UE SNPN Registration Using Valid SUPI Mapping Persistence
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Solution Overview
Problem
Challenges in effectively storing and managing 5G Mobility Management (5GMM) parameters in Standalone Non-Public Networks (SNPNs) due to invalid Subscriber Permanent Identifiers (SUPI) mappings, leading to subscription and SNPN selection issues, especially in multi-USIM scenarios, and the failure to persist forbidden SNPNs across power cycles.
Innovation Solution
A method and device for managing 5GMM parameters at User Equipment (UE) that involves selecting an SNPN identifier, determining the validity of the SUPI, retrieving a valid SUPI from the USIM, and updating lists with SNPN identifiers and parameters upon successful registration or registration rejection to avoid invalid mappings and resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 5GMM parameters are stored in non-volatile memory based on conventional mapping rules, then storage is achieved, but invalid SUPI associations occur leading to subscription and SNPN selection issues
Solution Approach 1:
The patent applies preliminary action by validating the SUPI before storing 5GMM parameters in non-volatile memory. The UE checks whether the SUPI is valid and properly configured before establishing the mapping relationship. This prevents invalid SUPI associations from being stored in the first place, thereby avoiding subscription and SNPN selection issues without requiring subsequent corrections.
2Productivity
If forbidden SNPNs are not saved across power cycles, then memory resources are preserved, but the UE repeatedly selects forbidden SNPNs causing operational delays
Solution Approach 1:
The patent applies local quality by selectively storing only the necessary forbidden SNPN information in non-volatile memory, rather than storing all SNPN data. The UE identifies and saves only those SNPNs that have been explicitly forbidden, preserving memory resources while preventing repeated selection of forbidden networks. This targeted approach ensures fast recovery after power cycles without wasting storage capacity.
3Ease of manufacture
If 5GMM parameters are stored without validating SUPI configuration, then storage operations are simplified, but subscription and SNPN selection failures occur
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously validate SUPI configuration before storing 5GMM parameters. The device performs self-checks to determine whether the SUPI is properly configured and valid, eliminating the need for complex external validation mechanisms. This self-validating approach maintains storage simplicity while significantly improving subscription and SNPN selection success rates.
Data Source
AI summary
A method for managing 5G Mobility Management (5GMM) parameters of a Standalone Non Public Network (SNPN) at a User Equipment (UE), the method includes selecting an SNPN identifier (SNPN ID) from among SNPN IDs in a first list, determining whether the first list includes a valid Subscriber Permanent Identifier (SUPI) for the SNPN ID, the first list including SNPN parameter values associated with the SNPN IDs, identifying a first SUPI from a first Universal Subscriber Identifier Module (USIM) of the UE in response to determining that the first list does not include the valid SUPI, generating a first SNPN registration request based on the SNPN ID and the first SUPI to attempt registration with a first SNPN associated with the SNPN ID, and updating a second list with the SNPN ID, the first SUPI, and a SNPN parameter value corresponding to the first SNPN upon successful registration.