Communication Network Termination Apparatus for Selective Signal Restriction

Solution Overview

Problem

In communication systems using the FM conversion scheme, adding out-of-area retransmission channels or community-dedicated channels is challenging due to difficulties in inserting signals into existing frequency bands, leading to inefficient system construction and increased costs.

Innovation Solution

A communication network termination apparatus that includes a reception processing unit, an output control unit, a disturbing signal generation unit, and a multiplexing unit, which generates and superimposes a disturbing signal on specific frequency bands to degrade signal quality, allowing for selective restriction of signal reproduction in individual receivers without encryption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If encryption is used to restrict signal reproduction, then security is improved, but system complexity and cost increase

Engineering Contradiction:

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the signal restriction function from encryption mechanisms and implements it through direct signal quality degradation. The communication network termination apparatus generates disturbing signals that selectively degrade the quality of specific frequency bands, allowing restriction without encryption. This removes the need for complex encryption/decryption systems while achieving the same restriction goal.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent converts the harmful effect of signal interference into a beneficial restriction mechanism. By injecting disturbing signals that degrade quality, the system achieves selective signal restriction. This transforms what would normally be a harmful interference problem into a useful restriction tool, eliminating the need for encryption systems.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Adaptability or versatility

If out-of-area retransmission channels are added, then service coverage is improved, but system construction difficulty increases

Engineering Contradiction:

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent introduces dynamic control of signal quality based on user location and service requirements. The communication network termination apparatus can dynamically adjust which frequency bands receive disturbing signals, enabling flexible addition of out-of-area retransmission channels without physical system reconfiguration. This dynamic approach simplifies system construction compared to static encryption systems.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of signal quality rather than using fixed encryption parameters. By adjusting the quality degradation level and frequency band selection, the system can adapt to different service requirements and add new channels dynamically. This parameter-based approach makes system construction easier compared to encryption-based solutions.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If frequency bands are allocated for multiple channels, then service capacity is improved, but signal interference increases

Engineering Contradiction:

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality degradation by targeting specific frequency bands with disturbing signals rather than degrading all signals uniformly. The communication network termination apparatus selectively degrades only the quality of frequency bands corresponding to channels that should be restricted for particular users. This localized approach allows high service capacity while managing interference through intelligent selection rather than avoiding frequency allocation.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12267151B2Communication network terminating device, communication system, signal jamming method and signal jamming program

Publication Date: 2025.04.01

AI summary

An apparatus includes a reception processing unit configured to output a frequency division multiplexed signal obtained from a transmission signal transmitted over the wired communication network, an output control unit configured to output, in a case that apparatus identifying data matches signal specifying data, a frequency band specifying data indicating a frequency band corresponding to the signal specifying data, the apparatus identifying data being for requesting signal quality degradation, and the signal specifying data specifying a carrier signal requesting signal quality degradation among a plurality of carrier signals included in the frequency division multiplexed signal, a disturbing signal generation unit configured to generate a disturbing signal in a frequency band corresponding to the frequency band specifying data output by the output control unit, and a multiplexing unit configured to multiplex the frequency division multiplexed signal and the disturbing signal to output.