论文标题:NGN工程组网应用设计
Application Design of NGN Network
论文作者 丁义
论文导师 孟晓景,论文学位 硕士,论文专业 软件工程
论文单位 山东科技大学,点击次数 756,论文页数 69页File Size2805k
2004-05-01论文网 http://www.lw23.com/lunwen_87237/ 下一代网络;软交换;叠加网;融合网;服务质量
NGN ,softswitch, cascade nerwork, amalgamation network ,QoS
公用通信网主要有PSTN电话网、数据网、以及这两种网络业务的支撑网。随着通信与计算机技术的紧密结合和用户业务的不断发展，网络融合的概念被提出，未来的电信网将趋向于只建设一个核心网——下一代网络(NGN)。它以开放的网络平台为基础，以业务与控制相分离的软交换技术为核心，同时承载话音业务、数据业务、图像业务，为用户提供整体业务解决方案。本文首先概述了下一代网络的体系结构和特点，然后根据城域网的各种组网方式，对下一代网络NGN的承载网网络结构进行了分析，探讨了如何在充分利用现有的网络资源的基础上，完成向NGN的平滑过渡。NGN承载网可构建为叠加网和融合网两种网络拓扑结构，NGN承载网的IP地址分配、网络安全及网络QoS保证与承载网的网络结构有着密切的关系。通过结合当前通信网的具体组网方式，对叠加网和融合网这两种网络结构进行了设计，并分析比较了它们各自的优缺点，特别是对IP地址分配提出了相应的规划方案，分析了目前引人关注的QoS策略的实施。在用户接入层，运营商已投入了大量的资金，基本完成了户线工程，并已布放了大量的光缆，部分用户已实现了五类线、ADSL等接入手段入户。本文根据现有城域网的实际情况，提出了接入层的NGN演进策略，给出了城域网光缆物理层的优化方法。对集团用户、校园网、小区用户的NGN接入方式设计了具体的接入方案。最后，给出了一个NGN工程组网设计实例。
The public communication network consists of PSTN network, data network and the network supporting these two kinds of network service. With increasing development of close combination of communication and computer technology as well as users" business, the concept of network amalgamation was put forward to. The future telecom network wouldtend to be a kernel nerwork-next generation network (NGN). NGN was based on opennetwork platform and its key technology was Softswitch which separate service from control. At the same time, audio service, data service and video service were carried and comprehensive service resolving project for users was provided by it.The system structure and features of NGN were summarized at first in this dissertation, then carrying network structure of NGN was designed and analyzed according to various combination way of MAN. Exploration on how to use existing network resources to transit smoothly to NGN was carried out. Carrying network can be built as two kinds of topo structures such as cascade nerwork and amalgamation network. IP address assignation, nerwork security and network QoS safeguard of NGN are closely related to the strucutre of carrying nerwork. The dissertation designed the two kinds of nerwork structures in the way of practical combination with existing communication network. And then compared the advantages and disadvantages between them. Especially, respective projects on IP address assignation were put forward to. Practice of QoS strategy which catched people"s eyes at present was analyzed too. In access layer, telecommunication company had invested much, and houseline engineering had almost been completed. A large quantity of fiber cable has been laid. A part of house-users had realized the connection by five-catelogy-cable and ADSL.This dissertation put forward to evolution strategy of NGN in access layer according to practical case of MAN. The optimizing method of fiber cable in physical layer of MAN was provided. Practical access way of group users, campus network, and zone users was disigned. At the end of this dissertation, a sample of network design of NGN project was provided.
|
