Design and modeling techniques for real-time RTI time management

The design and implementation of an RTI includes several HLA services, a very important one being the time management. Several time management protocols exist ranging from the Chandy-Misra-Bryant (CMB) null message conservative algorithm up to optimistic Jefferson time warp one. We are interested in enhancing the highand/or real-time performance of our open source RTI (CERTI) including the time management protocol. In order to achieve these goals we explored two complementary approaches, first, design a new conservative time management algorithm which avoid the time creep problem of classical CMB and then apply model-checking techniques and tools to specific real-time federation in order to formally ensure the validity and the complexity of the algorithms on those federations. We will present in this paper a new conservative time management algorithm and the beginnings of modelchecking techniques applied to predict and ensure the real-time performance of specific federation.