Network Layout Planning for Fault Isolation Cost-Risk Tradeoffs
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Solution Overview
Problem
Apparatus network systems with a multi-drop scheme face challenges in identifying fault locations due to potential differences, signal-to-noise ratio degradation, and complex construction environments, leading to extensive troubleshooting efforts and limited operator knowledge in resolving construction defects.
Innovation Solution
A network construction support system that includes layout data generation, index value calculation, and layout data judging units to determine the appropriate placement of construction assisting tools, balancing cost and risk to facilitate fault identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If construction assisting tools are increased to narrow down fault locations, then troubleshooting efficiency is improved, but system cost increases
Solution Approach 1:
The system segments the network into multiple sections by strategically placing construction assisting tools at specific locations. Each tool divides a section into smaller sub-sections, enabling systematic fault isolation. The segmentation continues until fault locations can be precisely identified, balancing the number of tools with troubleshooting effectiveness.
Solution Approach 2:
The system performs preliminary layout planning of construction assisting tools before actual fault occurrence. By pre-calculating optimal tool placement positions based on network topology and fault propagation characteristics, the system prepares the network structure in advance to minimize troubleshooting time when faults occur, rather than adding tools reactively.
2Measurement precision
If construction assisting tools are placed to narrow down fault ranges, then fault identification precision is improved, but device complexity increases
Solution Approach 1:
The system applies local quality by placing construction assisting tools only at specific critical locations rather than uniformly throughout the network. Each tool is positioned where it provides maximum fault isolation value, creating non-uniform tool distribution that optimizes precision while minimizing overall complexity. The layout adapts to local network characteristics and fault propagation patterns.
3Ease of manufacture
If the network topology is made flexible with free branching, then workability is improved, but fault propagation risk increases
Solution Approach 1:
Construction assisting tools serve as intermediary devices in the network topology. These tools act as mediators that can isolate fault propagation by controlling signal flow between different network segments. The intermediary devices enable flexible network construction while providing mechanical or electronic isolation capabilities to prevent faults from spreading throughout the entire system.
Data Source
AI summary
A network construction support system (100) generates one or more pieces of layout data (101) indicating a layout of construction assisting tools (140). The network construction support system calculates a countermeasure cost and an estimated risk amount, for each layout data, the countermeasure cost increasing as a number of units of construction assisting tools increases, the estimated risk amount decreasing as the number of units of construction assisting tools increases and as a narrowed range by each construction assisting tool narrows. The network construction support system judges an appropriateness of the layout data for the apparatus network system, for each layout data, on the basis of a countermeasure cost, an estimated risk amount, and an allowable risk amount which is allowed for the apparatus network system, The network construction support system outputs layout data judged to be appropriate for the apparatus network system.