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US 10,257,655 B2Granted
Contact graph generation for mobile and ground station nodes
AssigneeRaytheon Company
InventorMac Allen Cody
Life of this patent
Estimating the term…
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AssigneeRaytheon Company
InventorMac Allen Cody
Estimating the term…
A method for generating contact graphs for delay/disruption tolerant networking for a constellation of network nodes (e.g., satellites in low earth orbit, terrestrial sensors, and ground stations). A contact graph indicates the availability and data rates for communications links between spacecraft and ground stations. The links may be intermittent due to orbital dynamics and the earth's rotation, and may be line-of-sight or relayed. The method predicts the future locations of satellite nodes in the Earth Centered inertial reference frame, and converts the locations of terrestrial nodes by converting their coordinates from the Earth Centered Earth Fixed reference frame. The method also determines whether line-of-sight links are possible, and estimates the closing velocity between network nodes to estimate signal Doppler shift. Contact graph routing determines the links used to most effectively move data over the network. Output data files may be directly used by Interplanetary Overlay Network administration software.
An apparatus configured to generate contact graph data indicating availability of line-of-sight communications links between nodes in a communications network, the apparatus comprising:
A method for generating contact graph data indicating availability of line-of-sight communications links between nodes in a communications network, comprising:
A non-transitory computer-readable storage medium that stores instructions for execution by at least one processor to operations for generation of contact graph data indicating availability of line-of-sight communications links between nodes in a communications network, the operations to configure processing circuitry to:
Dependencies are inferred from the claim text.