DocumentCode :
2971938
Title :
The Effects of Cell Size on Energy Saving, System Capacity, and Per-Energy Capacity
Author :
Leem, Hansung ; Baek, Seon Yeob ; Sung, Dan Keun
Author_Institution :
Dept. of EE, KAIST, Daejeon, South Korea
fYear :
2010
fDate :
18-21 April 2010
Firstpage :
1
Lastpage :
6
Abstract :
Future mobile communication systems demand much higher data rates which may require significantly more energy consumption, compared with the current 3G systems. Recently, green radio has attracted worldwide attention. Energy efficiency is considered as a very important factor for designing future communication systems in this green radio environment because reducing energy consumption of base stations (BSs) and mobile stations (MSs) can directly contribute to reducing CO2 emission. We investigate the effects of cell size on energy saving and system capacity and then show the effectiveness of small-cell based future mobile communication systems in terms of energy efficiency. If the path-loss exponent increases and cell-radius ratio becomes smaller, the per-energy capacity ratio becomes larger. For example, if the path-loss exponent is 4 and the per-energy capacity of a macro-cell is normalized to 1, the per-energy capacities of a micro, pico-, and femto-cell are 16,104, and 108 in downlink and 64,106, and 1012 in uplink, respectively. The amount of CO2 emission of one BS transmitter is approximately 181[kg] in a year, if the cell radius is 1[km]. If the cell radius is 500[m], 100[m], and 10[m], the amount of CO2 emission in a year is reduced to 45.25[kg], 1.81[kg], and 18.1[g], respectively. Thus, small-cell based mobile communication systems can be a very effective solution to accommodate high data rates with low energy consumption in a future green radio environment.
Keywords :
3G mobile communication; energy consumption; 3G systems; energy consumption; green radio; mobile communication; mobile stations; per-energy capacity; 3G mobile communication; 4G mobile communication; Base stations; Communications Society; Downlink; Energy consumption; Energy efficiency; Mobile communication; Radio transmitters; Topology;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2010 IEEE
Conference_Location :
Sydney, NSW
ISSN :
1525-3511
Print_ISBN :
978-1-4244-6396-1
Type :
conf
DOI :
10.1109/WCNC.2010.5506411
Filename :
5506411
Link To Document :
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