解耦级联多层异构网络OMA与NOMA方案及性能比较

Decoupling Cascaded Multilevel HetNet OMA and NOMA Schemes and Performance Comparison

异构网络中上行链路(UL)和下行链路(DL)存在不平衡问题,在研究集双连接(DC)和解耦UL及DL级联(DUDA)为一体的多层异构网(HetNet)基础上,提出一种DUDA-DC的非正交多接入(NOMA)方案。NOMA总带宽由主链路和从链路共享,接收机采用连续干扰消除技术分离信号,将网络中对象建模为泊松点过程,借助随机几何数学工具,得出解耦级联多层HetNet中OMA和NOMA的覆盖概率和遍历速率,并给出数学解析表达式。仿真结果表明,与OMA方案相比,NOMA方案可有效改善网络性能。

To address the imbalance problem of Uplink(UL)and Downlink(DL)in Heterogeneous Network(HetNet),we study a multilevel HetNet which combines Dual-Connectivity(DC),Decoupled UL and DL Association(DUDA),and propose a DUDA-DC Non-Orthogonal Multiple Access(NOMA)scheme.In this study,the total bandwidth is shared by the primary links and secondary links,and the receiver uses continuous interference elimination technology to separate the signals.First,with the help of the random geometry math toll,the object in the network is modeled as a Poisson Point Process(PPP).Then we study the coverage probability and traversal rate of Orthogonal Multiple Access(OMA)and Non-Orthogonal Multiple Access(NOMA)in the decoupled association multi-tier HetNet,and finally get the mathematical analytical expression.Simulation results show that compared with the OMA scheme,the NOMA scheme can effectively improve the network performance.