| RPT到SPT组播切换丢包问题研究 |
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| 引用本文： | 李鑫,韩国栋,刘洪波.RPT到SPT组播切换丢包问题研究[J].计算机工程,2007,33(7):107-108. |
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| 作者姓名： | 李鑫 韩国栋 刘洪波 |
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| 作者单位： | 信息工程大学国家数字交换系统工程技术研究中心,郑州,450002 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 协议无关组播-稀疏模式是目前应用最广泛的组播路由协议之一。它以汇聚点为基础建立共享树进行数据传输，由接收者发起到源的最短路径树的建立，通过最短路径树进行组播数据的分发。在共享树向最短路径树切换时会发生部分数据包丢失现象。该文分析了RPT向SPT切换时数据包丢失的原因及相关因素，提出了改进和解决方案。
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| 关 键 词： | 组播 协议无关组播-稀疏模式 共享树 最短路径树 |
| 文章编号： | 1000-3428（2007）07-0107-02 |
| 修稿时间： | 2006-11-10 |
Research on Packet Loss During RPT to SPT Switch |
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| LI Xin,HAN Guodong,LIU Hongbo.Research on Packet Loss During RPT to SPT Switch[J].Computer Engineering,2007,33(7):107-108. |
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| Authors: | LI Xin HAN Guodong LIU Hongbo |
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| Affiliation: | NDSC, PLA Information Engineering University, Zhengzhou 450002 |
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| Abstract: | Protocol-independent multicast sparse mode(PIM-SM) is one of the most widely used multicast routing protocols.According to its mechanism,multicast applications establish shared tree that based on the RP to transport data.Then,the receivers start to establish the shortest path tree to the source and at last transport multicast data through it.In the course of the switch from shared tree to the shortest path tree,packet loss often happens during the switch from shared tree to the shortest path tree.The paper gives a particular analysis of the reasons and other factors for packet loss.It also provides the resolving and the results of pertinent assaying. |
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| Keywords: | Multicast Protocol independent multicast-sparse mode Rendezvous point tree Shortest path tree |
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