Apparatus and method for efficient handover for low earth orbit (LEO) satellite systems

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United States of America Patent

PATENT NO 10104594
APP PUB NO 20170374596A1
SERIAL NO

15687858

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Abstract

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A method for satellite to satellite handover of a user terminal in a satellite communications network is provided. The UT receives an initial handover message, from a RAN node, including a target frequency for receiving downlink transmissions from the RAN node via a target satellite and a timing correction, and reconfigures its receiver for receipt of the downlink transmissions via the target frequency. The UT decodes the downlink transmissions to determine allocations for a PRACH of the target satellite provided by the downlink transmissions, and transmits a reply handover message to the RAN node, via the PRACH channel, using the timing correction. The UT receives a flow assignment message from the RAN. The UT reactivates hand-over data flows for the target satellite, and transmits a channel configuration complete message to the RAN node, via the PRACH channel, using the timing correction.

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Patent Owner(s)

  • HUGHES NETWORK SYSTEMS, LLC

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Arur, Deepak McLean, US 21 282
Benammar, Nassir Rockville, US 26 234
Ravishankar, Channasandra Clarksburg, US 90 981
Vasavada, Yash Gandhinagar, IN 16 284

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