5G User Equipment LADN Connectivity Validation
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Solution Overview
Problem
The processing of control apparatuses for a 5G Core Network and user equipment registered with a Non-Public Network (NPN) is not clearly defined, particularly in scenarios where user equipment needs to connect to a Local Area Data Network (LADN).
Innovation Solution
A User Equipment (UE) is configured to receive a REGISTRATION ACCEPT message containing LADN information, which includes LADN service area details, and considers this information valid in its Standard-alone-Non-Public Network (SNPN) access mode, with the Tracking Area Identity (TAI) of the registered SNPN being part of the LADN service area information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LADN information is provided in REGISTRATION ACCEPT message, then connectivity to LADN is enabled, but processing clarity between control apparatus and user equipment is not defined
Solution Approach 1:
The patent applies local quality by making the UE validate LADN information specifically for SNPN TAI rather than all TAIs uniformly. The UE checks whether the TAI in the current registration request matches the TAI in the LADN information stored from REGISTRATION ACCEPT message, creating a localized validation rule that resolves the processing ambiguity.
Solution Approach 2:
The patent inverts the traditional approach by having the UE proactively validate whether LADN information is applicable to the current SNPN registration before the network requests LADN connectivity. Instead of waiting for network instructions, the UE independently determines validity by comparing TAI values, thus clarifying the processing sequence.
2Ease of operation
If UE operates in SNPN access mode, then specific network access is enabled, but LADN information validity determination is ambiguous
Solution Approach 1:
The patent applies preliminary action by having the UE store LADN information including TAI validation criteria during the REGISTRATION ACCEPT phase, before actual LADN connectivity is needed. This pre-stored information enables the UE to independently validate whether LADN services are available for the current SNPN registration without requiring real-time network consultation.
Solution Approach 2:
The patent implements self-service by enabling the UE to autonomously determine the validity of LADN information for SNPN access. The UE compares the TAI in its registration request against the stored LADN information TAI, making its own determination about LADN connectivity eligibility without needing additional network instructions or validation steps.
Data Source
AI summary
A communicator is provided that, in a 5GS, in a case that a User Equipment (UE) is registered with a Non-Public Network (NPN) and a Local Area Data Network (LADN) is connectable, allows the UE to appropriately process information of the LADN received from a control apparatus of a core network. Furthermore, the communicator also allows the control apparatus of the core network to perform appropriate error processing in a case that a UE is registered with a Non-Public Network (NPN) and a Local Area Data Network (LADN) is not connectable. Thus, provided is the communicator that, in 5GS, in a case that the UE is registered with the Non-Public Network (NPN) and the Local Area Data Network (LADN) is connectable, implements processing of the control apparatus of the core network and processing of the UE.