DMA在远程加入的基础上，使用动态选择组播代理和局部隧道的方法，为移动网络内的节点提供组播服务。
Based on Remote Subscription, DMA services the nodes inside the mobile network by using dynamic multicast agent selection and local tunnel.
通过这种集中于故障链路或节点的局部恢复，组播树的快速恢复得以实现。
The fast restoration of optical multicast trees is realized through this part restoration, which focuses on failed node or link.
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