Verfahren und Vorrichtung zur Bestimmung der Latenz oder der Länge eines Optischen Pfades, insbesondere einer Optischen Faser, einer Faseroptischen Übertragungsstrecke

Details

Veröffentlichungs-Nr.

EP3413481

Aktenzeichen

EP17175251

Anmeldetag

9. Juni 2017

Veröffentlichung

7. April 2021

Erteilung

7. April 2021

Rechtsraum

EP

IPC

H04B10/077H04L12/727

Abstract

The invention relates to a method for determining the latency or length of an optical path, especially an optical fiber, of a fiber-optic transmission link, the method comprising the steps of: starting a measurement cycle at a first point in time (T1), wherein, for carrying out the measurement, measurement bits or bit patterns are transmitted forth and back within an optical supervisory channel between a first and second end of the optical path (105), beginning at the first end at the first point in time (T1), for a predetermined number (N) of round trips; stopping the measurement cycle at a second point in time (T2) after having received a last measurement bit or bit pattern at the first end; determining, at the first end, the total round-trip delay (RTD i ; RTD cor,l , 1¤i¤N) of the optical path by evaluating a time information (T1, T2, T3, T4, T el ) available at the first end, wherein the time information (T1, T2, T3, T4, T el ) at least comprises the first and second points in time (T1, T2), and taking into account the predetermined number (N) of round-trips; and optionally calculating the length (L) of the optical path (105) by using the total round-trip delay (RTD i ; RTD cor,l ) and the group velocity v g characterizing the signal propagation along the optical path (105). Further, the invention relates to a device for implementing the method and to an optical transmission link (100) comprising such a device as well as to a method and an optical network (200) for routing signals, wherein latency constraints are fulfilled.

Anmelder

Firma

ADVA Optical Networking SE

Land

🇩🇪 Deutschland

Fachgebiete