Universal Cable Modem Test Harness Architecture

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Solution Overview

Problem

Current testing systems for cable modems lack the capability to efficiently and simultaneously test multiple devices of different types for various network interfaces and functionalities, such as DOCSIS device registration and data throughput, voice over IP connections, and throughput speeds, while providing real-time monitoring and control.

Innovation Solution

A universal testing system comprising a test station with Faraday cages, test servers, and virtualization containers that can connect and test multiple devices simultaneously, utilizing MOCA LAN and WAN harnesses, RF splitters, and FXO servers to conduct comprehensive tests on devices including DOCSIS, WiFi, LAN, WAN, and VOIP connections, with real-time user interface communication through web sockets.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional testing systems are used for cable modems, then testing can be conducted for individual device functions, but multiple devices of different types cannot be tested simultaneously and efficiently

Engineering Contradiction:

Improvetesting efficiencyVSAvoidmulti-device testing capability

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The test server is designed with universal test interfaces and virtualization containers that can adapt to test multiple types of devices (cable modems, gateways, set-top boxes) simultaneously. The system provides a unified testing platform that handles different device types through standardized interfaces while maintaining device-specific test capabilities.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The testing system is divided into separate functional modules including Faraday cages for RF testing, MOCA LAN/WAN harnesses for network connectivity testing, FXO servers for voice testing, and virtualization containers for software-based testing. This segmentation allows each module to specialize in specific test functions while working together to test multiple devices simultaneously.

Inventive Principle:

Principle #1Segmentation

2Reliability

If comprehensive tests are conducted on various network interfaces and functionalities, then testing coverage is improved, but system complexity increases

Engineering Contradiction:

Improvetesting coverageVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Virtualization containers act as intermediaries between the test server and devices under test, providing standardized communication interfaces and test execution environments. These containers abstract the complexity of different device types and test protocols, allowing comprehensive testing through unified interfaces while managing system complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Multiple testing functions (RF testing, network connectivity testing, voice testing, data throughput testing) are merged into a single integrated test server platform. This consolidation provides comprehensive testing coverage while reducing overall system complexity by eliminating the need for separate dedicated testing systems for each function.

Inventive Principle:

Principle #5Merging (Combining)

3Measurement precision

If real-time monitoring and control is implemented, then testing accuracy is improved, but resource consumption increases

Engineering Contradiction:

Improvereal-time monitoring accuracyVSAvoidsystem resource consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

Physical measurement and monitoring systems are replaced with software-based virtualization containers that run on the test server. These virtual environments provide real-time monitoring and control capabilities through software rather than hardware, improving measurement precision while reducing physical resource consumption and enabling more efficient resource utilization.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 simultaneous and independent testing of multiple devices across various interfaces, providing comprehensive test results and real-time monitoring, improving the efficiency and effectiveness of cable modem testing.

Implementation Method 1

A test station includes a plurality of Faraday cages/test slots for testing devices

Methodology Applied

Scientific EffectFaraday cage: Faraday Cage

Data Source

PatentUS12155552B2Hardware architecture for universal testing system: cable modem test

Publication Date: 2024.11.26 CONTEC LLC

AI summary

A hardware architecture for a universal testing system used for performing tests on cable modem devices (DUT) is disclosed. According to certain embodiments, a CMTS test harness enables the DUT to respond to test phone calls from the MOCA interface and which test phone calls terminate at the DUT's phone port.