Uplink Optical Signal Power Detection Using Fixed Duration Triggering
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Solution Overview
Problem
Existing methods for detecting uplink optical signal power in GPON systems suffer from poor accuracy and repeatability due to varying uplink bandwidths, which can lead to bit errors and system instability if not addressed in time.
Innovation Solution
Generating triggering signals of the same duration for each uplink optical signal to be detected, allowing for consistent charging time by a charging circuit, thereby improving the accuracy and repeatability of power measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the triggering signal duration is made equal to the uplink signal duration to enable power detection, then power detection capability is achieved, but measurement precision deteriorates because uplink bandwidths vary causing inconsistent charging times
Solution Approach 1:
The patent changes the parameter of triggering signal duration from being variable (matching each uplink signal's duration) to being fixed (standardized duration). This allows the RC circuit to charge for a consistent time period, improving measurement precision while still enabling power detection across different uplink bandwidth scenarios through the fixed duration threshold comparison.
2Adaptability or versatility
If the triggering signal duration is extended to cover all uplink signals, then detection coverage is improved, but loss of time increases due to waiting for longer charging periods
Solution Approach 1:
By standardizing the triggering signal duration to a fixed value, the patent optimizes the balance between detection coverage and time consumption. The fixed duration is set to be sufficient for detecting various uplink signal power levels while avoiding excessive waiting time, thus improving efficiency compared to variable duration approaches.
3Reliability
If the RC circuit charging time is extended to ensure complete charging, then detection reliability is improved, but productivity decreases due to slower detection speed
Solution Approach 1:
The patent adopts a fixed triggering signal duration that is optimized to provide sufficient charging time for reliable detection while maintaining fast detection speed. This standardized duration ensures the RC circuit charges adequately for accurate power measurement without introducing excessive delay, thus balancing reliability and productivity.
4Adaptability or versatility
If different triggering signal durations are used for different uplink bandwidths, then adaptability is improved, but device complexity increases due to need for dynamic duration adjustment
Solution Approach 1:
The patent simplifies the system by changing the triggering signal duration parameter from dynamic (adjusted per uplink bandwidth) to fixed (standardized value). This eliminates the need for complex duration adjustment mechanisms while still achieving effective power detection across different bandwidth scenarios through the fixed threshold comparison approach.
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 enhances the accuracy and repeatability of uplink optical signal power measurement, enabling timely detection of power issues and maintaining network robustness by ensuring consistent detection time across varying uplink bandwidths.
Implementation Method 1
a detecting module which includes a current mirror RSSI detection branch and a logarithmic amplifier RSSI detection branch, where the current mirror RSSI detection branch and the logarithmic amplifier RSSI detection branch are respectively coupled to the receiving module, and is configured to measure, according to a received RSSI function trigger signal, an RSSI of an optical signal received by the receiving module
Data Source
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AI summary
The present invention discloses a method and an apparatus for detecting power of an uplink optical signal, an optical line terminal, and an optical network system. The method includes: separately generating a triggering signal that is used for detecting optical power for each uplink optical signal among multiple uplink optical signals to be detected, where the triggering signal of each uplink optical signal has same duration; and separately detecting power of each uplink optical signal in the duration of the triggering signal of each uplink optical signal. According to the method and the apparatus for detecting power of an uplink optical signal, the optical line terminal, and the optical network system, triggering signals with same duration are generated for different uplink optical signals to be detected, so that time for charging performed by a charging circuit used to detect optical power is the same and fixed, and therefore accuracy and repeatability for measuring power of an uplink optical signal can be improved.