| 一种优化的PIM-SM组播转发算法的设计 |
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| 引用本文： | 李贺武,李风华,李钟辉,吴建平.一种优化的PIM-SM组播转发算法的设计[J].计算机工程与应用,2002,38(13):143-146,149. |
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| 作者姓名： | 李贺武 李风华 李钟辉 吴建平 |
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| 作者单位： | 清华大学信息网络工程研究中心,北京,100084 |
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| 摘 要： | 简要叙述了PIM-SM中两种组播转发树特点及其相关研究,给出了一种PIM-SM组播转发树从SPT变迁到ST的设计,这一变迁是PIM-SM组播转发算法的扩展。通过这一扩展使得PIM-SM组播转发可以动态地在ST和SPT组播转发树之间进行切换,从而可以综合利用两种组播转发树的优势,来适应动态变化的网络,使得PIM-SM组播转发算法能够在扩展性和性能之间达到较好的平衡和优化。通过在实验室组播试验平台上的实际测试,证明这种协议扩展的设计能够较好地满足设计的要求。
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| 关 键 词： | 组播 PIM-SM 转发树变迁 ST(Shared Tree) SPT(Shortest Path Tree) |
| 文章编号： | 1002-8331-(2002)13-0143-04 |
One Design of Optimizing PIM-SM Multicast Arithmetic |
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| Li Hewu Li Fenghua Li Zhonghui Wu Jianping.One Design of Optimizing PIM-SM Multicast Arithmetic[J].Computer Engineering and Applications,2002,38(13):143-146,149. |
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| Authors: | Li Hewu Li Fenghua Li Zhonghui Wu Jianping |
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| Abstract: | This paper intro du ces a distribution tree transition mechanism for PIM-SM,which allows multicas t data delivery tree switching from SPT to ST.In fact,the mechanism is an exte nsion of the classical PIM-SM.The extension allows PIM to dynamically switch between ST and SPT,which enables PIM to better adapt to the changing of networ k environment.You can use this mechanism to resolve the conflict between scalab ility and performance of multicast routing protocols.Our simulation results re veal that the mechanism performs well as expected. |
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| Keywords: | Multicast PIM-S M tree switching Shared Tree(ST) Shortest Path Tree(SPT) |
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