Session3 Yoon-wibro Service

Introduction to

WiBro Technology September 10, 2004 Soon Young Yoon

T elecom R&D Center Samsung Electronics Co, Ltd.

Contents Background of WiBro Service WiBro Technology Overview Future Plan and Strategy

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Background of WiBro Service

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Market Trend in Korea (1) q Korea Telecommunication Market Trend u 2001-2003 subscriber growth rate Ø Fixed BB(44%) > Mobile internet(30%) > Mobile phone(16%) > Fixed phone(2%)

u Voice market is saturated (fixed phone) or slowly growing (mobile phone) u Data market (mobile internet & fixed BB) is growing faster than voice

Subscribers Trend Subscribers [Million]

40 35 30

Mobile Phone Mobile Internet

Fixed Phone Fixed Broadband

25 20 15 10 5 0 1997

1998

1999

2000

2001

2002

2003

? Number of mobile phone users includes mobile internet users

Source : KISDI (Korea Information Strategy Development Institute) Institute ) © SAMSUNG Electronics Co., Ltd.

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Market Trend in Korea (2) q Mobile Data ARPU (2003 Dec. SKT user basis) u As network evolves, data ARPU potion increases u Data rate is one of the key factor to increase data ARPU u Data ARPU is expected to keep increasing as the market churns

ARPU by Handset Type $60.00

$56.74

$1 = 1,150 won

$50.00

$47.19

ARPU

$40.00

Total ARPU Data ARPU

User Potion 9% 10%

21%

60%

$33.68

$30.00 $19.50

$21.54

$20.00 $10.00 $0.00

$12.64 34% 27% 1x EV-DO (MMS support)

1x EV-DO

$4.52 13% 1x RTT

$1.21 6% 95A/B

1x EV-DO (MMS support) 1x EV-DO 1x RTT 95A/B

*Total ARPU is net of interconnection fees and signup fees *Data ARPU = Wireless Internet revenues including phone mail revenue / internet user ARPU : Average Revenue Per User

MMS : Multi Media Service

© SAMSUNG Electronics Co., Ltd.

Source : SKT IR Data, 2004

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Needs for WiBro Service Limit of Existing Technologies q WLAN (IEEE 802.11 series) u Support very high data rate but limited coverage and mobility not supported

q Cellular (cdma2000 1X, 1xEV1xEV- DO, WCDMA) u Support large coverage and fast mobility but data rate is low and too expensive

Technology Comparison Coverage

QoS

Data Rate

WiBro WLAN Cellular

Mobility © SAMSUNG Electronics Co., Ltd.

Service Charge 5/25

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Service Position in Network Evolution q WiBro is now located between WLAN and Cellular service. q In the future, WiBro service will evolve to 4G Network which provide higher data rate and mobility Mobility 1996 199 6

2000

2005

2010

High

Medium

2G

3G

Cellular PCS

CDMA WCDMA

Pedestrian

Stationary

WiBro 2.4GHz WLAN

Cordless Phone Voice

4G Services

Text

Image Graphic

Video

© SAMSUNG Electronics Co., Ltd.

5GHz WLAN

High Quality Multimedia Video Streaming

Data Rate

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HPi(High Speed Portable Internet) Project q ETRI/Samsung HPi Project Objective u Development of HPi system at 2.3GHz u HPi RTT specification & system development

q Period: 2003.1. ~ 2005.12. q Sponsors : HTI, KT, KTF, SKT, Samsung q Results u ETRI/Samsung Ø WiBro spec proposed to TTA and accepted as baseline

u ETRI Ø Prototype system development

u Wired and wireless operators Ø Requirements definition RTT:: Radio Transmission Technology RTT © SAMSUNG Electronics Co., Ltd.

