Optical Line Terminal Receiver Power Control
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Solution Overview
Problem
In optical line terminals (OLTs) connected to multiple optical network units (ONUs) via passive optical networks (PONs), there is a significant wastage of standby electricity as the receiver remains active even when no upstream signals are received, leading to inefficiencies in power consumption.
Innovation Solution
Implementing a power control mechanism where the OLT converts upstream optical signals into electric signals, derives control signals, and uses a controller to generate power control signals that switch the receiver's power supply on or off based on allocated bandwidth periods, ensuring power is only supplied during signal reception and not during surplus or idle periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiver remains active continuously to receive upstream signals from ONUs, then the reliability of signal reception is improved, but the power consumption increases due to unnecessary standby electricity usage during idle periods
Solution Approach 1:
The receiver is operated periodically rather than continuously. The power control signal switches the receiver between active and standby states based on whether upstream signals are expected during allocated time slots. This periodic operation reduces power consumption while maintaining reliable signal reception when needed.
Solution Approach 2:
The receiver's operational state is made dynamic rather than static. The system adapts the receiver's state (active or standby) based on real-time conditions and allocated bandwidth periods, optimizing the balance between reception reliability and power consumption.
2Use of energy by moving object
If the receiver is switched off during idle periods to save power, then the power consumption is reduced, but the ability to receive signals immediately when needed may be compromised
Solution Approach 1:
The system performs preliminary actions by allocating time slots and notifying ONUs in advance about when the receiver will be active. This allows the receiver to be switched off during guaranteed idle periods while ensuring it is active when signals are expected, maintaining reception capability without continuous operation.
Solution Approach 2:
The system uses feedback mechanisms where the OLT controller manages the receiver's operation based on allocated bandwidth information and signal reception patterns. This feedback loop ensures the receiver is activated at appropriate times to maintain reliability while minimizing power consumption during idle periods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach minimizes standby electricity consumption by ensuring the receiver is only powered during allocated time slots, thereby reducing overall power usage and operational costs.
Implementation Method 1
a receiver for converting an upstream optical signal, received from the optical network unit, into a corresponding upstream electric signal
Data Source
AI summary
In an optical line terminal connectable to optical network units in an optical communication network, an receiver converts an upstream optical signal, received from an optical network unit, into a corresponding upstream electric signal and then derives an upstream control signal controlling the optical line terminal from the upstream electric signal. A controller generates a power control signal switching on or off power supply to the receiver on the basis of the upstream control signal, and a power feeder switches on or off the power supply to the receiver in response to the power control signal. Thus, the optical line terminal can reduce the waste of standby electricity.