Non-Public Network Emergency Calling Through UE-AMF Registration
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Solution Overview
Problem
Existing wireless communication systems lack efficient methods for providing emergency call services in non-public networks, which are essential for supporting enhanced mobile broadband, ultra-reliable low latency communications, and massive machine-type communications.
Innovation Solution
A method and device that enable user equipment (UE) and access and mobility management function (AMF) to exchange information about supported non-public networks and their emergency call capabilities, allowing the UE to perform emergency calls in non-public networks by receiving and identifying support through registration messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If emergency call service is provided in non-public networks, then emergency communication capability is improved, but network complexity increases
Solution Approach 1:
The patent segments the emergency call service provision into distinct functional modules: UE capability indication, AMF network support indication, and registration message exchange. This segmentation allows the complex emergency call service to be implemented through standardized, modular procedures rather than monolithic system changes.
Solution Approach 2:
The patent implements universal emergency call support across both public and non-public networks using the same registration and indication mechanisms. The AMF and UE use standardized message exchanges that work across different network types, reducing the need for separate emergency call implementations.
2Reliability
If information exchange about emergency call support is implemented, then service reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the emergency call support indication with the existing registration procedure. The AMF includes emergency call support information in the registration accept message, and the UE includes capability information in the registration request, combining multiple functions into a single signaling exchange rather than requiring separate messages.
Solution Approach 2:
The patent performs preliminary capability indication during the registration phase, before actual emergency call services are needed. The UE indicates its emergency call capabilities when registering, and the AMF responds with network support information, so that when an emergency occurs, the service can be immediately activated without additional signaling.
3Ease of operation
If emergency call service is supported in non-public networks, then user convenience is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service mechanisms where the UE automatically indicates its emergency call capabilities during registration, and the AMF automatically provides network support information. The system autonomously determines and configures emergency call service parameters without requiring manual user input or complex configuration procedures.
Data Source
AI summary
The disclosure relates to a fifth-generation (5G) or sixth-generation (6G) communication system for supporting a higher data transmission rates. A method by a user equipment (UE) configured to perform an emergency call in a non-public network is provided. The method includes receiving, from an access and mobility management function (AMF), information related to at least one supported non-public network and information indicating whether the at least one supported non-public network supports an emergency call, transmitting, to the AMF, a registration request message including information indicating that the UE requests an emergency call service in a non-public network, receiving, from the AMF, a registration accept message including an emergency call number, identifying whether the registration accept message includes information indicating that the non-public network supports the emergency call service, and performing the emergency call in the non-public network based on a result of the identification.