分布式虚拟环境的时空一致性研究  

Time-Space Consistency in Distributed Virtual Environments

作　　者：彭宇行[1] 张拥军[1] 李思昆[1] 

机构地区：[1]国防科技大学计算机学院,湖南长沙410073

出　　处：《电子学报》2005年第2期313-316,共4页Acta Electronica Sinica

基　　金：国家 973项目 (No 2 0 0 2CB31 2 1 0 5)

摘　　要：军事仿真是分布式虚拟环境的典型应用 ,时空一致性是其中的一个挑战性问题 .近年来 ,该问题的研究得到了很大的进展 ,出现了诸如本地滞后、时间回卷、推算定位、加锁、令牌等相关技术 ,但都存在其局限性 .本文着重研究分布式虚拟环境中网络传输延时所带来的时空一致性问题 ,分析了引起时空不一致的三个原因 ,提出了“时空状态一致性”的概念、一致性维护方法以及相应的分布式虚拟环境模型 .实验结果表明 ,本文的研究成果可以有效地应用于分布式虚拟环境中 .Distributed Virtual Environments that refer to the distributed computer and network systems are usually applied to simulations, especially to the large-scale battlefield simulations. One of their challenging issues is the time-space consistency problem. In recent years, consistency maintenance in distributed virtual environments is well studied by many researchers. The schemes can be summarized as follows: Local Lag, Time Warp, Dead Reckoning, Lock, Token and so on, but they are far from well studied. This paper focuses on the inconsistency caused by the network transport delays. There are three causes that result in the time-space inconsistency in the Environments. To maintain the consistency, this paper proposes the concept delayed status consistency and the related methods. Based on the concept, a distributed virtual environment model is proposed to make the methods practical for the simulation applications. The experiment result shows that our methods are suitable for the applications in distributed virtual environments.

关 键 词：虚拟现实 分布式虚拟环境 时空一致性 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]