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P2P overlay for CDN-P2P being aware of the upload capacity of participants

In this paper, we propose a method to maintain a Peer-to-Peer (P2P) overlay in live streaming systems based on a hybrid of Content Delivery Network (CDN) and P2P Technology. The key idea of the proposed method is to explicitly take into account the upload capacity of each peer in selecting peers which can directly receive the live stream from a cache server in the CDN. In addition, it prepares several backup peers to support the task of upload in such a way that a stream is fed to a P2P client if the local buffer at the client becomes scarce. The performance of the proposed scheme is evaluated by simulation.