基于多上游接口MLD代理的移动组播

摘要

RFC6224 is the base deployment for supporting multicast listener in Proxy Mobile IPv6 domains, but this deployment may lead to tunnel convergence problem with redundant traffic at the MAGs. In order to solve this problem, a multi-upstream MLD (multicast listener discovery) proxy-based solution is proposed in this paper, which essentially resolves the tunnel convergence problem by modifying the traditional MLD proxy through changing the sole upstream into multi-upstream and recording the multicast membership state information from all downstream interfaces. Compared with the other three solutions in MULTIMOB working group, the proposed method in this paper has more advantages.%RFC6224是在PMIPv6域中支持组播接收者移动的部署方案.此方案中移动接入网关(MAG)上部署的多实体组播侦听发现(MLD)代理会造成冗余的组播数据到达MAG,产生“隧道汇聚”问题.为此,提出一种基于多上游接口MLD代理的解决方法.该方法对传统的MLD代理进行改进,把单一的上游接口改造成多上游接口,并使用“显式追踪”功能记录下游接口的组成员状态信息,从根本上解决“隧道汇聚”问题.对比分析结果显示,提出的移动组播方案与MULTIMOB工作组中的组播树移动锚点移动组播、直接路由移动组播和PMlPv6扩展移动组播方案相比更具优势.