Design and implementation of event-based DEVS execution environment for faster execution of iterative simulation

Discrete EVent systems Specification (DEVS) is one of the most frequently utilized system specifications to model discrete event systems in the real world. To analyze system behavior, simulation results are collected by executing the DEVS model. Although a large number of results are essential for the accuracy of analysis, the existing execution environment we developed is not focused on faster iterative simulation for collecting plenty of data. This paper proposes a new DEVS execution environment applied to event scheduling worldview for faster iterative execution. It proposes an event-oriented DEVS model for simple event scheduling and suggests mediation processes to simulate the DEVS-Compliant model with improved performance, similar to simple event scheduling. This paper discusses a performance test to verify the execution environment. The experimental results show that the proposed environment has significantly shorter execution time. The expectation is that this improved simulation engine will be applicable to iterative DEVS execution for collecting simulation results. It increases the accuracy of system analysis.