Forbidden SNPN List Segmentation for Localized Service Access
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Solution Overview
Problem
Existing wireless communication systems face challenges in enabling user equipment (UE) to discover, select, and access non-public networks (NPNs) providing localized services, particularly in areas where access is restricted or time-bound, without proper mechanisms for managing forbidden network lists and validity information.
Innovation Solution
The UE maintains an original forbidden SNPN list applicable for SNPNs without validity information and a new forbidden SNPN list applicable for localized services with validity information, and each entry in the original list can be associated with an optional localized service flag or indication to manage access to NPNs providing localized services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single forbidden SNPN list is used for all network access, then the device complexity is reduced, but the ability to manage localized service access with validity information deteriorates
Solution Approach 1:
The patent divides the single forbidden SNPN list into two separate lists: one for general SNPN access control and another for localized service access control. This segmentation allows independent management of each access type, enabling the system to handle validity information and access restrictions for localized services without affecting general network access mechanisms.
Solution Approach 2:
The patent introduces localized service-specific attributes (validity information, service area restrictions, time restrictions) that apply only to localized service access control, while general SNPN access control maintains its original simplicity. This local quality differentiation allows tailored access control policies for different service types.
2Measurement precision
If separate forbidden lists are maintained for localized services, then the access control precision is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the localized service access control logic and data structures from the general SNPN access control mechanism. By separating the forbidden lists and their management procedures, the system achieves precise control over localized service access while isolating the complexity into dedicated components that can be managed independently.
Solution Approach 2:
The patent performs preliminary classification of SNPNs into those providing localized services and those that don't, before access control decisions are made. This preliminary action allows the system to apply appropriate access control rules in advance, improving precision while organizing complexity systematically.
3Reliability
If the UE checks all forbidden lists for every network selection, then the access control reliability is improved, but the network selection speed deteriorates
Solution Approach 1:
The patent implements dynamic list selection in the network selection process. The UE determines whether to check the localized service forbidden list based on whether the target SNPN provides localized services and whether the service is currently enabled. This dynamic approach maintains reliability by checking appropriate lists while improving speed by avoiding unnecessary checks.
Solution Approach 2:
The system uses feedback from service enablement status and SNPN service type identification to dynamically adjust the network selection process. When localized services are disabled or the SNPN doesn't provide them, the system feedback mechanism prevents checking the localized service forbidden list, thereby maintaining reliability while enhancing selection speed.
Data Source
AI summary
A method of forbidden SNPN list handling for localized services is provided. In a first embodiment, an original forbidden SNPN list is maintained and is applicable for SNPN/GIN without validity information, and a new forbidden SNPN list is maintained and is applicable for SNPN/GIN with validity information for localized services. If a selected SNPN is associated with validity information, then UE checks whether the selected SNPN belongs to the new forbidden SNPN list. In a second embodiment, the original forbidden SNPN list is maintained and is extended with optional localized service Flag/Indication. Each entry in the original forbidden SNPN list can be associated with an optional localized service Flag or Indication. If a selected SNPN is associated with validity information, then UE checks whether the selected SNPN belongs to the original forbidden SNPN list with a localized service Flag/Indication.