Time synchronization in a satellite network
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United States of America Patent
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Jan 10, 2017
Grant Date -
Jul 30, 2015
app pub date -
Dec 12, 2014
filing date -
Dec 13, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A remote device comprising a remote clock oscillator with relatively low precision, a receiver that receives time packets transmitted periodically from the hub device via the satellite, each time packet including a hub real time clock (RTC) value and a hub network clock reference (NCR) value, a remote RTC counter that represents a remote RTC value at the remote, a remote NCR counter that represents a remote NCR value at the remote, and processing circuitry that extracts the hub RTC value and the hub NCR value from a current time packet, compares contents of the current time packet with contents of a previously received time packet, and adjusts the remote RTC counter based on the result of the comparison to synchronize the remote RTC value at the remote with the hub RTC value.
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