1. Contents Ⅰ Overview of WiBro Service Ⅱ WiBro Standardization Ⅲ
WiBro Technology IV
WiBro Business Plan in KT

2. I. Overview of WiBro Service (1/8)
Definition
“WiBro service means high speed wireless internet service which is available anytime, anywhere using portable terminal in stationary or even in mobile environment.”
 WiBro: Wireless Broadband
“Stationary or
Mobile Environment”
“Any time,
Any where”
“High Data Rate”
“Low Tariff”
■ Seamless Service
even in outdoor such as street, park and etc.
■ +1 Mbps User Data Rate (Day 1)
■ Higher Data Rate
(Future)
■ Nomadic
■ Vehicular Mobility
■ Low CAPEX
■ Roaming with
WLAN and CDMA
Handset terminal
for Notebook
PCMCIA card for Notebook and PDA
Handset
PDA
Handheld PC
Notebook PC

3. ♪ I. Overview of WiBro Service (2/8) Seamless, Ubiquitous Experience
Service Concept
Mobile
Automobile Service
Office SD
MMC
SIM SD
MMC
Seamless,
Ubiquitous
Experience
Infra
Info
IC Card
Personal Info
Home
Shop
Ｅ-Tower ♪
Game
DVC
STB TV
Map Info PC
Digital
Contents SD
MMC
Audio
DVD
Telephone
Outdoor
F - 7

4. High speed DSL(ADSL,VDSL ..)
I. Overview of WiBro Service (3/8)
Service Positioning
Mobility
Tariff Competitiveness
Service beyond the bounds of WLAN, CDMA 1x(EV-DO), IMT2000
High 3G
(IMT-2000)
Data Rate
Mobility 2G
(IS-95,
Cellular)
WiBro
Nomadic
Portability
Cordless
WiBro
Cordless phone
WLAN
DATA
Rate
IMT-2000
Fixed
Wired Phone
High speed DSL(ADSL,VDSL ..)
Service Comparison
Item
WiBro
High Speed DSL
WLAN
Mobile Com.
Service Area
Outdoor/Indoor
Indoor
Indoor(Hotspot)
Data Rate
High speed
Ultra high speed
Very high speed
Med/Low speed
Mobility
High No
Low
Very high
Contents
Wired/Wireless Contents
Wired Contents
Wireless Contents
Tariff
Relatively Low
Terminal
Smart phone, PDA, Notebook etc.
Desktop, Notebook
PDA, Notebook
Cellular phone, PDA

5. Requirement of WiBro Service
I. Overview of WiBro Service (4/8)
Service Class
■ Interactive Service: Best-efforts
Web Browsing, Interactive Game, etc.
■ Streaming service (rtPS: Real Time Poling Service)
VoD, MPEG, etc.
■ Back Ground service (nrtPS: Non Real Time Poling Service)
FTP, , SMS, multicast/broadcast, MMS, Push etc.
■ Real Time Service (UGS: Unsolicited Grant Service)
VoIP
Requirement of WiBro Service
■ Provide the way to use high speed internet service not only in home but also in outdoor → Equivalent data rate to xDSL per user
■ Maximize the usage over the allocated spectrum
■ Maximize the spectral efficiency
■ Extend the service coverage
■ Reduce the cost per bit
■ Low power consumption at AT
■ Faster handoff

6. I. Overview of WiBro Service (5/8)
Customer Needs
■ In Korea wireless internet service is mainly used for entertainment (58%), communication ( /café 17.6%) and business (9.3%).
■ CDMA 1X(EV-DO) shows poor service quality, insufficient contents despite high tariff system and WLAN has several shortcomings such as service coverage and QoS problems in spite of high speed data rate and low tariff system.
■ Customer needs of WiBro service is high speed data rate and low tariff system, which are the accelerating factor for widespread use of wireless internet.
Terminal  PDA, Notebook
Service  > game …
Service area  including mobile status
PDA
Notebook
Handheld PC
Smart phone
Handset
42.1%
School/office
59.5%
56.7%
36.3%
50.6%
Bus/Subway
30.2%
28.6%
Street
9.3%
8.7%
Indoor
Web
Browsing
3.5%
Game
Messenger
MMS
Business trip 7

7. Seamless, Ubiquitous Experience
I. Overview of WiBro Service (6/8)
Total Access (Sprint/Nextel)
Work
Domain
Home
Seamless,
Ubiquitous
Experience
Elsewhere
Portable Remote Access Services
Field Service Apps
Campus W- PBX Services
Portable Services in
Public Hot-Spots
Mobile B-to-C
M-Commerce Services
Mobile Office (Voice and Data Apps)
High BW Connectivity
Video Streaming - Conferencing Apps
Portable
Office
F - 7

