RF Propagation in Mines and Tunnels: Extensive measurements for vertically, horizontally, and cross-polarized signals in mines and tunnels

Zhou, Chenming; Plass, Timothy; Jacksha, Ronald; Waynert, J. A.

doi:10.1109/map.2015.2453881

Cited by 49 publications

(50 citation statements)

References 33 publications

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“…After a measurement campaign, we discovered that the RSSI falls abruptly as soon as the line‐of‐sight is lost, which often implies the loss of connection. Other authors (Zhou et al, ) have also noticed the same effect, that is, more pronounced for higher frequencies. The obvious solution to this problem is to maintain the line‐of‐sight between consecutive nodes.…”

Section: Setting Up An Intervention Teamsupporting

confidence: 58%

“…In the positions where the interference is destructive, there is a strong signal decay, the so‐called fadings. At first, the near and far sectors can be distinguished (see Figure ); Dudley, Lienard, Mahmoud, & Degauque, ; Zhou, Plass, Jacksha, & Waynert, ). In the near sector, rapid fluctuations of the signal, or fast fadings, appear.…”

Section: Setting Up An Intervention Teammentioning

confidence: 99%

See 1 more Smart Citation

Ground robotics in tunnels: Keys and lessons learned after 10 years of research and experiments

Tardioli

Riazuelo

Sicignano

et al. 2019

Journal of Field Robotics

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The work reported in this article describes the research advances and the lessons learned by the Robotics, Perception and Real-Time group over a decade of research in the field of ground robotics in confined environments. This study has primarily focused on localization, navigation, and communications in tunnel-like environments. As will be discussed, this type of environment presents several special characteristics that often make well-established techniques fail. The aim is to share, in an open way, the experience, errors, and successes of this group with the robotics community so that those that work in such environments can avoid (some of) the errors made. At the very least, these findings can be readily taken into account when designing a solution, without needing to sift through the technical details found in the papers cited within this text.

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Section: Setting Up An Intervention Teamsupporting

confidence: 58%

Section: Setting Up An Intervention Teammentioning

confidence: 99%

Ground robotics in tunnels: Keys and lessons learned after 10 years of research and experiments

Tardioli

Riazuelo

Sicignano

et al. 2019

Journal of Field Robotics

View full text Add to dashboard Cite

show abstract

“…Our proposed method has a limitation that it assumes reliable communication can be established only on the basis of line of sight and estimated reliable communication distance . However, as per literature [11], [12], [14], [38] wave propagation patterns in underground mine galleries are similar to waveguides, and even in non-line of sight situation, around the corners, wireless coverage is there. In such case if we have a model that can accurately predict the coverage or a particular relay node, then we can model ( , ) predicate in a manner that it includes all the possible pairs of candidate positions between which wireless communication is possible.…”

Section: Discussionmentioning

confidence: 60%

“…Unlike most other domestic application sites of WSN deployment, there are some additional challenges of establishing wireless communication infrastructure in underground room and pillar mines. In room and pillar working districts signal waves cannot penetrate through the pillars, and the wave propagation characteristic is also different in case of underground mines due to uneven walls of underground openings [10][11][12][13][14]. This is why for reliable wireless communication within underground mines, preferred means of wireless communication is within line of sight and up to a limited distances only.…”

Section: Introductionmentioning

confidence: 99%

Wireless relay placement optimization in underground room and pillar mines

Halber¹,

Chakravarty²

2018

MMEP

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For the implementation of real-time underground monitoring, communication and tracking, the deployment of wireless communication backbone inside underground mines has got the attention of the researchers in the recent decade. For wireless system deployment in the permanent structure of underground mines, wired communication backbones are appropriate as permanent districts serve for a longer time. However, for temporary openings where service life is for few months or weeks, communication backbone with wireless relay nodes may come out to be more economical as wireless relay nodes give flexibility with deployment, rearrangement and easy retreat. In recent literature multiple approaches of optimal relay node placements are available. However, the choice of best approach for an application is dependent on the specific requirement and constraints of that particular application site. This paper, we discuss on necessary requirements and constraints of wireless relay placement planning in an underground room and pillar mines. Considering the requirements and constraints that are discussed, an optimization approach for wireless relay placement in an underground room and pillar mines using network theory has been proposed in this paper.

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“…Radio Propagation model through the tunnel. The radio propagation behaviour in the tunnel-like environment has been studied and reported in the literature [18][19][20][21]. Next there are several distributions for modelling the wave path loss; namely, Rayleigh, Nakagami, Rice, Weibull and log-normal shadowing are among the most commonly used models.…”

Section: Figure 1 Overview Of the Methodologymentioning

confidence: 99%

Investigation of wireless tracking performance in the tunnel-like environment with particle filter

Halder¹,

Chakravarty²

2018

MMEP

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When the basic nonlinear filtering problem for dynamic systems is considered, in such case, the particle filter is one of the suitable methods that has perhaps become one of the most commonly used methods in recent years. Positioning or localization falls under such a nonlinear filtering problem. Positioning is a matter of interest for both domestic and industrial application, due to its potential use in wide range of context-aware services that it can enable by leveraging the Internet of Things approach. However, in areas where GPS signals are not available such as underground tunnel roadways, where the localization is done mostly using radio beacons. This study mathematically simulates tracking operation in such a tunnel-like situation and studied the position estimation by the particle filter. From the results, we were able to visualize how varying different configuration parameters affect the estimation accuracies and also get an idea of worst-case estimates by seeing its standard deviation of estimated positions for different instances of repeated experiments. And our results also confirmed that deploying additional beacons have a contribution to the improvement in error tolerance. However, the improvements are significantly notable only around the point where beacon has been added. When the basic nonlinear filtering problem for dynamic systems is considered, in such case, the particle filter is one of the suitable methods that has perhaps become one of the most commonly used methods in recent years. Positioning or localization falls under such a nonlinear filtering problem. Positioning is a matter of interest for both domestic and industrial application, due to its potential use in wide range of context-aware services that it can enable by leveraging the Internet of Things approach. However, in areas where GPS signals are not available such as underground tunnel roadways, where the localization is done mostly using radio beacons. This study mathematically simulates tracking operation in such a tunnel-like situation and studied the position estimation by the particle filter. From the results, we were able to visualize how varying different configuration parameters affect the estimation accuracies and also get an idea of worst-case estimates by seeing its standard deviation of estimated positions for different instances of repeated experiments. And our results also confirmed that deploying additional beacons have a contribution to the improvement in error tolerance. However, the improvements are significantly notable only around the point where beacon has been added.

show abstract

RF Propagation in Mines and Tunnels: Extensive measurements for vertically, horizontally, and cross-polarized signals in mines and tunnels

Cited by 49 publications

References 33 publications

Ground robotics in tunnels: Keys and lessons learned after 10 years of research and experiments

Ground robotics in tunnels: Keys and lessons learned after 10 years of research and experiments

Wireless relay placement optimization in underground room and pillar mines

Investigation of wireless tracking performance in the tunnel-like environment with particle filter

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