TY - GEN
T1 - Maximizing energy efficiency in wireless networks with a minimum average throughput requirement
AU - Li, Chang
AU - Song, S. H.
AU - Zhang, Jun
AU - Letaief, K. B.
PY - 2012/8/1
Y1 - 2012/8/1
N2 - Given the growing concern over energy consumption and associated global warming, green communication is becoming more and more important. Lots of efforts have been put into investigating energy efficiency based design in wireless systems. Unfortunately, the maximum energy efficiency of a point-to-point link is normally achieved when the transmit power approaches zero, which, however, is not desirable in practical systems due to the low achievable data rate. In this paper, we consider the energy efficiency optimization with a practical power consumption model, where, besides a maximum transmit power constraint, we set a rate constraint (r 0) to guarantee an average throughput requirement (R th). Due to the possible outage in transmission, r 0 is in general different from R th, and determining r 0 for a given R th is not trivial. We shall derive a closed-form solution for the optimal transmit power that maximizes energy efficiency. We will also demonstrate that a carefully selected rate constraint r 0 can guarantee the required average throughput R th and provide the freedom to achieve different tradeoffs between energy efficiency and average throughput.
AB - Given the growing concern over energy consumption and associated global warming, green communication is becoming more and more important. Lots of efforts have been put into investigating energy efficiency based design in wireless systems. Unfortunately, the maximum energy efficiency of a point-to-point link is normally achieved when the transmit power approaches zero, which, however, is not desirable in practical systems due to the low achievable data rate. In this paper, we consider the energy efficiency optimization with a practical power consumption model, where, besides a maximum transmit power constraint, we set a rate constraint (r 0) to guarantee an average throughput requirement (R th). Due to the possible outage in transmission, r 0 is in general different from R th, and determining r 0 for a given R th is not trivial. We shall derive a closed-form solution for the optimal transmit power that maximizes energy efficiency. We will also demonstrate that a carefully selected rate constraint r 0 can guarantee the required average throughput R th and provide the freedom to achieve different tradeoffs between energy efficiency and average throughput.
KW - energy efficiency
KW - Green communications
KW - power model
UR - http://www.scopus.com/inward/record.url?scp=84864360766&partnerID=8YFLogxK
U2 - 10.1109/WCNC.2012.6213945
DO - 10.1109/WCNC.2012.6213945
M3 - Conference article published in proceeding or book
AN - SCOPUS:84864360766
SN - 9781467304375
T3 - IEEE Wireless Communications and Networking Conference, WCNC
SP - 1130
EP - 1134
BT - 2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
T2 - 2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
Y2 - 1 April 2012 through 4 April 2012
ER -
