1

Sungjin Kim, Junghoon Suh, Joon-il Choi, Daegyun Kim, Donghee Kim Samsung Electronics+82-31-280-9638joon.il.choi@samsung.com

ABSTRACT: This contribution introduces our view on the Trend which will evolve from single user capacity improvement with link enhancement to system capacity enlargement by interference cancellation.

TITLE: Core Technology for UMB Evolution

TSG-C

RECOMMENDATION: FYI

Samsung Electronics grants a free, irrevocable license to 3GPP2 and its Organizational Partners to incorporate text or other copyrightable material contained in the contribution and any modifications thereof in the creation of 3GPP2 publications; to copyright and sell in Organizational Partner's name any Organizational Partner's standards publication even though it may include all or portions of this contribution; and at the Organizational Partner's sole discretion to permit others to reproduce in whole or in part such contribution or the resulting Organizational Partner's standards publication. Samsung Electronics is also willing to grant licenses under such contributor copyrights to third parties on reasonable, non-discriminatory terms and conditions for purpose of practicing an Organizational Partner’s standard which incorporates this contribution.This document has been prepared by Samsung Electronics to assist the development of specifications by 3GPP2. It is proposed to the Committee as a basis for discussion and is not to be construed as a binding proposal on Samsung Electronics . Samsung Electronics specifically reserves the right to amend or modify the material contained herein and to any intellectual property of Samsung Electronics other than provided in the copyright statement above.

DATE: Dec. 03, 2007

SOURCE:

C00-20071203-019

2

BeyondUMB Ev.

(3D Video)

BeyondUMB Ev.

(3D Video)

UMB Ev.IMT-Adv(MPEG)

UMB Ev.IMT-Adv(MPEG)

UMB(WEB)UMB(WEB)

1xEvDo(VoIP)

1xEvDo(VoIP)

Prediction: Capacity Trend of Next G. Wireless Comm.Prediction: Capacity Trend of Next G. Wireless Comm.

AMCx5OFDM x5AMC x10

10M10M 100M100M10G10G

MIMO, OFDMAMC

New MIMO x10

Trend will evolve from single capacity increase with link enhancement

to system capacity enlargement by interference cancellation.

Trend will evolve from single capacity increase with link enhancement

to system capacity enlargement by interference cancellation.

MIMO x4OFDM x25AMC x10

1G1G

3

Innovations for Wireless Communication ResearchInnovations for Wireless Communication Research

Research

Contents

Research

Contents

Next GenerationWireless Communications

Next GenerationWireless Communications

Research

Method

Research

Method

Research

Direction

Research

Direction

Continuity with previous research directions?

Enhancement for single radio link etc

Continuity with previous research directions?

Enhancement for single radio link etc

Are current research methods suitable?

Common major, Common area, etc.

Are current research methods suitable?

Common major, Common area, etc.

What is the key technology leading to

innovation ?

MIMO, CR, Relay?

What is the key technology leading to

innovation ?

MIMO, CR, Relay?

ss

Which part of the innovation gives great

efficiency ?

4

Research approaches of other institutes Research approaches of other institutes

Research

Method

Research

Method

• Operator (Vodafone), Chip Vendor (Intel)

• UK Research Institute (Ofcom), Wireless operator (Nokia)

• Operator (Vodafone), Chip Vendor (Intel)

• UK Research Institute (Ofcom), Wireless operator (Nokia)

Research

Direction

Research

Direction

• Application (Alcatel, DoCoMo & Motorola)

• Wireless device (WWRF), Network (Consortium)

• Application (Alcatel, DoCoMo & Motorola)

• Wireless device (WWRF), Network (Consortium)

Research

Contents

Research

Contents

• Area : Canada CRC, North America CISCO

• Key Tech. : North American Universities, Europe Easy-C

• Area : Canada CRC, North America CISCO

• Key Tech. : North American Universities, Europe Easy-C

Current Status of Wireless Comm. ResearchCurrent Status of Wireless Comm. Research

5

• Social networking • Social networking

Comparison and analysis of research approaches for different companiesComparison and analysis of research approaches for different companies

Research DirectionResearch Direction

Research Method

Research Method

Research ContentsResearch Contents VisionVision

• Collective communications • Collective communications

• System-level research• System-level research • Small spatial interference• Small spatial interference

Summary of Current Status of Wireless Comm. ResearchSummary of Current Status of Wireless Comm. Research

6

Research Method(Development/Outsourcing)

Research Method(Development/Outsourcing)

Application/Wireless Device(Voice Device)

Application/Wireless Device(Voice Device)

Network(Cellular Convergence Network)

Network(Cellular Convergence Network)

Research Contents(Enhancement for single radio link)

Research Contents(Enhancement for single radio link)

Consulting/Crowd sourcingConsulting/Crowd sourcing

Unifying diverse wireless devices

Collective Comm.Unifying diverse wireless devices

Collective Comm.

