摘要：

为研究用户行为与P2P系统的相互作用，提出一种P2P文件共享系统的数学模型。将系统引导策略引入P2P用户行为建模，综合考虑用户下载文件前后的行为特征，分析引导策略对用户行为和系统性能的影响，比较3种引导策略的效果。仿真结果表明，系统引导能有效提高用户首次选择高质量文件下载的概率，减少重新下载的次数和下载总流量。

关键词: P2P文件共享, 用户行为, 引导策略, 流量, 重审

Abstract:

In order to study the interaction between user behavior and Peer to Peer(P2P) file sharing systems, this paper proposes a mathematical model. The contributions include: considering the guide strategy factor for the first time in P2P model based on user behaviors; analyzing the impacts of guide strategy on user behaviors and system performance; comparing the effects of three guide strategies. Simulation results show that guide strategy can effectively improve the probability of first downloading good file, and reduce the number of retrial and overall traffic.

Key words: Peer to Peer(P2P) file sharing, user behavior, guide strategy, traffic, retry

中图分类号: 

• TP393.08