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 αsmall = 1 and Po-small = -100 dBm in a homogenous small-cell network. Further, the selections of αsmall = 1 and Po-small = -100 dBm in the small cells and αmacro = 0.8 and Po-macro = -100 dBm in the macrocells seem to be suitable for heterogeneous network deployment.
Original language | English |
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Pages (from-to) | 51-60 |
Number of pages | 10 |
Journal | ETRI Journal |
Volume | 40 |
Issue number | 1 |
DOIs | |
State | Published - 1 Feb 2018 |
Keywords
- 5G
- HetNet
- Interference
- Open-loop power control
- Small cell