lte – 4g technology in today’s spectrum - · pdf fileericsson confidential 1...

Ericsson Confidential 2009-04-201

LTE – 4G Technology in Today’s Spectrum

IEEE CVT Technical Luncheon SeriesApril 21, 2009

Hossam H’mimy, PhDDirector, Network and Technology StrategyStrategy & CTO office, Ericsson Inc.


Reported mobile subscriptionsSubscriptions & penetration by region, End Q2 2008E

Source: Estimates based on WCIS.

This slide contains forward looking statements

Global~4.1 B61%

Latin America450 M, 73%

North America290 M, 85%

Western Europe

560 M, 121%

Middle East150 M, 60%

Asia Pacific 1.7 B, 41%

Central &Eastern Europe

490 M, 102%

Africa390 M, 34%


0

500

1000

1500

2000

2500

3000

3500

2007 2008 2009 2010 2011 2012 2013 2014

Subs

crip

tions

(mill

ion)

Fixed Mobile

Mobile broadband

80% of Broadband subscribers are mobile in 2014

Mobile Broadband includes: CDMA2000 EV-DO, HSPA, LTE, Mobile WiMAX, TD-SCDMAFixed broadband includes: DSL, FTTx, Cable modem, Enterprise leased lines and Wireless Broadband Source: Ericsson Q4 2008


Agenda

Broadband Wireless Market LTE/SAE Technology update

– Global Support – Standards– Spectrum

Concluding remarks


Evolution: Technology, Business

WirelineHousehold/

business placeTelephony

MediaInternet

WirelessPeople

TelephonyMessaging

MediaInternet

FutureConnectionsNetworkingTelephony, messaging,

media, internet, control


MBB Statistics end of 2008Mobile Broadband Wireless 3.54B GSM/EDGE/WCDMA/HSPA subs (89% Global) ( 3.77B April 20,08)

– Subs (287M WCDMA ,82.8M HSPA)– Launched Networks

275 WCDMA N/W launched in 116 countries 259 HSPA N/W launched in 111 countries

- 185 HSDPA N/W with 3.6Mbps (71%) - 90 HSDPA N/W with 7.2Mbps- 71 HSUPA N/W

– HSPA Devices 1409 different devices launched from 169 suppliers

- 348 triband 850/1900/2100- 897 HSDPA 3.6Mbps devices- 492 HSDPA 7.2Mbps devices - 242 HSUPA Devices

CDMA 467.7M (455M 1x, 112M EvDo)– Networks (271 1X, 168 EvDo)– Devices (1141 1X, 646 EvDo)

evol HSPA– Launched: 2 Evol HSPA N/W– Commitments: 19 Evol HSPA


WCDMAWCDMAHSPAHSPA

eHSPA eHSPA

LTEeHSPALTE

eHSPA

2002 2005 2009/2010 2009/2010

384 kbps 3.6 Mbps 21/28/42 Mbps ~150 MbpsPeak rate

2007

7/14 Mbps

3GPP Mobile Broadband Speed Evolution

LTE EvolutionLTE Evolution

2014/2015

1 GbpsTarget

Availability


LTE is the Global standard for Next Generation – FDD and TDD

CDMA Track (3GPP2)

GSM Track (3GPP)

2001 2005 2008 2010

LTEFDD and TDD

GSM WCDMA HSPA

TD-SCDMA

CDMA One EVDO Rev A

Mobile System EvolutionGlobal Support


Global Commitment to LTE Globally 26 LTE commitments Commitments in NA **

– Verizon Wireless – Metro PCS – CenturyTel – Tellus– Bell Canada– Rogers – Cox – Aircell– AT&T Mobility – Leap Wireless – T‐Mobile USA – US Cellular

** Commitments http://www.3gamericas.org/documents/LTE%20Commitments%20Mar%202009.pdf* anticipated launch http://www.gsacom.com/downloads/pdf/lte_3gpp.php4

Vodafone


LTE

2004 2005 2006 2007 2008

Technical studiesSpecifications

L1

L2

L3

Perf requirements

UE conf test specs

January 2008, Rel-8 specifications approved December 2008, Rel-8 specification frozen

March 2009, ASN.1 code ready and backwards compatibility secured

LTE Standardization Update


LSTI : Industry Forum for LTE

Friendly customer trials

PR

2006 2007 2008 2009 2010

Public Relation work

Interoperability

Air-interface principles

IODT

IOT

Trials

Test of basic functions

Proof of ConceptSIMO MIMO

RRC Mobility

Trial StartFriendly customer trials

PR

2006 2007 2008 2009 2010

Public Relation work

Interoperability

Air-interface principles

IODT

IOT

Trials

Test of basic functions

Proof of ConceptSIMO MIMO

RRC Mobility

Trial Start

NGMN LSTI

And other sponsors

NGMN LSTI

And other sponsors


LTE Device IntroductionMultimode TDD/FDD device platforms are planned from several top tier vendors


