Network Protection Switching Accuracy via Source Node Feedback
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Solution Overview
Problem
Existing communications networks face challenges in accurate protection switching due to erroneous switching during faults, leading to reduced robustness and increased service disruption.
Innovation Solution
A network protection method where a sink node monitors communication paths and determines whether to switch services to a standby path based on the communication status of both the primary and standby paths, including obtaining the communication status of the source node to avoid erroneous switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If protection switching is performed based solely on local path status, then switching speed is improved, but switching accuracy deteriorates due to erroneous switching
Solution Approach 1:
The patent implements feedback by having the sink node obtain communication status information from the source node and use this feedback to determine whether protection switching is necessary. The sink node compares its local path status with the source node's status to avoid erroneous switching, creating a closed-loop control system that improves switching accuracy while maintaining rapid response.
Solution Approach 2:
The patent uses communication status information as an intermediary between the source node and sink node. This status information mediates the protection switching decision by providing additional context about the source node's path condition, allowing the sink node to make more accurate switching decisions without directly contacting the source node or delaying the switching process.
2Device complexity
If protection switching is performed without checking source node status, then device complexity is reduced, but reliability deteriorates due to erroneous switching
Solution Approach 1:
The patent applies preliminary action by having the source node proactively send its communication status to the sink node before protection switching is needed. This advance preparation allows the sink node to make accurate switching decisions without adding complex real-time coordination mechanisms, thereby improving reliability while keeping device complexity low.
Solution Approach 2:
The source node performs self-service by autonomously monitoring its own communication path status and reporting this information to the sink node. This self-monitoring capability eliminates the need for the sink node to directly query or coordinate with the source node during fault conditions, simplifying the overall system while improving switching reliability.
Data Source
AI summary
In a network protection method, a network node, and a communications system provided in embodiments of the present disclosure, when signal degrade or signal fail occurs in a service transmission path, a communication status of a source node of a current protection segment is obtained, and whether to perform protection switching is determined according to the communication status of the source node and a communication status of a local communication path. This can avoid erroneous switching to some extent, thereby improving protection switching accuracy of a communications network.