AMF Node UUAA Procedure Collision Handling

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

There are issues related to authentication and re-authorization procedures for Uncrewed Aerial Systems (UAS) Service, particularly in handling collisions between UAV Authentication and Authorization (UUAA) procedures and other mobility or session management procedures.

Innovation Solution

The proposed solution involves an Access and Mobility Management Function (AMF) node that initiates a UUAA-MM procedure, receives a DEREGISTRATION REQUEST message, aborts the UUAA-MM procedure, and proceeds with the de-registration procedure. Similarly, a Session Management Function (SMF) node initiates a UUAA-SM procedure, receives a PDU SESSION RELEASE REQUEST message, aborts the UUAA-SM procedure, and proceeds with the PDU session release procedure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the AMF node continues the UUAA-MM procedure after receiving a DEREGISTRATION REQUEST message, then authentication and authorization are maintained, but the de-registration procedure fails

Engineering Contradiction:

Improveauthentication reliabilityVSAvoidde-registration efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The AMF node dynamically adjusts its behavior based on the type of message received. When a DEREGISTRATION REQUEST message is detected, the AMF aborts the UUAA-MM procedure and allows the de-registration to proceed. This dynamic response resolves the contradiction by making the system adaptable to different operational contexts.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The AMF node uses feedback from the DEREGISTRATION REQUEST message to modify its ongoing UUAA-MM procedure. The feedback mechanism allows the AMF to detect the de-registration intent and accordingly abort the authentication procedure, ensuring both authentication reliability when needed and de-registration efficiency when requested.

Inventive Principle:

Principle #23Feedback

2Reliability

If the SMF node continues the UUAA-SM procedure after receiving a PDU SESSION RELEASE REQUEST message, then authentication and authorization are maintained, but the session release procedure fails

Engineering Contradiction:

Improveauthentication reliabilityVSAvoidsession release efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The SMF node dynamically responds to the PDU SESSION RELEASE REQUEST message by aborting the UUAA-SM procedure and allowing the session release to complete. This dynamic adjustment resolves the contradiction between maintaining authentication reliability and achieving session release efficiency.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The SMF node incorporates feedback from the PDU SESSION RELEASE REQUEST message to modify its UUAA-SM procedure accordingly. This feedback mechanism ensures that authentication is maintained when needed while enabling efficient session release when requested by the UE.

Inventive Principle:

Principle #23Feedback

3Productivity

If the AMF node aborts the UUAA-MM procedure upon receiving a DEREGISTRATION REQUEST message, then the de-registration procedure succeeds, but authentication and authorization are lost

Engineering Contradiction:

Improvede-registration efficiencyVSAvoidauthentication reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system segments the authentication and de-registration processes into distinct phases. The AMF node identifies when to abort the UUAA-MM procedure based on the DEREGISTRATION REQUEST message, allowing de-registration to proceed while maintaining authentication integrity for ongoing sessions. This segmentation resolves the contradiction by separating the two opposing requirements.

Inventive Principle:

Principle #1Segmentation

4Productivity

If the SMF node aborts the UUAA-SM procedure upon receiving a PDU SESSION RELEASE REQUEST message, then the session release succeeds, but authentication and authorization are lost

Engineering Contradiction:

Improvesession release efficiencyVSAvoidauthentication reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The SMF node segments the session management and authentication processes, allowing it to abort the UUAA-SM procedure when a PDU SESSION RELEASE REQUEST is detected. This segmentation enables efficient session release while preserving authentication reliability for active sessions, resolving the contradiction between the two requirements.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250142510A1AMF node, UAV, SMF node, method, and non-transitory computer readable medium

Publication Date: 2025.05.01 NEC CORP

AI summary

An object is to provide an apparatus, a method, and a program that can appropriately handle a collision between a UUAA procedure and other mobility or session management procedures. An Access and Mobility Management Function (AMF) node initiates a UAV Authentication and Authorization (UUAA-MM) procedure, receive a DEREGISTRATION REQUEST message in a UE-initiated de-registration procedure from an Uncrewed Aerial Vehicle (UAV), abort the UUAA-MM procedure in response to the receipt of the DEREGISTRATION REQUEST message, and proceed with the UE-initiated de-registration procedure when the AMF node receives the DEREGISTRATION REQUEST message. This allows the AMF to appropriately handle a collision between, for example, the UUAA procedure and other mobility management procedures.