Evaluation and Development of Traffic Control Methods for Very High Speed Communication Networks

超高速通信网络流量控制方法的评估和开发

基本信息

批准号：
04650288
负责人：
MIYAHARA Hideo
金额：
$ 1.28万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1994
项目状态：
已结题

项目摘要

In this project, we evaluate and develop the traffic control methods suitable to high speed networks, especially dedicated to ATM networks. We first discuss on the effect of statistical multiplexing gain when the multiple traffic classes including voice, motion video and file transfer co-exist in the network. We further address the effectiveness of priority control when the multimedia traffic with different quality of service are handled in the network. Then, we evaluate the highly reliable data transport protocol using FEC (Forward Error Correction) method. By this study, it is demonstrated that FEC can be suitable as a future data transport protocol to attain the very low cell loss probabilities. The rate-based congestion control is applied to data transfer in the future ATM-based betworks. Our next contribution is that the analysis method for the rate-based congestion control is developed. Through the numerical examples, we show its implementation method of the ATM switch for effective and simple traffic control method. The analysis result for maximum queue length observed at the switch can be used for buffer dimensioning in designing the ATM switch. In the future high speed networks, the real time traffic such as motion video should also be supported in addition to the data transfer. In the case, the synchronization mechanisms among the media becomes important.We have poposed three synchronization mechanisms and implemented all of these methods on Harmony, which is our hyper-media system running on the UNIX-based workstation. While the proposed mechanisms are supported at the application level, it is useful when the system is used as the presentation system.

在此项目中，我们评估并开发了适用于高速网络的流量控制方法，特别是专门用于ATM网络。我们首先讨论统计多路复用增益的效果，包括网络中的多个流量类别，包括语音，运动视频和文件传输共存。当网络中处理具有不同服务质量的多媒体流量时，我们进一步解决了优先控制的有效性。然后，我们使用FEC（正向误差校正）方法评估高度可靠的数据传输协议。通过这项研究，证明FEC可以作为未来的数据传输方案，以达到非常低的细胞损失概率。基于费率的拥塞控制应用于将来基于ATM的BETWORKS中的数据传输。我们的下一个贡献是开发了基于费率的拥塞控制的分析方法。通过数值示例，我们显示了其ATM开关的实现方法，以实现有效和简单的交通控制方法。在开关时观察到的最大队列长度的分析结果可用于设计ATM开关时的缓冲尺寸。在将来的高速网络中，除数据传输外，还应支持实时流量（例如运动视频）。在这种情况下，媒体之间的同步机制变得很重要。我们构成了三种同步机制，并在Harmony上实施了所有这些方法，这是我们在基于UNIX的工作站上运行的超媒体系统。虽然提出的机制在应用程序级别上受支持，但当系统用作演示系统时，它很有用。