5G PDU Session Establishment via Terminal-Reported Type
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Solution Overview
Problem
In 5G mobile communication, determining the correct type of packet data unit (PDU) session for a terminal is challenging due to the variety of session types, such as Internet and Ethernet sessions, which affects communication accuracy.
Innovation Solution
A session handling method where a terminal determines the session type based on the application and sends this information to the access and mobility management function (AMF) entity to establish the correct type of PDU session, using enhanced data network identifiers and types to ensure accurate communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple types of PDU sessions are defined in 5G mobile communication, then the system provides greater versatility and adaptability for different communication needs, but it becomes more difficult to determine the correct session type for a terminal
Solution Approach 1:
The patent introduces new parameters (DN type and PDU type) to the existing session management framework. By changing the parameter structure to include explicit type indicators, the system can handle multiple session types (Internet, Ethernet, unstructured) while providing clear guidance for determining the correct type. The DN type parameter specifically addresses the difficulty of session type determination by categorizing data networks into distinct types that map to appropriate PDU session configurations.
2Reliability
If the terminal determines session type based on application and sends it to the network, then communication correctness is improved, but the signaling overhead and message complexity increase
Solution Approach 1:
The patent extends the existing DN (Data Network) information structure to serve multiple functions. The DN type field is designed to simultaneously identify the data network, indicate the session type required, and guide SMF selection. This multi-functional approach allows the terminal to communicate session type information without creating entirely new message structures, thereby improving communication correctness while minimizing the increase in message complexity.
Solution Approach 2:
The DN type acts as an intermediary parameter that bridges the terminal's application requirements and the network's session management decisions. Instead of the terminal directly specifying complex session parameters, it provides the DN type as an intermediate indicator, which the network side (AMF, SMF) uses to automatically determine the appropriate PDU session type and configuration, simplifying the overall message structure while ensuring correctness.
Data Source
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AI summary
This application provides a session handling method and apparatus. The method includes: initiating, by a terminal, an application APP, and determining a session type of a packet data unit PDU session based on the APP; and sending, by the terminal, a first message to an access and mobility management function AMF entity, where the first message includes the session type, and the first message is used to request to establish the PDU session of the session type. In the method, when initiating, to the AMF entity, the first message used to request to establish the PDU session, the terminal adds the session type of the PDU session to the first message, so that a network side can establish the PDU session of the corresponding type based on the session type of the PDU session that is sent by the terminal, so as to establish the PDU session of the correct type for the terminal, thereby improving correctness of communication between the terminal and the network side.