可重构网络宏电路树构建关键技术研究

发布时间：2018-10-24 13:15

【摘要】：目前,随着网络的快速发展,越来越多的用户对数据传输业务要求显著提高,而传统的IP组播技术采用组播树充当数据在网络中传输路径,随着网络中组播数据流数量的迅速增加,网络中的组播树数目大量增加,网络节点维护的组播转发状态急剧增长,内在资源大量消耗,带来庞大的管理开销,导致路由表查询缓慢,数据转发速率下降,传输效率降低等问题,IP组播可扩展性变差,无法满足网络需求。为解决上述问题,增强网络数据传输能力,国家973计划“可重构信息通信基础网络体系研究”项目提出了“宏电路树”的概念,宏电路树是网络为若干具有相似QoS需求的组播数据流所建立的共享组播树,在公共传输路径上采用宏电路传递模式。本文围绕宏电路树构建关键技术进行研究,根据宏电路树功能特点,对宏电路树的网络架构、逻辑模型、构建方法、构建算法和协议设计等进行了研究。主要研究内容如下:1.分析了现有组播传输的研究现状,根据目前IP组播可扩展性差,数据传输效率低下,资源浪费严重等问题,研究了一种新的数据传输途径:宏电路树,它为网络提供了有服务质量保障的可靠数据传输服务,是网络能够满足多样化业务数据传输的有效工具,是可重构网络中重要的基础性数据传输方式。2.对宏电路树的相关基本概念进行定义,研究了宏电路树的网络架构、逻辑模型、构建策略,为以后的宏电路树构建打下了基础。3.在可重构网络环境下,根据宏电路树的结构特点,在具有共同传输路径的骨干网上建立宏电路树,目的是区分类别为特定业务数据流服务,根据特定数据流传输QoS需求分类,为特定类别的流量设定不同类型的宏电路树进行数据传输,实现了特定数据流的快速传输。4.对宏电路树构建算法进行研究,主要根据聚合组播的思想,对宏电路树的算法构建,动态调整算法及宏电路树算法进行研究分析,目的是如何使宏电路树更快速有效地对数据流进行传输。设计一种宏电路树组-树匹配算法,并和原有的组-树匹配算法进行对比分析,实验表明:宏电路树组-树匹配算法在减少带宽浪费、节约资源、提高组播可扩展性方面有明显作用。5.对宏电路树协议进行设计,协议是网络及数据通信的核心,对宏电路树的管理层、控制层、数据层面功能结构进行研究,重点设计了宏电路树的构建和宏电路树标签交换相关协议,其作用是使宏电路树能够快速、高效地传输具有相同路径的数据流。
[Abstract]:At present, with the rapid development of the network, more and more users require more and more data transmission services. The traditional IP multicast technology uses multicast tree as the data transmission path in the network. With the rapid increase of the number of multicast data streams in the network, the number of multicast trees in the network increases greatly, the multicast forwarding state maintained by network nodes increases rapidly, and the internal resources are consumed a lot, which brings huge management overhead. As a result of slow routing table query, low data forwarding rate and low transmission efficiency, the scalability of IP multicast becomes poor, which can not meet the network requirements. In order to solve the above problems and enhance the network data transmission ability, the concept of "macro circuit tree" was put forward in the project of "Research on Reconfigurable basic Network system of Information and Communication" of 973 National Project. The macro circuit tree is a shared multicast tree established by the network for several multicast data streams with similar QoS requirements. The macro circuit transfer mode is adopted in the common transmission path. In this paper, the key technology of constructing macro circuit tree is studied. According to the function characteristics of macro circuit tree, the network structure, logic model, construction method, construction algorithm and protocol design of macro circuit tree are studied. The main contents are as follows: 1. In this paper, the current research situation of multicast transmission is analyzed. According to the problems of poor scalability, low efficiency of data transmission and serious waste of resources in IP multicast, a new data transmission approach, macro circuit tree, is studied. It provides a reliable data transmission service with quality of service, is an effective tool for network to meet the diverse business data transmission, and is an important basic data transmission mode in reconfigurable network. 2. The basic concepts of the macro circuit tree are defined, and the network architecture, logic model and construction strategy of the macro circuit tree are studied, which lays a foundation for the construction of the macro circuit tree in the future. 3. In the reconfigurable network environment, according to the structural characteristics of the macro circuit tree, the macro circuit tree is established in the backbone network with common transmission path. The purpose of the tree is to distinguish the categories for the specific service of business data flow and to classify it according to the requirements of the specific data stream transmission QoS. Set different types of macro circuit tree for specific types of traffic to carry out data transmission, and realize the fast transmission of specific data flow. 4. Based on the idea of aggregate multicast, the algorithm of constructing macro circuit tree, dynamic adjusting algorithm and macro circuit tree algorithm are studied and analyzed. The aim is to make the macro circuit tree transmit the data stream more quickly and efficiently. A tree matching algorithm for macro circuits is designed and compared with the original tree matching algorithm. The experimental results show that the tree group tree matching algorithm of macro circuits can reduce bandwidth waste and save resources. Improve multicast scalability has a significant role. 5. The protocol of macro circuit tree is designed, which is the core of network and data communication. The functional structure of management layer, control layer and data layer of macro circuit tree is studied. The construction of macro circuit tree and the related protocol of label exchange of macro circuit tree are mainly designed. The function of which is to make the macro circuit tree transmit data stream with the same path quickly and efficiently.
【学位授予单位】：解放军信息工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.03

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