Parent-Child Terminal Authorization for Contract-Free Network Access

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Solution Overview

Problem

In future communication systems like 6G, connecting multiple devices purchased at an electrical appliance store, such as VR goggles or AR glasses, to a network is difficult due to the need for separate subscriber contracts and potential bottlenecks from tethering via smartphones.

Innovation Solution

An authorization apparatus that receives a communication system use authorization request from a network node, obtains consent from a parent terminal, and transmits authorization information to allow unregistered devices to connect, using OIDC CIBA and CAPIF frameworks to generate subscriber-equivalent data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional network connection methods are used for multiple devices, then network security and proper authentication are maintained, but it becomes difficult to connect devices without separate subscriber contracts and tethering via smartphones

Engineering Contradiction:
Improveease of device connectionVSAvoidcomplexity of connection procedure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent divides the connection authorization process into distinct segments: parent terminal registration, child terminal registration, and authorization delegation. The parent terminal's network credentials are segmented and selectively shared with specific child terminals through controlled authorization, enabling easy connection without full contract repetition for each device.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary authorization mechanism where the parent terminal acts as a mediator between the network and child terminals. The parent terminal receives and manages authorization information, then selectively grants connection permissions to child terminals, simplifying the connection process while maintaining security through this intermediate layer.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If separate subscriber contracts are required for each device, then network authentication and billing are properly managed, but the process becomes cumbersome for multiple devices

Engineering Contradiction:
Improveauthentication reliabilityVSAvoidtime for contract setup
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent implements preliminary action by having the parent terminal register and obtain network authorization information in advance. This pre-obtained authorization is then reusable for multiple child terminals, eliminating the need for time-consuming separate contract setups while maintaining authentication reliability through the pre-validated parent terminal credentials.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent creates a universal authorization mechanism where a single parent terminal's network credentials and authorization information can serve multiple child terminals. This multi-functional approach allows one authorized terminal to enable connections for several devices without requiring individual contracts for each, reducing setup time while maintaining security.

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

3Adaptability or versatility

If tethering via smartphone is used to connect devices, then network access is achieved, but performance bottlenecks occur

Engineering Contradiction:
Improveflexibility of connection methodVSAvoiddata transmission rate
Core Design Contradiction:
Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent extracts the network authorization and authentication functions from the smartphone tethering process. By separating these critical functions and implementing them directly in the child terminals through the parent terminal's authorization delegation, the system eliminates the smartphone as a mandatory intermediary, removing the performance bottleneck while maintaining connection flexibility.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent implements a copying mechanism where the parent terminal's network authorization information and credentials are securely copied and transferred to child terminals. This allows child terminals to independently authenticate with the network using copied authorization data, eliminating the need for tethering through the parent terminal and thereby removing the performance bottleneck associated with tethering.

Inventive Principle:
Principle #26Copying

Data Source

PatentEP4668817A1Approval device, communication system, and communication method
Publication Date: 2025.12.24 NTT DOCOMO INC
  • EP4668817A1 patent drawingFigure 1
  • EP4668817A1 patent drawingFigure 2
  • EP4668817A1 patent drawingFigure 3

AI summary

An authorization apparatus includes: a reception unit configured to receive a communication system use authorization request from a network node apparatus based on a registration request sent from a second terminal for which a first terminal acts as a parent; a control unit configured to, based on an identifier of the second terminal contained in the communication system use authorization request, obtain from a data storing apparatus an identifier of the first terminal and, using the identifier of the first terminal, obtain from the first terminal information indicating that consent has been obtained for the second terminal to connect to the network; and a transmission unit configured to transmit authorization information that authorizes the second terminal to use a communication system, based on the consent and on condition that the second terminal is authenticated.