ROADM DWDM Route Planning Using Performance Monitoring Feedback
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Solution Overview
Problem
Conventional route planning tools for ROADM DWDM networks deploy unnecessary regenerators and expensive transponders due to conservative assumptions about fiber losses, noise figures, and OSNR requirements, leading to inefficiency and increased costs.
Innovation Solution
Integrate performance monitoring data into the route planning tool to optimize transponder and regenerator placement by using real-time OSNR margins, CD, PMD, and PDL values, reducing the need for costly equipment and improving network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conservative assumptions about fiber losses, noise figures, and OSNR requirements are used in route planning, then reliability of transmission is improved, but device complexity and cost increase due to unnecessary regenerators and expensive transponders
Solution Approach 1:
The patent implements a feedback mechanism where the route planning tool continuously retrieves actual performance monitoring data from the optical network (including OSNR, fiber loss, noise figure measurements) and uses this real-world feedback to adjust and optimize transponder and regenerator placement decisions, replacing conservative assumptions with measured data
Solution Approach 2:
The invention changes the parameters used for route planning from fixed conservative assumptions to dynamic, measured parameters including actual OSNR margins, fiber attenuation coefficients, and noise figures obtained through performance monitoring, allowing optimization of equipment placement based on real network conditions
2Reliability
If conservative assumptions are used in route planning, then transmission reliability is improved, but network cost increases due to deployment of unnecessary regenerators and expensive transponders
Solution Approach 1:
The route planning tool uses feedback from actual performance monitoring data to determine the true need for regenerators and transponders, avoiding unnecessary deployments by basing decisions on measured OSNR margins and signal quality rather than conservative worst-case assumptions
Solution Approach 2:
The patent enables the use of less expensive transponder configurations by demonstrating through measured data that high-performance expensive transponders are not always necessary, allowing optimization between cost and performance based on actual network conditions rather than uniform conservative standards
3Quantity of substance
If performance monitoring data is integrated into route planning, then network cost is reduced by optimizing equipment placement, but measurement precision requirements increase
Solution Approach 1:
The patent implements preliminary performance monitoring and characterization of the optical network before finalizing route planning decisions, allowing the system to gather necessary measurement data in advance and use it to optimize equipment placement without requiring ultra-precise measurements during the planning execution phase
Data Source
AI summary
Aspects of the subject disclosure may include, for example: receiving traffic pattern data/parameters associated with a reconfigurable optical add-drop multiplexer (ROADM) dense wavelength-division multiplexing (DWDM) network; defining a configuration of the network based upon the traffic pattern data/parameters; outputting the configuration to facilitate physical provisioning and operation of ROADM nodes (and one or more ILA(s), if any) according to the configuration; receiving performance monitoring (PM) data indicative of operation of the network as configured according to the configuration; defining an updated configuration of the network that is based upon the PM data, wherein the updated configuration adds to the network at least one pair of transponders, at least one regenerator, or a combination thereof; and outputting the updated configuration to facilitate physical updating of the network in a manner such that the transponders, the regenerator(s), or the combination thereof is placed into operation. Other embodiments are disclosed.