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Real-Time Ethernet: Challenges and Prospects


Prof. Eduardo Tovar, PolyTech Inst. of Porto



Start time:

2000-05-25 11:30

End time:

2000-05-25 12:30



Contact person:


Ethernet is the most popular LAN technology. Its low price and robustness, resulting from its wide acceptance and deployment, has created an eagerness to expand its responsibilities to the factory-floor, where real-time requirements are to be fulfilled. However, it is difficult to build a real-time control network using Ethernet, because its MAC protocol, the 1-persistent CSMA/CD protocol with the BEB collision resolution algorithm, has unpredictable delay characteristics.Many anticipate that the recent technological advances in Ethernet such as the emerging Fast/Gigabit Ethernet, prioritization, micro-segmentation and full-duplex operation using switches will also enable it to support time-critical applications.This talk will look at the unpredictability inherent to Ethernet and at recent technological advances towards real-time operation. It will also address recently introduced features such as spanning tree protocols, port trunking and virtual LANs which may potentially enable flexibility and mobility in distributed time-critical systems.