PDU Session Data Processing for 5G Service Continuity
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Solution Overview
Problem
Current 5G network architectures lack a standardized method for determining and processing application data packets across different PDU sessions, particularly in scenarios where applications require specific session and service continuity modes, leading to uncertainty in data transmission and local service processing.
Innovation Solution
A data processing method and system that enables terminal devices to determine and process application data packets based on a new 'fourth mode' of service continuity, allowing for reselection of UPF function devices when the user equipment moves out of their service area, and providing options for transmission through either a PDU session for the first or fourth mode, ensuring seamless data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a PDU session is established for transmitting application data packets in a specific mode, then the session and service continuity is maintained for that mode, but the terminal device cannot establish additional PDU sessions for the same data network in other modes
Solution Approach 1:
The patent applies multi-functionality by enabling a single PDU session to support multiple session and service continuity modes through the introduction of an uplink classifier (UL CL) device. The UL CL device routes different application data packets to different IP anchors based on the required mode, allowing one PDU session to serve multiple functions and support both first-mode and second-mode applications simultaneously.
2Adaptability or versatility
If multiple PDU sessions are established for different modes, then multi-mode data transmission is supported, but the terminal device faces uncertainty in determining which PDU session to use for specific applications
Solution Approach 1:
The patent applies self-service by implementing an automatic selection mechanism where the terminal device and network device work together to determine the appropriate PDU session for each application. The system automatically identifies whether an application requires first-mode or second-mode transmission and routes it accordingly, eliminating the need for manual user intervention or complex user-side decision-making processes.
3Reliability
If applications require specific session and service continuity modes, then service continuity is ensured, but data packets of applications supporting local service cannot be efficiently processed
Solution Approach 1:
The patent applies local quality by implementing mode-specific IP anchors that are optimized for their respective purposes. The first-mode IP anchor handles applications requiring wide-area service continuity, while the second-mode IP anchor is optimized for local service processing. This specialization allows each component to be tailored to its specific function, improving both service continuity for mobile applications and processing efficiency for local services.
Data Source
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AI summary
A data processing method, a terminal device, and a network device are provided, to provide a processing manner of an application data packet in a fourth mode. The data processing method includes: obtaining, by a terminal device, first information, where the first information is used to determine a processing manner of an application data packet in a fourth mode; and processing, by the terminal device, the data packet in the fourth mode in the processing manner, where the processing manner is transmitting the application data packet in the fourth mode through a PDU session for transmitting an application data packet in a first mode, or transmitting the application data packet in the fourth mode through a PDU session for transmitting only the application data packet in the mode. In this application, the terminal device first obtains the first information. The first information includes the processing manner of the application data packet in the fourth mode. Therefore, the terminal device knows how to process the data packet in the fourth mode, and further processes the terminal device in the determined processing manner.