Spectrum and Energy Efficiency Evaluation of Two-Tier Femtocell Networks With Partially Open Channels

Ge, Xiaohu; Zhang, Yan; Mao, Guoqiang; Wang, Cheng-Xiang; Zhang, Jing; Yang, Bin; Pan, Sheng

doi:10.1109/tvt.2013.2292084

Cited by 48 publications

(40 citation statements)

References 30 publications

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“…20 Ashraf et al 21 address the issue of energy consumption by proposing a novel energy-saving procedure. Considering the partially open channels, Ge et al 22 conduct performance analysis for two-tier femtocell networks. In particular, it builds a Markov chain to model the channel access in the femtocell network and then derives the performance metrics in terms of the blocking probabilities.…”

Section: Related Workmentioning

confidence: 99%

Energy-efficient power control for two-tier femtocell networks with block-fading channels

Liu

et al. 2017

International Journal of Distributed Sensor Networks

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Femtocell network is an effective technique to improve spectrum utilization and indoor coverage. How to allocate users power while keeping acceptable performance under dynamic environment is still a challenge in practice. In this article, we study the problem of energy efficiency in a two-tier network. The objective of the article is to maximize energy efficiency for the two-tier femtocell network with the consideration of uncertain channels. The complex and dynamic communication environment will lead to the imperfect channel state information. In order to enhance the robustness of the two-tier network, we consider the imperfect channel state information of interference links in block-fading channels using probability constraints. We propose a novel scheme to derive optimal energy efficiency by transforming probability constraints into indicator function. A distributed iterative algorithm is proposed to obtain the optimal power solution. Numerical results illustrate the effectiveness of the proposed power control algorithm.

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Section: Related Workmentioning

confidence: 99%

Energy-efficient power control for two-tier femtocell networks with block-fading channels

Liu

et al. 2017

International Journal of Distributed Sensor Networks

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“…When femtocell operates in closed access mode, the pdf of the distance R m (or R f ) between each MBS (or FAP) and its designated MUE (or FUE) pair is given by 2πrλ m E {s m } exp(−πr 2 …”

Section: Activity-aware Sleeping Strategymentioning

confidence: 99%

Energy-efficient design of two-tier femtocell networks

Wang¹,

Zhang²,

Chen³

et al. 2015

J Wireless Com Network

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With the exponential increase in mobile internet traffic, future cellular networks face great challenges to satisfy the demand of network capacity. At the same time, high data rate transmission and rapid increasing number of users also seriously burden the power consumption and the cost of cellular networks. Base station (BS) is the main part of power consumption, so reducing energy consumption of the BS can obviously reduce the total energy consumption. This paper investigates the effect on energy efficiency by adopting activity-aware sleeping strategies both in macrocell base station (MBS) and femtocell access point (FAP) in a two-tier femtocell network. By using stochastic geometry, we develop a trade-off between energy saving and coverage extension, regarded as the FAP additional connections by neighboring femtocell user equipment (FUE) or macrocell user equipment (MUE). Specifically, we derive users' coverage probabilities, which is defined as the probability of user connecting to BS, in closed forms with different sleeping strategies and access policies. Moreover, we formulate power consumption minimization and energy efficiency problem and determine the optimal joint MBS-FAP operating regimes. Numerical results show that sleeping scheme and femtocell access mode both have effects on coverage probability and energy efficiency, and the effect of femtocell access mode on coverage probability is greater than sleeping scheme.

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“…the SUs, have access to the small cell (MUs cannot connect to the small cell); ii) open access, all users can make use of any small cell (in that sense, there are no differences between SUs and MUs); and iii) hybrid access, a limited amount of the small cell resources are available to MUs, while SUs have no restrictions. The hybrid access mode is proposed as a trade-off between open and closed access modes [18], [17], [19]. Depending on the system resources, users traffic profile, number of MUs and their mobility pattern, number of SUs, degree of interference and small cell backhaul capacity constraints, the RP in the hybrid access mode has to be carefully configured in order to guarantee a certain degree of QoS to the SUs.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Two-Tier Wireless Networks With Dynamic Traffic, Backhaul Constraints, and Terminal Mobility

Bernal-Mor

Pla

Martínez-Bauset

et al. 2016

IEEE Trans. Veh. Technol.

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Bernal Mor, E.; Pla, V.; Martínez Bauset, J.; Luis Guijarro (2016) Abstract-During the last years, mobile cellular networks have witnessed an enormous growth in the carried data-traffic volume. The current networks' features are not enough to cope with this traffic trend and the concept of small cells has emerged as a feasible solution to increase the network capacity. However, the deployment of small cells introduces several technical challenges such as the cross-tier interference between the macrocell and the small cells, or the use of the subscriber land-line to send the backhaul data. In this paper, an analytical model is proposed to study the impact that the user traffic dynamics, the mobility of macrocell users, the scheme chosen to associate macrocell users to the small cells and the changing available capacity of the small cells backhaul have on the system performance. To make the solution of the model computationally feasible, we exploit the time-scale decomposition approach. In most practical scenarios, the arrival and departure rates of traffic flows are much larger than the rate of events associated with the mobility of macrocell users. Then, flows perceive that macrocell users are still. This model is applied to identify the scheme to associate macrocell users to the small cells which maximizes the performance perceived by the small cell users.

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Spectrum and Energy Efficiency Evaluation of Two-Tier Femtocell Networks With Partially Open Channels

Cited by 48 publications

References 30 publications

Energy-efficient power control for two-tier femtocell networks with block-fading channels

Energy-efficient power control for two-tier femtocell networks with block-fading channels

Energy-efficient design of two-tier femtocell networks

Performance Analysis of Two-Tier Wireless Networks With Dynamic Traffic, Backhaul Constraints, and Terminal Mobility

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