Wavelength Switch-Back Control for Optical Network Recovery
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Solution Overview
Problem
Current optical communication systems face challenges in efficiently switching back to the original communication wavelength after an abnormality is recovered, leading to increased operational burdens and complexities in managing communication wavelengths during network recovery.
Innovation Solution
Incorporating a common monitoring control unit in the station-side device that dynamically switches communication wavelengths from a current wavelength to an auxiliary wavelength during abnormalities and back to the original wavelength upon recovery, utilizing a station-side management table to manage wavelength allocation and switch-back operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual wavelength switching operations are performed after abnormality recovery, then communication can be restored, but operational burden and complexity increase
Solution Approach 1:
The system performs automatic wavelength switch-back operations without manual intervention. The wavelength management device autonomously monitors abnormality recovery status and executes wavelength switching based on stored switch-back destination information, eliminating the need for manual operational inputs while ensuring communication restoration.
Solution Approach 2:
The system pre-stores switch-back destination wavelength information in advance before abnormalities occur. When recovery is detected, the predetermined wavelength switching table provides immediate switching targets, enabling rapid automatic restoration without real-time decision-making or manual configuration.
2Ease of operation
If wavelength switching is automated, then operational complexity is reduced, but system complexity increases
Solution Approach 1:
The wavelength management device serves as an intermediary between the optical communication system and the wavelength switching operations. It maintains a wavelength switching table with switch-back destination information and automatically executes switching based on abnormality recovery detection, simplifying operations while centralizing control logic in a dedicated management component.
Solution Approach 2:
The system dynamically adjusts wavelength allocations based on real-time abnormality recovery status. The wavelength management device continuously monitors system state and automatically updates wavelength assignments using pre-stored switch-back destination information, enabling flexible adaptation without manual intervention.
3Reliability
If auxiliary wavelengths are used during abnormalities, then communication continuity is maintained, but wavelength management complexity increases
Solution Approach 1:
The system assigns specific auxiliary wavelengths to particular subscriber devices or communication paths affected by abnormalities. The wavelength management device maintains targeted switch-back destination information for each affected channel rather than managing all wavelengths globally, reducing overall management complexity while ensuring communication continuity for affected users.
Data Source
AI summary
An optical communication system of the present invention switches a communication wavelength from a current communication wavelength to a auxiliary communication wavelength when an abnormality occurs in a communication wavelength between a station-side device and any one of a plurality of subscriber devices. Further, this optical communication system switches a communication wavelength used for communication between the subscriber device and the station-side device that perform communication using the auxiliary communication wavelength from the auxiliary communication wavelength back to the current communication wavelength when communication is recovered from an abnormality in the current communication wavelength.