Optical Splitter Port Detection Using Wavelength Combinations
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Solution Overview
Problem
The limitation of the monitoring wavelength range in passive optical networks (PON) systems prevents accurate determination of the connection relationship between optical network units (ONUs) and branch ports of optical splitters due to an insufficient number of wavelengths available for differentiation.
Innovation Solution
A method and apparatus that utilize a small quantity of distinct wavelengths to distinguish different branch ports of an optical splitter by determining port information based on optical power values, allowing for accurate connection relationships to be established between ONUs and branch ports using combinations of wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional monitoring wavelength range is used, then the system structure remains simple, but the connection relationship between ONUs and branch ports cannot be accurately determined due to insufficient wavelengths
Solution Approach 1:
The patent transitions from using a single wavelength dimension to using multiple wavelength dimensions for port detection. By employing M wavelengths (where M≥2) simultaneously, the system creates a multi-dimensional detection space that allows accurate identification of branch port connections without expanding the physical monitoring wavelength range. Each wavelength provides an additional dimension of information that contributes to distinguishing between different branch ports.
Solution Approach 2:
The patent segments the detection process into multiple wavelength channels. Instead of relying on a single monitoring wavelength, the system divides the detection function across M distinct wavelengths, with each wavelength contributing to the identification of specific branch port characteristics. This segmentation allows the system to overcome the limitation of insufficient wavelengths by distributing the detection task across multiple spectral channels.
2Measurement precision
If more wavelengths are allocated to distinguish different branch ports, then port detection accuracy improves, but the monitoring wavelength range limitation prevents sufficient wavelength allocation
Solution Approach 1:
The patent merges multiple wavelength detections into a unified port identification process. By combining the information from M different wavelengths, the system achieves accurate branch port distinction without requiring an expanded wavelength range. The merging of spectral information allows the system to effectively utilize a small quantity of wavelengths to distinguish a large number of branch ports through combinatorial detection patterns.
Solution Approach 2:
The patent makes each wavelength multi-functional by having it participate in the detection of multiple branch ports. Instead of dedicating one wavelength to one branch port, each of the M wavelengths serves multiple detection purposes, contributing to the identification of various branch port characteristics. This universal utilization of wavelengths maximizes the information extracted from a limited wavelength set.
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 enables accurate determination of connection relationships between ONUs and branch ports by using free combinations of a small number of wavelengths, overcoming the limitations of the monitoring wavelength range and ensuring efficient resource management in PON systems.
Implementation Method 1
each branch port of an optical splitter reflects an optical signal of a specific wavelength in the monitoring wavelength range
Data Source
AI summary
This application provides a port detection method and apparatus. In the technical solutions in this application, an OLT or an ONU may determine, based on at least two wavelengths and a preset correspondence, port information that is of an optical splitter and that corresponds to the ONU. That is, a branch port directly or indirectly connected to the ONU is defined by using the at least two wavelengths. In this way, different branch ports can be distinguished by using combinations of a plurality of wavelengths, to define a large quantity of branch ports of the optical splitter by using free combinations of a small quantity of wavelengths.