Design And Implementation Of Spatial Network Traffic Control System Based On SDN

With the rapid advancement of ground Internet technology and the complexity of space missions,people's attention has gradually shifted to the space network,resulting in a strong demand for the establishment of an integrated network between heaven and earth.Space network is a network system based on various space platforms to receive,transmit and process information in space,including satellites,unmanned aerial vehicles and other platforms.Compared with the ground,space network has a unique advantage and plays a very important role in many aspects such as emergency communication,aerospace and so on.It is of great significance to the strategic interests of the country.Compared with the ground network,the nodes in the satellite network are difficult to observe and control,and the network equipment is extremely expensive.The application of the traditional network architecture in the large-scale satellite network makes it impossible to configure the network flexibly.Network traffic can accurately reflect the normal operation and status of a network,which is an important indicator to measure the normal operation of a network.As the number of users of my country's satellite communication network increases,network traffic also shows great changes and uncertainties.Sex is more difficult to control.In response to the above problems,this paper proposes a spatial network traffic control system based on the Software Defined Network(SDN)architecture to realize the analysis and collection of network traffic information,and complete the spatial network traffic based on the collected key information.Control.The use of traffic control technology can greatly alleviate the burden of the entire network and manage network traffic,which has far-reaching significance in network planning,network security,and network tuning.Firstly,this paper introduces and analyzes the characteristics of space network,and meanwhile analyzes the application of SDN architecture in space network.The design of the traffic information collection module can carry out statistics on the Packet?In messages in the network,measure the delay between links and monitor the real-time bandwidth of ports,and verify the accuracy of the information collection.Secondly,this article analyzes the relevant key technologies of traffic control,including detection of abnormal traffic,network traffic prediction and traffic scheduling technology.Use entropy-based and flow-table feature values to detect DDo S(Distributed Denial of Service)attacks that occur in the network;analyze the self-similar characteristics of network traffic,and use SVR(Support Vector Regression)and deep learning neural networks to analyze the traffic Forecast;further use the bandwidth information collected in real time to achieve traffic scheduling based on the degree of link bandwidth congestion.Finally,this paper designs and implements the abnormal traffic detection,traffic prediction and traffic scheduling in the space network traffic control system,and tests the functional characteristics of the application of the space network traffic control system based on SDN in the simulation environment of Mininet.The simulation results show that based on the space of SDN network traffic control system can accurately detect the occurrence of abnormal flow,can more accurately predict the future situation of traffic,can increase the traffic scheduling space network throughput,provides more space for network traffic management method for reference,strengthen the space network traffic management,Improve the communication quality of users.