AMF Priority Service Enablement Without a UE Establishment Cause
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Solution Overview
Problem
Existing 5G mobile communication systems face challenges in providing priority services such as multimedia priority service (MPS) and mission critical service (MCX) to user equipment (UE) that are not preconfigured with these capabilities in the universal subscriber identity module (USIM).
Innovation Solution
The method involves an access and mobility management function (AMF) in a wireless network to provide priority services by receiving subscription data from a unified data management (UDM) and sending an accept message for priority services to UE, even when the UE does not include an establishment cause associated with these services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If UE is not preconfigured with MPS and MCX capability in USIM, then device complexity and subscription management flexibility are improved, but the ability to provide priority services reliably is worsened
Solution Approach 1:
The network performs preliminary actions by pre-configuring priority service capabilities in the UDM database before the UE needs them. When a UE requests priority services, the AMF checks the UDM for pre-stored subscription data containing MPS and MCX capabilities, allowing the network to dynamically enable priority services without requiring UE pre-configuration in the USIM.
Solution Approach 2:
The UDM acts as an intermediary between the subscription management system and the AMF. It stores and provides subscription data containing priority service capabilities to the AMF, which then uses this information to make routing decisions. This intermediary mechanism allows the network to manage priority services centrally without burdening the UE with pre-configuration.
2Ease of operation
If UE sends request message without establishment cause for priority service, then ease of operation is improved, but the precision of service routing is worsened
Solution Approach 1:
The system implements feedback by having the AMF query the UDM for subscription data after receiving a service request from the UE. Even when the UE does not include an establishment cause indicating priority service needs, the AMF receives feedback from the UDM about the UE's subscribed capabilities, allowing accurate routing decisions to be made based on this feedback information.
3Adaptability or versatility
If network dynamically assigns priority service capabilities, then adaptability is improved, but information management complexity is worsened
Solution Approach 1:
The UDM is designed as a universal information management platform that handles multiple functions: storing subscription data, managing priority service capabilities, providing authentication information, and supporting various types of service requests. This multi-functional design consolidates information management complexity into a single universal system rather than requiring separate specialized systems for each function.
Data Source
AI summary
Embodiments herein provide methods for providing priority services to a UE by an AMF. The method includes receiving a request message from the UE, receiving, from a unified data management (UDM), subscription data of the UE, and, based on identifying that the subscription data comprises information related to a priority service and the request message does not include an establishment cause associated with the priority service, sending, to the UE, an accept message for the priority service in response to receiving the request message. The priority service comprises at least one of multimedia priority service (MPS) or mission critical service (MCX).