一种新的基于P2P系统的用户行为满意度分析模型  

A new model of user-behavior satisfaction analysis based on P2P systems

作　　者：陈碧韵 倪卫明[1] 

机构地区：[1]复旦大学信息科学与工程学院,上海200433

出　　处：《太赫兹科学与电子信息学报》2015年第2期308-311,共4页Journal of Terahertz Science and Electronic Information Technology

摘　　要：长期对等(P2P)系统中的搭便车行为使得系统渐渐失去了原来分布式共享的特点。为了抑制这种行为,提出了一种新的P2P系统评价模型。该模型基于博弈论抑制模型和节点行为的激励模型的特点,对用户行为采用信誉值进行评价,信誉值的表征体现用户阶段性的表现,并采取一定的限制抑制自私节点的产生。将该模型内的各种激励机制进行数学建模,并利用自回归(AR)模型进行拟合。仿真结果表明,在该模型下,系统的评价呈周期性变化,满意度趋于平稳,在30%左右。Long-term free-riding behavior of Peer to Peer(P2P) systems makes the system gradually lose its original distributed shared characteristics. In order to prevent selfish behaviors, a new evaluation model for P2P systems is proposed based on the characteristics of game theory suppression model and incentive-based node behavior model. The reputation value which reflects the period performance of users is adopted to characterize user-behavior, and some confinement conditions are set to prevent generating selfish nodes. The various kinds of incentive mechanisms in P2P systems are mathematically modeled and fitted with Auto-Regressive(AR) model. The simulation results based on this model show that the behavior of the system evaluation changes periodically;and the satisfaction is stabilized to a smooth number, 30%.

关 键 词：博弈论 对等系统 自回归模型 用户行为 

分 类 号：O225[理学—运筹学与控制论] O212.1[理学—数学]