Amazon Technologies, Inc.

Srikar Rajamani

Deepak

Bulin Zhang

Kavitha Kamarthy

Sharanya Subramanian

A satellite constellation provides communication between user terminals (UTs) and ground stations that connect to other networks, such as the Internet. Satellites transmit beacon transmissions to particular areas on Earth as particular times. The beacon transmissions include information used by a UT to use a random access channel (RACH) uplink to request communication. Responsive to the request, encryption is established between the satellite and the UT. The satellite may then allocate uplink resources, send data to the UT on a downlink, and so forth. The UT receives additional data about future handovers to other satellites. Based on previously received data the UT may quickly re-establish communication with a satellite after an interruption, such as due to a power outage at the UT. If the previously received data has expired, the UT may again use a beacon transmission.

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REDMOND, WA, United States of America

Srikar Rajamani