METHOD AND SYSTEM FOR SUPERVISING POINT TO MULTIPOINT PASSIVE OPTICAL NETWORKS BASED ON REFLECTOMETRY SYSTEMS

摘要

A method and a system for physical layer monitoring in Passive Optical Networks. The method comprises: - injecting a monitoring light signal at an input of a Passive Optical Network, or PON, to circulate there through; - reflecting back, optical reflectors provided at different points of said PON, at least part of said monitoring light signal, in the form of respective reflected light signals; and - analysing said received reflected light signals to perform a physical layer monitoring of the PON; wherein the method is characterised in that it further comprises, in order to perform said supervision simultaneously to the normal operation of the PON based on the injection of a working light signal: a) diverting said monitoring light signal towards an intermediate conditioning unit; and b) at least splitting, at said intermediate conditioning unit, said diverted monitoring light signal, and sending to each branch of said PON at least part of one of the resulting signals of said splitting. The system is arranged for implementing the method of the present invention.