To progress cost-effective deployment of millimeter-wave (mmWave) wireless networks for indoor users, the prediction of indoor-to-indoor (I2I) and outdoor-to-indoor (O2I) coverage based on field measurement studies is of great interest to the future generation mobile communication system. First, measurements in I2I and O2I scenarios, which have advantages in terms of achieving a fair comparison of channel characteristics across different mmWave bands and bandwidths, are performed. Next, the developed dual-slope path loss model with a break-point distance is found to well fit omnidirectional and directional measured I2I data, especially at 39.5 GHz, revealing that the transition from lit or shadow regions to totally blocked regions is abrupt. Combined with space-time propagation characteristics, the indoor blockage effect on path loss and angular spread is investigated, therein being essential for the design of beam-steering and tracking algorithms. Double-directional measurement results show that most dominant paths arrive along the line-of-sight path, and only a few in-building reflections can be detected in higher frequency bands. Based on the joint analysis of channel measurement and modeling results, several mmWave network design and in-building coverage enhancement insights are presented.

为了为室内用户进行经济高效的毫米波（mmWave）无线网络部署，基于现场测量研究的室内到室内（I2I）和室外到室内（O2I）覆盖范围的预测非常受关注下一代移动通信系统。首先，执行I2I和O2I方案中的测量，这些测量在实现不同mmWave频带和带宽上的信道特性的公平比较方面具有优势。接下来，发现具有断点距离的已开发双斜率路径损耗模型可以很好地拟合全向和定向测得的I2I数据，尤其是在39.5 GHz时，揭示了从亮或暗区域到完全阻塞区域的过渡是突然的。结合时空传播特性，研究了室内障碍物对路径损耗和角展度的影响，这对于光束转向和跟踪算法的设计至关重要。双向测量结果表明，大多数主要路径都沿着视线路径到达，并且在较高的频带中只能检测到少量建筑物内反射。基于信道测量和建模结果的联合分析，提出了几种mmWave网络设计和室内覆盖增强见解。