Automatic realignment with electronic steering of free-space-optical transceivers in MANETs: A proof-of-concept prototype

Sevincer, Abdullah; Bilgi, Mehmet; Yüksel, Murat

doi:10.1016/j.adhoc.2012.08.004

Cited by 20 publications

(7 citation statements)

References 23 publications

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“…FSOC can provide a higher bandwidth channel for transferring large volumes of data. It has shown the ability to reach modulation speeds up to 10 Gbps [2] easily. It can also provide connectivity in conditions that are unfavorable for RF communication and has low probability of interception and detection [3].…”

Section: Introductionmentioning

confidence: 99%

Maintaining a free-space-optical communication link between two autonomous mobiles

Khan

Yüksel

2014

2014 IEEE Wireless Communications and Networking Conference (WCNC)

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Free-Space-Optical (FSO) communication has the potential to not only deliver wireless communication links at optical-level speeds but also solve the wireless capacity problem that the traditional RF based technologies are confronting. Despite its advantages, FSO communication is prone to mobility. The highly directional FSO transceivers require establishment and maintenance of line-of-sight (LOS) between them. Facilitating continuous alignment requirements has been a major concentration of mobile FSO research to date. We consider two autonomous mobile nodes, each with one FSO transceiver mounted on a movable head capable of rotating 360 degrees. We propose a novel scheme that deals with the problem of automatic detection, establishment and maintenance of LOS alignment between the two nodes with mechanical steering of the FSO transceivers. The proposed method shows that using such mechanically steerable transceivers and a simple autoalignment mechanism, it is possible to maintain optical wireless links in a mobile setting with nominal disruption.

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Section: Introductionmentioning

confidence: 99%

Maintaining a free-space-optical communication link between two autonomous mobiles

Khan

Yüksel

2014

2014 IEEE Wireless Communications and Networking Conference (WCNC)

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“…A number of studies have examined misalignment mitigation [19][20][21][22], building sway [19,23], platform vibrations [24,25], and pointing, acquisition, and tracking (PAT) [14,[26][27][28] for fixed terrestrial FSO links. Some PAT algorithms have also been designed for use in satellite [29], air-to-air (A2A) [30], air-to-ground (A2G) [31] or ground-to-ground (G2G) [9,[32][33][34] mobile FSO links.…”

mentioning

confidence: 99%

“…Among them is replacing mechanical switching with fast optical switching using fiber bundles combined with optical arrays in [9][10][11]. LEDs, VCSELs, and photo-diodes have been used to construct a multi-transceiver spherical array [12][13][14]. The array-shaped FSO transceivers, whether fiber bundles, LEDs, micro-mirrors, etc., proved promising by offering increased field-of-view and diversity-ready performance [14][15][16][17].…”

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confidence: 99%

Multielement FSO Transceivers Alignment for Inter-UAV Communications

Kaadan

Refai

LoPresti

2014

J. Lightwave Technol.

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Given the increased interest in aerial communications, Free-space Optics (FSO) has gained considerable attention for its ability to deliver wider bandwidth, license-free and secure communication. FSO was initially developed for fixed platforms. As such, the current push to introduce mobility is one of the greatest challenges for FSO developers. This paper presents the first open-loop alignment/stability analysis of hovering multirotors proven to maintain an FSO link despite inherent instability. Communication distance, wavelength, and platform deviation are among the many parameters evaluated in our model. We characterize fiber-bundle transceivers, as an example of optical arrays, and their applicability to aerial FSO communication. Our simulation is based on static lab measurements combined with theoretical analysis and optical geometrical intersection models. Analyses indicated that rotational deviation has a much higher impact on performance than translational deviation. Current commercial multirotor platforms proved adequate for future FSO communication, with 16 to 30% expected throughput when employing suitable optical arrays. We conducted a parametric sweep test to determine optimal and marginal receiver parameters based on platform characteristics and performance metrics. This analysis was conducted and reported as one example of the many applications that our developed mathematical models support.

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“…A prototype for an omni-directional VLC transceiver is presented in Ref. [10] with the discussion of possible applications. A special design of a hexagonal-pyramid-structure transceiver is provided in Ref.…”

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confidence: 99%

“…On the other hand, the LED and PD chips are arranged in the same plane for circumferential communication, which suggests that only a two-dimensional omni-direction is realized in our platform, and the three-dimensional omni-direction communication can be realized using more advanced and complex LED/PD arrays [10,11] . With the signaling and data communication on the omni-directional VLC channels, the robots can not only passively follow the management operations, but also actively share the information among the robots themselves, and the intelligent coordination can be realized.…”

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confidence: 99%

Indoor multi-robot intelligent coordination based on omni-directional visible light communication

Huang

Cao

et al. 2016

中国光学快报

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Multi-robot coordination (MRC) is a key challenge for complex artificial intelligence systems, and conventional wireless-communication-based MRC mechanisms that cannot be deployed in radio-frequency-limited environments. In this Letter, we present a promising solution that utilizes indoor omni-directional visible light communication (VLC) technology to realize efficient multi-robot intelligent coordination (MRIC). The specific design is presented along with the implemental details of a practical MRIC experimental platform. The experimental results show that a 50 Mb∕s on-off-keying-based omni-directional VLC can be realized with an effective distance of 2.3 m and a bit error rate of <10 −6 in the proposed MRIC platform.

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Automatic realignment with electronic steering of free-space-optical transceivers in MANETs: A proof-of-concept prototype

Cited by 20 publications

References 23 publications

Maintaining a free-space-optical communication link between two autonomous mobiles

Maintaining a free-space-optical communication link between two autonomous mobiles

Multielement FSO Transceivers Alignment for Inter-UAV Communications

Indoor multi-robot intelligent coordination based on omni-directional visible light communication

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