of claim 45, wherein the second threshold value equals the threshold value.
47. The system of any one of claims 21 and 43 through 46, wherein to provide the communication service, the beam manager (175) is further configured to: maintain the assignment of the first beamformed spot beam (150) to the first resource element after reassigning the second beamformed spot beam (150) to the second resource element.
48. The system of any one of claims 21 and 43 through 47, wherein to reassign the second beamformed spot beam (150) to the second resource element, the beam manager (175) is further configured to: change the respective resource element of the second beamformed spot beam (150) to be orthogonal to the first resource element.
49. The system of claim 48, wherein to change the second resource element to be orthogonal to the first resource element, the beam manager (175) is further configured to: change at least one of: a frequency of the second beamformed spot beam (150), a time slot assigned to the second beamformed spot beam (150), a polarization assigned to the second beamformed spot beam (150), or one or more codes assigned to the second beamformed spot beam (150).
50. The system of any one of claims 21 and 43 through 49, wherein adjusting the respective coverage areas (160) of the first and second beamformed spot beams (150) is based on measurements of signals communicated with the first and second mobile terminals (120).
51. The system of any one of claims 21 and 43 through 50, wherein to provide the communication service, the beam manager (175) is further configured to: apply beamforming coefficients to component signals associated with a plurality of antenna elements (615) of the one or more satellites (105).
52. The system of claim 51, wherein to provide the communication service, the beam manager (175) is further configured to: receive the beamforming coefficients from one or more ground stations (130) before applying the beamforming coefficients to the component signals.
53. The system of any one of claims 51 or 52, wherein to adjust the respective coverage areas (160) of the first and second beamformed spot beams (150), the beam manager (175) is further configured to: adjust the beamforming coefficients to move the respective coverage areas (160) of the first and second beamformed spot beams (150) to reflect the movement of the first and second mobile terminals (120).
54. The system of claim 53, wherein to provide the communication service, the beam manager (175) is further configured to: receive the beamforming coefficients from one or more ground stations (130), wherein to adjust the beamforming coefficients, the beam manager (175) is further configured to: apply the adjusted beamforming coefficients to the component signals.
55. The system of any one of claims 21 and 43 through 54, wherein the first and second resource elements each comprises a frequency and a time slot.
56. The system of any one of claims 21 and 43 through 55, wherein the first and second resource elements each comprises a polarization.
IL320301A 2022-10-18 2022-10-18 Mobile satellite beam collision avoidance IL320301A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2022/047061 WO2024085865A1 (en) 2022-10-18 2022-10-18 Mobile satellite beam deconfliction

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IL320301A true IL320301A (en) 2025-06-01

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EP (1) EP4606035A1 (en)
KR (1) KR20250087632A (en)
CN (1) CN120604471A (en)
AU (1) AU2022482874A1 (en)
IL (1) IL320301A (en)
WO (1) WO2024085865A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017211430A1 (en) * 2016-06-10 2017-12-14 European Space Agency Interference-resilient flexible techniques for payload resource allocation in broadband satellites
CN108259111B (en) * 2016-12-29 2019-07-19 华为技术有限公司 A kind of disturbance coordination method and high altitude platform radio station, base station
US10277310B2 (en) * 2017-02-15 2019-04-30 Viasat, Inc. Dynamic spatial allocation of satellite capacity based on mobile vessel load forecasting
IL300645B2 (en) * 2020-09-04 2025-12-01 Viasat Inc Beam steering using distributed antenna arrays

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WO2024085865A1 (en) 2024-04-25
CN120604471A (en) 2025-09-05
EP4606035A1 (en) 2025-08-27
KR20250087632A (en) 2025-06-16
AU2022482874A1 (en) 2025-06-26

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