| 提高蜂窝系统多播效率的D2D自适应协作重传 |
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| 引用本文： | 周斌,胡宏林.提高蜂窝系统多播效率的D2D自适应协作重传[J].应用科学学报,2013,31(3):221-227. |
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| 作者姓名： | 周斌 胡宏林 |
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| 作者单位： | 1. 中国科学院上海微系统与信息技术研究所，上海200050
2. 中国科学院无线传感网与通信重点实验室，上海200335
3. 上海无线通信研究中心, 上海200335 |
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| 基金项目： | 国家科技重大专项基金(No.2012ZX03003009-003);国家国际科技合作项目基金(No.2012DFG11910)资助 |
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| 摘 要： | 针对蜂窝系统中的D2D增强型多播传输，分析了D2D重传效率与重传发射者数目之间的函数关系，推导了求解最优重传发射者的数目及子集划分的闭合表达式. 以此为理论基础，提出了一种基于有限反馈的D2D自适应协作重传方案. 该方案根据D2D链路质量自适应地选择重传发射者数目及最优重传路由，实现了多播增益与
多信道分集增益的联合优化. 仿真表明，该方案可显著提高D2D重传的频谱效率, 逼近理论最优解，提升蜂窝系统多播的吞吐量.
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| 关 键 词： | D2D通信 多播 协作重传 频谱效率 |
| 收稿时间： | 2011-12-03 |
| 修稿时间： | 2012-03-12 |
Adaptive Device-to-Device Cooperative Retransmission for Improving Multicast Efficiency in Cellular Systems |
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| ZHOU Bin,HU Hong-lin.Adaptive Device-to-Device Cooperative Retransmission for Improving Multicast Efficiency in Cellular Systems[J].Journal of Applied Sciences,2013,31(3):221-227. |
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| Authors: | ZHOU Bin HU Hong-lin |
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| Institution: | 1. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences,;
Shanghai 200050, China;
2. Key Laboratory of Wireless Sensor Network and Communication, Chinese Academy of Sciences,;
Shanghai 200335, China;
3. Shanghai Research Center for Wireless Communications, Shanghai 200335, China |
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| Abstract: | We focus on device-to-device (D2D) enhanced multicast transmission in cellular systems, formulate the relationship between the number of retransmitters and the efficiency of D2D retransmission, and derive a closed-form expression to search the optimal number of D2D retransmitters and the optimal sub-cluster partition. Based on the analysis, we propose an adaptive D2D cooperative retransmission scheme with limited channel feedback, which adaptively selects the number of retransmitters and the optimal routing. Exploiting the multicast gain and multi-channel diversity jointly, the proposed scheme achieves a significant gain in terms of spectrum efficiency compared to its counterparts with a fixed number of retransmitters. |
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| Keywords: | cooperative retransmission spectrum efficiency device-to-device (D2D) communication multicast |
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