The Path to 4G: LTE and LTE-Advanced
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Transcript of The Path to 4G: LTE and LTE-Advanced
The Path to 4G: LTE and LTE-Advanced
James SeymourJames Seymour Senior Director Alcatel-Lucent
4G Technology Roadmap - Hosted by 4G Americas
Applications & Devices Driving Bandwidth
Feature Phones Smartphones Tablet ComputersOne Data Friendly
F PhFeature Phones Smartphones Tablet ComputersOne
megabyte = one digital
book, 45 seconds of
Voice Calls: 4-11 MB/Hr
Web Browsing:
Voice Calls: 4 -11 MB/Hr
Web Browsing:
Voice Calls: 4-11MB/Hr
Web Browsing:
Web Browsing: 350MB
Net Radio:
Feature Phones
seconds of music, 20 seconds of medium quality video
Web Browsing: 20 MB
Email: 20 MB
Web Browsing: 30 MB
Email: 50 MB
Web Browsing: 100 MB
Net Radio: 70 MB
YouTube Videos:
Net Radio: 140 MB
YouTube Videos: 150 MB
Email: 100 MBvideo50 MB
Email: 50 MB80 MB
185 MB
800 MB
*high-end netbooks or laptops model about 30% higherhl
y To
tal*
* Estimated Source: BusinessWeek (February 2010), Data: Internal Alcatel-Lucent Research
800 MB
1,900 MB (1.9GB)
about 30% g e
Mon
th
4G Technology Roadmap - Hosted by 4G Americas
Smartphone User Profile for 4G
3,000MBps/month/user
2,000
2,500Gaming
Web BrowsingAudio StreamingDownloads
1,000
1,500 All Video
500
2010 2011 2012 2013 2014 2015
Cloud (non-Video)P2PSMS/MMS/IM/Voice
0
High Growth in Web, Streaming, Interactive Video Apps
D t U LTE j t d t f 700MB t 2 5GB
2010 2011 2012 2013 2014 2015
4G Technology Roadmap - Hosted by 4G Americas
Data Usage per LTE user projected to grow from 700MB to 2.5GB
Meeting the Fast Growing Wireless Data Capacityand User Experience Demands
Broadband Capacity
4G/LTE/ LTE-Advanced
E2E IP Service / Policy ManagementHetNetSmall
Cells
2G3G+
Network Topology Evolution
SONWiFi
Leverage LTE Spectral Efficiency and New Spectrum Cost-Efficiency / QoE
4G Technology Roadmap - Hosted by 4G Americas
and New Spectrum Cost Efficiency / QoE
Achieving the End-to-End SolutionSubscriber Apps
and Services
PCRF
MME HSS
Device Partnerships
Flexible LTE Radio Access
Field proven Aggregation and Core Network
Application Prototyping & Service
IMS,Mobile TV, etc.eNodeB
PCRF
SGW
PGW
Partnerships Optionsgg g
Transportyp g
Delivery Platforms
LTE Baseband Unit Service SGW & PGW
Service Router
Aggregation Router MMEPlug-in Remote head
MicrowavePCRF HSS
l l i i h i l b i d l
Small Cells / Specific Deployments
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Alcatel-Lucent is paving the way to new wireless business models.
Carrier Aggregation (CA) for LTE-Advanced
Carrier Aggregation combines multiple LTE carriers
Intra band example: 40 MHzIntra-band example: 40 MHz
Carrier Aggregation combinations defined as non-
release specific.
20 MHz 20 MHz
Inter-band example: 40 MHz
20 MHz 20 MHz
Inter band example: 40 MHz
Freq
CA Critical for meeting ITU IMT-Advanced Peak Rate Requirement (1 Gbps)
Freq
4G Technology Roadmap - Hosted by 4G Americas 6 | August 2010
MIMO Enhancements for LTE-Advanced
Decision Tree
SM = Spatial MultiplexingRI = Rank IndicationCQI = Channel Quality IndicationPMI = Pre-coding Matrix IndicationRS = Reference Symbol
SIMO
Rel-10 (LTE-Advanced) adds 8x8 DL and 4x4 UL
Single A
Diversity Array2x2, 4x2 or 4x4
Linear Array1x2 or 1x4
4x2, 4x4SIMO MIMO
AntennaMU-MIMO
P t 0
Port 5Dedicated RS Dual Layer (Rel-9)
Open LoopRI, CQI, no PMI
Closed LoopRI, CQI, PMI
Port 0Common RS
Single StreamRank 1
Multi-StreamRank 2-4
Transmit Di it
Open Loop SM
Single StreamRank 1
Multi-StreamRank 2-4
Closed Loop R k 1
Closed Loop
Rel-10 (LTE-Advanced) improves codebook/feedback
for MU-MIMO Diversity Rank=1 Precoding
SM
LTE-Advanced builds off the wide range of Rel-8/Rel-9 MIMO capabilities to i k d l ffi i
for MU MIMO
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improve peak rates and spectral efficiency
MU-MIMO Enhancement for LTE-Advanced
MU-MIMO enhancements provide up to 50% spectral efficiency gain Dynamic switching between SU- and MU-MIMO supportedy g pp Up to 2 layers per UE in MU-MIMO Enhanced CSI feedback structure and codebook design
CSI feedback
Enhanced MU MIMOMU-MIMO
MU-MIMO Enhancements critical for meeting IMT-Advanced
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MU MIMO Enhancements critical for meeting IMT Advanced DL spectral efficiency requirements
Co-ordinated Multi-Point (CoMP) Multiple Approachesp pp
Interference Avoidance Network MIMO
Potential 2x spectral efficiency gain , but complex
Advanced forms of CoMP only provide ~2X spectral efficiency increase still need more cells to meet faster growing wireless data capacity demands
4G Technology Roadmap - Hosted by 4G Americas
Where Small Cells Provide Gains
500x
200x
75xic in
crea
se
Metro Cell75x
20x
nsit
y or
tra
ffi
I d H
Metro Cell
5x
1 Add Carrier on Macro
Den Indoor Home
& Enterprise
Source: Bell Labs Modeling analysis
Hotspot Size (Area in Square Meter)
100,00025,00010,0005,0001,000250
H E t i d M t C ll li t th M N t k
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Home, Enterprise and Metro Cells compliment the Macro Network
Interference Management with Small Cells
Interference
Frequency Selective Scheduling (FSS), Power Control (PC) and Inter-Cell Interference Coordination (ICIC) enables same carrier HetNet deployments for LTE
Macro eNBPico Cell
InterferenceControlData
LTE Rel-8 capabilities such can manage LTE HetNet interference.
