AMF NSACF Network Slice Admission Control for 6G
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing network slice sessions, particularly in 6G communication systems that aim to connect hundreds of billions of devices and provide ultra-low latency and high data rates.
Innovation Solution
The proposed method involves an Access and Mobility Management Function (AMF) that transmits a request message to a Network Slice Admission Control Function (NSACF) for a slice availability check, based on the access type of a user equipment (UE). The NSACF performs the check and responds with the results, allowing the AMF to register the UE with the appropriate network slice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network slice admission control is implemented to manage available network slices, then network resource allocation efficiency is improved, but system complexity increases due to additional control functions and procedures
Solution Approach 1:
The network management function is segmented into specialized components: the AMF handles access and mobility management, while the NSACF handles network slice admission control. This segmentation allows each function to operate independently and efficiently, improving overall system productivity without requiring every component to handle all management tasks.
Solution Approach 2:
The NSACF acts as an intermediary between the AMF and the network slices. It receives availability information from the AMF, performs admission control decisions, and returns results to the AMF. This intermediary layer simplifies the AMF's workload while adding controlled complexity at the dedicated control point.
2Measurement precision
If slice availability check is performed based on access type, then network slice management accuracy is improved, but processing time increases
Solution Approach 1:
The NSACF performs preliminary actions by pre-determining network slice availability based on access type before the actual admission decision is needed. Availability information is prepared and stored in advance, allowing the AMF to quickly retrieve and use this information without performing complex calculations at the moment of admission control.
Solution Approach 2:
The NSACF provides feedback to the AMF about network slice availability status. This feedback mechanism allows the AMF to make informed admission decisions quickly, as the availability information is already processed and communicated, eliminating the need for real-time complex analysis.
Data Source
AI summary
A method performed by an access and mobility management function (AMF) in a wireless communication system is provided. The method includes transmitting, to a network slice admission control function (NSACF), a request message for a slice availability check including information regarding an access type of a user equipment (UE), based on a registration request of the UE for one or more single network slice selection assistance informations (S-NSSAIs), in case that the slice availability check is performed for the one or more S-NSSAIs, based on the access type of the UE at the NSACF, receiving a response message including information regarding a result of the slice availability check, from the NSACF, and transmitting a registration response for the one or more S-NSSAIs to the UE, based on the result of the slice availability check.