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Energy-Efficient Short Packet Communications for Uplink NOMA-Based Massive MTC Networks

Han, Shujun and Xu, Xiaodong and Liu, Zilong and Xiao, Pei and Moessner, Klaus and Tao, Xiaofeng and Zhang, Ping (2019) 'Energy-Efficient Short Packet Communications for Uplink NOMA-Based Massive MTC Networks.' IEEE Transactions on Vehicular Technology, 68 (12). pp. 12066-12078. ISSN 0018-9545

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Abstract

The 5th-generation (5G) mobile networks and beyond need to support massive machine-type communications (MTC) devices with limited available radio resources. In this paper, we study the power-domain non-orthogonal multiple access (NOMA) technology to support energy-efficient massive MTC networks, where MTC devices exchange information using sporadic and low-rate short packets. We investigate the subchannel allocation and power control policy to maximize the achievable effective energy efficiency (EE) for uplink NOMA-based massive MTC networks, taking into account of short-packet communication characteristics. We model the subchannel allocation problem as a multi-agent Markov decision process and propose an efficient Q-learning algorithm to solve it. Furthermore, we obtain the optimal transmission power policy by approximating the achievable effective rate of uplink NOMA-based short packet communications. Compared with the existing OFDMA scheme, simulations validate that the proposed scheme can improve the achievable effective EE of massive MTC networks with 5.93%.

Item Type: Article
Uncontrolled Keywords: Massive MTC; NOMA; short packet communication; energy efficiency; joint subchannel and power allocation
Divisions: Faculty of Science and Health
Faculty of Science and Health > Computer Science and Electronic Engineering, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 15 Nov 2021 15:12
Last Modified: 15 Jan 2022 01:38
URI: http://repository.essex.ac.uk/id/eprint/31243

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