Abstract
Unmanned aerial vehicles (UAVs), also named as drones, have become a modern model to provide a quick wireless communication infrastructure. They have been used when conventional base stations’ capacity is suffering in some extreme cases such as congestion inside the cell or a special event. This paper proposes an efficient three‐dimension (3D) placement of a single UAV‐assisted wireless network in such cases. Our proposed model assists the ground base station (GBS) using the UAV to serve arbitrary distributed users considering the impact of the obstacle blockage over the well‐known air‐to‐ground (A2G) path model. This work is aimed at optimizing the percentage of available bandwidth that must be provided to the UAV in order to maximize the number of served users. In addition, it finds the 3D placement of the UAV base station (UAVBS) that maximizes the number of served users, each with maximum quality‐of‐service (QoS). The exhaustive search and particle swarm optimization (PSO) algorithms are used to find the problem’s solution.
Highlights
The evolution of Unmanned aerial vehicles (UAVs), commonly known as drones or network flying platforms (NFPs), is a key to enhance wireless communications because of their high coverage, promising rates, low cost, high mobility, adjustable height, and flexible installation
In this work with considering the coexistence of ground cellular systems (i.e., ground base station (GBS) with UAV base station (UAVBS) together), we investigate how to deploy and determine the 3D location for the UAVBS and optimize the bandwidth allocation between GBS and UAVBS to maximize the number of served users with maximum quality of service (QoS)
We discuss how to improve the performance of the wireless network by considering a coexistence of ground cellular systems, such as GBS and UAVBS, in an extreme event to find the optimal UAVBS’s location so that the number of served users with maximum QoS is maximized
Summary
The evolution of UAVs, commonly known as drones or network flying platforms (NFPs), is a key to enhance wireless communications because of their high coverage, promising rates, low cost, high mobility, adjustable height, and flexible installation. UAVs can function as aerial user equipment such as carrier aircraft or surveillance drones [3]. UAVBSs can be hurriedly deployed based on demand, such as temporary or unexpected events. They provide high reliable links for communication due to their high altitude above the ground. Regarding the high mobility of UAVs, UAVBSs own an additional degree of freedom (DoF) to adjust their locations in 3D which enhances communication performance [2, 4]. The UAV is considered as an aerial base station
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