An Evolutionary Game Model of Resources-sharing Mechanism in P2P Networks

Aiming at the micro and static aspects of methodology limitations in Peer-to-Peer (P2P) network resources-sharing research and based on features like self-organization, dynamic and expandability of P2P network, this paper advances an evolutionary game model for resources-sharing mechanism in P2P network peers by employing evolutionary game theory, which can analyze the dynamic evolutionary process of the mechanism. The analysis results show that the network´s evolutionary direction is related to the players´ payoff matrix as well as to the network´s initial state. Moreover, the key factors affecting the network´s evolution, i.e., cooperation profit, initial cooperation cost, resources differences among peers and the relative discount factors, are further studied respectively.