一种ICN流量区分的AQM算法  

An AQM Algorithm Based on Traffic Differentiation in ICN

作　　者：王志远 韩锐[1,2] 倪宏 WANG Zhiyuan;HAN Rui;NI Hong(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》2023年第5期11-18,共8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)是一种满足海量内容的数据分发需求的新型网络架构。在ICN中,用户向网络发送请求报文,网络中的缓存副本节点则会响应请求回复数据报文。请求报文与数据报文的流量是ICN中2种截然不同的流量类型。在网络发生拥塞时,为保证传输效率,需要区分处理不同特点的流量。针对ICN网络的延迟保障与带宽利用率问题,提出了一种区分报文类型的主动队列管理AQM算法。该算法通过对2种流量执行主动丢包操作,使2种流量趋于一个合理的状态。基于对2种流量被主动丢包的概率根据统计的2种报文流量占用带宽的大小结合比例积分控制器计算得出。同时,通过报文调度器优先调度对请求报文减少数据传输的往返时间。实验表明,提出的AQM算法能够合理分配2种报文占用的带宽,提高网络严重拥塞时数据传输的吞吐量,减少完成时间,降低往返时间。Information-Centric Networking(ICN)is a novel network architecture that can meet the demand for massive content data distribution.In ICN,users send request packets to the network,and cache replica nodes in the network respond with data packets.The traffic of request packets and data packets is two distinct types of traffic in ICN.In order to ensure transmission efficiency during network congestion,it is necessary to differentiate and handle these two types of traffic.To address the latency guarantee and bandwidth utilization issues in ICN,an Active Queue Management(AQM)algorithm is proposed that distinguishes between packet types.By actively dropping packets from both types of traffic,the algorithm ensures that both types of traffic tend towards a reasonable state.The probability of dropping packets from both types of traffic is calculated using a proportional-integral controller based on the statistical analysis of the bandwidth occupied by the two types of traffic.In addition,packet schedulers prioritize request packets to reduce round-trip time for data transmission.Experimental results show that the proposed algorithm can reasonably allocate the bandwidth occupied by both types of packets,increase the throughput of data transmission during severe network congestion,reduce completion time,and decrease the round-trip time.

关 键 词：信息中心网络 主动队列管理 路由器 流量控制 拥塞控制 

分 类 号：TP393.0[自动化与计算机技术—计算机应用技术]