本文以主干路由器实时收集NetFlow流数据为模型输入,提出网络流量实时计算模型。首先分析流持续时间等测度对模型参数的影响,考虑长流等特殊情形,接着基于统计理论选择流量计算窗口及流量计算公式,并通过统计推断最终获得真实网络流量。本文最后通过模型计算结果与同期SNMP数据比对,验证了该模型能够在一定精度范围内完成流量实时计算,从而满足多层次实时网络监测需求。 In this paper, the main router real-time NetFlow stream data collected as a model input, proposed network traffic real-time computing model. Firstly, the influence of the measurement of flow duration and other parameters on the model parameters is analyzed. Considering the special case such as long flow, the flow calculation window and flow calculation formula are selected based on the statistical theory, and the real network traffic is finally obtained through statistical inference. In the end, the model is compared with the SNMP data of the same period to verify that the model can complete the real-time traffic calculation with a certain accuracy so as to meet the needs of multi-level real-time network monitoring.