Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
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TY - GEN
T1 - Energy-efficient power allocation for delay-constrained systems
AU - Musavian, Leila
AU - Tho Le-Ngoc, [No Value]
PY - 2012
Y1 - 2012
N2 - In this paper, we obtain an energy-efficient power allocation technique for a Rayleigh block-fading channel with delay-limited applications. In particular, we consider a probabilistic delay constraint as the user quality-of-service (QoS) requirement, and incorporate the concept of effective capacity to obtain the maximum arrival rate, at which, the delay constraint is satisfied. We obtain the energy efficiency (EE), which is formulated as the ratio between the effective capacity and the total expenditure power, of this system and derive the power allocation strategy that maximizes the EE. Numerical results are conducted to corroborate our theoretical results. In addition, for comparison reasons, we plot the maximum achievable EE under two well-known power allocations schemes, namely, water-filling (wf) and constant power allocation (cons) when considering delay constraints. The results show that in stringent delay limited systems, adaptive power allocation improves the maximum achievable EE significantly.
AB - In this paper, we obtain an energy-efficient power allocation technique for a Rayleigh block-fading channel with delay-limited applications. In particular, we consider a probabilistic delay constraint as the user quality-of-service (QoS) requirement, and incorporate the concept of effective capacity to obtain the maximum arrival rate, at which, the delay constraint is satisfied. We obtain the energy efficiency (EE), which is formulated as the ratio between the effective capacity and the total expenditure power, of this system and derive the power allocation strategy that maximizes the EE. Numerical results are conducted to corroborate our theoretical results. In addition, for comparison reasons, we plot the maximum achievable EE under two well-known power allocations schemes, namely, water-filling (wf) and constant power allocation (cons) when considering delay constraints. The results show that in stringent delay limited systems, adaptive power allocation improves the maximum achievable EE significantly.
KW - Cross-layer design
KW - energy efficiency
KW - delay constraint
KW - effective capacity
KW - FADING CHANNELS
KW - WIRELESS
KW - SERVICE
KW - QUALITY
KW - NETWORKS
KW - REGIME
U2 - 10.1109/GLOCOM.2012.6503666
DO - 10.1109/GLOCOM.2012.6503666
M3 - Conference contribution/Paper
SN - 9781467309202
T3 - IEEE Global Telecommunications Conference (Globecom)
SP - 3554
EP - 3559
BT - 2012 IEEE Global Communications Conference (GLOBECOM)
PB - IEEE
CY - New York
T2 - IEEE Global Communications Conference (GLOBECOM)
Y2 - 3 December 2012 through 7 December 2012
ER -