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LTE-Advanced

[email protected]

LG

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LTE-AdvancedLTE-Advanced2

Contents

Generals on LTE-Advanced Overview of LTE-Advanced Technologies

More details on LTE-Advanced Component

Technologies

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LTE-Advanced : Generals

Definition of LTE-Advanced

Major milestones for LTE-Advanced

Requirements and targets for LTE-Advanced Current status of LTE-Advanced

Self Evaluation Results

Bands identified for IMT-Advanced

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LTE-Advanced

3GPP specification releases

1999 2000 2001 2002 2003 2004 2005

Release 99

Release 4

Release 5

Release 6

1.28Mcps TDD

HSDPA, IMS

W-CDMA

HSUPA, MBMS, IMS+

2006 2007 2008 2009

Release 7 HSPA+ (MIMO, HOM etc.)

Release 8

2010 2011

LTE, SAE

ITU-R M.1457

IMT-2000 Recommendations

Release 9

LTE-AdvancedRelease 10

GSM/GPRS/EDGE enhancements

Small LTE/SAE

enhancements

Cited from 3GPP, RP-091005, Proposal for Candidate Radio Interface Technologies for IMT-Advanced Based on LTE Release 10 and Beyond

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LTE-Advanced5

Definitions

What is IMT-Advanced? A family of radio access technologies fulfilling IMT-Advanced

requirements

Relates to 4G as IMT-2000 relates to 3G

IMT spectrum will be available to both IMT-2000 and IMT-Advanced

What is LTE-Advanced? System now under study in 3GPP aiming toward IMT-Advanced within

WP5D time line

Formal name: Advanced E-UTRA /Advanced E-UTRAN Evolution from 3GPP LTE specifications, not a revolution

Comparable potential of 3GPP LTE with target requirements of IMT-advanced Fast and efficient correspondence against the timeline of WP5Ds specification

and commercialization for IMT-advanced Cost-efficient support for backward and forward compatibility between LTE and

LTE-A Natural evolut ion of LTE (LTE release 10 & beyond)

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LTE-Advanced

Detailed Timeline for ITU-R

3/08 6/08 12/08 3/09 5/09 9/09 12/09 3/109/08

LTE-AdvancedSI Approved

3GPP LTE-Advanced

EarlySubmission to

ITU-R

Steps 1 & 2

Circular Letter & Development of Candidate RITs3/08 to 10/09

IMT-AdvancedEvaluationGroup(s)Formed

(notify ITU-R)

3GPP

Initiate3GPP LTE-Advanced

Self-Evaluation

3GPP LTE-Advanced FinalSubmission toITU-R including

Updated

TechnicalSubmission &Required Self-

Evaluation

LTE-Advanced

Specifications

3GPP LTE-AdvancedCompleteTechnical

Submission toITU-R

Step 3

Submission

3/09 to 10/09

Step 4

Evaluations

1/09 to 6/10

3/08 6/08

10/09

10/09

6/103/09

ITU-R

Detailed Timelines for ITU-R Steps 1- 4

3/09

LTE-Advanced

Specificationsto ITU-R

~J an 2011

Evaluation ofITU-R

Submissions

EvalReports

ITU-R CircularLetter 5/LCCE/2

Process &Timelines

ITU-R Circular

Letter Addendum5/LCCE/2 +

Requirements& SubmissionTemplates

Cutoff forEvaluation Reports

to ITU-RJ une 2010

INDUSTRY

RAN #41 RAN #42 RAN #43RAN #39 RAN #44RAN #40 RAN #45

WP 5D #1 WP 5D #2

WP 5D #4

WP 5D #8

WP 5D #6

WP 5D #4 WP 5D #6

RAN #47RAN #46

[~Release 10 ]

[~RAN #50 12/10]

6/09WP 5D #5

10/08WP 5D #3

5 Source: RP-080651

ITU-REvaluation

Criteria

3GPP work on ITU-R Step 2Technology Development

3GPP work on ITU-R Step 3Technology Submission

3GPP Q&A withevaluation

groups(as required)

