TCP congestion control for wireless datacenters

TCP is a low cost and easy-to-use transport layer pro-tocol widely used in datacenter based applications and web services. Many TCP congestion control algorithms have been proposed to im-prove the performance of TCP in datacenter networks. However, the emerging wireless technologies in datacenter networks create new prob-lems for TCP congestion control. On the one hand, TCP algorithms must suit the special application patterns (such as incast and Partition/ Aggregate) of the datacenters. On the other hand, TCP must perform well within the random packet losses caused by unreliable wireless links. Although there are many datacenter/wireless oriented TCP algorithms for either datacenter or wireless networks, designing a TCP algorithm that can meet both "datacenter" and "wireless" requirements of wire-less datacenters still remains a great challenge. In this paper, a novel congestion control algorithm is proposed to improve the performance of TCP over wireless datacenter environments. The proposed approach combines an ACK-based wireless network bandwidth estimate with an ECN-based datacenter TCP congestion control that can perform well in both the datacenter environments and wireless links. The simulated experiments validate the performance of our proposed approach.