PlanetLab: an overlay testbed for broad-coverage services
ACM SIGCOMM Computer Communication Review
Bittorrent is an auction: analyzing and improving bittorrent's incentives
Proceedings of the ACM SIGCOMM 2008 conference on Data communication
Towards an Incentive Mechanism for Peer-to-Peer Multimedia Live Streaming Systems
P2P '08 Proceedings of the 2008 Eighth International Conference on Peer-to-Peer Computing
Free Riding in Peer-to-Peer Networks
IEEE Internet Computing
Topology Dynamics in a P2PTV Network
NETWORKING '09 Proceedings of the 8th International IFIP-TC 6 Networking Conference
Contracts: practical contribution incentives for P2P live streaming
NSDI'10 Proceedings of the 7th USENIX conference on Networked systems design and implementation
FlightPath: obedience vs. choice in cooperative services
OSDI'08 Proceedings of the 8th USENIX conference on Operating systems design and implementation
Discovering Free-Riders Before Trading: A Simple Approach
ICPADS '10 Proceedings of the 2010 IEEE 16th International Conference on Parallel and Distributed Systems
LiFTinG: lightweight freerider-tracking in gossip
Proceedings of the ACM/IFIP/USENIX 11th International Conference on Middleware
NETWORKING'10 Proceedings of the 9th IFIP TC 6 international conference on Networking
A Measurement Study of a Large-Scale P2P IPTV System
IEEE Transactions on Multimedia
SopCast P2P live streaming: live session traces and analysis
Proceedings of the 4th ACM Multimedia Systems Conference
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The lack of cooperation in Peer-to-Peer (P2P) applications poses serious challenges to the quality of service provided to their clients, specifically in P2P live streaming applications given their strict real-time constraints. We here investigate the potential of exploiting topological properties of the P2P overlay network to predict the level of cooperation of a peer, measured by the ratio of the upload to the download traffic during a pre-defined time window. Using data collected from SopCast, we first show that centrality metrics provide good evidence of a peer's cooperation level in the system. We then develop a regression-based model that is able to estimate, with reasonable accuracy, the level of cooperation of a peer in the near future given its centrality measures in the recent past. Our proposed strategy complements existing incentive mechanisms for cooperation in P2P live streaming, and can be applied to detect non-cooperative peers.