Optimistic I/O

This work uses faster-than-real time simulations to support inclusion of sophisticated, computation intensive, software for phenomenology models (e.g., software to generate images seen by satellite senors for earth launched misiles) in real-time synthetic environments. To hide the latency associated with the phenomemology model software, a faster-than-real-time simulation is executed on a parallel computer to predict what images are needed in advance, allowing dynamic, pre-computation of images. For example, once a launch is detected, the missile's flight path can be computed and computation of images associated with the flight can begin. The faster-than-real-time simulation engine must be able to accomodate unexpected real-time, external events (e.g., a missile intercept launch) which may invalidate some pre-computations. A demonstration has been developed integrating the Synthethic Scene Generation Model (SSGM) phenomenology model software developed at the Naval Research Laboratory with a simulation application executing on Georgia Tech Time Warp (GTW).

Publications

• M. Hybinette and R. M. Fujimoto, ``Optimistic Computations in Virtual Environments,'' Proceedings of the Western Simulation Multiconference, January 1999.

(PS.Z 224 K)