4 August 2010 IPTV multicast with peer-assisted lossy error control
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Proceedings Volume 7744, Visual Communications and Image Processing 2010; 77440T (2010) https://doi.org/10.1117/12.863273
Event: Visual Communications and Image Processing 2010, 2010, Huangshan, China
Abstract
Emerging IPTV technology uses source-specific IP multicast to deliver television programs to end-users. To provide reliable IPTV services over the error-prone DSL access networks, a combination of multicast forward error correction (FEC) and unicast retransmissions is employed to mitigate the impulse noises in DSL links. In existing systems, the retransmission function is provided by the Retransmission Servers sitting at the edge of the core network. In this work, we propose an alternative distributed solution where the burden of packet loss repair is partially shifted to the peer IP set-top boxes. Through Peer-Assisted Repair (PAR) protocol, we demonstrate how the packet repairs can be delivered in a timely, reliable and decentralized manner using the combination of server-peer coordination and redundancy of repairs. We also show that this distributed protocol can be seamlessly integrated with an application-layer source-aware error protection mechanism called forward and retransmitted Systematic Lossy Error Protection (SLEP/SLEPr). Simulations show that this joint PARSLEP/ SLEPr framework not only effectively mitigates the bottleneck experienced by the Retransmission Servers, thus greatly enhancing the scalability of the system, but also efficiently improves the resistance to the impulse noise.
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Zhi Li, Zhi Li, Xiaoqing Zhu, Xiaoqing Zhu, Ali C. Begen, Ali C. Begen, Bernd Girod, Bernd Girod, } "IPTV multicast with peer-assisted lossy error control", Proc. SPIE 7744, Visual Communications and Image Processing 2010, 77440T (4 August 2010); doi: 10.1117/12.863273; https://doi.org/10.1117/12.863273
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