通信网络技术的现状和发展

Present and Future of Communication Network Technology

介绍了电信网络、广播电视网络、计算机通信网络近年来的发展情况和传输方面的新技术，讨论了交换和路由技术在不同网络上的工作性质，介绍了国际上三种网络的技术竞争和行业竞争。重点分析三种网络及其所开展的业务在原理上的相近之处，指出三种网络在业务范围和传输上正在逐步融合。分析了网络融合的具体含义和技术实现途径，讨论了ＡＴＭ（异步转移模式）和ＩＰ（网间协议）这两种网络传输技术在网络融合过程之中可能实现的两条道路———重叠方式和集成方式，推断网络互连和融合可能在接入网技术上率先取得突破。

Introduced are the recent developments and the new transmission techniques of telecommunication networks,television broadcast networks and computer communication networks.The characteristics of the switching technique and the routing allocation technique applied in different networks are discussed,and the international technical competition and trade competition of the three kinds of networks are described.Emphatically,the author analyzes on the principle the similarity of the three kinds of networks and that of their services,and points out the gradual interfusion of the transmission and the services of the three kinds of networks.The concrete implications of the network interfusion and the ways to realize that are analyzed;the two possible methods of the integration of ATM(asynchronous transfer mode)and IP(internet protocol),the overlay method and the peer method,are discussed;and that the access network technique would possibly be the first to break through the barriers to the network interfusion and interconnection is infered.