Optical Access Technology for B5G MFH/MBH

Nishimura, Kosuke; Ishimura, Shota; Bekkali, Abdelmoula; Tanaka, Kazuki; Hirayama, Haruhisa; Tsukamoto, Yu; Nanba, Shinobu; Suzuki, Masatoshi

doi:10.1364/ofc.2019.w3j.1

Cited by 8 publications

(4 citation statements)

References 1 publication

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“…W ITH the ever-increasing of global mobile data traffic, there is a consensus that 5G/6G networks will enable faster data speeds, higher capacity, lower latency, and massive connectivity [1]. These requirements will lead to almost similar performance to the current fiber-to-the-home services, and thus they will pose a huge challenge to the legacy optical access network [2], [3]. Despite the clear advantages of the optical fiber communications for 5G/6G networks, the lack of deployment flexibility, resiliency and cost make their operation challenging, especially in dense urban areas, as well as remote areas lacking fiber infrastructure [4], [5].…”

Section: Introductionmentioning

confidence: 99%

New Generation Free-Space Optical Communication Systems With Advanced Optical Beam Stabilizer

Bekkali¹,

Fujita²,

Hattori³

2022

J. Lightwave Technol.

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In this paper, we introduce a novel concept and design of a full-duplex and all-optical FSO transceiver and evaluate its transmission performance in 200 m outdoor environment. Our transceiver enables a reliable fiber-to-fiber FSO link with intelligent lens-based optical-beam-stabilization (OBS) by utilizing miniaturized and cost-effective 3-axis voice-coil motors (VCMs) actuators. The VCM-based moving lens that is widely used in smartphone cameras for auto-focus and opticalimage-stabilization is customized and optimized for our designed transceiver to expand the transmitter and receiver field-of-view, control both the transmitted and incident laser beam alignment, suppress the effects of random beam angle-of-arrival fluctuations induced by the atmospheric turbulence and pointing errors and maintain efficient direct coupling to the fiber core at the receiver. Unlike the 2-axis fast-steering-mirrors, the use of 3-axis VCM lenses can not only maintain the beam alignment, but also control the beam collimation and adjust the difference between the lens focal plane and projection plane for a higher fiber coupling efficiency. Using our developed FSO transceivers, we demonstrate an error-free transmission of the standard signals 10GbE LAN and common public radio interface (LTE-CPRI) over 200 m links. We also performed a continuous 24-hour transmission evaluation in a clear weather day, with only occasional burst errors were recorded and a total 24-hour BER of 3×10 −10 . The obtained results demonstrate the potential of our proposed FSO transceiver to ensure high-capacity communication links and facilitate the adoption of the FSO system as a viable candidate to address the main requirements of B5G/6G networks.

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Section: Introductionmentioning

confidence: 99%

New Generation Free-Space Optical Communication Systems With Advanced Optical Beam Stabilizer

Bekkali¹,

Fujita²,

Hattori³

2022

J. Lightwave Technol.

Self Cite

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“…Following this need, unlike previous generations of cellular communications, the standard frequency allocation of the 5G NR wireless fronthaul is divided into two sub-bands: Frequency Range 1 (FR1) in the 1-6 GHz [7] and Frequency Range 2 (FR2) in the 24-71 GHz [8]. The rest of the service scenarios have their own, different from each other, requirements to the accommodating networks, and the Mobile Fronthaul (MFH) and/or Mobile Backhaul (MBH) should be optimized for their implementation [9].…”

Section: Introductionmentioning

confidence: 99%

Computer-aided design for analog wireless fronthaul of B5G cellular communication systems

Belkin¹,

Golovin²,

Tyschuk³

et al. 2021

ITU-J FET

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Specialties of an analog fronthaul based on Radio-over-Fiber architecture and key principles of exploiting microwave photonics technology when designing a millimeter-wave Radio Unit (RU) are reviewed and discussed. To clarify, in this paper we perform a comparative simulation for a specific example of developing an obligatory RU's node as a reference oscillator with an output radio frequency (RF) of more than 100 GHz, which is typically implemented by means of a circuit that includes a relatively low-frequency RF oscillator followed by a high-order frequency multiplier. Following the principles and approaches outlined, we propose and describe two alternative schemes for implementing a frequency multiplier from 4.25 to 102 GHz using microwave-electronics or microwave-photonics approach. Further, using Cadence AWRDE software with an additional introduction of the previously proposed models of optoelectronic devices, their main characteristics are considered. To ensure the practical orientation of the model experiments, the parameters of each of the models used are selected based on the specifications of commercially available discrete components.

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“…Higher frequency electromagnetic waves are exploited for more spectrum resources. In order to discover new spectrum resources, research on millimeter waves, terahertz, and optical communications will become important directions [3] [4] [5]. For optical wireless communication, free space optical communication (FSO), visible light communication(VLC), short-range near-infrared communication and other technologies have been thoroughly studied and widely applied.…”

Section: Introductionmentioning

confidence: 99%

Performance of Wireless Optical Communication With Reconfigurable Intelligent Surfaces and Random Obstacles

Wang,

Zhang,

Zhu

et al. 2020

Preprint

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It is difficult for free space optical communication to be applied in mobile communication due to the obstruction of obstacles in the environment, which is expected to be solved by reconfigurable intelligent surface technology. The reconfigurable intelligent surface is a new type of digital coding meta-materials, which can reflect, compute and program electromagnetic and optical waves in real time. We purpose a controllable multi-branch wireless optical communication system based on the optical reconfigurable intelligent surface technology. By setting up multiple optical reconfigurable intelligent surface in the environment, multiple artificial channels are built to improve system performance and to reduce the outage probability. Three factors affecting channel coefficients are investigated in this paper, which are beam jitter, jitter of the reconfigurable intelligent surface and the probability of obstruction. Based on the model, we derive the closed-form probability density function of channel coefficients, the asymptotic system's average bit error rate and outage probability for systems with single and multiple branches. It is revealed that the probability density function contains an impulse function, which causes irreducible error rate and outage probability floors. Numerical results indicate that compared with free-space optical communication systems with single direct path, the performance of the multi-branch system is improved and the outage probability is reduced.

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Optical Access Technology for B5G MFH/MBH

Cited by 8 publications

References 1 publication

New Generation Free-Space Optical Communication Systems With Advanced Optical Beam Stabilizer

New Generation Free-Space Optical Communication Systems With Advanced Optical Beam Stabilizer

Computer-aided design for analog wireless fronthaul of B5G cellular communication systems

Performance of Wireless Optical Communication With Reconfigurable Intelligent Surfaces and Random Obstacles

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