Terminal Authentication Flow for IP-Based Wireless Connection Setup

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Solution Overview

Problem

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

Innovation Solution

A computer program for a terminal device that sends IP address and public key to a communication device via a shared network, enabling authentication and connection establishment through a series of steps involving address and key exchanges.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If wired communication authentication using IP address is implemented, then authentication reliability is improved, but wireless connection establishment capability deteriorates

Engineering Contradiction:
Improveauthentication reliabilityVSAvoidwireless connection establishment capability
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent segments the authentication and connection establishment process into distinct phases: wired authentication phase (using IP address for reliability) and wireless connection phase (using MAC address for adaptability). This allows each phase to use the most appropriate communication method for its specific requirements.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The terminal device acts as an intermediary that bridges wired and wireless communication domains. It performs authentication via wired connection using IP address, then uses the authenticated session to establish wireless connections, thereby transferring the benefits of reliable wired authentication to wireless connectivity.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If detailed authentication methods for wired communication are specified, then authentication precision is improved, but documentation completeness for wireless communication deteriorates

Engineering Contradiction:
Improveauthentication precisionVSAvoiddocumentation completeness
Core Design Contradiction:
Measurement precisionVSLoss of information

Solution Approach 1:

The patent creates a universal authentication framework that works across both wired and wireless communication modes. The same authentication protocol and message formats are used regardless of whether the underlying transport is wired or wireless, eliminating the need for separate detailed specifications.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

Instead of specifying different authentication methods for wired and wireless communications, the patent inverts the approach by specifying a unified authentication method that can operate over either communication type. The communication type becomes a parameter of the transport layer rather than determining the authentication layer behavior.

Inventive Principle:
Principle #13The other way round (Inversion)

Data Source

PatentEP3917110B1Computer program for first terminal device performing a communication with a communication device
Publication Date: 2026.04.08 BROTHER KOGYO KK
  • EP3917110B1 patent drawingFigure 1
  • EP3917110B1 patent drawingFigure 2
  • EP3917110B1 patent drawingFigure 3

AI summary

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