Generalized User Grouping in NOMA Based on Overlapping Coalition Formation Game

Weichao Chen; Shengjie Zhao; Rongqing Zhang; Liuqing Yang

doi:10.1109/jsac.2020.3018832

Generalized User Grouping in NOMA Based on Overlapping Coalition Formation Game

Weichao Chen, Shengjie Zhao, Rongqing Zhang, Liuqing Yang

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Non-orthogonal multiple access (NOMA) is regarded as a promising technology to provide high spectral efficiency and support massive connectivity in 5G systems. In most existing NOMA user grouping approaches, users are grouped into disjoint groups, which may lead to a waste of power resources within each NOMA group. Motivated by this, in this paper we propose a novel generalized user grouping (GuG) concept for NOMA from an overlapping perspective, which allows each user to participate in multiple groups but subject to individual maximum power constraint. In order to achieve effective GuG and maximize the system sum rate, we formulate a joint power control and GuG optimization problem. Then, we address this problem by exploiting the overlapping coalition formation (OCF) game framework, and we further propose an OCF-based algorithm in which each user can be self-organized into a desirable overlapping coalition structure. Simulation results verify the efficiency of GuG in NOMA systems and indicate that compared with traditional NOMA user grouping schemes, our proposed OCF-based GuG NOMA scheme achieves significant performance gains in terms of system sum rate.

Original language	English (US)
Article number	9177257
Pages (from-to)	969-981
Number of pages	13
Journal	IEEE Journal on Selected Areas in Communications
Volume	39
Issue number	4
DOIs	https://doi.org/10.1109/jsac.2020.3018832
State	Published - Apr 1 2021

Bibliographical note

Funding Information:
This work was supported in part by the National Key Research and Development Project under Grant 2019YFB2102300 and Grant 2019YFB2102301, in part by the National Natural Science Foundation of China under Grant 61936014 and Grant 61901302, in part by the Scientific Research Project of Shanghai Science and Technology Committee under Grant 19511103302, in part by the Fundamental Research Funds for the Central Universities, in part by the National Science Foundation under Grant CPS-1932413 and Grant ECCS-1935915, and in part by the Natural Science Foundation of Shanghai under Grant 20ZR1462400. (Corresponding authors: Shengjie Zhao; Rongqing Zhang.)

Publisher Copyright:
© 1983-2012 IEEE.

Keywords

NOMA
coalition formation
generalized user grouping
overlapping
power control

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10.1109/jsac.2020.3018832

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abstract = "Non-orthogonal multiple access (NOMA) is regarded as a promising technology to provide high spectral efficiency and support massive connectivity in 5G systems. In most existing NOMA user grouping approaches, users are grouped into disjoint groups, which may lead to a waste of power resources within each NOMA group. Motivated by this, in this paper we propose a novel generalized user grouping (GuG) concept for NOMA from an overlapping perspective, which allows each user to participate in multiple groups but subject to individual maximum power constraint. In order to achieve effective GuG and maximize the system sum rate, we formulate a joint power control and GuG optimization problem. Then, we address this problem by exploiting the overlapping coalition formation (OCF) game framework, and we further propose an OCF-based algorithm in which each user can be self-organized into a desirable overlapping coalition structure. Simulation results verify the efficiency of GuG in NOMA systems and indicate that compared with traditional NOMA user grouping schemes, our proposed OCF-based GuG NOMA scheme achieves significant performance gains in terms of system sum rate.",

keywords = "NOMA, coalition formation, generalized user grouping, overlapping, power control",

author = "Weichao Chen and Shengjie Zhao and Rongqing Zhang and Liuqing Yang",

note = "Funding Information: This work was supported in part by the National Key Research and Development Project under Grant 2019YFB2102300 and Grant 2019YFB2102301, in part by the National Natural Science Foundation of China under Grant 61936014 and Grant 61901302, in part by the Scientific Research Project of Shanghai Science and Technology Committee under Grant 19511103302, in part by the Fundamental Research Funds for the Central Universities, in part by the National Science Foundation under Grant CPS-1932413 and Grant ECCS-1935915, and in part by the Natural Science Foundation of Shanghai under Grant 20ZR1462400. (Corresponding authors: Shengjie Zhao; Rongqing Zhang.) Publisher Copyright: {\textcopyright} 1983-2012 IEEE.",

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N2 - Non-orthogonal multiple access (NOMA) is regarded as a promising technology to provide high spectral efficiency and support massive connectivity in 5G systems. In most existing NOMA user grouping approaches, users are grouped into disjoint groups, which may lead to a waste of power resources within each NOMA group. Motivated by this, in this paper we propose a novel generalized user grouping (GuG) concept for NOMA from an overlapping perspective, which allows each user to participate in multiple groups but subject to individual maximum power constraint. In order to achieve effective GuG and maximize the system sum rate, we formulate a joint power control and GuG optimization problem. Then, we address this problem by exploiting the overlapping coalition formation (OCF) game framework, and we further propose an OCF-based algorithm in which each user can be self-organized into a desirable overlapping coalition structure. Simulation results verify the efficiency of GuG in NOMA systems and indicate that compared with traditional NOMA user grouping schemes, our proposed OCF-based GuG NOMA scheme achieves significant performance gains in terms of system sum rate.

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Generalized User Grouping in NOMA Based on Overlapping Coalition Formation Game

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