Fraunhofer IPMS
Wireless TSN by light
Deterministic and real-time capable data transmission via TSN. In addition to traditional Ethernet cabling, WLAN, 4G/LTE and 5G are being discussed for data transmission. But there is another way: using light, as Fraunhofer IPMS will be demonstrating at the trade fair.
Time Sensitive Networking (TSN) extends existing Ethernet standards to include mechanisms for deterministic and real-time-capable data transmission via a switched network. At present, real-time communication is based on wired Ethernet transmission media - a clear limitation for mobile applications such as robots, modular and flexible production cells and other automation technology applications. Deterministic and real-time-capable wireless transmission is also subject to clear limitations due to the properties of the transmission medium. Depending on the application, a defined time budget is available for the transmission path between transmitter and receiver - including processing time. With today's (4G/LTE, WLAN) or the future wireless standard 5G, the required latency times from automation in the millisecond range and faster cannot be reliably achieved.
The Fraunhofer Institute for Photonic Microsystems therefore favors Li-Fi technology. Li-Fi HotSpots use the spectrum of light instead of radio to transmit data. Compared to radio, optical technology is fundamentally safer from electromagnetic interference. It is tap-proof and also real-time capable in the microsecond range. These factors predestine optical communication for industrial use. The local diversity also simplifies network planning, eliminating the need for time-consuming antenna planning and alignment.
At the trade fair, Fraunhofer IPMS will be demonstrating that Time Sensitive Networking can already be implemented today without cables. In addition to TSN IP cores for automation technology applications, Fraunhofer IPMS also develops wireless optical communication solutions for industrial applications.
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