Device management assembles every individual hardware module into an uniform one , which ensures the other software modules running effectively ; forwarding is a process in which the data package is switched by mac , routed through ip address and forwarded by mpls label ; the control of forwarding is the core of this system , which effectively manages the forwarding path of the data package by every kinds of network protocol 设备管理把各个独立的模块有机的组合成统一的整体，是其它模块的有效运行的保证；转发主要是数据包在交换机中进行二层交换、 ip路由和mpls标签交换的过程；转发控制是系统的核心，通过各种网络协议有效的管理数据包的转发路径。
In this paper , both of the two aspects are studied , and new node models supporting obs multicast are proposed , which are constructed under general multi - protocol label switching ( gmpls ) framework . then based on the models , the function and performance of obs multicast are simulated 结合以上两方面技术发展的需求,借鉴在obs网络中引入通用多协议标签交换( gmpls )的思想,本文研究了基于gmpls的obs组播节点功能机制,并在opnet中开发了节点仿真模型,对其进行了功能和性能上的仿真验证。
We design a new algorithm - pmimd . the emphasis of the paper is to discuss the framework of the mpls network and the support for traffic engineering . i have learned several main topics about the traffic engineering based on mpls : how to map the data into lable ; how to map lable into fec . for the most important topicrhow to map traffic trunk into the actual topological network by lsp , i have designed a kind of adaptive traffic control mechanism called latc . the simulation expriments have proved the validity and the effect of latc 本文还论述了mpls (多协议标签交换)网络的架构及其对流量工程的支持，研究了基于mpls流量工程要解决的几个主要问题：如何把数据包映射为转发等价类，如何把转发等价类映射为流量中继等，并对其中最重要的一个：通过lsp (标签交换路径)把流量中继映射到实际网络拓扑，提出了一种自适应流量控制机制? latc ；通过相应的仿真，验证了该机制实施的合理性和有效性。
The evolution history and trend for ason are analysised in this paper . then it concluded that ason is inevitably to take place of traditional optic network for its explicit defect in meeting requirement of modern service . then it explain the two typical hierarchy and function architecture network models , named overlay model and peer model 论文分析了光网络的发展历史及趋势,指出了传统光网络的不足及引入自动交换光网络的必要性,从层次结构和功能结构两个方面分析了ason的网络体系结构及重叠和对等两种网络模型,论文还分析了通用多协议标签交换( gmpls )协议族及其在ason控制平面中的应用。
The major achievement of this dissertation is outlined in the following : 1 . investigate the potential effect of switch routing on end - to - end service quality with both theoretical and experimental methods : it is found that service quality of lsp is better than that of ip routing if load on router is low or end - to - end bandwidth reservation is implemented , but lsp is more sensible to load on router . mpls must be used in company with policy based routing and packet classification to provide end - to - end qos service in internet ; 2 使用理论分析和实验测试相结合的方法详细分析了交换路由对端到端传输质量的影响：研究表明，在链路轻载或预留带宽的情况下，交换路由系统对数据流的服务质量优于传统路由系统；只有综合应用策略路由、数据报分类调度和标签交换才能有效实现internet环境下对端到端服务质量的控制； 2
