DM-COM: Combining Device-to-Device and MU-MIMO Communications for Cellular Networks
DM-COM: Combining Device-to-Device and MU-MIMO Communications for Cellular Networks
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DOI：
10.1109/jiot.2021.3066502
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发表时间：
2021-09
影响因子：
10.6
通讯作者：
Pedram Kheirkhah Sangdeh;Hossein Pirayesh;Qiben Yan;Huacheng Zeng
中科院分区：
文献类型：
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作者：
Pedram Kheirkhah Sangdeh;Hossein Pirayesh;Qiben Yan;Huacheng Zeng
在蜂窝网络中，多源多输入多输出（MU-MIMO）是一项关键技术，并且已经部署在许多实际系统中。最近，设备对设备（D2D）通信已成为另一种有前途的技术，因为它具有多种优势，例如流量卸载，低延迟传输和增强的光谱效率。尽管这两种技术有很多结果，但其中大多数仅限于它们各自的领域，并且缺乏实践设计来结合两种蜂窝网络的技术。在本文中，我们提出了DM-COM，这是一个实用方案，用于促进蜂窝网络中D2D和MU-MIMO子系统的共存。 DM-COM的推动因素是一种管理两个子系统之间相互干扰的新方法，这不需要渠道状态信息，因此可以接受实际实施。我们已经在无线测试床上构建了DM-COM的原型，并在现实世界中的无线环境中评估了其性能。我们的实验结果表明，在小型蜂窝网络中使用DM-COM，D2D用户达到1.9位/s/hz光谱效率，而MU-MIMO用户与没有D2D用户的情况相比，使用MU-MIMO用户的吞吐量少于8％。
In cellular networks, multiuser multiple-input multiple-output (MU-MIMO) is a key technology and has already been deployed in many real systems. Recently, device-to-device (D2D) communication has emerged as another promising technology as it offers several advantages, such as traffic offloading, low-latency transmissions, and enhanced spectral efficiency. Although there are many results of these two technologies, most of them are limited to their respective domains and there is a lack of practical design to combine both technologies for cellular networks. In this article, we present DM-COM, a practical scheme for enabling the coexistence of D2D and MU-MIMO subsystems in cellular networks. The enabler of DM-COM is a new approach for managing the mutual interference between the two subsystems, which does not require channel state information and is, therefore, amenable to practical implementation. We have built a prototype of DM-COM on a wireless testbed and evaluated its performance in a real-world wireless environment. Our experimental results show that, using DM-COM in a small cellular network, D2D users achieve 1.9 bit/s/Hz spectral efficiency, while MU-MIMO users have less than 8% throughput degradation compared to the case without D2D users.