SMF NSACF Network Slice Session Management
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Solution Overview
Problem
Current wireless communication systems, particularly 5G networks, face challenges in managing network slices efficiently to meet diverse service requirements such as latency, communication coverage, data rate, and bandwidth, especially in IoT environments where intelligent Internet services are needed.
Innovation Solution
The method involves a session management function (SMF) and a network slice admission control function (NSACF) that manage network slice availability by updating the number of PDU sessions per slice based on user equipment (UE) identifiers and protocol data unit (PDU) session IDs, ensuring that network resources are allocated appropriately for specific services through the transmission of update request and response messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network slicing is implemented to meet diverse service requirements, then service adaptability and efficiency are improved, but network complexity and resource management overhead increase
Solution Approach 1:
The network is divided into multiple independent network slices, each optimized for specific service requirements (e.g., enhanced mobile broadband, ultra-reliable low-latency communication, massive machine type communication). This segmentation allows different services to have dedicated resources while maintaining overall network manageability through modular architecture.
Solution Approach 2:
A network slice management function is introduced as an intermediary layer between the core network and access network. This mediator handles slice selection, resource allocation, and coordination between different network functions, reducing the complexity burden on individual network elements while maintaining service adaptability.
2Productivity
If the number of PDU sessions per network slice is increased to handle more traffic, then data throughput is improved, but network congestion and service quality degradation occur
Solution Approach 1:
The system implements feedback mechanisms where the network slice management function continuously monitors resource usage, session counts, and service quality metrics. Based on this feedback, the system dynamically adjusts resource allocation, limits session numbers when thresholds are approached, and reallocates resources to maintain service quality while maximizing throughput.
Solution Approach 2:
The network slice configuration is made dynamic rather than static. Resource allocation, session limits, and slice parameters can be adjusted in real-time based on current network conditions, traffic patterns, and service requirements, allowing the system to adapt to changing demands while preventing congestion and quality degradation.
Data Source
AI summary
The disclosure relates to a communication method and system for converging a 5G communication system for supporting higher data rates beyond a 4G system with a technology for IoT. The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology such as smart homes, smart buildings, smart cities, smart cars, connected cars, health care, digital education, smart retail, and security and safety services. A method performed by an SMF includes determining to update network slice availability; transmitting, to an NSACF, a network slice availability update request message including a UE ID and a PDU session ID; and receiving, from the NSACF, a network slice availability update response message including a result indication. The result indication is associated with updating a number of PDU sessions per network slice based on the UE ID and the PDU session ID.