| OFDMA中继网络中联合队列和信道信息的资源分配策略 |
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| 引用本文： | 刘畅,秦晓卫,张四海,周武旸.OFDMA中继网络中联合队列和信道信息的资源分配策略[J].中国科学技术大学学报,2011(11). |
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| 作者姓名： | 刘畅 秦晓卫 张四海 周武旸 |
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| 作者单位： | 中国科学技术大学无线网络通信实验室; |
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| 基金项目： | 中国高技术研究发展(863)计划(2009AA011506); 国家科技重大专项(2009ZX03003-009,2010ZX03003-001,2010ZX03005-003); 国家科技支撑计划(2008BAH30B12); 国家重点基础研究发展(973)计划(2007CB310602); 中芬国际合作项目(2010DFB10570)资助 |
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| 摘 要： | 针对基于正交频分多址接入(OFDMA)的多中继、多用户的中继网络,研究了联合队列和信道信息的资源分配问题,目标是最大化下行系统吞吐量,同时保证用户队列的稳定.首先将子载波配对、载波对分配和功率分配问题建模为一个联合优化问题,之后通过对变量进行连续性放松,采用拉格朗日对偶方法进行求解,并利用Karush-Kuhn-Tucker(KKT)条件及匈牙利方法获得优化问题的近似最优解.性能分析与仿真结果表明,与仅利用信道信息的算法相比,所提的联合队列和信道信息的资源分配算法能够有效地提高系统吞吐量并降低用户数据包平均等待时延.
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| 关 键 词： | OFDMA 中继网络 队列和信道信息 资源分配 |
Joint queue and channel aware resource allocation in OFDMA-based relay networks |
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| LIU Chang,QIN Xiaowei,ZHANG Sihai,ZHOU Wuyang.Joint queue and channel aware resource allocation in OFDMA-based relay networks[J].Journal of University of Science and Technology of China,2011(11). |
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| Authors: | LIU Chang QIN Xiaowei ZHANG Sihai ZHOU Wuyang |
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| Institution: | LIU Chang,QIN Xiaowei,ZHANG Sihai,ZHOU Wuyang(Wireless Information Network Lab,University of Science and Technology of China,Hefei 230027,China) |
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| Abstract: | The joint channel and queue aware resource allocation problem was investigated in the downlink orthogonal frequency division multiple access(OFDMA) relay networks,where multiple relays and multiple users are supported.Our objective of resource allocation is to maximize the system throughput while stabilizing user queues in the base station.A joint optimization problem was formulated for subcarrier pairing,subcarrier-pair assignment and power allocation.Since the problem cannot be solved directly,continuous ... |
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| Keywords: | OFDMA relay network queue and channel aware resource allocation |
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