针对分布式路由器，设计了组播转发表优化分布式存储及组播报文两级转发方案提高性能。
Aiming at distributed router, we design the optimized distributed storage of multicast forwarding table, and two level forwarding project for multicast datagram.
组播组的聚合使得网络中组播树的数量减少，路由器需要维持的组播转发状态和传递控制信息带来的控制开销都大大降低。
With multicast tree aggregation, fewer trees are maintained which amounts to reduce both the number of forwarding states in routers and the overhead induced by control messages.
跟上我了？最后一个条目是出接口，因此当我们接收一些这个组播组的流量是，我们将通过这个接口转发它。
Still with me? The final entry is the outgoing interface list, so when we DO receive some traffic for this multicast group, this shows where we will forward it.
IP组播利用树转发结构，只需在组播树的分支处复制数据报文，而且在每条链路上仅转发一次。
IP multicast utilizes a tree delivery structure, on which data packets are duplicated only at fork nodes and are forwarded only once over each link.
算法采用按需路由发现过程，动态更新路由信息和建立多播转发组。
The algorithm applies on-demand procedures to dynamically refresh routes and build multicast forwarding group.
MPLS与组播优势互补，MPLS组播网络能对数据进行高速有效的转发。
The advantages of MPLS and multicast is complementary, MPLS multicast network can forward the traffic fast and efficiently.
通过构建加速路由表，加快发现服务的速度，降低消息转发的延时，并通过幂次序组播算法改善对超级点的依赖性。
It will speed up the lookup process and reduce the service delay with the expressed routing table and power sorting multicast algorithm.
采用组头轮换机制，使能量储备较多和位置最优的节点担任组播节点承担转发任务，能量储备较少的节点负责数据采集任务。
The use of group head rotation mechanism, node with more energy reserves and the optimal location forward packets to other nodes, node with less energy reserves is responsible for data acquisition.
针对这一问题，本文设计了一个组播流的二层转发管理方案。
In response to this problem, this paper designs a layer2 forwarding method to handle the multicast traffic.
当大量组播组并存于网络时，数量庞大的转发状态表占用了大量内存资源并且减缓了组播地址查询过程。
When there are large Numbers of multicast groups in the network, large forwarding tables induce large memory requirements and slow down the address look-up process.
由ucla网络实验室提出的聚合组播使域内的多个组播组共用同一棵聚合树来转发组播数据包。
Aggregated Multicast is a recent approach proposed by the UCLA network laboratory. In this approach, multiple groups share the same aggregated tree within a domain.
在传统组播中，组播组数据由一棵覆盖所有组成员的组播树进行转发，树上路由器必须保存每一个组播组的转发状态。
In traditional IP multicast, data for a given group is forwarded through a tree structure covering the members of this group. The on-tree routers must maintain a per-group forwarding state.
根据转发状态的变化情况，构建出组播数据的二层转发表。
And a forwarding table for multicast traffic should be built according to the changes of the forwarding state.
应用本发明提供的方法和装置使组播树切换时转发路径最优。
The multicast tree switching method and the device realize optimum forwarding path for multicast tree switching.
应用本发明提供的方法和装置使组播树切换时转发路径最优。
The multicast tree switching method and the device realize optimum forwarding path for multicast tree switching.
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