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http://dx.doi.org/10.4218/etrij.2017-0191

Investigation of Open-Loop Transmit Power Control Parameters for Homogeneous and Heterogeneous Small-Cell Uplinks  

Haider, Amir (Division of Electronics and Electrical Engineering, Dongguk University)
Sinha, Rashmi Sharan (Division of Electronics and Electrical Engineering, Dongguk University)
Hwang, Seung-Hoon (Division of Electronics and Electrical Engineering, Dongguk University)
Publication Information
ETRI Journal / v.40, no.1, 2018 , pp. 51-60 More about this Journal
Abstract
In Long Term Evolution (LTE) cellular networks, the transmit power control (TPC) mechanism consists of two parts: the open loop (OL) and closed loop. Most cellular networks consider OL/TPC because of its simple implementation and low operation cost. The analysis of OL/TPC parameters is essential for efficient resource management from the cellular operator's viewpoint. In this work, the impact of the OL/TPC parameters is investigated for homogeneous small cells and heterogeneous small-cell/macrocell network environments. A mathematical model is derived to compute the transmit power at the user equipment, the received power at the eNodeB, the interference in the network, and the received signal-to-interference ratio. Using the analytical platform, the effects of the OL/TPC parameters on the system performance in LTE networks are investigated. Numerical results show that, in order to achieve the best performance, it is appropriate to choose ${\alpha}_{small}=1$ and $P_{o-small}=-100dBm$ in a homogenous small-cell network. Further, the selections of ${\alpha}_{small}=1$ and $P_{o-small}=-100dBm$ in the small cells and ${\alpha}_{macro}=0.8$ and $P_{o-macro}=-100dBm$ in the macrocells seem to be suitable for heterogeneous network deployment.
Keywords
5G; HetNet; Interference; Open-loop power control; Small cell;
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