Paper Info
Title
Energy-Efficient Transmit Power Control for Multi-Tier MIMO HetNets
Abstract
In this paper, we study energy-efficient transmit power control for multi-tier multi-antenna (MIMO) heterogeneous cellular networks (HetNets), where each tier operates in closed access policy and base stations (BSs) in each tier are distributed as a stationary Poisson point process (PPP). Each BS serves multiple users at a fixed distance away from it. We first study non-cooperative energy-efficient power control, where each tier selfishly chooses its transmit power to maximize its network energy efficiency (EE). This is modeled by a noncooperative power control game. We prove the existence and the uniqueness of the Nash equilibrium of the game. Also, we analyze the effects of circuit powers and BS densities of the tiers on their transmit powers at the Nash equilibrium. Then, we investigate cooperative energy-efficient power control, where all the tiers cooperatively choose their transmit powers to optimize their network EEs. This cooperative power control is formulated as a multi-objective problem. To obtain Paretooptimal solutions of the problem, we develop an algorithm that alternately updates the transmit powers of the tiers. In addition to the transmit power, the circuit power consumption of the operating BSs and their active antennas affects the network EE. Due to the circuit power, activating all the BSs and turning on all the antennas may not be optimal in maximizing the network EE. Motivated by this observation, we also develop energyefficient BS activation control and antenna activation control schemes. Finally, we extend the analysis to the highest signalto- interference-plus-noise ratio (SINR) association, where each user connects to the BS that offers the highest SINR among the BSs in its tier. Simulation results show that the proposed energy-efficient designs significantly improve the network EE at the cost of small spectral efficiency loss compared with the spectral-efficient designs.
Year
DOI
Venue
2015
10.1109/JSAC.2015.2435311
IEEE Journal on Selected Areas in Communications
Keywords
Field
DocType
energy efficiency,game theory,heterogeneous cellular network,stochastic geometry,games,antennas,nash equilibrium,interference,power control,signal to noise ratio
Base station,Transmitter power output,Efficient energy use,Computer science,Power control,MIMO,Computer network,Spectral efficiency,Cellular network,Nash equilibrium
Journal
Volume
Issue
ISSN
PP
99
0733-8716
Citations 
PageRank 
References 
10
0.43
31
Authors
3
Name
Order
Citations
PageRank
Younggap Kwon1284.11
Taewon Hwang239931.78
Xudong Wang31321109.09