Passive optical star networks have attractive properties for multicast traffic in data centres, but are limited in transmission bandwidth per node due to sharing a finite total throughput capacity. By adding reconfigurable switching elements to the core of an optical star topology, simulations show that the expected transmission rate per node can be increased by 26–40% (at 90% and 70% network load respectively). The proposed architecture shows no loss of multicast functionality compared to a single passive optical star, and only 7.1% increase in power consumption. Network throughput is shown to be highly dependent on the network traffic pattern, with simulations of multicast zonal media production traffic showing 6 times greater throughput than random or hotspot traffic models.

无源光纤星形网络对于数据中心中的多播流量具有吸引人的属性，但是由于共享有限的总吞吐量，因此每个节点的传输带宽受到限制。通过将可重新配置的交换元件添加到光学星形拓扑的核心，仿真显示，每个节点的预期传输速率可以提高26–40％（分别在90％和70％的网络负载下）。与单个无源光星相比，所提出的体系结构没有显示多播功能的损失，功耗仅增加了7.1％。网络吞吐量显示出高度依赖于网络流量模式，对多播区域媒体生产流量的仿真显示，其吞吐量是随机或热点流量模型的6倍。