基于链路容量的多路径拥塞控制算法  

Multipath congestion control algorithm based on link capacity

作　　者：王竹[1,2] 袁青云 郝凡凡 房梁 李凤华 WANG Zhu;YUAN Qingyun;HAO Fanfan;FANG Liang;LI Fenghua(Institute of Information Engineering,Chinese Academy of Sciences,Beijing 100093,China;School of Cyber Security,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院信息工程研究所,北京100093 [2]中国科学院大学网络空间安全学院,北京100049

出　　处：《通信学报》2020年第5期59-71,共13页Journal on Communications

基　　金：国家重点研发计划基金资助项目(No.2018YFB0803903);国家自然科学基金资助项目(No.U1836203,No.61672515);山东省重点研发计划基金资助项目(No.2019JZZY020127);中国科学院战略性先导科技专项基金资助项目(No.XDC02040400)。

摘　　要：多路径传输的链路差异性和TCP友好性约束等因素导致将现有的TCP拥塞控制机制直接用于多路径传输时,会带来带宽分配不公平的问题。针对此问题,提出了一种基于链路容量的多路径拥塞控制算法。所提算法基于反馈调节拥塞的思想,利用M/M/1缓存队列模型调控接收端缓存队列大小,对发送端吞吐量进行调节,实现多路径联合拥塞控制。实验结果证明,所提算法可提升多路径传输带宽利用率、多路径拥塞控制算法响应能力,保证多路径传输公平性。Factors such as link differences and TCP friendliness constraints lead to the problem of unfair bandwidth allocation when the TCP congestion control mechanism was applied directly to multi-path transmission.To address the problem,it was proposed that a multipath congestion control algorithm was based on link capacity.The proposed algorithm which was based on the concept of feedback regulation achieved multipath joint congestion control by establishing the M/M/1 cache queue model to adjust the throughput rate of senders.Experimental results show the proposed algorithm can improve the multipath transmission bandwidth utilization and the multipath congestion control algorithm responsiveness,and ensure the fairness of multipath transmission.

关 键 词：多路径TCP 拥塞控制 公平性 带宽利用率 反馈调节 

分 类 号：TN929[电子电信—通信与信息系统]