INTEGRATED MILLIMETER WAVE AND SUB-6 GHZ WIRELESS NETWORKS: A ROADMAP FOR JOINT MOBILE BROADBAND AND ULTRA-RELIABLE LOW-LATENCY COMMUNICATIONS
INTEGRATED MILLIMETER WAVE AND SUB-6 GHZ WIRELESS NETWORKS: A ROADMAP FOR JOINT MOBILE BROADBAND AND ULTRA-RELIABLE LOW-LATENCY COMMUNICATIONS
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DOI：
10.1109/mwc.2019.1800039
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发表时间：
2019-04-01
影响因子：
12.9
通讯作者：
Debbah, Merouane
中科院分区：
文献类型：
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作者：
Semiari, Omid;Saad, Walid;Debbah, Merouane
下一代无线网络必须通过涵盖增强型移动宽带（eMBB）和超高可靠低延迟通信（URLLC）的多种无线服务，使增强现实和联网自动驾驶汽车等新兴技术成为可能。现有的仅依赖稀缺的6GHz以下微瓦频段的无线系统，由于频谱稀缺，将无法满足未来无线服务如此严格且多样的服务要求。同时，在高频毫米波频段运行被视为一种有吸引力的解决方案，这主要是因为其带宽可用性以及大规模多天线通信的可能性。然而，尽管利用毫米波频率的大带宽有可能提高eMBB服务的无线容量并减少低延迟应用的传输延迟，但毫米波通信由于易受阻塞、高路径损耗和信道不确定性的影响，本身是不可靠的。因此，为了提供URLLC和高速无线接入，理想的情况是将微瓦网络的可靠性与毫米波网络的高容量无缝集成。为此，本文介绍了首个关于毫米波 - 微瓦集成通信的综合教程。这种设想的集成设计将使无线网络能够通过利用两者的优势实现URLLC以及eMBB：微瓦频段的可靠长距离通信以及毫米波频率的定向高速通信。为了实现这一目标，讨论了关键的解决方案概念，包括无线接口的新架构、具有URLLC感知的帧结构和资源分配方法以及移动性管理，以实现毫米波 - 微瓦集成通信的潜力。讨论了每个提出方案的机遇和挑战，并给出了关键结果以展示所开发的毫米波 - 微瓦集成框架的优点。
Next-generation wireless networks must enable emerging technologies such as augmented reality and connected autonomous vehicles via a wide range of wireless services that span enhanced mobile broadband (eMBB) and ultra-reliable low-latency communication (URLLC). Existing wireless systems that solely rely on the scarce sub-6 GHz, mu W frequency bands will be unable to meet such stringent and mixed service requirements for future wireless services due to spectrum scarcity. Meanwhile, operating at high-frequency mmWave bands is seen as an attractive solution, primarily due to the bandwidth availability and possibility of large-scale multi-antenna communication. However, even though leveraging the large bandwidth at mmWave frequencies can potentially boost the wireless capacity for eMBB services and reduce the transmission delay for low-latency applications, mmWave communication is inherently unreliable due to its susceptibility to blockage, high path loss, and channel uncertainty. Hence, to provide URLLC and high-speed wireless access, it is desirable to seamlessly integrate the reliability of mW networks with the high capacity of mmWave networks. To this end, in this article, the first comprehensive tutorial for integrated mmWave-mW communications is introduced. This envisioned integrated design will enable wireless networks to achieve URLLC along with eMBB by leveraging the best of two worlds: reliable, long-range communications at the mW bands and directional high-speed communications at the mmWave frequencies. To achieve this goal, key solution concepts are discussed that include new architectures for the radio interface, URLLC-aware frame structure and resource allocation methods along with mobility management, to realize the potential of integrated mmWave-mW communications. The opportunities and challenges of each proposed scheme are discussed and key results are presented to show the merits of the developed integrated mmWave-mW framework.