Network Path Failure Protection via Dynamic Bandwidth Allocation
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Solution Overview
Problem
Existing network protection methods struggle to effectively protect multiple working paths from failures, often leaving lower-priority paths disconnected during double or multiple line failures in optical transport networks.
Innovation Solution
A failure protection method that determines the allocation bandwidth for detected paths and switches data from failed working paths to a shared protection path, using a bandwidth calculation formula to ensure efficient resource distribution across multiple paths, allowing for simultaneous protection of multiple paths with varying priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single protection path is allocated for multiple working paths, then resource efficiency is improved, but the ability to protect multiple paths simultaneously deteriorates
Solution Approach 1:
The protection path is segmented into multiple protection channels, each dedicated to a specific working path. This segmentation allows the shared protection infrastructure to simultaneously protect multiple working paths without resource conflicts, resolving the contradiction between resource efficiency and simultaneous protection capability.
Solution Approach 2:
The protection path infrastructure is designed with multi-functionality to serve multiple working paths through shared protection channels. Each protection channel can be dynamically assigned to different working paths based on failure conditions, enabling the same physical infrastructure to provide universal protection across multiple paths.
2Productivity
If lower-priority working paths use shared protection resources, then resource utilization is improved, but path disconnection during failure deteriorates
Solution Approach 1:
Different protection channels are assigned different qualities or priorities based on the importance of the working paths they protect. Higher-priority working paths receive dedicated protection channels that guarantee connectivity during failures, while lower-priority paths share remaining resources, ensuring critical paths remain connected even when resource constraints exist.
Data Source
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AI summary
A failure protection method of a network connecting between nodes by multiple working paths and a protection path is disclosed. An allocation bandwidth is determined to allocate to a detected path where a failure is detected in multiple paths being set to the multiple working paths, depending on the detected path. The detected path is switched from one of the multiple working paths to the protection path. Data to be transmitted by the detected path is transmitted by using the allocation bandwidth determined within an entire bandwidth of the protection path.