标题： 5G毫米波网络中的混合波束成形：全栈视角 显示英文标题

标题： Hybrid Beamforming in 5G mmWave Networks: a Full-stack Perspective

摘要： 本文研究了在具有全栈TCP/IP流量和MAC调度的5G毫米波（mmWave）蜂窝网络中，混合波束成形（HBF）和多用户多输入多输出（MU-MIMO）的跨层挑战和性能。 尽管之前关于HBF和MU-MIMO的研究主要集中在满缓冲传输的链路级分析上，但本工作揭示了HBF技术与协议栈高层之间的相互作用。 为此，先前对mmWave蜂窝网络全栈仿真工作已通过引入MU-MIMO和HBF建模进行了扩展。 我们的结果揭示了网络层与物理层中HBF MU-MIMO性能之间的新关系。 特别是，可以通过空间复用多址接入（SDMA）在5G网络中提高吞吐量。 然而，为了实现这些优势，有必要考虑某些权衡以及全栈HBF解决方案的实现复杂性。 显示英文摘要

摘要： This paper studies the cross-layer challenges and performance of Hybrid Beamforming (HBF) and Multi-User Multiple-Input Multiple-Output (MU-MIMO) in 5G millimeter wave (mmWave) cellular networks with full-stack TCP/IP traffic and MAC scheduling. While previous research on HBF and MU-MIMO has focused on link-level analysis of full-buffer transmissions, this work reveals the interplay between HBF techniques and the higher layers of the protocol stack. To this aim, prior work on full stack simulation of mmWave cellular network has been extended by including the modeling of MU-MIMO and HBF. Our results reveal novel relations between the networking layers and the HBF MU-MIMO performance in the physical layer. Particularly, throughput can be increased in 5G networks by means of Spatial Division Multiple Access (SDMA). However, in order to achieve such benefits it is necessary to take into account certain trade-offs and the implementation complexity of a full-stack HBF solution.