Optimization flow control—I: basic algorithm and convergence
IEEE/ACM Transactions on Networking (TON)
Cross-layer QoS control for video communications over wireless ad hoc networks
EURASIP Journal on Wireless Communications and Networking
Layered video transmission on adaptive OFDM wireless systems
EURASIP Journal on Applied Signal Processing
Computationally efficient bandwidth allocation and power control for OFDMA
IEEE Transactions on Wireless Communications
Adaptive resource allocation in multiuser OFDM systems with proportional rate constraints
IEEE Transactions on Wireless Communications
IEEE Transactions on Multimedia
An unequal packet loss resilience scheme for video over the Internet
IEEE Transactions on Multimedia
Modeling packet-loss visibility in MPEG-2 video
IEEE Transactions on Multimedia
IEEE Transactions on Consumer Electronics
Broadband wireless access solutions based on OFDM access in IEEE 802.16
IEEE Communications Magazine
Multiuser OFDM with adaptive subcarrier, bit, and power allocation
IEEE Journal on Selected Areas in Communications
Transmit power adaptation for multiuser OFDM systems
IEEE Journal on Selected Areas in Communications
AMISP: a complete content-based MPEG-2 error-resilient scheme
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
Constant quality constrained rate allocation for FGS-coded video
IEEE Transactions on Circuits and Systems for Video Technology
A unified architecture for real-time video-coding systems
IEEE Transactions on Circuits and Systems for Video Technology
Overview of the H.264/AVC video coding standard
IEEE Transactions on Circuits and Systems for Video Technology
A Scalable Multiuser Framework for Video Over OFDM Networks: Fairness and Efficiency
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Network: The Magazine of Global Internetworking
International Journal of Internet Protocol Technology
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In this paper, we propose a resource allocation algorithm to transmit multiple video bitstreams over multiuser orthogonal frequency division multiplex (OFDM) networks. The proposed algorithm explores a low-complexity rate-distortion function and diversity of multiuser OFDM systems subject to constraints on delay and limited system resources. A set of relative importance is imposed in resource allocation to assure that each user can achieve the required data rate and the quality of service. We first present a simple and effective rate-distortion function including a temporal error propagation effect and relative importance. Then we propose the cross-layer multiuser resource allocation algorithm that consists of subcarrier assignment and power allocation for minimizing the overall video distortion. The proposed subcarrier assignment algorithm utilizes the subgradient method adopting a shadow price mechanism by assuming equal power distribution for each user. Based on the result of subcarrier assignment, the power allocation algorithm maximizes the sum of distortion reduction while the relative importance for each user is maintained. In simulation results, the proposed resource allocation algorithm outperforms the time division multiple access (TDMA) and the previous resource allocation algorithm maximizing the sum capacity in terms of the worst received video quality among users. The proposed algorithm achieves PSNR gain by 1.0-3.0dB, compared to the previous resource allocation algorithm considering rate-distortion function. It is shown that the proposed resource allocation algorithm distributes the video distortion among users more fairly with relative importance compared to the previous algorithms.