Global Information Enterprise Simulation (GIESIM) Joint Tactical Information Distribution Systems Simulation Experimentation

摘要

Controlled, bench-test experimentation was performed by PSI to determine loading capacities and scalability associated with the GIESim JTIDS simulation for handling larger scenario sizes and networks of different complexity. The simulation was modified to provide communications capabilities to JASF. The GIESim JTIDS simulation was 'instrumented' to capture and record key internal metrics. An HLA Recorder, Player and Generator was created to stimulate the JTIDS simulation as a surrogate for JSAF and to capture HLA traffic. A driver simulation sent controlled position updates to the simulation under test. Many load factors were measured including HLA overhead, position update rate, size and characteristics of Link-16 networks, network relays, transmission request rates, type and capacity of test PCs, and long term stability. Our overarching conclusion is that the Sim/Real ratio (SRR) is the best indicator of system load on the GIESim JTIDS simulation. Scenarios of 136 Link-16 platforms can easily be supported with position updates of every 10 seconds - typical of what is expected from JSAF. The GIESim JTIDS simulation can be used for experiments of extended duration of many hours. The report includes detailed findings on message latencies, loading, and in-depth analyses of results, and recommendations.