LTE DemystifiedWhat is LTE and how does it work?

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Agendaz Intro to Broadband Concepts

Defining Broadband and Broadband Servicesz LTE Technology

LTE Features and Performance LTE Architecture LTE Radio Interface MIMO LTE Services and Voice Evolution Option to LTE Spectrum for LTESpectrum for LTE Deployment Benefits of LTE Q&A

3

Q&A

Introduction to Broadband Why is Wireless Broadband so important?

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Wireless Broadband Requirements

z Increasing Smartphone and don gle usa ge

5

g g gz More data applications available

Data is booming, but

1700%)Global data revenue and traffic growth, 2008r2013

1300%1500%1700%

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RevenueTraffic

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100%300%

2008 2009 2010 2011 2012 2013

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2008 2009 2010 2011 2012 2013

z More efficient technologies required to reduce the cost per bit

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z Candidate technologies are HSPA+ and LTE (or WiMAX?)

Typical Broadband Services

Messaging and Social Networking

telemetry and remote control

Messaging and Social Networking

Internet Connection

TV, VoD, Radio

Voice (VoIP)Voice (VoIP)Application Stores

7 Cloud Computing

Wireless Technology Evolution

LTE

TACS, NMT, AMPSVoice only

GSM, CDMA, UMTS, cdma2000

LTESuper Fast Data

4G?

LTE Advanced ?TDMAVoice, Data, Text

GPRS EDGE

UMTS, cdma2000Packet data, Multimedia

HSDPA HSUPA

Ultra Fast Data

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GPRS, EDGEPacket data

HSDPA, HSUPAFaster Data

LTE TechnologySo what is Long Term Evolution?

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Long Term Evolution LTE

LTE: - a new cellular radio standardallowing faster, more efficient transferof data enabling the next generationof data, enabling the next generation of mobile data services

z All new All IP, Mobile Wireless Broadband Networkz LTE is part of 3GPP evolutionz LTE is part of 3GPP evolutionz Can we call LTE 4G? Do people care?

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Mobile Technology Evolution LTE has evolved from early GSM technology Development was started by the European Telecom Standards Institute (ETSI) Development is now managed by 3 rd Generation Partnership Project (3GPP)

LTE i f R l 8 f h S ifi i LTE is part of Release 8 of the Specifications

GSM Phase 1Basic Voice

1991

GSM Phase 2+New Voice Codec

Further Optimizations

GSM Phase 2+R97/98

More GPRSEDGE1997

R4Core Network

Soft switch2000

R6HSUPAALL IP

R8LTE

R10LTE Advanced?

20121991 1995 1997 2000 2004 2008 2012

1993 1996 1999 2002 20061993GSM Phase 2Txt Messages

Basic Data

1996GSM Phase 2+

Release 96GPRS

1999R99

UMTS Radio Network

2002R5

HSDPAIMS

2006R7

HSPA+

2010R9

LTE Enhancements

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LTE PerformanceD t R t & B d idthz Data Rates & Bandwidth

z 3 4 times more capacity than HSxPA Release 6z 100 300Mbpsz 100 300Mbps

z Less time spent downloading content, LTE is a lot fasterz Greater number of mobiles connected to the network, Higher Capacity

D l (L t )z Delay (Latency )z 3 4 times less delay than HSxPA Release 6z 100mS Connection Setupz 100mS Connection Setupz 5 20mS roundtrip delay

z Much more responsive web browsingB tt i IP fz Better voice over IP performance

z Other LTE Benefits z Advanced Antenna technologies increase capacityg p yz Advanced Antenna technologies increase cell sizez All IP (packet data) network for faster, more efficient services

LTE I t k ith i ti GSM/UMTS t k

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z LTE can Interwork with existing GSM/UMTS networksz LTE supports multimedia broadcasting

LTE Data Performance, DownloadingTypical 3 5 minute YouTube clip

5 Megabytes of information

GPRS @ 40Kb 125GPRS @ 40Kbps 125s

EDGE GPRS @100Kbps 50sEDGE GPRS @100Kbps 50s

UMTS @ 384Kbps 13s

HSPA @1Mbps 5s average user data rate

LTE @ 5Mbps 1s average user data rate

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LTE Architecture (high level)New Access NetworkBase Station - Evolved Node BX2 interface for improved Handover and Interference ManagementBackhaul Connections are Critical CapacityBackhaul Connections are Critical, Capacity

