NDLI: An integrated architecture for dependable embedded systems

Content Provider	IEEE Xplore Digital Library
Author	Kopetz, H.
Copyright Year	2004
Description	Author affiliation: Inst. fur Technische Informatik, Vienna Univ. of Technol., Austria (Kopetz, H.)
Abstract	Summary form only given. A federated architecture is characterized in that every major function of an embedded system is allocated to a dedicated hardware unit. In a distributed control system this implies that adding a new function is tantamount to adding a new node. This has led to a order to achieve some functional coordination. Adding fault-tolerance to a federated architecture, e.g., by the provision of triple modular redundancy (TMR) leads to a further significant increase in the number of nodes and networks. The major advantages of a dedicated architecture are the physical encapsulation of the nearly autonomous subsystems, their outstanding fault containment and their clear-cut complexity management (independent development) in case the subsystems are nearly autonomous. An integrated distributed architecture for mixed-criticality applications must be based on a core design that supports the safety requirements of the highest considered criticality class. This is of particular importance in safety-critical applications, where the physical structure of the integrated system is determined to a significant extent by the independence requirement of fault-containment regions. The central part of an integrated distributed architecture for time-critical systems must provide the following core services: deterministic and timely transport of messages; fault tolerant clock synchronization; strong fault isolation with respect to arbitrary node failures; and consistent diagnosis of failing nodes. Any architecture that provides these core services can be used as a base architecture for an integrated distributed embedded system architecture. An example of such an integrated architecture is the time-triggered architecture (TTA). In this contribution we describe the structure and the services of the TTA that has been developed during the last twenty years and is deployed in a number of safety-critical applications in the transport sector.
Sponsorship	IEEE Comput. Soc. Tech. Comm. on Distributed Process
Starting Page	160
Ending Page	161
File Size	212729
Page Count	2
File Format	PDF
ISBN	0769522394
ISSN	10609857
DOI	10.1109/RELDIS.2004.1353016
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-18
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Embedded system Hardware Distributed control Fault tolerance Redundancy Encapsulation Safety Time factors Fault tolerant systems Clocks
Content Type	Text
Resource Type	Article
Subject	Theoretical Computer Science Computer Networks and Communications Software Hardware and Architecture

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