无线数据中心网络：进展、挑战和展望

随着动态数据流量的迅速增长，庞杂的有线数据中心网络架构给网络扩张、能耗管理和运营维护等方面均带来了巨大的挑战。高速无线技术具有高带宽、动态连接且灵活可控的特征优势，成为一种潜在的数据中心组网解决方案，可以缓解数据中心长期存在的流量拥塞热点问题，减少部署和维护光缆所花费的时间、精力和成本。首先介绍了当前数据中心网络架构的发展趋势，分析比较了毫米波、太赫兹和自由空间光作为无线数据中心网络候选高速无线技术的优缺点。然后深入讨论了当前典型的无线数据中心网络架构，阐述了无线数据中心网络设计和部署面临的挑战，并对其未来发展方向进行了展望。

Wireless data center network:Advances,challenges and perspectives

With more and more dynamic traffic, the complex wired data center network architecture poses tremendous challenges to network expansion, energy consumption management, operation and maintenance. High-speed wireless technology has the advantages of high bandwidth, dynamic connection, and flexible controllability. It has become potential data center networking solution, which can alleviate the long-term issue of traffic hotspot in data centers and reduce the time, energy and cost it takes to deploy and maintain optical cables. This paper first introduces the current development trend of data center network architecture, and analyzes and compares the advantages and disadvantages of millimeter wave, terahertz and free space optical as potential candidate high-speed wireless technologies. Secondly, we review the current typical wireless data center network architectures with investigations on the challenges of wireless data center network design and deployment. Finally,we point out the future perspectives of wireless data center networks.