Talks and Poster Presentations (with Proceedings-Entry):

R. Obermaisser, P. Peti, H. Kopetz:
"Virtual Networks in an Integrated Time-Triggered Architecture";
Talk: IEEE International Workshop on Object-Oriented Real-Time Dependable Systems (WORDS), Sedona, Arizona; 2005-02-02 - 2005-02-04; in: "Proceedings of the 10th IEEE International Workshop on Object-Oriented Real-Time Dependable Systems, 2005", (2005).

English abstract:
Depending on the physical structuring of large distributed
safety-critical real-time systems, one can distinguish
federated and integrated system architectures. This paper
investigates the communication services of an integrated
system architecture, which combines the complexity management
advantages of federated systems with the functional
integration and hardware benefits of an integrated
approach. A major challenge is the need to accommodate
the communication services to the different types of
integrated application subsystems that range from ultradependable
control applications (e.g., an x-by-wire system)
to non safety-critical applications such as multimedia or
comfort systems. In particular, the encapsulation of the
communication activities of different application subsystems
is required not only to prevent error propagation from
non safety-critical application subsystems to higher levels
of criticality, but also to facilitate complexity management
and permit independent development activities.

This paper introduces virtual networks as the encapsulated
communication infrastructure of an application subsystem
in the integrated DECOS architecture. Virtual networks
are constructed as overlay networks on top of the
time-triggered communication system of a base architecture.
Each virtual network runs a corresponding communication
protocol that is determined either by a legacy platform
or selected to meet the requirements of the application
subsystem. Encapsulation mechanisms ensure that the temporal
properties of each virtual network are known a priori
and independent from the communication activities in other
virtual networks. By assigning to each application subsystem
a dedicated virtual network and by ensuring that the
virtual network abstractions hold also in the case of faults,
the integrated architecture supports the benefits of a federated
system, such as fault isolation, complexity management,
independent development, and intellectual property
protection. In addition, virtual networks promise massive
cost savings through the reduction of physical networks and
reliability improvements with respect to wiring and connectors.

Online library catalogue of the TU Vienna:

Created from the Publication Database of the Vienna University of Technology.