在MPLS网络构造多点广播树的新方法
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| 在 MPLS 网络构造多点广播树的新方法 摘要：在这篇论文中，我们提出一种在 MPLS 网络构造组播树的新方法。这种方法是在组播树分支路由器之间利用 MPLS LSPs以减少传递状态而且提高可量测性。在我们的方法中，只有作为组播树分支结点的为本小组服务的路由器需要为本小组保持传递状态。所有的其他非分支的节路由器只简单的使用MPLS LSPs 在流量控制的单播线路上传播数据包。我们能推论我们的方法可以被大量的应用，因为它为多播流量相同的单播MPLS传播方案。在这篇论文中，我们简短地讨论 MPLS，多点广播可量测性问题,合并二种技术，减少传递状态相关的工作和不同的技术。 我们评估这个方法而且提出一些相关的论点去最后证实它是能实行和有前途的。(毕业设计 ) 一些发展的应用比如万维网，视频/声音服务，而且电传会议消费很多的网络带宽。多播是一种支持这些应用的有用的手段。使用多点广播, 数据可以通过分享连接带宽从一个来源被送到多个目的地。但是多点广播遭受可量测性问题。的确，一个多点广播路由器应该继续为经过它的每个多点广播树保持转发状态。转发状态的数量随着组数的增长而增长。此外， MPLS已经当做优秀的解决满足带宽管理和服务下代IP为基础的主干网络的方案。我们认为多点广播和MPLS是二种补充的技术，而且在MPLS网络构造多播树合并多点这二种技术将会提高性能，并为多点广播可量测性和一般控制问题提高表现提出一种有效率的解决方案。 在这一个部分中，我们将会简短地提出MPLS, 多点广播然后是多点广播可量测性问题。 Trees in MPLS Networks Abstract： In this paper1, we present a new approach to construct multi-cast trees in MPLS networks. This approach utilizes MPLS LSPS betweenmulticast tree branching node routers in order to reduce forwarding s-tates and enhance scalability. In our approach only routers that are act-ing as multicast tree branching node for a group need to keep forwardingstate for that group. All other non-branching node routers simply for-ward data packets over trac ngineered unicast routes using MPLSLSPS. We can deduce that our approach can be largely deployed becauseit uses for multicast tra_c the same unicast MPLS forwarding scheme.In this paper, we briefly discuss MPLS, the multicast scalability problem,merging the two technologies, related works and di_erent techniques forforwarding state reduction. We evaluate the approach and present somerelated issues to conclude nally that it is feasible and promising. Several evolving applications like WWW, video/audio on-demand services, andteleconferencing consume a large amount of network bandwidth. Multicastingis a useful operation for supporting such applications. Using the multicast ser-vices, data can be sent from a source to several destinations by sharing thelink bandwidth. But multicast su_ers from the scalability problem. Indeed, amulticast router should keep forwarding state for every multicast tree passingthrough it. The number of forwarding states grows with the number of groups.Besides, MPLS has emerged as an elegant solution to meet the bandwidth-management and service requirements for next generation Internet protocol based backbone networks.We think that multicast and MPLS are two complementary technologies and merging these two technologies where multicast trees are constructed in MPLS networks will enhance performance and present an e_cient solution for multicast scalability and control overhead problems.In this section, we will briefly presentMPLS, multicast and then the multicast scalability problem.1 This work has been supported by the franco-lebanese program CEDRE. 全文5300字 |