Non-line-of-sight ultraviolet single-scatter path loss model

Liu, Chuanhui; Lu, Faping; Kang, Jiafang; Zhongyang, Mao; Li, Bifeng

doi:10.1007/s11107-017-0737-5

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…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%

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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confidence: 99%

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

et al. 2022

IEEE Photonics J.

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“…The bitrate value was taken to be R=1 Mbps for calculating Figure 7 and 8 curves. Based on expressions (11) and (8), were calculated the dependences of BER on the azimuthal deviation Δψ, shown in Figures 11-13. The bitrate is assumed to be R=100 kbps.…”

Section: Results Of Modelingmentioning

confidence: 99%

“…The standard geometry of the UV channel model in the non-line-of-sight mode (NLOS UV) used in a large number of works, for example, [9][10][11], is shown in Figure 1a the channel and is designated: Тх is the transmitter, Rx is the receiver, r is the distance between Tx and Rx, θ1,2 and φ1,2 is the elevation angle and width of the DP, index 1 refers to the transmitter, index 2 to the receiver, θs is the scattering angle, V is the total volume of Tx and Rx radiation patterns, r1,2 is the distance from Tx and Rx to the center of region V.…”

Section: Geometry Of Uv Nlos Channelmentioning

confidence: 99%

AUV Link Mobile Ad-Hoc Network Examination

Konstantinov¹,

Vasyliev²,

Kuzichkin³

et al. 2019

IJEAT

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Wireless optical communication systems allow reliable communication in the ultraviolet (UV) range, and protected from intentional suppression and interception, both in the presence and in the absence of direct visibility between the transmitter and the receiver. Currently, the actual and insufficiently explored direction is the development and research of mobile ad-hoc networks (MANET) with a UV communication channel. To analyze the capacity of a mobile network of UV communications with different spatial orientation of network nodes, it is necessary to take into account not only their coordinates and elevation angles but also azimuths. NLOS UV bandwidth models have been developed using three types of modulation: on-off keying (OOK), pulse-phase modulation (PPM), digital pulse interval modulation (DPIM) with a different number of guard intervals. The noted advantages of DPIM, which are most important for the implementation of a mobile self-organizing network with a UV channel, are: it does not require symbolic synchronization of the transmitter and receiver, it requires a smaller frequency band compared to PPM, it has a higher energy efficiency compared to OOK. A parametric approximation of losses in the NLOS UV channel has been performed, taking into account the azimuthal deviations of the transmitter and receiver for specific parameters of the communication system. Has been done a performance simulation of the MANET network with an ultraviolet communication channel Has been calculated values of the bit error rate (BER), and bit rate for a system with different types of modulation with low, medium, and high noise levels in the channel. With the use of parametric approximation of losses in the channel, are analyzed the BER and the bitrate of the UV communication system with an azimuthal deviation within 30 degrees. Based on the obtained simulation results, prospects for the further development of mobile self-organizing networks with a UV channel are indicated to improve their reliability and performance.

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“…These networks can be applied to military networks, emergency services, disaster recovery, and other complex electromagnetic environments due to their excellent non-line-of-sight (NLOS) communication, high security, and all-weather operation [2]. The secure properties of UV networks include strong anti-interference abilities, good confidentiality, and low position resolutions [3]; thus, they have recently become a research hotspot [4]. Unfortunately, high-power UV light sources cause damage to the eyes and skin; therefore, the power of the light source should be strictly controlled according to safety regulations [5].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Clustering MAC Protocol Based on Learning Automata for UV Networks

Li,

Xu,

Wang

et al. 2024

Photonics

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Ultraviolet (UV) networks are widely applied in complex electromagnetic environments. Designing an efficient multi-node medium access control (MAC) protocol for these networks is important. In this study, we proposed an enhanced clustering time division multiple access (TDMA) MAC protocol based on clustering and learning automata (LA). Subsequently, the effects of the network topology, class of service, and number of cluster nodes on the network performance under the proposed protocol were analyzed. Then, the protocol was compared with the TDMA protocol and clustering system. Results revealed that it obtained a better network performance, proving its suitability for multi-node UV networking.

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Non-line-of-sight ultraviolet single-scatter path loss model

Cited by 5 publications

References 25 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

AUV Link Mobile Ad-Hoc Network Examination

Enhanced Clustering MAC Protocol Based on Learning Automata for UV Networks

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