S-NSSAI Delivery via Base Station for Reliable Slice Sessions
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Solution Overview
Problem
In wireless communication systems, terminals often lack the necessary Single-Network Slice Selection Assistance Information (S-NSSAI) to utilize network slices effectively, leading to session management issues.
Innovation Solution
The proposed method involves an access and mobility management function (AMF) receiving PDU session identifiers from a base station, transmitting and receiving messages with network entities to determine and provide allowed slices based on S-NSSAI, ensuring terminals receive the required information for network slice utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network slicing is implemented without providing S-NSSAI information to terminals, then network slice functionality can be established, but terminals cannot properly utilize the network slices leading to session management failures
Solution Approach 1:
The base station acts as an intermediary that receives S-NSSAI information from the AMF and forwards it to the terminal. This mediator approach resolves the information gap by having the base station bridge the communication between the network core (AMF) and the terminal, ensuring the terminal receives necessary slice selection assistance information without requiring direct AMF-terminal communication for this specific data
Solution Approach 2:
The S-NSSAI information is provided to the terminal in advance through the base station before the terminal attempts to establish network slice sessions. This preliminary provision of information prevents session management failures by ensuring the terminal has the necessary slice selection assistance information ready before needing to utilize network slices
2Loss of information
If S-NSSAI information is provided through additional messaging between AMF and base station, then terminal can receive required information, but signaling overhead and message exchange complexity increase
Solution Approach 1:
The S-NSSAI information is merged into existing message exchanges between the AMF and base station rather than creating separate dedicated signaling messages. By combining the slice information provision with routine messaging already occurring in the network, the solution delivers necessary information while minimizing additional signaling overhead and complexity
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.