Service-Margin-Aware Optical Line Alerts for Bit Error Prediction
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Solution Overview
Problem
Existing optical network systems struggle with accurately predicting Bit Error Risk (BER) for services, often raising alarms too early or too late due to broadly applied thresholds that do not account for individual service margins, making it difficult and costly to identify and address optical degradations.
Innovation Solution
Adopting Service Margin Aware Optical Line System (OLS) Thresholds (SMAOTTs) that are unique to each service and location within the OLS, allowing for more precise monitoring and alerting based on the actual optical service margin available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If predetermined thresholds are applied to all optical signals uniformly, then the monitoring system is simple to implement, but the alerts occur too early or too late and do not accurately predict bit errors
Solution Approach 1:
The patent applies local quality by transitioning from uniform thresholds to service-specific thresholds. Each service is assigned a customized threshold based on its individual optical margin, allowing the monitoring system to adapt to different service requirements and signal degradation characteristics, thereby improving alert accuracy without significantly increasing overall system complexity
Solution Approach 2:
The patent changes the threshold parameter from a fixed universal value to a dynamic service-dependent value. By calculating and applying different thresholds based on each service's optical margin and degradation characteristics, the system achieves more accurate bit error prediction while maintaining manageable complexity through automated threshold determination
2Reliability
If severe alerts such as Loss of Signal or Signal Out of Range are used, then bit error risk can be detected, but the alerts occur too late and do not provide early warning
Solution Approach 1:
The patent implements preliminary action by establishing service-specific thresholds that trigger alerts before severe conditions occur. By monitoring optical parameters against customized thresholds derived from each service's optical margin, the system provides early warning of potential bit errors, enabling proactive intervention before actual signal loss or severe degradation occurs
3Ease of operation
If broadly applied thresholds are used in existing OLS, then the system is easier to operate, but it is difficult and time-intensive to identify causes and locations of issues
Solution Approach 1:
The patent applies segmentation by dividing the monitoring system into service-specific components. Each service has its own dedicated threshold and monitoring parameters, allowing the system to isolate and identify issues at the service level. This segmentation enables faster troubleshooting by pinpointing exactly which service and location are affected, reducing the time needed to identify causes while maintaining operational simplicity through automated service identification
Data Source
AI summary
A communication method leveraging service margin aware thresholds of optical alerts within an optical communication network line system is provided. The method includes determining an optical margin for a service provided between a source transponder and a destination transponder through an Optical Line System (OLS). The communication method includes monitoring PMs and fixed predetermined thresholds to raise a threshold crossing alert (TCA) indicating a monitored PM has crossed a fixed predetermined threshold. The method also determines a Service Margin Aware OLS TCA Threshold (SMAOTT) that is unique to a service or location within the OLS, monitors PMs and the determined SMOATT at a network element within the OLS, and raises a specific TCA associated with a SMAOTT when a monitored PM satisfies the SMAOTT.