PDU Session Modification for Industrial Traffic

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing 3GPP 5G System does not support industrial traffic, such as Time Sensitive Network (TSN) based traffic, due to the lack of a specific PDU session type.

Innovation Solution

A method and apparatus for user equipment (UE) to transmit a PDU Session Modification Request message with a PDU session type indicating industrial traffic, and for the network to recognize and process this type differently to support industrial traffic requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a specific PDU session type for industrial traffic is introduced, then industrial traffic support is improved, but device complexity increases

Engineering Contradiction:

Improveindustrial traffic supportVSAvoidPDU session type complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments PDU session types by introducing a specific type (e.g., PDU session type 6) for industrial traffic, separating it from general traffic types. This segmentation allows the network to distinguish and handle industrial traffic differently, providing targeted support for TSN and other industrial applications without affecting other traffic types.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the PDU session type parameter to enable industrial traffic support. By modifying the PDU session type indication in signaling messages (such as PDU Session Establishment Request, PDU Session Modification Request), the system adapts to support industrial traffic requirements while maintaining compatibility with existing traffic types.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If PDU session modification procedures are enhanced for industrial traffic, then service quality is improved, but signaling overhead increases

Engineering Contradiction:

Improveindustrial traffic service qualityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent applies preliminary action by establishing PDU sessions with appropriate industrial traffic type indications in advance. During PDU session establishment or modification, the UE includes the specific PDU session type for industrial traffic, allowing the network to pre-configure appropriate QoS parameters, tunnel settings, and routing policies. This preliminary configuration avoids the need for repeated signaling during actual industrial traffic transmission.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent modifies signaling message parameters to include PDU session type indications for industrial traffic. By changing the PDU session type parameter in NAS signaling messages (PDU Session Establishment Request, PDU Session Modification Request), the system enables the network to recognize and process industrial traffic requirements without adding excessive signaling overhead.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250150510A1PDU session modification procedure for industrial traffic

Publication Date: 2025.05.08 INTELLECTUAL DISCOVERY CO LTD

AI summary

One embodiment of the present specification provides a method in which a terminal operates. The method comprises the steps of: transmitting a protocol data unit (PDU) session modification request message; and, in response to the transmitting of the PDU Session Modification Request message, receiving a PDU Session Modification command message, a PDU Session Modification ACK message, or a PDU Session Modification reject message, wherein the PDU Session Modification Request message includes a PDU session type to indicate industrial traffic, and wherein the PDU Session Modification reject message includes a cause value indicating that a network does not support the PDU session type.