区别服务下的P2P网络性能分析

P2P Network Performance Analysis under Differentiated Services

摘要: 为研究P2P网络性能，降低系统能耗，抑制“搭便车”现象，更好的提升系统性能。本文将混合P2P网络中节点的动态变化抽象为排队模型，建立具有两类服务台、部分服务台异步多重休假的M/M/c h排队模型。通过矩阵几何解方法，对系统的稳态分布进行求解，进而给出系统平均队长、平均等待时间以及系统总能耗等性能指标。通过数值实验，分析重要参数对各指标的影响，并探讨该模型下的纳什均衡与社会最优策略，得到最优参数，为降低P2P网络系统能耗提供理论支持。

Abstract: To study the performance of P2P networks, reduce system energy consumption, suppress free riding, and better improve system performance, this article abstracts the dynamic changes of nodes in hybrid P2P networks as a queuing model and establishes an M/M/c h queuing model with two types of service stations and asynchronous multiple vacations for some service stations. By using the matrix geometry solution method, the steady-state distribution of the system is solved, and performance indicators such as the average system length, average waiting time, and total system energy consumption are given. Through numerical experiments, analyze the impact of important parameters on various indicators, and explore the Nash equilibrium and social optimal strategies under this model, obtain the optimal parameters, and provide theoretical support for reducing energy consumption in P2P network systems.