Link Failure Detection and Routing Priority Adjustment
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Solution Overview
Problem
In existing network communication systems, failures in physical or logical communication paths are often hidden at the network layer (L3), leading to unreliable signal transfer even when signs of failure are detected, as effects of failures are not apparent unless they worsen significantly.
Innovation Solution
A transfer device and system equipped with a detection unit to identify signs of failure in links between transfer devices, and a management unit that updates routing tables to lower the priority of affected paths, ensuring more reliable communication by detecting and managing link quality issues proactively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If failure detection is performed only at L2/L1 layers, then the detection method is simple, but failures remain hidden at L3 and communication reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by detecting failure signs at L2/L1 layers before they propagate to L3. The detection unit monitors links between transfer devices and identifies degradation signs early, allowing the system to take preventive routing actions before communication reliability is compromised at the network layer.
Solution Approach 2:
The patent introduces an intermediary mechanism by adding a detection unit that operates between L2/L1 and L3 layers. This intermediary detects failure signs at lower layers and communicates them to the routing control, bridging the gap between physical link status and network layer routing decisions without requiring complete L3 failure manifestation.
2Reliability
If traffic continues to be routed through links with detected failure signs, then routing simplicity is maintained, but communication reliability deteriorates
Solution Approach 1:
The patent implements feedback by continuously monitoring link status through the detection unit and dynamically adjusting routing tables based on detected failure signs. When degradation is detected, the system feeds back this information to the routing control, which automatically updates routing tables to avoid affected links, maintaining reliability while keeping routing management automated rather than manually complex.
Solution Approach 2:
The patent applies dynamics by making routing tables adaptive rather than static. The system dynamically adjusts routing priorities based on real-time link quality detection, automatically rerouting traffic away from links showing failure signs. This dynamic behavior maintains communication reliability without requiring manual routing intervention.
3Reliability
If routing tables are updated to avoid affected links, then communication reliability improves, but routing complexity increases
Solution Approach 1:
The patent applies self-service by enabling the routing system to automatically detect, evaluate, and respond to link failures without external intervention. The detection unit and routing control work autonomously to monitor links and update routing tables, making the system self-managing and reducing the need for complex external routing management while maintaining high reliability.
Data Source
AI summary
A transfer device includes a detection unit configured to detect a sign of a failure in a link between transfer devices, and a management unit configured to update a routing table to lower a priority of a path via the link when the sign of the failure is detected by the detection unit.