Research on adaptive simulation based on HLA in grid environment

When a distributed simulation based on HLA runs in the Grid Environment, environment changes of grid services may make the model service fail to finish the access of object instances of a federate and result in the simulation termination. A good fault-tolerated mechanism must be introduced into the simulation so that it can adaptively run. In order to satisfy this requirement of distributed simulation in the Grid Environment, the model was firstly designed as a grid service with adaptive capability. Then the local component (LRC) and the core component (CRC) of RTI were modified using web service technology, and two links based on http protocol were set up between the LRC and the CRC. The two components of RTI and the adaptive model-service could communicate with each other by adding some model managing interfaces to HLA, which made the adaptive ability of model service change into the adaptive ability of simulation. Experiment indicates that the adaptive simulation in the Grid Environment has fault-tolerated ability.