Ethernet Linear Protection Switching State Transition Mechanism
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Solution Overview
Problem
Current state transition mechanisms in Ethernet linear protection switching lead to unnecessary state transitions, resulting in traffic loss and increased protection switch time due to the prioritization of lower priority commands and the need for additional APS algorithm re-computation.
Innovation Solution
A method and means for state transition in Ethernet linear protection switching that considers both overriding and received messages to avoid unnecessary middle states, allowing direct state changes based on both messages, thereby reducing traffic loss and protection switch time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current state transition mechanism prioritizes lower priority commands, then the system follows standard protocol specifications, but unnecessary state transitions occur causing traffic loss and increased protection switch time
Solution Approach 1:
The patent applies preliminary action by checking for overriding messages before executing state transitions. The system preemptively identifies and processes higher priority commands that may have been overridden, preventing unnecessary intermediate state transitions and reducing protection switch time while maintaining protocol compliance.
Solution Approach 2:
The patent implements dynamics by making the state transition mechanism adaptive to message priority levels. Instead of rigidly following sequential processing, the system dynamically adjusts its behavior based on the priority of received messages, allowing it to skip unnecessary intermediate states when higher priority commands are detected.
2Reliability
If the system processes commands sequentially according to priority, then protocol specifications are followed, but additional APS algorithm re-computation is required increasing processing time
Solution Approach 1:
The system performs preliminary checking of message priorities and overriding relationships before initiating full APS algorithm re-computation. By identifying higher priority overriding messages in advance, the system可以避免 unnecessary intermediate state transitions and their associated algorithm re-computations, thus improving productivity while maintaining protocol compliance.
Solution Approach 2:
The patent applies skipping by allowing the state transition mechanism to bypass unnecessary intermediate states when higher priority overriding messages are detected. This rushing through of intermediate steps eliminates redundant APS algorithm re-computations and accelerates the overall state transition process.
3Reliability
If intermediate states are entered during state transitions, then protocol state machine is followed, but traffic loss occurs during the transition period
Solution Approach 1:
The system performs preliminary detection of overriding messages and their priorities before executing state transitions. By identifying higher priority commands that would override current states in advance, the system can directly transition to the final state without entering unnecessary intermediate states, thereby preventing traffic loss during those intermediate periods while still following the protocol state machine.
Data Source
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AI summary
The present invention relates to state transition, especially relates to method and means for state transition of Ethernet linear protection switching. It is provided a method of state transition for a local end of a protection group of Ethernet linear protection switching in a local network element, and the method comprises receiving a first message configured to change the state of the local end with a first state, the first message being overridden by the first state; receiving a second message configured to change the state of the local end; determining a second state of the local end on the basis of the first message and the second message; and changing the state of the local end into the second state. In this way, there will be no unnecessary state transition and then no traffic loss caused by the unnecessary state transition.