A Wireless Relay Network Based on Unmanned Aircraft System With Rate Optimization

Ono, Fumie; Ochiai, Hideki; Miura, Ryu

doi:10.1109/twc.2016.2606388

Cited by 200 publications

(98 citation statements)

References 21 publications

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“…As fixedwing UAV must maintain a forward speed to remain airborne, the UAV was assumed to fly along a circle at a constant height and thus its location changes periodically. By considering DF relaying and delay-sensitive applications such that the UAV forwards the information as soon as it receives and decodes it, the authors in [100] derived the link outage probability by assuming Rician fading channel models. It was found that with the periodic circular UAV trajectory, the variable-rate communication outperforms the fixed-rate communication.…”

Section: B Performance Analysismentioning

confidence: 99%

Accessing From the Sky: A Tutorial on UAV Communications for 5G and Beyond

2019

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Unmanned aerial vehicles (UAVs) have found numerous applications and are expected to bring fertile business opportunities in the next decade. Among various enabling technologies for UAVs, wireless communication is essential and has drawn significantly growing attention in recent years. Compared to the conventional terrestrial communications, UAVs' communications face new challenges due to their high altitude above the ground and great flexibility of movement in the threedimensional (3D) space. Several critical issues arise, including the line-of-sight (LoS) dominant UAV-ground channels and resultant strong aerial-terrestrial network interference, the distinct communication quality of service (QoS) requirements for UAV control messages versus payload data, the stringent constraints imposed by the size, weight and power (SWAP) limitations of UAVs, as well as the exploitation of the new design degree of freedom (DoF) brought by the highly controllable 3D UAV mobility. In this paper, we give a tutorial overview of the recent advances in UAV communications to address the above issues, with an emphasis on how to integrate UAVs into the forthcoming fifth-generation (5G) and future cellular networks. In particular, we partition our discussions into two promising research and application frameworks of UAV communications, namely UAVassisted wireless communications and cellular-connected UAVs, where UAVs serve as aerial communication platforms and users, respectively. Furthermore, we point out promising directions for future research and investigation. KeywordsUnmanned aerial vehicle (UAV), wireless communication, cellular network, channel model, antenna model, energy efficiency, air-ground interference, 3D placement and trajectory, optimization. TechnologyDescription Advantages Disadvantages Direct linkDirect point-to-point communication with ground node Simple, low cost Limited range, low data rate, vulnerable to interference, non-scalable Satellite Communication and Internet access via satellite Global coverage Costly, heavy/bulky/energyconsuming communication equipment, high latency, large signal attenuation Ad-hoc network Dynamically self-organizing and infrastructure-free network Robust and adaptable, support for high mobility Costly, low spectrum efficiency, intermittent connectivity, complex routing protocol Cellular network Enabling UAV communications by using cellular infrastructure and technologies Almost ubiquitous accessibility, cost-effective, superior performance and scalability Unavailable in remote areas, potential interference with terrestrial communications and high reliability/throughput for both air-to-air and airto-ground wireless communications in the three-dimensional (3D) space. Towards this end, four candidate communication technologies are listed and compared in Table III, including i) direct link; ii) satellite; iii) ad-hoc network; and iv) cellular network. In the following, we discuss the advantages as well as limitations of each of these technologies in detail.1) Direct Link: Due to its simpli...

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Section: B Performance Analysismentioning

confidence: 99%

Accessing From the Sky: A Tutorial on UAV Communications for 5G and Beyond

2019

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“…This is not realistic, as the 228 UAV has to fly up and down consuming more energy. To avoid 229 this, one must average (7), (11), (12), (14) and (15) over the 230 time t. Our study shows that the time-averaged performance 231 of the mobile UAV is almost the same as the static UAV when 232 r U is less than 1000 meters. Thus, in the following, we only 233 present results for the static UAV, unless otherwise specified.…”

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confidence: 87%

“…For example, reference [12] proposed a 33 variable-rate approach to optimize the achievable rate for 34 a relaying UAV. Reference [13] that the power loss in the hop from the ground user to UAV 41 needs to be minimized.…”

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confidence: 99%

“…Also, compared 57 with [12]- [14], this work uses realistic UAV channel models 58 and fixes the UAV on top of the ground user to minimize the 59 power loss for the ground user, while [12]-[14] used standard 60 wireless channel models and the UAV was placed between 61 the ground user and the remote station. Moreover, this work 62 focuses on the reliability, while the previous works focused 63 on the capacity.…”

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Optimum Placement of UAV as Relays

2018

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“…AARs forms are used to estimate the capacity that are produced for four time periods of the operational day. Ground Delay Program estimates of duration and program AARs along with expected delays can be derived from the predicted AARs [5]. The general procedure used to determine a connection between weather forecast and airport capacity was:…”

Section: )Decision Support Tool For Predicting Aircraft Arrival Ratementioning

confidence: 99%

Forewarning Survey Weather Investigating for Aircraft System and Self-Supporting System

Simon¹,

M²,

Saranya.³

et al. 2017

IJERT

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Abstract--:As aircraft system needs a control command from the respective guide to land. In this paper, proposes a basic Wireless Sensor Network(WSN) based on weather monitoring system for aircraft system. The suggested frame work constitute of sensor WSN and it can be used in both short term real time incident management as well as long term strategic planning. This conceptual structure would use the IOT communication system and also yield low cost in real time monitoring system. Wireless sensor network is the system used to observe the temperature, humidity, and pressure values of aircraft system. Actually by establishing this sensor system we can monitor pressure values and can enter the values in web portal without any delay. By using this type of wireless sensor network a pilot can land the aircraft at a required place on a near by airport without any guideless given by the control head in control room. Hence it can intercept from accident.

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A Wireless Relay Network Based on Unmanned Aircraft System With Rate Optimization

Cited by 200 publications

References 21 publications

Accessing From the Sky: A Tutorial on UAV Communications for 5G and Beyond

Accessing From the Sky: A Tutorial on UAV Communications for 5G and Beyond

Optimum Placement of UAV as Relays

Forewarning Survey Weather Investigating for Aircraft System and Self-Supporting System

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