page_title: Wireless data center
section_title: Architecture
hierarchical_section_title: Wireless data center / Proposed designs / Cayley DCN / Architecture
caption_attribution_description: English: Cayley wireless Data Center
context_page_description: A Wireless Data center is a type of data center that uses wireless communication technology instead of cables to store, process and retrieve data for enterprises. The development of Wireless Data centers arose as a solution to growing cabling complexity and hotspots. The wireless technology was introduced by Shin et al., who replaced all cables with 60 GHz wireless connections at the Cayley data center.
context_section_description: In the concept of wireless data centers, efficient use of open spaces is significant in order to optimize resource multiplexing. Since the maximum number of live connections proportional to the volume of data center per single antenna beam. Cayley DCN proposes to use cylindrical racks that are contains levels called stories and each row contains pie-shaped containers. (Fig. 1). These containers stores servers in it and servers faces both inner rack space and inter-rack space. Each server has two transceivers positioned at opposite ends of it. One for intra-rack communication and another one for inter-rack communication. Network Interface Cards (NIC) that are used in traditional data centers are replaced by a custom-built Y-switch with transceivers to connect the server's system bus. In this way, classic network switching fabric that exists in traditional databases are eliminated, which means, there is no need classic networking switches in the novel topology since every server is able to route data. This communication is maintained by geographical routing protocol which tries to find the shortest path between source and destination using coordinates of racks, the ordinal number of stories and the index number of the server in the stories. A server uses three routing tables to determine next hop which are inter-rack routing table, inter-story routing table, intra-story routing table.
caption: Fig. 1: Cayley wireless Data Center[1]
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