SMF Session Management for Cellular IoT Power Efficiency
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Solution Overview
Problem
Current 5G mobile communication systems face challenges in efficiently managing user equipment (UE) power consumption and data transmission timing for IoT services, particularly in industrial IoT applications, where timely data transmission is critical, and in supporting CIoT services like NIDD, which requires advanced session management and data rate control functions.
Innovation Solution
A method involving a session management function (SMF) and access management function (AMF) that receives radio access technology (RAT) type information to determine the application of small data rate control and schedule data transmissions, allowing UEs to connect proactively based on predetermined schedules, and enabling PDU session establishment without prior NIDD configuration between the 3rd party AS and NEF, thereby reducing power consumption and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs connect continuously to the network to ensure timely data transmission, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The network performs preliminary actions by proactively establishing PDU sessions and configuring data rate control functions before data transmission is needed. This allows UEs to remain in idle state with lower power consumption while ensuring data transmission reliability through pre-configured network resources that can be immediately activated when needed.
2Loss of time
If the network proactively establishes PDU sessions for scheduled data transmission, then data transmission timing is improved, but signaling overhead increases
Solution Approach 1:
The SMF's proactive PDU session establishment and data rate control configuration serve multiple functions simultaneously: they ensure timely data transmission by pre-configuring network resources, reduces signaling overhead by consolidating configuration operations, and enable flexible resource management for scheduled CIoT data transmissions. This multi-functional approach resolves the contradiction between improved timing and reduced signaling.
3Productivity
If small data rate control function is applied to CIoT UEs, then network resource efficiency is improved, but device complexity increases
Solution Approach 1:
The data rate control function operates autonomously based on pre-configured parameters received from the network. The SMF configures the control function with specific data rates and conditions, then the function self-manages CIoT data transmission without requiring complex real-time negotiations or additional device intelligence. This self-service mechanism improves network resource efficiency while keeping device complexity minimal.
Data Source
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AI summary
The present disclosure relates to a communication technique for fusing, with an IoT technology, a 5G communication system for supporting a higher data transmission rate than a 4G system, and a system therefor. The present disclosure may be applied to intelligent services, such as smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail, and security and safety related services, on the basis of 5G communication technologies and IoT-related technologies. Disclosure is a method for efficiently controlling a terminal for a cellular IoT service in a 5G mobile communication system.