Dual Interconnecting Nodes for Linear Protection Domain Connectivity
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Solution Overview
Problem
Existing linear protection switching methods disconnect traffic between end nodes when a defect occurs at an interconnecting node, as they rely on a single node for interconnecting two protection domains.
Innovation Solution
The use of two interconnecting nodes, a working interconnecting node and a protection interconnecting node, which monitor defects in respective paths and control the switching of user traffic through existing linear protection switching methods, ensuring continuous traffic flow by dynamically re-routing through connection paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single interconnecting node is used to connect two protection domains, then the device complexity is reduced, but the reliability deteriorates because traffic disconnection occurs when a defect occurs at the interconnecting node
Solution Approach 1:
The single interconnecting node is segmented into two separate nodes: a working interconnecting node and a protection interconnecting node. This segmentation allows the system to isolate failures to specific nodes, preventing complete traffic disconnection. The working node handles normal traffic while the protection node provides backup routing capabilities.
Solution Approach 2:
The protection interconnecting node is configured in advance as a backup system with pre-established connection paths. When a defect occurs at the working interconnecting node, the protection node is activated beforehand to cushion against the failure, ensuring continuous traffic flow without interruption.
2Ease of operation
If a single interconnecting node is used, then the ease of operation is improved, but the reliability deteriorates due to lack of defect monitoring and rerouting capability
Solution Approach 1:
The working interconnecting node continuously monitors the operational status of connection paths and sends feedback information to the protection interconnecting node. This feedback mechanism enables the protection node to detect defects and activate rerouting procedures automatically, maintaining reliability without complicating user operations.
Solution Approach 2:
The protection interconnecting node autonomously monitors its own status and the status of connection paths, automatically detecting defects and initiating rerouting without external intervention. This self-service capability maintains system reliability while keeping operations simple for users.
3Ease of manufacture
If existing linear protection switching method is applied without changes, then the ease of manufacture is improved, but the adaptability deteriorates because it cannot handle defects at interconnecting nodes
Solution Approach 1:
The protection interconnecting node is designed with multi-functionality, serving both as a backup routing node and as an active monitoring node. It performs the same basic functions as the working node while additionally providing protection against defects, thereby enhancing adaptability without requiring complete redesign of the protection switching method.
Data Source
AI summary
A linear protection switching-based domain connecting method includes determining, by a protection interconnecting node, a user traffic transceiving path based on information on a presence or absence of defect in working paths and protection paths, generating working path control information and protection path control information based on information on the determined user traffic transceiving path and the information on the presence or absence of the defect in the protection paths, and transmitting the generated working path information to the working interconnecting node, and connecting two paths among the protection paths, and the connection path based on the protection path control information.