关键词: NS2, P2P, 信任模型, 模拟

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