Improving Holdover of a PTP Network in BTCA using Frequency Support
AssigneeCiena Corporation
InventorsArshad Saleem A, Ankur Saxena, Sharad Srivastava
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Abstract
Systems and methods for enhancing time holdover in a Precision Time Protocol (PTP) network involve leveraging the best available frequency support while disqualifying time input from a degraded PTP clock. A method includes steps of entering holdover in Precision Time Protocol (PTP) indicating a degraded time synchronization state; determining parameters for a Best Time Clock Algorithm (BTCA), the parameters including a Frequency Traceable flag; providing the parameters to other nodes in the network; and implementing the BTCA including consideration of the Frequency Traceable flag, to select a Best Time Transmitter (BTT) while in the holdover.
Claims20
A network element in a network comprising circuitry configured to:
- enter holdover in Precision Time Protocol (PTP) indicating a degraded time synchronization state,
- determine parameters for a Best Time Clock Algorithm (BTCA), the parameters including a Frequency Traceable flag,
- provide the parameters to other nodes in the network, and
- implement the BTCA including consideration of the Frequency Traceable flag, to select a Best Time Transmitter (BTT) while in the holdover.
A method comprising steps of:
- entering holdover in Precision Time Protocol (PTP) indicating a degraded time synchronization state;
- determining parameters for a Best Time Clock Algorithm (BTCA), the parameters including a Frequency Traceable flag;
- providing the parameters to other nodes in the network;
- and
- implementing the BTCA including consideration of the Frequency Traceable flag, to select a Best Time Transmitter (BTT) while in the holdover.
Dependencies are inferred from the claim text.