LTE Enabled DevicesExamples


3GPP LTE Requirements

3GPP LTE Performance Targets Data rates

– Downlink: >100 Mbps– Uplink: >50 Mbps– Cell-edge data rates

2-3 x HSPA Rel. 6

Delay/latency– User plane RTT: <10 ms– Channel set-up: <100 ms

High spectral efficiency High Performance Broadcast

services Cost-effective migration


Field Results Validating Performance

Peak rates validated– 2*2 MIMO

170Mbps DL 56Mbps UL (16QAM)

– 4*4 MIMO 325Mbps DL

Multi-user performance Load in multi site networks Handover LatencyMultiple frequencies FDD and TDD


Key LTE Radio Access Features

LTE radio access– Downlink: OFDM– Uplink: SC-FDMA

Advanced antenna solutions– Diversity– Beam-forming– Multi-layer transmission (MIMO)

Spectrum flexibility– Flexible bandwidth– New and existing bands– Duplex flexibility: FDD and TDD

20 MHz1.4 MHz

SC-FDMA

OFDMA

TX TX


Downlink: Multi-layered OFDM– Channel-dependent scheduling and link adaptation in time and

frequency domain

Uplink: Single Carrier-FDMA – Higher uplink system throughput– Improved coverage and cell-edge performance– Lower terminal cost and improved battery life

Downlink Uplink

time

frequency

time

frequency

User 1User 2User 3

Transmission Schemes

IFFT Cyclic-prefi xinsertion

Cyclic-prefi xinsertion

OFDM modulatorDFT precoder

DFT IFFT


Physical Resources

Time domain structure:– 10 ms frame consisting of 10 subframes of length 1 ms– Each subframe consists of 2 slots of length 0.5 ms– Each slot consists of 7 OFDM symbols (6 symbols in case of extended CP)

Resource block (RB)– 12 subcarriers during one slot (180 kHz × 0.5 ms)

Resource element (RE)– One subcarier during one OFDM symbol– Modulation QPSK, 16QAM, 64QAM

One subframe (1 ms)

One slot (0.5 ms)

One frame (10 ms)

One resource element

12 sub-carriers

TCP Tu

Freque

ncy

Time


Improved UL performance and longer battery life SC-FDMA compared to ordinary OFDM

Single-carrier transmission in uplink enables low PAPR that gives more than 4 dB better link budget and reduced power consumption compared to OFDM

OR

Improved coverage( > 60% improvement )

Higher data rates( > 2.5 times improvement )

R M bps

2.5R Mbps

Reduced power consumptionLonger battery life


Bandwidth flexibility LTE physical-layer specification supports any bandwidth

in the range 6 RBs to 100 RBs in steps of one RB (1 RB=12×15 kHz)

6 RB (1.1 MHz)

100 RB (20 MHz)

Channel bandwidth BWChannel [MHz] 1.4 3 5 10 15 20

Transmission bandwidth configuration NRB

6 15 25 50 75 100


data1data2data3data4

TimeFrequency

User #1 scheduled

User #2 scheduled

1 ms

180 kHz

Time-frequency fading, user #1

Time-frequency fading, user #2

Channel-dependent Scheduling

HSPA – channel-dependent scheduling in time-domain only LTE – channel-dependent scheduling in time and frequency domains


Multi-Antenna Transmission Techniques

Diversity for improved system peformance

Beam-forming for improved coverage(less cells to cover a given area)

SDMA for improved capacity(more users per cell)

Multi-layer transmisson (”MIMO”) for higher data rates in a given bandwidth

The multi-antenna technique to use depends on what to achieve


UE CategoriesCategory 1 2 3 4 5

DL peak rate 10 50 100 150 300

UL peak rate 5 25 50 50 75

Max DL mod 64QAM

Max UL mod 16QAM 64QAM

Layers for spatial mux. 1 2 4


Current 3GPP Bands for LTE

1428-1453/1476-1501UMTS150011

1710-1770/2110-21703G Americas10

1750-1785/1845-18801700 (Japan) 9

US 700

GSM 900

IMT Extension

850 (Japan)

850

AWS (US & other)

GSM 1800

PCS 1900

IMT Core Band

”Identifier”

