Optical Network Linear Protection via Service Priority
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Solution Overview
Problem
Existing optical network protection mechanisms require fixed configuration of working and protection paths, leading to inadequate protection during simultaneous failures and lack of priority differentiation for extra services, resulting in low security.
Innovation Solution
A linear protection method for optical networks that sets service priorities and selects a protection path with lower priority to bridge-switch services, modifying priorities to ensure effective path protection and restoration, while adjusting paths based on fixed and service priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the number of protection paths is fixed and less than the number of working paths, then device complexity is reduced, but reliability deteriorates as part of working paths cannot be protected during simultaneous failures
Solution Approach 1:
The patent implements dynamic protection path selection where protection paths are not fixed but dynamically determined based on failure scenarios. The system evaluates multiple potential protection paths and selects the optimal one for each failure case, allowing the protection configuration to adapt to different failure conditions rather than using a static fixed configuration.
Solution Approach 2:
The system changes the parameter of protection path selection from a fixed configuration to a dynamic selection process. By introducing priority levels and evaluating different failure scenarios, the system transforms the protection mechanism from static to adaptive, where the protection path is determined based on current network conditions and failure patterns.
2Ease of operation
If protection paths do not differentiate service priorities, then ease of operation is improved, but reliability deteriorates as extra services have low security during failures
Solution Approach 1:
The patent applies local quality by assigning different protection priorities to different services. Instead of treating all services uniformly, the system differentiates protection levels based on service importance, with high-priority services receiving preferred protection paths and extra services receiving protection only when high-priority services are not affected. This localized differentiation enhances extra service security while maintaining operational simplicity.
Solution Approach 2:
The system segments services into different priority levels (high-priority and extra services) and applies different protection strategies to each segment. This segmentation allows the protection mechanism to handle different service types differently, ensuring that extra services receive appropriate protection without compromising the simplicity of overall protection path management.
3Reliability
If protection paths are dynamically selected based on service priorities, then reliability is improved, but device complexity increases due to priority management and path selection mechanisms
Solution Approach 1:
The system performs preliminary action by pre-defining service priorities and protection path preferences before failures occur. Services are assigned priority levels in advance, and the system pre-evaluates potential protection paths based on these priorities. When a failure occurs, the pre-established priority framework and path preferences enable rapid protection switching without complex real-time calculations, thus improving reliability while limiting complexity growth.
Solution Approach 2:
The protection mechanism operates autonomously by automatically selecting protection paths based on pre-configured service priorities and failure detection. The system self-determines which services require protection and which paths to use without requiring complex manual intervention or centralized control, thereby improving reliability while keeping the management mechanism relatively simple.
4Ease of operation
If all service paths are treated equally without priority differentiation, then ease of operation is maintained, but reliability deteriorates as low-priority services consume protection resources needed for high-priority services
Solution Approach 1:
The patent implements local quality by applying different protection policies to different service priorities. High-priority services receive preferential treatment with dedicated protection paths and higher protection thresholds, while extra services receive protection only when resources are available. This localized differentiation ensures that high-priority services maintain reliable protection while the overall system remains relatively simple to operate.
Data Source
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AI summary
The present invention discloses a linear protection method for an optical network, used for protecting a failed service path in the optical network, and the method comprises: setting priorities of services carried on service paths participating in linear protection of the optical network as service priorities; selecting; from the service paths participating in the linear protection, a service path of which the service priority is lower than that of the failed service path as a protection path, and bridge switching the service on the failed service path to the protection path. The present invention implements protection of service paths according to the priority of the service carried on the failed service path, and enhances the security of service paths.