一种基于SDN的无线网络负载感知扩散算法  

Load Awareness Diffusion Algorithm for Wireless Network Based on SDN

作　　者：白燕[1] 杨桂芹[1] 陈晓辉[1] BAI Yan YANG Gui-qin CHEN Xiao-hui(School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou 730070 ,Chin)

机构地区：[1]兰州交通大学电子与信息工程学院,甘肃兰州730070

出　　处：《兰州交通大学学报》2017年第4期127-131,157,共6页Journal of Lanzhou Jiaotong University

摘　　要：针对当前无线网络中一些节点超载而另外一些节点处于轻载的问题,引入了SDN(software defined networking,软件定义网络).并根据物理学中连通器水压的原理提出了一种改进后的动态负载感知扩散算法,该算法很好地利用了节点所处负载环境这个信息,在负载迁移过程中进行了有效地收敛.通过Linux下的mininet-wifi平台搭建了系统模型,对其进行了仿真实验分析.仿真试验结果证明该扩散算法有效地减小了往返时延,提高了网络吞吐量,降低了能耗,解决了网络拥塞问题.SDN （Software Defined Networking） is introduced to solve the problem of some nodes that are overloading in the wireless network while others are under light load. And an improved dynamic load-aware diffusion algorithm is proposed based on the principle of the water pressure of the communicator in physics. The algorithm makes good use of the information of the load envi- ronment in which the node is located, and effectively converges in the process of load transfer. The system model is built by the mininet-wifi platform in Linux,and the algorthm is simulated by the experiment and analyzed. Simulation results show that the proposed algorithm effectively reduces the round-trip delay, improves the network throughput, reduces the energy consumption and solves the problem of network congestion.

关 键 词：软件定义网络 负载感知 扩散算法 网络吞吐量 网络拥塞 

分 类 号：TN915.65[电子电信—通信与信息系统]