Efficient Multipoint P2P File Sharing in MANETs

Peer-to-peer networks are a popular means of obtaining large files. Network coding has been shown as an efficient means of sharing large files in a P2P network. With network coding, all file blocks have the same relative importance. This paper presents Deluge, which uses network coding to share large files in a P2P overlay running on a MANET. Peers request file blocks from multiple server nodes and servers multicast blocks to multiple receivers, providing efficient multipoint-to-multipoint communication. Simulation results show that compared to other common download techniques, Deluge performs very well, having low download time and low energy consumption. Further, more peers participate in uploading the file and the performance of Deluge varies little with increasing overlay size, indicating good scalability.