公开(公告)号：US12184407B2

公开(公告)日：2024-12-31

申请号：US17991356

申请日：2022-11-21

Applicant: ADVA Optical Networking SE

Inventor： Michael Rabinovich ,  Andrew Sergeev ,  Joo Yeon Cho ,  Shihuan Zou

IPC: H04J3/06

Abstract: There is provided a technique of securing clock synchronization between master clock node (MCN) and client clock node (CCN). During a cycle of exchanging PTP messages between MCN and CCN, MCN generates an associated paired message for each PTP message generated thereby and informative of t1 or t4 timestamps provided by MCN and sends each paired message to a validation entity (VE) via a secured channel between MCN and VE. When PTP messages traverse transparent clock nodes (TCN) between MCN and CCN, each TCN generates a paired message for each version of PTP message updated thereby and sends each generated paired message to VE via a secured channel between respective TCN and VE. VE uses the received paired messages to provide a validation of the cycle, wherein synchronization-related task(s) (e.g. clock correction by the client clock node, etc.) are provided only subject to successful validation of the cycle by VE.