Rate-distortion based path selection for video streaming over wireless ad-hoc networks

Authors:
Xinggong Zhang;Yan Pang;Zongming Guo
Affiliations:
Institute of Computer Science & Technology, Peking University, Beijing, China;Institute of Computer Science & Technology, Peking University, Beijing, China;Institute of Computer Science & Technology, Peking University, Beijing, China
Venue:
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
Year:
2009

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Abstract

In wireless ad-hoc networks with low bandwidth, high bit error, and node mobility, the quality of streaming video is highly dependent on the quality of routing paths. Most of existing ad-hoc routing algorithms select the path according to network parameters. However, the selected path may not be the best path for video applications. This paper proposed a rate-distortion based (RD) path selection algorithm for video streaming over wireless networks. The video distortion on application layer is used as path metric. On each link, the rate-distortion due to transmission error and congestion is estimated using queuing theory. The algorithm selects the path with the minimum expected rate-distortion as the routing path. Extensive experiments are carried out over NS-2 simulation environment. Simulation results demonstrate that RD routing algorithm can improve the quality of video streaming significantly as compared to the conventional shortest-path routing algorithm.