Invention Grant
- Patent Title: Synchronization timing loop detection systems and methods
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Application No.: US13363684Application Date: 2012-02-01
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Publication No.: US09762340B1Publication Date: 2017-09-12
- Inventor: Mark J. Derrico
- Applicant: Mark J. Derrico
- Applicant Address: US MD Hanover
- Assignee: Ciena Corporation
- Current Assignee: Ciena Corporation
- Current Assignee Address: US MD Hanover
- Agency: Clements Bernard Walker PLLC
- Agent Christopher L. Bernard; Lawrence A. Baratta, Jr.
- Main IPC: H04B17/02
- IPC: H04B17/02 ; H04J3/02 ; H04J3/06

Abstract:
A synchronization timing loop detection method includes monitoring an active timing reference for a flapping event at a network element, incrementing a counter for each detected flapping event, determining if the counter exceeds a threshold over a predetermined time period, and, if the counter exceeds the threshold, declaring a possible timing loop on the active timing reference. The flapping event can include the active timing reference being active followed by inactive due to synchronization status messaging and one of a logical and physical timing loop on the active timing reference. A synchronization timing loop detection system and a network element for synchronization timing loop detection for the synchronization timing loop detection method are also disclosed.
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