A Study on Interconnections Among Intra-University Networks in Japan

我们研究的主要主题是以下内容：（1）在学术环境中建立最佳内部大学网络;（2）通过内部大学网络连接起来的内部大学网络的结构。关于内部大学网络的性能特征，我们已经研究和评估了一些问题。这显然是最重要的，因为活跃网络用户可以与开发高级网络应用合作。关于多媒体通信的环境，这个结束实际上是安装的。更多，关于主题的第二部分，我们已经研究了下面的问题：1）在X下路由算法。25包交换网络2）路由器程序的开发（1）3）在互联网环境中进行了这个程序的实验（4）对互联网管理的研究（5）对TCP/IP和OSI网络之间的互连的研究（第一阶段），我们在七个大规模的互联网-规模计算机中心和NACSIS中构建了，并建立了一个平滑的操作，这个网络被推荐为JAIN （日本学术跨大学网络）。在下一个阶段，一个更大的数目--大学网络已经连接起来。现在，在JAIN看来，这个网络将大大扩大，并将支持日本的多个研究项目。

The main theme of our research is the following :(1) construction of an optimum intra-university network in an academic environment(2) construction of an internetwork connecting the intra-university networks.On the performance characteristics of inter-university networks, we have investigated and evaluated some problems thoroughly. It is shown to be most important that active network users cooperate to develop advanced network applications. The environment of the multi-media communication towards this end is actually installed.Furthermore, on the second part of theme, we have examined the following problems :1) routing algorithm under the X. 25 packet switching network2) development of a router-program for 1)3) experiment with this program in the internetworking environment4) a study on management of internetworks5) a study on interconnection between TCP/IP and OSI networks.In the first phase, we constructed the internetwork among seven largeーscale computer centers and NACSIS, and established its smooth operation.This internetwork is referred to as JAIN (Japan Academic Inter-university network). In the next phase, a large number of intraーuniversity networks have been connected. Now it is anticipated in JAIN that this network will be expanded widely and will support several research projects in Japan.