Abstract
The extensive increase in the number of mobile devices and their data-rate requirements will lead to the scarcity of network resources. One of the promising solutions to keep up with the capacity and coverage demands of the 5th generation and beyond of cellular networks is to exploit the dual connectivity (DC) feature in heterogeneous networks (HetNets). In this work, a two-tier aerial HetNet with decoupled access and reverse frequency allocation strategy is considered and the DC feature for the network edge users is investigated. The analytical expressions of the coverage probability for the first and second uplink (UL) connections in DC are derived. Our proposed setup improves the coverage performance of the DC with decoupled access in relation to single connectivity (SC) with and without decoupled access. The results show a relative increase in the DC-based coverage performance of 10.6% and 82.6%, for a signal-to-interference-ratio (SIR) threshold of −20 dB, with respect to SC with and without decoupled access, respectively. Moreover, DC-based coverage in aerial HetNets is resilient to jamming interference. The results also show that if the wide-band jammers (WBJs) are present around a target-user equipment, the legitimate UL transmission is severely disrupted by the jamming interference. For instance, the percentage-decrease in the coverage performance of DC with decoupled access for the SIR threshold set to −20 dB is 4.9% and 10.6%, when the WBJs is set to 2 and 4, respectively. The coverage performance further decreases with an increase in the transmit powers of the WBJs and their number, whereas increases with an increase in the radius of the WBJs cluster.
Highlights
The tremendous increase in the user-demand for capacity and coverage along with the performance improvemnts due to the proliferation in the scale of mobile devices, services, and wireless networks will lead to scarcity of resources in the 5th generation and beyond of cellular networks
In dual connectivity (DC) with DL and UL decoupling (DUDe) or decoupled access for two-tier aerial heterogeneous networks (HetNets), the first DL connection of a T-user equipment (UE) is established with the unmanned aerial vehicles (UAVs) of tier 1 on the basis of DRP while, the first UL connection is established on the basis of maximum received signal strength at the UAV of tier 2
Similar to [6], [20], [46], we investigate the performance of the aerial HetNets in terms of the coverage probability by deriving the probability density function (PDF) of the distance-distribution between the UAV and a T-UE that is located at the cell-edge or the decoupled-enabled region
Summary
The tremendous increase in the user-demand for capacity and coverage along with the performance improvemnts due to the proliferation in the scale of mobile devices, services, and wireless networks will lead to scarcity of resources in the 5th generation and beyond of cellular networks. The aerial HetNets-performance is investigated in conjunction with RFA and WBJs in [7]. In [11], the outage probability is investigated for aerial HetNets by assuming multiple pathloss exponents of a K-tier aerial HetNet. the research lacks the DC feature in conjunction with RFA and jamming interference. In [7], decoupled access for the aerial HetNets in the presence of RFA and jamming interference is investigated. The research in [6], [7] is limited in terms of the joint analysis of DC and decoupled access In contrast to these works, we employ DC along with the decoupled access in the presence of RFA and jamming interference.
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