Compensation of PTP network asymmetry for APTS clocks during PTP disruption

An Assisted Partial Timing Support (APTS) node in a network configured to compensate Precision Time Protocol (PTP) network asymmetry during PTP disruptions, the APTS node comprising circuitry configured to:

• while a local time reference is connected to the APTS node and while PTP is operational, determine a current network path to a PTP Grandmaster connected to the APTS node, determine asymmetry between the APTS node and the PTP Grandmaster, and store the determined asymmetry based on the current network path, and
• during a failure of the local time reference and subsequent to recovery of a PTP disruption between the APTS node and the PTP Grandmaster, utilize a corresponding stored determined asymmetry on a recovered path between the APTS node and either the PTP Grandmaster or another PTP Grandmaster.

A non-transitory computer-readable medium comprising instructions for compensating Precision Time Protocol (PTP) network asymmetry for Assisted Partial Timing Support (APTS) clocks during PTP disruptions, the instructions are implemented at an APTS node in a network and, when executed, the instructions cause circuitry to perform steps of:

• while a local time reference is connected to the APTS node and while PTP is operational, determining a current network path to a PTP Grandmaster connected to the APTS node, determining asymmetry between the APTS node and the PTP Grandmaster, and storing the determined asymmetry based on the current network path;
• and
• during a failure of the local time reference and subsequent to recovery of a PTP disruption between the APTS node and the PTP Grandmaster, utilizing a corresponding stored determined asymmetry on a recovered path between the APTS node and either the PTP Grandmaster or another PTP Grandmaster.