Adjusting middleware knobs to suit CPS domains

The large scale and dynamic behavior of cyber-physical systems (CPS) require great effort at the middleware level. Middleware lies at the architectural point where low-level communication and execution meet the horizontal control and orchestration accross nodes and systems. Most realtime research on distributed CPS concentrates on off-line schedulability algorithms for systems with static structure and make heavy assumptions on the network predictability, neglecting the role of the middleware layer. In this paper, we explore the usage of middleware technology to support dynamic and timely execution in CPS, with a middleware design that considers the time requirements of the distributed processes or units . We have carried out a specific implementation that validates or approach, showing a stable service time for large numbers of clients, over an actual network that uses Internet protocols for transport and routing.