公开(公告)号：US10749727B2

公开(公告)日：2020-08-18

申请号：US16083717

申请日：2017-03-22

Applicant: Xieon Networks S.a.r.l.

Inventor： Danish Rafique ,  Stefano Calabro

IPC: H04L27/34 ,  H04B10/032 ,  H04J14/02 ,  H04L1/00 ,  H04L27/36 ,  H04B10/548 ,  H04B10/54 ,  H04B10/516

Abstract: Enclosed herewith is a method for protecting a link in an optical network configured for transmitting digital data employing a predetermined modulation format which comprises a number of symbols in a constellation diagram. A binary address is associated with each symbol. The modulation format allows for a constellation distortion, according to which the relative positions of constellation points in the constellation diagram are varied in a predetermined way by a predetermined degree. The method the steps of: A) partitioning the traffic in two or more priority classes, B) mapping higher priority traffic to predefined bit positions within the binary symbol addresses, C) evaluating the quality of a predetermined protection link, D) determining a degree of distortion such that a desired transmission quality for the transmission of the traffic of the highest priority class or classes via said predetermined protection link and a desired transmission quality for the full traffic via said given link are simultaneously ensured, and E) employing said distorted constellation diagram for transmission of digital data over said given link.