The Community Characteristic Based Controller Deployment Strategy for SDNs
The Community Characteristic Based Controller Deployment Strategy for SDNs
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DOI：
10.1109/glocom.2018.8647196
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
Lin Yao;Xin Zhao;Guowei Wu;M. Obaidat
中科院分区：
文献类型：
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作者：
Lin Yao;Xin Zhao;Guowei Wu;M. Obaidat
为了解决软件定义网络（SDN）中单个控制器的瓶颈问题，目前大多数基于多控制器的工作都集中在减少交换机和相应控制器之间的传播延迟上。然而，这种方法忽略了控制器之间的同步，这可能会影响网络性能。此外，基于带外的控制器部署忽略了交换机之间的关联，这是相当昂贵的。在本文中，我们提出了一个社区特征为基础的策略，以实现控制器的布局与最佳的延迟和平衡的控制器负载。我们首先根据交换机之间的相关性划分网络域，然后通过协调控制器之间的传播延迟和控制器和交换机之间的控制延迟来设计我们的控制器部署策略。采用带内控制方式代替欧氏距离计算网络实体间的距离.仿真结果表明，该策略可以获得更低的传播延迟和更好的负载平衡。
To solve the bottleneck of a single controller in software-defined networks (SDNs), most of current works based on multiple controllers focus on decreasing propagation delay between the switch and the corresponding controller. However,this kind of methods ignores the synchronization between controllers, which may affect the network performance. Moreover, the controller deployment based on out-band has neglected the association between switches, which is quite costly. In this paper, we propose a community characteristic based strategy to achieve controller placement with optimal latency and balanced controller load. We first divide the network domain according to the relevance between switches, and then we design our controller deployment strategy by reconciling the propagation delay between controllers and the control delay between controllers and switches. We adopt in- band control mode instead of Euclidean distance to compute the distance among network entities. The simulation results show that our strategy can gain lower propagation delay latency and better load balance.