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Business Drivers for Selecting LTE Technology
HSPA+ & LTE Executive Briefing, Jan 27, 2009Hank Kafka, Vice President, Network Architecture, AT&T
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Why LTE?
•HSPA, HSPA+ provides great data speeds with impressive improvements over next 2-3 years
•HSPA, HSPA+ is already the mobile broadband technology of choice worldwidetechnology of choice worldwide
•LTE will be adopted by >80% of the world’s wireless carriers
•Incredible economies of scale will be created with LTE through the GSM community as well as the CDMA communityCDMA community
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Projected Broadband Growthns
)ns
(mill
iobs
crip
tion
Su
S O St t A l ti E iSource: Ovum, Strategy Analytics, Ericsson
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Projected Traffic Growth
600
700
Aggressive 3G/4GData Traffic
400
500Growth
200
300
1 corresponds to 2007 2G Data Traffic
Conservative 3G/4GData Traffic Growth
0
100
1
20Voice Traffic Growth
2G Data Traffic Growth
0
5
10
15
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
AO - 12/17/07Source: AT&TSource: AT&T
Source: Peter Rysavy, 3G Americas
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LTE Subscriber Growth ForecastsM
illio
ns
ABI Research
Analysys Mason
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Devices Primed For Embedded WirelesseReader• On the go access to books• Simple out of the box experience
Picture Frame• Push photos to Grandma• No setup required
CarPNDs• Real Time Traffic• Points of Interest• Web Search
• Diagnostics & Safety• Web Surfing• Real Time Traffic• Internet Radio
The Network
Digital CamerasBackup Photos Gaming Devices• Backup Photos
• Limitless Memory Card
Media Player• Internet Radio
MID & UMPC• Web Browsing
Ga g e ces• Multiplayer Games• Access to game
downloads
• Internet Radio • Web Browsing
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Profitability demands lower price per MByteMByte
Source: Nokia-Siemens
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LTE Lowers Opex Dramatically
UMTS HSPA (2 X 5MHz) LTE (2 X 5MHz)Theoretical average throughput 128-384 Kbps 1 Mbps 4 Mbps
Theoretical maximum throughput 2 Mbps 14 Mbps 20 Mbps
Monthly downlink traffic 230 TB (5MHz)500 TB (10MHz)
500 TB 1800 TB500 TB (10MHz)
Typical cost per (downlink) megabyte at maximum use of
E 0 6 E 0 3 E 0 1network Euro 0.6 Euro 0.3 Euro 0.1
Source: Analysys Research 2007
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OFDM: Delivering the Data
OFDM Advantages• Copes with severe channel conditions
OFDM Trucking Companyp
• Robust against narrowband interference
• Can be deployed across various frequency bandsbands
• Scales easily for different amounts of available bandwidth
FDM Trucking Company
• Effective for broadcast systems, higher bandwidth radio systems, and high peak data rates in large blocks of spectrum.
Analogy courtesy: www.complextoreal.com
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MIMO Using Multiple Paths to Boost Throughput and CapacityThroughput and Capacity
Encoder Decoder
Source: 3G Americas
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LTE: Spectrum Flexibility and EfficiencyEfficiency
LTE to operate in 1.4, 1.6, 3, 3.2, 5, 10, 15 and 20 MHz p , , , , , ,bandwidths
Significantly improved spectrum efficiencySignificantly improved spectrum efficiency
Do nlink target (bits/sec/H /site)Downlink target (bits/sec/Hz/site)
• 3-4 times that of Release 6 HSDPA
Uplink target (bits/sec/Hz/site)
2 3 times that of Release 6 enhanced uplink• 2-3 times that of Release 6 enhanced uplink
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LTE Cost Advantages for GSM OperatorsOperators
Deployment of LTE on existing sites and sharing of common infrastructure (e.g. antenna masts; site infrastructure like power supply, air conditioning, and security equipment; feeder cables
and even antennas)
Sharing of backhauling equipment between LTE/SAE and existing network technologies provided at the same site
Common network management platforms
Source: Nokia Siemens
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LTE: Flat ArchitectureUMTS
Circuit SwitchedCore Network
RNC2MSC
Packet SwitchedCore Network
RNC1 SGSNNode B
lub interface lu-ps interface
Core Network
ENode BLTE
Evolved PacketCore Network
S1 InterfaceENode B Source: UMTS Forum
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Latency Improves with 3GPP EvolutionEvolution
Source: Peter Rysavy, 3G Americas
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Sector Throughput (Capacity)
Downlink 4X4 12 24 484X4 12 24 48
7.85 15.73.7Downlink 2X2 31.4
1.9
Downlink 1X1
Carrier2.25
Uplink
BW/MHz
0.8
3.7 6.3512.7
1.25 5 10 20
1.451.3S M t l NAT
LTEHSPA+HSPASources: Motorola, NAT, Peter Rysavy, CDG
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IMS: IP Multimedia Subsystem The Platform Driving ConvergenceThe Platform Driving Convergence
Network
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3GPP Evolution
HSDPA HSPA HSPA+
LTE
2006 2007 2008 20102009AT&T/UMTS Forum
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Clear Path to 4G/LTE AT&T Network Technology TimelineAT&T Network Technology Timeline
Initial HSPA+ Initial LTEHSPA
Initial HSPA+ Trials LTE Trials
Initial LTE Deployment
2008 2009 2010 2011
Page 18
Source: AT&T
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LTE Targets
•Peak data rates: at least 100 Mbps (DL) / at least 50 Mbps (UL)•Average user throughput: 3-4 times (DL), 2-3 times (UL) HSPA reference•Cell-edge user throughput: 2-3 times (DL & UL) HSPA reference
High data rates
• User plane: Less than 10 ms (RAN RTT)• Control plane: Less than 100 ms (idle → active)Low latency
• Three times HSPA R6 baseline• Improved performance for broadcast services
High spectral efficiency p pefficiency
• Less signaling, auto-configuration of eNodeBSimplicityp y
• Deployable in a wide range of different spectrum allocations of different sizesSpectrum
flexibility • Unpaired and paired spectrum, variable duplex distanceflexibilitySource: Ericsson
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A Global Commitment to LTE
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Thank you!
HSPA+ & LTE Executive BriefingHank Kafka, Vice President, Network Architecture, AT&T