Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (6): 35-41.doi: 10.3969/j.issn.1000-565X.2010.06.007

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Cross-Layer Optimization of Video Stream in Multi-Channel Wireless Multihop Networks

Huang Xin1  Feng Sui-li1  Ke Feng1  Zhuang Hong-cheng2   

  1. 1.School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;2.Huawei Technologies Co.,Ltd.,Shenzhen 518129,Guangdong,China
  • Received:2009-09-03 Revised:2009-10-20 Online:2010-06-25 Published:2010-06-25
  • Contact: 黄鑫（1984-），女，博士生，主要从事无线多跳网络跨层优化研究． E-mail:huang．xinl@mail．scut．edu．cn
  • About author:黄鑫（1984-），女，博士生，主要从事无线多跳网络跨层优化研究．
  • Supported by:

    粤港关键领域重点突破项目（20060104-2）

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Abstract:

In order to improve the transmission quality of video streams in multi-channel wireless multihop networks,a distributed cross-layer optimization algorithm is presented.In this algorithm,first,the channel allocation,interference,bandwidth allocation,delay allocation and video stream distrotion are all modeled.Then,based on the convex programming and the theory of Lagrangian dual decomposition,the total distortion of the video streams under end-to-end delay constraints is minimized by adjusting the source coding rate,the link bandwidth,the upper average link delay and the radio-frequency and channel allocation.Theoretical analyses and numerical simulations show that the proposed distributed algorithm can converge to the global optimum.

Key words: wireless multihop network, cross-layer optimization, video stream distortion, convex programming, Lagrangian dual decomposition