Abstract
The 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 DCN into three further dimensions: (1) fully wireless in the inter-rack level; (2) no need for centralized control mechanism on wireless links; (3) no need for any infrastructure-level alteration to data center. Previous proposals typically cannot realize the 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 using of VLC links eliminates hierarchical switches and cables in wireless network, and thus reduces hardware investment and maintenance cost. To fully exploit the benefits of the topology of SFNet, we further propose the topology design and optimization method, and routing scheme for SFNet. Comprehensive experiments indicate that SFNet exhibits good network performance.
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