Abstract: Nowadays simulation plays an important role in evaluating and analyzing the Peer to Peer（P2P） networks due to the huge and complex structrue of the system.And simulation is the major approach to study P2P reputation models.Most papers concerned about P2P reputation model designed their own simulating procedures which are limited to their own ideas and hard to extend or modify.Meanwhile the simulating data are not precise because they are not based on certain structure that simulate the real P2P networks.To overcome the shortages above，P2P Reputation System Simulator（P2PRSSim） framework is designed.It’s a NS2-based，extensible P2P reputation simulator framework，and it provides a generic simulating platform for different P2P reputation models.The framework is described in detail，and a simulation is given at the end of this paper.

Key words: NS2, Peer to Peer（P2P）, reputation model, simulate

摘要： 由于P2P网络的庞大和复杂，模拟在P2P系统的评估和分析中有着重要的作用。对P2P系统的信任模型的模拟仿真是研究P2P信任模型的主要手段。现有的关于P2P信任模型的论文中，都是为自己的模型专程设计程序进行仿真，缺乏通用性和可扩展性，同时由于其底层的交互并非模拟真实的P2P环境，所以在仿真的数据准确度上有一定的偏差。为解决上述问题，提出了一种基于NS2的可扩展的P2P信任模型模拟平台P2PRSSim（P2P Reputation System Simulator）架构，该平台可为P2P下不同的信任模型提供通用的模拟环境。介绍了此平台的系统结构和一些重要实现细节，并模拟EigenTrust作为实例演示系统的仿真。

关键词: NS2, P2P, 信任模型, 模拟