Flocking of UAV Formation with Wireless Ultraviolet Communication

Zhao, Taifei; Xie, Ying; Xu, Shan; Jing, Wang; Wang, Hua

doi:10.1007/s11277-020-07489-7

Cited by 12 publications

(8 citation statements)

References 13 publications

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“…At present, several studies have investigated the UV physical (PHY) layer properties and point-to-point communication systems [4][5][6][7][8][9][10][11][12][13], but there are relatively few recent studies on UV networking, especially on UV media access control (MAC) protocol. The problem of multiuser interference in NLOS UV…”

Section: Introductionmentioning

confidence: 99%

“…INTRODUCTIONLTHOUGH traditional optical wireless communication (OWC) has the advantages of large capacity, high speed, and long-distance transmission, it is difficult to set up the required automatic pointing, acquisition, and tracking (PAT) system, which is unfavorable for fast networking in complex electromagnetic environments [1]. However, ultraviolet (UV) communication networks have excellent features, such as non-line-of-sight (NLOS) communication, strong anti-interference ability, and flexible operation, in addition to the utilization of UV optoelectronic parts with small sizes, low cost, light weight, and high reliability, which have enabled UV communications to gradually gain interest in wireless networking research [2,3].At present, several studies have investigated the UV physical (PHY) layer properties and point-to-point communication systems [4][5][6][7][8][9][10][11][12][13], but there are relatively few recent studies on UV networking, especially on UV media access control (MAC) protocol. The problem of multiuser interference in NLOS UV…”

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confidence: 99%

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Performance of the UV Multinode Network Under the Lossless Contention MAC Protocol

et al. 2022

IEEE Photonics J.

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Ultraviolet (UV) networks are important approaches to modern wireless communications owing to their unique characteristics, such as non-line-of-sight communication, strong anti-interference ability, and all-weather working mode. Given the lack of media access control (MAC) protocols suitable for UV networks at present, a novel UV lossless contention MAC (UVLLC-MAC) protocol is proposed herein based on UV physical properties. A fully connected finite-population multinode UV model is adopted, and its network performance is systematically derived and mathematically analyzed under the UVLLC-MAC protocol. Compared with the time-slot ALOHA protocol, the UVLLC-MAC protocol achieves 36.7% better throughputs, with 13.2% drop in packet loss rates, and the excellent performance of the protocol is obtained and fully verified. The UVLLC-MAC protocol can provide guidance for multinode and multiservice UV networking.Index Terms-multinode ultraviolet network, optical wireless communication, lossless contention access, media access control protocol. I. INTRODUCTIONLTHOUGH traditional optical wireless communication (OWC) has the advantages of large capacity, high speed, and long-distance transmission, it is difficult to set up the required automatic pointing, acquisition, and tracking (PAT) system, which is unfavorable for fast networking in complex electromagnetic environments [1]. However, ultraviolet (UV) communication networks have excellent features, such as non-line-of-sight (NLOS) communication, strong anti-interference ability, and flexible operation, in addition to the utilization of UV optoelectronic parts with small sizes, low cost, light weight, and high reliability, which have enabled UV communications to gradually gain interest in wireless networking research [2,3].At present, several studies have investigated the UV physical (PHY) layer properties and point-to-point communication systems [4][5][6][7][8][9][10][11][12][13], but there are relatively few recent studies on UV networking, especially on UV media access control (MAC) protocol. The problem of multiuser interference in NLOS UV

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Performance of the UV Multinode Network Under the Lossless Contention MAC Protocol

et al. 2022

IEEE Photonics J.

