Mapping a Multi-Level Scheduling Pattern Language to Distributed Real-Time Embedded

Mission-critical Distributed Real-Time and Embedded (DRE) systems pose significant resource management challenges at and across all architectural levels, i.e., the operating system and low-level middleware on each endsystem, and distributed services spanning multiple endsystems. Furthermore, the challenges posed by one application may differ from the challenges posed by another. As developers of complex DRE applications move increasingly from building individual systems to composing systems of systems, it is imperative to identify approaches that can reconcile design forces throughout a multiplicity of architectural levels and application scenarios. This paper makes two contributions to the design of resource management for DRE systems. First, it describes our recent refinements to a pattern language for resource scheduling in DRE systems. Second, it examines how the pattern language applies to several example DRE systems, thus giving guidance to developers of both individual DRE systems and composite systems