Unified Data Management Entity for IMS Service AMF Identification
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Solution Overview
Problem
Current communication systems face challenges in efficiently managing registrations for Internet Protocol Multimedia Subsystem (IMS) services across multiple access and mobility management functions, leading to difficulties in providing accurate T-ADS information for terminating calls.
Innovation Solution
The proposed solution involves assigning a specific registration identifier to each UE registration, which is provided to a Unified Data Management (UDM) entity for registration. This identifier is used to identify the Access and Mobility Management Function (AMF) managing IMS access for the UE, enabling the UDM to select the appropriate AMF for T-ADS purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple access and mobility management functions manage UE registrations, then service coverage and reliability are improved, but difficulty in identifying the correct AMF for IMS services increases
Solution Approach 1:
The patent introduces a unified data management entity as an intermediary that centralizes registration information from multiple AMFs. This mediator stores and manages the mapping between UEs and their serving AMFs, allowing network entities to query the correct AMF for IMS services without directly managing multiple AMF connections themselves.
Solution Approach 2:
The unified data management entity serves multiple functions: it acts as a registration repository for multiple AMFs, provides query services for network entities, and manages the mapping between UEs and AMFs. This universal entity consolidates what would otherwise require separate management mechanisms at each AMF.
2Productivity
If registration information is distributed across multiple AMFs, then system scalability is improved, but information retrieval efficiency for IMS services deteriorates
Solution Approach 1:
The patent merges the registration information storage function across multiple AMFs into a single unified data management entity. While AMFs remain distributed and independent for scalability, their registration data is consolidated in one location, enabling efficient single-point retrieval without sacrificing the scalability benefits of distributed AMF architecture.
3Loss of time
If a centralized registry stores all registration information, then information retrieval efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the system into distinct functional components: distributed AMFs that handle access and mobility management, a unified data management entity that handles registration information storage, and network entities that query for service information. This segmentation allows each component to remain relatively simple while the overall system achieves efficient information retrieval.
Data Source
AI summary
There is provided an apparatus, method, and computer program for determining, an identifier of an access and mobility management function serving a user equipment for a registration associated with an internet protocol multimedia subsystem, IMS, service, while the user equipment may for the same subscription have also other registrations not associated with an internet protocol multimedia subsystem, IMS, service.