Non-intrusive Network Diagnostics via Segmented PHY Loopback
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Solution Overview
Problem
Existing diagnostic tools, such as loopback testing, are intrusive and disruptive in live-field network environments, causing port downtime, traffic loss, and increased administration costs when diagnosing network equipment.
Innovation Solution
A non-intrusive monitoring and diagnostics system that decouples testing between transmit and receive paths, using configurable test packets with signatures within live traffic to monitor and diagnose network equipment without disrupting live traffic, thereby avoiding latency and jitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If loopback testing is used to diagnose network equipment ports, then diagnostic capability is improved, but port downtime and traffic loss occur
Solution Approach 1:
The patent segments the diagnostic process into two independent parts: transmitting test packets and receiving test packets. By using separate transmit and receive paths, the system can perform diagnostics on one path without affecting the other, allowing continuous network operation during testing
Solution Approach 2:
The patent introduces an intermediary mechanism where test packets with unique signatures are injected into the live traffic stream. These intermediary test packets allow diagnostic information to be carried within the existing traffic flow without disrupting normal network operations
2Reliability
If loopback testing is performed on live network ports, then connectivity verification is improved, but administration costs and complexity increase
Solution Approach 1:
The system implements self-service diagnostics where the network equipment automatically generates, transmits, and processes test packets without requiring manual configuration or intervention. The diagnostic engine autonomously manages the entire testing process, reducing administrative burden
3Ease of manufacture
If traditional diagnostic tools are used in live-field environment, then equipment testing is improved, but traffic loss and port downtime occur
Solution Approach 1:
The system dynamically adapts to live network conditions by continuously monitoring traffic patterns and adjusting test packet injection accordingly. The diagnostic process is made dynamic and flexible, allowing testing to proceed alongside normal traffic flow without causing loss
Solution Approach 2:
The patent enables continuous useful action by maintaining both normal network traffic and diagnostic testing simultaneously. The system ensures that testing operations continue without interruption to live traffic, and vice versa, achieving uninterrupted dual operation
Data Source
AI summary
A non-intrusive and operational communication system monitoring and diagnostics. Loopback-type testing is facilitated through testing that is split between transmit and receive sections. Transmit testing on a port can be based on test packets that are removed from the transmission path by a PHY upon detection. Receive testing on a port can be based on live traffic packets.