Method and apparatus for automatically identifying system...

H - Electricity – 04 – B

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H04B 10/08 (2006.01)

Patent

CA 2334132

A method is provided for automatically identifying a system fault in an optical communication system that includes first and second transmission paths for supporting bidirectional communication. In accordance with the method, measurements are made of a plurality of optical gain values respectively generated by a plurality of optical amplifier units disposed in respective loop back paths extending through the first and second transmission paths of the optical communication system. A gain signature is obtained by subtracting a plurality of baseline values from the plurality of optical gain values. Directional state changes are located along the gain signature to identify a plurality of directional states. Each of the directional states is assigned a pre-established state such that the gain signature is represented by a sequence of pre-established states. The sequence of pre-established states of said gain signature is compared to a plurality of predetermined sequences of pre-established states. The predetermined sequences each correspond to a known fault condition. At least one exact match is identified between the sequence of pre-established states of the gain signature and the pre-determined sequences. The matching predetermined sequence identifies the system fault that gives rise to the gain signature.

L'invention concerne un procédé permettant l'identification automatique d'une panne d'un système dans un système de communication optique comprenant des premier et second trajets de transmission destinés à prendre en charge une communication bidirectionnelle. Le procédé consiste à mesurer une pluralité de valeurs de gain optique générées par une pluralité d'unités d'amplification de fibre optique disposées dans des trajets de bouclage parcourant les premier et second trajets de transmission du système de communication optique. Une signature de gain est obtenue par soustraction d'une pluralité de valeurs de base de la pluralité de valeurs de gain optique. Les modifications de l'état directionnel sont appliquées le long de la signature de gain pour identifier une pluralité d'états directionnels. A chaque état est affecté un état prédéfini de telle sorte que la signature de gain soit représentée par une séquence d'états prédéfinis. Cette séquence est comparée à une pluralité de séquences prédéterminées d'états prédéfinis, chacune correspondant à une panne connue. Au moins une correspondance exacte est identifiée entre la séquence d'états prédéfinis de la signature de gain et les séquences prédéterminées. La séquence prédéterminée de correspondance identifie la panne provoquant une signature de gain.

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