Coverage Analysis of Hybrid RF/THz Networks With Best Relay Selection

Lou, Zhengying; Belmekki, Baha Eddine Youcef; Alouini, Mohamed‐Slim

doi:10.1109/lcomm.2023.3267900

Cited by 16 publications

(10 citation statements)

References 14 publications

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“…In the one-to-many scenario, the backhaul link between the UAV and the base station from the core network bears the sum of data rates for all users [46]. For base stations with heights lower than buildings, UAVs can also ensure that the backhaul link is not blocked by employing realtime search methods.…”

Section: B Backhaulmentioning

confidence: 99%

Exploring UAV Networking From the Terrain Information Completeness Perspective: A Tutorial

Lou,

Wang,

Belmekki

et al. 2024

IEEE Open J. Veh. Technol.

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Terrain information is a crucial factor affecting the performance of unmanned aerial vehicle (UAV) networks. As a tutorial, this article provides a unique perspective on the completeness of terrain information, summarizing and enhancing the research on terrain-based UAV deployment. In the presence of complete terrain information, two highly discussed topics are UAV-aided map construction and dynamic trajectory design based on maps. We propose a case study illustrating the mutually reinforcing relationship between them. When terrain information is incomplete, and only terrain-related feature parameters are available, we discuss how existing models map terrain features to blockage probabilities. By introducing the application of this model with stochastic geometry, a case study is proposed to analyze the accuracy of the model. When no terrain information is available, UAVs gather terrain information during the real-time networking process and determine the next position by collected information. This real-time search method is currently limited to relay communication. In the case study, we extend it to a multi-user scenario and summarize three trade-offs of the method. Finally, we conduct a qualitative analysis to assess the impact of three factors that have been overlooked in terrain-based UAV deployment.

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Section: B Backhaulmentioning

confidence: 99%

Exploring UAV Networking From the Terrain Information Completeness Perspective: A Tutorial

Lou,

Wang,

Belmekki

et al. 2024

IEEE Open J. Veh. Technol.

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“…The terahertz (THz) band enables ultra-high data rates [22]. THz communications, typically ranging from 0.1 to 10 THz, are gaining attention for their potential to support extremely high-speed data transmission, significantly surpassing current wireless technologies.…”

Section: ) Terahertzmentioning

confidence: 99%

“…However, its effectiveness diminishes outdoors, where ambient sunlight interferes with access signals and its short-range communication becomes a significant limitation. In contrast, for outdoor scenarios, HAPS emerge as a potential solution to provide the necessary extreme high data rates, utilizing THz frequencies [22]. They can serve dual roles depending on the environment: as direct access platforms offering clear LOS communications in suburban areas, or as backhaul platforms supporting other infrastructures like UAVs in densely populated urban settings.…”

Section: ) Ubiquitous Virtual Environmentmentioning

confidence: 99%

Cellular Network From the Sky: Toward People-Centered Smart Communities

Belmekki,

Aljohani,

Althubaity

et al. 2024

IEEE Open J. Commun. Soc.

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The concept of the smart city relies on connectivity and is expected to revolutionize urban living and create sustainable cities. However, while smart cities continue to evolve, small towns, suburbs, and villages lack basic communication infrastructure. This phenomenon exacerbates inequality and perpetuates a growing digital divide. Hence, it is imperative to also concentrate on these communities by designing strategies to extend essential services to them and drive the development of smart communities. High-altitude platform stations (HAPS) are a key enabling technology for such a concept. They fly in the stratosphere and offer extensive connectivity coverage, are cost-effective, and powered by solar energy and hydrogen. To demonstrate the potential of HAPS in enabling smart communities, the world's first-ever fifth-generation (5G) trial using HAPS was conducted. The experiment showed that HAPS provided high data rates and ubiquitous 5G coverage from the stratosphere in different scenarios. The main requirements of smart communities, such as ensuring equity and inclusion, intelligent transportation systems, and a blue economy were successfully addressed. We also highlight the main benefits of HAPS in enabling smart communities, as well as the involvement of communities in the co-design of such solutions. Finally, additional applications are presented, along with the main key enabling technologies.INDEX TERMS High-altitude platform stations, HAPS, smart cities, smart communities, 5G trial, nonterrestrial networks.

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“…Specifically, for any location, the average number of satellites within a given region is directly proportional to the area of this region [25]. As the distribution of BPP is independent of position, the distribution of satellites should appear uniform from any point of view [26].…”

Section: A Network Topologymentioning

confidence: 99%

“…• Maximum stepsize: the satellite within the communication range and closest to the receiver is selected as the next hop [26].…”

Section: Strategy Comparisonmentioning

confidence: 99%

Stochastic Geometry-Based Low Latency Routing in Massive LEO Satellite Networks

Wang

Kishk

Alouini

2022

IEEE Trans. Aerosp. Electron. Syst.

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In this paper, the routing in massive low earth orbit (LEO) satellite networks is studied. When the satellite-tosatellite communication distance is limited, we choose different relay satellites to minimize the latency in a constellation at a constant altitude. Firstly, the global optimum solution is obtained in the ideal scenario when there are available satellites at all the ideal locations. Next, we propose a nearest neighbor search algorithm for realistic (non-ideal) scenarios with a limited number of satellites. The proposed algorithm can approach the global optimum solution under an ideal scenario through a finite number of iterations and a tiny range of searches. Compared with other routing strategies, the proposed algorithm shows significant advantages in terms of latency. Furthermore, we provide two approximation techniques that can give tight lower and upper bounds for the latency of the proposed algorithm, respectively. Finally, the relationships between latency and constellation height, satellites' number, and communication distance are investigated.

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Coverage Analysis of Hybrid RF/THz Networks With Best Relay Selection

Cited by 16 publications

References 14 publications

Exploring UAV Networking From the Terrain Information Completeness Perspective: A Tutorial

Exploring UAV Networking From the Terrain Information Completeness Perspective: A Tutorial

Cellular Network From the Sky: Toward People-Centered Smart Communities

Stochastic Geometry-Based Low Latency Routing in Massive LEO Satellite Networks

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