Abstract
In the case of video streaming over wireless channels, burst errors may lead to serious video quality degradation. By jointly exploiting the scheduling mechanism on different communication layers, this paper proposes a quality-aware cross-layer scheduling scheme to achieve unequal error control for each Latency-constraint Frame Set (LFS) of a video stream. After a network-layer agent at base station firstly utilizes the network-layer packet scheduling to provide packet-granularity importance classification for the current LFS, a link-layer agent at base station further utilizes the Radio-Link-Unit (RLU) scheduling to implement finer selective retransmission of the current LFS. Under scheduling delay and bandwidth constraints, the proposed scheme can be aware of the application-layer quality and time-varying channel conditions, and hence burst errors can simply be shifted to lower-priority transmission units in the current LFS. Simulation results demonstrate that the proposed scheme has strong robustness against burst errors, and thus improves the overall received quality of the video stream over wireless channels.
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Communication author: Liu Hao, born in 1977, male, Ph.D..
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Liu, H., Zhao, S. & Qian, J. Quality-aware cross-layer scheduling for robust video streaming over wireless channels. J. Electron.(China) 28, 303–312 (2011). https://doi.org/10.1007/s11767-011-0610-0
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DOI: https://doi.org/10.1007/s11767-011-0610-0