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LTE-Advanced

IMT-Advanced Process

Steps in radio interface development process:

Step1 and 2

No.1 No.2 No.3 No.4 No.5 No.6 No.7 No.8 No.9

Step 3

(0)

(1)

(20 months)

Step 4

(8 months)

(16 months) (2)

Steps 5,6 and 7

(3)Steps 8

(4)(12 months)

(20 months)

WP 5D

meetings

Step 1: Issuance of the circular letter

Step 2: Development of candidate RITs and SRITs

Step 3: Submission/Reception of the RIT and SRIT proposals

and acknowledgement of receipt

Step 4: Evaluation of candidate RITs and SRITs

by evaluation groups

Step 5: Review and coordination of outside evaluation activities

Step 6: Review to assess compliance with minimum requirements

Step 7: Consideration of evaluation results, consensus building

and decision

Step 8: Development of radio interface Recommendation(s)

Critical milestones in radio interface development process:

(0): Issue an invitation to propose RITs March 2008

(1): ITU proposed cut off for submission October 2009

of candidate RIT and SRIT proposals

(2): Cut off for evaluation report to ITU June 2010

(3): WP 5D decides framework and key October 2010

characteristics of IMT-Advanced RITs and SRITs

(4): WP 5D completes development of radio February 2011

interface specification Recommendations

2008 2009 2010No.10

2011

IMT-Advanced A2-01

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LTE-Advanced

Major Milestones for LTE-Advanced

Major milestones for LTE-Advanced in 3GPP

1st workshop in November 2007 Cancun Approval of LTE-Advanced study item: Rapporteur: NTT DoCoMo 2nd workshop in April 2008 Shenzhen

3rd workshop in May 2008 Prague Approval of LTE-A requirement TR: TR 36.913 v8.0.0 approved in RAN#40 in May Early proposal to ITU-R WP5D in October 2008 Complete submission to ITU-R in J une 2009 (WP5D #5) Approval for RAN TR (TR 36.912) for ITU-R submission in September, 2009

Final proposal update to ITU-R in October 2009 (WP5D #6) Study item completion in March 2010

LTE-Advanced function block work items started in December, 2009, irrespective of completion for LTE-Advanced study item

Initial approval of LTE-A (Rel-10 specification) will be done in December, 2010 Functional freezing will be done at the same time in December next year

ASN.1 freezing is expected to be done in March or June 2011

ITU-R WP5D ProposalsEvaluation

Consensus

Specification

LTE Rel.9 LTE Rel.10 [LTE Rel.11]

LTE-A SI

2009 2010 2011Complete Tech

Final Submission

Standard Roadmap

3GPPLTE-A LTE-A Functional Work Items

[LTE Rel.12]

2012

Beyond LTE-A SI

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LTE-Advanced

Agreed upon Time Plan for Rel-10

12.09 3.10 6.10 9.10 12.10 3.11 6.11

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

Expected

Functional

freeze

In 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

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LTE-Advanced

Documents Related to LTE-Advanced

TR (Technical Report)TR 36.806

Technical report for relay architecture

TR 36.814 (RAN1 technical report)

Evolved Universal Terrestrial Radio Access (E-UTRA); Further

advancements for E-UTRA Physical layer aspectsTR 36.815

LTE-Advanced feasibility studies in RAN WG4

TR 36.912 (RAN technical report)

Feasibility study for Further Advancements for E-UTRA (LTE-

Advanced)

TR 36.913

Requirements for further advancements for Evolved UniversalTerrestrial Radio Access (E-UTRA)

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LTE-Advanced

RAN TR for LTE-Advanced

TR 36.912: RAN plenary TR for LTE-Advanced study item RP-090743: TR36.912 v9.0.0 Approved in RAN #45 Will be submitted to ITU-R after PCG approval

Contents1. Scope2. References3. Definitions, symbols and abbreviations4. Introduction

5. Support of wider bandwidth6. Uplink transmission scheme7. Downlink transmission scheme8. CoMP9. Relaying10. Improvement for latency11. Radio transmission and reception12. Mobility enhancements13.TS 36.133 requirements enhancements

