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Joint uplink and downlink optimization for real-time multiuser video streaming over WLANs (2007)
| Venue: | IEEE Transactions on Circuits and Systems for Video Technology |
| Citations: | 7 - 0 self |
BibTeX
@INPROCEEDINGS{Su07jointuplink,
author = {Guan-ming Su and Zhu Han and Min Wu and Senior Member and K. J. Ray Liu},
title = {Joint uplink and downlink optimization for real-time multiuser video streaming over WLANs},
booktitle = {IEEE Transactions on Circuits and Systems for Video Technology},
year = {2007}
}
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Abstract
Abstract—In this paper, a network-aware and source-aware video streaming system is proposed to support interactive multiuser communications within single-cell and multicell IEEE 802.11 networks. Unlike the traditional streaming video services, the strict delay constraints of an interactive video streaming system pose more challenges. These challenges include the heterogeneity of uplink and downlink channel conditions experienced by different users, the multiuser resource allocation of limited radio resources, the incorporation of the cross-layer design, and the diversity of content complexities exhibited by different video sequences. With the awareness of video content and network resources, the proposed system integrates cross-layer error protection mechanism and performs dynamic resource allocation across multiple users. We formulate the proposed system as to minimize the maximal end-to-end expected distortion received by all users, subject to maximal transmission power and delay constraints. To reduce the high dimensionality of the search space, fast multiuser algorithms are proposed to find the near-optimal solutions. Compared to the strategy without dynamically and jointly allocating bandwidth resource for uplinks and downlinks, the proposed framework outperforms by 2.18 7.95 dB in terms of the average received PSNR of all users and by 3.82 11.50 dB in terms of the lowest received PSNR among all users. Furthermore, the proposed scheme can provide more uniform video quality for all users and lower quality fluctuation for each received video sequence. Index Terms—Cross-layer design, joint uplink and downlink optimization, multiuser video communication, network-aware, wireless local area networks. I.
Keyphrases
joint uplink real-time multiuser video video sequence interactive multiuser communication content complexity cross-layer design source-aware video performs dynamic resource allocation bandwidth resource traditional streaming video service proposed system multicell ieee high dimensionality network resource search space interactive video received psnr channel condition wireless local area network cross-layer error protection mechanism different user video communication maximal end-to-end near-optimal solution uniform video quality delay constraint limited radio resource multiuser resource allocation transmission power multiple user video content downlink optimization quality fluctuation average received psnr index term cross-layer design strict delay constraint framework outperforms different video sequence multiuser algorithm
