Comparison of Communication Viewsheds Derived from High-Resolution Digital Surface Models Using Line-of-Sight, 2D Fresnel Zone, and 3D Fresnel Zone Analysis

Baek, Jieun; Choi, Yosoon

doi:10.3390/ijgi7080322

Cited by 8 publications

(3 citation statements)

References 43 publications

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“…However, electromagnetic waves do not propagate only in a straight line. In reality, an ellipsoidal communication space called a Fresnel zone is formed between the transmitter and receiver owing to refraction [26]. Therefore, in the future, we plan to conduct additional research on communicable areas and improve the algorithm by considering refraction phenomena.…”

Section: Discussionmentioning

confidence: 99%

Three-Dimensional Model-Based Line-of-Sight Analysis for Optimal Installation of IoT Monitoring Devices in Underground Mines

Lee,

Han,

Kim

2023

Applied Sciences

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Internet of things (IoT)-based wireless communication technology has been applied for efficient work and safety in mines. However, underground mines are surrounded by walls and have numerous curves, which reduce communication stability. For smooth communication between devices, a line of sight (LOS) must be connected without obstacles. If optimal installation locations in a virtual space can be confirmed before installing the device in the field, trial and error can be avoided. In this study, a 3D model-based LOS analysis technology was developed using Python and a ray-casting algorithm. A place with numerous LOS connections has good communication with other places; consequently, it is a suitable location to install the device. To indicate the degree of communication smoothness, a smooth communication index was proposed. A preliminary experiment was conducted in an indoor space within the Samcheok Campus of the Kangwon National University, and a field experiment was conducted at the Samdo Mine in Dogye-eup, Samcheok-si, Gangwon-do. Based on these results, an effective wireless sensor network (WSN) was established by installing a ZigBee-based monitoring device. The results of this study can be further improved and used for constructing smooth WSNs in underground mines in the future.

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Section: Discussionmentioning

confidence: 99%

Three-Dimensional Model-Based Line-of-Sight Analysis for Optimal Installation of IoT Monitoring Devices in Underground Mines

Lee,

Han,

Kim

2023

Applied Sciences

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“…Shrestha and Panday [42] improved on R3. Baek and Choi [4] compared different viewshed algorithms, using factors such as a 3D Fresnel zone. Efrat et al [9] used visibility to pursue moving evaders.…”

Section: Fig 5 Us East Terrainmentioning

confidence: 99%

Siting thousands of radio transmitter towers on terrains with billions of points

Franklin,

de Magalhães,

2020

Preprint

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This paper presents a system that sites (finds optimal locations for) thousands of radio transmitter towers on terrains of up to two billion elevation posts. Applications include cellphone towers, camera systems, or even mitigating environmental visual nuisances.The transmitters and receivers may be situated above the terrain. The system has been parallelized with OpenMP to run on a multicore CPU.

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“…In this study, a 3D Fresnel zone analysis [56] was used to quantitatively calculate the 3D Fresnel index by considering the effects of the terrain in the 3D partial Fresnel zone between a transmitter and receiver ( Figure 3). To conduct a 3D Fresnel zone analysis, the following is required: a DSM that includes the terrain dataset of the mine, a transmitter map indicating candidate locations, a receiver map displaying the desired signal reception area, wavelengths of the signals, elevations of the transmitters, and elevations of receivers.…”

Section: Calculating the 3d Fresnel Indexmentioning

confidence: 99%

A New GIS-Based Algorithm to Support Initial Transmitter Layout Design in Open-Pit Mines

Baek

Choi

2018

Energies

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In this paper, a new geographic information systems (GIS)-based algorithm is proposed for supporting the initial design of a wireless communications system in open-pit mines. In this algorithm, multiple candidate transmitter (wireless access point) locations are selected considering the probability of further development and environmental factors in the mine. Then, a three-dimensional (3D) partial Fresnel zone between the transmitter and the receiver is defined and its 3D Fresnel index calculated by communication viewshed analysis of topographic data. The initial design for a transmitter layout is then determined based on the 3D Fresnel indices, which are calculated for all candidate transmitter locations. The proposed algorithm was applied to an open-pit mine located in Samcheok-si, Gangwon-do, South Korea. The 3D Fresnel indices were calculated for 15 candidate transmitter locations, and an initial transmitter layout then designed considering favorable combinations of two, three, and four transmitters. The proposed algorithm provided more precise Fresnel index overlay maps for the favorable transmitter candidate combinations than other algorithms based on line-of-sight and two-dimensional partial Fresnel zone analyses. Application of the algorithm to an open-pit mine where a wireless communications system is already installed revealed that the initial transmitter layout design is acceptable in terms of providing reasonable information on the coverage area of transmitters. Because the proposed algorithm provides an initial transmitter layout that can be modified after field investigations, it can support efficient design of wireless communications systems for use in open-pit mines.

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Comparison of Communication Viewsheds Derived from High-Resolution Digital Surface Models Using Line-of-Sight, 2D Fresnel Zone, and 3D Fresnel Zone Analysis

Cited by 8 publications

References 43 publications

Three-Dimensional Model-Based Line-of-Sight Analysis for Optimal Installation of IoT Monitoring Devices in Underground Mines

Three-Dimensional Model-Based Line-of-Sight Analysis for Optimal Installation of IoT Monitoring Devices in Underground Mines

Siting thousands of radio transmitter towers on terrains with billions of points

A New GIS-Based Algorithm to Support Initial Transmitter Layout Design in Open-Pit Mines

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