Open AccessInvestigation of Open‐Loop Transmit Power Control Parameters for Homogeneous and Heterogeneous Small‐Cell Uplinks
Author(s) -
Haider Amir,
Sinha Rashmi Sharan,
Hwang SeungHoon
Publication year - 2018
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.2017-0191
Subject(s) - transmitter power output , homogeneous , power control , power (physics) , computer science , loop (graph theory) , electronic engineering , computer network , open loop controller , control (management) , small cell , telecommunications , topology (electrical circuits) , control theory (sociology) , electrical engineering , engineering , cellular network , transmitter , physics , closed loop , control engineering , mathematics , channel (broadcasting) , combinatorics , artificial intelligence , thermodynamics , quantum mechanics
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 eN odeB, 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 α small = 1 and P o‐small = –100 dB m in a homogenous small‐cell network. Further, the selections of α small = 1 and P o‐small = –100 dB m in the small cells and α macro = 0.8 and P o‐macro = –100 dB m in the macrocells seem to be suitable for heterogeneous network deployment.