Research On BitTorrent Network Flow Controlling Oriented CHPA Algorithm

A Peer-to-peer file sharing system such as BitTorrent performs better than traditional client-server systems in"flash crowd"scenario taking advantage of"perpendicular"bandwidth between peer nodes.However large amount of backbone bandwidth in the Internet is consumed by these ubiquitous peer-to-peer connections.To solve this problem,in this paper,we propose the Centralized Hierarchical Peer-node Assignment(CHPA)to globally manage peer-to-peer traffic by intentionally setting up connections within local area networks.Through the network distance measurement,all nodes with their neighboring nodes in a sub-group,the same group Nodes can establish a connection.The Experiment result shows that:in the simulate environment,with CHPA we can achieve higher proportion of local area network traffic while download time of BT is not apparently affected.So we have reached a conclusion:Restrictions on the flow of data within the local area network is a good way to reduce backbone load.