14. MBMS enhancements15. SON enhancements16. Self-evaluation report on LTE Rel.10 & beyond (LTE-Advanced)Annexs

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LTE-Advanced

Requirements for LTE-Advanced [1]

General requirement LTE-Advanced is an evolution of LTE

LTE-Advanced shall meet or exceed IMT-Advancedrequirements within the ITU-R time plan

Extended LTE-Advanced targets are adopted

System

Performance

IMT-Advancedrequirements and time plan

Rel. 8 LTE

LTE-Advanced

targets

Time

Cited from 3GPP, RP-091005, Proposal for Candidate Radio Interface Technologies for IMT-Advanced Based on LTE Release 10 and Beyond

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LTE-Advanced


Comparison between IMT-Advanced and LTE-Advanced

LTE-Advanced should at least fulfill or exceed IMT-Advanced requirements

ITU Requirement 3GPP Requirement

Peak data rates1Gbps in DL

500Mbps in UL

Bandwidth 40MHz (scalable BW) Up to 100MHz

User plane latency 10ms Improved compared to LTE

Control plane latency 100msActive Active dormant(

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LTE-Advanced


System performance requirements for IMT-Advanced

ITU system performance requirement

Enviromnet Indoor Micro-cell

Base

coverage

Urban

Rural/

High speed

Spectrum

Efficiency

DL

(4x2 MIMO)3 2.6 2.2 1.1

UL

(2x4 MIMO)2.25 1.8 1.4 0.7

Cell EdgeSpectrum

Efficiency

DL

(4x2 MIMO) 0.1 0.075 0.06 0.04

UL

(2x4 MIMO)0.07 0.05 0.03 0.015

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LTE-Advanced


System Performance Requirements from TR 36.913

Peak Spectral Efficiency: DL 30bits/Hz (8x8 MIMO), UL 15bps/Hz (4x4 MIMO)

Seem to be easily achievable by means of extended utilization of #of antennas

Average Spectral Efficiency (SE) and Edge Spectral Efficiency for LTE Case-1 System performances of LTE Rel-8 are about 30% ~ 70% lower than 3GPP target

What would be key enabling technologies to fil l up the gap between two?

Case-1

Ant. Config

LTE

Cell Avg. SE

[bps/Hz/cell]

(3GPP R1-072580)

LTE-ADV

Cell Avg. SE

[bps/Hz/cell]

(3GPP TR36.913)

LTE

Cell Edge SE

[bps/Hz/user]

(3GPP R1-072580)

LTE-ADV

Cell Edge SE

[bps/Hz/user]

(3GPP TR36.913)

UL1x2 0.735 1.2 0.024 0.04

2x4 - 2.0 - 0.07

DL

2x2 1.69 2.4 0.05 0.07

4x2 1.87 2.6 0.06 0.09

4x4 2.67 3.7 0.08 0.12

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LTE-Advanced

Frequency Bands Identified for LTE-A

WRC 07 identified some new IMT spectrum that is now under band planning

There should be either a clear FDD band plan or TDD band plan

3300 3400 3500 3600 3700 3800 3900 4000 4100 4200 4300 4400 4500 4600 4700 4800 4900 5000

1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900

2025 21102170

26901710

100 500 600 700 800 900 1000200 300 400

5150 470890915

925960806450 790

698

New for IMT in somecountries of

Regions 1 & 3

New

Region 2

NewGlobal

ExistingIMT

identified

IMT bands can be used by all IMT-2000 and IMT-Advanced technologies

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LTE-Advanced

Current Status of LTE-Advanced

Status related to IMT-Advanced submission Early proposal in October 2008

Main purpose was to inform ITU-R of 3GPPs resolution for IMT-Advanced and provideupdated status of LTE-Advanced to ITU-R

Complete technology submission in J une 2009 Initial proposal submission from 3GPP Compliant with the formal form of submissition requested by ITU-R Separate RIT for FDD and TDD

Performance results were not included in the submission Final submission in October 2009

Final proposal update to ITU-R Self evaluation results for LTE-Advanced were included

