Transmission Control Apparatus for Access Network Frequency Management

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Solution Overview

Problem

In copper wire bundle cable environments, crosstalk between xDSL equipment and Giga Internet devices leads to performance degradation, making it difficult to provide high-speed Internet services, especially when multiple devices share the same frequency band.

Innovation Solution

A method for controlling transmission frequency in access networks by setting a partial frequency band for customer premise devices based on contract speed, subscriber line state, and traffic amount, and varying this band when triggering events occur, such as changes in adjacent line usage or increased traffic, using a low pass filter to adjust the frequency band and signal strength.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If multiple xDSL equipments share the same frequency band in a bundle cable environment, then device complexity is reduced and ease of operation is improved, but crosstalk increases and transmission performance deteriorates

Engineering Contradiction:

Improveease of operationVSAvoidcrosstalk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent divides the service frequency band into multiple sub-bands and allocates different sub-bands to different subscriber lines. This frequency domain segmentation reduces crosstalk between multiple xDSL equipments sharing the same bundle cable, while maintaining the simplicity of the shared infrastructure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic frequency band allocation where the transmission frequency band is varied based on triggering events such as traffic amount changes or adjacent line usage changes. This dynamic adjustment optimizes performance while managing crosstalk in the shared frequency environment.

Inventive Principle:

Principle #15Dynamics

2Speed

If the transmission frequency band is expanded to provide higher speeds, then transmission speed is improved, but crosstalk between subscriber lines increases and performance degradation worsens

Engineering Contradiction:

Improvetransmission speedVSAvoidcrosstalk

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The service frequency band is segmented into multiple sub-bands, and different sub-bands are allocated to different subscriber lines based on their traffic demands and performance requirements. This allows high-speed transmission for some lines without causing excessive crosstalk to other lines.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the transmission frequency band parameter dynamically based on triggering events. When traffic amount or adjacent line usage changes, the frequency band is adjusted to optimize the balance between transmission speed and crosstalk management.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If a fixed frequency band is used for all subscriber lines, then device complexity is minimized, but transmission performance cannot be optimized for individual subscriber needs

Engineering Contradiction:

Improvedevice complexityVSAvoidtransmission performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent implements a dynamic frequency allocation mechanism where the transmission frequency band is automatically adjusted based on triggering events such as traffic amount changes or changes in adjacent line usage. This dynamic approach optimizes transmission performance for each subscriber line without requiring complex manual configuration.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system monitors triggering events related to traffic amount and adjacent line usage, and uses this feedback information to dynamically adjust the frequency band allocation. This feedback mechanism ensures optimal transmission performance while maintaining manageable system complexity.

Inventive Principle:

Principle #23Feedback

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 approach optimizes high-speed Internet service delivery by minimizing crosstalk and ensuring transmission speeds match subscribed products, even in environments with shared frequency bands, thereby enhancing network performance and user experience.

Implementation Method 1

using a low pass filter to adjust the frequency band and signal strength

Methodology Applied

Scientific EffectLow pass filter: Filter (electronic)

Data Source

PatentUS10666317B2Method and apparatus of transmission control for providing internet service in access network

Publication Date: 2020.05.26 KT CORP

AI summary

Disclosed is a method for performing transmission frequency control for a subscriber line of a customer premise device by a transmission control apparatus in an access network structure in which at least one network management device and a plurality of customer premise devices are connected through a bundle cable including a plurality of subscriber lines. The transmission control method includes: setting a partial frequency band in an entire service frequency band provided by the subscriber line as a transmission frequency band of the customer premise device; and varying the transmission frequency band in the entire service frequency band when a triggering event occurs, in which traffic of the customer premise device is transmitted and received in the transmission frequency band.