一种基于博弈论的P2P内容分发协议  

A Protocol of P2P Content Distribution Based on Game Theory

作　　者：廖枝平[1] 刘嵩[2] 黄雪华[1] 

机构地区：[1]湖南城市学院计算机科学系,湖南益阳413000 [2]湖南城市学院经济管理系,湖南益阳413000

出　　处：《湖南城市学院学报（自然科学版）》2010年第4期60-64,共5页Journal of Hunan City University:Natural Science

基　　金：湖南城市学院科研基金资助项目(07B030)

摘　　要：针对P2P大规模内容分发系统中的搭便车和公共悲剧问题,提出基于博弈论的内容分发协议,激励节点间的协作.把系统建模成不协作博弈,每个自私节点从个人理性出发,选择最大化个人收益的协议策略.在纳什均衡下,整个系统在具有大量自私节点的环境中体现出较好的协作性,促进了内容分发的效率.In order to solve the problem of free-riding and common tragedy within peer-to-peer（P2P） massive content distribution systems,this paper presents a content distribution protocol based on game theory. The protocol motivates the peers to cooperate actively with each other.The system is modeled as a non-cooperative game where each selfish peer chooses the strategy that maximizes its individual utility according to personal rationality.Under the Nash equilibrium,the system performs good cooperation in despite of abundant selfish peers and improves the efficiency of content distribution.

关 键 词：P2P 内容分发 激励机制 博弈论 

分 类 号：TN915[电子电信—通信与信息系统]