FDD

698-716/728-746777-787/746-756788-798/758-768704-716/734-746

12,13,1417

880-915/925-9608

2500-2570/2620-26907

830-840/875-8856

824-849/869-8945

1710-1755/2110-21554

1710-1785/1805-18803

1850-1910/1930-19902

1920-1980/2110-21701

Frequencies (MHz)Band

1880-1920China TDD 39

2570-2620IMT Extension Center Gap

38

China TDD

PCSCenter Gap

TDD 1900

TDD 2000

”Identifier”TDD

2300-240040

(1915)1910-193037

1850-19101930-1990

35,36

1900-19202010-2025

33,34

Frequencies (MHz)Band

LTE deployed in new and existing bands


LTE Spectrum FlexibilityUS Deployment

700MHz– Band 13 (Upper C) 10MHz FDD– Band 12 ( Lower 700)

C+B 5 & 10 MHz A+B 5 & 10MHz

AWS– A, B, F 10MHz

1900MHz, 850MHz– 1.4MHz, 3MHz spectrum constraint – 5,10MHz available spectrum

A B C

52

D E A B C

58 595453 5655 57

698 MHz 704 740734728722710

806MHz

C

Lower 700 MHz

60 61 62 63 64 65 66 67

752 782 788758

68 69

A

716 746 764

D C A DPublic Safety

770 776 794 800

Public Safety

Upper 700 MHz

B B

LTE provides solution for many Spectrum scenarios


Low OpEx from StartThrough Self Organizing Network - SON

S-opt

plan

deploy

maintainoptimize

S-heal

S-conf

Self-Configuration

Self-Optimization

Self-Healing


HSS • Maintain and provide subscription data• User Identification handling• Access Authorisation• Prov ide Keys for Authenticationand Encryption

• User Registration management• Maintain knowledge of used PDN GW

LTE architecture details

PDN GW

Serv GW

PCRF

LTE

S1-MME S1-U

S10

S11

S5/S8

SGi

Gx

ExternalIP networks

Rx

X2eNB

HSS

IMS

S6a

MME

MME• Authentication• NAS signalling• GW selection• Roaming (S6a to home HSS)• Bearer management• Idle mode tracking• Paging• Inter-MME and IRAT mobility• NAS Ciphering and Integrity protection

SAE GW

PDN GW part:

• External IP point of interconnect• IP address allocation• Packet routing & forwarding• Lawful intercept• Policy enforcement• In home or vistied network

S GW part• In v isited network in case of roaming• Intra-LTE mobility anchor• Packet routing & forwarding• Lawful intercept • LTE idle mode DL buffering • Charging per UE, PDN and QCI• Bearer bindings for PMIP S5/S8

PCRF

• Provides Serv ice Data Flow gating• Set QoS for each Service Data Flow• Define Charging for each Service Data Flow• Enables Bearer QoS Control• Correlation between Application and Bearer charging• Notification of bearer events to application function• Bearer bindings towards Serv -GW for PMIP based S5

eNodeB

• Cell resource management • Broadcast information • MME selection • Transfer of transparent NAS signalling• Routing of user data towards the S-GW• Intra-LTE handov er, inter-MME pool handover

initiation, inter-RAT handov er initiation• QoS realization • Security

S9


HSS

HLR

MMESGSN

PCRF

2G 3G

Gb Iu-C

S3

S4

S1-C S1-US12

S11

S10

SGi

S7

IP networks

S6a

Gr

SAE (EPC) architecture 3GPP operator

• Common GW for all accesses• Core network pooling for LTE access• Policy control also supporting LTE•Smooth interworking 2G/3G – LTE• 3G Direct Tunnel for HSPALTE

PDN GW

Serv GW

S5

SAE GW


SAE Architecture 3GPP2 operator

• Migration to 3GPP SAE architecture• Legacy CDMA terminal support in CDMA PDSN and HA• Smooth interworking 2G/3G - LTE•Policy control for both CDMA and LTE• Support for both GTP and PMIP for roaming

PCRF

S103

S1-C S1-U

S11

S10

SGi

Ty/S7a

IP networksS6a

LTE

S2a

MME

A10/A11 A10/A11S102

1xRTT EV-DO

S101

S6cIS-835

PDSNHSGW

S7PDN GW

Serv GW

S5 IETF, (GTP)

SAE GW

TaAAA

IS-835

P-P

S7c

HA

HSSAAA


LTE Success

Capital Protection

Easy UpgradeBackwards CompatibilitySpectrum

OPEX

Network PerformanceEase of OperationEase of ExpansionCost effeciencies

Revenue Price PlansService OfferingApplication Enablers

Performance

Speed, QualityUser FriendlinessApplications

Service Anytime, Anywhere, Any DeviceCoverage

RoamingVariety of Devices

Price

Service PlansAffordable Devices

Economies of Scale – LTE is Building on the Success of GSM/HSPA/EvDo

Techno-Economic Drivers of LTE SuccessClosing Remarks

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