Concurrency in polygonally arranged wireless Data Centers with all line-of-sight links

The use of wireless links can provide flexibility and reconfigurability to data center networks. Recent investigations show that 60GHz millimeter-wave technology can be used in wireless data center networks. The steerable millimeter-wave transceiver works as a multi-port switch where point-to-point links are established using beam-forming. Considering an interference model, specific to the wireless data center, we propose a new algorithm for k-pod fat-tree data center topology mapping. Further, we propose to group all links of the network into sets of mutually concurrent links. By assigning a time slot for all concurrent links in a set, we devise a TDMA scheduling algorithm for the wireless network. We show that the concurrent wireless transmissions could result in O(k²) number of slots that is k times better than graph based coloring approach. By increasing the concurrency, we argue that the use of 60GHz technology is more viable in building completely wireless data centers.