Simulation and Analysis of Device Positioning in 5G Ultra-Dense Network

Liu, Qirui; Liu, Rongke; Wang, Zijie; Zhang, Yifan

doi:10.1109/iwcmc.2019.8766743

Cited by 34 publications

(19 citation statements)

References 7 publications

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“…This poor satellite geometry leads to unsatisfactory accuracy and reliability in the across-valley direction. Cellularbased positioning has the same limitations as GNSS [14], including insufficient numbers of available base stations (BSs), unfavorable geometry of BSs, and NLoS propagation. To make matters worse, since the elevation angles of terrestrial BSs are generally much lower than those of GNSS satellites, cellular signals are more likely to experience NLoS propagation than GNSS signals [15].…”

Section: A Motivationmentioning

confidence: 99%

Toward Reliable UAV-Enabled Positioning in Mountainous Environments: System Design and Preliminary Results

Wang

Liu

et al. 2022

IEEE Trans. Rel.

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Reliable positioning services are extremely important for users in mountainous environments. However, in such environments, the service reliability of conventional wireless positioning technologies is often disappointing due to frequent nonline-of-sight (NLoS) propagation and poor geometry of available anchor nodes. Hence, we propose a unmanned aerial vehicle (UAV)-enabled positioning system that utilizes UAV's mobility to overcome the above challenges. In this article, we first analyze and model the major causes of service failures in the proposed system. In particular, a geometry-based NLoS probability model is established based on the digital elevation models (DEM) of realistic terrain for reliability analysis. Subsequently, we propose a reliability prediction method and derive the corresponding metric to evaluate the system's ability to provide reliable positioning services. Moreover, we also develop a voting-based method for the further enhancement of service reliability. Monte-Carlo simulations show that in mountainous environments, the proposed reliability prediction method could achieve a prediction accuracy that is at least 36.8% higher than that of the existing technique. In addition, in the experiments conducted in two typical valley scenarios, the proposed reliability enhancement method improves the service reliability of the proposed system by 23% and 29%, respectively. These numerical results demonstrate the strong potential of the proposed system and methods for reliable positioning.

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Section: A Motivationmentioning

confidence: 99%

Toward Reliable UAV-Enabled Positioning in Mountainous Environments: System Design and Preliminary Results

Wang

Liu

et al. 2022

IEEE Trans. Rel.

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“…The J2U jamming link is a typical Ground-to-Ground (G2G) channel. Since the jammer is close to the UE, the J2U link is assumed to be dominated by the LoS component [21], and its average path loss can be expressed as…”

Section: Tdoa Positioning Services For Uementioning

confidence: 99%

Feasibility Study of UAV-Assisted Anti-Jamming Positioning

Wang

Liu

et al. 2021

IEEE Trans. Veh. Technol.

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As the cost and technical difficulty of jamming devices continue to decrease, jamming has become one of the major threats to positioning service. Unfortunately, most conventional wireless positioning technologies are vulnerable to jamming attacks due to inherent shortcomings like weak signal strength and unfavorable anchor geometry. Thanks to their high operational flexibility, unmanned aerial vehicles (UAVs) could be a promising solution to the above challenges. Therefore, in this article, we propose a UAV-assisted anti-jamming positioning system, in which multiple UAVs first utilize time-difference-ofarrival (TDoA) measurements from ground reference stations and double-response two-way ranging (DR-TWR) measurements from UAV-to-UAV links to perform self-localization as well as clock synchronization, and then act as anchor nodes to provide TDoA positioning service for ground users in the presence of jamming. To evaluate the feasibility and performance of the proposed system, we first derive the Cramér-Rao lower bound (CRLB) of UAV self-localization. Then, the impacts of UAV position uncertainty and synchronization errors caused by jamming on positioning service are modeled, and the theoretical root-mean-square error (RMSE) of user position estimate is further derived. Numerical results demonstrate that the proposed system is a promising alternative to existing positioning systems when their services are disrupted by jamming. The most notable advantage of the proposed system is that it is fully compatible with existing user equipment terminals and positioning methods. Index Terms-Unmanned aerial vehicle (UAV), anti-jamming positioning, time-difference-of-arrival (TDoA), double-response two-way ranging (DR-TWR).

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“…De acordo com [17] e [18], há ainda muito a ser explorado no que se refere à localização do dispositivo móvel usando apenas a rede celular: é necessário melhorar a precisão na localização bem como também aperfeiçoar ou desenvolver novas técnicas de localização e rastreamento, principalmente em ambiente indoor.…”

Section: Trabalhos Relacionadosunclassified

Posicionamento em Ambientes Internos nas Redes 5G: um Auxílio para Deficientes Visuais

Conceição¹,

Rocha²

2021

Anais Do XXXIX Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

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Resumo-Localizar o dispositivo móvel em uma rede celular pode ter diversas aplicações, como auxiliar na locomoção dos deficientes visuais, proporcionando maior qualidade de vida. Embora o GPS (Global Positioning System) proporcione uma boa precisão para localização, em ambientes internos ele perde a linha de visada direta com os satélites, degradando a precisão. As redes móveis de quinta geração apresentam características que podem melhorar a precisão de localização do dispositivo. Este trabalho apresenta uma abordagem para o pré-processamento da localização em ambientes internos usando parâmetros determinados a partir de uma transmissão em rede 5G e formulações geométricas de uma propagação em ambiente NLoS (Non-Line-of-Sight).

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Simulation and Analysis of Device Positioning in 5G Ultra-Dense Network

Cited by 34 publications

References 7 publications

Toward Reliable UAV-Enabled Positioning in Mountainous Environments: System Design and Preliminary Results

Toward Reliable UAV-Enabled Positioning in Mountainous Environments: System Design and Preliminary Results

Feasibility Study of UAV-Assisted Anti-Jamming Positioning

Posicionamento em Ambientes Internos nas Redes 5G: um Auxílio para Deficientes Visuais

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