Mobility-aware fast beam training scheme for IEEE 802.11ad/ay wireless systems
Mobility-aware fast beam training scheme for IEEE 802.11ad/ay wireless systems
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适用于 IEEE 802.11ad/ay 无线系统的移动感知快速波束训练方案
DOI：
10.1109/wcnc.2018.8377139
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Kai
中科院分区：
文献类型：
--
作者：
Li;Yi;Kai
毫米波（mmWave）技术由于巨大的频谱使用而提供多Gbps服务。IEEE 802.11ad/ay标准规定了下一代无线局域网（WLAN）在60 GHz频段的高数据速率传输。定向波束形成（BF）传输克服了高信号衰减的困难。此外，802.11ad/ay采用基于波束扇区的BF训练方案来应对复杂的室内环境。然而，传统的穷举波束搜索（EBS）需要花费大量的时间，一些文献试图设计以减少训练延迟。而且，大多数文献没有考虑移动设备的迁移率效应，这使得波束匹配效果变差。考虑到波束匹配精度和移动性影响，我们提出了移动性感知的快速波束训练（MFBT）算法。仿真结果显示了移动性如何影响系统的延迟和吞吐量。当以不同的波束宽度和匹配精度要求操作时，存在权衡。此外，我们提出的算法实现了更低的延迟和更高的吞吐量比其他现有的波束训练方案。
Millimeter wave (mmWave) technology provides multi-Gbps services thanks to huge spectrum usage. IEEE 802.11ad/ay standardizes the next generation wireless local area networks (WLANs) for high data rate transmissions at 60 GHz band. Directional beamforming (BF) transmissions overcome the difficulty of high signal attenuation. In addition, a beam sector based scheme for BF training is taken by 802.11ad/ay to tackle sophisticated indoor environments. However, conventional exhaustive beam search (EBS) takes much time and some literatures try to design to reduce training latency. Also, most of papers do not consider about the mobility effect of moving devices, which deteriorates the beam matching outcomes. With the consideration of beam matching accuracy and mobility effects corresponding to historically observed transmitted beams, we propose the mobility-aware fast beam training (MFBT) algorithm. Simulation results show how mobility affects the system in terms of latency and throughput. There are trade-offs when operating with different beamwidth and matching accuracy requirements. Moreover, our proposed algorithm achieves lower latency and higher throughput than other existing beam training schemes.