Network Communications Device Echo Cancellation Power Control

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Solution Overview

Problem

Ethernet connection quality deteriorates with increased network cable length or poor cable quality, failing to meet standards.

Innovation Solution

A network communications device equipped with transmitting and receiving units, echo cancellers, near-end crosstalk cancellers, decoding circuits, and a power-increasing control circuit to output and process signals, cancel echoes and crosstalk, and adjust operating power to maintain connection quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If network cable length is extended beyond 100 meters or poor quality cable is used to lower costs, then installation flexibility and cost are improved, but connection quality deteriorates and fails to conform with Ethernet standards

Engineering Contradiction:

Improvecable length flexibilityVSAvoidconnection quality

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system dynamically changes operating parameters including power levels and signal processing settings based on detected cable length and quality conditions. The controller adjusts transmission power and enables adaptive equalization to maintain connection quality despite extended cable lengths or poor cable quality

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements feedback mechanisms where the controller continuously monitors connection quality metrics and cable characteristics, then adjusts transmission parameters accordingly. This closed-loop control enables the system to adapt to varying cable conditions and maintain reliable connections

Inventive Principle:

Principle #23Feedback

2Area of stationary object

If network cable length is extended beyond 100 meters, then network coverage area is improved, but signal quality and connection reliability deteriorate

Engineering Contradiction:

Improvenetwork coverage areaVSAvoidsignal quality

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The system adjusts transmission power levels and signal processing parameters based on detected cable length. For extended cables, the controller increases power levels and activates adaptive equalization to compensate for signal degradation over distance, maintaining reliable connections across expanded coverage areas

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS8494032B2Network communications device capable of promoting connection quality and method thereof

Publication Date: 2013.07.23 REALTEK SEMICON CORP

AI summary

A network communications device is capable of promoting connection quality, and includes: a plurality of transmitting units for outputting a plurality of analog transmit-signals to another network communications device based on a plurality of digital transmit-signals; a plurality of receiving units for outputting a plurality of digital receive-signals based on a plurality of analog receive-signals sent from the another network communications device; an echo canceller for providing a signal for canceling an echo in one of the digital receive-signals; a near end crosstalk canceller for providing a signal for canceling near end crosstalk in one of the digital receive-signals; a decoding circuit for generating a decoded signal based on one of the digital receive-signals subsequent to cancellation of the echo and the near end crosstalk therein; and a power-increasing control circuit for increasing operating power so as to promote connection quality.