8. Technical Consideration (Sprint/Nextel)
I. Overview of WiBro Service (7/8)
Technical Consideration (Sprint/Nextel)
True Broadband Speeds
1 Mbps/user
NLOS Operation
up to 10 us delay spread
High Link Budget
> 160 dB
High # of Simultaneous Sessions
> 100 per carrier
High Spectral Efficiency
> 2 bps/Hz/sector
Large Channel Bandwidths
> 5 MHz
Low Latency
< 50msecs
Deep Indoor Penetration
90th percentile inside
IP QoS
class, service, protocol, application based differentiation, VoIP
Portability
seamless IP session handover
Mobility (Optional Parameters)
inter-cell handover up to 120 km/hr
IETF based L3+
standard IP based protocol support
Low Power Integrated CPE/PCMCIA
consumer device form factors

9. I. Overview of WiBro Service (8/8)
Operators Vision
■ End-to-End Wireless IP Data Services Design
■ Better than 1+ Mbps Performance User Experience
■ Mobility for Data with IP QoS support
Day 1 - Non real time
Future - Real time
■ Integrated wireless backhaul capability
■ True International Standard and Devices
Requires flexibility for bandwidth and band plans
Need to support both TDD and FDD based on spectrum allocations
■ Devices examples: Desktop modem, PCMCIA card, Handset, Compact Flash
Embedded into all broadband capable consumer devices
■ 10x+ competitive advantage to current 3G systems

10. Technical Committees (TC) Common Infrastructure
II. WiBro Standardization in (1/8)
TTA organization
Technical Assembly
(TA)
Coordination
Committee (CC)
Strategic Planning
Committee (SPC)
Technical Committees (TC)
Project Groups
(PG)
Common Infrastructure
(TC1)
Information Security, Internet Security, Biometrics,
Welfare Communication, IC Card, SoC,
Disaster Recovery, Embedded S/W
Transmission
(TC2)
Optical Transmission, Optical Internet, Signaling,
Routing Protocol, Quality of Service, VoIP, ENUM,
NGN, Active Internet, Charging & Interconnection,
Network Management, IPv6, LAN, DSL, Digital Home
Radio Communication
(TC3)
Digital TV, DMB, Digital Cable, WPAN, Wireless LAN, Propagation Measurement, NGMC, LBS,
Telematics, Portable Internet (WiBro)
IT Application
(TC4)
WEB, Multimedia Application, Workflow, E-commerce, Public information, MetaData, S/W process,
S/W Components. NGIS, ITS, Grid

11. WiBro standardization status
II. WiBro Standardization (2/8)
WiBro standardization status
TTA has begun WiBro Standardization since June 2003.
Establishment of 2 Working Groups and 2 Ad Hoc
WiBro Standardization Activities & Timeline is as follows.
Phase I Standardization for WiBro was finished.
3Q 2003
Definition of Service/System Requirements
4Q 2003
Preparation of the Draft Standard
Definition of major system parameters
Definition of items/criteria/conditions for Evaluation
Collection and Evaluation of Baseline Proposals
Selection of Baseline Proposal(s)
1Q 2004
Completion of Draft Standard
2Q 2004
Approval and Notification of Standard
Phase II Standardization for advanced WiBro is in progress.
3Q 2004
~2Q 2005
Harmonization with IEEE e
Approval and Notification of New Standard including performance enhanced technologies such as MIMO, smart antenna etc.

12. Frequency Reuse Factor [bps/Hz/cell(sector)]
II. WiBro Standardization (3/8)
Major Decision
TTA approved the Major System Parameters & Radio Access Requirements. (Jan )
Major System
Parameters
Radio Access Requirement
TDD
Frequency Reuse Factor
Duplexing 1
OFDMA
Multiple
Access
10 [MHz]
Channel BW
Mobility
≤ 60 [Km/h]
Service Coverage
≤ 1 [Km]
Spectral Efficiency
[bps/Hz/cell(sector)]
Max. DL / UL = 6 / 2
Aver. DL / UL = 2 / 1
Handoff
≤ 150 [ms]
Throughput
(per user)
Max. DL / UL = 3 / 1 [Mbps]
Min. DL / UL = 512 / 128 [Kbps]

