Content-aware packet scheduling for multi-session video streaming over wireless mesh networks
2009
Packet scheduling is of great importance to the performance optimization of multi-session video streaming over
wireless mesh networks. In this paper, we explore the time-varying characteristics of the input videos and propose a
Content-and-Deadline-Aware Scheduling (CDAS) scheme for multi-session video streaming over wireless multi-hop
networks. The basic idea of proposed scheduling scheme is to choose and transmit more packets with higher importance
while meeting their stringent delay constraints, to maximize the constructed video quality at the receivers' side. More
specifically, the packet schedule is determined in such a way that not only the backlog, but also the contributions to the
reconstructed videos as well as the stringent delay constraints and time-varying network condition are all considered.
This is enabled by our proposed priority model composed of two major components: content priority and scheduling
priority. For the content priority, we develop a fast and efficient packet-level transmission distortion model to accurately
predict the corresponding distortion for a lost packet at the encoder side. For scheduling priority, we consider delay
requirement and dynamic network conditions of subsequent transmission links. Our extensive simulations demonstrate
that the proposed transmission distortion model and the CDAS policy significantly improve the performance of
multi-session video streaming over wireless mesh networks.
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