A novel cooperative caching scheme for unstrutured peer-to-peer networks

Authors:
Tomonori Mori;Takuya Asaka;Tatsuro Takahashi
Affiliations:
Communications and Computer Engineering, Graduate School of Informatics, Kyoto University, Kyoto, Japan;Communications and Computer Engineering, Graduate School of Informatics, Kyoto University, Kyoto, Japan;Communications and Computer Engineering, Graduate School of Informatics, Kyoto University, Kyoto, Japan
Venue:
CCNC'09 Proceedings of the 6th IEEE Conference on Consumer Communications and Networking Conference
Year:
2009

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Abstract

Unstructured peer-to-peer (P2P) networks have power-law topology, and the number of content requests also follows power-law distributions. These properties cause two problems: the high-load of high-degree peers and the quick deletion of rarely requested contents. We propose a new caching scheme that replaces the cache on the basis of the number of request messages per unit of time. It significantly reduces the load of high-degree peers and improves the hit rate. Moreover, we use a simulation to show the effectivity of our proposed method.