Unified Data Management for Roaming Terminal Session Reliability
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Solution Overview
Problem
In wireless communication systems, particularly during roaming, the transmission of non-Internet Protocol (non-IP) address data can fail due to changes in data transmission methods between the initial registration and actual data transmission times, leading to session creation failures caused by mismatches in terminal subscription information.
Innovation Solution
A method and device for unified data management (UDM) in wireless communication systems that includes receiving subscriber information requests, providing non-IP data delivery authorization, and updating terminal subscriber information to ensure consistent data transmission paths, even if the data transmission method changes, by utilizing access and mobility management functions and network exposure functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal subscription information is updated at the initial registration time, then the data transmission method is determined, but the information becomes outdated when the actual data transmission occurs, leading to session creation failures
Solution Approach 1:
The patent performs preliminary actions by establishing the data transmission path and storing the data transmission method in the PDU session context during initial registration. This preliminary configuration ensures that when actual data transmission occurs, the correct path is already established, preventing session creation failures due to information changes.
Solution Approach 2:
The patent implements feedback mechanisms where the AMF retrieves and updates subscription information from the UDM before data transmission. The system continuously monitors and updates the data transmission method based on current subscription information, ensuring that the most accurate and up-to-date information is used for session creation.
2Ease of operation
If the data transmission method is determined at registration time, then initial configuration is simplified, but the system cannot adapt to changes in subscription information, causing transmission failures
Solution Approach 1:
The patent makes the system dynamic by allowing the data transmission method to be updated between registration and actual data transmission. The AMF can retrieve updated subscription information from the UDM and adjust the data transmission path accordingly, enabling the system to adapt to changes while maintaining operational simplicity.
Solution Approach 2:
The patent creates a universal solution that works for both static and dynamic subscription scenarios. The system can handle cases where subscription information remains unchanged as well as cases where it changes, by providing a flexible mechanism to retrieve and apply updated information before data transmission.
3Device complexity
If the system uses fixed data transmission paths, then network complexity is reduced, but the system cannot handle changes in terminal subscription information, leading to communication failures
Solution Approach 1:
The patent introduces the UDM as an intermediary that stores and provides authoritative subscription information. The AMF acts as a mediator that retrieves updated information from the UDM and applies it to the data transmission path. This intermediary mechanism allows the network to handle changes in subscription information without significantly increasing overall network complexity.
Data Source
AI summary
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate and, more specifically, to a method for controlling transmission of non-Internet protocol (non-IP) address data of a roaming terminal in unified data management (UDM) of a wireless communication system.