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10 Times Beyond LTE-A Business Case, Technologies, Challenges
Mischa Dohler Head of [IQe] @ CTTC
Barcelona, Spain
2021 TID Networking Summit
15 December 2011
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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
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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
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Data support jeopardizes business prospects:
½ of CAPEX & ¼ of OPEX is must to be profitable:
Revenue versus Infrastructure Cost
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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
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Above-rooftop HBS serving many below-rooftop ABSs:
1Gbps/km2 Architecture [1/2]
ABS
ABS ABS
HBS
Polarization 1
Polarization 2
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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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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
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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
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1Gbps/km2 Simulation Results
40 MHz bandwidth & 4 beams achieve 1Gbps/km2 capacity density:
7
6
8
5
4
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Docition Improves Convergence
Convergence speed improves by order of magnitude from 20,000
(cognitive) to 4,000 (docitive) iterations:
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COBHAM’s high-capacity multi-beam Hub BS:
From Theory to Prototyping [1/3]
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ALVARION’s SISO & CTTC’s MIMO Access BSs:
From Theory to Prototyping [2/3]
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SIKLU’s cost-efficient 60GHz backhaul technology:
From Theory to Prototyping [3/3]
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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
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Tel Aviv and Barcelona live deployments in 2012:
From Standards to Practice
HBS
ABS
Legend:
Telefónica
interested?
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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