Mobile Terminal Network Disconnection for Unauthorized Access Prevention

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Solution Overview

Problem

In existing communication systems, control devices can be operated unauthorizedly by external terminals through a communication network, posing security risks, especially in sensitive environments like factory production facilities.

Innovation Solution

A communication system where a mobile terminal, operable by a user, connects to a control device via short-range wireless communication, disconnecting from the communication network when adjacent to the control device, thereby preventing unauthorized access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the mobile terminal maintains constant connection to the communication network, then data transmission and reception functionality is improved, but unauthorized operation by external terminals increases

Engineering Contradiction:

Improvedata transmission functionalityVSAvoidunauthorized operation

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The mobile terminal dynamically adjusts its network connection state based on proximity detection. When the control device is detected within a predetermined range, the mobile terminal automatically disconnects from the communication network, preventing unauthorized access while maintaining legitimate communication functionality when needed

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The mobile terminal acts as an intermediary between the control device and the communication network. It selectively establishes or disconnects the network connection based on the presence of the control device, thereby controlling whether external terminals can access the control device through the mobile terminal

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the mobile terminal disconnects from the communication network when adjacent to the control device, then unauthorized operation is prevented, but communication convenience is reduced

Engineering Contradiction:

Improveunauthorized operation preventionVSAvoidcommunication convenience

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The mobile terminal automatically detects the proximity of the control device and autonomously manages its network connection state without requiring manual user intervention. The system self-adjusts the connection status based on predetermined proximity conditions, balancing security and convenience automatically

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250039962A1Communication system, license management system, communication method, recording medium, and control device

Publication Date: 2025.01.30 MITSUBISHI ELECTRIC CORP

AI summary

A mobile terminal transmits information acquired from a license management server through the Internet to a license target device through near-field communication (NFC). The license target device receives the information from the mobile terminal through the NPC. An Internet connection controller in the mobile terminal disconnects connection to the Internet when the mobile terminal is adjacent to the license target device to establish connection to the license target device through the NPC.