Coverage and Rate Analysis for Massive MIMO-Enabled Heterogeneous Networks with Millimeter Wave Small Cells

Umer, Anum; Hassan, Syed Ali; Pervaiz, Haris; Ni, Qiang; Musavian, Leila

doi:10.1109/vtcspring.2017.8108471

Cited by 17 publications

(12 citation statements)

References 6 publications

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“…The probability of a user being associated to an NLoS small cell BS, given that a user is being served by the mmWave small cell tier is (19) where N (x) = x α N /α L , equality (a) follows from (32), and f N ( p(t))tdt} obtained by the following [9, Lemma 2], and…”

Section: B Mmwave Small Cell Tier Coveragementioning

confidence: 99%

Multiobjective Optimization in 5G Hybrid Networks

Omar

Hassan

Pervaiz

et al. 2018

IEEE Internet Things J.

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The increasing adoption of the Internet of Things has led to the need for systems with higher spectral and energy efficiency (EE) in order to enable communication. Larger data rate demands had led researchers to look at millimeter wave (mmWave) bands to boost network rates. This paper investigates the downlink performance of a three-tier heterogeneous network that consists of sub-6 GHz macrocells overlaid with small cells operating on both the mmWave and sub-6 GHz bands. A model is developed using tools from stochastic geometry to analyze the coverage, rate, area spectral efficiency, and EE of such a network. Various deployment strategies and their impacts on the considered metrics are studied. Simulation results are used to verify the validity of the proposed model.Index Terms-Blockage models, fifth generation (5G), hybrid heterogeneous networks (HetNets), Internet of Things (IoT), millimeter wave, stochastic geometry.

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Section: B Mmwave Small Cell Tier Coveragementioning

confidence: 99%

Multiobjective Optimization in 5G Hybrid Networks

Omar

Hassan

Pervaiz

et al. 2018

IEEE Internet Things J.

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“…In this work, it is assumed that the legitimate user connects to the BS that provides maximum average received power [28]. Thus, the typical user located at the origin will connect to tier j only if…”

Section: B Downlink User Associationmentioning

confidence: 99%

Secrecy Spectrum and Energy Efficiency Analysis in Massive MIMO-Enabled Multi-Tier Hybrid HetNets

Umer

Hassan

Pervaiz

et al. 2020

IEEE Trans. on Green Commun. Netw.

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Massive multiple antenna systems in conjunction with millimeter (mmWave) communication have gained tremendous attention in the recent years owing to their high speed data delivery. However, security in these networks has been overlooked; thereby necessitating a comprehensive study. This paper analyzes the physical layer security performance of the downlink of a massive multiple-input multiple-output (MIMO)-based hybrid heterogeneous network (HetNet) where both mmWave and sub-6 GHz small cells coexist. Specifically, a tractable approach using stochastic geometry is proposed to analyze the secrecy outage probability, secrecy energy efficiency (SEE) and secrecy spectrum efficiency (SSE) of the hybrid HetNets. Our study further characterizes the impact of large antenna arrays, directional beamforming gains, transmit power, and cell density on the above mentioned secrecy performance measures. The results show that at low transmit power operation, the secrecy performance enhances for higher small cell density. It has also been observed that the higher directivity gains at mmWave cells lead to a drop in secrecy performance of the network; thus a tradeoff exists between better coverage or secrecy.This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/. This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Citation information: DOI 10.1109/TGCN.2019.2956433, IEEE Transactions on Green Communications and Networking complex solution for the protection of confidential information in complex wireless networks [8]. Particularly, PLS in massive MIMO-enabled hybrid HetNets with mmWave small cells is important since the aforementioned networks present the most common deployment scenario for the future 5G communication networks. This paper analyses the PLS in massive MIMO-enabled hybrid HetNets by digging into unique advantageous properties of massive MIMO and mmWave channel.

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“…In order to find the optimal SIR threshold that maximizes the ASE for the µWave tier, the optimization problem is stated as in (15), where the constraint insures higher data rate for wireless backhaul information than access information [23].…”

Section: ) µWave Tiermentioning

confidence: 99%

“…The results showed that the hybrid network achieved an average rate under coverage which is comparable to that of a mmWave network and much higher than the stand alone UHF network. In [15], the downlink performance in terms of coverage and rate of a three tier hybrid network where massive multiple input multiple output (MIMO) macro base stations (MBSs) are overlaid with small cells operating at either sub 6 GHz or mmWave bands was presented and the users were assumed to connect to any of the tier according to the association probability. It was observed that the implementation of massive MIMO on macro tier and deployment of high density of mmWave small cells led to the enhancement of rate and coverage.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a Wireless Backhaul in a Three-Tier Hybrid Network With Directional Antennas

Shoukry¹,

Balasubramanya²,

Vuppala³

et al. 2019

IEEE Access

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In this paper, a three-tier hybrid cellular heterogeneous network is considered using the microwave (µWave) links for the first two tiers and millimeter (mmWave) links for the last tier. The two-tiers with µWave links form a wireless backhaul to the last tier with mmWave links. The main challenge in having a wireless backhaul is to suppress interference. Thus, we propose a novel and practical model where we can reuse the µWave infrastructure, but equip the BSs with directional antennas to have a robust wireless backhaul network. To solve the bottleneck rate problem, we assume that the rate required by the mmWave users is comparable to that offered by the µWave links. Different configurations based on the placement of the directional antennas at each tier are explored. The analysis of the key performance indicators, namely, the coverage probability, area spectral efficiency, and energy efficiency using the conventional minimum rate model, and the simulation results associated with these parameters are presented. In order to analyze this hybrid network with a wireless backhaul, an optimization problem for the overall area spectral efficiency and energy efficiency with respect to the optimal signal-to-interference ratio (SIR) threshold required for µWave and mmWave links is investigated. Results indicate that the optimal SIR threshold required for the µWave tiers (wireless backhaul) depends only on the path-loss exponent and that for the mmWave tier depends on the area of the line-of-sight region. Finally, instead of the conventional minimum rate model, we consider the average rate under coverage and show that the area spectral efficiency and energy efficiency are strictly decreasing functions with respect to the threshold, thereby concluding that they can be maximized by choosing the lowest possible SIR threshold available in the system.

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Coverage and Rate Analysis for Massive MIMO-Enabled Heterogeneous Networks with Millimeter Wave Small Cells

Cited by 17 publications

References 6 publications

Multiobjective Optimization in 5G Hybrid Networks

Multiobjective Optimization in 5G Hybrid Networks

Secrecy Spectrum and Energy Efficiency Analysis in Massive MIMO-Enabled Multi-Tier Hybrid HetNets

Performance Analysis of a Wireless Backhaul in a Three-Tier Hybrid Network With Directional Antennas

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