Research on time warp mechanism in HLA

HLA (high level architecture) components initiative intends to have a high level of interoperability among simulations and allows maximum components reusability. However, to time warped algorithm, the RTI (runtime infrastructure) servers are difficult to use. This paper outlines two methods in HLA to help optimist federates perform rollback procedures when needed, the common way and the computational reflection way, to implement the mechanism and then to compare them. In the common way, the optimistic federate programming task is heavy, while in using the last way it increases flexibility by adding meta-object, and decreasing programming complexity. The conclusion is, we can add the computational reflection techniques to the HLA time management, and strengthen HLA in optimistic synchronization schemes in parallel and distributed simulation.