Optimum Architecture of ATM Switch with Large Capacity in the Broadband ISDN

在这项研究中，我们重点研究了有望容纳大量业务的光波网络，并对它们的性能进行了分析。通过研究取得的成果总结如下：(1)对我们去年提出的光波Newtork RookNetRookNet进行了改进，最大吞吐量达到了0.4左右。在研究中，我们使用了一些不同的协议，如选择性重传协议，而不是类似停止和等待的协议，将其最大吞吐量提高到0.8左右。(2)在RookNetIn RookNet的可扩展性方面，每个节点需要2(N-1)个接收器(或过滤器)来构建一个由N×N个节点组成的网络。我们提出了具有时分多址的RookNet方案，该方案可以将N×N的网络扩展到2(N=1)×2(N-1)的网络，而每个节点的接收器数量固定为2(N-1)。结果表明，网络的总最大吞吐量随着节点数目的增加而增加，而每节点的最大吞吐量则减小。(3)在最优网络配置上，可以通过重新调整接收器和发射器来逻辑地改变光波网络的配置。给定一对节点之间传输的通信量，我们正在开发算法，以获得实现最大吞吐量的最佳配置。

In this study, we have focused on lightwave networks which are expected to accommodate a large amount of traffic, and analyzed their performance. The results obtained through the research are summarized as follows.(1) Improvement of lightwave newtork RookNetRookNet we proposed last year has achieved a maximum throughput of about 0.4. In the study, we have improved its maximum throughput to about 0.8 by using some different protocol like Selective-repeat Protocol instead of a Stop-and-wait like protocol.(2) On a scalability of RookNetIn RookNet treated so far, each node needs a number of 2(N - 1) receivers (or filters) in order to construct a network of N x N nodes. We have proposed RookNet with TDMA scheme in which a network of N X N can be extended to that of 2(N = 1) X 2(N -1) while the number of receivers per node being fixed at 2(N - 1). We have shown that the total maximum throughput over a network increases as the number of nodes increases, whereas the maximum throughput per node decreases.(3) On the optimum network configurationConfiguration of lightwave networks can be logically canged by retuning the receivers and transmitters. Given the amount of traffic transmitted between a pair of nodes, we are developing the algorithm to obtain the optimum configuration that achieves the highest maximum throughput.