Method for monitoring a passive optical network using monitoring units

US8467677B2 · kind B2 · utility

Assignee

• Alcatel Lucent · FR

Inventors

• Michael Straub · Longmont, US
• Harald Schmuck · Schwieberdingen, DE
• Lothar Jentsch · Fredersdorf, DE
• Jörg Hehmann · Nürnberg, DE

Key dates

• Filing date: Jan 27, 2009
• Grant date: Jun 18, 2013
• Expiry date: Nov 26, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02D30/50
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A method for monitoring a passive optical network (1), PON, having a tree-like structure with a main line (3) and at least two branches (6.1 to 6.3), comprising: transmitting a wake-up signal (10) from the main line (3) to at least two monitoring units (DPM1 to DPM3) arranged in the at least two branches (6.1 to 6.3), in each of the monitoring units (DPM1 to DPM3), detecting the wake-up signal (10) and transmitting a response signal (A, B, C) back to the main line (3), each of the monitoring units (DPM1 to DPM3) generating a pre-defined time delay (ΔtA to ΔtC) between the detection of the wake-up signal (10) and the start of the transmission of the response signal (A, B, C), and receiving the response signals (A, B, C) at the main line (3), the receiving times (R1 to R3) of the response signals (A, B, C) being different from each other, the difference between the receiving times (R1 to R3) being adjusted by the pre-defined time delays (ΔtA to ΔtC) of the monitoring units (DPM1 to DPM3).