Terahertz Wireless Access Technologies to Deliver Optical ...terapod-project.eu/wp-content/uploads/2018/03/THz... · “Terahertz Technologies to Deliver Optical Network Quality of

© The TERRANOVA consortium 2017-2019

This project has received funding from the European

Union's Horizon 2020 research and innovation

programme under grant agreement No 761794

Terahertz Wireless Access Technologies

to Deliver Optical Network Quality of Experience

in Systems Beyond 5G

Angeliki Alexiou

[email protected]

“Towards Terahertz Communications” Workshop,

7 March 2018, EC, Brussels


A Vision for Systems beyond 5G

Systems Beyond 5G - expectations:

• Unprecedented performance excellence, in the Tbps regime

• Inherently support a large dynamic range of novel usage scenarios that combine extreme data rates with agility, reliability, zero response time and AI

• Cost-efficient and flexible provision of high-speed data connections guaranteed, zeroing the ‘digital divide’

Vision:

• Extend the fibre optic systems QoE and performance reliability to wireless, by exploiting frequencies above 275GHz for access and backhaul links

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THz unique challenges

• Bridge the THz ‘gap’

• Tackle the THz propagation characteristics

• Ultra wideband and extremely directional wireless links

• Absorption Loss

• Attenuation with distance

• Devise a new network information theoretic framework imposed by the new disruptive characteristics of the channel

• Design MAC protocols tailored to ‘pencil-beam’ access: challenging initial access/discovery and tracking w.r.t. complexity/delay/reliability/..

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TERRANOVA System Concept

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TERRANOVA Vision and Objectives

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TERRANOVA building blocks

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TERRANOVA building blocks (2)

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Application Scenarios and Use Cases

a) Point-to-point,

b) Point-to-multi-point and

c) Indoor quasi-omnidirectional

Use case Scenario Use case basic

requirement

Fibre extender 1 Data Rate: 1 Tb/s

Range: ~1 km

P2P 1 Data Rate: 1 Tb/s

Distance < 1 km

Redundancy 1 Data Rate: ~0.1 Tb/s

Availability:~99.999%

Corporate backup

connection 1

Data Rate: 0.1 Tb/s

Range: ~1 km

IoT dense

environment 2 and 3

Data Rate: 0.1 Tb/s

Latency< 1 ms

Reliability: App. depend.

Data centres 2 Data Rate: 0.2 Tbps

Range < 100 m

Short range THz

access indoors 2 and 3

Data Rate: up to 0.3 Tbps

Range < 20 m

Ad-hoc access 2 and 3

Data Rate: 0.1 Tbps

Range ~ 500 m

Installation time < 1 hour

Sport , music

events, etc. 2

Data Rate: 0.2 Tbps

Range ~ 500 m

Last mile access 2 Data Rate: 0.1 Tb/s

Range: ~1 km 8


Design Principles THz Channel Modelling*

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*Alexandros-Apostolos A. Boulogeorgos, Angeliki Alexiou, Thomas Merkle, Colja Schubert, Robert Elschner, Alexandros Katsiotis, Panagiotis Stavrianos,

Dimitrios Kritharidis, Panteleimon-Konstantinos Chartsias, Joonas Kokkoniemi, Markku Juntti, Janne Lehtomaki, Antonio Teixeira, and Francisco Rodrigues, “Terahertz Technologies to Deliver Optical Network Quality of Experience in Wireless, Systems Beyond 5G, to appear in IEEE Communications Magazine, 2018


SNR and capacity depend on:

• transmission central frequency;

• transmission power allocation;

• antenna gains;

• distance between the TX and RX;

• transmission bandwidth; and

• atmospheric conditions

Assumptions and considerations

•Assume flat transmission PSD, S(f)=So

•g=100 dB

•B=125 GHz

•Standard atmospheric conditions

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Design Principles Fundamental Performance Evaluation in 275−400 GHz*

*Alexandros-Apostolos A. Boulogeorgos, Evangelos N. Papasotiriou, Joonas Kokkoniemi,

Janne Lehtomaki, Angeliki Alexiou, and Markku Juntti, “Performance Evaluation of THz Wireless Systems Operating in 275−400 GHz Band ”, to be presented at VTC Spring 2018


• For a given γ, As the transmission distance

increases, the used bandwidth will

be constrained.