PDCCHHigh power High power
PDCCH-less
CC2CC1LTE-Advanced features such as Carrier Aggregation (CA) and Enhanced ICIC (eICIC) will further improve same carrier HetNet performance for LTE
Macro eNB
UE on carrier 2 withcontrol on carrier 1
UE on carrier 2 withcontrol on carrier 2 UE on carrier 1 with
UE on carrier 1 withcontrol on carrier 1
PDCCH
Macro cell
Small cell
PDCCH
CA Avoids control channel interference
PDCCH-less
PDCCH less
LTE-Advanced techniques further help to manage control channel Interference.
control on carrier 2 UE on carrier 1 withcontrol on carrier 2
Small cell
Low powerLow power
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LTE Small Cells/HetNets Performance
1 3GPP Case I with Configuration 4a
Case1 3D - PL model 1 - PS4a - 30dBm pico TX power
5000O lll
Source: Bell Labs Research
No Biasing
0.6
0.8
F
3000
3500
4000
4500
ghpu
t [M
bps]
OveralllMacro onlyPico only
0.4
C.D
.F
No Hotzone10 Hotzone with 0dB Bias1000
1500
2000
2500
Agg
rega
ted
thro
ug
10-2 10-1 1000
0.2
10 Hotzone with 3dB Bias10 Hotzone with 6dB Bias10 Hotzone with 9dB Bias
0
500
0 1 2 4 10
Number of pico cells per macro cell
Normlized User Throughput (bps/Hz)Key Assumptions: Macro: Outdoor RRH based on 3GPP Case1 (ISD = 500m, 2 GHz, 46 dBm),
Small Cell: 30 dBm, 4a dropping criteria 60 UEs and constant number of small cells per macro; 2 UEs in 40m radius around each small cell; small cells and remaining UEs uniformly distributed,
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LTE Small Cell/HetNets provide significant capacity improvement critical for addressing the fast growing wireless data demands
Relays
Type I (in band) C1 time 1C1 time 2C1 C2
Time division multiplex at relay
Type Ia (out-of-band providing RF isolation) C1
C1 or C2Donor eNB Relay node
Type Ia (out of band providing RF isolation)C2C1, C2 or C3
Donor eNB Relay node
Type Ib (in band, RF isolation) C1C1 or C2
R l d
RF isolation at relay
Donor eNB Relay node
Relays can provide backhaul solution where dedicated backhaul is challenging
4G Technology Roadmap - Hosted by 4G Americas 13 | August 2010
Self Optimizing Network (SON)Innovations to continue through LTE-Advanced
Self-Configuration/
Plug & Play
Handover &RACH
Optimization
Neighbor Cell Relation &auto Cell ID
Interference Co-Ordination
(ICIC)
Load Balancing E2E &
HetNet Optimization
Coverage &Capacity
Optimization
Release 8
Energy Savings
Release 9 Release 10 & Beyond
( )
Plug & play femto
Automated neighbor cell
Inter-Cell Interference Cancellation based on inter-cell
Savings
femto neighbor cell relation
Cancellation based on inter-cell negotiation
• Reduces Hand Over failure
• Improves throughput/QoE• Performance increase in call set up
Comprehensive SON solution, powered by our 3G experience and
Bell Labs Research Bell Labs efforts injected into
4G Technology Roadmap - Hosted by 4G Americas
Bell Labs efforts injected into our wireless developments
Summary
• Fast growing wireless data capacity demands due to smartphones and highFast growing wireless data capacity demands due to smartphones and high growth in web, streaming and interactive video apps
• LTE & LTE-Advanced coupled with small cells & relays will address these fast growing wireless data capacity demandsgrowing wireless data capacity demands
• Carrier Aggregation and MU-MIMO enhancements are the key LTE-Advanced features for meeting IMT-Advanced requirements
CoMP has potential to provide significant further spectral efficiency gain with added– CoMP has potential to provide significant further spectral efficiency gain with added complexity
– Relays and continued SON evolution to support E2E and HetNet optimizations are additional LTE-Advanced features
• Alcatel-Lucent is delivering market leading end-to-end LTE solution with smooth evolution to LTE-Advanced, paving the way to new business models
4G Technology Roadmap - Hosted by 4G Americas