中文摘要：

针对在稀疏分光配置的光突发交换（OBS）网络中进行多播的问题,提出了一种基于优先级的共享多播机制。该机制对包含相同分光节点的业务进行汇聚,并且在资源预约过程中引入了优先级来区分主干链路和分支链路,保证多播树的主干链路能优先抢占资源。通过仿真发现,相比传统多播机制,该方式能减少多播业务的丢包率和冗余包的数量,提高资源利用率。

英文摘要：

This paper investigated the problem of multicast in optical burst switching（OBS） network with sparse splitting capability. It proposed a novel scheme, which named preemptive priority based tree share scheme （PPTSS）. The algorithm assembled sessions with same splitting nodes as a burst, and then used preemptive priority to reserve wavelength resources for the burst. Compared with traditional muhicast scheme, the proposed scheme could further decrease the blocking probability and improve the bandwidth resource utilization ratio.