三网融合的技术现状和未来发展

三网融合是网络发展的主要方向,无线网络是接入有线网络的一个重要途径。本文主要概述了因特网、电信网络、有线电视网络和无线网络的技术现状;分析在三网融合的形势下,它们各自都可以为发展未来包含现在由三种网络提供的所有服务的综合业务网提供核心技术的能力;指出没有单个网络技术能够成为无争议的赢家:融合的网络将具有异构网络集合的特征,提供多种多样的服务;然后在更广阔的视野上阐明了在三网融合之后的未来全局多媒体网络的特征以及建立具有这样的特征的网络所面临的挑战和所需要的变革和创新。

The Preset Technological Condition and Future Developments of the Three Networks Convergence

The three networks convergence is a main direction of network development, and wireless networks will mainly serve as a means of access to the wire-line networks. This paper mainly describes in outline the present technological condition of the Internet, telecommunications networks, cable TV networks, and wireless networks, analyses respectively from a view of the trend of the three networks convergence their capability to provide the core technologies that can be used to develop future integrated service networks that can provide all of the services now provided by the three types of networks. It is pointed out that no single network technology will emerge as the undisputed winner, the converged networks will be characterized by a collection of heterogeneous networks which offer a variety of services. Finally, the paper takes a broader perspective, presents the characteristics of the future global multimedia network that will be seen after the three networks convergence, the challenges that will be confronted with by the researchers and the needed innovations to build the network with these characteristics.