UAV-Aided Cooperation for FSO Communication Systems

Recently, the use of multi-rotor (MR) unmanned aerial vehicles (UAVs) has emerged as a promising solution for establishing flexible free-space optical (FSO) communication links. We address in this paper accurate channel modeling to assess the benefits of MR UAV-based deployment for such links. In particular, in the absence of active tracking subsystems, we derive statistical models for ground-to-UAV, UAV-to-UAV, and UAV-to-ground links over both Gamma-Gamma and lognormal atmospheric turbulence models. Unlike previous works on this topic, our proposed model considers the joint effect of atmospheric turbulence along with position and angle-of-arrival fluctuations. The high accuracy of the proposed analytical models is verified by comparing numerically solved and Monte-Carlo simulation results in terms of link outage probability. We further discuss the impact of different transmitter/receiver parameters and their optimization in view of maximizing the link availability.

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“…Considering the GG turbulence model, from (7), (13) and (14), the distribution of h = h l h a h pg conditioned on θ xy is obtained as…”

Section: A Uav-to-uav Channel Modelingmentioning

confidence: 99%

“…In [13], the use of flying platforms was proposed for backhaul/fronthaul connectivity of cellular networks via FSO/milimeter-wave links. The benefits of deploying UAVs for relay-assisted FSO systems were investigated in [14]. A channel model was introduced in [15] for an FSO link between a UAV and a ground robot.…”

Section: Introductionmentioning

confidence: 99%

Channel Modeling and Parameter Optimization for Hovering UAV-Based Free-Space Optical Links

Dabiri

Sadough

Khalighi

2018

IEEE J. Select. Areas Commun.

209

163

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“…Despite the application of NOMA in the cellular networks, NOMA is also a promising technology in other new usage scenarios, e.g., vehicle to X (V2X) [117][118][119], unmanned aerial vehicle (UAV) [120,121], and heterogeneous network (HetNet) [122], due to its superior performance. Although NOMA can be directly employed into these scenarios, elaborate design is still required to accommodate the channel characteristics of these scenarios and satisfy the diversified performance requirements.…”

Section: New Usage Scenariosmentioning

confidence: 99%

Uplink Nonorthogonal Multiple Access Technologies Toward 5G: A Survey

Han

Zhao

et al. 2018

Wireless Communications and Mobile Computing

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Owing to the superior performance in spectral efficiency, connectivity, and flexibility, nonorthogonal multiple access (NOMA) is recognized as the promising access protocol and is now undergoing the standardization process in 5G. Specifically, dozens of NOMA schemes have been proposed and discussed as the candidate multiple access technologies for the future radio access networks. This paper aims to make a comprehensive overview about the promising NOMA schemes. First of all, we analyze the state-of-the-art NOMA schemes by comparing the operations applied at the transmitter. Typical multiuser detection algorithms corresponding to these NOMA schemes are then introduced. Next, we focus on grant-free NOMA, which incorporates the NOMA techniques with uplink uncoordinated access and is expected to address the massive connectivity requirement of 5G. We present the motivation of applying grant-free NOMA, as well as the typical grant-free NOMA schemes and the detection techniques. In addition, this paper discusses the implementation issues of NOMA for practical deployment. Finally, we envision the future research challenges deduced from the recently proposed NOMA technologies.

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“…Drones have become an emerging technology with sensing, processing, storage, and communication capabilities. They can be used in different industries such as intelligent transportation systems, smart cities, [2][3][4][5][6] and Internet of things (IoT) scenarios. 7 The deployment of swarm of drones for IoT services has become reality for various applications such as package delivery, 8 public safety, 9 search and rescue, 10 tracking, and surveillance.…”

Section: Introductionmentioning

confidence: 99%

Bio-inspired clustering scheme for Internet of Drones application in industrial wireless sensor network

Aftab

Khan

Zhang

2019

International Journal of Distributed Sensor Networks

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Recent technological improvements have revolutionized the wireless sensor network-based industrial sector with the emergence of Internet of Things. Internet of Drones, a branch of Internet of Things, is used for the communication among drones. As drones are mobile in nature, they cause frequent topological changes. This changing topology causes scalability, stability, and route selection issues in Internet of Drones. To handle these issues, we propose a bio-inspired clustering scheme using dragonfly algorithm for cluster formation and management. In this article, we propose cluster head election based on the connectivity with the base station along with the fitness function which consists of residual energy and position of the drones. Furthermore, for route selection we propose an optimal path selection based on the residual energy and position of drone for efficient communication. The proposed scheme shows better results as compared to other bio-inspired clustering algorithms on the basis of evaluation benchmarks such as cluster building time, network energy consumption, cluster lifetime, and probability of successful delivery. The results indicate that the proposed scheme has improved 60% and 38% with respect to ant colony optimization and grey wolf optimization, respectively, in terms of average cluster building time while average energy consumption has improved 23% and 33% when compared to the ant colony optimization and grey wolf optimization, respectively.

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UAV-Aided Cooperation for FSO Communication Systems

Cited by 168 publications

References 14 publications

Channel Modeling and Parameter Optimization for Hovering UAV-Based Free-Space Optical Links

Channel Modeling and Parameter Optimization for Hovering UAV-Based Free-Space Optical Links

Uplink Nonorthogonal Multiple Access Technologies Toward 5G: A Survey

Bio-inspired clustering scheme for Internet of Drones application in industrial wireless sensor network

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