Optimal Cooperative Multi-Source Multimedia Transmission Scheduling in Peer-to-Peer Networks

In peer-to-peer (P2P) networks, multiple sources multimedia transmission is one of the key technology in peer-to-peer (P2P) networks because of simultaneous multimedia file sharing. However, allowing all available sources to transmit to the destination node may result in serious network congestion. Thus the selection of multiple sources is one of the key issues in the design of multi-source multimedia transmission systems in P2P networks. In this paper, a cooperative multi-source sender selection scheme to minimize the multimedia distortion is proposed, based on recent advances in restless bandits algorithms. The proposed sender selection scheme has an indexability property that dramatically simplifies the computation and implementation of the policy. Furthermore, centralized control point is not necessary in the proposed scheme, and senders can join and leave from the P2P network freely. Extensive simulation results show that the proposed scheme reduces the distortion significantly compared to the existing scheme.