5G PDU Session Modification for DN Type Recognition
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Solution Overview
Problem
In the 5G mobile communication system, there is a lack of measures for recognizing the types of Data Networks (DNs) that sessions are connected to and realizing user data communication across various DNs, especially when different types of access networks are used for session establishment.
Innovation Solution
A terminal apparatus and core network apparatus perform a PDU session modification procedure, where a PDU session modification request message is sent to modify the connection destination of a PDU session to a Mobile Edge Computing (MEC) data network, using information that includes IP addresses or Traffic Flow Templates (TFTs) for user data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common protocol for session management is used across different Data Networks, then session management is simplified, but measures for recognizing DN types and realizing user data communication are not revealed
Solution Approach 1:
The patent introduces an intermediary information element within the session management protocol that carries DN type recognition information. This intermediary structure allows the common protocol to maintain simplicity while still conveying necessary DN-specific information through embedded fields that indicate DN type and communication characteristics.
Solution Approach 2:
The session management protocol is segmented into multiple information elements, with specific fields dedicated to DN type identification and communication parameters. This segmentation allows the protocol to maintain a common structure while providing specialized information for different DN types without increasing overall complexity.
2Adaptability or versatility
If sessions connect to a wide variety of Data Networks, then network versatility is improved, but measures for recognizing DN types and realizing user data communication are lacking
Solution Approach 1:
The patent employs parameter changes by introducing variable information elements in the session management protocol that adapt to different DN types. These parameters include DN type identifiers, IP address information, and TFT (Traffic Flow Template) data that change based on the specific DN being accessed, enabling reliable communication across diverse networks.
Solution Approach 2:
The session management protocol is designed with universal information elements that can handle multiple DN types through a common structure. The protocol uses multi-functional fields that can carry different types of information (IP addresses, TFTs, DN type indicators) depending on the DN being accessed, ensuring reliable communication across a wide variety of data networks.
Data Source
AI summary
Provided are: a terminal apparatus that can support establishment of sessions that connect to various DNs; a measure for communication control that is preferable for an apparatus on a network that can connect to the terminal apparatus; a measure for communication control for recognizing the types of DNs with which the sessions are connected; and a measure for communication control for achieving user data communication. With this configuration, the preferable measures for communication control and measures for achieving user data communication can be provided to a control apparatus and a terminal apparatus included in a communication system that supports the establishment of sessions that connect to various DNs.