论文标题
与合作NOMA的密集异质网络的覆盖范围分析
Coverage Analysis for Dense Heterogeneous Networks with Cooperative NOMA
论文作者
论文摘要
在异质的细胞网络（HETNET）中，由$ m $ s级密集的基础站（BSS）组成，认为与多个用户相关联的HETNET中的每个BSS都可以同时安排并在下降链路中使用（Power-Domain）非元素多访问（NOMALE offer-ORTOR-ORTOR-ORTORZONAL MOUSPES）在下链路链路中为两个用户提供服务。本文旨在使用\ textIt {nontocoperative}和提议的\ textit {Cooperative} NOMA方案进行初步研究。首先，我们研究了NOMA使用者对非合作性NOMA方案的覆盖率概率，在该方案中，没有BSS协调以共同传输特定细胞的NOMA信号，并得出每个层中BSS的两个NOMA使用者的覆盖率。我们表明，如果为NOMA用户分配的发送功率对某些约束不满意，则可以大大降低覆盖率概率。接下来，我们研究并得出了提议的合作NOMA方案的覆盖概率，在该方案中，没有任何用户标记的空隙BSS协调以增强特定单元格中的远处Noma用户。我们的分析表明，只要对NOMA使用者的传输权力得到适当分配，合作NOMA可以显着提高所有NOMA使用者的覆盖范围。
In a heterogeneous cellular network (HetNet) consisting of $M$ tiers of densely-deployed base stations (BSs), consider that each of the BSs in the HetNet that are associated with multiple users is able to simultaneously schedule and serve two users in a downlink time slot by performing the (power-domain) non-orthogonal multiple access (NOMA) scheme. This paper aims at the preliminary study on the downlink coverage performance of the HetNet with the \textit{non-cooperative} and the proposed \textit{cooperative} NOMA schemes. First, we study the coverage probability of the NOMA users for the non-cooperative NOMA scheme in which no BSs are coordinated to jointly transmit the NOMA signals for a particular cell and the coverage probabilities of the two NOMA users of the BSs in each tier are derived. We show that the coverage probabilities can be largely reduced if allocated transmit powers for the NOMA users are not satisfied with some constraints. Next, we study and derive the coverage probabilities for the proposed cooperative NOMA scheme in which the void BSs that are not tagged by any users are coordinated to enhance the far NOMA user in a particular cell. Our analyses show that cooperative NOMA can significantly improve the coverage of all NOMA users as long as the transmit powers for the NOMA users are properly allocated.
