AMF NTN Access Restriction Enforcement
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Solution Overview
Problem
Existing network configuration mechanisms lack the capability to comprehensively enforce access restrictions on User Equipment (UE) in Non-Terrestrial Network (NTN) environments, leading to suboptimal network utilization, potential service disruptions, and increased complexity.
Innovation Solution
A method and system for configuring an Access and Mobility Management Function (AMF) to enable restrictions on UE access to a Public Land Mobile Network (PLMN) in NR, by receiving and transmitting specific restriction information and configuring the AMF accordingly to manage NTN access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing network configuration mechanisms are used for NTN access management, then device complexity is reduced, but access restriction enforcement capability is insufficient
Solution Approach 1:
The patent introduces a dedicated AMF configuration mechanism that acts as an intermediary between the network and UE for managing NTN access restrictions. This configuration mechanism receives restriction information from network elements, processes it according to predefined rules, and translates it into UE-executable commands, thereby enabling reliable access control without overcomplicating the overall system architecture
Solution Approach 2:
The patent modifies existing AMF configuration parameters by adding specific NTN-related restriction parameters (such as restricted location information, time restrictions, and service type limitations). These parameter extensions allow the AMF to enforce access restrictions through existing communication protocols without requiring fundamental architectural changes
2Productivity
If comprehensive access restrictions are implemented in NTN, then network utilization is improved, but ease of operation is reduced
Solution Approach 1:
The patent enables UE autonomous decision-making by configuring it with access restriction information and local execution capabilities. The UE automatically evaluates its current location, time, and service requirements against the received restriction rules and autonomously determines whether to establish or terminate connections, eliminating the need for continuous manual network control while optimizing network utilization
Solution Approach 2:
The patent implements preliminary configuration of access restriction rules and UE capabilities before actual access attempts. By pre-configuring the AMF and UE with restriction information, location data, and evaluation criteria, the system enables efficient real-time access control decisions without requiring complex operational procedures during actual network usage
3Reliability
If location-based access restrictions are enforced, then service reliability is improved, but measurement precision requirements increase
Solution Approach 1:
The patent applies different location measurement and verification approaches based on the specific access restriction scenario. For general area-based restrictions, standard location methods are sufficient, while for boundary-critical restrictions, the system activates enhanced verification mechanisms. This localized quality adjustment ensures reliable service disruption prevention without uniformly increasing measurement precision requirements across all operations
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by an access and mobility management function (AMF) entity in a wireless communication system is provided. The method comprises receiving, from a managed function entity, information on a non-terrestrial network (NTN) public land mobile network (PLMN) restriction, wherein the information includes first information on an identity (ID) of public land mobile network (PLMN) and second information associated with a location for which an access of the PLMN is restricted for an NTN access and restricting the NTN access associated with the location based on the first information and the second information.