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DDM Implementation in Hierarchical Federations

机译：分层联合中的DDM实现

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摘要

The current implementation of the High Level Architecture (HLA) Runtime Infrastructure (RTI) operates on a single federation only. However, some applications may require that certain information could only be shared among a group of federates and this is difficult to achieve in a flat federation. A hierarchical federation provides a way to enable this selective information hiding. In this paper, we use a strict hierarchical structure in which each federation is connected to an upper level federation through a gateway federate and each gateway federate connects two federations only. To realize HLA services in a hierarchical federation, some extra RTI functionalities have to be provided. This paper gives a solution to realize Data Distribution Management (DDM) in a hierarchical federation. We make use of the middleware and gateway to extend the current RTI functionalities to handle DDM across federations. We compare two algorithms for DDM filtering in a Hierarchical Federation. We will also demonstrate some advantages of a hierarchical federation over a flat federation for the DDM implementation. The grid-based, receiver-based and sender-based approaches are three basic techniques of DDM filtering. Different applications can benefit from different DDM implementations and configurations. In a hierarchical federation, because federates are distributed in separate federations, a flexible approach which incorporates different DDM techniques becomes possible.
机译：当前实现高级架构（HLA）运行时基础结构（RTI）仅在单个联合上运行。然而，一些申请可能要求某些信息只能在一组联合会中共享，并且这很难在平坦联合中实现。分层联合提供了一种方法来启用此选择性信息隐藏。在本文中，我们使用严格的层次结构，其中每个联合通过网关联合连接到上层联合，并且每个网关联邦仅连接两个联合。为了在分层联合中实现HLA服务，必须提供一些额外的RTI功能。本文提供了一种解决方案，用于在分层联合中实现数据分配管理（DDM）。我们利用中间件和网关来扩展当前的RTI功能，以处理联合会的DDM。我们比较分层联合中的两个用于DDM滤波的算法。我们还将在DDM实施的平面联合会上展示分层联合会的一些优势。基于网格的基于接收器和Sender的方法是DDM滤波的三种基本技术。不同的应用程序可以从不同的DDM实现和配置中受益。在分层联合中，因为联合分布在单独的联合中，所以包含不同DDM技术的灵活方法成为可能。

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