宽带综合业务网.doc

ATM 网络性能分析及技术综述中文摘要随着 与多媒体技术的飞速发展,Web 上的图像、音频、视频等多媒体内容越来越多, 用户需要有更高的接入速率。而现有的电路交换和分组交换很难胜任宽带高速的交换任务。异步传输模式 ATM (Asynchronous Transfer Mode) 就是建立在电路交换和分组交换基础上的一种新的交换技术, 它可以很好地进行宽带信息交换。本文主要研究和分析了 ATM 网络技术,在文中,我们着重介绍了 ATM 网络的技术,和网络本身的特性。同时讨论了 ATM 网络所包含的交换技术,控制技术,除此之外,论文简介了 ATM 网络的网络结构, 然后分析和 ATM 网络的信元机构和带宽等特性。同时指出, ATM 网络在其产生以后的发展。关键字: ATM 网络交换技术信息交换 Abstrac t with the rapid development of multi - media technology and the Interne t, There are many Web images, audio, video and other multi - media content, users need to have higher access rate. While the existing circuit switching and packet switching hard-charging broadband high-speed exchange task. Asynchronous Transfer Mode ATM (Asynchronous Transfer Mode) is based on circuit switching and packet switching on the basis ofa new exchange technology, it can be very good for broadband information exchange. This paper mainly studies and analysis the work technology, we mainly introduces work technology, and the characteristics of work itself . then analyze partial structure of fixed length and influence to tape breadth and last probe into ATM technology and emulation. work in exchange with info cell achieved great progress after e out. Key words : ATM(Asynchronous Transfer Mode) information switch technology 一. ATM 的网络性能分析 1、 ATM 的结构 ATM 以信元为基本信息传递单位。 ATM 信元是一种具有固定长度的数据分组。 ATM 信元的结构如图所示: 它由 53 个字节长度构成,其中 5 个字节是信元头, 48 个字节是信息域( 或称净负荷、净