ONU Optical Module Power Saving via Extended OAM Frames
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Solution Overview
Problem
Passive Optical Network (PON) systems face challenges in power saving and emission reduction due to continuous operation of optical modules in Optical Network Units (ONUs) even when no data stream is present, leading to unnecessary power consumption.
Innovation Solution
A method and system for managing power saving mechanisms between ONUs and Optical Line Terminals (OLTs through extended Operation Administration and Maintenance (OAM) frames, where power saving information is passed and used to control the opening and closing of optical modules, implementing states like fast-sleep, deep-sleep, doze, and cyclic-sleep to reduce power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical module of the ONU keeps opening/closing to perform normal data communication with the OLT according to standard Ethernet PON definition, then data communication functionality is maintained, but power is consumed in vain when no data stream is present
Solution Approach 1:
The patent applies dynamics by enabling the optical module to transition between different operational states (normal operation state and power saving state) based on real-time data stream detection. The system dynamically adjusts the optical module's operation from continuous opening/closing to selective activation only when data is present, thereby reducing unnecessary power consumption while maintaining communication functionality when needed
Solution Approach 2:
The patent changes the operational parameter of the optical module from continuous operation mode to state-dependent operation mode. By introducing power saving states (doze state, fast-sleep state, deep-sleep state) with different levels of operational activity, the system optimizes power consumption based on actual data traffic conditions while preserving the ability to communicate when required
2Speed
If the optical module remains continuously open to ensure immediate data transmission, then data communication speed is maintained, but power consumption increases unnecessarily
Solution Approach 1:
The patent implements periodic action through multiple power saving states that periodically activate the optical module based on data presence. Instead of continuous operation, the system uses periodic activation patterns where the optical module remains closed during power saving states and opens only when data streams are detected, achieving a balance between transmission speed and power consumption
Solution Approach 2:
The system dynamically adjusts the optical module's operational state based on real-time data stream detection. When data is present, the optical module transitions to normal operation state for immediate transmission; when no data is present, it transitions to power saving states. This dynamic adaptation maintains transmission speed when needed while significantly reducing power consumption during idle periods
Data Source
AI summary
The disclosure provides a method and system for realizing power saving mechanism management between an Optical Network Unit (ONU) and an Optical Line Terminal (OLT). The method includes: passing power saving information between the ONU and the OLT through an extended Operation Administration and Maintenance (OAM) frame; closing/opening an optical module of the ONU based on the obtained power saving information. With the method of the disclosure, the optical module is closed in time when the optical module of the ONU is not needed, thus reducing power consumption of the ONU, and enabling interaction between the ONU and the OLT to meet the requirement for power saving and emission reduction.