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Load Coupling and E...
Load Coupling and Energy Optimization in Multi-Cell and Multi-Carrier NOMA Networks
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- Lei, Lei (författare)
- Univ Luxembourg, Interdisciplinary Ctr Secur Reliabil & Trust, L-1855 Luxembourg, Luxembourg
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- You, Lei (författare)
- Uppsala universitet,Datalogi
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- Yang, Yang (författare)
- Fraunhofer ITWM, Competence Ctr High Performance Comp, D-69663 Kaiserslautern, Germany
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- Yuan, Di (författare)
- Uppsala universitet,Datalogi
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- Chatzinotas, Symeon (författare)
- Univ Luxembourg, Interdisciplinary Ctr Secur Reliabil & Trust, L-1855 Luxembourg, Luxembourg
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- Ottersten, Björn, 1961- (författare)
- Univ Luxembourg, Interdisciplinary Ctr Secur Reliabil & Trust, L-1855 Luxembourg, Luxembourg,Interdisciplinary Centre for Security, Reliability and Trust, University of Luxembourg, Luxembourg City, Luxembourg
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(creator_code:org_t)
- Institute of Electrical and Electronics Engineers (IEEE), 2019
- 2019
- Engelska.
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Ingår i: IEEE Transactions on Vehicular Technology. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9545 .- 1939-9359. ; 68:11, s. 11323-11337
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- In this paper, we investigate energy optimization in multi-cell and multi-carrier non-orthogonal multiple access (NOMA) networks. We apply a load-coupling model for NOMA networks to capture the coupling relation of mutual interference among cells. With this analytical tool, we formulate an energy minimization problem in a NOMA-based load-coupled system, where optimizing load-rate-power allocation, and determining decoding order and user grouping are the key aspects. Theoretically, we prove that the minimum consumed energy can be achieved by using all the time-frequency resources in each cell to deliver users' demand, and allowing all the users to share resource units. From a practical perspective, we consider three types of NOMA grouping schemes, i.e., all-user grouping, partitioned and non-partitioned grouping. We develop tailored solutions for each grouping scheme to enable efficient load-rate-power optimization. These three algorithmic components are embedded into a power-adjustment framework to provide energy-efficient solutions for NOMA networks. Numerical results demonstrate promising energy-saving gains of NOMA over orthogonal multiple access in large-scale cellular networks, in particular for high-demand and resource-limited scenarios. The results also show fast convergence of the proposed algorithms and demonstrate the effectiveness of the solutions.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Kommunikationssystem (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Communication Systems (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Nyckelord
- Non-orthogonal multiple access (NOMA)
- load coupling
- resource allocation
- energy minimization
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