PDU Session Type for Industrial Traffic in 5G
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Solution Overview
Problem
The 5G mobile communication system's existing PDU session types do not support Time-Sensitive Networking (TSN)-based traffic, which is essential for industrial applications requiring high reliability and low latency.
Innovation Solution
A method and apparatus for user equipment (UE) to transmit a PDU SESSION ESTABLISHMENT REQUEST message with a PDU session type indicating industrial traffic, such as TSN, TSC, DetNet, URLLC, or IIoT, to support efficient processing of industrial traffic sessions, reducing unnecessary signaling overhead and minimizing battery and resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the existing PDU session types are used in 5G mobile communication system, then the system can maintain compatibility with conventional protocols, but it cannot support Time-Sensitive Networking (TSN)-based industrial traffic requiring high reliability and low latency
Solution Approach 1:
The patent segments the PDU session types by introducing a specific indication (first indication) within the PDU session establishment request message to distinguish industrial traffic (such as TSN-based traffic) from conventional traffic. This segmentation allows the network to handle different traffic types with appropriate QoS policies, thereby supporting high reliability requirements for industrial traffic while maintaining compatibility with existing protocols.
2Adaptability or versatility
If a new PDU session type for industrial traffic is introduced, then support for TSN-based traffic is improved, but the complexity of the session management system increases
Solution Approach 1:
The patent uses an intermediary indication mechanism (first indication in the PDU session establishment request message) that acts as a mediator between the UE and the network. This indication allows the network to identify industrial traffic and apply appropriate QoS policies without requiring complex modifications to the core session management architecture, thus supporting industrial traffic while minimizing system complexity.
3Loss of energy
If industrial traffic is not distinguished from general traffic, then the signaling protocol remains simple, but resource wastage occurs due to unnecessary signaling overhead
Solution Approach 1:
The patent extracts the essential characteristic of industrial traffic by introducing a specific indication (first indication) in the PDU session establishment request message. This extraction allows the network to identify and separate industrial traffic from general traffic, enabling optimized resource allocation and reduced signaling overhead for industrial traffic without significantly increasing overall system complexity.
Data Source
AI summary
One example of the present specification provides a method operational in a terminal. The method may comprise the steps of: transmitting a protocol data unit (PDU) session establishment request message; and in response to the transmission of the PDU session establishment request message, receiving a PDU session establishment acceptance message or a PDU session establishment rejection message. The PDU session establishment request message may comprise a PDU session type indicating industrial traffic. When the PDU session establishment rejection message is received, the PDU session establishment rejection message may comprise a cause value indicating that a network does not support the PDU session type.