Patent · US Active

Network unit and method for monitoring a fiber line

US9985725B2 · kind B2 · utility

0Cited by

14References

19Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Gemma Vall-Llosera · Järfälla, SE
Boris Dortschy · Åtvidaberg, SE
Patryk Urban · Ljungby, SE

Key dates

Filing date	Sep 24, 2013
Grant date	May 29, 2018
Priority date	—
Expiry date	Sep 24, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04J14/0283
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

Embodiments herein relate to a method in a network unit for monitoring a fiber line between a radio base station and a radio head in a Fiber to the Radio Head communications network. The Fiber to the Radio Head communications network comprises a ring architecture or a tree architecture of fiber, with Subcarrier Multiplexing, SCM, downstream transmissions and Wavelength Division Multiplexing, WDM, upstream transmissions. The monitoring comprises that the network unit detects an indication of a fault along the fiber line based on monitoring power. The network unit initiates, in response to detect the indication, an Optical×Domain Reflectometry, O×DR, measurement over the fiber line. Additionally, the network unit analyses a trace from the O×DR measurement for localizing the fault or for deciding that the indicated fault is not a fault along the fiber line.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.