Status of LTE-Advanced in 3GPP Study item has been formally completed in last RAN plenary meeting in March Several new work items with respect to LTE-Advanced were created, targetting

Rel10 time frame Carrier aggregation work item: created in December 2009 Enhanced DL MIMO work item: created in December 2009 UL MIMO work item: created in December 2009 Relay work item: created in December 2009 Enhanced ICIC for non-ca based HetNet: created in March 2010

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LTE-Advanced

Self-Evaluation Activities in 3GPP

RAN1 activities with respect to self evaluations for LTE-Advanced List of companies who submitted self evaluation results:

Alcatel-Lucent, CATT, CMCC, Ericsson, Fujitsu, Hitachi, Huawei, LGE,Motorola, NEC, Nokia, NTT DOCOMO, Panasonic, Qualcomm, RITT,Samsung, Texas Instruments, ZTE

How to capture self evaluation results from a lot of companies Since different companies have somewhat different assumptions on the

overhead, the group had to make decision on the common assumption for theoverhead so that the results from different companies can be comparable witheach other

What kinds of features should be prioritized? LTE-Advanced is based on LTE Rel.8 and it is the long term evolution of LTE, thus It is good to inform that LTE Rel.8 can fulfill the most of requirements without any

enhanced techniques. It is also good to inform that only small updates from Rel.8 can fulfill the requirements

even in the very tough conditions (UMi and Uma). Thus, Rel-8 performance is captured if it fulfill s the requirements. If Rel-8 cannot meet the req. , we should pr ior itize ones wi th small extension

from Rel-8, i.e., DL: Rel-8 >MUMIMO >CS/BF-CoMP and J P-CoMP

UL: Rel-8 >MUMIMO, SUMIMO and CoMP

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LTE-Advanced

Summary of Self-Evaluation Results

From the self evaluation activities, it was found that

For LTE Release 10, FDD RIT Component meets the minimum requirements of all 4 required test

environments

TDD RIT Component meets the minimum requirements of all 4 required testenvironments

The complete SRIT meets the minimum requi rements of all 4 required testenvironments.

Baseline configuration exceeding ITU-R requirements with minimum extension LTE release 8 fulfills the requirements in most cases (no extensions needed)

Extensions to Multi-user MIMO from Release 8 fulfills the requirements in some scenarios(Urban Macro/Micro DL)

More advanced configurations, e.g. CoMP, with further enhanced performance

Many (18) companies perticipated in the simulations, ensuring high reliability Self evaluation reports are captured in section 16 of Technical Report TR 36.912

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LTE-Advanced

Self-Evaluation Results [1]

Peak spectrum efficiency

DL peak spectrum efficiency

UL peak spectrum efficiency

SchemeFDD spectral efficiency

(bps/Hz)

TDD spectral efficiency

(bps/Hz)

ITU requirement 15 15

Rel-8 4 layer spatial multiplexing 16.3 16.0

8 layer spatial multiplexing 30.6 30.0

SchemeFDD spectral efficiency

(bps/Hz)

TDD spectral efficiency

(bps/Hz)

ITU requirement 6.75 6.75



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LTE-Advanced


Indoor Hotspot / downlink / FDD

LTE Rel-8 meets the requirement

Indoor Hotspot / downlink / TDD LTE Rel-8 meets the requirement

Scheme and antenna

conf.

ITU

requirement

(Ave./Edge)

Number

of

samples

Cell average Cell edge

L=1 L=2 L=3 L=1 L=2 L=3

Rel-8 SU-MIMO4X2 (A)

3 / 0.1 15 4.8 4.5 4.1 0.23 0.21 0.19

MU-MIMO4X2 (C)

3 / 0.1 3 6.6 6.1 5.5 0.26 0.24 0.22

Scheme and antenna

conf.

