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Performance Measurement and Analysis of RTI in the HLA-based Real-time Distributed M-SAM Simulation  

Choi Sang-Yeong (국방대학교 무기체계과)
Cho Byung-Kyu (국방과학연구소 유도무기체계부)
Lee Kil-Sup (국방대학교 전산정보학과)
Publication Information
Journal of KIISE:Computing Practices and Letters / v.11, no.2, 2005 , pp. 149-156 More about this Journal
Abstract
The HLA is the simulation architecture standard that the civilian and military simulation communities are deeply interested in. We can find various successful practices applying HLA to constructive simulations such as war games in domestics and overseas. However, any case of real-time distributed simulations has not been reported. The reason is that a message transmission period via RTI in a network layer varies according to computing power, simulation nodes, transmission types, and packet size; further a message processing time in an application layer depends on its processing methods, thus too difficult to set up real-time constraints for the enhancement of a real-time resolution. Hence, in this paper we have studied the real-time constraints of RTI for the development of the M-SAM simulator. Thus we have developed a HLA based pilot simulator using 6 PC's in LAN and then measured and analysed the performance of the RTI. As the results of our work, we could obtain the quantitative values for message delay, RTI overhead and RTI packet transmission ratio by a real operation scenario and loads, which are not shown in the previous works. We also expect that the results can be used as a guideline to set up the number of targets, transmission frequency and message processing method in the development of the M-SAM simulator and similar applications.
Keywords
HLA(High Level Architecture); Real-Time Distributed Simulation; Performance Analysis; Message Delay; Runtime Infrastructure overhead; M-SAM(Midium-range Surface-to-Air Missile);
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