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1 SK Telecom s Technology Evolution 2 Analyst SK Telecom

2 SK Telecom DMB Beyond 3G Software Defined Radio

3 I. SK Telecom SK Telecom CDMA Cellular (n.top) CDMA2000 1X 3G (W-CDMA) (NATE) CDMA 1xEV-DO 18,000 15,000 12,000 9,000 6,000 3,000 - Rapid Subscriber Growth Subs (thousand) CDMA Launch 1,562 6yr CAGR : 31.8% 10,110 10, AMPS Termination 15,179 17,220 5,400 2,299 3, `96 `97 `98 `99 `00 `01 `02 CDMA AMPS STI Acquisition 17,956 ` % Strong Market Leadership [SKT s M/S in Korea cellular market] 50.6% 52.3% 53.3% LGT 14.3% KTF 31.5% 53.6% 53.8% 54.2% SKT 54.2% Jun-01 Aug-01 Dec-01 Jun-02 Jan-03 Jun-03 Aug-03

4 I. SK Telecom Data ARPU & % of Total Revenues* ARPU & MOU (Data ARPU in Won) (ARPU in Won) 3,290 3,847 4,893 12% 5,068 13% 5,743 14% 15% , , , ,537 45,556 43,788 43,295 10% 9% 2Q 02 3Q 02 4Q 02 1Q 03 2Q (E) Apr-02 Jun-02 Aug-02 Oct-02 Jan-03 Mar-03 May-03 % of Total Revenues* WI ARPU *% of Total Revenues excluding interconnection revenues ARPU MOU (Outgoing) ARPU : Average Revenue Per User MOU : Minute of Usage

5 I. SK Telecom SK Telecom, Data Transmission Speed - k bps 2, May `84 AMPS 1G Voice Telephone (Voice) 2G Text Messaging Voice Mail Fax Jan`96 : 95A Aug`99 : 95B CDMA IS-95 CDMA X E-Newspaper E-Book October `00 January `02 `03 Onward Still Image Audio Streaming Location -Based Service 1x x EV-DO VOD Mobile TV Mobile Advertising 3G WCDMA Video Streaming Video Telephony Digital Image Video Mail M-Coupon M-Commerce

6 SK Telecom DMB Beyond 3G Software Defined Radio

7 II Service Data Voice Data Video (Internet,TV) Commerce 3D, (,, ) Entertainment(Game,Gamble) Service SMS Text Service Picture (,, ) Video LBS Mobile TV (Interactive TV) ITS HDTV DMB GMPCS ISDN ADSL/VDSL Cable HFC(10M) HFC(100M) FTTH Infra CDMA X IS-95A/B 1xEV-DO 1xEV-DV GSM WCDMA HSDPA All-IP Wireless LAN High-speed Wireless LAN Access (WLL) Access(BWA) (Mobile BWA) ITS : Intelligent Transport System ISDB : Integrated Services Digital Broadcasting ADSL : Asynchronous Digital Subscriber Line BWA : Broadband Wireless Access VDSL : Very high speed Digital Subscriber Line HFC : Hybrid Fiber Coaxial Cable FTTH : Fiber To The Home GMPCS : Global Mobile Personal Communications by Satellite LAN : Local Area Network DMB : Digital Multimedia Broadcasting HSDPA : High Speed Downlink Packet Access WLL : Wireless Local Loop

8 II. - DMB Cellular Network WLAN Home Network Coverage ~512kbps Macro ~ 10 Mbps Micro 30~50Mbps Hot Spots 11~100Mbps Indoor 100~3.2Gbps Data Rate GHz IS-95/CDMA2000 1X IMT-2000 PI WLAN/HN DMB WLAN

