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Computer Engineering ›› 2019, Vol. 45 ›› Issue (11): 97-101,106. doi: 10.19678/j.issn.1000-3428.0052851

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Decoupling Cascaded Multilevel HetNet OMA and NOMA Schemes and Performance Comparison

FAN Qiaoling1, JIA Xiangdong1,2, CHEN Yuwan1, XU Wenjuan1   

  1. 1. College of Computer Science and Engineering, Northwest Normal University, Lanzhou 730070, China;
    2. Wireless Communication Key Lab of Jiangsu Province, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • Received:2018-10-11 Revised:2018-12-07 Published:2018-12-14

解耦级联多层异构网络OMA与NOMA方案及性能比较

范巧玲1, 贾向东1,2, 陈玉宛1, 徐文娟1   

  1. 1. 西北师范大学 计算机科学与工程学院, 兰州 730070;
    2. 南京邮电大学 江苏省无线通信重点实验室, 南京 210003
  • 作者简介:范巧玲(1993-),女,硕士研究生,主研方向为无线通信;贾向东,教授、博士、博士后;陈玉宛、徐文娟,硕士研究生。
  • 基金资助:
    国家自然科学基金(61861039,61561043,61261015);甘肃省科技计划"无人机关键技术研究"(18YF1GA060);西北师范大学青年教师科研能力提升计划(创新团队项目)"下一代无线网络关键技术"。

Abstract: 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.

Key words: Heterogeneous Network(HetNet), Dual-Connectivity(DC), Non-Orthogonal Multiple Access(NOMA), Orthogonal Multiple Access(OMA), decoupling cascaded

摘要: 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。

关键词: 异构网络, 双连接, 非正交多接入, 正交多接入, 解耦级联

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