A Cross-Layer Model for Video Multicast Based TCP-Adaptive FEC over Heterogeneous Networks

A Cross-Layer Model for Video Multicast Based TCP-Adaptive FEC over Heterogeneous Networks

Ghaida A. AL-Suhail (University of Basrah, Iraq), Liansheng Tan (Central China Normal University, China) and Rodney A. Kennedy (The Australian National University, Australia)
DOI: 10.4018/jmcmc.2009010104
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Abstract

In this article, we present a simple cross-layer model that leads to the optimal throughput of multiple users for multicasting MPEG-4 video over a heterogeneous network. For heterogeneous wired-to-wireless network, at the last wireless hop there are bit errors associated with the link-layer packets that are arising in the wireless channel, in addition of overflow packet dropping over wired links. We employ a heuristic TCP function to optimize the cross-layer model of data link and physical (radio-link) layer. An adaptive Forward-Error-Correction (FEC) scheme is applied at the byte-level as well as at the packet-level. The corresponding optimal video quality can be evaluated at each client end. The results show that a server can significantly adapt to the bandwidth and FEC codes to maximize the video quality of service (QoS) in terms of temporal scaling when a maximum network throughput for each client is reached.

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