Design and Optimization of VLC Enabled Data Center Network

作     者：Yudong Qin Deke Guo Xu Lin Geyao Cheng Yudong Qin;Deke Guo;Xu Lin;Geyao Cheng

作者机构：Science and Technology on Information Systems Engineering LaboratoryNational University of Defense TechnologyChangsha 410073China School of Computer Science and TechnologyXidian UniversityXi’an 710000China 

出 版 物：《Tsinghua Science and Technology》 (清华大学学报（自然科学版（英文版）)

年 卷 期：2020年第25卷第1期

页      面：81-92页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

主　　题：Data Center Network(DCN) Visible Light Communication(VLC) topology design 

摘      要：Visible-Light Communication(VLC) has the potential to provide dense and fast connectivity at low cost. In this paper we propose SFNet, a novel VLC-enabled hybrid data center network that extends the design of wireless Data Center Networks(DCNs) into three further dimensions:(1) fully wireless at the inter-rack level;(2) no need for a centralized control mechanism on wireless links;and(3) no need for any infrastructure-level alterations to data centers. Previous proposals typically cannot realize these three rationales simultaneously. To achieve this vision,the proposed SFNet augments fat-tree by organizing all racks into a wireless small-world network via VLC links. The use of VLC links eliminates hierarchical switches and cables in the wireless network, and thus reduces hardware investment and maintenance costs. To fully exploit the benefits of the topology of SFNet, we further propose its topology design and optimization method, routing scheme, and online flow scheduling algorithm. Comprehensive experiments indicate that SFNet exhibits good topological properties and network performance.