曾 凡 荣， 张毅^*

（  重庆邮电大学通信学院；  ）

摘要： 基于当前SDN网络在集中控制方面存在智能化和灵活性方面的不足，提出了一种监测底层网络链路利用信息的方法。该方法充分考虑控制器的开销，利用openflow协议对信息的统计特性，并结合自适应算法合理的选择需要轮询的交换机，由控制器周期性的轮询获取这些统计信息。该算法既考虑了信息收集的有效性，同时兼顾了系统的开销，且降低了控制器的单点效应。仿真结果表明该方法可以完成对链路利用信息的监测，降低控制器的负载，且提高了系统的稳定性。
关键词： SDN；集中控制；自适应；监测 ；开销

zengfanrong^1,， zhangyi^2,*

（  1、Communication Institute,chongqin university of posts and telecommunications；       2、Communication Institute,Chongqing university of posts and telecommunications；  ）

Abstract： Due to lack of intelligence and flexibility in centralized control of current SDN network, we proposed a method to monitoring the underlying network of link utilization information. This method fully considers the cost of controller,and make use of the statistical properties of openflow protocol on information. These statistics achieved by the controller periodically polling. Combined with an self-adaptive algorithm to reasonable choice switches which need to polling. The algorithm takes into account both the validity of the information collected and cost of the system, and to avoid the single point effect of controller? The Simulation results show that this method can be completed on a link to information monitoring, reduce the overhead of controller, and improve the stability of the system.

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