Resilient TCP Variant Enabling Smooth Network Updates for Software-Defined Data Center Networks  

作　　者：Abdul Basit Dogar Sami Ullah Yiran Zhang Hisham Alasmary Muhammad Waqas Sheng Chen 

机构地区：[1]Department of Computer Science and Technology,Tsinghua University,Beijing 100084,China and also with Department of Informatics and Systems,University of Management and Technology,Lahore 54660,Pakistan [2]Department of Computer Science,Shaheed Benazir Bhutto University,Sheringal,Upper Dir 18050,Pakistan [3]School of Computer Science,Beijing University of Posts and Telecommunications,Beijing 100876,China [4]Department of Computer Science,College of Computer Science,King Khalid University,Abha 61421,Saudi Arabia [5]Department of Computer Engineering,Faculty of Information Technology,University of Bahrain,Sakheer 32038,Bahrain,and also with School of Engineering,Edith Cowan University,Perth WA 6027,Australia [6]School of Electronics and Computer Science,University of Southampton,Southampton,SO171BJ,UK

出　　处：《Tsinghua Science and Technology》2024年第5期1615-1632,共18页清华大学学报自然科学版（英文版）

基　　金：supportted by the King Khalid University through the Large Group Project(No.RGP.2/312/44).

摘　　要：Network updates have become increasingly prevalent since the broad adoption of software-defined networks(SDNs)in data centers.Modern TCP designs,including cutting-edge TCP variants DCTCP,CUBIC,and BBR,however,are not resilient to network updates that provoke flow rerouting.In this paper,we first demonstrate that popular TCP implementations perform inadequately in the presence of frequent and inconsistent network updates,because inconsistent and frequent network updates result in out-of-order packets and packet drops induced via transitory congestion and lead to serious performance deterioration.We look into the causes and propose a network update-friendly TCP(NUFTCP),which is an extension of the DCTCP variant,as a solution.Simulations are used to assess the proposed NUFTCP.Our findings reveal that NUFTCP can more effectively manage the problems of out-of-order packets and packet drops triggered in network updates,and it outperforms DCTCP considerably.

关 键 词：software defined data center networks network updates DCTCP out-of-order packets packet drop SDN 

分 类 号：TN929.1[电子电信—通信与信息系统] TP308[电子电信—信息与通信工程]