Method and apparatus for controlling delay in a device for transporting packets over optical transport network
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United States of America Patent
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Oct 15, 2019
Grant Date -
Dec 20, 2018
app pub date -
Jul 30, 2018
filing date -
Jun 6, 2017
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Abstract
A method and apparatus for controlling delay over a data path in a device for transporting Ethernet packets over an optical transport network. The device is configured to receive an incoming clock signal having a first frequency and an incoming data signal and to output an outgoing clock signal having a second frequency and an outgoing data signal. One or more delays over the data path in the device are measured in a predetermined measurement period. A phase adjustment amount is determined based on the one or more measured delays over the data path in the predetermined measurement period, and based on the determining phase adjustment amount, a phase of the outgoing clock signal is adjusted by a phase locked loop in such a way that the delay over the data path in the device is substantially equal to a fixed delay value.
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