Revisiting Slotted ALOHA: Density Adaptation in FANETs

Eroglu, Alperen
Onur, Ertan
Unmanned aerial vehicles have been widely used in many areas of life. They communicate with each other or infrastructure to provide ubiquitous coverage or assist cellular and sensor networks. They construct flying ad hoc networks. One of the most significant problems in such networks is communication among them over a shared medium. Using random channel access techniques is a useful solution. Another important problem is that the variations in the density of these networks impact the quality of service and introduce many challenges. This paper presents a novel density-aware technique for flying ad hoc networks. We propose Density-aware Slotted ALOHA Protocol that utilizes slotted ALOHA with a dynamic random access probability determined using network density in a distributed fashion. Compared to the literature, this paper concentrates on proposing a three-dimensional, easily traceable model and stabilize the channel utilization performance of slotted ALOHA with an optimized channel access probability to its maximum theoretical level, 1/e, where e is the Euler's number. Monte-Carlo simulation results validate the proposed approach leveraging aggregate interference density estimator under the simple path-loss model. We compare our protocol with two existing protocols, which are Slotted ALOHA and Stabilized Slotted ALOHA. Comparison results show that the proposed protocol has 36.78% channel utilization performance; on the other hand, the other protocols have 24.74% and 30.32% channel utilization performances, respectively. Considering the stable results and accuracy, this model is practicable in highly dynamic networks even if the network is sparse or dense under higher mobility and reasonable non-uniform deployments.


Unmanned Aerial Vehicle Domain: Areas of Research
Demir, Kadir Alpaslan; Cicibas, Halil; ARICA, NAFİZ (2015-07-01)
Unmanned aerial vehicles (UAVs) domain has seen rapid developments in recent years. As the number of UAVs increases and as the missions involving UAVs vary, new research issues surface. An overview of the existing research areas in the UAV domain has been presented including the nature of the work categorised under different groups. These research areas are divided into two main streams: Technological and operational research areas. The research areas in technology are divided into onboard and ground techno...
Application of a Fixed-Wing Unmanned Aerial Vehicle (UAV) in Reforestation of Lebanon Cedar (Cedrus Libani A. Rich)
Şahin, Mustafa (null; 2011-03-16)
Studies and development of Unmanned Aerial Vehicles (UAVs) started shortly after the first controlled, powered, heavier-than-air human flight in 1903. UAVs have many advantages over piloted aircraft, such as minimizing human risk, flying economically, and flying for extended periods of time. Early UAVs were mostly developed for military purposes, but modern development encompasses both military and civilian uses and is now pursued worldwide. While UAVs serve a number of important civilian functions such as ...
Numerical investigation of flow control strategies on delta wings
Yıldırım, Alper; Sert, Cüneyt; Department of Mechanical Engineering (2019)
The use of Unmanned Aerial Vehicles (UAV), Unmanned Combat Aerial Vehicles (UCAV) and Micro Aerial Vehicles (MAV) have been increasing in recent years. The researchers aim to understand the complex flow structure around low sweep angle delta wings, which are frequently used in such vehicles.They are also interested in controlling the flight performance of these vehicles by various active and passive means. This study involves numerical simulations of flows around a delta wing with a sweep angle of 45oat hig...
Comparison of PEM Fuel Cell vs. Lithium-Sulfur Battery Systems for Unmanned Aerial Vehicles
Koku, Harun; Pala, Damla Eroğlu; Erişen, Nisa (2021-10-28)
Electrically powered unmanned aerial vehicles (UAVs) are gaining attention and attempts are underway to improvetheir performance in terms of weight, vibration, noise, emission and reliability. Fuel cells or batteries are commonlyused systems in these UAVs. In this study, the energy storage comparison between the Proton Exchange Membrane(PEM) fuel cell and the Lithium-Sulfur (Li-S) battery is performed for a 500W UAV to determine the appropriatedesign. While a commercial product is used for the mass predicti...
A comparative study of deep reinforcement learning methods and conventional controllers for aerial manipulation
Ünal, Kazım Burak; Kalkan, Sinan; Saranlı, Afşar; Department of Computer Engineering (2021-2-26)
Aerial manipulation with unmanned aerial vehicles is increasingly becoming a necessity in many applications. In this thesis, we analyze the controller approaches for a bi-rotor aerial manipulator for a pick and place operation. First of all, we compare a classical control approach with a minimum snap trajectory generation and Deep Reinforcement actor-critic algorithms for the control of the aerial manipulator. Furthermore, we examine the effects of degrees of freedom of the manipulator for the Deep Reinforc...
Citation Formats
A. Eroglu and E. Onur, “Revisiting Slotted ALOHA: Density Adaptation in FANETs,” WIRELESS PERSONAL COMMUNICATIONS, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: