Proceedings of the international workshop on Workshop on multimedia information retrieval
Journal of Network and Computer Applications
Collaboration in BitTorrent Systems
NETWORKING '09 Proceedings of the 8th International IFIP-TC 6 Networking Conference
GridDL: an HTTP bandwidth sharing framework
Proceedings of the 1st ACM workshop on User-provided networking: challenges and opportunities
Offloading servers with collaborative video on demand
IPTPS'08 Proceedings of the 7th international conference on Peer-to-peer systems
SMC: an energy conserving P2P file sharing model for mobile devices
MobiDE '12 Proceedings of the Eleventh ACM International Workshop on Data Engineering for Wireless and Mobile Access
Energy conservative mobile cloud infrastructure
GPC'12 Proceedings of the 7th international conference on Advances in Grid and Pervasive Computing
COINS: COalitions and INcentiveS for effective Peer-to-Peer downloads
Journal of Network and Computer Applications
Hi-index | 0.00 |
P2P systems that rely on the voluntary contribution of bandwidth by the individual peers may suffer from freeriding. To address this problem, mechanisms enforcing fairness in bandwidth sharing have been designed, usually by limiting the download bandwidth to the available upload bandwidth. As in real environments the latter is much smaller than the former, these mechanisms severely affect the download performance of most peers. In this paper we propose a system called 2Fast, which solves this problem while preserving the fairness of bandwidth sharing. In 2Fast, we form groups of peers that collaborate in downloading a file on behalf of a single group member, which can thus use its full download bandwidth. A peer in our system can use its currently idle bandwidth to help other peers in their ongoing downloads, and get in return help during its own downloads. We assess the performance of 2Fast analytically and experimentally, the latter in both real and simulated environments. We find that in realistic bandwidth limit settings, 2Fast improves the download speed by up to a factor of 3.5 in comparison to state-of-the-art P2P download protocols.