.hla / Rti In The Region Matching Algorithm Research

DIS(Distributed Interactive Simulation) provide a common architecture for various simulations' cooperation to achieve a given goal. DIS has a great development and is applied to many fields.At present,the new generation architecture of the distributed interactive simulation,HLA, comes forth.lts purpose is to facilitate interoperation among simulations and promote reuse of simulations and their components. Run-time Infrastructure(RTI) software is the core of HLA.lt offers a set of services to support the HLA simulations.The simulations of complex systems are commonly constructed based on the network. Moreover.the simulation systems must be easily scalable.That is to say, The consuming of computing and communicating resources will not affect the simulation systems' running as the expanding of the systems' scale.In RTI,DDM is specially designed to filter data.DDM tranmits the data according to the supply and demand relation among simulation entities.lt can largely reduce data traffic,and reduce the spending on data processing at the same time.In October of 1995, the HLA specifications is developed by the U.S. Department of Defense(DoD) in M&S Master Plan and under changes from then on. Now there are two muture HLA versions: the new IEEE 1516 version of the HLA Specifications and the previous U.S. DoD HLA version 1.3 (HLA VI.3) specifications,and IEEE1516 will be the final vesion of HLA.This paper introduces the differences between two specifications,especially about DDM,and analyses the possible benefit because of these improvement.DDM use region info to describe the supply and demand relation among simulation entities.confirm the aggregate which entities are interested in by region matching.Therefore region matching is the basic of data filtering.This paper discusses detailedly the complexity of region matching process from the point of view of the pure arithmetic and develops a rapid matching arithmetic according to the characteristic of region in IEEE1516.RTI is an integral software system and DDM is only a component part.So this paper discusses the design of RTI prototype based on IEEE1516. We lay a strong emphasis on the study of region matching arithmetic, and implement the interface specification of DDM and some other related interface.