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3 - NOMA-Based Ultra-dense Networks

from Part II - Physical Layer Design

Published online by Cambridge University Press:  12 October 2020

Edited by
Haijun Zhang ,
Jemin Lee ,
Tony Q. S. Quek  and
Chih-Lin I
Haijun Zhang
Affiliation:
University of Science and Technology Beijing
Jemin Lee
Affiliation:
Daegu Gyeongbuk Institute of Science and Technology, Korea
Tony Q. S. Quek
Affiliation:
Singapore University of Technology and Design
Chih-Lin I
Affiliation:
China Mobile Research Institute
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Summary

This chapter investigates the application non-orthogonal multiple access (NOMA) in heterogeneous ultra-dense networks (HUDNs).Particularly, we propose a unified NOMA framework first. Then the applications of the proposed unified NOMA framework in HUDNs will be discussed. With the fact that small cells are densely deployed and the non-orthogonality of resource sharing, the system suffers severe interference. In this chapter, we identify the key challenges in the unified NOMA enabled HUDNs, especially for user association and resource allocation. In addition, we carry out the related case studies for the proposed unified NOMA enabled HUDNs including the user association based on matching theory and resource allocation based on optimization techniques. Furthermore, some critical insights will be provided for the design of NOMA enabled HUDNs, which can promote network access capacity in the next generation of communication systems.

Keywords

non-orthogonal multiple accessultra dense networkssmall cellHetNetunified NOMAresource allocationuser associationmatching theorygrant-free
Type
Chapter
Information
Ultra-dense Networks
Principles and Applications
 , pp. 37 - 50
Publisher: Cambridge University Press
Print publication year: 2020

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