Network Cable Fault Localization via TDR and Zone Mapping
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Solution Overview
Problem
Existing network cabling fault detection systems struggle to accurately pinpoint the physical location of cable faults within complex network installations, as they primarily provide distance measurements that are not sufficient for identifying the precise location of faults in facilities with intricate cable routing.
Innovation Solution
A system that integrates a network switch with a cable diagnostic test function and a network integrity monitor, which uses fault-distance measurements correlated with cabling information from a database to identify the affected cable segment and fault location, and displays this information on a display device, enabling technicians to navigate directly to the fault.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If TDR testing is used to measure cable fault distance, then fault detection capability is improved, but the ability to pinpoint physical location deteriorates due to complex cable routing
Solution Approach 1:
The patent segments the cable path information by dividing the facility into multiple zones and creating separate cable route maps for each zone. This allows the system to process complex cable routing information in manageable segments, correlating TDR measurements with specific zone segments to improve physical location identification.
Solution Approach 2:
The patent introduces cable route maps and zone information as intermediary data structures that bridge the gap between TDR fault distance measurements and physical cable locations. These intermediaries contain pre-stored cable path information that enables correlation between measured fault distances and actual physical locations in the facility.
2Measurement precision
If technicians manually trace cables to locate faults, then physical location accuracy is improved, but repair time increases significantly
Solution Approach 1:
The patent performs preliminary actions by pre-mapping cable routes through the facility and storing this information in zone-based cable route maps before faults occur. This advance preparation eliminates the need for manual cable tracing during fault repair, as the system can immediately correlate TDR measurements with pre-stored location information, significantly reducing repair time.
Solution Approach 2:
The system enables self-service fault location by automatically correlating TDR fault distance measurements with stored cable route information to identify fault locations without requiring technician intervention for manual cable tracing. The automated correlation process eliminates time-consuming manual procedures while maintaining accurate fault location identification.
3Measurement precision
If detailed cable route mapping is implemented across the entire facility, then fault location identification is improved, but system complexity increases
Solution Approach 1:
The patent reduces system complexity by segmenting the facility into multiple zones, each with its own cable route map. This modular approach allows the system to manage detailed cable routing information in smaller, more manageable units rather than requiring a single complex facility-wide map, making the system more scalable and easier to maintain.
Solution Approach 2:
The patent organizes cable route information in a hierarchical structure with multiple dimensions: facility-level zone definitions and zone-specific cable route maps. This multi-dimensional organization allows the system to access detailed cable location information only at the relevant zone level, reducing the complexity of data management while maintaining precise fault location identification capabilities.
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 solution allows for precise identification and localization of cable faults, facilitating quicker repair and reducing downtime by providing technicians with accurate location information within complex network environments.
Implementation Method 1
Diagnostic test functionalities, such as those that provide Time Domain Reflectivity (TDR) testing, may be integrated into network switch ports and used to determine the length of cable between a network switch port where the cable is connected, and the point on the cable where a fault has occurred.
Data Source
AI summary
Systems and methods for automated network cabling integrity monitoring are provided. In one embodiment a system manager for a network that includes a network switch coupled to patching equipment comprises: at least one processor configured to execute software, the software comprising a network integrity monitor. The network integrity monitor controls a cable diagnostic test function to obtain a fault-distance measurement for a port of the switch. The network integrity monitor correlates the fault-distance measurement with network cable length information associated with the switch port to identify one or both of a network cable segment associated with the fault-distance measurement and a fault location. The cable length information is retrieved from a database. The network integrity monitor produces an output identifying of one or both of the network cable segment associated with the fault-distance measurement and the fault location to be displayed on a display device.