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User Association and Power Control for Energy Efficiency Maximization in M2M-Enabled Uplink Heterogeneous Networks with NOMA.

Authors
  • Zhang, Shuang1, 2
  • Kang, Guixia1, 2
  • 1 Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China. , (China)
  • 2 Wuxi BUPT Sensory Technology and Industry Institute CO. LTD, Wuxi 214000, China. , (China)
Type
Published Article
Journal
Sensors
Publisher
MDPI AG
Publication Date
Dec 02, 2019
Volume
19
Issue
23
Identifiers
DOI: 10.3390/s19235307
PMID: 31810276
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

To support a vast number of devices with less energy consumption, we propose a new user association and power control scheme for machine to machine enabled heterogeneous networks with non-orthogonal multiple access (NOMA), where a mobile user (MU) acting as a machine-type communication gateway can decode and forward both the information of machine-type communication devices and its own data to the base station (BS) directly. MU association and power control are jointly considered in the formulated as optimization problem for energy efficiency (EE) maximization under the constraints of minimum data rate requirements of MUs. A many-to-one MU association matching algorithm is firstly proposed based on the theory of matching game. By taking swap matching operations among MUs, BSs, and sub-channels, the original problem can be solved by dealing with the EE maximization for each sub-channel. Then, two power control algorithms are proposed, where the tools of sequential optimization, fractional programming, and exhaustive search have been employed. Simulation results are provided to demonstrate the optimality properties of our algorithms under different parameter settings.

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