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近几年来Internet的发展非常迅猛,网络用户经常感觉到带宽的不足,虚拟现实、多媒体等需要高带宽的技术因无法达到真正的实时要求而难以进入应用领域。为此世界各国纷纷提出了提高带宽的新技术、新方案,并且进行了大量的区域性试验。通信网、计算机网和有线电视网的“三网合一”,使Internet业出现了技术融合、业务融合、市场融合的大趋势,并正引导着三网的互相转化及产业结构的调整。
In recent years, the development of the Internet is very rapid. Network users often feel the lack of bandwidth. Virtualization, multimedia and other technologies that require high bandwidth are difficult to enter the application due to the inability to meet the real-time requirements. To this end all countries in the world have put forward new technologies and new solutions for increasing bandwidth, and carried out a large number of regional experiments. The “triple play” of communication network, computer network and cable television network has led to the trend of convergence of technology, business integration and market integration in the Internet industry and is leading the transformation of the three networks and the adjustment of industrial structure.