Optical Network Lightpath Power Management
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Solution Overview
Problem
Optical communication networks face significant heat dissipation challenges due to power dissipation in elements like router line cards and optical amplifiers, which can lead to overheating, especially as network elements reduce in size, necessitating a reduction in power dissipation without affecting communication rates.
Innovation Solution
A method for communicating optically between nodes in an optical network that involves forming lightpaths, determining traffic levels, and adjusting the number of active lightpaths based on traffic thresholds to reduce power consumption while maintaining configuration, using link aggregation control protocols and inverse multiplexing for traffic balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of active lightpaths is increased to handle higher traffic loads, then communication capacity is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the number of active lightpaths based on real-time traffic conditions. When traffic load decreases below a threshold, lightpaths are deactivated to reduce power consumption. When traffic increases above a threshold, lightpaths are reactivated to restore communication capacity. This dynamic adaptation resolves the contradiction by making the system flexible rather than static.
Solution Approach 2:
The system changes the operational state parameter of lightpaths between active and inactive states based on traffic thresholds. By monitoring traffic load and adjusting the number of active lightpaths accordingly, the system optimizes the balance between communication capacity and power consumption, resolving the technical contradiction through parameter adjustment.
2Loss of energy
If lightpaths are deactivated to reduce power consumption, then energy efficiency is improved, but communication reliability may deteriorate
Solution Approach 1:
The system implements feedback mechanisms by continuously monitoring traffic load on lightpaths and using this information to make informed decisions about activation and deactivation. The feedback loop ensures that lightpaths are only deactivated when traffic conditions permit, maintaining reliability while optimizing energy efficiency.
Solution Approach 2:
The system performs preliminary assessment of traffic conditions before deactivating lightpaths. By checking whether traffic load is below the threshold before deactivation, the system ensures that communication reliability is not compromised. This preliminary action prevents premature deactivation that would harm reliability while still achieving energy savings.
3Use of energy by moving object
If traffic is redistributed across fewer active lightpaths, then power consumption is reduced, but traffic balancing complexity increases
Solution Approach 1:
The system segments traffic management by treating each lightpath as an independent controllable unit with clear activation thresholds. This segmentation simplifies the overall complexity by breaking down the traffic balancing problem into discrete decisions about individual lightpath states, making the system more manageable despite the dynamic adjustments.
Data Source
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AI summary
A method for communicating optically between nodes of an optical network, including forming, between a first node and a second node of the network, a set of lightpaths, each of the set of lightpaths having a respective configuration, transferring communication traffic between the first and second nodes via the set of lightpaths, determining, for the set of lightpaths, that a communication traffic level associated therewith is less than a predetermined threshold, in response to the determining, removing at least one lightpath having a given configuration from the set of lightpaths to form a reduced set of lightpaths and transferring the communication traffic between the first and second nodes via the reduced set of lightpaths, while reducing the level of power consumption in the at least one lightpath and while maintaining the given configuration of the at least one lightpath.