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Adaptive Resource Allocation for Scalable Video Transmission over OFDMA Systems

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Abstract

We propose an adaptive resource allocation algorithm for scalable H.264 video transmission over orthogonal frequency-division multiple-access (OFDMA) systems. The algorithm explores the scalability of the video codec and the multiuser diversity of OFDMA systems to achieve enhanced efficiency and video quality. We use the peak signal-to-noise ratio (PSNR) as the measure metric of video quality, and jointly optimize the video layer extraction and radio resource allocation, considering the heterogeneity of video sources and channel conditions. Given the fact that different quality layers of the video have different importance, an adaptive modulation and coding scheme is proposed where a fixed coding rate is used for each quality layer, and unequal error protection is implemented for different layers. We also propose a subcarrier allocation algorithm to assign subcarriers for different layers of different users’ videos to maximize the average PSNR of users while satisfying the base layer requirement. The proposed resource allocation algorithm has a low complexity and is suitable for practical implementations. We further develop an end-to-end simulation testbed to demonstrate the effectiveness of the proposed transmission scheme.

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Authors and Affiliations

  1. Transport Planning and Research Institute, The Ministry of Transport, Beijing, 100028, People’s Republic of China

    Zan Yang

  2. State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing, 100871, People’s Republic of China

    Yuping Zhao

Authors
  1. Zan Yang
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  2. Yuping Zhao
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Correspondence to Zan Yang.

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Yang, Z., Zhao, Y. Adaptive Resource Allocation for Scalable Video Transmission over OFDMA Systems. Wireless Pers Commun 91, 79–99 (2016). https://doi.org/10.1007/s11277-016-3446-y

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