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Joint Power and Bandwidth Allocation for Energy-Efficient Heterogeneous Cellular Networks.
- Source :
- IEEE Transactions on Communications; Sep2019, Vol. 67 Issue 9, p6168-6178, 11p
- Publication Year :
- 2019
-
Abstract
- This paper investigates the problem of energy efficiency maximization (EEM) for the small cells that coexist with a macro cell in an underlay heterogeneous cellular network, where a macro base station and a number of small base stations transmit signals to a macro user and small users through their shared spectrum. We propose a joint power and bandwidth allocation (JPBA) scheme for the sake of maximizing the energy efficiency (EE) of small cells under the constraint of a guaranteed quality-of-service requirement for the macro cell. Considering that our formulated EEM-based JPBA (EEM-JPBA) problem is non-convex, we convert the original fractional problem into an equivalent subtractive form by adopting the Dinkelbach’s method, which is addressed through the augmented Lagrange multiplier approach. Moreover, a new two-tier iterative algorithm is presented to obtain the optimal solution of our EEM-JPBA scheme. Simulation results demonstrate that the proposed two-tier iterative algorithm can quickly converge to the optimal EE solution. In addition, it is shown that the proposed EEM-JPBA scheme significantly outperforms the conventional power and bandwidth allocation methods in terms of their EE performance. [ABSTRACT FROM AUTHOR]
- Subjects :
- BANDWIDTH allocation
LAGRANGE multiplier
ENERGY consumption
Subjects
Details
- Language :
- English
- ISSN :
- 00906778
- Volume :
- 67
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Communications
- Publication Type :
- Academic Journal
- Accession number :
- 138733322
- Full Text :
- https://doi.org/10.1109/TCOMM.2019.2921022