13. WiBro Network Architecture
II. WiBro Standardization (4/8)
WiBro Network Architecture
■ PSS (Portable Subscriber Station)
- Wireless access
- IP mobility, Terminal/User authentication
- Multicast service, Other network interworking
■ RAS (Radio Access Station)
- Wireless Access
- Radio resource management/Control
- Handoff support
- QoS support, Downlink Multicast
■ ACR (Access Control Router)
- IP routing and Mobility management
- Authentication/Security
- QoS, IP Multicast, Billing support
- Handoff control between RASs
■ Core Network
- Authentication, Billing
- IP Mobility support
- Other network interworking
Public IP Network
IP Network of Operator HA
AAA
ACR
RAS
PSS

14. Standardization of major technology
II. WiBro Standardization (5/8)
Standardization of major technology
IEEE
Mobile BWA
flash-OFDM
iBurst
HSDPA
MWA
W-CDMA
3GPP
IEEE e
Mobile
IS-95B
cdma2000 1x EV-DV
Mobile Wireless MAN
cdma2000 1x
3GPP-2
cdma2000 1x EV-DO
IEEE : Bluetooth
IEEE a: UWB
IEEE HR
IEEE LR
Wireless PAN
IEEE a; HIPERLAN/2
NWA
Nomadic
IEEE
IEEE b
Wireless LAN
IEEE g
FWA
IEEE
Wireless MAN
Fixed
IEEE a/HIPERMAN
10k
100k 1M
10M
100M 1G
* Not drawn to an exact scale

15. II. WiBro Standardization (6/8)
IEEE Evolution
(10-66GHz) a
(2-11GHz) d
Revised
Amendment e
(mobility)
MAC
PHY
MAC +
new PHY
drop
MAC ++
new PHY +
Fixed
Mobile

16. II. WiBro Standardization (7/8)
IEEE d & e
■ IEEE d ■ IEEE e Network Model
- Revision to , a,
802.16c
- Licensed bands, 2~11GHz
- Non line of sight (Practical)
- Lower component cost
• Good for residential and
small-business
- 30Mbps in 10MHz BW
■ IEEE e
- Amendment to a/c/d
- Licensed bands, 2~6GHz
- Non line of sight
- Support vehicular mobility
- Main concern on handoff and
sleeping mode

17. Korea decided IEEE 802.16e as WiBro Standard Baseline.
II. WiBro Standardization (8/8)
Roadmap of WiBro standardization
TTA
Korea decided IEEE e as WiBro Standard Baseline.
(Jul. 2004)
Phase I
Phase I
Rev.
Phase II
2004.6
2004.4Q ~ Q
OFDMA/TDD
1024 FFT, BW: 10MHz
PHY Harmonization
MAC Harmonization
Enhanced PHY/MAC
AAS, MIMO, LDPC, H-ARQ
802.16d/e
802.16d/e
IOT Profile
- Profile statement
(2005.1Q)
- Spec Work
(2005.2Q)
- Completion of Spec
(2005.3Q)
TTA
TTA
IEEE
802.16e
Issue
802.16e/D5
Issue
802.16e/D6
Issue
802.16e/D7
Publish
2004.9
2005.2
2005.4
2005.3Q (?)

18. WiBro standard baseline and spectrum allocation
III. WiBro Technology (1/4)
WiBro standard baseline and spectrum allocation
■ WiBro system should satisfy IEEE , IEEE e D3 above standard and 5 performance criteria
Min data rate under 60km/h condition in cell edge: 512kbps (DL), 128kbps (UL)
Bandwidth: above 9MHz
Roaming between WiBro operators
Frequency reuse factor: 1
Duplex: TDD including Tx/Rx time slot synchronization between WiBro operators
■ Spectrum allocation for WiBro service
2300MHz
2327
2331.5
2358.5
2363
2390
2400MHz
CH1
CH2
CH3
1st Band
2nd Band
3rd Band GB
WLAN
4.5MHz
10MHz

19. III. WiBro Technology (2/4)
Key Features
■ RF Frequency: 2.3GHz
■ Multiple Access/Duplexing: OFDMA/TDD
■ Frame length: 5 msec
■ Bandwidth: scalable from 1.25MHz to 20MHz
■ Flexible subchannelization for band selection and diversity
■ Fast AMC (Adaptive Modulation and Coding) subchannel based on uplink CQI (Channel Quality Indicator)
■ Full diversity subchannel by multiple symbol grouping
■ Cell differentiation with different PN sequences
■ Pilot tone based downlink and uplink
■ Separate ranging channel time slot
■ More efficient channel code: convolutional (or block) turbo code
■ H-ARQ in the downlink and uplink
■ Modulation level: QPSK, 16QAM, 64QAM
■ Optional AAS (Adaptive Antenna System) support