Downlink Radio InterfaceOrthogonal Frequency Division Multiple Access (OFDMA)Improved Performance in Urban AreasMultiple In Multiple Out (MIMO)

Uplink Radio InterfaceUplink Radio InterfaceSingle Carrier Frequency Division Multiple Access (SC-FDMA)Good Urban Area PerformanceDesigned for Good Battery Life

eNB eNBX2eUTRAN UE

14eNB Evolved Node B;MME Mobility Management Entity; SGW Serving GatewayP-GW Packet Data Gateway UE User Equipment

MME d SGW PGW

LTE Architecture (high level)New Core Network Evolved Packet Core All IP for efficiency New Network Elements Designed to be Flexible and

MME and SGW Mobility Management Entity

Overall control of the UE and Data Sessions Handle Handovers and

PGW Packet Gateway

provides connection to external networks internet, IMS, WAP, MMS

Designed to be Flexible and Scalable Self Organising Network (SON)

Handle Handovers and Location Management

Serving Gateway Handles User Data Controlled by the MME

internet, IMS, WAP, MMS Manages the IP session for the User Equipment

SGWPGW S5 S1 USGWPGW

S11

S5 S1-U

eNB eNBX2eUTRAN UE

EPCAll IP

All New

MMES1-MME

15eNB Evolved Node B;MME Mobility Management Entity; SGW Serving GatewayP-GW Packet Data Gateway UE User Equipment

LTE Architecture (high level)InterworkingDefined interfaces for interworkingUMTS/GPRS interworkingWiFi/WiMAX I t kiWiFi/WiMAX InterworkingInterworking with Trusted/non-Trusted

UMTSWLAN

S3 S4 S12S2

SGWPGW S5 S1 U

S3,S4,S12S2

SGWPGW

S11

S5 S1-U

eNB eNBX2eUTRAN UE

EPCAll IP

All New

MMES1-MME

16eNB Evolved Node B;MME Mobility Management Entity; SGW Serving GatewayP-GW Packet Data Gateway UE User Equipment

LTE Architecture (high level)Connection to External NetworksIMS, MMS, WAP, Media Centers

IMS

SGi UMTSWLAN

S3 S4 S12S2

SGWPGW S5 S1 U

S3,S4,S12S2

SGWPGW

S11

S5 S1-U

eNB eNBX2eUTRAN UE

EPCAll IP

All New

MMES1-MME

17eNB Evolved Node B;MME Mobility Management Entity; SGW Serving GatewayP-GW Packet Data Gateway UE User Equipment

LTE Radio Interface OverviewKey FeaturesKey Features

z Flexible Bandwidth Options1 4 20 MHz 1.4 20 MHz

z High Order Modulation and Codingz QPSK, 16 QAM and 64 QAMQ S , 6 Q a d 6 Qz Adaptive modulation and coding

z Robust OFDMA in the DownlinkC

eNBeNBeNB

z Multi-Carrier Transmissionz Good Multipath Performancez Suited to Advanced Antenna Techniques

z Efficient SC-FDMA in the Uplinkz Still good Multipath Performancez Decoding complexity in the eNB UEz Decoding complexity in the eNBz More power efficient than OFDMA

z Advanced Antenna Support

UE

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z MIMO, 2x2, 4x4z Beamforming

LTE Radio Interface OverviewOFDMA and SC FDMAOFDMA and SC-FDMA

y

12 Sub-Carriers/RB

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Good Multipath Performance Simplified UE Receiver Scalable OFDMA Supports MIMO

Time

Supports MIMO

eNBeNBeNB UEc

y

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Single Carrier /RB Simplified UE Design

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Time

Lower power Consumption No MIMO

LTE Radio Interface OverviewMIMOMIMO

eNBeNBeNB UE

Downlink only 2 or 4 Transmit antennas at

the base station

Spatial Multiplexing increases data rate

Up to 4x increase in Capacity*

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2 or 4 Receive antennas at the UE

Requires an Urban Environment

Wont work every where