Millimeter wave (mmWave) bands are considered a powerful key enabler for next generation (5G) mobile networks by providing multi-Gbps data rates. However, their severe pathloss and sensitivity to blockage present challenges in practical implementation. One effective way to mitigate these effects and to increase communication range is beamforming in combination with relaying. In this paper, we focus on two typical mmWave relay networks and for each network, we propose three beam scheduling methods to approach the network information theoretic capacity. The proposed beam scheduling methods include the deterministic horizontal continuous edge coloring (HC-EC) scheduler, the adaptive back pressure (BP) scheduler and the adaptive low-delay new back pressure (newBP) scheduler. With the aid of computer simulations, we show that within the network capacity range, the proposed schedulers provide good guarantees for the network stability, meanwhile achieve very low packet end-to-end delay.

中文翻译：

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用于半双工毫米波中继网络的队列感知波束调度

毫米波 (mmWave) 频段通过提供多 Gbps 数据速率被认为是下一代 (5G) 移动网络的强大关键推动因素。然而，它们严重的路径损耗和对阻塞的敏感性在实际实施中提出了挑战。减轻这些影响并增加通信范围的一种有效方法是与中继相结合的波束成形。在本文中，我们关注两个典型的毫米波中继网络，对于每个网络，我们提出了三种波束调度方法来接近网络信息理论容量。所提出的波束调度方法包括确定性水平连续边缘着色（HC-EC）调度器、自适应背压（BP）调度器和自适应低延迟新背压（newBP）调度器。借助计算机模拟，