20. III. WiBro Technology (3/4)
System Parameters
Parameter
Value
Channel spacing
9 MHz
Effective bandwidth
8.75 MHz
Number of used tones
864 out of 1,024
Number of data tones
768
Number of pilot tones 96
Tone spacing
kHz
Ratio of cyclic prefix time to basic OFDM symbol time
1/8
Basic OFDMA symbol time
102.4 μs
Cyclic prefix time
12.8 μs
OFDMA symbol time
115.2 μs
TDD frame length
5 ms
Number of symbols in a frame 42
TTG+RTG
161.6 μs

21. Average DL Data Throughput/sector Average DL Data Throughput/cell site
III. WiBro Technology (4/4)
System Capacity
System Capacity
Item
Value
Note
Bandwidth
Channel
9MHz
Effective BW = 8.75MHz
Total
27MHz
3 Channels
Peak DL Data Rate
20Mbps
Without AAS, MIMO
Average DL Data Throughput/sector
6Mbps
Multi-cell environments
without AAS, MIMO
Average DL Data Throughput/cell site
54Mbps ( = 6Mbps x 9)
Macro cell site: 3FA/3Sector
Cell Radius
Macro Cell : 1Km
Micro Cell : 400m
Pico Cell : 100m
4 / 15

22. Subsystems & Service management system
IV. WiBro Business Plan in KT (1/4)
Logis
WiBro Network
UsN
FPGA
Macro-RAS
micro-RAS
Contents Partner
Service Center
Information Center
Public Offices
Portable
Entertainment
PCMCIA
Tablet
ACR
Voice
Internet
Handheld
Enterprise CF
SmartPhone
Command
Control
pico-RAS/ Repeater
Smart/MIMO-RAS
Home Network
Chipset
Subsystems & Service management system
Mobile Internet
Telematics
e-Shop
ITS
Bank
User terminal
Network
Service/Contents

23. IV. WiBro Business Plan in KT (2/4)
Deployment Policy
■ Deployment by stages within three years
■ CAPEX reduction using currently operated wired/wireless infra (Backbone/Access network)
■ Minimization of shaded zone using repeater, WLAN/CDMA interworking
Daejon
Seoul
Inchon
Gwangju
Ulsan
Busan
Daegu
2 Stage
3 Stage
1 Stage
Deployment Plan
Interworking Concept
Hot Zone
2G/3G
WiBro
Hot Spot AP AP AP AP
Park
Airport

24. IV. WiBro Business Plan in KT (3/4)
Terminal Policy
■ Various terminal (Card, Chip embedded Notebook, PDA, HPC, Smart phone etc.)
■ WiBro exclusive terminal (Easy access and User friendly interface)
■ Specific WiBro terminal interworking with existing services (WLAN, CDMA, DMB)
Terminal Type
Roadmap
Phase 1
Phase 2
Phase 3
WiBro exclusive
Terminal
- Card
- Embedded
Multimode Terminal
Card, Embedded type
WiBro+CDMA+GPS etc.
Specific Terminal
- Person/Enterprise
- Intelligence converged
- Service specific
One Chip
Notebook
WiBro exclusive
Portable Terminal
DBDM Terminal
(WiBro+ CDMA)
DBDM Terminal
WiBro+ WLAN
WIBro+ DMB
WiBro+ GPS
TBTM Terminal WiBro + WLAN + CDMA
WiBro+ CDMA+ DMB
PDA
Smart Phone

25. WiBro Killer Application Existing Internet Service
IV. WiBro Business Plan in KT (4/4)
Service Strategy
WiBro Killer Application
Existing Internet Service
■ Development of killer application with multimedia/convergence type
Main WiBro BMs are MMS, LBS, Game, Push service, IP Multicasting.
■ WiBro service interworking with existing services
Wired
Web Browsing, Information
Movie VOD: Entertainment
e-Stock, e-Banking, e-Learning etc.
Evolution and
Development
service
Main
MMS (Multimedia Messaging Service)
Hi-Quality Video Mail/Messaging
Push Service
Group video chatting, Ad & Coupon
Game: IP based network game
LBS (Location Based Service)
IP Multicasting Service
High-Quality VOD, Real Time Broadcasting, Movie
Multimedia
Convergence
Wired/Wireless
Wireless
SMS
VOD, Game: Entertainment
e-Banking: m-Commerce
Interworking service
Nespot (WLAN) interworking service
CDMA interworking service
DMB interworking service
Megapass (xDSL) interworking service