Research on Web-Enabled RTI under grid condition

The realization of the federate ambassador callback becomes a key problem of Web-Enabled RTI, because the local RTI and the central RTI component must communicate with SOAP protocol when they are used by HLA-based Simulations in the grid environment. Although the federate ambassador callback based on SOAP protocol has been realized by XMSF and DS-Grid, it can hardly pass through firewalls in grid. In order to solve this problem, a receiving grid service and a dispatching demon process were added to each local RTI component, and the central RTI component was encapsulated into a grid service. So two links based on HTTP protocol were set up between the local RTI component and the central RTI component, and the callback problem could be solved by allocating one of the two links to the federate ambassador. A benchmark experiment indicates that this kind of Web-Enabled RTI based on SOAP and HTTP protocol can not only support simulation under grid condition, but also be shared as a grid service resource.