Access Network Node AMF Selection for UAV Authentication
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Solution Overview
Problem
The challenge in the 5G system is unclear how an Access Network (AN) selects an Authentication Management Function (AMF) during the Uncrewed Aerial Vehicle Authentication and Authorization in Mobility Management (UUAA-MM) procedure, and how the AMF and User Equipment (UE) behave when the Uncrewed Aerial System (UAS) Service Supplier (USS) is not found.
Innovation Solution
The proposed solution involves an Access Network node that receives information from core network nodes about UUAA-MM procedure support and from User Equipment (UE) about initiation requests. The node then selects an appropriate core network node supporting UUAA-MM and transmits a message requesting the initiation of the UUAA-MM procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the AN selects an AMF without clear selection criteria for UUAA-MM procedure, then the AMF selection process is simple, but the authentication and authorization procedure for UAV cannot be properly performed
Solution Approach 1:
The patent applies preliminary action by having the AMF indicate its UUAA-MM procedure support capability to the AN in advance, before the actual UAV authentication is needed. This allows the AN to pre-know which AMFs can handle UUAA-MM, making the selection process reliable when a UE initiates such a procedure.
Solution Approach 2:
The patent introduces the AN as an intermediary between the UE and the AMF. The AN receives capability information from AMFs, stores this information, and uses it to make informed routing decisions. This intermediary role resolves the contradiction by adding a layer of intelligence that ensures proper AMF selection without making the overall system complex.
2Reliability
If the AN stores capability information from all core network nodes, then the AMF can be correctly selected, but the information storage and management becomes more complex
Solution Approach 1:
The patent applies local quality by having the AN store capability information in a structured manner, organizing it by AMF identifier and specific capability (UUAA-MM support). This localized organization allows efficient retrieval and management without requiring complex global information management systems.
3Productivity
If the AN transmits messages to initiate UUAA-MM procedure, then the authentication process can start, but the signaling overhead increases
Solution Approach 1:
The patent reduces signaling overhead by performing preliminary actions - the AN already has stored capability information from previous interactions, so when a UE needs UUAA-MM, the AN can immediately identify a suitable AMF without requiring additional capability inquiry messages. This eliminates redundant signaling while maintaining efficient authentication initiation.
Data Source
AI summary
An object is to provide an apparatus, a method, and a program that contribute to an selecting an AMF to support UUAA-MM functionality in the UUAA-MM procedure. An access network node receives from a core network node information indicating whether authentication and authorization procedure for an UAV (UUAA-MM procedure) in mobility management is supported, receive from a UE information indicating an initiation request for the UUAA-MM procedure, and transmit a message requesting initiation of the UUAA-MM procedure to a core network node supporting the UUAA-MM procedure among the core network nodes. This allows the access network node to properly select the core network node that supports the UUAA-MM procedure.