User Association and Resource Allocation in Unified NOMA Enabled Heterogeneous Ultra Dense Networks

被引：89
|
作者：
Qin, Zhijin [1 ]
Yue, Xinwei [2 ]
Liu, Yuanwei [3 ]
Ding, Zhiguo [5 ]
Nallanathan, Arumugam [4 ]
机构：
[1] Univ Lancaster, Lancaster, England
[2] Beihang Univ, Beijing, Peoples R China
[3] Queen Mary Univ, London, England
[4] Queen Mary Univ, Wireless Commun, London, England
[5] Univ Manchester, Manchester, Lancs, England
来源：
IEEE COMMUNICATIONS MAGAZINE | 2018年 / 56卷 / 06期
基金：
英国工程与自然科学研究理事会;
关键词：
NONORTHOGONAL MULTIPLE-ACCESS;
D O I：
10.1109/MCOM.2018.1700497
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Heterogeneous ultra dense networks (HUDNs) and non-orthogonal multiple access (NOMA) have been identified as two proposing techniques for 5G mobile communication systems due to their great capabilities to enhance spectrum efficiency. This article investigates the application of NOMA techniques in HUDNs to support massive connectivity in 5G systems. In particular, a unified NOMA framework is proposed, including power-domain NOMA and code-domain NOMA, which can be configured flexibly to serve different application scenarios. As a further advance, unified NOMA framework enabled HUDNs are further investigated, with particular focus on user association and resource allocation. Two case studies are provided for demonstrating the effectiveness of unified NOMA enabled HUDNs. Finally, some main challenges and promising research directions in NOMA enabled HUDNs are identified.
引用
收藏
页码：86 / 92
页数：7
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