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P2P video streaming combining SVC and MDC

100%

López-Fuentes F.

International Journal of Applied Mathematics and Computer Science

2011

tom 21

nr 2

295-306

In this paper we propose and evaluate a combined SVC-MDC (Scalable Video Coding & Multiple Description Video Coding) video coding scheme for Peer-to-Peer (P2P) video multicast. The proposed scheme is based on a full cooperation established between the peer sites, which contribute their upload capacity during video distribution. The source site splits the video content into many small blocks and assigns each block to a single peer for redistribution. Our solution is implemented in a fully meshed P2P network in which peers are connected to each other via UDP (User Datagram Protocol) links. The video content is encoded by using the Scalable Video Coding (SVC) method. We present a flow control mechanism that allows us to optimize dynamically the overall throughput and to automatically adjust video quality for each peer. Thus, peers with different upload capacity receive different video quality. We also combine the SVC method with Multiple Description Coding (MDC) to alleviate the packet loss problem. We implemented and tested this approach in the PlanetLab infrastructure. The obtained results show that our solution achieves good performance and remarkable video quality in the presence of packet loss.

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A scheme of resource allocation and stability for peer-to-peer file-sharing networks

88%

Li S., Sun W., E C.-G., Shi L.

International Journal of Applied Mathematics and Computer Science

2016

tom 26

nr 3

707-719

Peer-to-peer (P2P) networks offer a cost-effective and easily deployable framework for sharing content. However, P2P file-sharing applications face a fundamental problem of unfairness. Pricing is regarded as an effective way to provide incentives to peers to cooperate. In this paper we propose a pricing scheme to achieve reasonable resource allocation in P2P file-sharing networks, and give an interpretation for the utility maximization problem and its sub-problems from an economic point of view. We also deduce the exact expression of optimal resource allocation for each peer, and confirm it with both simulation and optimization software. In order to realize the optimum in a decentralized architecture, we present a novel price-based algorithm and discuss its stability based on Lyapunov stability theory. Simulation results confirm that the proposed algorithm can attain an optimum within reasonable convergence times.

Ograniczanie wyników

2 International Journal of Applied Mathematics and Computer Science

1 E C.-G.

1 Li S.

1 López-Fuentes F.

1 Shi L.

1 Sun W.

1 2016

1 2011

Wyniki wyszukiwania

P2P video streaming combining SVC and MDC

A scheme of resource allocation and stability for peer-to-peer file-sharing networks