The global site of the UK's leading magazine for automation, motion engineering and power transmission
10 December, 2018

Product and Supplier Search

Facebook

TSN core could simplify real-time Ethernet networks

19 November, 2018

Germany’s Fraunhofer Institute for Photonic Microsystems (IPMS) has developed a TSN IP core to simplify the implementation of endpoints in TSN-capable Ethernet networks. The core consists of modules for time synchronisation, traffic-shaping and Ethernet MAC communications.

Standard Ethernet technology does not allow data to be transmitted consistently in real time, requiring the use of dedicated real-time fieldbuses. But these buses rely on special hardware and do not comply with the IEEE 802.1 and 802.3 network standards, preventing optimal integration.

The Fraunhofer developers believe that TSN (Time-Sensitive Networking) will allow critical real-time messages to be transmitted deterministically throughout networks using standard Ethernet hardware. They say that the joint transmission of real-time and normal Ethernet communications will lead to completely new approaches for the convergence of production and IT networks.

“The synchronisation of time is an important TSN element, as deterministic data delivery demands that all devices throughout the network have the same understanding of time, as defined in IEEE 802.1AS-rev,” explains Dr Frank Deicke, who leads the IPMS’ wireless microsystems activities. “Traffic shaping and scheduling enables the parallel transmission of datastreams with both soft and hard real-time requirements, as well as so-called best-effort traffic.

The IEEE standard already defines a way of prioritising time-critical datastreams. However, in the automotive sector, for example, there are applications that need lower jitter and latency. The IEEE 802.1Qbv sub standard establishes criteria for fixed cyclic transmission windows that allow for the unimpeded transmission along an entire path.




Magazine
  • To view a digital copy of the latest issue of Drives & Controls, click here.

    To visit the digital library of past issues, click here

    To subscribe to the magazine, click here

    To see the latest Products & Services Directory, click here

     

Exhibition

Birmingham 2020The next Drives & Controls Exhibition and Conference will take place in Birmingham, UK, from 21-23 April, 2020. For more information on the event, visit the Show Web site

Poll

"Do you think that robots create or destroy jobs?"

Newsletter
Newsletter

Events

Most Read Articles