Many mission-critical and latency-sensitive applications require ultra-reliable and low-latency communications (URLLC), which has been listed as a new service category of 5G New Radio (NR). To guarantee stringent latency and reliability constraints, URLLC services always exclusively occupy the spectrum and have priority over enhanced mobile broadband (eMBB) communications in the current coexistence scenario, which will greatly affect the performance of eMBB services and degrade the utilization efficiency of the spectrum resource. On the other hand, millimeter-wave (mmWave) communications can fulfill the enormous throughput requirements of 5G cellular communications. In this paper, we introduce mmWave communications into URLLC systems to provide a more efficient coexistence for eMBB and URLLC. A novel mmWave URLLC system is first developed, where URLLC users are allowed to share the spectrum resources with eMBB users. Besides, multi-connectivity technology, which enables users to access multiple base stations simultaneously, is introduced to the mmWave URLLC system to enhance the reliability. Then, a resource management problem is formulated, which maximizes the throughput of eMBB users while guaranteeing the latency and reliability requirements of URLLC users. To obtain optimal solutions, we first divide it into three subproblems, i.e., power allocation, resource matching, and user paring, and then solve them respectively. Simulation results demonstrate the data rate improvement compared against the traditional coexistence scenario without reusing strategy. Moreover, the multi-connectivity functionality poses a great effect on guaranteeing the latency and reliability requirements for URLLC users.

中文翻译：

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毫米波超可靠和低延迟通信的资源管理

许多关键任务和对延迟敏感的应用程序都需要超可靠和低延迟的通信（URLLC），URLLC已被列为5G新无线电（NR）的新服务类别。为了保证严格的延迟和可靠性约束，URLLC服务始终独占频谱，并在当前共存场景中优先于增强型移动宽带（eMBB）通信，这将极大地影响eMBB服务的性能并降低频谱资源的利用效率。另一方面，毫米波（mmWave）通信可以满足5G蜂窝通信的巨大吞吐量要求。在本文中，我们将mmWave通信引入URLLC系统，以便为eMBB和URLLC提供更有效的共存。首先开发了新颖的mmWave URLLC系统，允许URLLC用户与eMBB用户共享频谱资源。此外，mmWave URLLC系统还引入了使用户能够同时访问多个基站的多连接技术，以提高可靠性。然后，提出了一个资源管理问题，该问题可以在确保URLLC用户的延迟和可靠性要求的同时最大化eMBB用户的吞吐量。为了获得最佳解决方案，我们首先将其分为三个子问题，即功率分配，资源匹配和用户配对，然后分别解决。仿真结果表明，与传统的共存方案相比，在不重用策略的情况下，数据速率有所提高。而且，