MPLS与IP组播技术的融合

介绍了MPLS和IP组播技术,分析了MPLS和IP组播融合的可能性、存在的问题和涉及的相关技术问题,提出了建立组播树、标签分配和驱动模式的具体解决方案,最后讨论了在密集和稀疏两种模式下MPLS组播的实现。     

基于MPLS VPN的组播研究

研究了基于多协议标签交换（MPLS）的虚拟私有网络（VPN）技术原理,给出了基于MPLS VPN的组播模型,同时对该模型涉及到的关键技术包括标签交换的发起方式、信令选择、组播路由协议及对MPLS VPN组播实现技术的影响进行了分析,在解决实际网络应用时,不仅考虑了其技术的可行性和先进性,还考虑了目前网络中采用协议的兼容性。并提出了一种可行的MPLS VPN组播方案。     

IP组播技术原理及广东电信IP组播试验[1]

１组播技术概述组播（Multicast）又称为多播、多址广播、多地址广播和成组通信等，是相对于单播和广播方式而言的一种网络通信方式。IP组播技术作为IP网络中主机之间通信的一种模式，是通过组播地址寻址，向所有网络节点中某个确定子集（该子集被称为组播组）的成员发送数据包的技术。它的基本思想是源主机只需发送一份数据，属于该子集的所有接收者都可以收到相同的数据拷贝，而不属于该子集的主机则不能接收该数据拷贝。IP组播技术有效地解决了单点发送多点接收和多点发送多点接收等问题，实现了IP网络点到多点的高效数据传输。与传…     

IP组播技术原理及广东电信IP组播试验[2]

2.2跨域方式下组播的实现1992年3月第一个组播主干网MBONE（MulticastBONE）采用的是DVMRP，为了能在Internet上实现大范围的组播，必须采用DVMRPTunnel方式将各个开通组播的区域连接起来。但由于DVMRP采用FloodandPrune方式，并且由于该协议基于RIP协议，因此它并不适于大范围的组播应用。现阶段大范围组播是通过跨域组播方式实现的，它以PIM-SM为基础，通过MBGP（MultiprotocolBorderGate鄄wayProtocol，多协议边界网关协议）和MSDP（MulticastSourceDiscoveryProtocol，组播源发现协议）实现。在跨域组播方式下，…     

组播在MPLS VPN网络中的实现

组播作为一种高效的大数据量传播方式,以其对网络资源的优化利用得到了业界广泛的认可;新兴MPLS VPN 技术以优秀的流量管理、服务质量保证及较高的安全性为传统的纯IP数据网络解决了数据的流量平衡、业务流的服务质量及企业通过公共网互联的安全问题.组播技术与MPLS VPN技术的结合将为运营商提供一个前所未有的多业务发展空间.     

组播在MPLS VPN 网络中的实现

组播作为一种高效的大数据量传播方式,以其对网络资源的优化利用得到了业界广泛的认可;新兴MPLS VPN 技术以优秀的流量管理、服务质量保证及较高的安全性为传统的纯IP数据网络解决了数据的流量平衡、业务流的服务质量及企业通过公共网互联的安全问题.组播技术与MPLS VPN技术的结合将为运营商提供一个前所未有的多业务发展空间.     

MPLS VPN组播的研究与仿真

对MPLS VPN特有的组播问题进行了分析和研究,比较了现有各种组播实现方案的优缺点.在此基础上,提出了一种改进的MPLS VPN组播实现方法--组播域显式组播路由法.最后进行了仿真,验证了改进方案的可行性、实用性和优越性.     

MPLS网络中DiffServ组播算法

文章提出一种在多协议标签交换(MPLS)网络中边界路由器实现组播和区分服务的算法,该算法利用处于分支点的边界路由器之间的标签交换路径来传输组播数据包,同时引入了信息管理点,用于计算、管理和调整组播树,实现全域的服务质量.描述了算法的具体细节和实现原理,也评价了该算法的可行性和优越性.     

IP组播技术在多协议标记交换(MPLS)中的应用

对MPLS和组播技术分别进行了介绍，详细论述了IP组播技术在MPLS中的应用、与MPLS技术相关的组播特性以及这些特性与各组播路由协议的对应关系，并阐述了组播VPN在MPLS VPN中的应用。     

MPLS组播及其可扩展性的研究

介绍了一种基于MPLS组播实现的新方法--状态编码法.通过分析该方法的原理,并与其他已提出的方法做比较,得出该方法可以减少标签的使用数量,占用更少的存储空间.有效地解决了MPLS网络的扩展性问题.     

