LTECongress Tokyo LTE-Advanced

3GPP Rel-10LTE-AdvancedTechnology Overview

Thomas MOOSBURGERHead of R&D 3G Protocol Testers

Email [email protected]

September 2010 | LTE-Advanced | 2

Outline3GPP Rel-10 LTE-Advanced Technology Overview

l Introductionl Motivationl Requirements

l Key Featuresl Carrier Aggregationl CoMPl Enhanded MIMO Schemesl Relayingl Enhanced UL SC-FDMAl Summary

l 3GPP Standardisation Statusl Test Equipmentl Conclusion & Further Information







Is LTE-Advanced another new Technology?

l Experience from GSM and WCDMA confirmsl The first release after introduction of a new technology includes only

few leftovers not finalized in the initial release.l The second release after introduction of a new technology includes

more significant features / improvements.

Specification freeze

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R99Rel-4

Rel-5

Rel-6


Is LTE-Advanced another new Technology?l The same holds true for LTEl Significant features will be added into LTE Rel-10 in order to

meet IMT-Advanced requirementsl In consequence LTE-Advanced is not a new technology but an

evolution of LTE Rel-8.

Specification freeze

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IMT-Advanced

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Rel-9

Rel-10


IMT-Advanced Key Requirements

l The ITU has coined the term IMT-Advanced to identify mobilebroadband systems whose capabilities go beyond those of IMT 2000.

l Requirementsl Enhanced peak data rates to support advanced services and applications

– 100 Mbps DL for high mobility– 1 Gbps DL / 500 Mbps UL for low mobility

l Increased spectrum efficieny (> 30 bps/Hz)

l Other requirements includel Compatibility of services within IMT and with fixed networks,l Capability of interworking with other radio access systems,l High quality mobile services,l User equipment suitable for worldwide use,l User-friendly applications, services and equipment,l Worldwide roaming capability,l Etc.


3GPP Release 10 and ITU Schedule

l 3GPP LTE-Advanced (Rel-10 and beyond) meets these requirements andhas been submitted as a candidate radio interface technology forIMT-Advanced.

l 3GPP and ITU standardisation schedule are aligned







Carrier Aggregation

LTE-AdvancedFeature overview MIMO (DL) 8x8

MIMO (UL) 4x4

EnhancedSC-FDMA

RelayingCoMP

CoordinatedMultiple PointTransmission &Reception


l Wider LTE transmission bandwidth by aggregating severalfrequency blocks (component carriers)l Support for contiguous (inter-band) and non-contiguous (intra-band)

component carriersl Up to 100 MHz transmission bandwidth when aggregating 5 component

carriersl Each component carrier is backwards compatible with Rel-8 LTE

l Benefitsl High peak data rate of 1 Gbpsl Backwards compatible with Rel-8 LTEl Flexible spectrum usage and deployment

LTE-AdvancedCarrier Aggregation – Basics

LTE bandwidth

Frequency

Aggregated bandwidth

Contiguous component carriers Non-contiguous component carriers


LTE-AdvancedCarrier Aggregation - Deployment

l Initial LTE-Advanced deployments will likely be limited tothe use of two component carriers

l 3GPP have identified 4 deployment scenarios


LTE-AdvancedCarrier Aggregation - Details

l Primary cell / secondary celll Activation / de-activation of CCsl Scheduling

l Parallel transmission of multiplecomponent carriers

l There is one transport block (inabsence of spatial multiplexing) andone HARQ entity per scheduledcomponent carrier (from the UEperspective),

l Two different approaches arediscussed how to inform the UE aboutthe scheduling for each band,– Separate PDCCH for each carrier,– Common PDCCH for multiple carrier,

l UL: Parallel transmission of multipleRel-8 component carriers

Non-Contiguous spectrum allocationContiguous spectrum allocation

Datamod.

Mapping

Channelcoding

HARQ

Datamod.

Mapping

Channelcoding

HARQ

Datamod.

Mapping

Channelcoding

HARQ

Datamod.

Mapping

Channelcoding

HARQ

Dynamicswitching

RLC transmission buffer

[frequency in MHz]

e.g. 20 MHz


LTE-AdvancedCoMP - Basicsl Coordinated multiple point transmission & receptionl CoMP aims to turn the inter-cell interference into a useful signal

specifically at the cell border to enhance cell edge throughput

Multiple geographically separated eNBs


LTE-AdvancedCoMP - Basics

Data transmitted from oneeNB but user scheduling /beamforming decisions aremade with coordinationamong cells

Data transmittedfrom one eNB at atime

Data transmittedsimultaneously frommultiple eNBs

Data available at serving cellonly

Data available at each transmission point

Dynamic cellselection

Joint transmission

Coordinated Scheduling /Beamforming

Joint Processing

CoMP – Transmission (Downlink)

Scheduling is coordinatedamong cells

UE UL signal (PUSCH) is received andprocessed by multiple eNBs

CoMP – Reception (Uplink)


