A hierarchical transaction concept for runtime adaptation in real-time, networked embedded systems

In this work, we consider reliable runtime adaptation in networked, embedded systems with tight real-time constraints. Specifically, we adapt the placement of software components on a multitude of hardware components and show the need for a hierarchical transaction concept in this context. We consider multiple adaptation steps under these hard system constraints and also introduce a model with undesired configurations, which cannot be maintained for an extended time period. Furthermore, we identify cases when adaptation steps can be performed in parallel. Our concept for adaptations is applied to realistic automotive examples, where the feasibility of adaptation in the inactive period of a software component is demonstrated.