基于动态阈值的软件定义网络节能算法研究

o enhance network robustness and respond to network burst traffic，the problem of excess resource supply and redundant design in traditional network design as well as the mismatch between network equipment energy consumption and traffic volume result in low utilization of network energy, wasting large of energy. OpenFlow as the key technology to separate the network control function from data forwarding function, has become the universal southbound interface protocol of software defined networking (SDN). Based on the certain regularity of network traffic distribution, using the OpenFlow technology to sleep and wake up the equipment, obtain real-time traffic and change the traffic route，this paper proposes an energy-saving algorithm based on dynamic threshold in software defined network (SDN). Firstly a load-balancing which minimize energy-consumption is proposed, this make sure the network can get better quality of service at the same time of saving energy. Then, for bursty traffic network, an adaptive strategy is used to update the threshold to match the network load. In the end, Simulation result shows that RTT-ES algorithm can achieve better performance in network energy-saving and coping with the bursty traffic.