基于树拓扑结构的多联邦系统

多联邦系统的逻辑结构对系统的开发、运行、以及可扩展性有着重要的影响.提出了基于树形拓扑结构的多联邦系统,在此系统中联邦之间通过代理(proxy)相互连接,每个联邦只与上级和下级联邦存在直接的逻辑连接关系,避免了数据传输多通道问题和传输回路等问题.针对实时树拓扑结构分级多联邦系统,提出了利用运行时间框架(RTI,Run-Time Infrastructure)的时间管理机制对系统的时间推进进行同步的策略,通过合理设置时间主控联邦成员和受控联邦成员,源自根联邦的同步信号能够通过树拓扑结构传递到最底层的叶联邦,从而保证了整个系统在时间推进上的同步.最后分析了系统中同步信号的时间延迟,给出了计算时间延迟的公式.该公式显示,系统分级越多,同步信号的时间延迟越大.

Multi-federation system based on tree-topology

The system logic structure has innumerous effect to the development,execution,and scalability of multi-federation system.A multi-federation system based on tree-topology structure was provided.Federations in the system were connected through proxies.Each federation was connected only with federations directly upper and lower.Thus multi-channels and loops in data transmission were avoided. A strategy was also presented to synchronize time advancement in real time multi-federation systems using RTI(run-time infrastructure) time management.Time-regulation federates and time-constraint federates in multi-federation systems were settled specially to ensure that synchronization signals created in root federation could be transmitted to leaf federations through tree-topology. The synchronization of time advancement of the whole system was realized.The time delay of synchronization signals in system was also analyzed as a result a time-delay formula was given.This formula reveals that more levels in system structure would lead to more delay.