MSC中基于SDN的拓扑感知RLNC重传方案  

Topology-aware RLNC retransmission scheme based on SDN in MSC

作　　者：姚玉坤[1] 任丽丹 任智[1] 冯鑫 杜文正 YAO Yukun;REN Lidan;REN Zhi;FENG Xin;DU Wenzheng(School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《系统工程与电子技术》2022年第4期1393-1400,共8页Systems Engineering and Electronics

基　　金：国家自然科学基金(61971080)资助课题。

摘　　要：为了将小蜂窝中的网络拓扑信息应用于网络编码重传过程,从而有效减少重传次数、提高系统吞吐量,提出了一种移动小蜂窝(mobile small cell,MSC)中基于软件定义网络(software defined network,SDN)的拓扑感知随机线性网络编码(random linear network coding,RLNC)重传方案(topology-aware RLNC retransmission scheme SDN based in MSC,TRRS)。首先,为了收集网络拓扑信息,设计SDN控制器端口设备映射表;其次,依据拓扑信息选择最佳编码包用于重传;最后,通过TRRS算法将网络拓扑信息嵌入编码重传过程。仿真结果表明,相比于现有的SDN与网络编码相结合的协议,TRRS方案减少了重传次数,增加了网络的弹性和吞吐量。In order to apply the network topology information in the small cell to the retransmission process of network coding,thereby effectively reducing the number of retransmissions and increasing the system throughput,a topology-aware random linear network coding(RLNC)retransmission scheme software defined network(SDN)-based in mobile small cell(MSC)(TRRS)is proposed.First,in order to collect network topology information,design the SDN controller port device mapping table.Next,select the best coded packet for retransmission according to the topology information.Finally,use the TRRS algorithm to embed the network topology information in the code retransmission process.The simulation results show that,compared with the existing SDN and network coding protocol,the TRRS scheme the number of retransmissions and increases the flexibility and throughput of the network.

关 键 词：软件定义网络 网络编码 重传 拓扑感知 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]