Name
Abstract | ||
|---|---|---|
In this paper, we consider a downlink non-orthogonal multiple access (NOMA) heterogeneous small cell networks (HSCN), where the macro base station (MBS) simultaneously communicate with multiple small cell base stations (SBS) through the wireless backhauls. The goal is to investigate an energy-efficient power, and bandwidth allocation scheme aiming at maximizing the EE of the small cells in downlink NOMA-HSCN constrained by the maximum transmit power and the minimum required data rate simultaneously. The optimization problem is non-convex due to the fractional objective function and non-convex constraints and is challenging to obtain an exact solution efficiently. To deal with the problem, the joint optimization is first decomposed into two subproblems. Then, an iterative algorithm to solve the power optimization subproblem is proposed with guaranteed convergence. Furthermore, a closed-form solution for the bandwidth allocation subproblem is derived. Finally, an iterative power and bandwidth allocation algorithm are proposed for NOMA-HSCN. Simulation results reveal the effectiveness of the proposed schemes in terms of energy efficiency (EE) as compared to the existing NOMA schemes and the conventional orthogonal multiple access (OMA) baseline schemes. |
Year | DOI | Venue |
|---|---|---|
2019 | 10.1109/WCSP.2019.8928005 | 2019 11th International Conference on Wireless Communications and Signal Processing (WCSP) |
Keywords | Field | DocType |
nonconvex constraints,power optimization subproblem,energy efficiency,resource allocation,NOMA enhanced small cell networks,downlink nonorthogonal multiple access heterogeneous small cell networks,macrobase station,multiple small cell base stations,downlink NOMA-HSCN,orthogonal multiple access baseline schemes,bandwidth allocation subproblem algorithm,SBS,iterative power algorithm,EE,OMA baseline schemes,orthogonal multiple access baseline schemes | Mathematical optimization,Transmitter power output,Power optimization,Iterative method,Computer science,Bandwidth allocation,Computer network,Resource allocation,Small cell,Channel allocation schemes,Optimization problem | Conference |
ISSN | ISBN | Citations |
2325-3746 | 978-1-7281-3556-4 | 1 |
PageRank | References | Authors |
0.36 | 13 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Alemu Jorgi Muhammed | 1 | 11 | 1.18 |
| Zheng Ma | 2 | 376 | 46.43 |
| Zhengquan Zhang | 3 | 154 | 5.60 |
| Pingzhi Fan | 4 | 3233 | 265.09 |