ITU

requirement(Ave./Edge)

Number

ofsamples


L=1 L=2 L=3 L=1 L=2 L=3

Rel-8 SU-MIMO4X2 (A)

3 / 0.1 10 4.7 4.4 4.1 0.22 0.20 0.19

MU-MIMO4X2 (C)

3 / 0.1 4 6.5 6.1 5.7 0.23 0.22 0.20

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LTE-Advanced


Indoor Hotspot / upl ink / FDD


Indoor Hotspot / upl ink / TDD


Scheme and antenna conf.ITU requirement

(Ave./Edge)

Number of

samplesCell average Cell edge

Rel-8 SIMO 1X4 (A) 2.5 / 0.07 13 3.3 0.23

Rel-8 SIMO 1X4 (C) 2.5 / 0.07 10 3.3 0.24

Rel-8 MU-MIMO 1X4 (A) 2.5 / 0.07 2 5.8 0.42SU-MIMO 2X4 (A) 2.5 / 0.07 5 4.3 0.25


(Ave./Edge)

Number of

samples


Rel-8 SIMO 1X4 (A) 2.5 / 0.07 9 3.1 0.22

Rel-8 SIMO 1X4 (C) 2.5 / 0.07 7 3.1 0.23

Rel-8 MU-MIMO 1X4 (A) 2.5 / 0.07 2 5.5 0.39

SU-MIMO 2X4 (A) 2.5 / 0.07 2 3.9 0.25

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LTE-Advanced


Urban Micro/downlink/FDD:Single cell MU-MIMO meets the requirement

Urban Micro/downlink/TDD: single cell MU-MIMO (4x2) meets the requirement

Scheme and antenna

conf.

ITUrequirement

(Ave./Edge)

Numberof

samples


L=1 L=2 L=3 L=1 L=2 L=3

MU-MIMO 4X2 (C) 2.6 / 0.075 8 3.5 3.2 2.9 0.11 0.096 0.087

MU-MIMO 4X2 (A) 2.6 / 0.075 3 3.4 3.1 2.8 0.12 0.11 0.099

CS/BF-CoMP 4X2 (C) 2.6 / 0.075 5 3.6 3.3 3.0 0.11 0.10 0.089

J P-CoMP 4X2 (C) 2.6 / 0.075 1 4.5 4.1 3.7 0.14 0.13 0.12

MU-MIMO 8X2 (C/E) 2.6 / 0.075 4 4.2 3.8 3.5 0.15 0.14 0.13

Scheme and antenna

conf.

ITU

requirement

(Ave./Edge)

Number

of

samples


L=1 L=2 L=3 L=1 L=2 L=3

MU-MIMO 4X2 (C) 2.6 / 0.075 8 3.4 3.2 3.0 0.10 0.096 0.089

MU-MIMO 4X2 (A) 2.6 / 0.075 1 3.1 2.9 2.7 0.11 0.10 0.095

CS/BF-CoMP 4X2 (C) 2.6 / 0.075 3 3.5 3.3 3.1 0.099 0.092 0.086

J P-CoMP 4X2 (C) 2.6 / 0.075 1 4.5 4.2 3.9 0.098 0.092 0.085

MU-MIMO 8X2 (C/E) 2.6 / 0.075 4 4.1 3.9 3.6 0.11 0.11 0.10

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LTE-Advanced


Urban Micro / uplink / FDD: LTE Rel-8 meets the requirement

Urban Micro / upl ink / TDD: LTE Rel-8 meets the requirement


(Ave./Edge)

Number of


Rel-8 SIMO 1X4 (C) 1.8 / 0.05 13 1.9 0.072

Rel-8 MU-MIMO 1X4 (A) 1.8 / 0.05 2 2.5 0.077

MU-MIMO 2X4 (A) 1.8 / 0.05 1 2.5 0.086


(Ave./Edge)

Number of


Rel-8 SIMO 1X4 (C) 1.8 / 0.05 9 1.9 0.070

Rel-8 MU-MIMO 1X4 (A) 1.8 / 0.05 2 2.3 0.071

MU-MIMO 2X4 (A) 1.8 / 0.05 1 2.8 0.068

MU-MIMO 1X8 (E) 1.8 / 0.05 1 3.0 0.079

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LTE-Advanced


Urban Macro / downlink / FDD: Single cell MU-MIMO (4x2) meets the requirement

Urban Macro / downlink / TDD: Single cell MU-MIMO (4x2) meets the requirement

Scheme and antenna

conf.

