Adaptive Laser Configuration in Coherent WDM-PONs
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Solution Overview
Problem
Current telecommunications networks, particularly access networks, face significant energy inefficiencies due to the large number of active components and high energy demand, which is exacerbated by the need for high-bit-rate applications in future-proof optical access networks. Existing PON variants do not effectively adapt to varying traffic loads, leading to unnecessary energy consumption.
Innovation Solution
A method and device for adaptive configuration of transmission signals in coherent WDM-PONs, where the number of lasers used is adjusted based on current traffic requirements by dynamically reassigning spectral ranges and switching off inactive lasers, utilizing adaptive mechanisms to optimize energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of lasers is increased to meet growing traffic requirements, then transmission capacity is improved, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts the number of active lasers based on real-time traffic load monitoring. When traffic demand decreases, lasers are switched off to reduce energy consumption. When traffic demand increases, additional lasers are activated to maintain transmission capacity. This dynamic adaptation resolves the contradiction between maintaining high transmission capacity and reducing energy consumption.
Solution Approach 2:
The invention changes the operational parameters of the laser system by adjusting the number of active lasers according to traffic requirements. The system monitors traffic load and modifies the configuration parameter (number of active lasers) to optimize the balance between transmission capacity and energy consumption, thereby resolving the technical contradiction.
2Use of energy by moving object
If lasers are switched off to reduce energy consumption, then energy efficiency is improved, but transmission capacity decreases
Solution Approach 1:
The system continuously monitors traffic load and dynamically adjusts the number of active lasers. When traffic demand is low, fewer lasers are activated to improve energy efficiency. When traffic demand increases, the system activates additional lasers to restore transmission capacity. This dynamic adjustment resolves the contradiction between energy efficiency and transmission capacity.
Solution Approach 2:
The invention implements a feedback mechanism where the system monitors traffic load and uses this information to control the activation state of lasers. The feedback loop ensures that transmission capacity is maintained when needed while enabling energy savings when traffic demand is low, thereby resolving the contradiction between energy efficiency and transmission capacity.
3Adaptability or versatility
If spectral ranges are reassigned dynamically, then adaptability to traffic requirements is improved, but system complexity increases
Solution Approach 1:
The invention makes the spectral ranges universally assignable to different lasers based on traffic requirements. Each spectral range can be dynamically assigned to any available laser, creating a multi-functional system that can adapt to various traffic patterns. This universality enables high adaptability while the standardized assignment mechanism keeps complexity manageable.
Solution Approach 2:
The system changes the assignment parameter (which laser handles which spectral range) dynamically based on traffic load and laser availability. By modifying this assignment parameter rather than the physical system structure, the invention achieves high adaptability to traffic requirements while minimizing the increase in system complexity.
Data Source
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AI summary
The present invention relates to a method and a device for the adaptive configuration of a transmission signal in a coherent WDM-PON having an optical line termination and several end nodes. The method comprises the following steps: a) producing the transmission signal by means of at least m lasers, which are each associated with a respective optical transmission spectrum having p associated spectral ranges, wherein a spectral range of the transmission signal is suitable for transmitting data in the coherent WDM-PON to an associated active end node of ka active end nodes, wherein a respective active end node of the ka active end nodes is associated with a spectral range of the m lasers and wherein ka <= m s p, m = {1,2,3,4,...}, and p = {1,2,3,4,...}; b) monitoring the number ka of active end nodes; c) reassigning each active end node associated with a spectral range of a laser to be switched off to a respective free spectral range of the remaining lasers if the number of active end nodes is reduced to ka <= (m - 1) - p; d) announcing the new assignment of the spectral ranges; and e) switching off the laser to be switched off.