Research And Implementation Of Wireless Network Bandwidth Control Based On SDN

With the rapid development of wireless technology,WiFi is becoming an important way for people to surf the internet.As more and more users access the networks,the network bandwidth resource is more and more difficult to meet the needs of users,how to effectively use the network bandwidth resources,better improve the quality of network service,has become one of the important research direction of network quality of service.Traditional distributed networks easily lead to complex and heterogeneous on network structures,when deploying the new business in the network.Compared with the traditional distributed network,the software defined network(SDN)has the better network advantage,it adopted the centralized control mode,separating the data forwarding and network control layer,data forwarding only responsible for network data forwarding business,the control layer deals with the application business deployment,realizes the programing of the business..This paper mainly studies the traffic monitoring and bandwidth resources control management based on SDN,realizes the dynamic bandwidth allocation mechanism,effective use of network bandwidth resources,to achieve efficient bandwidth utilization rate of resources,and according to different needs,change the business dynamically,meet the demand of user personalized service,this paper mainly completed the following work:This article first analyzes the differences between traditional network architecture and software definition network architecture.explore the advantages of introducing software definition technologies into wireless networks,and design and realize wireless SDN router based on OpenFlow function,the network bandwidth resources are controlled using the advantages of the SDN network.Secondly for the entire system design goals and requirements,design the whole control architecture,and realize the functions of each function module in the architecture,Finally,a small experimental network was built using a wireless router that supports the function of OpenFlow,andtest the traffic monitoring and the bandwidth control function,the experimental results shows that can realize the network resources monitoring feedback,dynamically control the distribution of the network resources,improve bandwidth resource utilization.