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Open AccessFeature PaperArticle

Maximum Transmit Power for UE in an LTE Small Cell Uplink

Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Korea
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Electronics 2019, 8(7), 796; https://doi.org/10.3390/electronics8070796
Received: 19 May 2019 / Revised: 11 July 2019 / Accepted: 15 July 2019 / Published: 16 July 2019
(This article belongs to the Special Issue Recent Technical Developments in Energy-Efficient 5G Mobile Cells)
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Abstract

To furnish the network with small cells, it is vital to consider parameters like cell size, interference in the network, and deployment strategies to maximize the network’s performance gains expected from small cells. With a small cell network, it is critical to analyze the impact of the uplink power control parameters on the network’s performance. In particular, the maximum transmit power (Pmax) for user equipment (UE) needs to be revisited for small cells, since it is a major contributor towards interference. In this work, the network performance was evaluated for different Pmax values for the small cell uplink. Various deployment scenarios for furnishing the existing macro layer in LTE networks with small cells were considered. The Pmax limit for a small cell uplink was evaluated for both homogenous small cell and heterogeneous networks (HetNet). The numerical results showed that it would be appropriate to adopt Pmax = 18 dBm in uniformly distributed small cells rather than Pmax = 23 dBm, as in macro environments. The choice of Pmax = 18 dBm was further validated for three HetNet deployment scenarios. A decrease of 0.52 dBm and an increase of 0.03 dBm and 3.29 dBm in the proposed Pmax = 18 dBm were observed for the three HetNet deployments, respectively. Furthermore, we propose that the fractional power control mode can be employed instead of the full compensation mode in small cell uplinks. View Full-Text
Keywords: small cell; maximum transmit power; UE; open-loop power control; interference small cell; maximum transmit power; UE; open-loop power control; interference
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Haider, A.; Hwang, S.-H. Maximum Transmit Power for UE in an LTE Small Cell Uplink. Electronics 2019, 8, 796.

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