Exploiting Asynchronous Amplify-and-Forward Relays to Enhance the Performance of IEEE 802.11 Networks
Exploiting Asynchronous Amplify-and-Forward Relays to Enhance the Performance of IEEE 802.11 Networks
复制标题
利用异步放大转发中继来增强 IEEE 802.11 网络的性能
DOI：
10.1109/tnet.2014.2300147
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
H. Jafarkhani
中科院分区：
文献类型：
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作者：
Sanaz Barghi;H. Jafarkhani
协作通信是解决802.11网络性能异常的一种很有前途的方法。然而，还没有提出使用多个中继来提高中继链路质量的简单解决方案。在分布式网络中使用多个中继的主要障碍是同步中继传输需要巨大的信令开销。本文从物理层和MAC层两个角度对这一问题进行了研究。在物理层，介绍了一种简单、实用的解决方案，该方案提供了来自异步中继传输的分集增益。在MAC层，讨论了一种考虑额外中继路径的速率自适应算法RA-ARF，并设计了在IEEE 802.11网络中利用中继的R-MAC层。我们的仿真结果表明，使用R-MAC后，网络性能有了很大的改善。
Cooperative communication is a promising path to recover from performance anomaly in IEEE 802.11 networks. However, a simple solution for employing multiple relays to enhance the relay link quality has not been proposed. The main obstacle for multiple relay utilization in distributed networks is that synchronizing relay transmissions requires huge signaling overhead. In this paper, we investigate the problem from both a physical-layer and MAC-layer point of view. In the physical layer, a simple, practical solution that provides diversity gain from asynchronous relay transmissions is introduced. In the MAC layer, a rate adaptation algorithm, RA-ARF, that takes the extra relay path into account is discussed, and R-MAC is designed to utilize relays in IEEE 802.11 networks. Our simulation results show considerable improvement in network performance using R-MAC.
影响因子：
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作者：
Kamerman, A;Monteban, L
通讯作者：
Monteban, L