Shared Mesh Protection Switching Priority Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing protection switching schemes in networks operate independently, leading to inefficient use of resources and lack of priority-based protection coordination between end-to-end linear protection domains, resulting in suboptimal resource allocation and protection prioritization.
Innovation Solution
A shared mesh protection switching method that allows protection paths of multiple end-to-end linear protection domains to share resources by comparing priorities and using Lockout of Protection (LoP) messages to manage resource allocation and prohibition based on priority levels, ensuring higher-priority domains are protected first.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protection paths of multiple end-to-end linear protection domains operate independently, then each domain can ensure its own protection reliability, but network resources cannot be shared and resource utilization efficiency deteriorates
Solution Approach 1:
The patent merges multiple independent protection domains into a shared mesh protection domain, allowing protection paths from different domains to share network resources. This combining approach enables resource pooling while maintaining protection capabilities across domains, directly resolving the contradiction between reliability and resource efficiency
Solution Approach 2:
The invention creates a universal protection mechanism where a single protection path can serve multiple working paths from different protection domains. The shared mesh protection domain provides multi-functional capability, allowing the same network resources to be utilized by multiple domains, thereby improving resource utilization while preserving protection reliability
2Loss of energy
If protection paths are shared among multiple protection domains, then network resource utilization efficiency improves, but coordination complexity and difficulty of managing priority-based protection increases
Solution Approach 1:
The patent introduces priority levels that differentiate protection domains locally, allowing each domain to be assigned a specific priority (e.g., first priority, second priority). This local quality assignment simplifies coordination by providing clear rules for resource allocation during failures, reducing the complexity of managing shared resources across multiple domains
3Device complexity
If priorities are not defined in protection domains, then the protection switching scheme remains simple, but preferential protection cannot be provided when limited network resources are shared
Solution Approach 1:
The invention introduces a priority parameter to characterize protection domains, enabling the system to adapt its behavior based on this parameter. By assigning different priority levels to different domains, the system gains the versatility to provide preferential protection to high-priority domains when resources are constrained, while maintaining relative simplicity in the basic protection switching mechanism
Data Source
AI summary
A method for protection switching in a shared node where protection resources of a plurality of end-to-end linear protection domain are shared is provided. The shared node receives a first protection switching event message notifying that a protection switching event occurs from a first node of a first end-to-end linear protection domain, and determines whether to prohibit protection switching on a second end-to-end linear protection domain by comparing a priority of the first end-to-end linear protection domain with a priority of the second end-to-end linear protection domain.