中文摘要：

为了提高移动IPv6网络中组播的服务质量，提出一种动态的基于快速切换的层次型移动组播协议——DFHMM。协议设置两级组播代理，对外屏蔽节点的域内切换；利用移动锚点担当区域组播移动代理，提供配置的高灵活性和通信的强鲁棒性；使用基于链路层触发的快速切换机制，缩短组播服务的中断时间。给出了协议的体系结构、切换流程、数据结构和操作细节。

英文摘要：

To improve the quality of service of muhicast in mobile IPv6 networks, this paper proposed a dynamic fast handover based hierarchical mobile multicast protocol： DFHMM. DFHMM deployed two levels of multicast agent to conceal handover within a domain, and used the mobility anchor point as domain muhicast agent to provide deploy flexibility and communication robustness. It adopted layer-2 trigger based fast handover mechanism to reduce the halting time of muhicast service . Then presented architecture, handover procedures, data structure and operation details of DFHMM.