Development of Hierarchical Multi-media Information Networks

分层网络结构适用于宽带ISDN，它以唯一的网络接口支持各种业务。分层网络由超高速广域网、高速城域网和局域网组成。本课题的目的是研究B-ISDN的分层组织技术，取得了如下成果：1.高速传输控制技术：准STM方案我们提出了一种Q-STM方案，它保证ATM网络中没有信元丢失和延迟抖动。我们提出了一种业务控制方案，它对ATM网络中UNI的业务特性进行管理。本文提出了一种基于捕获效应的分组无线网接入控制方案。城域网性能分析了FDDI网络的性能，FDDI网络有望成为城域网的主流网络.互连与网间技术MAN-ATM互通我们提出了一种通过ATM网实现城域网互连的流量控制方案。它使用反馈信息进行缓冲区保护和带宽评估。分组无线网-ATM互通提出了利用终端移动方向的切换方案。提出了分组无线网的并行信元传输方案，它提高了传输速度，并能与ATM网互通。[国际研讨会] 1993年11月在大坂大学举办了国际研讨会。三位美国合作研究人员都受到了邀请。本项目的所有研究人员都介绍了他们在本项目中取得的研究成果。来自日本和其他国家的许多研究人员参加了研讨会。

Layered network organization is suitable for Broadband ISDN which support various traffic with a unique network interface. The layerd network is constructed with very high speed WAN, high speed MAN and LAN. The purpose of this project is a development of layered organization technology for B-ISDN and we got following results.1. High-speed transmission control technology.Quasi-STM schemeWe propose a Q-STM scheme which guarantees no cell loss and no delay jitter in the ATM networks..Traffic control schemeWe propose a traffic control scheme which polices traffic characteristics at the UNI in the ATM networks..Access control schemeWe propose an access control scheme for the packet radio networks, which makes use of capture effect..MAN performanceWe analyze the performance of FDDI networks which are expected to be a popular network of MAN.2. Interconnection and internetwork technology.MAN-ATM interworkingWe develop a traffic control scheme for MAN interconnection through the ATM network. It uses feedback information for buffer protection and bandwidth evaluation..Packet Radio Network-ATM interworkingThe hand over scheme which makes use of direction of terminal movement is proposed. And parallel cell transmission scheme for the packet radio networks which improves transmission speed and enables interworking with the ATM networks is proposed.[International Symposium]We held an international symposium on November 1993 at Osaka University. All three American cooperative researchers were invited. All researchers in this project made presentation of their research results obtained in this project. Many researchers from Japan and other countries attended the symposium.