9 II. - Broadband Convergence Network Commerce Finance Solution Media 5.Beyond 3G 100Mbps~1Gbps, 2-10 GHz Band Vehicular Environments FTTH Extremely High Speed Fiber xdsl ADSL: Upto 8Mbps,4~5Km range VDSL: Upto 54Mbps,400~500M Existing Copper Gateway Authentication Billing Roaming NMS IP Backbone/ All Optical Network New Mobile Access 4.Satellite DMB Mbps/3,40 GHz band Fixed User/Metropolitan Area Broadcasting ITS Satellite IEEE 1394 Ethernet/HPNA Home RF IEEE Bluetooth Access Gateway PLC 1.Cellular Network IS95-A/B, CDMA x, 1xEV-DO, WCDMA Application Application AP roaming 2.WLAN AP 3.Portable Internet Vehicular Speed < 60Km/h User Data Rate > 1Mbps roaming ITS : Intelligent Transport System ADSL : Asynchronous Digital Subscriber Line VDSL : Very high speed Digital Subscriber Line FTTH : Fiber To The Home HPNA : Home Phone-line Networking Alliance PLC : Power Line Communication NMS : Network Management System DMB : Digital Multimedia Broadcasting

10 II. SK Telecom DMB Beyond 3G Software Defined Radio

11 II GPP2 IS-95-A Voice 14.4 kbps circuit IS-95-B Voice 64 kbps Data IS-95A compatible CDMA2000 1x Voice Capacity(x2 IS-95) 153 kbps Data IS-95A/B Compatible 1xEV-DO Higher Cap Voice/ Data 2.4 Mbps Data IS-95A/B Compatible CDMA2000 1X Release A CDMA2000 3x 1xEV-DV Integrated Voice/ Data 4.8 Mbps Data CDMA2000 1X Release C Voice Capacity (x3 CDMA2000 1X) 384k ~ 2Mbps Data IS-95A/B Compatible 3GPP IS-136 GSM Voice 9.6 kbps GSM GPRS 30~40 kbps Packet GSM Compatible EDGE 384 kbps Packet WCDMA R 99,R4 High Capacity Voice 384 kbps ~ 2 Mbps Packet TDD/FDD mode R5 IP Transport IP based Multimedia service HSDPA Integrated Voice/Data 10Mbps Packet Broadcasting Service Capacity Increase WCDMA R5 ~ Voice Voice, Data (circuit) Data Voice, Data (circuit, packet) Return

12 II. SK Telecom DMB Beyond 3G Software Defined Radio

13 II. AAA WLAN E1/T3 Router S/W Hub AP / Router AP S/W Hub WLAN S/W Hub,, S/W Hub AP),, Hotspot Solution / AP Network NATE Campus: 7 - AP: 600 AAA : Authentication, Authorization, and Accounting AP : Access Point Zone 2 (, ) -57Hotspot - AP: 200 NMS : Network Management System WLAN : Wireless Local Area Network Core Network Core - AAA, Billing, NMS

14 II. SK Telecom WLAN WEP AES(Advanced Encryption Standard), TKIP(Temporal Key Integrity Protocol) TKIP : TTLS(Tunneled Transport Layer Security), PEAP(Protected Extensible Authentication Protocol), Cellular,, inter-system handover delay, AP,, WRC GHz 455MHzWLAN 5GHz WLAN,, ( ) 5GHz Feasibility PI : Portable Internet AAA : Authentication, Authorization, and Accounting Connection Manager : / (TTLS), CDMA2000 1X/WLAN BASN(Broadband Access Serving Node) : Mobile IP, Access control, Radius Proxy Connection Manager : 1xEV-DO/WLAN, PI/WLAN BASN WLAN/ WLANAAA : PEAP 5GHz WLAN WEP : Wired Equivalent Privacy Return

15 II. Cellular High Mobility Low Data rate Enhancing Data rate Mobility Enhanced High Data Rate Multi Access Low Cost High Speed Mobile Internet Medium Tier( ) Enhancing Mobility WLAN Low Mobility High Data rate 30~50 Mbps High Tier(Cellular) IMT-2000 (WCDMA, CDMA2000 1X, 1xEV-DO/DV) Low Tier (Wireless LAN) (802.11b/a/g) IP based Radio Access network All-IP based Core Network Telecommunications World Internet/Intranet World : 2.3GHz WLL Q: HPi Project (ETRI,, SK Telecom, KT, KTF, ) Q: TTA 2.3GHz

