Optical Bypass Switch for Ring Network Fault Isolation
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Solution Overview
Problem
Optical networks with ring architectures face disruptions and service outages due to faulty nodes, particularly during power failures, making it difficult to maintain communication and customer satisfaction.
Innovation Solution
The implementation of an optical bypass switch system that routes optical signals around or bypasses a faulty node by monitoring voltage levels and redirecting signals using 2×2 optical fiber switches, ensuring continuous network integrity even when a node is inoperable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a node in the optical network experiences power failure or equipment malfunction, then the node cannot receive or transmit optical signals, but the existing ring architecture cannot automatically bypass the faulty node, causing service interruptions
Solution Approach 1:
The optical bypass switch is pre-configured with monitoring circuits that continuously check voltage levels at the node. When power failure or equipment malfunction is detected (voltage below threshold), the switch automatically activates bypass paths without requiring manual intervention, thus maintaining network continuity while simplifying fault handling operations
Solution Approach 2:
The optical bypass switch serves as an intermediary device between the faulty node and the rest of the network. It monitors the node's status and, when failure is detected, redirects optical signals through alternative paths (bypassing the faulty node) while still allowing the node to be powered or repaired, thus resolving the contradiction between maintaining reliability and enabling automatic fault handling
2Difficulty of detecting and measuring
If optical signals are continuously monitored at a node to detect power failures, then fault detection capability is improved, but the system complexity increases due to additional monitoring equipment
Solution Approach 1:
The optical bypass switch integrates multiple functions into a single device: it acts as both an optical signal routing switch and a power/equipment status monitor. The voltage monitoring capability is built into the switch itself rather than being a separate system, thus improving fault detection capability while minimizing the increase in overall system complexity
Solution Approach 2:
The optical bypass switch performs self-monitoring of the node's power and equipment status through its integrated voltage sensing circuits. The switch automatically detects when voltage drops below the threshold indicating power failure or equipment malfunction and autonomously activates the bypass function, eliminating the need for external monitoring equipment and reducing system complexity
Data Source
AI summary
A system and methods are provided for communicating optical signals in a multipath optical network, such as ring network architecture. The system and methods provided are operable to bypass a faulty node in the optical network under various conditions. Faulty nodes may be associated with various failures, such as equipment failure, power failure, etc. The system and methods utilize an apparatus for communicating optical signals to adjacent nodes, bypassing the failed node, when a certain amount of power is provided to the node or apparatus. The system and methods utilize an apparatus for communicating optical signals to equipment located at an associated node when an amount of power is not provided to the node or apparatus.