Quality-oriented Rate Control and Resource Allocation in Time-Varying OFDMA Networks
Quality-oriented Rate Control and Resource Allocation in Time-Varying OFDMA Networks
复制标题
时变 OFDMA 网络中面向质量的速率控制和资源分配
DOI：
10.1109/tvt.2016.2575920
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发表时间：
2017-03-01
影响因子：
6.8
通讯作者：
Kwak, Kyung Sup
中科院分区：
文献类型：
--
作者：
Guo, Yashuang;Yang, Qinghai;Kwak, Kyung Sup
在本文中，我们提出了一种资源管理方案，在正交频分多址（OFDMA）网络中的点播视频流与时变信道和用户的个性化质量要求。我们设计了一个用户质量满意度模型来评价用户对个性化质量需求的满意度。为了执行动态资源管理，我们提出了一个联合速率控制（RC）与质量调整在应用层和资源分配（RA）与功率分配和子载波分配在物理层。通过使用李雅普诺夫优化技术，我们开发了一个联合RC和RA（JRCRA）算法，以最大限度地提高所有用户的时间平均质量满意度（QSAU）。我们表明，没有任何先验知识的信道统计的JRCRA算法实现的QSAU可以任意达到最佳的QSAU实现的算法与信道统计的完整知识。仿真结果验证了JRCRA算法的优越性。
In this paper, we propose a resource management scheme for on-demand video streaming in orthogonal frequency-division multiple access (OFDMA) networks with both time-varying channels and a user's personalized quality requirement. We design a user quality satisfaction model to evaluate the degree of the user quality satisfaction with respect to his/her personalized quality requirement. To perform the dynamic resource management, we propose a joint rate control (RC) associated with the quality adjustment at the application layer and resource allocation (RA) associated with the power allocation and subcarrier assignment at the physical layer. By using the Lyapunov optimization technique, we develop a joint RC and RA (JRCRA) algorithm to maximize the time-averaged quality satisfaction of all users (QSAU). We show that the QSAU achieved by the JRCRA algorithm without any prior knowledge of the channel statistics can arbitrarily attain the optimal QSAU achieved by the algorithm with a complete knowledge of the channel statistics. Simulation results verify the advantages of the proposed JRCRA algorithm.