16 II. ETRI HPi Flarion f-ofdm BroadStorm Navini Ripwave ArrayComm i-burst Duplex Bandwidth Multiple Access TDD 10MHz OFDMA FDD TDD TDD TDD 1.25MHz x 2 5MHz 5MHz 5MHz FH-OFDMA OFDMA MC-SCDMA TDMA/SDMA Single User Downlink Data Rate at Cell Edge 1Mbps 634Kbps 800Kbps 1Mbps 384Kbps Maximum Data Rate DL UL 24.8 Mbps 5.2 Mbps 3.2 Mbps 950 Kbps 8 Mbps 512 Kbps 8 Mbps 4 Mbps 14.4 Mbps 1.6 Mbps Maximum Vehicular Speed Supported 60Km/h 250Km/h 100Km/h Future 250Km/h 40Km/h(NLOS) 80Km/h(LOS) 25Km/h Maximum User/Sector not defined Urban Coverage Suburban Rural Antenna Technology Commercialization 0.6Km 1.3Km 5Km 05 MIMO 05, 2Q 0.6Km 1.5Km 6Km 1.6Km 3Km 8Km 5.7Km 10Km 13Km 3-sector Tx/Rx Diversity 4Q, 04 Smart Antenna Smart Antenna Joint detection 1.3Km 3Km 11Km Smart Antenna 03, 1Q - 03, 1Q 04, 3Q OFDM : Orthogonal Frequency Division Multiplexing MC : Multicarrier FH : Frequency Hopping SDMA : Space Division Multiple Access TDMA : Time Division Multiple Access MIMO : Multiple-Input Multiple-Output

17 II. HPi HPi-10 HPi-10m Subject Output HPi Specification Draft Spec Spec Standardization Spec (TTA) Standardization Standardization (TTA) (Global) - Specification System Implementation (HPi-10) System Implementation (HPi-10m) High Level Design Detailed Design Demonstration Implementation Testing Detailed Design Implementation Testing - Portable Terminal - Base Station(AP) -PAR(Packet Aggregation Router) HPi-10m : MIMO applied system(dl : 50Mbps) MIMO : Multi-Input Multi-Output Return

II. DMB DMB Satellite DMB Gap-Filler,, TDM 25 MHz (13.824 ~ 13.849 GHz) CDM 25 MHz (13.858 ~ 13.883 GHz) CDM 25 MHz 2.630 ~2.655GHz TDM 25 MHz (12.

18 II. DMB DMB Satellite DMB Gap-Filler,, TDM 25 MHz ( ~ GHz) CDM 25 MHz ( ~ GHz) CDM 25 MHz ~2.655GHz TDM 25 MHz ( ~ GHz) Gap Filler CDM 25 MHz ~2.655GHz CDM : Code Division Multiplex TDM : Time Division Multiplex DMB : Digital Multimedia Broadcasting

19 II. DMB DMB Satellite SS Loral (20041 ) Gap Filler Gap Filler (3Q, 03) Terminal -,,, PDA -, LG, Toshiba 21 - (4Q, 03), (1Q, 04) CellPLAN TM DMB (3Q, 03) DM(Diagnostic Monitor) (4Q, 02)

20 II. DMB Gap Filler 9 11 CD-quality CDM (32~512kbps) Return

21 II. SK Telecom DMB Beyond 3G Software Defined Radio

II. Beyond 3G Systems Beyond IMT-2000 will encompass the capabilities of previous systems High Beyond 3G Mobility IMT-2000 Enhancement Enhanced IMT-2000 New Mobile Access New Capabilities Of Systems

22 II. Beyond 3G Systems Beyond IMT-2000 will encompass the capabilities of previous systems High Beyond 3G Mobility IMT-2000 Enhancement Enhanced IMT-2000 New Mobile Access New Capabilities Of Systems Beyond IMT-2000 Dashed line indicates that the exact data rates associatedwith Systems Beyond are not yet determined. Low New Nomadic / Local Area Wireless Access Peak Useful Data Rate (Mb/s)

