5G TSN Virtual Switching for Reliable Low-Latency Transmission
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Solution Overview
Problem
Current technologies lack a specific solution for integrating a 5G system with Time Sensitive Networking (TSN) to enable end-to-end reliable data transmission with low latency, which is crucial for applications like automobile control and industrial internet.
Innovation Solution
The 5G system is virtualized as a switching node in TSN, with session management network elements obtaining and reporting port information and delay data to a centralized network configuration element, allowing for end-to-end data transmission by determining and configuring virtual switching nodes based on port and delay information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the 5G system is virtualized as a switching node in TSN, then end-to-end reliable data transmission with low latency is enabled, but device complexity increases due to the need for virtual switching node configuration and port information management
Solution Approach 1:
The session management network element acts as an intermediary between the terminal device and the centralized network configuration element. It collects port information from terminal devices, determines transmission delays, and reports this information to the centralized network configuration element, which then configures the virtual switching nodes. This intermediary approach simplifies the overall system by centralizing the configuration management while enabling reliable end-to-end transmission.
2Loss of time
If port information and delay data are collected and reported to configure virtual switching nodes, then transmission delay is reduced through optimized routing, but loss of information increases due to the additional signaling overhead for port information reporting
Solution Approach 1:
The session management network element collects and determines port information and transmission delay data in advance during the PDU session establishment or modification processes. By performing this information gathering and delay determination preliminarily, the system prepares the necessary configuration data before actual data transmission begins, enabling optimized routing decisions to be made without incurring delay during the transmission phase itself.
3Adaptability or versatility
If the session management network element obtains port information during PDU session establishment or modification, then adaptability is improved by supporting multiple scenarios, but device complexity increases due to the need to handle multiple information collection procedures
Solution Approach 1:
The session management network element is designed with multi-functionality to handle port information collection in multiple scenarios. It can obtain port information during both PDU session establishment and PDU session modification procedures, and can determine transmission delays for different QoS flows. This universal capability allows the same network element to serve multiple purposes across different operational scenarios without requiring separate specialized components for each function.
Data Source
AI summary
A communication method, device, and medium are provided, the method including determining, by a terminal device, whether the terminal device supports at least one of a time sensitive networking (TSN) service, a packet data unit (PDU) session corresponding to a TSN service needs to be established, a currently established PDU session needs to carry a TSN stream, or an established PDU session needs to carry a TSN stream, and sending, by the terminal device, port information of the terminal device to a session management network element, where the port information of the terminal device includes a port identifier of the terminal device, and further includes information about a transmission delay between a port of the terminal device and an external neighbor node.