ITU

requirement

(Ave./Edge)

Number

of

samples


L=1 L=2 L=3 L=1 L=2 L=3

MU-MIMO 4X2 (C) 2.2 / 0.06 7 2.8 2.6 2.4 0.079 0.073 0.066

CS/BF-CoMP 4X2 (C) 2.2 / 0.06 6 2.9 2.6 2.4 0.081 0.074 0.067

JP-CoMP 4X2 (A) 2.2 / 0.06 1 3.0 2.7 2.5 0.080 0.073 0.066

CS/BF-CoMP 8X2 (C) 2.2 / 0.06 3 3.8 3.5 3.2 0.10 0.093 0.085

Scheme and antenna conf.

ITU

requirement

(Ave./Edge)

Number

of

samples


L=1 L=2 L=3 L=1 L=2 L=3

MU-MIMO 4X2 (C) 2.2 / 0.06 7 2.8 2.6 2.4 0.076 0.071 0.067

CS/BF-CoMP 4X2 (C) 2.2 / 0.06 4 2.8 2.6 2.4 0.082 0.076 0.071

JP-CoMP 4X2 (C) 2.2 / 0.06 1 3.5 3.3 3.1 0.087 0.082 0.076

CS/BF-CoMP 8X2 (C/E) 2.2 / 0.06 3 3.5 3.3 3.1 0.10 0.093 0.087

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LTE-Advanced


Urban Macro / uplink / FDD LTE Rel-8 meets the requirement

Urban Macro / uplink / TDD



(Ave./Edge)

Number of


Rel-8 SIMO 1X4 (C) 1.4 / 0.03 12 1.5 0.062

CoMP 1X4 (A) 1.4 / 0.03 2 1.7 0.086

CoMP 2X4 (C) 1.4 / 0.03 1 2.1 0.099


(Ave./Edge)

Number of


Rel-8 SIMO 1X4 (C) 1.4 / 0.03 9 1.5 0.062

CoMP 1X4 (C) 1.4 / 0.03 1 1.9 0.090

CoMP 2X4 (C) 1.4 / 0.03 1 2.0 0.097

MU-MIMO 1X8 (E) 1.4 / 0.03 1 2.7 0.076

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LTE-Advanced


Rural Macro / downlink / FDD: LTE Rel-8 meets the requirement

Rural Macro / downlink / TDD: LTE Rel-8 meets the requirement


ITU

requirement

(Ave./Edge)

Number

of

samples


L=1 L=2 L=3 L=1 L=2 L=3

Rel-8 SU-MIMO 4X2 (C) 1.1 / 0.04 15 2.3 2.1 1.9 0.081 0.076 0.069

Rel-8 SU-MIMO 4X2 (A) 1.1 / 0.04 14 2.1 2.0 1.8 0.067 0.063 0.057

MU-MIMO 4X2 (C) 1.1 / 0.04 3 3.9 3.5 3.2 0.11 0.099 0.090

MU-MIMO 8X2 (C) 1.1 / 0.04 1 4.1 3.7 3.4 0.13 0.12 0.11


ITU

requirement

(Ave./Edge)

Number

of

samples


L=1 L=2 L=3 L=1 L=2 L=3

Rel-8 SU-MIMO 4X2 (C) 1.1 / 0.04 8 2.0 1.9 1.8 0.072 0.067 0.063

Rel-8 SU-MIMO 4X2 (A) 1.1 / 0.04 7 1.9 1.7 1.6 0.057 0.053 0.049

MU-MIMO 4X2 (C) 1.1 / 0.04 4 3.4 3.2 3.0 0.095 0.089 0.083

MU-MIMO 8X2 (C/E) 1.1 / 0.04 2 3.9 3.6 3.4 0.11 0.11 0.10

Rel-8 single-layer BF 8X2 (E) 1.1 / 0.04 4 2.4 2.3 2.1 0.11 0.10 0.093

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LTE-Advanced


Rural Macro / uplink / FDD: LTE Rel-8 meets the requirement

Rural Macro / uplink / TDD: LTE Rel-8 meets the requirement


(Ave./Edge)

