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US 12,647,193 B2Granted
Interference mitigation across multiple constellations in a satellite communication system
AssigneeHughes Network Systems, LLC
InventorsChannasandra Ravishankar, Xiaoling Huang, John E. Corrigan, III
Life of this patent
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Abstract
A satellite communication system which provides interference mitigation across multiple constellations. The satellite communication system provides interference mitigation when an in-line event occurs where a main lobe of a satellite of the first constellation and a main lobe of a user terminal communicating with the satellite of the second satellite constellation intersect sufficiently to cause significant interference on a common frequency band of the satellite and the user terminal.
Claims13
A satellite communication system comprising:
- a first satellite constellation with a plurality of satellites including a first satellite;
- a second satellite constellation including a second satellite;
- a user terminal;
- a network management server that detects and anticipates an in-line event to provide interference mitigation when a lobe of the first satellite and a lobe of the user terminal communicating with the second satellite intersect sufficiently to cause interference more than a threshold amount on a common frequency band of a link of the first satellite;
- when the interference is between a main lobe of the first satellite and a main lobe of the user terminal communicating with the second satellite, the interference mitigation includes resource consolidation that switches traffic to another band on the link;
- and
- when the interference comprises sidelobe degradation between a sidelobe of the first satellite and a side lobe of the user terminal, the interference mitigation includes adaptive beam nulling that suppresses beam response in a sidelobe in a direction of the in-line event;
- wherein the network management server detects and anticipates the in-line event from a relative position of the first satellite, the second satellite and the user terminal using data from a gateway position database that contains gateway positions and a satellite ephemeris database that contains a satellite ephemeris of the first satellite and a satellite ephemeris of the second satellite.
5 more elements
A method of communicating on a multi-satellite communication system comprising:
- providing a first satellite constellation with a plurality of satellites including a first satellite;
- providing a second satellite constellation with a second satellite;
- obtaining data to determine an in-line event including a relative position of the first satellite, the second satellite and a user terminal from a gateway position database that contains gateway positions and from a satellite ephemeris database that contains a satellite ephemeris of the first satellite and a satellite ephemeris of the second satellite;
- detecting and anticipating when an in-line event will occur to provide interference mitigation when a lobe of the first satellite and a lobe of a user terminal communicating with the second satellite intersect sufficiently to cause interference more than a threshold amount on a common frequency band of a link of the first satellite;
- when the interference is between a main lobe of the first satellite and a main lobe of the user terminal communicating with the second satellite, the interference mitigation includes resource consolidation that switches traffic to another band on the link;
- and
- when the interference comprises sidelobe degradation between a sidelobe of the first satellite and a side lobe of the user terminal, the interference mitigation includes adaptive beam nulling that suppresses beam response in a sidelobe in a direction of the in-line event;
- and
- mitigating interference when the in-line event occurs.
6 more elements
A satellite communication system comprising:
- a first satellite constellation with a plurality of satellites including a first satellite;
- a second satellite constellation with a second satellite;
- a network management server that detects and anticipates an in-line event to provide interference mitigation when a lobe of the first satellite and a lobe of a user terminal communicating with the second satellite intersect sufficiently to cause interference more than a threshold amount on a common frequency band of a link of the first satellite;
- when the interference is between a main lobe of the first satellite and a main lobe of the user terminal communicating with the second satellite, the interference mitigation includes resource consolidation that switches Ka band traffic to a V or Q band when resources on the V or Q band are available and mitigation of the interference comprises resource diversion that switches traffic to an alternate link when resources on the V or Q band are not available;
- when the interference comprises sidelobe degradation between a sidelobe of the first satellite and a side lobe of the user terminal, the interference mitigation comprises adaptive beam nulling that suppresses beam response in a sidelobe in a direction of the in-line event;
- wherein:
- the network management server mitigates interference when the in-line event occurs the network management server detects and anticipates the in-line event is from a relative position of the first satellite, the second satellite and a user terminal using data from a gateway position database that contains gateway positions and a satellite ephemeris database that contains a satellite ephemeris of the first satellite and a satellite ephemeris of the second satellite.
4 more elements
Dependencies are inferred from the claim text.