Analys och Revision av Ada-System foer Haendelsestyrd Simulering (Analysis and Re-Design of Event-Driven Simulation System in Ada)

摘要

The paper conducts analysis of the existing air-defense system simulation software SILVIA. An improved simulation strategy, message-driven simulation, is proposed instead of the model used in current implementation of SILVIA. Message-driven simulation is an event-oriented simulation model, based on the token passing principle. A mail-box is implemented as the central unit in the system. The mail-box performs message passing from one actor in the system to another. Each message is tagged with the simulated delivery time, and the mail-box delivers messages in delivery time order. Hence, the mail-box performs the task of an ordinary scheduler, as well as its message passing chores. Message-driven simulation combines high performance with abstraction and information hiding to form a powerful tool for the SILVIA system.