New Spectrum Bands for HAPS: Sharing with Fixed-Satellite Systems

Queiroz, Calil; Vieira, Robson D.; Barreto, André Noll; Zarrebini, Azar; Souza, Edgar; Linhares, Agostinho

doi:10.1109/vtcspring.2019.8746604

Cited by 6 publications

(10 citation statements)

References 6 publications

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“…Among them, the displacement of the platform requires a certain time, and power equipment is required to ensure that it can stay at a certain position for a period of time, in an attempt to provide time guarantee for the switching. In fact, the platform swings at a certain angular velocity at all times and cannot stay at an angle [27]. Therefore, the paper assumes that the HAPS platform swings back and forth at an angle As shown in Fig.…”

Section: Swing Effectmentioning

confidence: 99%

“…O. Anicho et al [16] believes that the displacement in the vertical direction is more prominent than the displacement in the horizontal direction in terms of system capacity and cell soft handover. C. Queiroz et al [17] discusses the impact of platform displacement on system performance under two multi-antenna mechanisms. Above literatures are based on the following two assumptions, that is, when the platform is unstable, the user can switch immediately without dropped calls.…”

Section: Introductionmentioning

confidence: 99%

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An Efficient Markov Chain Based Channel Model for 6G Enabled Massive Internet of Things

2021

KSII TIIS

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Accelerated by the Internet of Things (IoT), the need for further technical innovations and developments within wireless communications beyond the fifth generation (B5G) networks is up-and-coming in the past few years. High altitude platform station (HAPS) communication is expected to achieve such high levels that, with high data transfer rates and low latency, millions of devices and applications can work seamlessly. The HAPS has emerged as an indispensable component of next-generations of wireless networks, which will therefore play an important role in promoting massive IoT interconnectivity with 6G. The performance of communication and key technology mainly depend on the characteristic of channel, thus we propose an efficient Markov chain based channel model, then analyze the HAPS communication system's uplink capability and swing effect through experiments. According to the simulation results, the efficacy of the proposed scheme is proven to meet the requirements of ubiquitous connectivity in future IoT enabled by 6G.

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Section: Swing Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Efficient Markov Chain Based Channel Model for 6G Enabled Massive Internet of Things

2021

KSII TIIS

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“…Thus, ordinary smartphones can be used with HAPS mobile communications without modification. Extending frequency bands was discussed in the World Radiocommunication Conference 2019 (WRC-19) [17], and new bands, such as 24.25-27.5GHz, 37-43.5GHz, and 66-71GHz were identified as new global bands. Fig.…”

Section: Basic Concept Of Haps Systemmentioning

confidence: 99%

“…where g and h are the distance between the center of the HAPS and the center of each cell, and the height of the HAPS. The antenna tilt angle is given by tilt = arctan ℎ (17) Note that this geometrical approach can be defined for cell configurations with a single cell in the first layer, such as (1, N−1) and (1, M, N−M−1) configurations. Fig.…”

Section: B Performance Evaluationmentioning

confidence: 99%

System Design of Gigabit HAPS Mobile Communications

et al. 2020

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High-altitude platform stations (HAPSs) are expected to provide ultrawide-coverage areas and disaster-resilient networks from the stratosphere at around 20 km by installing wireless equipment on HAPS. Because their altitude is much lower than that of communications satellites, HAPSs can provide mobile communications services directly to smartphones, which are commonly used in terrestrial networks, such as fourth generation Long Term Evolution. Considering the widespread nature of mobile broadband communications and the importance as a backup line in case of disaster, HAPSs are expected to provide a large capacity in the future. A cellular system with single-cell frequency reuse using multiple cells similar to terrestrial mobile communications should be introduced to achieve such a capacity. The number of cells that a HAPS can accommodate ranges from 1 to more than 100, depending on unmanned aerial vehicle (UAV) ability. By contrast, the optimal cell configuration, which depends on the number of available cells, has not been clarified in previous research. In this paper, we propose an optimization method for the cell configuration for HAPS mobile communications using a genetic algorithm, which can be generally applied regardless of the number of cells and can clarify the optimal cell configuration. Although many cells are required to achieve gigabit-class HAPS mobile communications, the heightened power consumption due to the large number of cells is a critical problem for UAVs. Thus, we also investigate the reduction of the total transmission power and demonstrate the feasibility of energy-efficient gigabit HAPS mobile communications with wide coverage.

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“…Além disso, por se tratar de um canal de comunicação crítico de estação terrena TT&C, foi adotado um critério de proteção adotado mais restritivo, garantindo maior nível de proteção. Queiroz et al (39) desenvolveram um estudo de convivência entre o serviço de radiocomunicação em plataformas altas HAPS (High Altitude Platforms) e o Serviço Fixo por Satélite em ondas milimétricas. Neste estudo, foi utilizada a mesma ferramenta de simulação que o presente trabalho em questão (11), avaliando os efeitos de interferência agregada (I/N).…”

Section: Estudos De Convivência E a Proteção De Serviços Via Satéliteunclassified

Proteção de canal de comunicação crítico em sistema de controle de satélite por meio de cinturão de proteção

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New Spectrum Bands for HAPS: Sharing with Fixed-Satellite Systems

Cited by 6 publications

References 6 publications

An Efficient Markov Chain Based Channel Model for 6G Enabled Massive Internet of Things

An Efficient Markov Chain Based Channel Model for 6G Enabled Massive Internet of Things

System Design of Gigabit HAPS Mobile Communications

Proteção de canal de comunicação crítico em sistema de controle de satélite por meio de cinturão de proteção

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