Energy-Efficient Downlink Resource Allocation in Heterogeneous OFDMA Networks - CentraleSupélec Accéder directement au contenu
Article Dans Une Revue IEEE Transactions on Vehicular Technology Année : 2017

Energy-Efficient Downlink Resource Allocation in Heterogeneous OFDMA Networks

Kai Yang
  • Fonction : Auteur
Steven Martin
  • Fonction : Auteur
  • PersonId : 837952
Dominique Quadri
  • Fonction : Auteur
  • PersonId : 957864
Wu Jinsong
  • Fonction : Auteur
Gang Feng
  • Fonction : Auteur
  • PersonId : 882696

Résumé

In this paper, we investigate energy-efficient downlink resource allocation in heterogeneous OFDMA networks, and formulate the energy efficiency (EE) maximization problem as a mixed-integer nonlinear fractional programming (MINLFP) problem with a non-concave nonlinear objective function and nonlinear constraints. By means of fractional programming and changing of variables, we transform the original MINLFP problem into an equivalent optimization problem in a parametric subtractive form, which is proved to be a concave mixed-integer nonlinear programming (MINLP) problem and is optimally solved by using Dinkelbach and branch-and-bound (BB) methods. In BB method, the concave MINLP problem is relaxed to a series of concave nonlinear programming problems and solved by the use of Powell-Hestenes-Rockafellar augmented Lagrangian method. The optimal solution can be used to benchmark the performance of sub-optimal solutions. As the computational complexity of BB method increases exponentially with problem size, we further develop a sub-optimal two-step scheme, which first allocates the resource blocks and then performs the transmit power control, to give sub-optimal solution with much lower complexity. Simulation results demonstrate the effectiveness of the proposed schemes and show that the proposed sub-optimal two-step scheme is promising for practical applications as it makes a good tradeoff between EE performance and computational complexity.
Fichier non déposé

Dates et versions

hal-01477470 , version 1 (27-02-2017)

Identifiants

Citer

Kai Yang, Steven Martin, Dominique Quadri, Wu Jinsong, Gang Feng. Energy-Efficient Downlink Resource Allocation in Heterogeneous OFDMA Networks. IEEE Transactions on Vehicular Technology, 2017, 66 (6), ⟨10.1109/TVT.2016.2624022⟩. ⟨hal-01477470⟩
129 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More