SHARING OF DIGITAL CONTENTS IN P2P NETWORKS EXPLOITING LOCALIZATION DATA

摘要

A method for enabling sharing of content files among nodes of a P2P network (100) is provided. The P2P network (100) comprises a plurality of sub-networks (110(i)) each one including a respective plurality of nodes (Pj(i)) capable of storing content files (FILE(k)). Each sub-network (110(i)) has associated therewith a corresponding hash table (DHT(i)) for the indexing of the content files (FILE(k)) stored in the nodes (Pj(i)) of the sub-network (110(i)); said hash table (DHT(i)) is distributed among at least some of the nodes of the sub-network (110(i)). For each content file (FILE(k)) stored in at least one node (Pj(i)) of the sub-network (110(i)), said hash table (DHT(i)) comprises a corresponding node list (320(k)) of the sub-network nodes (Pj (i)) which store said content file (FILE(k)). The method comprises associating to each node (Pj(i)) of the sub-network (110(i)) listed in the node list (320(k)) corresponding to a content file (FILE(k)) localization data providing an indication of the localization of said node (Pj(i)) within said sub-network (110(i)); the method further comprises exploiting said localization data for defining a corresponding preferential list of the nodes (Pj(i)) storing said content file (FILE(k)) for the downloading of said content file (FILE(k)) by a requesting node (Pj(i)).