Optical Transmission Failure Location Identification
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Solution Overview
Problem
Existing methods for identifying failure locations in optical transmission systems are insufficient in accuracy, particularly as systems increase in capacity and complexity.
Innovation Solution
The optical transmission system employs monitoring means at nodes to collect signal information in time series from transmission and reception ends, and control means to perform a failure-suspected component extraction process and a failure location identification process, detecting abnormalities in temporal signal changes to pinpoint failure locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If optical transmission systems increase in capacity and area, then system performance and coverage are improved, but failure location identification accuracy deteriorates
Solution Approach 1:
The patent segments the optical transmission system into multiple components including optical paths, amplifiers, multiplexers/demultiplexers, and nodes. Each component is monitored independently with dedicated monitoring means, allowing failure location identification even in large-scale systems with increased capacity and area.
Solution Approach 2:
The patent introduces management information as an intermediary that collects and correlates data from multiple monitoring points across the optical transmission system. This intermediary layer enables accurate failure location identification by analyzing relationships between signals from different components without requiring direct observation of the failure point.
2Device complexity
If monitoring is performed only at reception end based on optical signal characteristics, then device complexity is reduced, but failure location identification accuracy deteriorates
Solution Approach 1:
The monitoring function is segmented and distributed to multiple locations including transmission ends, reception ends, and intermediate points within nodes. Each monitoring point collects local signal characteristics, and the management information correlates these distributed measurements to achieve accurate failure location identification without requiring complex centralized equipment.
Solution Approach 2:
The monitoring means at each node is designed to perform multiple functions: collecting optical signal characteristics locally, detecting abnormalities, and providing data to the management information system. This multi-functionality reduces the need for specialized complex equipment at any single location while maintaining high identification accuracy.
3Loss of time
If packet loss information and allocation relationships are used to narrow down suspected area, then detection speed is improved, but failure location identification accuracy deteriorates
Solution Approach 1:
The patent performs preliminary monitoring and collection of signal characteristics at multiple points before failures occur. The management information system continuously maintains updated information about signal relationships and allocation patterns, enabling rapid failure location identification when anomalies occur without requiring time-consuming analysis of packet loss data alone.
Solution Approach 2:
The system implements feedback loops where monitoring means continuously provide signal characteristic data to the management information, which then updates its understanding of normal signal relationships. When failures occur, this pre-established knowledge base enables rapid and accurate failure location identification by comparing current readings against the feedback-collected baseline information.
Data Source
AI summary
An optical transmission system includes nodes connected to each other by optical transmission lines, and includes: monitoring parts each configured to collect signal information in time series at at least one signal collection point of a transmission end of a respective node, a reception end of the respective node, and a location at or between devices in the respective node; and an operation system configured to control the monitoring parts. The operation system extracts a component estimated to include a failure location by causing the monitoring parts to observe signal information on a reception end of a component, and, in the component, identifies the failure location by causing the monitoring parts to observe a temporal change of the signal information at the signal collection point to detect an abnormality.