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• W2912581104 abstract "In this paper, a three-tier hybrid cellular heterogeneous network is considered using the microwave ( $mu $ Wave) links for the first two tiers and millimeter (mmWave) links for the last tier. The two-tiers with $mu $ Wave 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 $mu $ Wave 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 $mu $ Wave 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 $mu $ Wave and mmWave links is investigated. Results indicate that the optimal SIR threshold required for the $mu $ Wave 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." @default.
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• W2912581104 date "2019-01-01" @default.
• W2912581104 modified "2023-09-23" @default.
• W2912581104 title "Performance Analysis of a Wireless Backhaul in a Three-Tier Hybrid Network With Directional Antennas" @default.
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• W2912581104 doi "https://doi.org/10.1109/access.2019.2895731" @default.
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