Number of


Rel-8 SIMO 1X4 (C) 0.7 / 0.015 11 1.8 0.082

Rel-8 MU-MIMO 1X4 (A) 0.7 / 0.015 2 2.2 0.097

CoMP 2X4 (A) 0.7 / 0.015 2 2.3 0.13


(Ave./Edge)

Number of


Rel-8 SIMO 1X4 (C) 0.7 / 0.015 8 1.8 0.080

Rel-8 MU-MIMO 1X4 (A) 0.7 / 0.015 2 2.1 0.093

CoMP 2X4 (A) 0.7 / 0.015 1 2.5 0.15

MU-MIMO 1X8 (E) 0.7 / 0.015 1 2.6 0.10

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LTE-Advanced


VoIP capacity: Rel-8 LTE meets all the requirements

Antenna

conf.Scenarios

ITU

requirement

FDD TDD

Number of

samples

Capacity

(user/MHz/cell)

Number of

samples

Capacity

(user/MHz/cell)

(A)

Indoor Hotspot 50 3 140 2 137

Urban Micro 40 3 80 2 74

Urban Macro 40 3 68 2 65

Rural Macro 30 3 91 2 86

(C)

Indoor Hotspot 50 3 131 3 130

Urban Micro 40 3 75 3 74

Urban Macro 40 3 69 3 67

Rural Macro 30 3 94 3 92

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LTE-Advanced


Mobility Traffic Channel Link Data Rates

Rel-8 LTE can meet all the requirements

LOS/

NLOSScenarios

ITU

requirement

Median

SINR

(dB)

FDD TDD

Number of

samples

UL spectrum

efficiency

(bps/Hz)

Number of

samples

UL spectrum

efficiency

(bps/Hz)

Antenna conf.

1X4, NLOS

Indoor Hotspot 1.0 13.89 7 2.56 4 2.63

Urban Micro 0.75 4.54 7 1.21 4 1.14

Urban Macro 0.55 4.30 7 1.08 4 0.95

Rural Macro 0.25 5.42 7 1.22 4 1.03

Antenna conf.

1X4, LOS

Indoor Hotspot 1.0 13.89 4 3.15 2 3.11

Urban Micro 0.75 4.54 4 1.42 2 1.48

Urban Macro 0.55 4.30 4 1.36 2 1.36

Rural Macro 0.25 5.42 4 1.45 2 1.38

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Overview of LTE-Advanced Technologies

Outlining of candidate technologies for LTE-Advanced

LTE enhancement areas for LTE-Advanced

Emerging technology areas for LTE-Advanced

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LTE-Advanced

Outline of Candidate Technologies for LTE-A

Emerging technologies for LTE-Advanced Multi -hop transmission (relay) Multi -cell cooperation (CoMP: Cooperative Multipoint Tx/Rx)

Heterogeneous cell overlay

Self-organizing network

Enhancements from LTE Rel-8/9 Bandwidth/spectrum aggregation

Contiguous and non-contiguous Control channel design for UL/DL

MIMO enhancement Extended utilization of antennas (increasing the number of layers) UL SU-MIMO Enhanced UL/DL MU-MIMO

Hybrid multiple access scheme for UL Clustered SC-FDMA in addition to SC-FDMA

DL/UL Inter-cell Interference Management

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LTE-Advanced

LTE Enhancement Areas for LTE-AdvancedSpectrum Aggregation Advanced MIMO

High-order MIMO

EnhancedDL/UL MU-MIMO

UL SU-MIMO

FFR & Power Control

A

A

A

Frequency

Power Spectral Density

B

B

C

C

D

D

D

Reuse 1 Reuse 1/3

B C

Sector 1

Sector 2

Sector 3

UL Hybrid Multiple Access

Cluster

IFFTP/S

Modulation

symbols

Time Domain

signalS/PDFT

:mapping to a RB

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LTE-Advanced

Emerging Technologies for LTE-AdvacedMultihop Transmission (Relay) Multi-cell Cooperation (Collaborative MIMO)

