【作者】 钱洁；

【导师】 汪文勇；

【作者基本信息】 电子科技大学 ， 计算机软件与理论， 2004， 硕士

【摘要】 Internet规模迅速扩大,但其基于TCP/IP协议的体系结构一直沿用至今,虽然这种结构是非常成功的,但它依旧存在不少缺陷,其中最为突出的问题之一就是其体系结构所依赖的模型使其缺乏灵活性;随着用户的需求增加,新的网络应用层出不穷,它们需要新的协议和服务支持,而网络中的传输节点功能相对固定,导致协议和服务的推出始终无法跟上应用需求的步伐;另外网络规模日渐庞大而且复杂,使得网络管理、故障定位变得越来越困难;并且互联网中遇到的许多采用传统的方法难以解决的问题,这些问题都需要一种具有自适应、动态和智能化特性的网络体系来解决,而Active Network技术的出现为网络体系结构开辟了一条新的思路,它也为许多在传统网络中解决不是很好的问题提供了新的方法,比如高效的拥塞控制、群组通信、分布式应用、扩展性良好的网络管理、Qos、移动IP等等。本文首先讨论了Active Network的概念及其体系结构,介绍了Active Network的一些应用包括可靠多播、拥塞控制,并着重分析了Active Network在网络管理中的应用及其优势。论文设计了一种新型的基于Active Network技术的分布式网络管理系统,研究了利用Active Network技术解决网络管理问题的结构及协议,并体现了Active Network技术在网络管理中的优势。论文首先对ANTS进行了扩展,使其能更适合网络管理的需要,设计了网络管理中主动包的转发模式,并设计了Active Network模式下的拓扑发现算法、Set、Get等操作、网络性能数据的采集模式等,并对本文提出的几种主动包路径转发算法进行了建模分析,并比较分析了算法的时间、消息复杂度,对比传统SNMP进行了定量分析。在MPR网络流量建模分析基础上,提出了利用Active Network进行MPR流量优化管理的方法,利用Active Network的思想为流量管理问题提供了新的思路,为一些在传统集中管理模式下解决较困难的问题找到了可行的方法,最后设计了ANB_MPRTM模拟实验,并实现了原型系统(ANMS)。更多还原

【Abstract】 With the development of Internet, The TCP/IP protocol is successful, yet it has many limitations such as its lacking extension. With the development of demand by user and the new application, the network framework can’t suit the needs. There are several disadvantages in the traditional networks. Such as the inflexibility of architecture makes new service difficult to be created and deployed, the connectivity of end –to-end network makes resources management inefficient and usage of services of network impotent. To solve this problem, an active network exploits mobile code and programmable infrastructure to provide rapid and specialized service introduction. As novel programmable network architecture, the active network supports the development, verification, and deployment of new network protocols and services. Also, it presents new approaches for network management, new services like reliable multicast, congestion control; web caching QOS control and etc. In the thesis, the correlation notions to active network are presented. The architecture of active network is analyzed. We analyze the inner structure of active node, and the process of packets passing through the active node.An active network application – network management architecture is proposed in this thesis. I describe the design of Active network management system, which provides the properties of distributed control and programmability inside the network. And we design the EANTS to suit our network management. Secondly, we describe the topology discovery arithmetic and performance management problem and analysis some Route exploration algorithms. Thirdly, I presentation of MPR flow management problem and design the model. Finally, a prototype system developed with EANTS is presented, which implements configuration management performance management and etc.更多还原