AI Network Function Re-Authentication Using AIFSAI

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Solution Overview

Problem

In the 5G system, there is a need for a re-authentication-authorization method for AI network functions to ensure security and stability, as AI network functions require regular re-authentication and authorization to maintain safe and stable service provision.

Innovation Solution

A re-authentication-authorization method is provided through a network slice-specific authentication and authorization function (NSSAAF) that receives and performs re-authentication-authorization requests based on AI function selection assistance information and user equipment identifiers, involving network elements like AAA-S, UDM, and AMF to ensure secure and stable operation of AI network functions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If AI network function performs regular re-authentication and authorization, then security is improved, but system complexity and operational overhead increase

Engineering Contradiction:

ImprovesecurityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces an AI function selection assistance information (AIFSAI) mechanism that acts as an intermediary to streamline the re-authentication process. The NSSAAF network element uses AIFSAI to efficiently identify and re-authenticate AI network functions without requiring complex manual intervention, thus maintaining security while reducing operational complexity

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system performs preliminary actions by maintaining AIFSAI records that include identification information of AI network functions. This pre-prepared information enables faster re-authentication processes, reducing the complexity and time required for regular security checks while maintaining reliable security verification

Inventive Principle:

Principle #10Preliminary action

2Reliability

If AI network function performs regular re-authentication and authorization, then security is improved, but time consumption increases

Engineering Contradiction:

ImprovesecurityVSAvoidtime consumption

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system pre-establishes AIFSAI records containing AI network function identification information before re-authentication is needed. This preliminary preparation allows the NSSAAF to quickly retrieve and verify function identities during regular security checks, significantly reducing the time consumption of re-authentication while maintaining security

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses identification information copies (AIFSAI) that reference the actual AI network functions. These copied identification records enable rapid re-authentication by comparing against pre-stored information, reducing the time required for security verification without compromising security integrity

Inventive Principle:

Principle #26Copying

3Reliability

If AI network function requires re-authentication for each regular check, then security is improved, but operational efficiency decreases

Engineering Contradiction:

ImprovesecurityVSAvoidoperational efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The AIFSAI mechanism serves as an intermediary that automates the re-authentication process. The NSSAAF network element uses AIFSAI to automatically identify and verify AI network functions during regular checks, eliminating manual intervention and improving operational efficiency while maintaining security requirements

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system enables self-service re-authentication where the NSSAAF automatically performs verification using pre-stored AIFSAI information. This automated self-service approach handles regular security checks without requiring external intervention, improving operational efficiency while maintaining security standards

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250358285A1Re-authentication authorization method/apparatus/device for ai network function, and storage medium

Publication Date: 2025.11.20 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A re-authentication-authorization method is performed by a network slice-specific authentication and authorization function (NSSAAF) network element and includes: receiving a re-authentication-authorization request sent by an authentication and authorization server (AAA-S) network element, where the re-authentication-authorization request includes AI function selection assistance information (AIFSAI) and a first identifier used for identifying a user equipment (UE) served by the AI network function; and performing re-authentication-authorization on the AI network function based on the AIFSAI and the first identifier.