Research of incentive mechanism in P2P file-sharing framework

Traditional peer-to-peer(P2P) networks are typically designed around the assumption that all peers will willingly contribute resources to a global pool.System thus will suffer from Free-riders.This paper describes an incentive mechanism combined admission control with resources distribution to users based on their past contributions.Peers give higher service priority to requests from peers that can provide a simultaneous and symmetric service in return,so we can expect that the performance of whole will greatly improved.