Self Organizing Network (SON) Heterogeneous Cell Overlay

Pico eNB

Femto eNB

Relay eNB

Macro eNB

X2

Interne

t

Mobile

Core

Network

Femto-cellController

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LTE-Advanced

LTE-Advanced Improvements

A schematic view on LTE-Advanced improvements

LTE-Advanced

LTE

Higher OrderMIMO

SpectrumAggregation

CoMP

CoMP

Coverage Extension

HeNB/Relay

eNodeB

Data rate

SON

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LTE-Advanced 36

Spectrum and Carrier Aggregation

Motivation

Higher data rate support in wider bandwidth LTE-Advanced should extend up to 100MHz

Backward compatible co-existence with LTE and LTE-A in IMT carrier bands Aggregation of muliple component carriers into overall wider bandwidth Each component carrier can appear as LTE carrier to LTE UE

Two types of aggregation

Contiguos carrier aggregaion in a same frequency band Maybe difficult to find out frequency bands where maximum of 200MHz (FDD) can be allocated in

contiguos manner

Non-contiguous carrier aggregation in different frequency band Possibility for wider total bandwidth without correspondingly wider contiguous spectum

Feasibility, complexity and cost analysis should be done in RAN4 WG

Case 1: Contiguous BW aggregation Aggregated allocation of contiguous

carrier BWs Need of further clarification for

feasibility of contiguous BW allocationup to 100MHz

Case 2: Non-contiguous BW aggregation Aggregated allocation of separated carrier

BWs Need of further clarification for spectrum

range of BW aggregation

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LTE-Advanced

MIMO Enhancement for LTE-Advanced

DL MIMO enhancements

Design issues 8 Tx antennas

RS structure to support 8 Tx antennas DM RS

CSI RS

#of codewords

Codebook design Txdiversity in case of 8 Tx antennas

MU-MIMO enhancement scheme

UL MIMO enhancements

Design issues UL SU-MIMO transmiss ion

Up to 4Tx antenna Reference signal design

Number of codewords

Tx diversity

UL MU-MIMO enhancement

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LTE-Advanced

Uplink Multiple Access

Motivation

Problems of SC-FDMA PAPR/CM gain is not so crucial for

UE without power limitation problem Restricted flexibility due to single-

carrier property in scheduling andcontrol channel design

However, low PAPR/CM of SC-FDMA at power-limited situation is

still very important Uplink Hybrid Multiple Access of

Clustered SC-FDMA and SC-FDMA Clustered SC-FDMA transmission

for more flexible scheduling Non-contiguous resource allocation

should also be supported forPUSCH transmission from UE withsufficient amount of powerheadroom both in absence andpresence of spatial multiplexing

SC-FDMA transmission forpower-limi ted UEs Support of low PAPR/CM property

IFFT

P/S

Time-domain

signal

: mapping to a RB

IFFTP/S

IFFT

P/S

S/PRE

mapping

S/PRE

mapping

Time-domainsignal

Time-domain

signal

Modulation

Symbolsfor TrBlk B

ModulationSymbols

for TrBlk C

DFT

S/P

REmapping

DFT

DFT

Modulation

Symbolsfor TrBlk A

Clustered-DFTsOFDM

Clustered-

DFTsOFDM

Clustered-DFTsOFDM

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LTE-Advanced

Relay [1]

Several types of data transmission between eNB and

UEUE Relaying

Direct inter-UE connectivity

Autonomous ad-hoc network configuration

and management

Support of emergency call status

Relay Node Tx/Rx

Remote relay node Tx/Rx

Coverage extension and throughput

enhancement

Conventional UE-eNB Tx/Rx

Conventional single-hop Tx/Rx between UE

and eNB as a basic connection scheme

Wireless link

connectioneNB

Relay

Node

Relay

Node

Out of focus in LTE-Advanced study

Main focus in LTE-Advanced study

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LTE Ad d

Relay [2]

Exemplary use case for relay