Energy saving for data centers using spatial multichannel optical wireless communication

Kupferman, Judy; Arnon, Shlomi

doi:10.1007/s41650-017-0040-8

Cited by 9 publications

(6 citation statements)

References 37 publications

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“…Wireless optical communication links can equally offer a flexible and dynamic reconfiguration of the network. OAM multiplexing has been proposed to establish indoor wireless connections for data centers [149], [150]. The idea is to install a transceiver on top of each rack to communicate with neighbouring transceivers and create adaptive optical wireless network, as illustrated in Fig.…”

Section: Wireless Indoor Connectionsmentioning

confidence: 99%

Communicating Using Spatial Mode Multiplexing: Potentials, Challenges, and Perspectives

Trichili

Park

Zghal

et al. 2019

IEEE Commun. Surv. Tutorials

191

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Time, polarization, and wavelength multiplexing schemes have been used to satisfy the growing need of transmission capacity. Using space as a new dimension for communication systems has been recently suggested as a versatile technique to address future bandwidth issues. We review the potentials of harnessing the space as an additional degree of freedom for communication applications including free space optics, optical fiber installation, underwater wireless optical links, on-chip interconnects, data center indoor connections, radio frequency and acoustic communications. We focus on the orbital angular momentum (OAM) modes and equally identify the challenges related to each of the applications of spatial modes and the particular OAM modes in communication. We further discuss the perspectives of this emerging technology. Finally, we provide the open research directions and we discuss the practical deployment of OAM communication links for different applications. ). 4 in the future. We also summarize the open problems and the future research directions. A discussion of the practicability and cost of multi-OAM communication is also included. II. OAM POTENTIALS A. Free Space Optical CommunicationFSO is a license free wireless communication configuration that has recently received much interest for a variety of applications. FSO is an attractive solution for last mile connectivity problems, particularly for communication networks, when the installation of fiber optics is costly or not possible [66]. FSO can be also used to establish inter-building secure communication, and can be deployed as a backup to optical fibers. Wireless optical communication can guarantee a line-of-sight (LoS) high bit rate wireless transmission over long distances, up to several kilometers. Furthermore, FSO communication is considered as a promising technique to scale down bandwidth challenges in future 5G networks [67].Multiple wavelength FSO provides better transmission, as demonstrated in [68], [69]. Data can be mapped on advanced modulation formats to achieve high bit rates and high spectral efficiency levels [70]- [72]. Another option is multiple-input and multiple-output (MIMO) FSO communication in which multiple lasers are positioned to transmit Gaussian beams to multiple receiving apertures [73]. Over the last few years, it has been proven that it is possible to transmit information over spatially structured light beams [21], [74], [75] including OAM beams and plane waves. Our focus is on the OAM modes of light.The first PoC communication experiment incorporating OAMs in free space was carried out in 2004 by Gibson and co-workers [21]. Over a 15-meter long link, 8 -spaced values were chosen along the Gaussian beam as an alphabet for the communication. OAM beams were generated and detected using two light modulators. Since then, much progress has been made and free space transmission capacity of over 1 Tbit/s is, today, possible [76]- [78]. By performing three dimensional multiplexing, Huang and co-workers were able to attain a 100 Tbi...

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Section: Wireless Indoor Connectionsmentioning

confidence: 99%

Communicating Using Spatial Mode Multiplexing: Potentials, Challenges, and Perspectives

Trichili

Park

Zghal

et al. 2019

IEEE Commun. Surv. Tutorials

191

View full text Add to dashboard Cite

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“…With the rapid increase in the demand for data communication, multi-channel technology has been widely used, including multiple-input multiple-output (MIMO) and multiplexing using optical OAM (Orbital Angular Momentum), direct modulation through OAM, Etc. [1]. Data fragmentation schemes play an essential role in multi-channel transmission security, enhancing data security by designing effective segmentation methods [2].…”

Section: Introductionmentioning

confidence: 99%

A Secure Data Fragmentation Scheme Based on Pseudo-Entropy

Liu

Lin

Wang

et al. 2022

Preprint

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The typical fragmentation schemes divide the data into continuous segments, causing an uneven amount of information in the segments, resulting in a threat to the security of the overall scheme after obtaining part of the leaked information posed by an adversary with mighty computing power. To combat such attacks, we propose a pseudo-entropy-based fragmentation scheme (PEFS), which further reduces the probability of the adversaries predicting the remaining information from partially leaking information and can prevent the eavesdroppers from colluding to form a more powerful attack. Considering the current situation that fragmentation schemes lack a unified theoretical model, we proposed a data fragmentation security model, and its provable security is verified. At the same time, this paper establishes a set of security level evaluation methods for multi-channel data fragmentation transmission and demonstrates the effectiveness of the fragmentation level evaluation methods from a theoretical point of view. Further, we propose a fragmentation scheme evaluation algorithm, and through the comparison experiment with the traditional continuous fragmentation scheme shows that the fragmentation scheme based on pseudo-entropy has universality and superiority in actual transmission scenarios.

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“…Computation-intensive applications are pushing existing access networks and data center networks (DCN) to their performance limits. Conventional DCN with wired links and finite network interfaces, limit the possible topologies and could result into development and design issues relevant to heat dissipation, power consumption and maintenance [1][2][3][4]. Simultaneously, the increasingly emerging disadvantages of wired DCN include overwhelming cabling cost and cost, flexibility lack to tackle the traffic outbursts [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, one wavelength division multiple access scheme is also proposed to enhance the transmission capacity of the visible light WDC links [1]. Nevertheless, all above visible light link configurations remain constrained in the sufficiently discussed Lambertian optical source beam pattern [4][5][6][7][8][9][10]. Actually, the potential design and optimization exploration via distinct non-Lambertian beams is still absent in the investigation of visible light WDC links.…”

Section: Introductionmentioning

confidence: 99%

Visible Light Wireless Data Center Links with Distinct Beam Configurations

Ding

Chih‐Lin

Wang

2021

Proceedings of CECNet 2021

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Visible light communication (VLC) is being explored as one promising approach to enable wireless data centers (WDC). Up to now, the visible light wireless data center links are still limited to the conventional Lambertian beam paradigm. The potential coverage gain relevant to the optical beam space is waiting for sufficient investigation. For addressing this issue, in this paper, the dynamic optical beam based WDC coverage enhancement scheme is introduced, and for each transmitter, the best candidate asymmetrical optical beam is selected to load the data signal. Numerical evaluation shows that, compared with the conventional static beam configuration, up to 6.76 dB peak signal to noise ratio (SNR) gain and 4.46 dB average SNR gain could be provided by the proposed dynamic beam scheme. Moreover, this SNR dynamic range is reduced to 36.65 dB while the counterpart of the static non-Lambertian beam configuration is up to 44.78 dB.

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Energy saving for data centers using spatial multichannel optical wireless communication

Cited by 9 publications

References 37 publications

Communicating Using Spatial Mode Multiplexing: Potentials, Challenges, and Perspectives

Communicating Using Spatial Mode Multiplexing: Potentials, Challenges, and Perspectives

A Secure Data Fragmentation Scheme Based on Pseudo-Entropy

Visible Light Wireless Data Center Links with Distinct Beam Configurations

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