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WiBro Spectrum Allocation of Korea q MIC allocated 2.3GHz spectrum for WiBro services (Official MIC notice, Dec. 2002) u Frequency BW

: 2.3~2.4GHz

u Purpose

: WiBro (Portable Internet)

u Usage

: Fixed / Mobile

Spectrum Allocation Status

IMT-2000 IMTMSS FDD (30) (60)

1.885 1.92

IMT--2000 TDD IMT (15)

IMT--2000 TDD IMT (35)

IMT-2000 IMT-2000 IMTMSS FDD (30) (60)

1.98 2.01 2.025 2.11

2.17 2.2

WiBro

WLAN

WiBro (100MHz)

WLAN (83.5)

2.3

2.4

2.4835 [Unit : GHz]

MIC : Ministry of Information and Communication

MSS : Mobile Satellite Service

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Global TDD Spectrum Allocation q Global TDD Spectrum Allocation Status u FDD band is about 3 times larger than TDD band u More TDD band will be required Ø For high data rate support, new systems requiring broader bandwidth etc. [GHz]

1.6

1.7

1.8

WRC Europe U.S.A.

GSM 700Mhz

Future 3G

Australia/ New Zealand Japan China Korea

1.9

2.0

2.1

35 IMT -200015

IMT -2000

20 IMT -200015

IMT -2000

2.2

2.3

PCS IMT -2000

IMT -2000

PHS IMT -2000

IMT -2000

MMDS

2.4

2.5

2.6

ISM

IMT extension reserved for TDD

3.4Ghz

ISM

ITFS, BRS

3.4Ghz

ISM

IMT extension reserved for TDD

3.4Ghz

ISM

IMT extension reserved for TDD

GSM 40 IMT -200015

IMT -2000

TDD

ISM

IMT extension reserved for TDD

35 IMT -200015

IMT -2000

WiBro

ISM

IMT extension reserved for TDD

CDMA

3GPP TDD

WRC : World Radiocommunication Conference © SAMSUNG BRS : Broadband Electronics Co., Radio Ltd. Service

IMT extension reserved for TDD

>2.7

Other TDD Bands

ITFS : Instructional Instructional Television Fixed Service MMDS : Multichannel Multipoint Distribution System

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WiBro Technology Overview

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System Requirements High Data Rate

Mobility

q Maximize sector/user throughput

q Vehicular speed mobility (~60km/h)

q Broad bandwidth

q Seamless service

q MAC & RRC

q Longer battery usage

Full Coverage

Low Cost

q Various types of cell (Macro / Micro / Pico)

q Improve spectral efficiency q Reduce infra cost

q Easy cell planning q Roaming with cellular & WLAN MAC : Medium Access Control © SAMSUNG Electronics Co., Ltd.

q Multiplexing gain of packet data.

RRC : Radio Resource Control 11/25

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TDD vs. FDD FDD GB

GB

DL

GT

UL

Freq.

Freq.

TDD GT

DL GB

UL GB

GB

Time

Time TDD

FDD

UL/DL Isolation

Guard Time

Guard Band

Spectrum Efficiency

More efficient (Smaller GB)

Less efficient (Larger GB)

UL/DL Channel

Reciprocal (Easy to apply SA, MIMO etc.)

Non--reciprocal Non

Suitable for

Packet base data traffic

Symmetric traffic like voice

For same coverage Applied system

Need more power (duty factor) WiBro, 802.16, 802.11a/b, TD--SCDMA, TD

GB : Guard Band

Need smaller power IS-95A/B, CDMA2000, 1xEVIS1xEV-DO, GSM, GPRS, WW-CDMA

GT : Guard Time

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PHY Spec. q Frequency Band

: 2.3GHz (Korea)

q Channel Bandwidth

: = 9MHz

q Duplex

: TDD / 5msec frame

q Multiple Access

: OFDMA

q Modulation

: QPSK, 16QAM, 64QAM

q Channel Coding

: CTC

q Cell Coverage

: ~1km

q Maximum Data Rate u Sector throughput

: DL : 18 Mbps, UL : 6 Mbps

u User throughput

: DL : 3 Mbps, UL :1 Mbps

q Optional AAS support CTC : Convolution Turbo Code © SAMSUNG Electronics Co., Ltd.

