A Congestion-Aware Search Protocol for Unstructured Peer-to-Peer Networks

13 years 10 months ago

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Peer-to-Peer (P2P) ﬁle sharing is the hottest, fastest growing application on the Internet. When designing Gnutella-like applications, the most important consideration is the scalability problem. Recently, diﬀerent search protocols have been proposed to remedy the problems in Gnutella’s ﬂooding. However, congestion due to large query loads from users and peer heterogeneity deﬁnitely impact on the performance of search protocols, and this consideration has received little attention from the research community. In this paper, we propose a congestion-aware search protocol for unstructured P2P networks. The aim of our protocol is to integrate congestion control and object discovery functionality so that it can achieve good performance under congested networks and ﬂash crowds. The simulation results show that our protocol can largely reduce a hit delay while maintaining a high hit rate, and the congestion problems such as query loss and system overloading can be eﬀectively all...

Kin Wah Kwong, Danny H. K. Tsang

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