Implementation of DDM in the MAK High Performance RTI

The HLA data distribution management (DDM) services have been implemented in the MAK High Performance Runtime Infrastructure (RTI). The implementation of the DDM services has followed a distributed region approach. This paper describes the distributed region approach and its implementation in the MAK High Performance RTI using multicast groups. The distributed region approach distributes region information throughout the federation to dynamically match publication and subscription regions. The distribution of region information throughout the federation as well as processing updates, interactions, and interest advisories with respect to regions introduces overhead. The paper examines this overhead in relation to RTI and federate processing and network bandwidth. Suggestions for optimizing the use of DDM both internal and external to the RTI are addressed.