PON OLT Wavelength Tuning for ONU Power Reduction
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Solution Overview
Problem
In multiple-wavelength passive optical networks (PONs), the power consumption of optical network units (ONUs) is a significant concern due to the use of tunable optical modules that consume more power than fixed-wavelength modules, especially in next-generation PONs that employ multiple transmission wavelengths to increase network capacity.
Innovation Solution
The solution involves an optical line terminal (OLT) that collects power consumption data from ONUs operating on various wavelength channels, selects a target wavelength channel with lower power consumption, and sends a tuning control message to the ONU to switch to that channel, thereby reducing overall power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple-wavelength channels are used to increase network capacity, then bandwidth and network capacity are improved, but power consumption of ONUs increases
Solution Approach 1:
The patent implements dynamic wavelength channel selection where ONUs can tune between different wavelength channels based on traffic conditions and power consumption characteristics. The system dynamically adjusts the operating wavelength to balance network capacity requirements with power consumption, allowing ONUs to switch to lower-power wavelengths when full capacity is not needed while maintaining the ability to access multiple wavelengths when high capacity is required.
2Adaptability or versatility
If tunable optical modules are used in ONUs to support multiple wavelengths, then adaptability and network flexibility are improved, but power consumption increases
Solution Approach 1:
The patent changes the operating parameter (wavelength channel) of the optical modules based on power consumption data. The system collects power consumption information for different wavelength channels and selectively tunes the optical module to wavelengths that provide adequate performance with lower power consumption, thereby reducing overall power usage while maintaining adaptability through the ability to switch between channels.
3Use of energy by moving object
If wavelength tuning is implemented to reduce power consumption, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where power consumption data from different wavelength channels is collected and used to make intelligent tuning decisions. The OLT receives power consumption reports from ONUs, processes this information, and sends tuning control messages to optimize wavelength selection. This feedback-driven approach automates the complexity of wavelength management, reducing the need for manual configuration while achieving power savings through data-driven optimization.
Data Source
AI summary
An optical line terminal (OLT) comprising a processor configured to process a first power consumption data associated with a first optical network unit (ONU) for a plurality of wavelength channels in a multiple-wavelength passive optical network (PON), and select a first target wavelength channel from the plurality of wavelength channels based on the first power consumption data in order to reduce power consumption at the first ONU, and a transmitter coupled to the processor and configured to transmit to the first ONU a tuning control message instructing the first ONU to tune to the first target wavelength channel.