Research Article
Cross-layer rate-adaptation and joint source-channel coding for delay-constrained video streaming over wireless ad-hoc networks
@INPROCEEDINGS{10.1109/MSAN.2005.1489931, author={Qi Qu and Yong Pei and Bin Wang and James W. Modestino and Xusheng Tian and Xunqi Yu}, title={Cross-layer rate-adaptation and joint source-channel coding for delay-constrained video streaming over wireless ad-hoc networks}, proceedings={1st International ICST Conference on Multimedia Services Access Networks}, publisher={IEEE}, proceedings_a={MSAN}, year={2005}, month={8}, keywords={Ad-hoc network Cross-layer design Video communications Effective transmission rate Rate-Adaptation Joint Source-Channel Coding Delay constraint.}, doi={10.1109/MSAN.2005.1489931} }- Qi Qu
Yong Pei
Bin Wang
James W. Modestino
Xusheng Tian
Xunqi Yu
Year: 2005
Cross-layer rate-adaptation and joint source-channel coding for delay-constrained video streaming over wireless ad-hoc networks
MSAN
IEEE
DOI: 10.1109/MSAN.2005.1489931
Abstract
For video communications over wireless ad-hoc networks, there are fundamentally two different kinds of packet losses: packet losses due to channel over-pumping, where the operating transmission rate is higher than the prevailing channel capacity, and packet losses due to transmission errors. To eliminate the first kind of packet losses, rate-adaptation is necessary in order to adapt to the time-varying channel capacity. For the second kind of packet losses, error-resilient coding techniques should be used. In this paper, we propose a cross-layer rate-adaptation scheme based on an analytical study of how the effective video transmission rate is affected by the prevailing operating parameters. Furthermore, in order to provide error-resilient realtime video delivery over such wireless ad-hoc networks, a crosslayer delay-constrained joint source-channel coding (JSCC) approach, to be used in conjunction with rate-adaptation, is proposed and investigated. Simulation results demonstrate the effectiveness of this combination of cross-layer rate-adaptation and delay-constrained JSCC for supporting error-resilient video delivery over wireless ad-hoc networks operating under a delay constraint. We also demonstrate the influence of the imposed delay constraint on the overall system performance.
