Relay Node Signal Flattening via Intensity Classification
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Solution Overview
Problem
In optical communication systems, the intensity difference between optical signals from user devices accommodated in the same relay node cannot be flattened without reducing the optical signal-to-noise ratio (OSNR), leading to issues with gain saturation and waveform degradation.
Innovation Solution
Classify user devices by their optical signal intensities into a minimum number of classes to ensure similar intensities within each class, and then set a signal transmission path to converge these signals in the same optical transmission line, adjusting their intensities collectively without separating them for each wavelength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical signals from user devices with different intensities are transmitted through the same relay node, then the relay node can serve multiple users, but the intensity difference causes gain saturation and waveform degradation
Solution Approach 1:
The patent segments user devices into multiple classes based on their optical signal intensities. User devices are classified into first user devices (stronger signals) and second user devices (weaker signals), allowing differential handling of signal intensities while maintaining relay node capacity for multiple users
Solution Approach 2:
The patent applies different signal processing characteristics to different user device classes. By identifying local quality differences in signal intensity, the system can optimize transmission parameters for each class separately, preventing gain saturation in strong signals while ensuring sufficient signal level for weak signals
2Length of moving object
If optical amplifiers are used to compensate for signal intensity decrease, then long-distance transmission is enabled, but amplified spontaneous emission degrades signal reception characteristics
Solution Approach 1:
The patent performs preliminary classification of user devices by signal intensity before signal transmission. By pre-identifying which users have stronger or weaker signals, the system can configure transmission parameters in advance to prevent ASE degradation while enabling long-distance transmission for all users
Solution Approach 2:
The patent introduces an intermediary classification mechanism that mediates between the optical amplifier and the user devices. This intermediary layer (the classification system) allows the amplifier to operate effectively for long-distance transmission while the classification information enables subsequent signal processing to compensate for ASE effects
3Reliability
If signal intensity is kept high to avoid ASE influence, then reception characteristics are maintained, but waveform degradation due to nonlinear optical effects occurs
Solution Approach 1:
The patent changes the parameter of signal intensity handling by classifying users into different intensity groups. Instead of uniformly maintaining high signal intensity for all users, the system adjusts intensity parameters differentially, allowing weak signals to remain above ASE threshold while preventing strong signals from causing nonlinear effects
Data Source
AI summary
A signal intensity flattening method includes: classifying a plurality of user devices accommodated in the same relay node so that user devices with similar optical signal intensities are in the same class; and setting a signal transmission path for converging optical signals transmitted from user devices of the same class in the same optical transmission line, and adjusting the signal intensities of the optical signals converged in the same optical transmission line collectively without separating them for each wavelength.