Joint Subcarrier Assignment and Global Energy-Efficient Power Allocation for Energy-Harvesting Two-Tier Downlink NOMA Hetnets
In this paper, the problem of joint subcarrier assignment and global energy-efficient power allocation (J-SA-GEE-PA) for energy-harvesting (EH) two-tier downlink non-orthogonal multiple-access (NOMA) heterogeneous networks (HetNets) is considered. Particularly, the HetNet consists of a macro base-st...
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| Format: | Article |
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IEEE
2019-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8894004/ |
| _version_ | 1818621988754685952 |
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| author | Mohammed W. Baidas Mubarak Al-Mubarak Emad Alsusa Mohamad Khattar Awad |
| author_facet | Mohammed W. Baidas Mubarak Al-Mubarak Emad Alsusa Mohamad Khattar Awad |
| author_sort | Mohammed W. Baidas |
| collection | DOAJ |
| description | In this paper, the problem of joint subcarrier assignment and global energy-efficient power allocation (J-SA-GEE-PA) for energy-harvesting (EH) two-tier downlink non-orthogonal multiple-access (NOMA) heterogeneous networks (HetNets) is considered. Particularly, the HetNet consists of a macro base-station (MBS) and a number of small base-stations (SBSs), which are solely powered via renewable-energy sources. The aim is to solve the J-SA-GEE-PA maximization problem subject to quality-of-service (QoS) per user as well as other practical constraints. However, the formulated J-SA-GEE-PA problem happens to be non-convex and NP-hard, and thus is computationally-prohibitive. In turn, problem J-SA-GEE-PA is split into two sub-problems: (1) subcarrier assignment via many-to-many matching, and (2) GEE-maximizing power allocation. In the first sub-problem, the subcarriers are assigned to users via the Gale-Shapley deferred acceptance mechanism. As for the second sub-problem, the GEE-PA problem is solved optimally via a low-complexity algorithm. After that, a two-stage solution procedure is devised to efficiently solve the J-SA-GEE-PA problem, while ensuring stability. Simulation results are presented to validate the proposed solution procedure, where it is shown to efficiently yield comparable network global energy-efficiency to the J-SA-GEE-PA scheme, and superior to that of OFDMA; however, with lower computational-complexity. The algorithmic designs presented in this work constitute a step towards filling the gap for computationally-efficient and effective resource allocation solutions to guarantee a fully autonomous and grid-independent operation of EH two-tier downlink NOMA HetNets. |
| first_indexed | 2024-12-16T18:18:01Z |
| format | Article |
| id | doaj.art-f553ee43915b41aa898376e2ecb85108 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-16T18:18:01Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-f553ee43915b41aa898376e2ecb851082022-12-21T22:21:38ZengIEEEIEEE Access2169-35362019-01-01716355616357710.1109/ACCESS.2019.29522938894004Joint Subcarrier Assignment and Global Energy-Efficient Power Allocation for Energy-Harvesting Two-Tier Downlink NOMA HetnetsMohammed W. Baidas0https://orcid.org/0000-0002-0536-3623Mubarak Al-Mubarak1https://orcid.org/0000-0002-8182-9296Emad Alsusa2https://orcid.org/0000-0002-7724-2636Mohamad Khattar Awad3https://orcid.org/0000-0003-2081-8160Department of Electrical Engineering, College of Engineering and Petroleum, Kuwait University, Kuwait City, KuwaitDepartment of Electrical and Computer Engineering, The Ohio State University, Columbus, OH, USASchool of Electrical and Electronic Engineering, The University of Manchester, Manchester, U.K.Department of Computer Engineering, College of Engineering and Petroleum, Kuwait University, Kuwait City, KuwaitIn this paper, the problem of joint subcarrier assignment and global energy-efficient power allocation (J-SA-GEE-PA) for energy-harvesting (EH) two-tier downlink non-orthogonal multiple-access (NOMA) heterogeneous networks (HetNets) is considered. Particularly, the HetNet consists of a macro base-station (MBS) and a number of small base-stations (SBSs), which are solely powered via renewable-energy sources. The aim is to solve the J-SA-GEE-PA maximization problem subject to quality-of-service (QoS) per user as well as other practical constraints. However, the formulated J-SA-GEE-PA problem happens to be non-convex and NP-hard, and thus is computationally-prohibitive. In turn, problem J-SA-GEE-PA is split into two sub-problems: (1) subcarrier assignment via many-to-many matching, and (2) GEE-maximizing power allocation. In the first sub-problem, the subcarriers are assigned to users via the Gale-Shapley deferred acceptance mechanism. As for the second sub-problem, the GEE-PA problem is solved optimally via a low-complexity algorithm. After that, a two-stage solution procedure is devised to efficiently solve the J-SA-GEE-PA problem, while ensuring stability. Simulation results are presented to validate the proposed solution procedure, where it is shown to efficiently yield comparable network global energy-efficiency to the J-SA-GEE-PA scheme, and superior to that of OFDMA; however, with lower computational-complexity. The algorithmic designs presented in this work constitute a step towards filling the gap for computationally-efficient and effective resource allocation solutions to guarantee a fully autonomous and grid-independent operation of EH two-tier downlink NOMA HetNets.https://ieeexplore.ieee.org/document/8894004/Energy-efficiencyheterogeneous networksmatchingnon-orthogonal multiple-accesspower allocationsubcarrier assignment |
| spellingShingle | Mohammed W. Baidas Mubarak Al-Mubarak Emad Alsusa Mohamad Khattar Awad Joint Subcarrier Assignment and Global Energy-Efficient Power Allocation for Energy-Harvesting Two-Tier Downlink NOMA Hetnets IEEE Access Energy-efficiency heterogeneous networks matching non-orthogonal multiple-access power allocation subcarrier assignment |
| title | Joint Subcarrier Assignment and Global Energy-Efficient Power Allocation for Energy-Harvesting Two-Tier Downlink NOMA Hetnets |
| title_full | Joint Subcarrier Assignment and Global Energy-Efficient Power Allocation for Energy-Harvesting Two-Tier Downlink NOMA Hetnets |
| title_fullStr | Joint Subcarrier Assignment and Global Energy-Efficient Power Allocation for Energy-Harvesting Two-Tier Downlink NOMA Hetnets |
| title_full_unstemmed | Joint Subcarrier Assignment and Global Energy-Efficient Power Allocation for Energy-Harvesting Two-Tier Downlink NOMA Hetnets |
| title_short | Joint Subcarrier Assignment and Global Energy-Efficient Power Allocation for Energy-Harvesting Two-Tier Downlink NOMA Hetnets |
| title_sort | joint subcarrier assignment and global energy efficient power allocation for energy harvesting two tier downlink noma hetnets |
| topic | Energy-efficiency heterogeneous networks matching non-orthogonal multiple-access power allocation subcarrier assignment |
| url | https://ieeexplore.ieee.org/document/8894004/ |
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