从小到大：Clos网络扩展全光交换
From Small to Large: Clos Network for Scaling All-Optical Switching
摘要：
为了满足快速增长的互联网流量的需求，骨干网络需要高度可重构的光分插复用器（ROADM），以同时支持每个链路上的多对双向光纤。然而，传统的基于Spanke网络的ROADM架构过于复杂，无法直接扩展以构建高度的ROADM。此外，广泛部署的基于电气交换机的脊叶数据中心网络（DCN）消耗太多功率并且表现出高分组延迟。由于这些问题，Clos网络被认为是构建大规模ROADM和全光DCN的有前途的替代方案。在本文中，我们将研究下一代基于Clos的ROADM架构，并表明与传统的基于Spanke的ROADM架构相比，它确实提供了更好的阻塞性能，并且元件和光纤复杂性更低。我们还讨论了Clos网络在全光DCN中的应用，表明它可以用于有效地构建大规模DCN，在支持各种组播服务和结合不同的网络拓扑结构方面具有更大的灵活性。
英文摘要：
To cater to the demands of our rapidly growing Internet traffic, backbone networks need high-degree reconfigurable optical add/drop multiplexers (ROADMs) to simultaneously support multiple pairs of bi-directional fibers on each link. However, the traditional ROADM architecture based on the Spanke network is too complex to be directly scaled up to construct high-degree ROADMs. In addition, the widely deployed Spine-Leaf datacenter networks (DCNs) based on electrical switches consume too much power and exhibit high packet latency. Because of these issues, Clos networks are considered as promising alternatives for constructing large-scale ROADMs and all-optical DCNs. In this article, we look at a next-generation Clos-based ROADM architecture and show that it indeed provides better blocking performance with lower element and fiber complexities compared with a traditional Spanke-based ROADM architecture. We also discuss the application of a Clos network in all-optical DCNs to show that it can be used to effectively construct large-scale DCNs with significantly greater flexibility in supporting a variety of multicast services and in combining different network topologies.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
