TY - GEN
T1 - QoS-driven energy-efficient power control with Markov arrivals and finite-alphabet inputs
AU - Ozcan, Gozde
AU - Ozmen, Mustafa
AU - Gursoy, M. Cenk
N1 - Funding Information:
This work was supported in part by National Science Foundation grants CNS-1443966 and EECS-1443994
PY - 2016/8/10
Y1 - 2016/8/10
N2 - This paper proposes optimal power adaptation schemes that maximize the energy efficiency (EE) in the presence of Markovian sources and finite-alphabet inputs subject to quality of service (QoS) constraints. First, maximum average arrival rates supported by transmitting signals with arbitrary input distributions are characterized in closed-form by employing the effective bandwidth of time-varying sources (e.g., discrete-time Markov and Markov fluid sources) and effective capacity of the time-varying wireless channel. Subsequently, EE is defined as the ratio of the maximum average arrival rate to the total power consumption, in which circuit power is also taken into account. Following these characterizations, an optimization problem is formulated to maximize the EE of the system, and optimal power control schemes are determined. Through numerical results, the performance of the optimal power control policies is evaluated for different signal constellations and is also compared with that of constant power transmission. The impact of QoS constraints, source characteristics, input distributions on the maximum achievable EE and the throughput is analyzed.
AB - This paper proposes optimal power adaptation schemes that maximize the energy efficiency (EE) in the presence of Markovian sources and finite-alphabet inputs subject to quality of service (QoS) constraints. First, maximum average arrival rates supported by transmitting signals with arbitrary input distributions are characterized in closed-form by employing the effective bandwidth of time-varying sources (e.g., discrete-time Markov and Markov fluid sources) and effective capacity of the time-varying wireless channel. Subsequently, EE is defined as the ratio of the maximum average arrival rate to the total power consumption, in which circuit power is also taken into account. Following these characterizations, an optimization problem is formulated to maximize the EE of the system, and optimal power control schemes are determined. Through numerical results, the performance of the optimal power control policies is evaluated for different signal constellations and is also compared with that of constant power transmission. The impact of QoS constraints, source characteristics, input distributions on the maximum achievable EE and the throughput is analyzed.
KW - Effective capacity
KW - MMSE
KW - QoS constraints
KW - energy efficiency
KW - fading channel
KW - mutual information
KW - optimal power control
UR - http://www.scopus.com/inward/record.url?scp=84985961691&partnerID=8YFLogxK
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U2 - 10.1109/ISIT.2016.7541803
DO - 10.1109/ISIT.2016.7541803
M3 - Conference contribution
AN - SCOPUS:84985961691
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 2769
EP - 2773
BT - Proceedings - ISIT 2016; 2016 IEEE International Symposium on Information Theory
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 IEEE International Symposium on Information Theory, ISIT 2016
Y2 - 10 July 2016 through 15 July 2016
ER -