Talks and Poster Presentations (with Proceedings-Entry):

T. Losert, W. Elmenreich, M. Schlager:
"Semi-Automatic Compensation of the Propagation-Delay in Fault-Tolerant Systems";
Talk: IASTED International Conference on Communications, Internet, and Information Technology (CIIT 2004), US Virgin Islands; 2004-11-22 - 2004-11-24; in: "Proceedings of the Third International Conference on Communications, Internet, and Information Technology (CIIT 2004)", ACTA Press, (2004), ISBN: 0-88986-445-4; 455 - 460.

English abstract:
In control systems the jitter is a major problem since in a time-varying system the theoretical results for analysis and design of time-invariant systems cannot be used directly. Reducing the jitter increases the stability of the closed control-loop thus leading to enhanced reliability.

This paper presents a general model that can be applied to bus topologies as well as to star topologies. Based on this model an algorithm is presented that allows to improve the precision of a set of distributed clocks by measuring the propagation delay of the communication lines and compensating the jitter introduced by the propagation delay.

Some fault-tolerant architectures already provide means for coping with propagation delays but require manually entering the values in a configuration-tool. With this algorithm the system supports this errorprone task by providing validity checks for the entered values or measuring these values automatically thus rendering this maintenance step obsolete.

Online library catalogue of the TU Vienna:

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