网络业务流模型综述

Survey of Modeling of Network Traffic

通信网络需要提供满足用户需求的QoS(quality of service)，这就需要业务流模型能准确地捕获实际业务流的统计特征。业务流模型在网络的流量控制及性能分析中都起至关重要的作用。随着网络业务类型不断增加，实际网络中业务流特性越来越复杂，表现为突发性、长相关性或自相似性等。这使得业务流建模方法的研究得到不断发展。文中就当前网络的业务流特性，分析了现有的业务流模型，并指出了这些建模方法的特点。

Communication network needs to supply users with QoS (quality of service). So traffic modeling must be able to capture the statistical characteristics of actual traffic. Traffic modeling play an important role in traffic control and performance analysis of networks. With the increment of network traffic types, the traffic features of actual network become more and more complex, as characterized with bursts?short range dependence and selfsimilarity and so on. The studies of traffic modeling have a perpetual development. In this article, the features of network traffic are discussed firstly, then the current traffic models are analyzed and the features of modeling methods are pointed out.