Download A Generic Fault-Tolerant Architecture for Real-Time by David Powell PDF

By David Powell

ISBN-10: 1441948805

ISBN-13: 9781441948809

ISBN-10: 1475733534

ISBN-13: 9781475733532

The layout of desktops to be embedded in severe real-time functions is a posh job. Such structures mustn't ever purely warrantly to satisfy not easy real-time closing dates imposed through their actual atmosphere, they have to warrantly to take action dependably, regardless of either actual faults (in undefined) and layout faults (in or software). A fault-tolerance technique is obligatory for those promises to be commensurate with the security and reliability requisites of many lifestyles- and mission-critical functions. This publication explains the motivations and the result of a collaborative project', whose goal used to be to noticeably reduce the lifecycle expenses of such fault­ tolerant structures. The end-user businesses engaging during this venture already set up fault-tolerant structures in serious railway, house and nuclear-propulsion purposes. besides the fact that, those are proprietary platforms whose architectures were adapted to satisfy domain-specific standards. This has resulted in very expensive, rigid, and sometimes hardware-intensive ideas that, by the point they're built, tested and licensed to be used within the box, can already be out-of-date when it comes to their underlying and software program technology.

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Extra resources for A Generic Fault-Tolerant Architecture for Real-Time Dependable Systems

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For example, the two remote nodes have different physical receivers, so some bits of the first emitted synchronisation message could be degraded and received only by one remote node, and some other bits of the second emitted synchronisation message could be degraded and received only by the other remote node. • Another case, perhaps less intricate, would be to consider a decrease in the transmission speed of one link between its broadcast point and one of the receivers. 2 to occur. Briefly, the technical trade-off is the following: • Assume the possible presence of Byzantine clocks.

In common with the railway and nuclear applications, this instance also features two levels of integrity. mn,nitn'ril~~L:::_-_--::-l----- Backup application plus safety (language Ada 8 3 ) . . . 6 - Space Target Instance (C=4, L=2, 1=2) Like the prototype for the nuclear propulsion application, this instance also possesses two lanes, but for a different reason. For the nuclear application described in the last section, the aim was to allow diversified but equivalent operating systems to be used so that errors due to design faults could be detected.

Then, an abstract modelling viewpoint was devised. This aims to provide a global framework for configuring instances to meet specific application dependability requirements. , [Kanoun et al. 1999]), we investigated a detailed modelling viewpoint that supports incremental and hierarchical evaluation. 2 identifies the various dependability evaluation activities carried out according to these three modelling viewpoints. , a-count [Bondavalli et al. 1997a]) and of specific features for selected instances (phased missions, for the space prototype instance [Bondavalli et al.

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A Generic Fault-Tolerant Architecture for Real-Time Dependable Systems by David Powell


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