Coverage Analysis of Relay Assisted Millimeter Wave Cellular Networks with Spatial Correlation
Coverage Analysis of Relay Assisted Millimeter Wave Cellular Networks with Spatial Correlation
复制标题
DOI：
10.1109/wcnc45663.2020.9120776
复制
发表时间：
2019-12
期刊：
影响因子：
--
通讯作者：
Simin Xu;Nan Yang;Biaoshi He;H. Jafarkhani
中科院分区：
文献类型：
--
作者：
Simin Xu;Nan Yang;Biaoshi He;H. Jafarkhani
我们提出了一种新的分析框架来评估以空闲用户设备(UE)为中继站的毫米波(MmWave)蜂窝网络的覆盖性能。在该网络中，基站(BS)采用直接模式向目的地UE发送，或者如果直接模式失败则采用中继模式，其中BS向中继UE发送，然后中继UE向目的地UE发送。为了解决实际中目标UE的剧烈轮换问题，我们提出了在目标UE采用选择组合。推导了网络信干噪比(SINR)覆盖概率的新表达式。利用数值结果，我们首先证明了我们的新表达式的准确性。然后，我们证明了忽略空间相关性会导致对信干比覆盖概率的严重高估。此外，我们还表明，在毫米波蜂窝网络中引入中继极大地提高了覆盖性能。此外，我们还证明了利用我们的分析可以确定最大化信干比覆盖概率的最佳BS密度。
We propose a novel analytical framework for evaluating the coverage performance of a millimeter wave (mmWave) cellular network where idle user equipments (UEs) act as relays. In this network, the base station (BS) adopts either the direct mode to transmit to the destination UE, or the relay mode if the direct mode fails, where the BS transmits to the relay UE and then the relay UE transmits to the destination UE. To address the drastic rotational movements of destination UEs in practice, we propose to adopt selection combining at destination UEs. New expression is derived for the signal-to-interference-plus noise ratio (SINR) coverage probability of the network. Using numerical results, we first demonstrate the accuracy of our new expression. Then we show that ignoring spatial correlation, which has been commonly adopted in the literature, leads to severe overestimation of the SINR coverage probability. Furthermore, we show that introducing relays into a mmWave cellular network vastly improves the coverage performance. In addition, we show that the optimal BS density maximizing the SINR coverage probability can be determined by using our analysis.