Abstract
Video applications such as video-on-demand and videoconferencing over wireless networks require system resources to be allocated dynamically and optimally in accordance with the time-varying environment and video contents. User-perceived quality is tending to be a crucial factor in evaluating the success of video applications. The aim of this paper is to propose a cross-layer design scheme for optimizing resource allocation of video applications over Long Term Evolution (LTE) networks based on Quality of Experience (QoE) evaluation. We propose a novel mapping model between Peak Signal-to-Noise Ratio (PSNR) and Mean Opinion Score (MOS) based on a hyperbolic tangent function, which can reflect the relation between objective system parameters and subjective perceived quality simply and precisely. The cross-layer architecture presented in this paper jointly optimizes the Application (APP) layer, the Media Access Control (MAC) layer and the Physical (PHY) layer of the wireless protocol stack. On the basis of this architecture, we present a QoE prediction function and utilize the Particle Swarm Optimization (PSO) method to solve the resource allocation problem. Simulation results show that the proposed scheme significantly outperforms the traditional scheduling scheme in terms of maximizing user-perceived quality as well as maintaining fairness among users.







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Acknowledgments
This work is supported by National Natural Science Foundation of China under Grant No. 61271179, Co-building Project of Beijing Municipal Education Commission “Cooperative Communications Platform for Multi-agent Multimedia Communications”, and Sci-tech Projects sponsored by Important National Science & Technology Specific Projects under Grant No. 2010ZX03003-001-01.
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Abbreviations Appendix
Abbreviations Appendix
LTE | Long Term Evolution |
QoE | Quality of Experience |
PSNR | Peak Signal-to-Noise Ratio |
MOS | Mean Opinion Score |
APP | Application |
MAC | Media Access Control |
PHY | Physical |
PSO | Particle Swarm Optimization |
QoS | Quality of Service |
3GPP | 3rd Generation Partnership Project |
max C/I | maximum Carrier-to-Interference |
RR | Round Robin |
PF | Proportional Fairness |
OSI | Open Systems Interconnect |
CLD | Cross-Layer Design |
MOO | Multi-Objective Optimization |
OFDM | Orthogonal Frequency Division Multiplexing |
SDMA | Space Division Multiple Access |
ITU | International Telecommunications Union |
NGMN | Next Generation Mobile Network |
UMTS | Universal Mobile Telecommunications System |
HSDPA | High Speed Downlink Packet Access |
eNB | evolved Node B |
UE | User Equipment |
AVC | Advanced Video Coding |
SBR | Source Bit Rate |
FR | Frame Rate |
PLR | Packet Loss Rate |
RB | Resource Block |
MCS | Modulation and Coding Schemes |
BER | Bit Error Rate |
SNR | Signal-to-Noise Ratio |
MSE | Mean Square Error |
ANN | Artificial Neural Networks |
MLP | Multi-Layer Perceptron |
AMC | Adaptive Modulation and Coding |
HARQ | Hybrid Automatic Repeat reQuest |
QCIF | Quarter Common Intermediate Format |
GOP | Group Of Pictures |
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Ju, Y., Lu, Z., Ling, D. et al. QoE-based cross-layer design for video applications over LTE. Multimed Tools Appl 72, 1093–1113 (2014). https://doi.org/10.1007/s11042-013-1413-0
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DOI: https://doi.org/10.1007/s11042-013-1413-0