A Distributed Trust Model Based on Reputation Management of Peers for P2P VoD Services

作者：Huang, Guimin^*; Hu, Min; Zhou, Ya; Liu, Pingshan; Zhang, Yanchun

来源：KSII Transactions on Internet and Information Systems, 2012, 6(9): 2285-2301.

DOI：10.3837/tiis.2012.09.018

• P2P
• VoD
• QoS
• reputation values
• markov chain

Peer-to-Peer (P2P) networks are becoming more and more popular in video content delivery services, such as Video on Demand (VoD). Scalability feature of P2P allows a higher number of simultaneous users at a given server load and bandwidth to use stream service. However, the quality of service (QoS) in these networks is difficult to be guaranteed because of the free-riding problem that nodes download the recourses while never uploading recourses, which degrades the performance of P2P VoD networks. In this paper, a distributed trust model is designed to reduce node's free-riding phenomenon in P2P VoD networks. In this model, the P2P network is abstracted to be a super node hierarchical structure to monitor the reputation of nodes. In order to calculate the reputation of nodes, the Hidden Markov Model (HMM) is introduced in this paper. Besides, a distinction algorithm is proposed to distinguish the free-riders and malicious nodes. The free-riders are the nodes which have a low frequency to free-ride. And the malicious nodes have a high frequency to free-ride. The distinction algorithm takes different measures to response to the request of these two kinds of free-riders. The simulation results demonstrate that this proposed trust model can improve QoS effectively in P2P VoD networks.

• 出版日期2012-9-26
• 单位桂林电子科技大学