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很多分布式多媒体应用(如计算机会议、远程教学、远程会诊等)都属于组应用,需要组通信机制的支持。因此,组通信成为分布式多媒体系统中的一个重要的研究方向。多媒体组通信对网络技术、通信协议、操作系统等都提出了很多新的要求。尽管人们已经对如何支持传统的分布式组应用(如复制文件系统、分布式目录服务等)进行了深入的研究而且取得了很多有价值的成果,但是对如何支持分布式多媒体组应用的研究才刚刚起步,还有很多理论与
Many distributed multimedia applications (such as computer conferencing, distance learning, teleconsultation, etc.) belong to a group application and require group communication mechanism support. Therefore, group communication becomes an important research direction in distributed multimedia system. Multimedia group communication on the network technology, communication protocols, operating systems, etc. have made many new requirements. Although people have conducted in-depth research on how to support traditional distributed group applications (such as copy file system, distributed directory service, etc.) and have achieved a lot of valuable results, research on how to support distributed multimedia group applications Just started, there are many theories and