Joint Power and Admission Control for Spectral and Energy Efficiency Maximization in Heterogeneous OFDMA Networks

Lai, Wei-Sheng; Chang, Tsung-Hui; Lee, Ta-Sung

doi:10.1109/twc.2016.2522958

Cited by 44 publications

(28 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Likewise, many research works have focused on maximizing SE and EE, particularly for small cell-based heterogeneous networks. For example, the authors in [38] have considered joint power and admission control to maximize SE and EE for orthogonal frequency division multiplexing access based heterogeneous networks. In [39], the authors have explored potential cooperation gains via a cooperative bargaining game to counter the challenges of mitigating interference and saving energy to improve SE and EE.…”

Section: Related Work and Problem Statementmentioning

confidence: 99%

On Maximizing Energy and Spectral Efficiencies Using Small Cells in 5G and Beyond Networks

Saha

2020

Sensors

View full text Add to dashboard Cite

Addressing high capacity at low power as a key design goal envisages achieving high spectral efficiency (SE) and energy efficiency (EE) for the next-generation mobile networks. Because most data are generated in indoor environments, an ultra-dense deployment of small cells (SCs), particularly within multistory buildings in urban areas, is revealed as an effective technique to improve SE and EE by numerous studies. In this paper, we present a framework exploiting the four most interconnected-domain, including, power, time, frequency, and space, in the perspectives of SE and EE. Unlike existing literature, the framework takes advantage of higher degrees of freedom to maximize SE and EE using in-building SCs for 5G and beyond mobile networks. We derive average capacity, SE, and EE metrics, along with defining the condition for optimality of SE and EE and developing an algorithm for the framework. An extensive system-level evaluation is performed to show the impact of each domain on SE and EE. It is shown that employing multiband enabled SC base stations (SBSs) to increase operating spectrum in frequency-domain, reusing spectrum to SBSs more than once per building in spatial-domain, switching on and off each in-building SBS based on traffic availability to reduce SBS power consumption in power-domain, and using eICIC to avoid co-channel interference due to sharing spectrum with SBSs in time-domain can achieve massive SE and EE. Finally, we show that the proposed framework can satisfy SE, EE, as well as user experience data rate requirements for 5G and beyond mobile networks.

show abstract

Section: Related Work and Problem Statementmentioning

confidence: 99%

On Maximizing Energy and Spectral Efficiencies Using Small Cells in 5G and Beyond Networks

Saha

2020

Sensors

View full text Add to dashboard Cite

show abstract

“…where µ > 0 is the smoothing parameter. By (18) in Proposition 2, the objective functionf (q, µ) of problem (23) is differentiable everywhere with respect to q and its gradient is given by…”

Section: B Solution For Approximation Problemmentioning

confidence: 99%

Sample Approximation-Based Deflation Approaches for Chance SINR Constrained Joint Power and Admission Control

Liu

Mei

Song

2016

IEEE Trans. Wireless Commun.

View full text Add to dashboard Cite

Consider the joint power and admission control (JPAC) problem for a multi-user single-input singleoutput (SISO) interference channel. Most existing works on JPAC assume the perfect instantaneous channel state information (CSI). In this paper, we consider the JPAC problem with the imperfect CSI, that is, we assume that only the channel distribution information (CDI) is available. We formulate the JPAC problem into a chance (probabilistic) constrained program, where each link's SINR outage probability is enforced to be less than or equal to a specified tolerance. To circumvent the computational difficulty of the chance SINR constraints, we propose to use the sample (scenario) approximation scheme to convert them into finitely many simple linear constraints. Furthermore, we reformulate the sample approximation of the chance SINR constrained JPAC problem as a composite group sparse minimization problem and then approximate it by a second-order cone program (SOCP). The solution of the SOCP approximation can be used to check the simultaneous supportability of all links in the network and to guide an iterative link removal procedure (the deflation approach). We exploit the special structure of Part of this work has been presented in the

show abstract

“…In particular, the EE of the small-cells is maximized whilst preventing any potential severe interference leakage to the macro-cell UEs. The authors in [28] further investigate the joint power allocation and admission control problem in OFDMA-based HCNs. Specifically, considering spectrum underlay access, a novel resource allocation approach has been proposed with the goal of admitting the maximum possible number of UEs whilst keeping interference below a certain threshold.…”

Section: Introductionmentioning

confidence: 99%

Energy-Efficient Heterogeneous Cellular Networks With Spectrum Underlay and Overlay Access

Tang

Alsusa

et al. 2018

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

In this paper, we provide joint subcarrier assignment and power allocation schemes for quality-of-service (QoS)-constrained energy-efficiency (EE) optimization in the downlink of an orthogonal frequency division multiple access (OFDMA)-based two-tier heterogeneous cellular network (HCN). Considering underlay transmission, where spectrum-efficiency (SE) is fully exploited, the EE solution involves tackling a complex mixed-combinatorial and non-convex optimization problem. With appropriate decomposition of the original problem and leveraging on the quasi-concavity of the EE function, we propose a dual-layer resource allocation approach and provide a complete solution using difference-of-two-concave-functions approximation, successive convex approximation, and gradient-search methods. On the other hand, the inherent inter-tier interference from spectrum underlay access may degrade EE particularly under dense small-cell deployment and large bandwidth utilization. We therefore develop a novel resource allocation approach based on the concepts of spectrum overlay access and resource efficiency (RE) (normalized EE-SE trade-off). Specifically, the optimization procedure is separated in this case such that the macro-cell optimal RE and corresponding bandwidth is first determined, then the EE of small-cells utilizing the remaining spectrum is maximized. Simulation results confirm the theoretical findings and demonstrate that the proposed resource allocation schemes can approach the optimal EE with each strategy being superior under certain system settings. Index TermsHeterogeneous cellular network (HCN), orthogonal frequency division multiple access (OFDMA), energy-efficiency (EE), spectrum-efficiency (SE), resource efficiency (RE).

show abstract

Joint Power and Admission Control for Spectral and Energy Efficiency Maximization in Heterogeneous OFDMA Networks

Cited by 44 publications

References 35 publications

On Maximizing Energy and Spectral Efficiencies Using Small Cells in 5G and Beyond Networks

On Maximizing Energy and Spectral Efficiencies Using Small Cells in 5G and Beyond Networks

Sample Approximation-Based Deflation Approaches for Chance SINR Constrained Joint Power and Admission Control

Energy-Efficient Heterogeneous Cellular Networks With Spectrum Underlay and Overlay Access

Contact Info

Product

Resources

About