On the Design of OFDMA-Based FFR-Aided Irregular Cellular Networks With Shadowing

García-Morales, Jan; Femenias, Guillem; Riera-Palou, Felip

doi:10.1109/access.2018.2804927

Cited by 7 publications

(9 citation statements)

References 20 publications

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“…In [14], the authors showed the improved performance of the outage probability and the average cell-edge user throughput through coordinated SFR (CoSFR), in which the multicell networks with nonuniform user distribution was considered. In [15], the authors developed a model for analyzing FFR-aided OFDMAbased multi-cellular networks that incorporates shadowing effects and considers the irregular cellular networks. In [24], the authors proposed an analytical model for evaluating the performance of FFR-aided heterogeneous networks (HetNet) that considers both co-tier and cross-tier interference.…”

Section: Related Workmentioning

confidence: 99%

“…We consider a cellular network with a Spectrum handoff-SFR(S-SFR)-based system. We consider the 2-tier cell cluster model used in many inter-cell interference studies [12][13][14][15][16][17][18][19][20][21][22]. As shown in Fig.…”

Section: System Model 21 Cellular Network Topologymentioning

confidence: 99%

“…For example, suppose that a UE is using an inner PRB 1 F . Two types of interference scenarios exist: (i) the interferences occur from cells 2,4,6,8,10,12,13,14,15,16,17, and 18 with resource utilization of inner PRB, i ρ , (ii) the interferences occur from cells 1, 3, 5, 7, 9, and 11 with o ρ . Similarly, for the case where the UE uses the outer PRB, the interference scenarios are summarized in Table 1.…”

Section: Outage Analysismentioning

confidence: 99%

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Performance Analysis of S-SFR-based OFDMA Cellular Systems

Kim¹,

Cho²,

Yoon³

et al. 2019

KSII TIIS

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Intercell interference coordination (ICIC) is considered as a promising technique to increase the spectral efficiency of OFDMA cellular systems. The soft frequency reuse (SFR) and fractional frequency reuse (FFR) are representative and efficient management techniques for ICIC. Herein, to enhance the performance of the SFR scheme, we propose a call admission (CAC) scheme. In this CAC scheme, called Spectrum handoff-SFR(S-SFR), the spectrum handoff technique is applied to the user equipment (UE) located near the cell center. We derive the traffic analysis model to describe the S-SFR. In addition, a two-dimensional (2-D) Markov chain and an outage analysis are used in our analytical model. From the traffic analysis, the significant performance measures are the outage probability, call blocking probability, system throughput and resource utilization. Based on those, the outage probability and system throughput are obtained using resource utilization as an interference pattern. The analytical results are verified with computer simulation results. Finally, we compare our proposed scheme with other ICI schemes.

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Section: Related Workmentioning

confidence: 99%

Section: System Model 21 Cellular Network Topologymentioning

confidence: 99%

Section: Outage Analysismentioning

confidence: 99%

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Performance Analysis of S-SFR-based OFDMA Cellular Systems

Kim¹,

Cho²,

Yoon³

et al. 2019

KSII TIIS

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“…To mitigate these problems and improve the performance of cell‐edge UEs in 5G/B5G HetNets, different resource allocation technologies have been proposed, such as the fractional frequency reuse (FFR) and soft frequency reuse (SFR) 8‐17 . However, although the strict FFR and SFR have many advantages, its application in 5G/B5G HetNets is limited.…”

Section: Introductionmentioning

confidence: 99%

Modeling and analyzing multi‐tier massive multiple‐input multiple‐output‐enabled heterogeneous networks with hybrid spectrum allocation for cluster‐center and cluster‐edge users

Jia

Chen

et al. 2020

Trans Emerging Tel Tech

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With the proliferation of high‐speed multi‐media applications and high‐dense Internet‐of‐Things devices, the future 5G/B5G networks will face the emergence of dense hotspot communications. A key consequence of such hotspots is the heterogeneity of base stations' deployment and the user base station (BS) coupling, where the user equipments (UEs) tend to form spatial clusters or hotspots. With these motivations, this article considers a realistic scenario for clustered heterogeneous networks, which consists of macro‐BSs (MBSs), pico‐BSs (PBSs), and femto‐BSs (FBSs). To restrict the severe interference from inter and intra‐tier transmitters, a clustered‐UEs classification is developed based on the coverage radius of PBSs. With the clustered‐UEs classification, this article develops a modified separated spectrum allocation scheme. To further exploit potential, we also consider the cases of ordered and non‐ordered FBSs associations and construct the derivations of both the statistical descriptions of association distances and the association probabilities for different scenarios. By using the approximated Poisson hole process theory which is accurate and simple enough, the statistical description of the interference experienced at a typical receiver is given, and the coverage probabilities are also derived. The simulation results achieve that the performance gain from the case of ordered FBSs over the one from the case of non‐ordered FBSs greatly depends on the coverage radii of PBSs and FBSs. Meanwhile, the distributions of both FBSs and UEs also impose the non‐negligible contributions on network performance.

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“…As it is typically done in the background literature (see[12],[31]-[33]), and for analytical simplicity, only pathloss and small scale fading are taken into account in this paper. In future research, the current framework will be extended to take into account the large scale fading (shadowing) and irregular BS deployments as well[34].…”

mentioning

confidence: 99%

Higher Order Sectorization in FFR-Aided OFDMA Cellular Networks: Spectral- and Energy-Efficiency

2019

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It is well known that per macro-site spectral efficiency (SE) can be increased through higher order sectorization (HOS) by radially partitioning the coverage area of each site into multiple sectors and reusing the spectral resources in each sector and across all sites. In order to further reinforce its benefits, HOS can be combined with fractional frequency reuse (FFR) techniques to improve the SE and/or energy efficiency (EE) of the network. This paper presents an analytical framework that is used to assess the sectorization performance in terms of both the SE and EE in the downlink of HOS/FFRaided orthogonal frequency-division multiple access (OFDMA)-based macro-cellular networks. Tractable mathematical expressions are derived for the round robin, the proportional fair, and the maximum signalto-interference-plus-noise ratio scheduling rules and the corresponding capacities. The results show the impact of the sectorization gain on the system performance for different cell-edge frequency reuse factor values. Furthermore, an optimization problem for the HOS/FFR-aided OFDMA-based network is addressed, allowing a tradeoff between the EE performance and fairness by suitably dimensioning the FFR inner and outer areas and the corresponding frequency allocation to each of these regions.

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On the Design of OFDMA-Based FFR-Aided Irregular Cellular Networks With Shadowing

Cited by 7 publications

References 20 publications

Performance Analysis of S-SFR-based OFDMA Cellular Systems

Performance Analysis of S-SFR-based OFDMA Cellular Systems

Modeling and analyzing multi‐tier massive multiple‐input multiple‐output‐enabled heterogeneous networks with hybrid spectrum allocation for cluster‐center and cluster‐edge users

Higher Order Sectorization in FFR-Aided OFDMA Cellular Networks: Spectral- and Energy-Efficiency

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