1. CDMA / EVDO/ LTE Interoperability and migration plans B.V.Raman CDMA Development Group bvraman@cdg.org Colombo, Sri Lanka, 7-10 April 2009

2. Key Messages differentCDMA and OFDM are different technologies with different capabilities CDMA2000 ® offers high-performance mobile broadband and voice services today and will continue to be enhanced to provide greater broadband speeds and voice capacity OFDM leverages wider-bandwidths up to 20 MHz to provide greater speed and capacity complementOFDM-based backhaul, broadcast and broadband networks will complement CDMA2000 Augmenting CDMA2000 in high-tele density areas and leveraging CDMA2000s ubiquitous coverage with multimode devices to provide seamless continuity of services Notes: 1. OFDM is the air interface used by WLAN, mobile broadcast and next-generation mobile broadband technologies (LTE, etc.) 2. 4G will be defined by the ITU-R as a result of the IMT.Advanced standardization effort.

3. Key Messages (Contd…) Global mass market adoption timing of wider-bandwidth OFDM-based solutions will vary from Market to Market Wider-bandwidth spectrum availability will drive OFDM-based network deploymentsWider-bandwidth spectrum availability will drive OFDM-based network deployments Mass market adoption of OFDM-based solutions will depend on ubiquitous coverage, low-cost handset availability, VoIP replacing circuit-switch voice services and roamingMass market adoption of OFDM-based solutions will depend on ubiquitous coverage, low-cost handset availability, VoIP replacing circuit-switch voice services and roaming Notes: 1. OFDM is the air interface used by WLAN, mobile broadcast and next-generation mobile broadband technologies (LTE, etc.) 2. 4G will be defined by the ITU-R as a result of the IMT.Advanced standardization effort.

4. Key Messages (Contd…) long- term industry value ARPUMeanwhile, EV-DO offers substantial long- term industry value by remaining the core technology driving most operators ARPU well into the next decade firstCDMA2000 operators will be among the first enabled to augment their networks with by wider-bandwidth OFDM-based solutions WorldMode TMCDMA2000 WorldMode TM devices will enable this competitive advantage interoperableCDMA2000 networks will be interoperable with OFDM- based radio technologies No need to deploy GSM or UMTS to obtain this advantage Notes: 1. OFDM is the air interface used by WLAN, mobile broadcast and next-generation mobile broadband technologies (LTE, etc.) 2. 4G will be defined by the ITU-R as a result of the IMT.Advanced standardization effort.

5. CDMA and OFDM-based Technologies CDMA and OFDM are different technologies with different capabilities Wide bandwidth OFDM-based networks will complement 3G broadband networks for Broadband MFLODVB-HISDB-TT-DMBS-DMB WiMAX (802.16d) LTE Mobile WiMAX (802.16e/m) Wi-Fi (802.11n) Additional Broadband Capacity BroadcastBackhaul OFDM leverages wider-bandwidths up to 20 MHz

6. Next Generation Broadband Business Case The business case for wider-bandwidth mobile broadband networks is being created and validated by Rev. A Broadcast HDTV* Mobile Broadband Consumer Electronics Fixed Broadband Access Concurrent Services**** Business Applications** Push-to-Media (SWIS)*** Ultra Mobile Portable Computers * Including broadcasting content to motor vehicles **Including video telephony, distance learning, remote medicine and other video-enabled field services *** See What I See (SWIS) ****For example, telephony, chat, push-to-talk, data casting, position location and mobile commerce during 3D multiplayer gaming. 3G is generating the demand and proving the business case for Next-G

7. 3G CDMA3G CDMA OFDMA Broadband Overlay Timeline OFDM-based solutions will be built-out over time as demand grows and spectrum becomes available 3G CDMA WAN Coverage OFDMA OFDMHotzone Today Next 10 years (Coexistence) Beyond 10 years (Migration) 3G CDMA WAN networks will coexist with OFDM-based solutions until next generation broadband networks are fully capable of delivering: 1)Ubiquitous coverage 2)Carrier-grade VoIP 3)Low-cost devices * 4)Global roaming * * Harmonization of spectrum for OFDM-based solutions will be necessary to build economies of scale and enable global roaming OFDMHotzone OFDMHotzone

