@article {18159,
	title = {A Scalable Multiuser Framework for Video Over OFDM Networks: Fairness and Efficiency},
	journal = {Circuits and Systems for Video Technology, IEEE Transactions on},
	volume = {16},
	year = {2006},
	month = {2006/10//},
	pages = {1217 - 1231},
	abstract = {In this paper, we propose a framework to transmit multiple scalable video programs over downlink multiuser orthogonal frequency division multiplex (OFDM) networks in real time. The framework explores the scalability of the video codec and multidimensional diversity of multiuser OFDM systems to achieve the optimal service objectives subject to constraints on delay and limited system resources. We consider two essential service objectives, namely, the fairness and efficiency. Fairness concerns the video quality deviation among users who subscribe the same quality of service, and efficiency relates to how to attain the highest overall video quality using the available system resources. We formulate the fairness problem as minimizing the maximal end-to-end distortion received among all users and the efficiency problem as minimizing total end-to-end distortion of all users. Fast suboptimal algorithms are proposed to solve the above two optimization problems. The simulation results demonstrated that the proposed fairness algorithm outperforms a time division multiple (TDM) algorithm by 0.5 3 dB in terms of the worst received video quality among all users. In addition, the proposed framework can achieve a desired tradeoff between fairness and efficiency. For achieving the same average video quality among all users, the proposed framework can provide fairer video quality with 1 1.8 dB lower PSNR deviation than a TDM algorithm},
	keywords = {algorithm;video, codec;video, coding;video, communication;, deviation;downlink, deviation;OFDM, distortion;multidimensional, diversity;multiple, division, end-to-end, framework;time, Frequency, modulation;diversity, multiple, multiplex, multiuser, network;efficiency, networks;video, objectives;optimization, of, OFDM, orthogonal, over, problem;fairness, problem;maximal, problems;quality, programs;multiuser, PSNR, QUALITY, reception;image, resolution;optimisation;quality, scalable, service, service;scalable, service;video, systems;optimal, video},
	isbn = {1051-8215},
	doi = {10.1109/TCSVT.2006.883513},
	author = {Su,Guan-Ming and Han,Zhu and M. Wu and Liu,K. J.R}
}
@conference {18201,
	title = {Dynamic distortion control for 3-D embedded wavelet video over multiuser OFDM networks},
	booktitle = {Global Telecommunications Conference, 2004. GLOBECOM {\textquoteright}04. IEEE},
	volume = {2},
	year = {2004},
	month = {2004/12/03/nov},
	pages = {650 - 654 Vol.2 - 650 - 654 Vol.2},
	abstract = {In this paper, we propose a system to transmit multiple 3D embedded wavelet video programs over downlink multiuser OFDM. We consider the fairness among users and formulate the problem as minimizing the users{\textquoteright} maximal distortion subject to power, rate, and subcarrier constraints. By exploring frequency, time, and multiuser diversity in OFDM and flexibility of the 3D embedded wavelet video codec, the proposed algorithm can achieve fair video qualities among all users. Compared to a scheme similar to the current multiuser OFDM standard (IEEE 802.11a), the proposed scheme outperforms it by 1-5 dB on the worst received PSNR among all users and has much smaller PSNR deviation.},
	keywords = {3D, 802.11a;, channels;, codec;, codecs;, communication;, control;, deviation;, distortion, diversity, diversity;, downlink, dynamic, embedded, fairness;, Frequency, IEEE, LAN;, maximal, minimax, minimization;, modulation;, multimedia, multiuser, OFDM, OFDM;, PSNR, rate, reception;, streaming;, systems;, techniques;, theory;, TIME, transforms;, video, video;, wavelet, wireless},
	doi = {10.1109/GLOCOM.2004.1378042},
	author = {Su,Guan-Ming and Han,Zhu and M. Wu and Liu,K. J.R}
}
