Bonded Loop Anomaly Diagnosis via Echo Analysis
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Solution Overview
Problem
Diagnosing loop anomalies in long-distance subscriber loops is challenging due to signal attenuation and noise, often requiring costly 'truck rolls' to customer premises for diagnostic testing, as existing diagnostic equipment struggles to locate and identify anomalies, especially those close to the customer premises.
Innovation Solution
Implementing loop diagnostic logic at both the central office and customer premises to perform diagnostic tests on bonded loops, where test information is communicated through other bonded loops, allowing for remote anomaly detection and reporting, utilizing echo analysis and echo canceler techniques to determine anomaly location and type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If loop diagnostic equipment at the central office transmits test signals along the loop to detect anomalies, then anomaly detection capability is provided, but signal attenuation and noise prevent reliable detection of anomalies, especially those close to customer premises
Solution Approach 1:
The patent introduces a customer premises equipment (CPE) with diagnostic capabilities as an intermediary device. The CPE transmits test signals back to the central office through the same bonded loops, enabling anomaly detection without requiring strong signals to travel the full distance from CO to anomaly point and back. This intermediary approach overcomes the limitation of signal attenuation and noise that prevent reliable anomaly detection, particularly for anomalies close to customer premises.
2Measurement precision
If technician visits (truck rolls) are sent to customer premises for diagnostic testing, then accurate anomaly diagnosis can be performed, but operational cost and time are significantly increased
Solution Approach 1:
The patent implements self-service by equipping customer premises equipment with loop diagnostic logic that can autonomously perform diagnostic tests on bonded loops. The CPE transmits test signals and processes reflections locally, then communicates results back to the central office. This eliminates the need for technicians to travel to customer premises for routine diagnostic testing, significantly reducing operational costs and response time while maintaining accurate anomaly detection capabilities.
3Ease of operation
If existing loop diagnostic equipment is used, then some anomalies can be detected, but the equipment cannot reliably diagnose anomalies close to customer premises due to signal degradation
Solution Approach 1:
The patent inverts the traditional diagnostic approach by having the customer premises equipment transmit test signals back to the central office through the bonded loops, rather than having the central office transmit signals to detect anomalies. This inversion allows the test signals to originate from the end closest to the anomaly (customer premises), ensuring strong signal strength for detecting near-end anomalies while the central office receives the reflected signals with full diagnostic capability.
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
Enables remote detection and reporting of loop anomalies, reducing the need for costly technician visits by allowing network service providers to identify and address issues without sending technicians to customer premises, improving communication reliability and reducing operational burdens.
Implementation Method 1
equipment for diagnosing a loop anomaly typically transmits a test signal along the loop under test and measures the test signal's reflections
Data Source
AI summary
The present disclosure generally pertains to systems and methods for diagnosing loop anomalies for bonded-loop communication media. In one exemplary embodiment of the present disclosure, a communication medium comprises a plurality of bonded loops that couple network communication equipment (e.g., communication equipment at a central office) to customer premises (CP) communication equipment residing at a customer premises. If communication occurring over one of the loops becomes significantly degraded (e.g., if the SNR of the loop falls below a predefined threshold or id communication across the loop is interrupted), then loop diagnostic logic at the customer premises performs a diagnostic test on the loop. Information indicative of the diagnostic test is then communicated to the network equipment via one of the other bonded loops. Thus, the network service provider is able to receive information indicative of the diagnostic test without having to send a technician to the customer premises.