Building an end user focused THz based ultra high bandwidth wireless access network: The TERAPOD approach

Davy, Alan; Pessoa, L. M.; Renaud, Cyril C.; Wasige, Edward; Naftaly, Mira; Kürner, Thomas; George, Glenn; Cojocari, Oleg; Mahony, Niamh O; Porcel, M.A. Garcia

doi:10.1109/icumt.2017.8255205

Cited by 13 publications

(6 citation statements)

References 30 publications

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“…Several publications in the literature have explored the use of THz wireless links in data centers to achieve dynamic operation and higher reconfigurability [1], [10]- [14]. Moreover, THz frequencies promise a higher data rate with its large bandwidth and lower interference (due to the directional antennas) [15]- [20].…”

Section: A Related Workmentioning

confidence: 99%

THz Cluster-Based Modeling and Propagation Characterization in a Data Center Environment

2020

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Terahertz (THz) wireless data centers can provide low-latency networks and dynamic scalability that are vital for the next-generation cloud computing infrastructure. The knowledge of THz propagation characteristics in a data center environment is essential to the development of novel THz communication systems. However, a comprehensive characterization and modeling of THz propagation channels, which includes various obstructions in a data center is not available. This paper presents results from a THz channel measurement campaign conducted in a data center environment. Various propagation scenarios such as lineof-sight (LoS) link, non-LoS (NLoS) link using existing materials in a data center to redirect the beam, and obstructed-LoS (OLoS),-NLoS (ONLoS) links with common objects in data centers (cables and server racks' mesh doors) serving as obstruction were investigated. Propagation channel parameters such as pathloss and root-mean-squared (RMS) delay spread were analyzed in the aforementioned scenarios while cluster-based modeling was implemented for some scenarios. The proposed model for THz propagation in a data center environment was validated with the measured data. The average inter-arrival time of clusters (1/) and rays (1/λ) are estimated as 4.4 ns and 0.24 ns, respectively. We find that local scattering objects such as server-rack frames/pillars can be used to assist the NLoS type of link, and that cooling airflow in the data center has a negligible impact on THz propagation. Power cables and mesh doors of the server racks can cause additional attenuation of about 20 dB and 6 dB, respectively. Cluster model and other characterization results provided in this work are pertinent to THz wireless system design for data center environments. INDEX TERMS Channel measurements, channel modeling, statistical channel model, terahertz (THz) communications, wireless data centers.

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Section: A Related Workmentioning

confidence: 99%

THz Cluster-Based Modeling and Propagation Characterization in a Data Center Environment

2020

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“…As a promising solution to overcome this issue, wireless interconnection has been proposed [11]. Several studies have been conducted on high-speed wireless links using highfrequency carriers such as millimeter-waves and terahertz (THz) waves [12][13][14][15]. THz waves are electromagnetic waves ranging from 100 GHz to 10 THz, and research on wireless links using 200-GHz ∼ 400-GHz carrier frequencies has been the most active because of the availability of electronics and photonicsbased devices.…”

Section: Introductionmentioning

confidence: 99%

PAM4 48-Gbit/s wireless communication using a resonant tunneling diode in the 300-GHz band

Oshiro

Nishigami

Yamamoto

et al. 2022

IEICE Electron. Express

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In modern optical communications, pulse amplitude modulation 4 (PAM4) is employed to achieve higher data rates than that achieved by conventional non-return-to-zero format. Meanwhile, there is an increasing interest to convert wired connections to wireless in data centers using high-speed millimeter-wave and terahertz (THz) links. Here, we introduced the PAM4 modulation for THz wireless communications using a resonant tunneling diode (RTD) receiver. Compared with a Schottky-barrier diode receiver, the RTD receiver has higher sensitivity, and a stronger nonlinearity at low input power when it is operated with an amplified detection scheme. We achieved 24-Gbaud (48-Gbit/s) transmission in the 300-GHz band with a quasi-real-time digital signal processing (DSP), which is the fastest PAM4 wireless communication without an offline DSP to the best of our knowledge.

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“…With ever-increasing demand for high bandwidth communications in the age of 5G and beyond, researchers have turned their focus to previously un-used parts of the spectrum, including the THz band, in a bid to achieve the coveted goal of 1 Tbit/s wireless transmission [1]. Data centre networks (DCNs) have been identified as a promising proving ground for ultrahigh bandwidth THz wireless communications, as they provide controlled environmental conditions and well-organised geometric layouts that allow line-of-sight to be achieved, as required by THz, and they require the transmission of large volumes of data across short distances, achievable by THz wireless links.…”

Section: Introductionmentioning

confidence: 99%

Integrating THz Wireless Communication Links in a Data Centre Network

Ahearne

O’Mahony

Boujnah

et al. 2019

2019 IEEE 2nd 5G World Forum (5GWF)

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Modern data centre networks are increasingly made up of optical fibre connections and controlled by software defined networking. Recent advances in THz wireless technologies have paved the way for ultra-high bandwidth wireless communication, reaching the point where these wireless links can begin to compete with optical fibre links. This work investigates the feasibility of integrating wireless THz links in a data centre network, reporting on the performance that can be achieved at the physical layer, proposing an architecture for the data link layer and illustrating, through network emulation, how these wireless links could be used to reduce congestion in a network.

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Building an end user focused THz based ultra high bandwidth wireless access network: The TERAPOD approach

Cited by 13 publications

References 30 publications

THz Cluster-Based Modeling and Propagation Characterization in a Data Center Environment

THz Cluster-Based Modeling and Propagation Characterization in a Data Center Environment

PAM4 48-Gbit/s wireless communication using a resonant tunneling diode in the 300-GHz band

Integrating THz Wireless Communication Links in a Data Centre Network

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