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Hauptseminar - Hauptseminar: Prinzipien Vernetzter Systeme (SS16)

Hauptseminar -- Prinzipien Vernetzter Systeme: Time-Sensitive Networking
Dozent Dr. rer. nat. Frank Dürr
Umfang2 SWS
Sprache Deutsch
Studiengänge Master, Diplom Hauptstudium
Zielgruppe Softwaretechnik, Informatik

For many systems, predictable latency is a critical requirement. For instance, controlling a robot or drone from a remote controller is highly time-sensitive. In such networked control systems, long network delays for communicating sensor values or control commands between robot/drone and controller might lead to degraded control performance. Ultimately, a collision or crash might be the consequence. Many more examples of such time-sensitive systems can be found in manufacturing (Industry 4.0), the Internet of Things (IoT), online gaming, avionics, etc.

In this seminar, we will discuss networking aspects of such time-sensitive systems. On the one hand, we will consider systems requiring hard deterministic time bounds as already mentioned in the examples above. On the other hand, we also consider soft-realtime systems, e.g., an interactive system, which should return a response within a certain timespan with high probability, but can also tolerate some missed deadlines.   

Traditionally, field buses like CAN or Profibus have been used to achieve deterministic latency bounds. Therefore, field buses are one topic to be discussed in this seminar.

Beyond these classic approaches, time-sensitive networks have also caught the attention of major standards bodies like IEEE and the Internet Engineering Taskforce (IETF) lately, who strive for time-sensitive layer 2 (switched) and layer 3 (routed) packet-switched networks, respectively. In this seminar, we will discuss their efforts to support time-sensitive and deterministic networking, e.g., precise time synchronization (e.g., Precision Time Protocol (PTP)), resource management, and packet scheduling, e.g., from the IEEE Audio Video Bridging (AVB) and Time-sensitive Networking (TSN) standards.

Another topic is the support of soft realtime requirements in Cloud data center networks.

We will also have a look into networking technologies used in specific application domains such as avionics, e.g., the Avionics Full DupleX Switched Ethernet (AFDX), as well as developments in 5G mobile networks.  

Finally, we will also consider complementary methods to minimize latency such as distributing functions to an Edge Cloud infrastructure close to the end systems (e.g., located in the access networks) to avoid communication with distant Cloud data centers. 


  • Registration starts January 11th, 2016 (central online registration)

Basic knowledge of computer networks.

Reports and talks can be either in German or English. Thus, English speakers are required to understand German and vice versa to understand the other talks (but you are free to choose the language of your own talk and report).