Optical Network Dimensioning via Frequency Interval Fiber Allocation
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Solution Overview
Problem
Current optical network systems face limitations in scalability and flexibility, leading to inefficient resource utilization, particularly in add/drop rate deployments, as fibers and ROADM degrees are typically added reactively rather than proactively based on network performance or simulation.
Innovation Solution
A method involving a network controller that determines utilized paths and link frequencies, partitions these into intervals, and assigns fibers to each interval to optimize ROADM degrees and network configuration, allowing proactive adjustments to improve resource utilization and reduce signal blocking rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If fibers and ROADM degrees are added reactively according to traffic growth, then network capacity increases, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by proactively adding fibers and ROADM degrees based on simulated network performance and utilization patterns before traffic demands fully materialize. The system analyzes historical traffic data and simulation results to predict future network needs, allowing infrastructure to be added in advance rather than reactively, thereby optimizing resource utilization efficiency while meeting capacity requirements.
2Productivity
If the number of ROADM degrees is increased to handle traffic growth, then network capacity improves, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the degree of ROADMs based on simulated performance metrics and actual network utilization patterns. Rather than uniformly increasing all ROADM degrees, the system identifies specific ROADMs and directions that require capacity increases, modifying parameters selectively to handle traffic growth while minimizing overall device complexity.
3Ease of manufacture
If uniform fiber allocation is used across all network links, then deployment simplicity is maintained, but network performance optimization deteriorates
Solution Approach 1:
The patent applies local quality by allocating fibers to network links based on their specific utilization frequencies and performance requirements rather than applying a uniform allocation strategy. The system identifies links with different utilization patterns and assigns appropriate fiber counts to each link, optimizing network performance while maintaining manageable deployment complexity through systematic local customization.
Data Source
AI summary
A method to select a number of fibers for ROADM-equipped nodes of an optical network by which a controller is operative to determine which links are utilized as well as their usage frequencies and then partition a scale of usage frequencies into a number of intervals. By assigning a number of fibers to each one of the intervals, a number of fibers is assigned to each link, according to their usage frequencies, setting the degree for ROADMs at the nodes. Simulations can evaluate the network's performance in terms of a blocking rate representing an overall signal blocking rate by the ROADMs at network nodes. The number of intervals, their ranges, and the number of fibers associated with each interval can be iterated until an improved or satisfactory network performance is achieved.