一种新颖的P2P文件共享系统的动力学模型

Novel Dynamic Model for Peer-to-Peer File Sharing Systems

提出一种新颖的P2P文件共享系统的动力性学模型.在模型中定义了描述节点之间相互作用关系的状态量.同时,分析了P2P文件共享系统中最重要的算法,如节点选择算法及带宽分配算法等等,最终给出了模型的具体形式.最后,网络实验和仿真证明了此模型能够反映P2P文件共享系统的本质特征,从而为设计高性能P2P网络,改进现有的P2P算法,以及研究P2P系统的稳定性提供一种新颖的方法.

With widely application of Peer-to-Peer（P2P） file sharing technique, the P2P Waffle occupies most of the currcmt Internet traffic. Modeling the behaviors of P2P file sharing systems is important for designing and evaluating such systems. In this paper, we develop a novel model to character the behaviors of P2P sharing systems. States in microcosmic view are defined and used to describe the interaction among the peers in systems. Then,a model in general form for P2P sharing systems is proposed. According to common softwares policies in P2P systems, we embody the model. To verify the validity and reasonability of the proposed model, P2P simulations are conducted.