现就其中组播路由协议对网络性能的影响进行了研究。
The paper performs the study on the influence of multicast route protocol on network performance.
同时，大量控制开销用于维持大规模并存的组播树，这些都导致网络性能急剧下降。
Moreover, maintaining multicast trees requires an exchange of control messages causing an important overhead. Hence, the network performance will be tremendously degraded.
网络编码是改善组播通信性能的一种新技术。
Network coding is a new technique which can improve the performance of multicast communications.
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