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NANOSECOND ACCURACY UNDER PRECISION TIME PROTOCOL FOR ETHERNET BY USING HIGH ACCURACY TIMESTAMP ASSIST DEVICE
NANOSECOND ACCURACY UNDER PRECISION TIME PROTOCOL FOR ETHERNET BY USING HIGH ACCURACY TIMESTAMP ASSIST DEVICE
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机译:使用高精度时间戳辅助设备的以太网精确时间协议下的纳米精度
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摘要
In methods, systems, and devices, master and slave node timestamp synchronization units identify a node start frame delimiter of a time protocol message on transmission medium by matching patterns in the time protocol message to known start frame delimiter patterns. Master and slave node processors of such timestamp synchronization units capture a corresponding node clock time at which the node start frame delimiter is identified by referring to a corresponding node clock signal while each is identifying the node start frame delimiter. The master and slave node processors perform compensation of the node clock time by making adjustments to the node clock time for known time latency. The master and slave node timestamp synchronization units then output the node clock time as timestamps to corresponding timestamp units.
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