Simulation And Validation Framework For Safety-Critical Applications In System-Of-Systems

System-of-Systems (SoS) consist of the complex interconnection of large numbers of networked embedded systems that are characterized by operational and managerial independence of constituent systems, geographical separation, and emergent behavior in a constantly changing environment. The support for real-time communication is of crucial importance for many application areas such as medical, business, and military systems. The scheduling for such complex systems requires corresponding algorithms with additional requirements compared to classic monolithic systems. In this paper, two-level scheduling is assumed to deal with the SoS complexity where the first level is mapping application subsystems to constituent systems and the second level is mapping the application subsystem jobs in each constituent system to the local computational and communication resources to deal with the managerial independence of the SoS. This paper introduces a simulation framework for SoS that supports high-level scheduling as well as low-level scheduling for each constituent system. The proposed framework is built using the OPNET simulator with Time-Triggered Ethernet (TTEthernet) simulation models while the scheduling problem for the constituent systems is solved using IBM CPLEX.