摘要现有互联网面临着众多技术挑战,为了更好地解决这些重大技术挑战,各国启动了多项下一代互联网研究计划,开展下一代互联网体系结构和关键技术研究。下一代网络即NGN ,它是一种基于 TDM 的PSTN 语音网络以及基于 IP/ATM 的分组网络融合的产物, 也是我们的交流的平台。所以为了能够更好地构建这个平台,本文从现行网络状态出发, 对下一代网络的关键技术进行研究,即光纤高速传输、光交换与智能光网、宽带接入、 IPv6 、城域网、软交换、3G和后 3G移动通信系统、IP终端以及网络安全,并指出了 NGN 在发展中存在的问题。关键词网络下一代网络关键技术 Abstract The faces many technical challenges. Tosolve these major technical challenges, anumber ofNext-Generation (NGI) research projects have been launched. Next-works (NGN), itisaTDM-based work and PSTN-based IP/ATM work integration ofthe product, but also munication platform. Soinorder tobebetter able tobuild this platform, this paper according the work status toresearch the key technology for next-work ,such ashigh-speed optical fiber transmission, optical switching and intelligent works, broadband access, IPv6, MAN, soft exchange, 3Gand beyond munication systems, IPterminals work security, and pointed out that inthe development ofNGN problems. KEY WORD next-generation key-technology 目录第一章绪言........................................................................................................................................... 1 第一节研究的背景及意义............................................................................................................. 1 第二节国内外现状......................................................................................................................... 2 第二章下一代网络简介......................................................................................................................... 4 第一节下一代网络概念................................................................................................................. 4 第二节下一代网络特点................................................................................................................. 4 第三章现有网络存在的问题和面临的挑战......................................................................................... 5 第一节安全性与健壮性..............................................................................................................
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