Och-SPRing Switching Device Eliminates Cross Connection Units
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing WDM ring networks face inefficiencies in wavelength utilization and increased costs due to the need for cross connection units, which degrade OSNR and require excessive optical power budgets, particularly in implementing Optical Channel Shared Protection Ring (Och-SPRing) schemes.
Innovation Solution
A connection switching device with two switches per node, allowing flexible configuration and operation between working and backup paths without the need for cross connection units, enabling efficient signal switching and reducing construction costs by allowing optional assembly and deconstruction of devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cross connection units are used to implement Och-SPRing, then wavelength utilization efficiency is improved, but device complexity and optical power budget requirements increase
Solution Approach 1:
The patent extracts and eliminates the cross connection unit from the Och-SPRing implementation. By removing this complex component, the system achieves the same wavelength utilization efficiency through a simplified architecture using only optical switches and control units, thereby reducing device complexity while maintaining productivity.
Solution Approach 2:
The patent makes the optical switch and control unit perform multiple functions that previously required separate cross connection units. The control unit manages both working and backup path switching, and the optical switch handles both signal routing and protection switching, achieving multi-functionality that eliminates the need for dedicated cross connection units.
2Productivity
If cross connection units are used to implement Och-SPRing, then wavelength utilization efficiency is improved, but optical power budget requirements increase
Solution Approach 1:
The patent removes the cross connection unit that caused excessive optical power consumption. By eliminating this component, the system reduces the optical power budget requirements while maintaining efficient wavelength utilization through the simplified switch-based architecture.
Solution Approach 2:
The patent replaces the expensive and power-intensive cross connection unit with more efficient optical switches that consume less power. The new architecture uses simpler, more energy-efficient components that achieve the same functional goals with reduced optical power budget requirements.
3Reliability
If cross connection units are used in WDM ring network, then protection capability is improved, but construction costs increase
Solution Approach 1:
The patent extracts and removes the cross connection unit from the protection architecture. By eliminating this expensive component, the system maintains protection capability through a simpler switch-based approach, thereby reducing construction costs while preserving reliability.
Solution Approach 2:
The patent merges the protection switching function with the existing optical switch and control unit architecture. Instead of adding separate cross connection units for protection, the system integrates protection switching into the existing switch infrastructure, reducing construction costs while maintaining protection capability.
Data Source
AI summary
The present invention discloses a method and device for implementing Och-SPRing in Wavelength Division Multiplexing system. The method includes: in the node of the optical network system, setting two switches in each working path and its backup path that pass through the node, each of which includes two input ports and one output port; when receiving signals, controlling the first switch to selectively accept the downlink service signals sent from the working path or the backup path; when sending signals, sending the uplink service signal sent from the local device respectively to one output port of uplink direction in the working path and the second switch; controlling the second switch to choose one signal among the local uplink service signal and the downlink service signal sent from the backup path to input into the uplink direction of the backup path. The method of the present invention can largely reduce construction cost of the system, save optical power budget, and improve OSNR.