Handover Prediction Based on Geometry Method in mmWave Communications - A Sensing Approach
Handover Prediction Based on Geometry Method in mmWave Communications - A Sensing Approach
复制标题
毫米波通信中基于几何方法的切换预测——一种传感方法
DOI：
10.1109/iccw.2018.8403584
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Husheng Li
中科院分区：
文献类型：
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作者：
Jingchao Bao;Tao Shu;Husheng Li
尽管毫米波通信为 5G 提供了许多理想的特性，但它面临着毫米波信道的特殊特性所带来的独特挑战。特别是，频繁的切换以及由此产生的高切换延迟是小型且密集的毫米波蜂窝网络面临的固有问题。由于毫米波通道容易受到视距 (LOS) 阻塞的影响，导致信号突然下降或中断，这一事实进一步加剧了这个问题。由于终端的移动会频繁地导致通信LOS被障碍物阻挡，毫米波链路必须更频繁地切换，从而导致更长的切换时间。为了解决这个问题，在本文中，我们提出了一种针对小型和密集毫米波蜂窝网络的LOS阻塞预测机制，该机制可以通过准确预测毫米波信道中的LOS组件何时被阻塞以及阻塞将持续多长时间来消除不必要的切换并使必要的切换更加平滑/无缝。基于真实毫米波通信测试台的实验验证了所提出机制的可行性和有效性。
Although mmWave communication offers many desirable properties for 5G, it faces unique challenges imposed by the special characteristics of a mmWave channel. In particular, frequent handover and the resultant high switching latency is an intrinsic problem faced by small and densified mmWave cellular networks. This issue is further exacerbated by the fact that a mmWave channel is vulnerable to the line-of-sight (LOS) blockage, which leads to a sudden drop or outage of the signal. Because a terminal's movement could frequently render the communication LOS be blocked by obstacles, a mmWave link has to handover even more frequently, causing higher handover time. To address this issue, in this paper we propose a LOS-blockage prediction mechanism for small and densified mmWave cellular networks, which can eliminate unnecessary handover and make necessary handover more smooth/seamless by exploiting accurate prediction on when the LOS component in a mmWave channel will be blocked and how long the blockage will last. The feasibility and effectiveness of the proposed mechanism are validated based on experiments in a real mmWave communication testbed.