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Gradually Reconfiguring Virtual Network Topologies Based on Estimated Traffic Matrices

机译:根据估计的流量矩阵逐步重新配置虚拟网络拓扑

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摘要

Traffic matrix is essential to traffic engineering (TE) methods. Because it is difficult to monitor traffic matrices directly, several methods for estimating them from link loads have been proposed. However, estimated traffic matrix includes estimation errors which degrade the performance of TE significantly. In this paper, we propose a method that reduces estimation errors while reconfiguring the virtual network topology (VNT) by cooperating with the VNT reconfiguration. In our method, the VNT reconfiguration is divided into multiple stages instead of reconfiguring the suitable VNT at once. By dividing the VNT reconfiguration into multiple stages, our traffic matrix estimation method calibrates and reduces the estimation errors in each stage by using information monitored in prior stages. We also investigate the effectiveness of our proposal using simulations. The results show that our method can improve the accuracy of the traffic matrix estimation and achieve an adequate VNT as is the case with the reconfiguration using the actual traffic matrices.
机译:流量矩阵对于流量工程(TE)方法至关重要。由于难以直接监视流量矩阵,因此提出了几种从链路负载估算流量矩阵的方法。但是,估计的流量矩阵包括估计误差,这会严重降低TE的性能。在本文中,我们提出了一种方法,该方法可通过与VNT重新配置协作来减少估计误差,同时重新配置虚拟网络拓扑(VNT)。在我们的方法中,VNT重新配置分为多个阶段,而不是立即重新配置合适的VNT。通过将VNT重新配置分为多个阶段,我们的流量矩阵估算方法通过使用先前阶段中监视的信息来校准并减少每个阶段中的估算误差。我们还使用模拟调查了我们建议的有效性。结果表明,与使用实际流量矩阵进行重新配置的情况一样,我们的方法可以提高流量矩阵估计的准确性并获得足够的VNT。

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