Data centers (DCs) became an important part of computing today. A lot of services in Internet are run on DCs. Meanwhile a lot of research is done to tackle the challenges of high-performance and energy-efficient data center networking (DCN). Hot node congestion, cabling complexity/cost, and cooling cost are some of the important issues about data centers that need further investigation. Static and rigid topology in wired DCNs is an other issue that hinders flexibility. Use of wireless links for DCNs to eliminate these disadvantages is proposed and is an important research topic. In this paper, we review research studies in literature about the design of radio frequency (RF) based wireless data center networks. RF wireless DCNs can be grouped into two as hybrid (wireless and wired) and completely wireless data centers. We investigate both. We also compare wireless DCN solutions in the literature with respect to various aspects. Open areas and research ideas are also discussed.

数据中心（DC）成为当今计算的重要组成部分。Internet上的许多服务都在DC上运行。同时，为了应对高性能和高能效的数据中心网络（DCN）的挑战，进行了大量研究。热节点拥塞，布线复杂性/成本和冷却成本是有关数据中心的一些重要问题，需要进一步调查。有线DCN中的静态和刚性拓扑是另一个妨碍灵活性的问题。提出了将无线链路用于DCN来消除这些缺点的建议，这是一个重要的研究课题。在本文中，我们回顾了有关基于射频（RF）的无线数据中心网络设计的文献研究。射频无线DCN可以分为混合（无线和有线）和完全无线数据中心两个部分。我们对两者进行调查。我们还从各个方面比较了文献中的无线DCN解决方案。还讨论了开放领域和研究思路。