UE Manual Network Selection for Localized Service Access Control
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Solution Overview
Problem
Current wireless communication systems face challenges in enabling User Equipment (UE) to discover, select, and access Non-Public Networks (NPNs) providing localized services, particularly in ensuring access control and validity criteria are met for Standalone Non-Public Networks (SNPNs) and Public Network Integrated NPNs (PNI-NPNs) with Closed Access Groups (CAGs).
Innovation Solution
A method for enhanced manual network selection mode is proposed, where UE presents validity information and criteria to users for SNPNs and CAGs, allowing authorized access by configuring UE with validity information and prioritizing networks based on time and location restrictions, ensuring compliance with access rules for localized services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If UE automatically selects NPN for localized services, then network access speed is improved, but access control security deteriorates because UE may select unauthorized networks
Solution Approach 1:
The system performs preliminary actions by pre-configuring the UE with validity information (time windows, location areas) and CAG identifiers before network selection. The UE proactively checks whether candidate NPNs match the stored validity criteria and authorized CAG lists, preventing unauthorized access before it occurs rather than relying solely on post-selection authentication.
Solution Approach 2:
The system implements feedback mechanisms where the network provides validity information and CAG configurations to the UE, and the UE continuously monitors whether current network selections satisfy these criteria. The UE receives feedback from the network about authorized access groups and validates its selections against this feedback, creating a closed-loop control system that maintains both speed and security.
2Ease of operation
If UE presents all available NPN options to user, then user selection capability is improved, but device complexity increases due to validity checking and filtering requirements
Solution Approach 1:
The system applies partial action by selectively presenting only those NPN options that satisfy the validity criteria (time, location, CAG authorization) to the user, rather than filtering out all non-compliant options. This approach provides sufficient information for user decision-making while avoiding the complexity of exhaustive validation of every possible network option.
Solution Approach 2:
The system segments the network selection process into distinct stages: first filtering networks based on CAG authorization, then checking validity criteria (time windows, location areas), and finally presenting the filtered results to the user. This segmentation breaks down the complex validation task into manageable sub-tasks, reducing overall device complexity while maintaining comprehensive control.
3Reliability
If UE restricts access to authorized NPNs only, then network security is improved, but adaptability deteriorates because UE cannot access new or temporary localized services
Solution Approach 1:
The system implements dynamic adaptability through time-validity windows and location-area restrictions that can be updated without changing the fundamental security framework. The UE can dynamically adjust its access behavior based on current time, location, and received configurations, allowing it to access new localized services when validity criteria permit while maintaining security constraints. The validity information itself can be updated by the network to accommodate new services.
Data Source
AI summary
A method of enhanced manual network selection mode for access localized services in NPN is proposed. If an SNPN is available and included in the UE-stored configuration for SNPN selection, the UE presents to the user whether the SNPN is associated with validity information and whether the corresponding validity criteria are met. If a CAG cell in a PLMN broadcasting a CAG-ID is available and included in the (Allowed) CAG list of the UE-stored CAG related configuration of the PLMN, the UE presents to the user whether the CAG-ID is associated with validity information and whether the corresponding validity criteria are met, e.g., whether the CAG-ID is authorized based on the (Allowed) CAG list.