中文摘要：

讨论了自动交换光网络中实现组播的意义，介绍了GMPLS框架下基于RSVP-TE信令协议做出的组播扩展。在实验网络环境里完成了组播信令协议的实现并成功进行了组播树的建立、嫁接、剪枝和删除等操作。

英文摘要：

This paper discusses the motivation to implementing multicast in automatic switched optical network and investigates the extensions to RSVP-TE for dynamic point-to-multipoint trees under GMPLS framework. Setup, grafting, pruning and teardown operations of trees were successfully achieved by an implementation of extended GMPLS protocols in an experimental network.