8. CDMA2000 Roadmap VoIP DL: 2.4 Mbps UL: 153 kbps (1.25 MHz, FDD) 35 calls/sector DL: 153 kbps UL: 153 kbps (1.25 MHz, FDD) DL: 3.1 Mbps UL: 1.8 Mbps (1.25 MHz, FDD) 1xEV-DO Rel. 0 35 -55 calls/sector 1 DL: 153 kbps UL: 153 kbps (1.25 MHz, FDD) e.g., Quadruple voice capacity 2 (1.25 MHz, FDD) 1X Enhancements CDMA2000 1X DL: 14.7 4 Mbps UL: 5.4 Mbps (5 MHz, FDD) e.g., DL data rates up tp 40 Mbps 5 (4 x1.25 MHz carriers, FDD) CDMA2000 Roadmap 1 Capacity increase to 55 users per sector (1.25MHz BW) with new EVRV-B codec and handset interference cancellation (QLIC). 2 Capacity increase of more than double 35 calls/sector is primarily due to UL and DL interference cancellation and mobile receive diversity 3 Peak rate for 3 EV-DO carriers with software upgrade. Standard supports up to 15 aggregated Rev. A carriers 4 Peak rate for 3 EV-DO carriers with 64QAM in the DL. Standard supports up to 15 aggregated Rev A carriers 5 EV-DO Enhancements include Femtocell support, MIMO and 64QAM in the DL and 16 QAM in the UL to enable peak data rates shown within4 EV-DO carriers 2006 2005200420032002 20072008 2009 2010 2011+ 2001 DL: 9.3 3 Mbps UL: 5.4 Mbps (5 MHz, FDD) Multicarrier EV-DO Rev. B S/WH/W EV-DO Enhancements 1xEV-DO Rev. A CDMA2000 offers a long-term evolutionary path forward

9. High-capacity, multi-purpose All-IP networks lower the total cost of network ownership and enable a larger selection of revenue streams Number of Simultaneous Voice Calls per Sector 1X Enhancements increase CDMAs already excellent voice capacity 4X

10. CDMA2000 Roadmap CDMA2000: Flexible Migration Path 1X Enhanced DO Enhanced 1.25 MHz Channel Scalable up to 20 MHz CDMA2000 allows operators the flexibility to design an evolution path that meets their unique needs 1xEV-DO Rel. 0 1xEV-DO Rel. 0 2006 2005200420032002 20072008 2009 2010 2011+ 2001 2000 EV-DO Rev. B EV-DO Rev. B CDMA2000 1X 1xEV-DO Rev. A 1xEV-DO Rev. A

11. 1xEV-DO Rel. 0 CDMA2000 1X 1xEV-DO Rev. A Multicarrier EV-DO Rev. B CDMA2000 Evolution Path OFDMA OFDMA Broadband Technologies Mobile WiMAX (802.16e)802.16m LTE or 1X Enhancements EV-DO Enhancements Coexistence of CDMA and OFDM 2006 2005200420032002 20072008 2009 2010 2011+ 2001 CDMA2000 will be complemented with OFDM-based solutions in many markets Complementary CDMA and OFDM Solutions

12. Graceful CDMA to LTE Evolution Standards alignment, driven by service providers CDMA2000 core networks with IMS and VCC will play a key role in expanding 3G and 4G deployments e.g. Seamless call handoffs between 2G, 3G and 4G networks e.g. EV-DO and LTE femtocells CDMA2000 operators will be among the first to deploy LTE CDGs evolution, device and roaming teams are working to ensure interoperability IP Core Networks and VCC Bridge CDMA and LTE

13. CDMA vs. OFDMA CDMA CDMA and OFDMA are different technologies with different capabilities 15MHz 20MHz 1.25MHz 10MHz5 MHz Sub-carriers are independent over the channel and scale with additional bandwidth Codes are spread over channel CDMA2000 1X and EV-DO are more efficient in bandwidths up to 5 MHz OFDMA-based solutions offers a simpler implementation in bandwidths greater than 10 MHz OFDM-based Technologies

