LADN DNN Authorization in 5G AMF Registration
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Solution Overview
Problem
In fifth-generation wireless communication systems (5GS), the Access and Mobility Management Function (AMF) lacks information on whether User Equipment (UE) is authorized to use Local Area Data Network (LADN) features and does not know the specific LADN Data Network Name (DNN) that the UE will use, hindering the provision of appropriate LADN information during registration procedures.
Innovation Solution
The UE indicates configured LADN DNNs during the initial registration procedure, and if changes occur, updates this information using a registration procedure, allowing the AMF to determine authorized LADN DNNs based on subscription profiles, and provides LADN information in a Registration Accept message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the AMF provides all configured LADN information to the UE during registration, then the UE can access LADN services, but the network security is compromised because unauthorized UEs could potentially access LADN services
Solution Approach 1:
The UE performs preliminary action by indicating its configured LADN DNNs during the initial registration procedure, allowing the AMF to pre-verify authorization before providing LADN information. This preliminary indication enables the network to authenticate the UE's LADN access rights in advance, preventing unauthorized access while ensuring authorized UEs can access services.
Solution Approach 2:
The AMF provides feedback by sending a Registration Accept message that includes LADN information only after verifying the UE's authorization. This feedback mechanism ensures that the UE receives LADN information only when authorized, creating a closed-loop security verification process that balances service accessibility with network security.
2Reliability
If the AMF verifies LADN authorization for each UE during registration, then network security is improved, but the registration procedure complexity increases
Solution Approach 1:
The UE performs self-service by autonomously indicating its configured LADN DNNs during registration without requiring complex network-side verification of each LADN configuration. The UE's own configuration data serves as the verification basis, simplifying the AMF's role to checking against subscription profiles rather than managing complex LADN authorization logic.
3Adaptability or versatility
If the AMF stores and processes LADN information for all UEs, then LADN service coverage is improved, but the AMF memory requirements and processing overhead increase
Solution Approach 1:
The patent extracts only the essential LADN DNN identifiers that the UE needs from the complete LADN configuration, rather than storing and processing all possible LADN information for every UE. The AMF retrieves and provides only the specific LADN DNNs relevant to each UE's subscription and current registration area, reducing memory requirements while maintaining service coverage.
Data Source
AI summary
Systems, apparatuses, methods, and computer-readable media are provided for indicating local area data network (LADN) data network names (DNNs). In embodiments, a user equipment (UE) provides a list of configured LADN DNNs in a registration request message during a registration procedure. An Access and Mobility Management Function (AMF) determines LADN information for the UE by looking into configured LADN DNNs in the AMF and/or retrieved LADN authorization/subscription information. The LADN information includes a list of LADN DNNs and corresponding LADN service area(s) that the UE can use, including LADN DNNs that the UE can use in a current registration area. The AMF sends the LADN information to the UE in a registration accept message. Other embodiments may be described and/or claimed.