At present , there are a lot of techics on solving heterogeneous data . at first , author analyses and compares with several resolvent , liking the integrated mode based on mutual operation , the integrated mode based on transfer , the integrated mode based on multi - protocol stack and the integrated mode based on multi - interface . their function , performance and applicable range are expatiate 目前解决数据异构的方法很多，首先对目前四种解决模型进行了比较和分析，即基于互操作的集成模型，基于迁移的集成模型，基于多协议栈的集成模型和基于多接口的集成模型，阐述了它们的功能、性能和适用范围，指出了它们在领域工程中的局限性。
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。
Abstract : this article briefly analyses the interrelationship between ip and atm , which are core network technologies , and describers multi - protocol label switching ( mpls ) , a new generation network technology that converges ip and atm , and its role in the process of convergence of the internet and the telecom network 摘要：简要分析了作为网核心技术的ip与atm间相互关系，阐述了作为两者融合的新一代网络技术即多协议标记交换( mpls ) ，以及其在因特网与电信网融合演进过程中的作用。
Based on the degree of urgency of going into graceful ospf restart , the reason of graceful ospf restart is divided into software - restart and hardware - restart , and the way of graceful ospf restart is divided into pre - restart mode and post - restart mode accordingly . after the compare with the traditional ospf realization method and the analysis on the mechanism of the trigger of graceful ospf restart and synchronization of link state database and the exchanging with the route management module ( rtm ) , it is figured out that how to choose the restart mode and how to switch from pre - restart mode to post - restart mode , and how to synchronize the link state database , and how to define the interface and process flow exchanging with protocol supporting module , and how to deal with the forwarding table on the condition of multiple route protocols who also have the capability of graceful restart . finally , the idea of graceful ospf restart with two modes above was realized in the t series routers that belong to a telecommunication corporation 本文首先找出了引起温和重启的各种原因,然后根据温和重启的紧迫程度,提出把温和重启的原因分为硬重启与软重启,并设计相应的前启动模式与后启动模式;结合传统ospf协议的实现方法,通过对其触发机制、数据库同步机制、与支撑模块的交互机制以及多协议同时重启时路由同步机制的分析,解决了在温和重启过程中启动模式如何选择与切换、数据库如何同步、与协议支撑接口如何定义与交互的问题,并揭示出在多协议同时进行温和重启过程中所必须遵循的一般规律,最终在一个通讯企业的t系列路由器上实现了两种模式下基于ospf协议的温和重启。