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“…In recent years, together with rapid developments of computer technology and communication engineering, the cooperative control of unmanned aerial vehicles (UAVs) has attracted widespread attention in many fields, and researchers have proposed many elegant methods on tracking control, formation contol, and so on (Li and Fang, 2021; Yuan et al, 2022; Zhao et al, 2020) Since the UAV system can be modeled as a kind of typical multi-agent systems (MASs), then the cooperative formation control for the MASs has important reference value. Chen et al (2021) investigated the leader-follower state consensus problem for heterogeneous linear MASs under fixed directed communication topologies.…”

Section: Introductionmentioning

confidence: 99%

Dynamic event-triggered formation control for UAVs under communication delay and outside disturbances

Liao

et al. 2023

Transactions of the Institute of Measurement and Control

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This work presents a dynamic event-triggered sliding mode controller to solve the problem on cooperative formation flight for unmanned aerial vehicles (UAVs) under outside disturbances and communication delay. Initially, a second-order kinematic model for each UAV is established, and the leader-follower framework is adopted to realize the desired formation flight. Second, an effective design of disturbance observer is proposed based on that the disturbance in the UAV is generated by an external nonlinear system. Third, a new dynamic event-triggered mechanism (DETM) is presented and the triggering threshold is adjusted by an exogenous system, which can help reduce data transmissions and maintain control performance more efficiently. Then, a distributed dynamic event-triggered sliding mode control strategy is proposed for the UAV system, and two sufficient conditions on exponential stability of the overall closed-loop system are derived. Furthermore, the controller gain, observer gain, and triggering parameter can be obtained by solving the derived linear matrix inequalities (LMIs). Finally, a simulated example is exploited to illustrate the obtained results.

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“…UV photodetectors (PDs) have been widely used in civil and military applications, such as optical communication, [ 1–3 ] high‐voltage corona detection, [ 4,5 ] ozone layer monitoring, [ 5,6 ] flame sensing, [ 7,8 ] and missile plume detection. [ 9 ] Nowadays, high‐performance UV PDs have to meet the “5S” requirements, i.e., high sensitivity , high speed , high signal‐to‐noise ratio , high spectrum selectivity , and high stability .…”

Section: Introductionmentioning

confidence: 99%

Self‐Powered and Spectrally Distinctive Nanoporous Ga₂O₃/GaN Epitaxial Heterojunction UV Photodetectors

Chen

Zhang

et al. 2021

Advanced Photonics Research

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Herein, self‐powered spectrally distinctive UV photodetectors (PDs) based on nanoporous epitaxial Ga2O3/GaN heterojunctions grown by metalorganic chemical vapor deposition (MOCVD) are reported. The nanoporous structures are formed by a novel self‐reactive etching (SRE) method, which significantly enhances the device performance. PDs with different porosities are fabricated and compared. In the self‐powered mode, the PD with the highest nanopore porosity exhibits the best performance, with an ultralow dark current of 0.04 nA, a fast photoresponse speed, and a high responsivity of 43.9 mA W−1 (35.8 mA W−1) under 254 nm (365 nm) illumination, which is 800% higher than that of the reference device without the porous structure. Furthermore, opposite current polarities are observed in the PDs under different illumination spectra, the mechanism of which is explained by the carrier transportation using the device band diagrams. This phenomenon can be used to distinguish different incident spectra, opening the door to more new applications. This work represents one of the first spectrally distinctive self‐powered UV PDs based on nanoporous Ga2O3/GaN heterojunctions and significantly benefits the development of multifunctional UV PDs.

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Flocking of UAV Formation with Wireless Ultraviolet Communication

Cited by 12 publications

References 13 publications

Performance of the UV Multinode Network Under the Lossless Contention MAC Protocol

Performance of the UV Multinode Network Under the Lossless Contention MAC Protocol

Dynamic event-triggered formation control for UAVs under communication delay and outside disturbances

Self‐Powered and Spectrally Distinctive Nanoporous Ga₂O₃/GaN Epitaxial Heterojunction UV Photodetectors

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Flocking of UAV Formation with Wireless Ultraviolet Communication

Cited by 12 publications

References 13 publications

Performance of the UV Multinode Network Under the Lossless Contention MAC Protocol

Performance of the UV Multinode Network Under the Lossless Contention MAC Protocol

Dynamic event-triggered formation control for UAVs under communication delay and outside disturbances

Self‐Powered and Spectrally Distinctive Nanoporous Ga2O3/GaN Epitaxial Heterojunction UV Photodetectors

Contact Info

Product

Resources

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Self‐Powered and Spectrally Distinctive Nanoporous Ga₂O₃/GaN Epitaxial Heterojunction UV Photodetectors