接收者驱动的拥塞控制算法研究  

Research of Receiver-driven Congestion Control Algorithm

作　　者：徐晓明 潘梁[1,2] 朱小勇 宋雅琴[1,2] XU Xiaoming;PAN Liang;ZHU Xiaoyong;SONG Yaqin(National Network New Media Engineering Research Center,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院声学研究所国家网络新媒体工程技术研究中心,北京100190 [2]中国科学院大学,北京100049

出　　处：《网络新媒体技术》2022年第2期33-41,共9页Network New Media Technology

基　　金：中国科学院战略性科技先导专项课题:SEANET技术标准化研究与系统研制(编号:XDC02070100)。

摘　　要：信息中心网络(ICN)是一种以信息为中心的新型网络架构,采用接收者驱动的数据服务模式。接收者基于数据名称发送请求,网内可提供该数据的节点响应请求。现有ICN中拥塞控制机制多采用基于丢包的拥塞控制算法,保守的线性增加与激进的乘性减小窗口的方法使得带宽利用率较低。本文通过将BBR拥塞控制算法应用于接收者驱动的数据传输,与采用ICN网络架构的ICP相比,采用BBR算法的拥塞控制机制可以快速逼近网络带宽并保持,传输性能优于基于丢包的拥塞控制算法。另外针对接收者驱动网络下流量突发以及速率下降严重的问题对BBR算法进行改进,设计平滑请求机制,使用50%的拥塞窗口探测最小RTT。对比算法改进前后,改进后算法网络流量更加平滑,且探测RTT阶段不会大幅降低网络传输速率,带宽利用率优于原BBR算法。ICN is a new information-centric network architecture,and uses a receiver-driven data service model.The receiver sends a request based on the data name,and any node that can provide the data responds to the request.Most of the existing mechanisms in ICN use loss-based algorithms.The linear increase and the multiplicative reduction method make the bandwidth utilization low.In this paper,we have applied the BBR algorithm to receiver-driven data transmission.Compared with the ICP in ICN network architecture,the BBR algorithm could quickly approximate and maintain the network bandwidth,and the transmission performance was better than the loss-based algorithms.In addition,the BBR algorithm was improved to solve the problem of traffic bursts and rate drops.We have designed a smoothing mechanism and used half of congestion window to probe the minimum RTT.Compare the original BBR algorithm,the traffic of the improved algorithm was smoother,and the transmission rate was not greatly reduced during the Probe-RTT phase,and the bandwidth utilization was higher.

关 键 词：信息中心网络 接收者驱动 拥塞控制算法 BBR 算法 

分 类 号：TP393.02[自动化与计算机技术—计算机应用技术]