AAS : Adaptive Antenna System 13/25

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MAC Spec. q Flexible BW Allocation by MAP u Frame by Frame

q Supports flexible QoS offering u rtPS, nrtPS, BE

u Fine granularity

q Efficient MAC PDU construction u Variable size MAC PDU u MAC-level framing (No PPP) u Fragmentation, packing, concatenation

q q q q

Payload header suppression support Security support Sleep mode support H- ARQ/ARQ support

q Handoff : BBM q AMC support rtPS : realreal- time Polling Service BE : Best Effort H- ARQ : Hybrid Automatic Response ReQuest AMC : Adaptive Modulation and Coding

nrtPS : nonnon- real real-- time Polling Service PDU : Protocol Data Unit BBM : Break Before Make

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PHY Characteristics (1) q High Spectral Efficiency Support u TDD Ø Minimize guard band to increase spectral efficiency

u 10 MHz BW / OFDMA Ø Minimize multi-path interference to increase spectral efficiency

u Support various modulation schemes (QPSK, 16QAM, 64QAM) and CTC to maximize data rate

q Full Coverage Support u Support cellular operation with frequency reuse factor of 1 Ø High spectral efficiency & easy cell planning Ø Minimize interference using diversity subchannel based on Reed Solomon sequence Ø Compensate low SINR at cell edge using low rate coding

u Fast handover with mobile IP

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PHY Characteristics (2) q Performance Enhancement considering Mobility(1) u H-ARQ Ø Increase the efficiency of re-transmission resulting from fading and interference

u Band selection AMC & diversity subchannel Ø Mobile stations request to select band selection AMC or diversity subchannel by monitoring channel status Ø For slowly moving users : allocate band selection AMC subchannels which have high quality channel response to increase transmission efficiency and coverage Ø For fast moving users : allocate diversity subchannels distributed over whole frequency band to maximize frequency diversity

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PHY Characteristics (3) q Performance Enhancement considering Mobility(2) u Support 60km/h mobility Ø Minimize distortion due to mobility using short OFDM symbol Ø Apply pilot structure supporting channel estimation while moving

u Support fast access during hand-off Ø Apply short frame length (5msec) for fast response Ø Apply additional non-contention based control channel access duration

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PHY Characteristics (4) q Flexible Resource Allocation for Multiple Users u Asymmetric DL / UL allocation Ø DL/UL : 2:1, 1:1, 5:1

u Multiple user acceptance Ø Support different packet scheduling algorithm and status management for each type of mobiles

q Support Portability u Support sleep mode to decrease handset consuming power

q TDD Adaptive Antenna System (Optional) u Increase coverage and data rate for slowly moving users

PDU : Protocol Data Unit

PPP : Point to Point Protocol

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MAC Characteristics q Scheduler Design Consideration u Adaptive modulation & coding

u QoS guarantee

u Throughput maximization

u Fairness

u Power constraint of mobiles

u Scheduling algorithm complexity

q QoS Classes in WiBro QoS Class

Data type • Periodic interval

Real time polling • Variable-sized packet service • Real time data stream

Non real time polling service

Application MPEG Video, Video telephony

• Variable-sized packet • Delay-tolerant data stream

FTP, WWW

• Minimum data rate is required

Best effort service © SAMSUNG Electronics Co., Ltd.

