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题名:
IP组播技术及其应用
作者: 赵中百
答辩日期: 2002
专业: 计算机应用技术
授予单位: 中国科学院软件研究所
授予地点: 中国科学院软件研究所
学位: 博士
关键词: IP组播 ; 二层组播 ; 组播应用系统
其他题名: IP Multicasting Technology and its Application
摘要: 我们设计并实现了一套基于组播的数字电视演播系统.该文首先详细研究了IP组播技术,随后描述了二层组播协议IGMPSnooping的设计,并在此基础上,介绍了我们所实现的基于IP组播的小区数字电视演播系统.全文共分五章.第一章简单分析了利用IP网络传输实时视频的一些背景知识,主要包括视频传输对IP网络的需求、必要的网络设计和基于IP组播的数字电视演播系统.第二章详细研究了IP组播技术.包括IP组播技术的基本特点、协议、算法、应用和存在的问题.第三章主要描述IGMPSnooping协议,该协议运行在以太网交换机上,用来解决二层组播的溢流问题.第四章介绍了基于IP组播的数字电视演播系统的设计与实现.第五章对IP组播技术和应用进行了总结和展望.
英文摘要: With the increase of network bandwidth requirement and the development of all sorts of new applications, Unicust and Broadcast transmitting modes can not satisfy the need of application development any more. Many new born applications, such as data distributing, remote studying and distributed database, all need that physical network supports multicasting communication mode. Besides, to promote the amalgamation of cable net and computer network, computer network also need to have the multipoint communication ability similar to the traditional cable net. Up to now, Ethernet is the most promising broadband access method. Implementing multicasting communication on Ethernet will be a destining trend for network development. The traditional Ethernet uses sharing medium and multicasting data, is processed as broadcasting data, which wastes network bandwidth and hosts resource largely. In the Switch Ethernet, with the introduction of VLAN, communication can be divided into several regions and different receivers can be separated, and this makes multicasting communication possible. IGMP Snooping, a link layer multicasting protocol, uses IGMP to realize the mapping from IP Multicasting group to link layer VLAN and by this means implements multicasting on Switch Ethernet. A typical Digital TV Broadcasting System is many one-to-many communications. Transferring high quality video streams, such as programs encoded with MPEG2, from a source to multiple destinations, is quite bandwidth-consuming. Compared with using Unicast Technology to implement this function, using Multicasting Technology to implement this function needs to transmit a copy of data only, which can mitigate effectively the burden of the sender and minimize the occupancy of bandwidth. Compared with using Broadcast Technology to implement this function, by tracing those networks in which there is the receiver of the multicasting data, multicasting technology sends the multicasting data only to the networks that contain the receiver of the multicasting data, and the multicasting data will not spread to the networks that do not contain the receiver of the multicasting data. In this way, multicasting not only can implement multipoint communication over different networks but also do not occupy the bandwidth of the networks that do not contain the receiver of the multicasting data. Besides, terminals can filter out the multicasting data they do not need, and this mitigates the burden of the terminals that do not need the data. Using IP Multicasting, we can run more applications on the current network simultaneously. So we have designed and implemented a Digital TV Broadcasting System based on IP Multicasting. In this thesis, I first analyze IP Multicasting technology in detail, then describe the design of IGMP Snooping, and on this basis, introduce our Digital TV Broadcasting System based on IP Multicasting. The thesis consists of five chapters. In the first chapter, we simply analyze the background of transmitting real time video by IP network, mainly including the requirement for IP network to transmit video, necessary network design and the Digital TV Broadcasting System based on IP Multicasting. The second chapter introduces IP Multicasting technology, covering the characteristics, protocols, algorithms, applications and problems of IP Multicasting technology. In the third chapter, we describe IGMP Snooping protocol, which runs in layer 2 Switch Equipments to solve the flooding problem of link layer multicasting. The fourth chapter introduces the design and implement of our Digital TV Broadcasting System based on IP Multicasting. The fifth chapter includes the conclusion and prospect of IP Multicasting Technology and its applications.
语种: 中文
内容类型: 学位论文
URI标识: http://ir.iscas.ac.cn/handle/311060/7190
Appears in Collections:中科院软件所

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Recommended Citation:
赵中百. IP组播技术及其应用[D]. 中国科学院软件研究所. 中国科学院软件研究所. 2002-01-01.
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