一种基于用户行为的P2P模型

Peer to Peer Model Based on User Behavior

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。

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.