由于计算资源、网络资源以及现有技术的限制，协同虚拟环境的扩展性问题至今没有得到很好的解 决。针对这一问题，讨论了大规模协同虚拟环境的通信模式，提出了一个基于开放网格服务结构OGSA的协 同虚拟环境体系结构，利用网格服务封装将系统功能实现与具体的物理资源相分离以达到系统可扩展的目 的。另外，还重点研究了影响协同虚拟环境扩展性的关键技术———虚拟世界管理服务以及相关的支撑服务。 最后基于Globus Toolkit开发了一个协同虚拟环境示例程序，验证所提出的框架和方法的可行性。

Limited by computing resource, network resource and today's technologies, the scalability of collaborative virtual environment(CVE)has not been efficiently solved until now. The paper discusses the communication model of large-scale CVE first and then devises a CVE architecture based on open grid services architecture(OGSA). Utilizing grid service the CVE architecture separates CVE function realizations from physical resource to solve the scalability of CVE. In addition, the paper focuses on the research of virtual world management service and some related services such as interest management service, consistency management service and concurrent management service which are key issues to solve the scalability of CVE. At last, a CVE case based on Globus Toolkit is developed to validate the feasibility of the proposed CVE architecture and methods.

张谞（1981－）男，江苏宿迁市人，南京理工大学计算机科学与技术学院博士研究生，主要研究方向为协同虚拟现实、应用层组播