Stochastic analysis of energy savings with sleep mode in OFDMA wireless networks
Résumé
The issue of energy efficiency (EE) in Orthogonal Frequency-Division Multiple Access (OFDMA) wireless networks is discussed in this paper. Our interest is focused on the promising concept of base station (BS) sleep mode, introduced recently as a key feature in order to dramatically reduce network energy consumption. The proposed technical approach fully exploits the properties of stochastic geometry, where the number of active cells is reduced in a way that the outage probability, or equivalently the signal to interference plus noise (SINR) distribution, remains the same. The optimal EE gains are then specified with the help of a simplified but yet realistic BS power consumption model. Furthermore, the authors extend their initial work by studying a non-singular path loss model in order to verify the validity of the analysis and finally, the impact on the achieved user capacity is investigated. In this context, the significant contribution of this paper is the evaluation of the theoretically optimal energy savings of sleep mode, with respect to the decisive role that the BS power profile plays.
Mots clés
OFDM modulation
energy conservation
frequency division multiple access
geometry
power consumption
probability
radiofrequency interference
telecommunication power management
BS power consumption model
BS power profile
EE
OFDMA wireless network
SINR distribution
active cells
base station
energy efficiency
network energy consumption
nonsingular path loss model
optimal energy saving
orthogonal frequency-division multiple access wireless network
outage probability
signal to interference plus noise
sleep mode
stochastic analysis
stochastic geometry
user capacity
Analytical models
Interference
Mathematical model
Optimized production technology
Power demand
Signal to noise ratio
Stochastic processes
| Origine | Fichiers produits par l'(les) auteur(s) |
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