Optical Loss Signal Glitch Filtering Without Delay
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Solution Overview
Problem
Existing methods for filtering glitches in optical signal loss signals in transceivers introduce time delays, causing instability and interruptions in communication systems.
Innovation Solution
A method and apparatus that set the online signal to a high level when the transceiver is plugged in or fails, start a timer, and reset it when the signal changes back to high, determining the signal as invalid until the timer reaches a preset time length, thereby eliminating the need for additional glitch filtering processing and avoiding time delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a delay module is added to filter glitches in the optical signal loss signal, then glitch filtering is achieved, but time delay is introduced causing signal instability
Solution Approach 1:
The patent applies preliminary action by setting the online signal to high level and starting a timer when the transceiver is first detected as online. This preliminary timing action establishes a validation window before the optical signal loss signal is processed, preventing glitches during the initialization phase without introducing continuous delay to valid signals.
Solution Approach 2:
The patent changes the parameter state of the online signal from low to high during the initialization period, and resets it after a preset time. This parameter change creates a temporal distinction between initialization signals and stable operation signals, allowing glitch filtering only when necessary without delaying valid signals.
2Measurement precision
If glitch filtering is applied to the optical signal loss signal, then signal accuracy is improved, but interruptions and instability increase due to delay processing
Solution Approach 1:
The patent applies preliminary anti-action by proactively setting the online signal to high level and starting the timer before any optical signal loss detection occurs during initialization. This preemptive measure prevents glitch-induced interruptions from occurring in the first place, rather than reacting to them after they cause instability.
Solution Approach 2:
The patent segments the signal processing into two distinct phases: an initialization phase (online signal high level) where glitches are expected and filtered, and a stable operation phase (online signal low level) where signals are processed normally. This segmentation allows precision improvement without compromising overall system stability.
3Measurement precision
If the online signal is delayed for clock cycle filtering, then glitch detection is improved, but the optical signal loss signal responsiveness deteriorates
Solution Approach 1:
The patent performs preliminary action by establishing the online signal state and timer before optical signal loss detection is needed. This ensures glitch detection is already in place during initialization without requiring additional delay when actual signal loss events occur during stable operation.
Solution Approach 2:
The patent makes the signal processing dynamic by changing the online signal state from high to low after initialization completes. This dynamic transition adapts the system's glitch filtering behavior based on the operational phase, maintaining detection precision during initialization while maximizing responsiveness during stable operation.
Data Source
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AI summary
Disclosed are a glitch filtering method and an apparatus for an optical signal loss signal. The present invention adopts a technical solution including: setting an online signal to a high level when detecting that the online signal output by a transceiver is changed from the high level to a low level, and starting a timer; setting the online signal to the high level when detecting that the online signal output by the transceiver is changed from the low level to the high level, and resetting the timer; and setting the online signal to the low level when time of the timer reaches a preset time length, wherein the optical signal loss signal of the transceiver is invalid when the online signal is set to the high level.