ODU Shared Protection Ring Hierarchical Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In optical communication networks, existing ODU shared protection ring (SPRing) technologies face challenges with excessive number of protection groups and prolonged switching times, especially when dealing with multi-level ODU services, which hinder smooth operation and survivability.
Innovation Solution
The method involves taking a higher-order ODU as the protection granularity, allowing for demultiplexing and multiplexing processes to reduce the number of protection groups and accelerate switching by monitoring and switching through lower-order ODUs, utilizing path monitoring to trigger switches and employing Automatic Protection Switching/Protection Communication Channel (APS/PCC) for information transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a low order (LO) ODU is taken as a protection granularity, then the protection coverage is more detailed, but the number of protection groups increases and switching time becomes too long
Solution Approach 1:
The patent segments the protection mechanism into two distinct layers: a high-order ODU protection ring for fast switching and a low-order ODU protection ring for detailed protection coverage. This segmentation allows each layer to perform its specialized function without the drawbacks of using a single granularity level for both purposes.
Solution Approach 2:
The patent introduces a hierarchical dimension to the protection structure by creating protection rings at multiple ODU levels (high-order and low-order). This dimensional approach transforms the single-level protection problem into a multi-level solution, enabling simultaneous achievement of fast switching and comprehensive coverage.
2Reliability
If a low order (LO) ODU is taken as a protection granularity, then the protection coverage is more detailed, but the number of protection groups becomes larger increasing system complexity
Solution Approach 1:
The patent segments the protection mechanism into two distinct layers: a high-order ODU protection ring for fast switching and a low-order ODU protection ring for detailed protection coverage. This segmentation allows each layer to perform its specialized function without the drawbacks of using a single granularity level for both purposes.
Solution Approach 2:
The patent introduces a hierarchical dimension to the protection structure by creating protection rings at multiple ODU levels (high-order and low-order). This dimensional approach transforms the single-level protection problem into a multi-level solution, enabling simultaneous achievement of fast switching and comprehensive coverage.
3Reliability
If cross switching at each ODU level is performed, then protection for current level is achieved, but the switching coordination becomes complex and cannot meet multi-level service protection needs
Solution Approach 1:
The patent segments the protection mechanism into two distinct layers: a high-order ODU protection ring for fast switching and a low-order ODU protection ring for detailed protection coverage. This segmentation allows each layer to perform its specialized function without the drawbacks of using a single granularity level for both purposes.
Solution Approach 2:
The patent introduces a hierarchical dimension to the protection structure by creating protection rings at multiple ODU levels (high-order and low-order). This dimensional approach transforms the single-level protection problem into a multi-level solution, enabling simultaneous achievement of fast switching and comprehensive coverage.
Data Source
AI summary
A method and a device for realizing an optical channel data unit (ODU) shared protection ring (SPRing) are disclosed. The method includes: first, receive an ODUj, wherein the ODUj carries an ODUi; then, perform de-multiplexing processing to obtain the ODUi from the ODUj; next, multiplex the ODUi to an optical channel data unit k (ODUk); meanwhile, keep monitoring the ODUk; and when the monitoring result that is obtained through monitoring the ODUk indicates that a failure has occurred, perform a switching on the ODUi; wherein i, j, k are integers equal to or larger than 0, k is larger than j, j is larger than i, and i, j, k are used to indicate different rates of respective optical channel data unit (ODU) signals.