Systems and methods for transporting a clock signal over a network
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United States of America Patent
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Nov 21, 2017
Grant Date -
Jul 10, 2014
app pub date -
Jan 8, 2014
filing date -
Jan 8, 2013
priority date (Note) -
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Abstract
According to some embodiments, a master device sends synchronization packets to one or more slave devices, and does so periodically based on a master clock signal having a master clock frequency. At each of the slave devices, an algorithm estimates the master clock frequency based on the timing of synchronization packet arrivals the slave device. The algorithm may estimate the master clock frequency using both the currently-observed timing of synchronization packet arrivals and the history of previous synchronization packet arrivals (e.g., previously-observed timing of synchronization packet arrivals). Based on the estimated master clock frequency, each of the one or more slave devices can update the frequency of their respective slave clock signal (e.g., using a frequency offset) to match that of the estimated master clock frequency.
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