document: Efficient search for peer-to-peer information retrieval using semantic small world This paper proposes a semantic overlay based on the small world phenomenon that facilitates efficient search for information retrieval in unstructured P2P systems . In the semantic overlay , each node maintains a number of short-range links which are semantically similar to each other , together with a small collection of long-range links that help increasing recall rate of information retrieval and reduce network traffic as well . Experimental results show that our model can improve performance by 150 % compared to Gnutella and by up to 60 % compared to the Interest-based model - a similar shortcut-based search technique .
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