UDM AMF Registration Management via Access Type Segmentation
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Solution Overview
Problem
In 5G mobile communication systems, Unified Data Management (UDM) faces challenges in efficiently managing Access and Mobility Management Function (AMF) registrations across different access types, including 3GPP and non-3GPP access, due to the complexity of handling multiple serving AMFs and determining the correct access type during registration procedures.
Innovation Solution
The UDM system receives messages related to AMF registration, including access type information, and stores this information. If a second AMF is registered as a serving AMF for the same access type, it transmits a deregistration message to the existing AMF, allowing efficient management of AMFs per access type by storing access type information alongside AMF IDs and handling deregistration requests based on access type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UDM stores only AMF ID information without access type information, then the storage structure is simple, but the UDM cannot efficiently manage multiple serving AMFs for different access types (3GPP and non-3GPP)
Solution Approach 1:
The patent segments the AMF registration management by introducing access type information (3GPP access or non-3GPP access) as a distinguishing attribute. This allows the UDM to maintain separate registration records for different access types, enabling independent management of serving AMFs for each access type without conflating them in a single undifferentiated storage structure.
Solution Approach 2:
The patent adds a new dimension (access type) to the AMF registration data structure. By storing both AMF ID and access type information together, the system transforms from a one-dimensional storage (only AMF ID) to a two-dimensional storage structure, enabling differentiation and efficient management of multiple serving AMFs across different access types.
2Loss of information
If the UDM receives registration messages from multiple AMFs without access type differentiation, then the message processing is straightforward, but the UDM cannot determine which AMF corresponds to which access type during deregistration
Solution Approach 1:
The patent applies preliminary action by including access type information in the registration message at the time of initial registration. This ensures that the UDM has the access type information available before any deregistration operations occur, eliminating the need for complex determination logic during deregistration and preventing information loss.
Solution Approach 2:
The access type information acts as an intermediary attribute that links the AMF ID to its corresponding access type (3GPP or non-3GPP). This intermediary information enables the UDM to correctly identify and process deregistration requests for the appropriate access type without losing critical association information.
3Reliability
If the UDM does not store access type information, then the data storage is minimal, but the UDM cannot properly handle deregistration requests specific to 3GPP or non-3GPP access types
Solution Approach 1:
The patent applies local quality by storing access type information specifically where it is needed - in the AMF registration data structure at the UDM. This targeted storage of access type information ensures that deregistration operations can be performed with high accuracy for the specific access type without requiring redundant information storage throughout the entire system.
Data Source
AI summary
In one embodiment of the present invention, a method for enabling a UDM (Unified Data Management) to perform a registration related procedure of an AMF (Access and Mobility Management Function) in a wireless communication system comprises the steps of: receiving, by the UDM, a message related to serving AMF registration of a UE, which includes access type information and ID (Identity) information, from a first AMF; transmitting, by the UDM, a deregistration related message to a second AMF when the second AMF exists, wherein the second AMF is registered as a serving AMF of the UE and related to the access type information.