Network Analyzer Impairment Detection for G.Fast Line Qualification
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Solution Overview
Problem
DSL network upgrades to G.Fast require prequalification of communication lines to ensure impairment-free copper loops for achieving theoretical bandwidth, as impairments like Bridge Taps, Degrade Contacts, and Abnormal Attenuations can impact signal quality and performance.
Innovation Solution
A method and network analyzer that assess the loop length and presence of impairments in the communication line, using Dual End Line Testing and Single End Line Testing to classify lines as qualified or not qualified for G.Fast upgrades, focusing on the terminal section for potential fiber insertion points, without requiring field intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If G.Fast technology is deployed to provide high bandwidth (hundreds of Mb/s to 1 Gb/s), then the data transmission capacity is improved, but the copper loop length must be limited to 300m or 500m maximum which restricts service coverage area
Solution Approach 1:
The patent applies preliminary action by performing impairment detection and line qualification assessments before deploying G.Fast service. The system evaluates the terminal section of copper loops for impairments (bridge taps, degraded contacts, abnormal attenuations) and pre-identifies suitable lines for G.Fast upgrade, ensuring that only qualified lines are selected for high-speed service deployment, thus avoiding later service failures due to line impairments
2Reliability
If impairment detection and location methods are implemented to ensure line quality for G.Fast, then the service reliability is improved, but the device complexity and testing requirements increase
Solution Approach 1:
The patent implements self-service by enabling the network infrastructure itself to perform impairment detection and line qualification. The access node and network analyzer automatically evaluate the terminal section of copper loops for impairments using existing network resources and signaling protocols, eliminating the need for separate field testing equipment and manual assessments. The system self-identifies suitable lines for G.Fast deployment through automated procedures
3Measurement precision
If Dual End Line Testing and Single End Line Testing are performed to locate impairments, then the measurement precision of impairment location is improved, but the loss of time for testing and evaluation increases
Solution Approach 1:
The patent applies preliminary action by performing impairment detection as a preliminary step before G.Fast deployment. The system proactively identifies and locates impairments in the terminal section using Dual End Line Testing and Single End Line Testing, storing the results for future reference. This preliminary assessment prevents time loss during actual service deployment, as line qualification is completed in advance
Solution Approach 2:
The patent implements skipping by using automated testing procedures that rapidly evaluate multiple lines in parallel. The system efficiently performs impairment detection and location without manual intervention, rushing through the evaluation process to minimize testing time while maintaining measurement precision through automated Dual End and Single End Line Testing methods
Data Source
AI summary
The method includes obtaining a loop length of a terminal section of the communication line; determining whether there is an impairment in the communication line; if no impairment, classifying the communication line into the first group; if impairment is determined, perform obtaining a location of the impairment in the communication line; determining whether the impairment is located in the terminal section of the communication line based on the loop length; if so, classifying the communication line into a second group; else, classifying the communication line into the first group; wherein, in the first group, it is qualified for an new broadband communication service, and if in the second group, it is not qualified, and wherein, the new broadband communication service is to be deployed over the terminal section of the communication line.