Dynamic Optical Spectrum Allocation for Fiber Aging Compensation
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Solution Overview
Problem
Conventional spectrum sharing approaches in optical line systems result in sub-optimal performance and require frequent interventions due to static configurations, which lead to degraded performance and value over time.
Innovation Solution
The implementation of dynamic spectrum sharing management systems that assign value to optical spectrum based on spectral efficiency, adjust partitions over time, and utilize automation and terminal technologies to optimize spectrum allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional static spectrum sharing approaches are used, then initial spectrum allocation is simple, but performance and value degrade over time requiring frequent interventions
Solution Approach 1:
The patent implements dynamic spectrum sharing by continuously monitoring spectral efficiency metrics and automatically adjusting spectrum allocations in response to changing fiber characteristics over time. The system transitions from static initial allocation to dynamic adaptive allocation, where spectrum partitions are recalibrated based on real-time performance data to maintain optimal sharing arrangements throughout the fiber's operational lifetime
Solution Approach 2:
The system employs feedback mechanisms by continuously measuring spectral efficiency and signal-to-noise ratio across the optical spectrum, comparing these measurements against expected performance thresholds, and automatically triggering reallocation protocols when degradation is detected. This closed-loop feedback ensures performance stability without requiring frequent manual interventions
2Ease of operation
If fixed partition spectrum sharing is implemented, then initial configuration is straightforward, but operational flexibility and adaptability are reduced
Solution Approach 1:
The system enables dynamic spectrum reallocation by automatically adjusting partition boundaries based on measured spectral efficiency variations across different frequency bands and over time. This allows the network to adapt to changing fiber characteristics, temperature variations, and aging effects while maintaining straightforward operational management through automated control
Solution Approach 2:
The patent changes the allocation parameters dynamically by adjusting spectrum bandwidth assignments, center frequencies, and power levels based on measured performance metrics. This allows flexible adaptation to different operational conditions while maintaining simple user-facing interfaces through automated parameter optimization
3Ease of manufacture
If spectrum sharing does not account for SNR variations over frequency and time, then allocation is simple, but spectral efficiency and capacity are sub-optimal
Solution Approach 1:
The system applies local quality optimization by measuring and allocating spectrum based on the specific signal-to-noise ratio characteristics of each frequency band rather than treating the entire spectrum uniformly. This allows high-SNR bands to be utilized more aggressively while providing appropriate protection or reduced allocation in low-SNR regions, maximizing overall spectral efficiency
Solution Approach 2:
The patent implements dynamic spectrum allocation that adapts to temporal variations in SNR by continuously monitoring performance metrics and adjusting allocations in response to changing conditions such as fiber aging, temperature variations, and traffic patterns, thereby maintaining optimal spectral efficiency over the fiber's operational lifetime
Data Source
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AI summary
Systems and methods for optimization of spectrum sharing in optical line systems include, for at least one fiber having optical spectrum being shared by at least two users in an optical line system (100), assigning (302) value to the optical spectrum; determining (304) using a policy and the assigned value of the optical spectrum how to partition the optical spectrum between the at least two users; and causing (306) implementation of the partition of the optical spectrum. The assigned value of the optical spectrum can be based on information carrying capacity in bandwidth per second. The assigned value of the optical spectrum accounts for performance versus frequency, such that, e.g., two or more of the at least two users have different amounts of the optical spectrum from one another.