In this paper, the properties of distributed virtual environment (DVE) and the requirements on computer networks is briefly reviewed. A multicast protocol, called sender initiated grouping multicast protocol for DVE...In this paper, the properties of distributed virtual environment (DVE) and the requirements on computer networks is briefly reviewed. A multicast protocol, called sender initiated grouping multicast protocol for DVE (SIGMP), is proposed. This new multicast protocol is based on a novel concept, multicast group (MG), which divides all participants in a DVE system into groups, among which there is a multicast group trustee (MGT) node to manage the group. The protocol provides unreliable/reliable, totally ordered and multiple to multiple multicast transmission service for DVE systems without sacrificing the communication efficiency heavily. At the same time, reliable unicast and one to multiple multicast transmission services are also supported. The performance analysis of the new protocols is also presented. Based on SIGMP, a simple demonstration of DVE system is designed and implemented. This demo system is running on several SGI workstations connected by a FDDI and Ethernet network.展开更多
在研究了分布式虚拟地理环境系统的特征和基于Web Service、GI Web Service实现分布式虚拟地理环境系统的优势的基础上，建立了基于Web Service的分布式虚拟地理环境系统的体系结构，最后开展了原型系统试验。结果证明，系统实现了在异...在研究了分布式虚拟地理环境系统的特征和基于Web Service、GI Web Service实现分布式虚拟地理环境系统的优势的基础上，建立了基于Web Service的分布式虚拟地理环境系统的体系结构，最后开展了原型系统试验。结果证明，系统实现了在异构环境下的资源共享和协同工作，基本解决了以往C／S、B／S结构的系统中共享资源只能集中存储在服务器端等难点问题。展开更多
文摘In this paper, the properties of distributed virtual environment (DVE) and the requirements on computer networks is briefly reviewed. A multicast protocol, called sender initiated grouping multicast protocol for DVE (SIGMP), is proposed. This new multicast protocol is based on a novel concept, multicast group (MG), which divides all participants in a DVE system into groups, among which there is a multicast group trustee (MGT) node to manage the group. The protocol provides unreliable/reliable, totally ordered and multiple to multiple multicast transmission service for DVE systems without sacrificing the communication efficiency heavily. At the same time, reliable unicast and one to multiple multicast transmission services are also supported. The performance analysis of the new protocols is also presented. Based on SIGMP, a simple demonstration of DVE system is designed and implemented. This demo system is running on several SGI workstations connected by a FDDI and Ethernet network.
文摘在研究了分布式虚拟地理环境系统的特征和基于Web Service、GI Web Service实现分布式虚拟地理环境系统的优势的基础上，建立了基于Web Service的分布式虚拟地理环境系统的体系结构，最后开展了原型系统试验。结果证明，系统实现了在异构环境下的资源共享和协同工作，基本解决了以往C／S、B／S结构的系统中共享资源只能集中存储在服务器端等难点问题。
