基于混沌理论与改进回声状态网络的网络流量多步预测

网络流量预测是网络管理及网络拥塞控制的重要问题，针对该问题提出一种基于混沌理论与改进回声状态网络的网络流量预测方法。首先利用0-1混沌测试法与最大Lyapunov指数法对不同时间尺度下的网络流量样本数据进行分析，确定网络流量在不同时间尺度下都具有混沌特性。将相空间重构技术引入网络流量预测，通过C-C方法确定延迟时间，G-P算法确定嵌入维数。对网络流量时间序列进行相空间重构之后，利用一种改进的回声状态网络进行网络流量的多步预测。提出一种改进的和声搜索优化算法对回声状态网络的相关参数进行优化以提高预测精度。利用网络流量的公共数据集以及实际数据进行了仿真，结果表明，提出的预测方法具有更高的预测精度以及更小的预测误差。

Network traffic multi-step prediction based on chaos theory and improved echo state network

Network traffic prediction was an important problem of network management and network congestion control. In order to solve this problem, a network traffic prediction method based on chaos theory and improved echo state network was proposed. Firstly, network traffic sample with different time scale were analyzed by 0-1 test algorithm for chaos and maximum Lyapunov exponent, the calculation results show that the network traffic has chaotic characteristics in different time scale. The phase space reconstruction technique was introduced for the prediction of network traffic, the delay time was determined through the C-C method, the embedding dimension was determined through the G-P algorithm. Network traffic time series was processed with phase space reconstruction, the multi-step prediction of network traffic was achieved by an improved echo state network. In order to improve the prediction precision, the key dynamic reservoir and prediction parameters of echo state network were optimized by an improved harmony search algorithm. Through the simulation on public and actual network traffic data, the results verify the proposed prediction method has higher prediction accuracy and smaller prediction error.