Optical Transponder Error Management for OTN Sublayers
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Solution Overview
Problem
In optical transport networks, the increased complexity of multiple optical channel sublayers due to high data transmission rates makes it difficult to detect and manage errors effectively, leading to increased load on the system when errors occur, as each layer may experience errors independently.
Innovation Solution
An optical transponder with an error management unit that includes an error detector, treatment unit, and correlation investigator to detect, treat, and investigate errors in specific layers of the G.709 OTN frame, allowing for independent operation and management of up to eight optical channel sublayers, focusing on error treatment and correlation within affected layers only.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple optical channel sublayers are operated independently to support high data transmission rates, then the adaptability and transmission capacity are improved, but the device complexity and difficulty of error management increase
Solution Approach 1:
The error management function is segmented into three distinct units: error detector, error treatment unit, and error correlation investigator. Each unit handles a specific aspect of error management, allowing the system to manage multiple optical channel sublayers independently while maintaining organized and modular error handling procedures.
Solution Approach 2:
The error detector acts as an intermediary that monitors error signals from multiple optical channel sublayers and forwards them to the error treatment unit. This intermediary structure simplifies the management complexity by creating a clear separation between error detection, treatment, and investigation functions.
2Reliability
If error detection and treatment functions are implemented across all optical channel sublayers, then the reliability is improved, but the load on the system increases
Solution Approach 1:
The error management system applies local quality by focusing error detection and treatment resources on specific layers where errors are detected. The error correlation investigator identifies which specific layer experiences errors and directs treatment resources accordingly, rather than uniformly processing all layers, thereby reducing overall system load while maintaining reliability.
Solution Approach 2:
The system implements partial action by not treating errors in all layers simultaneously but only in the specific layer where errors are detected. The error treatment unit activates treatment functions selectively based on error detection results, reducing unnecessary processing load while ensuring reliable error handling where needed.
3Measurement precision
If comprehensive error monitoring is performed across all layers, then the measurement precision is improved, but the loss of time and processing overhead increase
Solution Approach 1:
The error detector continuously monitors error signals from optical channel sublayers in advance, maintaining readiness to detect errors without waiting for system failures. This preliminary monitoring ensures high measurement precision while the selective treatment approach minimizes processing time by preparing detection mechanisms beforehand but activating full treatment only when necessary.
Data Source
AI summary
Provided are an optical transponder that processes a G.709 frame that includes an overhead for operation, administration, and maintenance of an optical channel and an overhead for forward error correction, and a method of detecting and treating errors in optical-channel sublayers of the same. The method includes detecting an error signal or a maintenance signal from a G.709 frame that includes an overhead for operation, administration, and maintenance of an optical channel and an overhead for forward error correction; treating errors in a predetermined layer of a plurality of layers that requires error treatment when the error signal or the maintenance signal is detected or canceled; and investigating a reason for the errors in the predetermined layer.