Terminal Authentication Flow for IP-Based Wireless Pairing

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Solution Overview

Problem

Existing technologies do not provide detailed methods for establishing wireless connections between communication devices using IP addresses beyond wired communication authentication.

Innovation Solution

A computer program for a terminal device that facilitates the exchange of IP addresses and public keys between communication devices over a communication network to establish wireless connections, utilizing a communication interface for authentication and connection setup.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If wired communication authentication using IP address is implemented according to DPP scheme, then authentication between terminal device and communication device can be executed, but detailed methods for other types of communication using IP address (such as wireless connection establishment) are not provided

Engineering Contradiction:
Improvecommunication method versatilityVSAvoidcommunication method details
Core Design Contradiction:
Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent uses the existing wired communication authentication mechanism as an intermediary to enable wireless connection establishment. The terminal device first authenticates with the communication device via wired communication to obtain connection information, which then serves as a mediator to establish the wireless connection without requiring separate detailed protocols for wireless setup.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If manual device selection is required for wireless connection establishment, then connection security can be maintained, but operation complexity and time consumption increase

Engineering Contradiction:
Improveconnection securityVSAvoiddevice selection process
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent performs preliminary authentication and connection information exchange through wired communication before wireless connection establishment. This preliminary action includes the terminal device sending an authentication request, receiving authentication response with connection information, and storing this information for later wireless connection use, thereby eliminating the need for manual device selection during wireless setup.

Inventive Principle:
Principle #10Preliminary action

3Ease of operation

If wireless connection establishment process is simplified, then ease of operation improves, but the need for detailed authentication and connection management protocols increases system complexity

Engineering Contradiction:
Improvewireless connection setupVSAvoidauthentication and connection management
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent extracts the complex authentication and connection management processes from the wireless connection establishment phase and places them in the wired communication phase. By separating these functions into distinct phases, the wireless connection setup becomes simple while the complex protocols are handled separately during initial wired authentication.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentEP3917109B1Computer program for first terminal device performing a communication with a communication device
Publication Date: 2026.02.18 BROTHER KOGYO KK
  • EP3917109B1 patent drawingFigure 1
  • EP3917109B1 patent drawingFigure 2
  • EP3917109B1 patent drawingFigure 3

AI summary

A first terminal device may receive first address information which is a first IP address of the first communication device from the first communication device by using a communication network to which the first terminal device and a first communication device belong, and a first public key of the first communication device. The first terminal device may send a first authentication request in which the first public key is used to the first communication device with the first address information as a destination, and send first connection information to the first communication device with the first address information as a destination in a case where a first authentication response is received from the first communication device. The first connection information may be used by the first communication device to establish a first wireless connection between the first communication device and an external device.