经济全球化和信息网络化的进程日益加快,互联网应用呈爆炸性增长,导致宽带网络业务需求急剧上升,网络的宽带化已成为建设信息高速公路的必然和发展重点。实现网络的宽带化,不仅需要继续拓展骨干网、城域网的带宽,而且必须解决好社区接入网的带宽问题。为此,受信息产业部政策法规司委托, The process of economic globalization and information networking is accelerating day by day. The explosive growth of Internet applications has led to a sharp rise in the demand for broadband network services. The broadband network has become an inevitable and important point for the construction of information superhighways. To achieve broadband network, not only need to continue to expand the backbone network, metropolitan area network bandwidth, and must solve the problem of community access network bandwidth. To this end, the Ministry of Information Industry Policy and Regulation Department commissioned,