Facebook, Inc.

Nicolas E Stier-Moses

Birce Tezel

Zhang Liu

Jonathan Bryan McKay

Seungwon Jeong

Alexandra Filip

Anumeha Goel Dhanrajani

Julian Diego Mestre

Jack Marriott

Dingjie Wang

The present disclosure is directed toward methods, non-transitory computer-readable media, and systems for trajectory optimization in a high-altitude, long-endurance aircraft. For example, the systems described herein can generate an optimized flight plan for an aircraft during active flight of the aircraft by utilizing a greedy algorithm with buffering. In one or more embodiments, the systems described herein identify a plurality of possible states and select a predetermined number of the top possible states (based on energy change associated with transitioning to each possible state) at each incremental time period within a flight time window starting from an initial state to a plurality of possible states for a final incremental time period. Furthermore, in some embodiments, the systems described herein select a final state based on a final energy associated with the final state and determine a flight plan for the aircraft from the initial state to the selected final state.

Optimizing trajectory of unmanned aerial vehicles

In one embodiment, a method includes determining a reliability score for multiple message aggregators and calculating a rank score for each of the message aggregators. The rank score may be based on a price and the reliability score of the corresponding message aggregator. The method further includes identifying a message type for a queued message. Upon identifying the message type as corresponding to a first message type, the method further includes selecting a first message aggregator of the plurality of message aggregators based on the reliability scores, and upon identifying the message type as corresponding to a second message type, selecting a second message aggregator of the plurality of message aggregators based on the rank scores. Finally, the method includes sending the queued message through the selected message aggregator.

Messaging aggregator selection based on message priority

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Palo Alto, CA, United States of America

Nicolas E Stier-Moses