23 II. Beyond 3G Ubiquitous Mobile Access Beyond 3G High Capacity 3G Smart Antenna, /,, Low Cost Service Return

24 II. 신기술 및 서비스 광대역 통합망(BcN) 광대역 광대역 통합망의(BcN) 통합망의(BcN) 개념 개념 유무선의 유무선의 다양한 다양한 접속환경에서 접속환경에서 통합 통합 단말 단말 및 및 정보가전을 정보가전을 통해 통해 언제 언제 어디서나 어디서나 고품질 고품질 음성, 음성, 데이터 데이터 및 및 방송이 방송이 융합된 융합된 광대역 광대역 멀티미디어 멀티미디어 서비스가 서비스가 제공되는 제공되는 통합 통합 네트워크 네트워크 OSS/BSS CP/PP 통신/방송 등 다양한 서비스 Soft-switch Open API G/W Mobility server IP기반 단일망 (IPv6/MPLS) Access gateway Beyond 3G QoS/security Control Control server Transport 광 전송 망 Broadband Wireless(HPi) Application Satellite Access Wired Comm. Broadcasting broadcasting Mobile Home Network UC Network Terminal 다기능 통합 단말 및 정보가전 -24- BcN : Broadband convergence Network UC : Ubiquitous Computing CP : Content Provider PP : Program Provider OSS : Operating Support System BSS : Business Support System MPLS : Multi-protocol Label Switch

25 II. - Requirement Ubiquitous BcN BcN (2003) BcN / e-korea 2006 (2002 ~ 2006) U-Korea BcN U-Network BCN u-korea 2010 Time

26 II. - Factors 1 st st Stage (2004 ~ 2005) 2 nd nd Stage (2006 ~ 2007) 3 rd rd Stage (2008 ~ 2010) Network Independent Evolution of IP based Services High Quality and Security Integration of Mobile and Fixed Network Introduction of FTTH Integrated IP based Network Spread of FTTH Speed (bps) Fixed 50M Mobile 2M Fixed 50M ~ 1G Mobile 2M ~ 50M Fixed 50M ~ 1G Mobile 10M ~ 100M NGcN (diffusion ratio) 5,000,000 House Hold (31%) 35,000,000 Subscribers (73%) 11,200,000 House Hold (70%) 37,440,000 Subscribers (90%) 14,400,000 House Hold (90%) 39,840,000 Subscribers (93%) Services (examples) Mobile/Fixed Video Phone Home Networking Network Based High Quality Broadcasting Service Broadband MMoIP

27 II. SK Telecom DMB Beyond 3G Software Defined Radio

28 II. Software Defined Radio SDR SDR Upgrade, / SDR S/W GSM, SDR CDMA prototype -AirNetAdaptCell -SDRTSpectruCell - HarrisFALCON II,, 2004 Time-to-market

29 II. Software Defined Radio SDR Roadmap SDR Forum Prototype B3G Spec. work in progress SDR SDR SDR Prototype SDR SDR SDR GSM CDMA200 1x WCDMA HSDPA HPi B3G Service

30 II. CellPLAN RANO(Radio Network Optimizer)

31 II Q Q Simulation ~9 Sprint Field Trial Diversity Chip

32 II. -, ~8 (Drive test) Compact MLA License Agreement Multi-band : SDR Q,

II. - -CellPLAN GIS(), Cellular Network 1998.

33 II. - -CellPLAN GIS(), Cellular Network CDMA Cellular CDMA2000 1XCellPLAN Network xEV-DOCellPLAN Know-how WCDMACellPLAN Tool (,,, ) 3 GIS DB CellPLAN (Cellular Radio Network Planning System)

34 II. - Cellular Network Real-time Network, Network Network Network CDMA2000 1XRANO xEV-DORANO Know-how Tool WCDMARANO Network Engineering Cellular Network RANO (Radio Network Optimizer) Performance Indication Monitoring Efficiency Indication Monitoring Statistical Analysis for Optimization Optimization Analysis Diagnosis Analysis for Optimization

35 SK Telecom DMB Beyond 3G Software Defined Radio

36 II.

37 SK Telecom DMB Beyond 3G Software Defined Radio

38 Portable Internet Satellite Digital Multimedia Broadcasting Beyond 3G Wireless LAN Software Defined Radio Performance Enhancement Technology Broadband convergence Network R&D, Global Leader in Wireless Technology & Product Innovation Technology Evolution to 3G and next... Leading Position in Wireless Internet Market Service Evolution to Multimedia

39 Thank you September 2003

통신서비스품질평가보고서 2017 Evaluation Report for the Quality of Communication Services

www.nia.or.kr 2017 통신서비스품질평가보고서 2017 Evaluation Report for the Quality of Communication Services www.nia.or.kr 2017 통신서비스품질평가보고서 2017 Evaluation Report for the Quality of Communication Services www.nia.or.kr