命名数据网络中一种显式拥塞控制方法研究  

An explicit congestion control method in Named Data Network

作　　者：邢光林[1] 胡青 侯睿[1] XING Guanglin;HU Qing;HOU Rui(College of Computer Science,South-Central Minzu University,Wuhan 430074,China)

机构地区：[1]中南民族大学计算机科学学院,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2022年第2期228-234,共7页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家自然科学基金资助项目(61972424);中南民族大学研究生学术创新基金项目(3212021sycxjj146)。

摘　　要：针对命名数据网络中的数据拥塞控制问题,提出了一种基于即时调整兴趣包发送速率的显式拥塞控制方法.当网络发生拥塞时,通过计数器和整形队列对贪婪流的速率进行限制,并更新兴趣包中的拥塞信息域将其逐跳反馈给下游路由节点;通过数据包将拥塞信息反馈给内容请求者,内容请求者据此调整兴趣包发送速率.同时引入延时差值来对不同数据流进行优先级的划分,保证了不同数据流的服务质量.基于ndnSIM 2.0的实验结果表明:该方法能在有效提高瓶颈链路利用率的同时实现较低的丢包率.Aiming at the problem of data congestion control in Named Data Network,an explicit congestion control method is proposed which adjusts the sending rate of interest packets immediately.When congestion occurs,the speed of the overspeed flow is limited through counter and shaping queue,the congestion information domain in the interest packet is updated and it is fed back to the downstream routing nodes hop-by-hop.The congestion information is fed back to the subscriber through the data packet,and then the subscriber adjusts the sending rate of interest packet accordingly.At the same time,the delay difference to divide the priority of different flows is introduced,so as to ensure the QoS of different flows.Simulation results based on ndnSIM 2.0 show that the proposed method can effectively improve the bottleneck link utilization and maintain a lower packet loss rate.

关 键 词：命名数据网络 拥塞控制 速率控制协议 兴趣整形 显式反馈 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]