TY - GEN
T1 - QoS driven energy-efficient design for downlink OFDMA networks
AU - Xiong, Cong
AU - Li, Geoffrey Ye
AU - Liu, Yalin
AU - Xu, Shugong
PY - 2012
Y1 - 2012
N2 - The ubiquitous applications of high-data-rate realtime wireless services have promptly boomed energy consumption in wireless networks. Therefore, energy-efficient design in wireless networks is very important and is attracting more and more research attention. In this paper, we study the quality-of-service (QoS) driven energy-efficient design in the downlink orthogonal frequency division multiple access (OFDMA) network. By integrating information theory with the concept of effective capacity, we formulate an energy efficiency (EE) optimization problem with statistical QoS provisioning. To solve the problem, we first modify it with a tight upper bound on the original EE and solve the modified problem. Then, we demonstrate that the resultant solution is quite close to the true optimal value when the number of subcarriers is large than that of the users. We also find out the tradeoff relation between EE and delay. Numerical results show that the proposed energy-efficient design scheme greatly improves EE whiling maintaining QoS requirements.
AB - The ubiquitous applications of high-data-rate realtime wireless services have promptly boomed energy consumption in wireless networks. Therefore, energy-efficient design in wireless networks is very important and is attracting more and more research attention. In this paper, we study the quality-of-service (QoS) driven energy-efficient design in the downlink orthogonal frequency division multiple access (OFDMA) network. By integrating information theory with the concept of effective capacity, we formulate an energy efficiency (EE) optimization problem with statistical QoS provisioning. To solve the problem, we first modify it with a tight upper bound on the original EE and solve the modified problem. Then, we demonstrate that the resultant solution is quite close to the true optimal value when the number of subcarriers is large than that of the users. We also find out the tradeoff relation between EE and delay. Numerical results show that the proposed energy-efficient design scheme greatly improves EE whiling maintaining QoS requirements.
KW - Energy efficiency (EE)
KW - orthogonal frequency division multiple access (OFDMA)
KW - spectral efficiency (SE)
UR - http://www.scopus.com/inward/record.url?scp=84877672466&partnerID=8YFLogxK
U2 - 10.1109/GLOCOM.2012.6503797
DO - 10.1109/GLOCOM.2012.6503797
M3 - Conference Proceeding
AN - SCOPUS:84877672466
SN - 9781467309219
T3 - Proceedings - IEEE Global Communications Conference, GLOBECOM
SP - 4320
EP - 4325
BT - 2012 IEEE Global Communications Conference, GLOBECOM 2012
T2 - 2012 IEEE Global Communications Conference, GLOBECOM 2012
Y2 - 3 December 2012 through 7 December 2012
ER -