Single Wire Interruption Detection in Vectoring Groups
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Solution Overview
Problem
Single wire interruptions in a vectored group can lead to disruptions in xDSL and G.fast connectivity, causing loss of service and potential connectivity issues across a neighborhood due to the vulnerability of vectoring systems to noise and crosstalk changes.
Innovation Solution
A method for detecting single wire interruptions in a line comprising two single wires, part of a vectoring group, by determining the overall capacitance and line capacitance, and identifying a single wire interruption based on a difference between these capacitances being less than a specified value, triggering predetermined actions such as notifications or adjustments in frequency range or power levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vectoring systems are used to provide xDSL and G.fast connectivity, then service coverage and connectivity are improved, but vulnerability to single wire interruptions and noise increases
Solution Approach 1:
The system performs preliminary detection of single wire interruptions by measuring capacitance values before service disruptions occur. The method calculates expected capacitance based on line length and compares it with actual measurements to identify interruptions early, allowing preventive actions to be taken before connectivity is lost
Solution Approach 2:
The system continuously monitors capacitance values and provides feedback about line conditions. When a single wire interruption is detected through capacitance measurement, the system generates alerts and can trigger corrective actions, creating a closed-loop monitoring system that improves reliability while maintaining high service coverage
2Reliability
If capacitance measurement is used to detect single wire interruptions, then detection accuracy is improved, but measurement precision requirements increase
Solution Approach 1:
The method transforms the detection problem from directly measuring small capacitance changes to comparing actual capacitance with expected capacitance calculated from line length. By changing the detection parameter from absolute capacitance difference to relative deviation from expected values, the system achieves high detection accuracy without requiring extremely precise absolute capacitance measurements
Solution Approach 2:
The system uses line length as an intermediary parameter to calculate expected capacitance values. Instead of directly comparing capacitance measurements to detect interruptions, the method uses line length information to establish what the capacitance should be, then compares actual measurements against this derived expectation, reducing the precision burden on direct capacitance measurements
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
The method effectively reduces the impact of single wire interruptions on vectoring groups by enabling early detection and triggering appropriate actions, thereby minimizing disruptions to xDSL and G.fast services and maintaining connectivity within the vectoring group.
Implementation Method 1
determining an overall capacitance measured between the two single wires of the line
Data Source
AI summary
It is suggested to detect a single wire interruption (SWI) of a line comprising two wires, wherein such line is part of a vectoring group, comprising (i) determining a capacitance between the single wires of the line; and (ii) determining whether a single wire interruption is present based on the determined capacitance.