10 Times Beyond LTE-A Business Case, Technologies, Challenges

Mischa Dohler Head of [IQe] @ CTTC

Barcelona, Spain

2021 TID Networking Summit

15 December 2011

2/18 © 2011 Mischa Dohler

IMT-A capacity targets [ITU-R M.2133]:

2.2b/s/Hz for downlink and 1.4b/s/Hz for uplink

in urban deployment

supported rate is thus maximal 100Mbps/km2

(500m cell size; 40MHz)

Capacity needs (reality check):

peak density of 8,000 people/Km2

of which only 10% subscribe to the broadband service

of which only 20% require access at the same time

each requiring 5Mbps

IMT-Advanced versus Reality

City Average

People/Km2

Athens 5,400

Madrid 5,200

London 5,100

Barcelona 4,850

Warsaw 4,300

Naples 4,100

Berlin 3,750

Paris 3,550

Vienna 3,400

8,000 X 10% X 20% X 5Mbps = 800 Mbps/Km2

3/18 © 2011 Mischa Dohler

Increase in capacity over past decades:

Martin Cooper: doubled every 30 months over past 100 years

overall: million-fold increase in capacity since 1957

Breakdown of these gains:

5 x PHY; 25 x spectrum; 1600 x reduced cells, 5 x rest

Breakdown of (estimated) cost:

Air Interface versus Architecture

Reduced Cells MHz

Reduced Cells MHz PHY

4/18 © 2011 Mischa Dohler

Data support jeopardizes business prospects:

½ of CAPEX & ¼ of OPEX is must to be profitable:

Revenue versus Infrastructure Cost

5/18 © 2011 Mischa Dohler

BuNGee - Beyond Next Generation Mobile Broadband:

Project Coordinator: Alvarion, Israel

Public Website: http://www.ict-bungee.eu/

Duration: Jan 2010 – June 2012

Scheme: STREP

Innovative points of the project:

few high capacity above-rooftop Hub-BSs (HBS)

many below-rooftop access BSs (ABS)

very cost efficient 60GHz backhauling technology

system-aware PHY techniques (networked MIMO, etc)

joint design of backhaul and access networks, using heterogeneous radio

elements, licensed and licensed-exempt spectrum, etc.

design of a data and control plane protocol suite which facilitates autonomous

operation by means of a complete self-organizing networking paradigm

BuNGee – Excellent Byte/€ Ratio

6/18 © 2011 Mischa Dohler

Above-rooftop HBS serving many below-rooftop ABSs:

1Gbps/km2 Architecture [1/2]

ABS

ABS ABS

HBS

Polarization 1

Polarization 2

7/18 © 2011 Mischa Dohler

Cost-efficient mixture of L/LE/60GHz wireless technologies:

1Gbps/km2 Architecture [2/2]

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Various planning and deployment possibilities:

Deployment Possibilities

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9/18 © 2011 Mischa Dohler

From cognitive to docitive networking paradigms:

cognition: “system which is working under conditions it was not designed for”

docition: “teaching” between expert nodes to accelerate learning/cognition

result: truly autonomous SON with quick convergence

Management: Cognition & Docition

10/18 © 2011 Mischa Dohler

Grid Architecture:

mimic Barcelona layout

per sector 4 ABSs, 1 user each

simulating 1 sector only

Aggressive Frequency Reuse:

access link and self-backhaul communicate

simultaneously

access link and self-backhaul use the same

band

Self-Organizing Network:

adaptive and distributed power and

interference control at the ABS

1Gbps/km2 Simulation Scenario

11/18 © 2011 Mischa Dohler

1Gbps/km2 Simulation Results

40 MHz bandwidth & 4 beams achieve 1Gbps/km2 capacity density:

7

6

8

5

4

12/18 © 2011 Mischa Dohler

Docition Improves Convergence

Convergence speed improves by order of magnitude from 20,000

(cognitive) to 4,000 (docitive) iterations:

13/18 © 2011 Mischa Dohler

COBHAM’s high-capacity multi-beam Hub BS:

From Theory to Prototyping [1/3]

14/18 © 2011 Mischa Dohler

ALVARION’s SISO & CTTC’s MIMO Access BSs:

From Theory to Prototyping [2/3]

15/18 © 2011 Mischa Dohler

SIKLU’s cost-efficient 60GHz backhaul technology:

From Theory to Prototyping [3/3]

16/18 © 2011 Mischa Dohler

ETSI TC BRAN, TR 101 534:

Alvarion, CTTC, Polska Telefonia Cyfrowa, Siklu, Thales

"Very high capacity density BWA networks; System architecture, economic

model and technical requirements“

next audio: Tuesday 20 December 2011, 2pm CET (please join!)

From Prototyping to Standards

17/18 © 2011 Mischa Dohler

Tel Aviv and Barcelona live deployments in 2012:

From Standards to Practice

HBS

ABS

Legend:

Telefónica

interested?

18/18 © 2011 Mischa Dohler

Operator’s capacity challenge today and for next years:

capacity requirements are far off reality

except for order-of-magnitude PHY, rather work on architecture

infrastructure cost is major driver since ROI margins tighten

management becomes major problem, SON is a must

1Gbps/Km2 architecture with the following properties...

… LTE(-A) & WiMAX-agnostic architecture

... anytime and everywhere in urban environments

… cost-efficient to operators, service providers, users

… spectrally efficient using both licensed and exempt bands

... autonomous operation facilitating deploy & forget experience

Concluding Remarks