基于往返时延梯度的多路径拥塞控制算法  

Multipath congestion control algorithm based on round trip delay gradient

作　　者：程前 王福平 CHENG Qian;WANG Fu-ping(School of Computer Science and Engineering,North Minzu University,Yinchuan 750000,China)

机构地区：[1]北方民族大学计算机科学与工程学院,宁夏银川750000

出　　处：《计算机工程与设计》2023年第4期1027-1034,共8页Computer Engineering and Design

基　　金：国家自然科学基金项目(62062001);北方民族大学重大专项基金项目(ZDZX201901);宁夏自然科学基金项目(2020AAC03214)。

摘　　要：为更好利用有限的网络带宽资源,提高带宽利用率,提出一种利用往返时延梯度精确感知带宽变化的多路径拥塞控制算法。根据往返时延的大小反馈网络拥塞程度,将拥塞程度量化为时延梯度作为拥塞窗口的控制参数;为保证链路公平,利用往返时延估计链路带宽,经迭代分配带宽,给出公平的资源分配方法。在NS-3上进行仿真,其结果表明,多路径流的吞吐量较单路径流明显提高,保证了链路分配的公平,动态环境下的响应时间较同类算法有所减小。该算法进一步提高了网络带宽的利用率。To effectively use network bandwidth resources and improve bandwidth utilization,a multipath congestion control algorithm based on round-trip delay gradient was proposed.The degree of network congestion was fed back by round-trip delay and the degree of congestion was quantified as delay gradient as the control parameter of congestion window.To ensure link fairness,the round-trip delay was used to estimate link bandwidth,and the fair resource allocation method was detected through iterative bandwidth allocation.Simulation results on NS-3 show that the throughput of multi-path flow is significantly improved compared with that of single-path flow,ensuring the fairness of link distribution,and the response time in dynamic environment is reduced compared with similar algorithms.This algorithm further improves the utilization rate of network bandwidth.

关 键 词：多路径传输 拥塞控制 窗口模型 往返时延 链路公平 公平因子 拥塞因子 

分 类 号：TP393.01[自动化与计算机技术—计算机应用技术]