Scalable Multicast Provisioning in DiffServ with MPLS Labeling

The phenomenal growth of multimedia applications imposes scalable and efficient network support. The DiffServ and MPLS architectures were developed to provide QoS. The combination of both architectures presents a very attractive strategy to backbone network providers. However, integrating native IP multicasting with MPLS supports DiffServ is a quite comple issue. Major problems are: the lack of labels in MPLS networks, the core routers simplicity in DiffServ and the multicast state scalability problems, since it requires routers to keep a forwarding state for every multicast tree passing through it. In addition, the number of states grows with the number of groups. Under such circumstance, we propose an hybrid label aggregation algorithm in order to solve multicast scalability problem and provide a solution for multicast in MPLS support DiffServ. In the proposed scheme, one label is assigned per multicast groups (logical aggregation) and different multicast groups sharing the same output interface in a router are aggregated locally (physical aggregation). Also, in order to support the proposed algorithm, we propose a separate treatment and labels space (prime numbers range) for multicast traffic. The proposed solution allows consuming fewer labels, reducing the forwarding table and consequently the total packet processing delay.     

基于RSVP-TE的组播信令协议的实现机制及性能研究

对自动交换光网络（AsON）中基于RSVP—TE的组播扩展进行了研究。提出了在现有信令架构上实现组播功能的几个关键问题,并就基本技术进行了讨论。在此基础上,介绍了4个RSVP—TE协议扩展模型,并通过仿真详细比较了它们的开销和性能。文中的理论分析和仿真结果对光网络中组播协议的设计和选择提供了重要的参考依据。     

Experiments and enhancements for IP and ATM integration: the IthACIproject

IthACI has been a European project in the ACTS framework concentrating on fast layer 2 forwarding methods for IP traffic based on labeled flow mechanisms. The approach is also known as IP switching and is considered promising for enhancing IP performance. Several flavors of IP switching have been proposed by various vendors (e.g., IP switching by Ipsilon, Tag Switching by Cisco, ARIS by IBM, IPSOFACTO by the NEC), all of them different and not interoperable. IP switching has been adopted by the IETF under the umbrella of multiprotocol label switching (MPLS). Although MPLS has made remarkable progress, a number of issues remain largely open for further investigation. The scope of the IthACI project was to address such issues and propose solutions. The issues addressed were multicast, QoS, resource management, and mobility support in a multicast environment. IthACI conducted both theoretical and experimental work. Three network islands, each based on a different flavor of IP switching, were set-up and the interoperability of these different IP switching/MPLS flavors were investigated and demonstrated     

一种基于组播技术的通信软件的设计与实现

IP组播技术实现了IP网络中点到多点的高效数据传送.因为组播能够有效地节约网络带宽、降低网络负载,所以在实时数据传送、多媒体会议、数据拷贝、游戏和仿真等诸多方面都有广泛的应用.文章简要介绍了组播的基本概念,并阐述了一种基于组播技术的支持多平台的通信软件解决方案.     

基于LKH混合树的组播密钥更新方案

IP组播通信越来越得到广泛的应用，其密钥动态管理是一个值得关注的问题。本文主要对组播密钥更新方案进行分析，并对基于LKH密钥树的更新方案进行了改进。     

MPLS组播流量工程综述

介绍了MPLS网络、组播技术和流量工程技术的特点与特征,结合它们之间的优势和对单播与组播流量工程的比较,重点综述了目前在MPLS网络上实施组播流量工程的几种建树方法、发展现状和存在的问题,最后对MPLS组播流量工程的研究作出了展望.     

Efficient Resource Allocation for Wireless Multicast

In this paper, we propose a bandwidth-efficient multicast mechanism for heterogeneous wireless networks. We reduce the bandwidth cost of an Internet protocol (IP) multicast tree by adaptively selecting the cell and the wireless technology for each mobile host to join the multicast group. Our mechanism enables more mobile hosts to cluster together and leads to the use of fewer cells to save the scarce wireless bandwidth. Besides, the paths in the multicast tree connecting to the selected cells share more common links to save the wireline bandwidth. Our mechanism supports the dynamic group membership and offers mobility of group members. Moreover, our mechanism requires no modification to the current IP multicast routing protocols. We formulate the selection of the cell and the wireless technology for each mobile host in the heterogeneous wireless networks as an optimization problem. We use integer linear programming to model the problem and show that the problem is NP-hard. To solve the problem, we propose a distributed algorithm based on Lagrangean relaxation and a network protocol based on the algorithm. The simulation results show that our mechanism can effectively save the wireless and wireline bandwidth as compared to the traditional IP multicast.