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The composition of large embedded computer systems out of heterogenous clusters requires gateways that resolve property mismatches between networks with different communication protocols and diverse computational models. At the same time, fault and error containment mechanisms are needed in order to prevent common mode failures that could be induced by the propagation of faults between clusters. This paper presents gateways to systematically tackle these challenges. The introduced gateways contain structured collections of time-sensitive variables associated with timing information (called a realtime database). The real-time database facilitates fault and error containment by temporally decoupling clusters.
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