CIoT Terminal Attach Procedure Optimization
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Solution Overview
Problem
The existing technologies for connecting Cellular Internet of Things (CIoT) terminals to core networks lack a clear method for data transmission and reception procedures, making it difficult to optimize communication efficiency and support low data rate communication for mass-produced terminals with extended battery life in indoor or underground environments.
Innovation Solution
A terminal apparatus and communication method that includes a transmission and/or reception unit configured to perform communication using CIoT EPS Optimisation, with specific control messages exchanged during the attach procedure to enable the use of optimized communication methods, allowing the terminal to attach to and detach from the core network efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a CIoT terminal uses existing core network connection methods, then the terminal can attach to the core network, but the data transmission and reception procedures are not clear and communication efficiency cannot be optimized
Solution Approach 1:
The terminal apparatus includes a control unit that determines in advance whether to use the first or second attach procedure based on stored determination results. This preliminary decision-making capability allows the terminal to select the appropriate attachment method before actual connection, optimizing communication efficiency while managing procedure complexity through pre-established decision logic.
Solution Approach 2:
The attachment procedure is divided into two distinct paths: a first attach procedure for general cases and a second attach procedure for optimized CIoT scenarios. This segmentation allows each procedure to be tailored for specific purposes, with the second procedure providing optimized data transmission for CIoT terminals while the first procedure handles conventional attachment needs.
2Productivity
If the terminal uses optimized communication methods for CIoT, then data transmission efficiency improves, but the complexity of control message exchange increases
Solution Approach 1:
The terminal dynamically switches between different attach procedures based on real-time determination results stored in its control unit. This dynamic adaptability allows the terminal to select the most appropriate procedure (first or second attach procedure) based on current network conditions and terminal requirements, optimizing data transmission efficiency while managing control message complexity through flexible procedure selection.
3Adaptability or versatility
If the terminal supports multiple transmission methods, then adaptability to different network conditions improves, but the complexity of selecting and switching methods increases
Solution Approach 1:
The control unit stores determination results in advance that guide the selection between first and second attach procedures. This pre-established determination logic simplifies the method selection process by using stored results to automatically choose the appropriate transmission method, thereby supporting multiple transmission methods for adaptability while reducing the complexity of method selection and switching through automated decision-making based on predetermined criteria.
Data Source
AI summary
To provide a communication procedure for data transmission and/or reception suitable to a CIoT terminal. In a communication control method of a terminal apparatus according to the present invention, a first data transmission and/or reception method is a method for transmitting and/or receiving user data by use of a Data Radio Bearer (DRB), a second data transmission and/or reception method is a method for transmitting and/or receiving user data a Signalling Radio Bearer (SRB), and the communication control method includes a step of changing the user data transmission and/or reception method from the first data transmission and/or reception method into the second data transmission and/or reception method, and a step of transmitting and/or receiving the user data to/from a core network by the second data transmission and/or reception method.