Vectoring Coefficient Update for DSL Port Stability
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Solution Overview
Problem
In telecommunication systems, vectoring algorithms often propagate faults within a vectoring group, leading to ineffective crosstalk cancellation and performance degradation across all subscriber lines, resulting in unnecessary port retrains, as existing remediation techniques focus on individual port performance rather than identifying and addressing the root cause of multiport retrain events.
Innovation Solution
A method is introduced to recognize multiport retrain events by analyzing retrain information and identifying the root cause port, which is associated with a fault or defect, allowing for differentiated configuration changes to non-defective ports to improve communication performance across the vectoring group by updating vectoring coefficients and applying tailored repair profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual port remediation techniques are applied, then specific problem ports can be stabilized, but multiport retrain events caused by root cause faults cannot be effectively addressed
Solution Approach 1:
The patent segments the remediation process by first identifying the root cause port among multiple affected ports, then applying differentiated repair profiles. Instead of treating all ports uniformly, the system divides them into root cause ports and victim ports, applying specific remediation actions to each segment based on their role in the retrain event.
Solution Approach 2:
The patent inverts the traditional remediation approach by not starting with individual problem ports, but rather identifying the root cause port first through correlation analysis of retrain events. This inversion allows the system to address the source of the problem rather than treating symptoms across multiple ports.
2Reliability
If vectoring algorithms are used to cancel crosstalk, then signal quality improves, but faults in one subscriber line propagate to other lines in the vectoring group
Solution Approach 1:
The patent introduces an intermediary analysis layer that monitors retrain events and identifies root cause ports before faults propagate through the vectoring group. This intermediary detection mechanism allows the system to isolate and address faults at their source, preventing them from affecting other subscriber lines through the vectoring algorithm.
3Reliability
If remediation sequences are implemented to reduce retrains, then port performance improves, but configuration changes may be applied unnecessarily to non-defective ports
Solution Approach 1:
The patent applies local quality by assigning different repair profiles to different port types. Root cause ports receive one type of configuration change, while victim ports receive different or no changes. This localized approach ensures that configuration modifications are applied only where necessary, reducing unnecessary complexity in configuration management.
Data Source
AI summary
Multiple ports of a vectored digital subscriber line (DSL) system can be automatically reconfigured to respond to a fault or defect associated with another one of the ports of the system. Information regarding retrain events for the ports of the system can be examined to identify the “bad” port with the associated fault or defect and the corresponding group of ports affected by the bad port. The affected group of ports can be identified as a group of ports that all were retrained within a predetermined time period and for common retrain reasons (e.g., 1 or 2 different retrain reasons). Once the affected group of ports is identified, the affected group of ports and the bad port can receive corresponding repair profiles to reconfigure the ports to respond to the fault or defect.