SDTCP: Towards Datacenter TCP Congestion Control with SDN for IoT Applications

Sensors

Shuhong Zhu¹  Ling Tang¹  Yifei Lu¹  Zhen Ling² 

[1] School of Computer Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;School of Computer Science and Engineering, Southeast University, Nanjing 211189, China;

关键词: data center networks;    IoT;    incast;    congestion control;    SDN;   

DOI  :  10.3390/s17010109

来源: DOAJ

【 摘 要 】

The Internet of Things (IoT) has gained popularity in recent years. Today’s IoT applications are now increasingly deployed in cloud platforms to perform Big Data analytics. In cloud data center networks (DCN), TCP incast usually happens when multiple senders simultaneously communicate with a single receiver. However, when TCP incast happens, DCN may suffer from both throughput collapse for TCP burst flows and temporary starvation for TCP background flows. In this paper, we propose a software defined network (SDN)-based TCP congestion control mechanism, referred to as SDTCP, to leverage the features, e.g., centralized control methods and the global view of the network, in order to solve the TCP incast problems. When we detect network congestion on an OpenFlow switch, our controller can select the background flows and reduce their bandwidth by adjusting the advertised window of TCP ACK packets of the corresponding background flows so as to reserve more bandwidth for burst flows. SDTCP is transparent to the end systems and can accurately decelerate the rate of background flows by leveraging the global view of the network gained via SDN. The experiments demonstrate that our SDTCP can provide high tolerance for burst flows and achieve better flow completion time for short flows. Therefore, SDTCP is an effective and scalable solution for the TCP incast problem.

【 授权许可】

Unknown