PDU Session Parameter Prioritization and Feedback
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Solution Overview
Problem
Current data transmission methods in wireless communications networks face high signaling overheads and reduced success rates for establishing protocol data unit (PDU) sessions, particularly due to inefficient parameter handling and lack of effective feedback mechanisms.
Innovation Solution
A data transmission method where a terminal device sends a parameter value list or combination list to a session management function (SMF) device, which prioritizes parameters for PDU session establishment, and provides feedback on unsuccessful attempts, allowing the terminal device to adjust parameters and re-initiate sessions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the SMF device notifies the terminal device to re-initiate PDU session establishment after failure, then the terminal device can attempt to establish a PDU session again, but the signaling overheads increase and the success rate decreases
Solution Approach 1:
The SMF device provides feedback information to the terminal device about why the PDU session establishment failed (e.g., parameter validation results, network conditions). This feedback enables the terminal device to adjust its parameters and retry with improved settings, increasing the success rate without requiring multiple blind re-initiation attempts that would generate excessive signaling overheads.
Solution Approach 2:
The terminal device modifies establishment parameters based on feedback from the SMF device. By changing parameters such as data network name, slice selector, or other configuration values according to network feedback, the terminal device can successfully establish PDU sessions that initially failed, thereby improving reliability without proportionally increasing signaling overheads.
2Reliability
If the terminal device re-initiates PDU session establishment multiple times after failure, then the success rate may improve, but the signaling overheads increase significantly
Solution Approach 1:
The SMF device provides timely feedback about establishment failures to the terminal device, enabling the terminal to adjust parameters and retry more efficiently. This feedback mechanism reduces the number of repeated attempts needed compared to blind re-initiation, thereby reducing time loss while maintaining improved success rates.
Solution Approach 2:
The terminal device performs preliminary parameter adjustments based on feedback before re-initiating PDU session establishment. By preparing and optimizing parameters in advance based on previous failure analysis, the terminal device reduces the time required for subsequent establishment attempts while improving success probability.
Data Source
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AI summary
Disclosed are a method for transmitting data, a terminal device, and an SMF device. The method comprises: the terminal device sends an establishment request message of a first protocol data unit (PDU) session to the SMF device, the establishment request message of the first PDU session carrying at least one priority list for establishing a plurality of values of each parameter in the parameters of the first PDU session. The method, the terminal device, and the SMF device in the embodiments of the present application facilitate reducing signaling overhead and improving the probability of success of the PDU session.