摘要: Embedded systems for safety-critical applications often integrate multiple "functions" and must generally be fault-tolerant. These requirements lead to a need mechanisms services that provide protection against fault propagation ease the construction of distributed fault-tolerant applications.A number bus architectures have been developed satisfy this need. This paper reviews on these architectures, employed, provided. Four representative (SAFEbusTM, SPIDER,TTA, FlexRay) are briefly described.