• For a given d, As γ increases, the available

bandwidth also increases.

• For given Pb and γ, As the distance increases, the

achievable rate decreases.

• For given Pb and d, As γ increases, the achievable rate

increases.

Frequency selectivity tolerance

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A distance and bandwidth dependent adaptive modulation scheme for THz communications*

*Alexandros-Apostolos A. Boulogeorgos, Evangelos N. Papasotiriou, Angeliki Alexiou,

“A distance and bandwidth dependent adaptive modulation scheme for THz communications”, submitted to SPAWC 2018


MAC and RRM Beam-Space Access

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• Step 1: Synchronization and Signal

Detection

• Step 2: Random Access Preamble Tx

• Step 3: RA response (RAR)

• Step 4: Connection Request

• Step 5: Scheduled Communication

• Critical parameters: Beamwidth, number of beamspace channels,

number of pilots, distance, mobility

• Important metrics/challenges: detection probability, space

synchronization (misalignment)


Expected results/innovations

• Realistic THz channel model based on experimental measurements

• THz-oriented information theoretic framework for link-level and network-level

• Pencil-beam antenna arrays design and device tracking methods

• THz-driven hybrid MAC layer protocols, device discovery algorithms and caching

• Highly adaptable framework for overall optimal resource management

• Baseband digital signal processing to allow frontend correction and impairment

mitigation in combined optical-wireless Terabit transmission links

• Cost- and energy-efficient optical RF-frontend for optical to THz interfacing, based on

state-of-the art low complexity optical transponders

• Baseband digital signal processing to enable THz transmission with higher-order

modulation formats and optimized coding to maximize the spectral efficiency

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TERRANOVA consortium

Project duration: July 2017-December 2019

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More info – upcoming events

VTC2018-Spring, 3-6 June 2018, Porto, Portugal

International Workshop on

THz Communication Technologies

for Systems Beyond 5G (W11)

5 JUNE 2018, 14.00-17.30

[organized by TERRANOVA,

featuring invited talks by industry leaders

and technical papers reporting

most recent research results]

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More info – references

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• Alexandros-Apostolos A. Boulogeorgos, Angeliki Alexiou, Thomas Merkle, Colja Schubert, Robert Elschner, Alexandros Katsiotis, Panagiotis Stavrianos, Dimitrios Kritharidis, Panteleimon-Konstantinos Chartsias, Joonas Kokkoniemi, Markku Juntti, Janne Lehtomaki, Antonio Teixeira, and Francisco Rodrigues, “Terahertz Technologies to Deliver Optical Network Quality of Experience in Wireless, Systems Beyond 5G, to appear in IEEE Communications Magazine, 2018

• Alexandros-Apostolos A. Boulogeorgos, Joonas Kokkoniemi, Evangelos N. Papasotiriou, Janne Lehtomaki, Angeliki Alexiou, and Markku Juntti, “A new look to 275-400 GHz band: Channel model and performance evaluation”, submitted to EUCNC 2018

• Alexandros-Apostolos A. Boulogeorgos, Evangelos N. Papasotiriou, Joonas Kokkoniemi, Janne Lehtomaki, Angeliki Alexiou, and Markku Juntti, “Performance Evaluation of THz Wireless Systems Operating in 275−400 GHz Band ”, to be presented at VTC Spring 2018

• Alexandros-Apostolos A. Boulogeorgos, Evangelos N. Papasotiriou, Angeliki Alexiou, “A distance and bandwidth dependent adaptive modulation scheme for THz communications”, submitted to SPAWC 2018


ict-terranova.eu

ACKNOWLEDGMENT

The presenter would like to thank all the colleagues of the project TERRANOVA for their contributions. This work has received funding from

the European Commission’s Horizon 2020 research and innovation programme under grant agreement No 761794.

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Terahertz Wireless Access Technologies to Deliver Optical ...terapod-project.eu/wp-content/uploads/2018/03/THz... · “Terahertz Technologies to Deliver Optical Network Quality of