软件定义网络中一种按需路径分配的定量评估模型

2016-07-09 08:36王春枝罗晨陈宏伟
软件导刊 2016年6期
关键词:软件定义网络

王春枝 罗晨 陈宏伟

摘要:软件定义网络(SDN)技术分离了传统网络的控制层面与数据层面,目的是改造现有网络,简化网络操作,提升网络性能。利用SDN的集中式控制,提出一种路径分配的定量评估模型。首先根据网络的物理状态进行建模,从概率的角度使用马尔科夫链计算网络链路的重要性;然后在模型中同时考虑链路利用率、资源分配率、负载均衡和延时作为路径分配评价指标;最后根据不同需求对路径分配进行评估,得到最合适的路径分配方案,并用一个实例介绍了模型运作流程。实验结果表明,该方法可以按需供给,起到流量优化与负载均衡的效果。

关键词:软件定义网络;马尔科夫链;定量评估;路径分配

DOIDOI:10.11907/rjdk.161135

中图分类号:TP393文献标识码:A文章编号:1672-7800(2016)006-0179-05

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