P2P网络文件分发过程及影响传播因素研究

摘要

In P2P networks, the behaviors of popular file downloaded are similar to the spread process of the epidemic diseases, which can be described by dynamics of infectious diseases spread. The diffusion process of P2P file was modeled in accordance with the epidemic dynamic model. And also the basic reproductive number was derived, which can determine the ability of file propagation. Further experiments are proved that the basic reproductive number obtained can describe the behavior of file propagation and reflect of the differential impact the different parameters on file diffusion fairly well.%在P2P网络中,流行文件的下载行为类似于流行病的传播过程,因此可以通过传染病动力学来描述P2P文件共享系统中文件的分发过程.利用传染病动力学模型,建立了一种P2P文件分发模型,并推导了确定文件传播能力的基本再生数计算公式.实验证明,得到的基本再生数公式能够很好地描述文件分发过程的行为和反映不同参数对文件传播带来的不同影响.