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A Cascading Redundancy Approach for Dependable Real-Time Systems

Fulltext:


Authors:

Hüseyin Aysan, Radu Dobrin, Sasikumar Punnekkat

Research group:

Dependable Software Engineering

Publication Type:

Conference/Workshop Paper

Venue:

15th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications

Abstract

Dependable real-time systems typically consist of tasks of multiple criticality levels and scheduling them in a fault-tolerant manner is a challenging problem. Redundancy in the physical and temporal domains for achieving fault tolerance has been often dealt independently based on the types of errors one needs to tolerate. To our knowledge, there had been no work which tries to integrate fault tolerant scheduling and multiple redundancy mechanisms. In this paper we propose a novel cascading redundancy approach within a generic fault tolerant scheduling framework. The proposed approach is capable of tolerating errors with a wider coverage (with respect to error frequency and error types) than time and space redundancy in isolation, allows tasks with mixed criticality levels, is independent of the scheduling technique and, above all, ensures that every critical task instance can be feasibly replicated in both time and space.

Bibtex

@inproceedings{Aysan1453,
author = {H{\"u}seyin Aysan and Radu Dobrin and Sasikumar Punnekkat},
title = {A Cascading Redundancy Approach for Dependable Real-Time Systems},
month = {August},
year = {2009},
booktitle = {15th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications},
url = {http://www.es.mdu.se/publications/1453-}
}