• No minimum service level

FTP, WWW, E- mail 19/25

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WiBro Network Architecture Acronyms AAA Authentication, Authorization and Accounting ACR Access Control Router AR Access Router BR Border Router GSN GPRS Support Node HA Home Agent IMS IP Multimedia Sub-system PDSN Packet Data Serving Node RAS Radio Access Station

PSTN/PLMN

IMS Internet MIP HA

BR

AAA

CN

GSN/PDSN

Internet

ACR AR

802.11x WLAN

RNC/BSC NodeB/BTS

AP

3G RAN AP

RAS RAS

Hot Spot

WiBro

3G MS

Macro-cell

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Network Element Functions RAS

ACR q Packet classification & header suppression

q PHY processing and air resource scheduling

q Service flow management q Traffic switching & integration point

q MAC management message processing q MAC PDU processing

q Handover management

q CID management

q Session information maintenance

q Encryption & Decryption

q RAS interface

q ACR interface

q Core network interface

PDU : Protocol Data Unit © SAMSUNG Electronics Co., Ltd.

CID : Connection ID 21/25

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Future Plan and Strategy

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WiBro Policy of Korea q Standard u Based on IEEE 802.16-2004 & 802.16e Draft3 or later version satisfying: Ø Downlink 512kbps, uplink 128kbps at 60Km/h Ø Channel badwidth >9MHz Ø Roaming between operator equipment Ø TDD Ø Frequency reuse factor 1

q Service Provider Selection u Number of service provider : 2~3 u Frequency usage period : 7 years u MVNO, NO-SP separation considered

Time Schedule 2004. 9 Complete service provider selection policy

MVNO : Mobile Virtual Network Operator © SAMSUNG Electronics Co., Ltd.

2005. 2

Service provider selection

NO : Network Operator

2006 Commercial service

SP : Service Provider

Source : MIC 23/25

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WiBro Mobile Station Development Strategy q Survey Result of WiBro Demand Public Users Most important benefit Preferred Service charge policy Preferred type of mobile station Needs for service continuity with existing ones

q Cheap service charge and phone

Enterprise Users q Mobility

q Fixed amount q Handheld type ? Early adopters prefer notebook type

q Notebook type q PDA

q 78%

q 95%

Source : KISDI, 2003

q WiBro Mobile Development Strategy u Develop low price mobile phones for public users u Develop high mobility support mobile phones for enterprise users u Support existing services (Develop dual mode type) u Develop notebook internal type or card type in early market u Move to PDA or handheld type as market matures © SAMSUNG Electronics Co., Ltd.

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WiBro System Development Strategy q Time Time--to to--market Development of Standardized System u Proof of Concept development through HPi project

q Capacity Enhancement Technology Adoption u MIMO / AAS / Space time coding adoption u Increase the throughput of slowly moving users using UL/DL reciprocal channel characteristics of TDD system u Key technology development and TTA phase 2/IEEE802.16e standardization

q Alternative Low Price Solution Development for Enterprise or Household Users u Standardize the configuration applying low power amplifier or looser RF spec to reduce network deployment cost © SAMSUNG Electronics Co., Ltd.

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Appendix. Technology Comparison WiBro

3G Standard TD-- CDMA TD

HSDPA

Peak Data Rate

DL : 18.4Mbps UL : 6.1Mbps

DL : 3.1Mbps UL : 900Kbps

Bandwidth

= 9MHz

5MHz(10MHz)

Multiple Access

OFDMA

TDMA, CDMA TDMA, CDMA

Duplex

TDD

TDD

Mobility

Mid

Coverage

Mid

Standardization TTA & 802.16e Public/ Enterprise

Target Market

CSMA : Carrier Sense Multiple Access

EV--DO EV

DL : 14Mbps DL :3.1Mbps UL : 2Mbps UL :1.2Mbps 5MHz

WLAN 802.11b : 11Mbps 802.11a,g : 54Mbps

1.25MHz

20MHz

CDMA

CSMA/CA

FDD

FDD

TDD

High

High

High

Low

Mid

Large

Large

Small

3GPP

3GPP

3GPP2

Public

Public

Public

IEEE 802.11x Home/ Enterprise

CA : Collision Avoidance

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Q&A Telecom R&D Center SAMSUNG ELECTRONICS Co, Ltd. [email protected]

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