LTE-AdvancedEnhanced MIMO Schemes

l LTE-Advanced specifiesl Up to MIMO 8x8 in downlinkl Up to MIMO 4x4 in uplinkl to increase spectrum efficiency

and throughput

l Downlink reference signal structure enhancedl UE specific demodulation reference signal (DM-RS) targeting PDSCH

demodulationl Cell specific channel state information reference signal (CSI-RS)

for CQI, PMI, RI

l New Rel-10 specific uplink transmission modesl single antenna port model multi antenna port mode


LTE-AdvancedRelaying

l Relaying enhances cell coverage and capacityl UE communicates with a relay eNB, which in turn

communicates with a donor eNBl LTE-Advanced defines 2 types of relay nodes

Type 2Type 1

Inband relay nodeOutband relay node


LTE-AdvancedEnhanced uplink SC-FDMA

l The uplink transmissionscheme in Rel-10LTE-Advanced remainsSC-FDMA.

l Two enhancementsl Control-data decoupling

(simultaneous PUSCHand PUCCH transmission)

l Non-contiguousdata transmission(clusters of subcarrierscan be allocated)







3GPP Rel-10 Standardisation Status

12.09 3.10 6.10 9.10 12.10 3.11 6.11

#46 #47 #48 #49 #50 #51 #52

ExpectedFunctional

freezeIn RAN1

RAN1 has to complete theirspecification by Sept. 10(only 9 month)

RAN2/3/4 have to completetheir specification by Dec.10 (only 12 month) reflectingRAN1 agreements

Core specFunctional

freeze

ASN.1freeze

2009 2010 2011

3GPP Rel-10 SpecificationsTS36.912

Feasibility study for FurtherAdvancements for E-UTRA(LTE-Advanced)

TS 36.913Requirements for furtheradvancements for E-UTRA(LTE-Advanced)

TS 36.814Further Advancements for E-UTRA, Physical LayerAspects

TS 36.300Stage 2 description of LTE-Advanded

3GPP Rel-10 SpecificationsTS36.912

Feasibility study for FurtherAdvancements for E-UTRA(LTE-Advanced)

TS 36.913Requirements for furtheradvancements for E-UTRA(LTE-Advanced)

TS 36.814Further Advancements for E-UTRA, Physical LayerAspects

TS 36.300Stage 2 description of LTE-Advanded

RANmeeting







Solutions for the Mobile Device / Chip Set Industry

R&S LTE product portfolio will be upgradedto support LTE-Advanced features and test

requirements for R&D, certificationand operator testing.First test solutionsare available now.

R&S LTE product portfolio will be upgradedto support LTE-Advanced features and test

requirements for R&D, certificationand operator testing.First test solutionsare available now.


LTE–Advanced Test Solutions from R&STest Setup for Band Aggregation


LTE–Advanced Test Solutions from R&SR&S® FSQ Signal Analyser

Ref -20 dBm Att 5 dB

RBW 2 MHzVBW 5 MHzSWT 2.5 ms

Center 2.17 GHz Span 100 MHz10 MHz/

1 APCLRWR

A

3DB

EXT

-120

-110

-100

-90

-80

-70

-60

-50

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-30

-20

Date: 8.OCT.2009 14:13:24

20 MHzE-UTRA carrier 2

fc,E-UTRA carrier 2 = 2205 MHz

-10 dB

20 MHzE-UTRA carrier 2

fc,E-UTRA carrier 2 = 2135 MHz








Conclusion

l LTE-Advanced is an evolution of LTE and meets or exceedsIMT-Advanced key requirements within the ITU-R timeplan.

l LTE-Advanced will be the innovation platform for the cellularindustry for the next decade.

l 3GPP Release 10 standardisation for LTE-Advanced is ontrack and will be completed in March 2011.

l The LTE chipset, mobile terminal and infrastructure industryhas started working on LTE-Advanced.

l First LTE-Advanced test solutions are available from Rohde& Schwarz.

l LTE-Advanced is an evolution of LTE and meets or exceedsIMT-Advanced key requirements within the ITU-R timeplan.

l LTE-Advanced will be the innovation platform for the cellularindustry for the next decade.

l 3GPP Release 10 standardisation for LTE-Advanced is ontrack and will be completed in March 2011.

l The LTE chipset, mobile terminal and infrastructure industryhas started working on LTE-Advanced.

l First LTE-Advanced test solutions are available from Rohde& Schwarz.


Further Information on LTE-AdvancedRead more atwww.rohde-schwarz.com

Read more atwww.rohde-schwarz.com

http://www.rohde-schwarz.com/appnote/1MA166

http://www.rohde-schwarz.com/appnote/1MA169

http://www2.rohde-schwarz.com/en/technologies/cellular_standards/LTE/?_view=downloads&downloadtype=69


Thank youfor your attention

LTECongress Tokyo LTE-Advanced

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