Understanding Replication in Databases and Distributed Systems
ICDCS '00 Proceedings of the The 20th International Conference on Distributed Computing Systems ( ICDCS 2000)
Design Optimization of Time-and Cost-Constrained Fault-Tolerant Distributed Embedded Systems
Proceedings of the conference on Design, Automation and Test in Europe - Volume 2
Timing Analysis of the FlexRay Communication Protocol
ECRTS '06 Proceedings of the 18th Euromicro Conference on Real-Time Systems
Bus access optimisation for FlexRay-based distributed embedded systems
Proceedings of the conference on Design, automation and test in Europe
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In this paper, we present fault-tolerance strategies for implementing passive replication techniques in networked embedded systems based on TDMA-communication such as FlexRay busses. In particular, we assume that processes are replicated at different nodes for tolerating node failures. Hence, if one node fails another node can execute the process and requires the bandwidth for transmitting those messages created by the process over the bus medium. Two concepts are introduced to solve this problem: 1.) to replicate not only the processes but also the messages and to reserve the required bandwidth a priori at design time or 2.) to reconfigure the TDMA-schedule and assign the bandwidth dynamically to the nodes. Obviously, reserving bandwidth for each failure case might lead to a huge overhead and to long response times. Therefore, we provide different reconfiguration strategies for the recently developed FlexRay bus. Moreover, the timing behavior as well as the implementation overhead are evaluated with the help of an experimental setup consisting of five FlexRay nodes.