混合SDN网络中的能源节约与流量优化策略

Energy-saving and traffic engineering in hybrid SDN

针对混合软件定义网络(SDN)中的能源节约与流量优化问题,设计并实现了SDN交换机部署位置选择与链路行为优化方案。在保证数据包正确转发、链路最大利用率有限的前提下,基于改进遗传算法与贪心算法,通过优化SDN交换机的部署方案,定义其对流量的分离比例,关闭部分无效链路,调整链路最大负载,最终降低了链路的能源消耗。仿真实验结果验证了算法的正确性与高效性,并证明了该方案可以使网络能源得到充分利用,符合绿色网络的设计理念。

Aiming at the problem of energy saving and flow optimization in the hybrid software defined network（ SDN）,the location selection and link behavior optimization of the SDN switch are designed and implemented. Under the premise of ensuring the correct forwarding of the packet and limiting the maximum link utilization rate,and based on the improved genetic algorithm and greedy algorithm,we optimize the deployment plan of the SDN switch,define its splitting ratio of traffic,close some invalid links,adjust the maximum load of links,and ultimately reduce the energy consumption of links. The simulation results verify the correctness and efficiency of the algorithm,and prove that the scheme can make full use of network energy and meet the concept of green network.