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

Zhijin Qin, Xinwei Yue, Yuanwei Liu, Zhiguo Ding, Arumugam Nallanathan

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

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.

Original languageBritish English
Pages (from-to)86-96
Number of pages11
JournalIEEE Communications Magazine
Volume56
Issue number6
DOIs
StatePublished - Jun 2018

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