A network coding scheme for SVC streaming over wireless mesh network

Authors:
Liu Yong;Sun lifeng;Yang shiqiang
Affiliations:
Tsinghua University, Beijing, China;Tsinghua University, Beijing, China;Tsinghua University, Beijing, China
Venue:
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Year:
2009

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Abstract

We argue that the conventional forward error correcting code (FEC) and retransmission solutions will become ineffective to transmit scalable video coding streaming in wireless mesh network (WMN) for the reason that video frame errors appear in bursts rather than random and the bad channel condition usually persists for a period in wireless channels. A novel SVC streaming cooperative transmission scheme is proposed in this paper. Our cooperative transmission scheme includes two stages among nodes in WMN. The first stage is selecting appropriate paths for the relevant SVC sub-layer streams and the second one is selecting nearby nodes to cache the network coding results of the adjacent sub-layer streams and retransmit the network coded packets to the user terminal for recovering the error packets. Simulation results are given to demonstrate the significant improvement of the SVC streaming reconstructive video quality.