HetNets With Range Expansion: Local Delay and Energy Efficiency Optimization

Dong, Xiaojie, Zheng, Fu-Chun, Zhu, Xu ORCID: 0000-0002-7371-4595 and Luo, Jingjing
(2019) HetNets With Range Expansion: Local Delay and Energy Efficiency Optimization. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 68 (6). pp. 6147-6150.

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In this paper, we explore the different per-user bandwidths available for each tier of heterogeneous networks (HetNets) and the corresponding downlink range expansion (RE, a key measure to boost small cell association). Based on the practical case of tier-specific path loss exponents, we derive the local delay of HetNets under the random discontinuous transmission scheme (DTX, employed to manage the interference and reduce energy consumption). Using such a new expression for local delay, we then analyze the corresponding energy efficiency (EE). These delay and EE expressions reveal that there exists an optimal value for both the RE bias factor and for the DTX mute probability. A closed-form optimum solution for the RE bias factor is also derived for the low-rate regime.

Item Type: Article
Uncontrolled Keywords: Range expansion, energy efficiency, local delay, random discontinuous transmission scheme, and heterogeneous networks
Depositing User: Symplectic Admin
Date Deposited: 15 Jul 2019 08:01
Last Modified: 19 Jan 2023 00:37
DOI: 10.1109/TVT.2019.2907519
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3049709