Passive Entry Adapter for CATV Networks

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

MoCA passive devices using Point of Entry (PoE) filters restrict the frequency spectrum for broadband network signals, requiring frequent replacements when the frequency spectrum expands, leading to inconvenience and significant costs.

Innovation Solution

An external MoCA band rejection filter is used outside the customer's premise, allowing for passive splitting and combining of network signals without a fixed filter at the PoE, and a diplex filter with high-pass and low-pass terminals to attenuate low-frequency broadband signals, preventing MoCA-only signals from escaping the internal network.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If MoCA passive devices use internal filters to isolate the internal home network from cable network signals, then MoCA-only signals are prevented from escaping the home network, but the frequency spectrum seen by broadband equipment is restricted, requiring frequent filter replacements when frequency spectrum expands

Engineering Contradiction:

Improveisolation of MoCA signalsVSAvoidfrequency spectrum adaptability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The filter function is extracted from the customer premises equipment and placed in a remote location outside the home network. The remote filter isolates MoCA signals from the cable network while allowing broadband equipment to access the full frequency spectrum without restriction, eliminating the need for frequent filter replacements at customer sites.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If MoCA-only devices transmit with high output power, then communication reliability within the internal network is improved, but signals can unintentionally escape to external networks via broadband connection

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidsignal leakage

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

A remote filter acts as an intermediary between the home network and the cable network. It allows high-power MoCA-only signals to communicate reliably within the internal network while blocking these signals from escaping to external networks via the broadband connection, thus eliminating signal leakage without reducing transmission power.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-generated harmful factors

If filters are installed at the Point of Entry to prevent MoCA signals from escaping, then external network contamination is prevented, but broadband equipment frequency spectrum is restricted

Engineering Contradiction:

Improvenetwork contamination preventionVSAvoidfrequency spectrum utilization

Core Design Contradiction:

Object-generated harmful factorsVSUse of energy by moving object

Solution Approach 1:

The filtering function is segmented from the customer premises and relocated to a remote position outside the home. This segmentation allows the filter to protect against network contamination while enabling broadband equipment to utilize the full frequency spectrum without restriction, as the filter no longer resides in the path of broadband signals at the customer site.

Inventive Principle:

Principle #1Segmentation

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 solution prevents MoCA-only signals from reaching external networks, maintains the frequency spectrum within the customer's premises, and allows for easy replacement of filters without on-site changes, reducing costs and maintenance efforts.

Implementation Method 1

a frequency-based signal separation device connected to a first terminal, the frequency-based signal separation device comprising a high-pass terminal, and a low-pass terminal

Methodology Applied

Scientific EffectFrequency-based signal separation: Filter (electronic)

Implementation Method 2

an external band rejection filter configured to be connected to an external network; an entry adapter connected to the external band rejection filter

Methodology Applied

Scientific EffectBand rejection filtering: Filter (electronic)

Data Source

PatentUS11627282B2Passive entry adapter system for a CATV network

Publication Date: 2023.04.11 PPC BROADBAND INC

AI summary

A passive entry adapter system includes an external band rejection filter connected to an external network; an entry adapter connected to the external band rejection filter, an input port connecting the entry adapter to the external network; a directional coupler connected to the input port; a frequency-based signal separation device connected to a first terminal and comprising a high-pass terminal, and a low-pass terminal; a splitter connected to the high-pass terminal, where the splitter is configured to be connected to one or more first types of devices; and a broadband output port connected to a second terminal of the directional coupler. The broadband output is configured to be connected to one or more second types of devices. The entry adapter and the external band rejection filter are configured to prevent signals from a frequency band associated with in-network communications produced within an internal network from reaching the external network.