United Network Including MeshUnited Network Including Mesh

System Performance Enhancement(high efficiency/low cost)

System Performance Enhancement(high efficiency/low cost)

Summary of Research for Next G.Summary of Research for Next G.

7

Collective CommunicationsCollective Communications

2G/3G (1km)2G/3G (1km)

WiMAX (100m)WiMAX (100m)

4G4GW-LAN (10m)W-LAN (10m)

Short range (1m)Short range (1m)

Single CommunicationSingle Communication

New Point to Point SchemeNew Point to Point Scheme

STANDARD

STANDARD

EvolutionEvolution

EvolutionEvolution

EvolutionEvolution

EvolutionEvolution

Collective CommunicationCollective Communication

Convergence and Enhancement of Previous Standards

Convergence and Enhancement of Previous Standards

Always in BetaAlways in Beta

2G/3G (1km)2G/3G (1km)

WiMAX (100m)WiMAX (100m)

W-LAN (10m)W-LAN (10m)

Short range (1m)Short range (1m)

CoordinationCoordination

8

Solution: Previous MIMO Work Extended spatial processing for wireless link research

Multi-Beam SteeringMulti-Beam Steering

Distr./Network MIMODistr./Network MIMO

On-Chip Antenna ArraysOn-Chip Antenna Arrays

New MIMONew MIMO

Required Core Tech.Required Core Tech.

9

New MIMO Schemes of Other Companies New MIMO Schemes of Other Companies

New MIMO Schemes Increase System Capacity Required to keep pace with proposed novel scheme and research for optimal joint searching

New MIMO Schemes Increase System Capacity Required to keep pace with proposed novel scheme and research for optimal joint searching

3: Good 2: Enough 1: Moderate

10

MIMO

Competitive Advantage Strategy Compared to Previous Approach - Key point is to establish B4G SDMA oriented preceding core patent earlier than other companies. B4G Network Adjustment High freq/Large Scale Beamforming B4G Network Utilization Cooperative/Distributed MIMO

1980 1990 2000

GSM WCDMAHSPA

LTEGPRS/EDGE

GSM/GPRS/EDGE WCDMA/HSPA

Standardization

Commercialization

3GPPMobile Comm

2007 2010

LTE+

BF

Intelligent Antenna Standardization Status

Antenna Selection 4 beam selection16 beam selection

# Ant

Diversity Multiplexing

2Tx 2Tx*2Rx 4Tx*2Rx

Smart antenna

Interf. Cancellation for

tens of beams

>8Tx*4Rx

3G 4GB4

G2G

Frequency Band

1GHz 2GHz 4~6GHz • ~10 GHz

• ~10 EA

• DP/WZ Coding

• 3D BF

• SDMAUn-deployable, Un-commecialized

STC DPC

Adaptive

Beyond-IMT

CooperativeMIMONetwork

Utilization

Non-cooperativeMIMO

1

2

Approach for InnovationsApproach for Innovations

1 2

Semi-cooperativeMIMO

More MIMO

More than MIMO

Impact of BeamformingImpact of Beamforming

• Theoretically, beamforming can increase the capacity up to #antennas - A solution to solve the limited bandwidth

Downlink channel

, 1, ,Hi i iy n i K h x

Fundamental Problems in BeamformingFundamental Problems in Beamforming

•Beamforming requires user information such as location - In rich scattering environments, more than x10 feedback is necessary

Jindal 2006: 5 by 5 MIMO broadcast channel

Ideal feedback

GapLimited feedback cases

Beamforming performanceis reduced

User cooperation for beamforming enhancementUser cooperation for beamforming enhancement

• User cooperation removes the remained spatial interferences Translated MISO to MIMO

,1 ,1

,2 ,2

1 2

, ,

( )

i i

i i

Hi K

i i

i K i K

y ny n

y n

y n

y h h h x

i i i y Hx A n

,1

,2

1 2

,

0 00 0

( ) , ,1

0 0

i

i

HK i i

i

i K

nn

n

n

H h h h A n

, 1, ,Hi i iy n i K h x

nyy1

1'

1,2

nyy1

3'

3,2

1y

2y

3y

4y nyy1

4'

4,2

ny 1amplifyforward

y1 의 noisy version

nniH

1

1 xh

1)1

1(2

1

1,21 nH xh

Technical SummaryTechnical Summary

Full CSIT

Imperfect CSITImperfect CSIT

Full CSIT

• Practical system has limited CSI there is gap b/w SU-MIMO and MU-MIMO

Robust to CSIT error

User Cooperation Compensate CSIT error

Sensitiveto CSIT error

gap