14. Spectrum Flexibility CDMA2000 1X and EV-DO offer operators the flexibility to uniquely service diverse market demands CDMA2000 offers operators the flexibility to meet incremental market demands Clearing spectrum and deploying smaller carriers is easier and more affordable 1.25MHz 1X 5MHz 1.25MHz 1X Rev. B 1X 10 MHz 1.25MHz 1X Increasing Demand for Data Services Rev. A

15. Advanced Convergence Network Architecture An evolution to a flexible and flat IP-based network architecture Next generation broadband technologies will be integrated into CDMA2000 IP networks: Internet Gateway IMS IP Network (Ethernet) PSTN CDMA2000 networks will support both legacy and advanced IP network architectures UMB LTEMobile WiMAX

16. Next Generation Multimode Devices Next generation mobile broadband devices will leverage the learning curve of CDMA2000 WorldMode TM devices CDMA2000 operators will be among the first operators to offer next generation mobile broadband services * WiMAX is enabled using a separate chipset ** MDM 9800 and MDM 9600 chipsets will support FDD and TDD duplex modes and different carrier bandwidths. Radio Frequency Links: 450 MHz 700 MHz 800 MHz 1500 MHz GPS 1700 MHz 1800 MHz 1900 MHz AWS 2100 MHz 2500 MHz 3500 MHz LTE UMB WiMAX* WCDMA HSPA+ GPS EV-DO Rev. B EV-DO Rev. A EV-DO Rel. 0 CDMA2000 1X LTE UMB WiMAX* GPS EV-DO Rev. B EV-DO Rev. A EV-DO Rel. 0 CDMA2000 1X EV-DO Rel. 0 GPRS GSM GPS CDMA2000 1X

17. Penetrating the Market Next generation mobile broadband handset pricing trends will be similar to UMTS Next generation multimode handsets will need to approach existing handset prices to penetrate the market and build economies of scale Sources: 1. ABI ( Q4 2007), IDC (July 2007), Strategy Analytics (July 2007) and Yankee Group (Oct 2007) handset shipment forecasts 2. Yankee Group, CDMA2000 and WCDMA ASP trends, January 2008 Shipments (Millions) 3G CDMA Lowest Handset Pricing and Global Handset Shipment Volume Price (USD)

18. CDMA2000: Strong Global Presence CDMA2000 has built a strong ecosystem and enormous economies of scale 276 102 More than 276 operators in more than 102 countries have deployed or are planning to deploy CDMA2000 1XEV-DO Rel. 0 EV-DO Rev. A Commercial 27610659 In Deployment/Trial 234334 463 million CDMA2000 Subscribers CDMA2000 will continue to be the core business for hundreds of operators for well over a decade

19. Migration Timeline With an increasing number of subscribers, the migration process is lengthening Putting things into perspective: Mass adoption of wide-bandwidth OFDM-based solutions will take many years – Voice will remain the Killer Application. Migration of Subscribers

20. Mass market adoption of Rev. A advanced broadband services is strong 26 commercial operators in 18 countries (1/2 billion POPs covered) – 31 more in deployment Multicarrier Rev. B will meet demand for additional capacity well into the future Interoperability with OFDM-based broadcast and wide-bandwidth broadband solutions will be supported to supplement core CDMA2000 services CDMA2000: Strong Evolution Path CDMA ecosystem is continuing to enhance the CDMA2000 roadmap Sources: Strategy Analytics, Worldwide Cellular User Forecast, July 2007, and Mobile Broadband Subscriptions Forecast, November 2006 Wireless Intelligence World Cellular Subscriber Forecast, October 2007 Yankee Group, Global Mobile Forecast, October 2007 In-Stat/MDR, April 2007 Informa, Future Mobile Broadband: HSPA, EV-DO, WiMAX & LTE, 2007 Yankee Group, Modest WiMAX Grows Despite Uncertainty, January 2007 2004 20052006200720082009 Mobile Broadband Global Cumulative Subscribers

21. Substantial Long-term Industry Value CDMA2000: Long-Term Value Proposition CDMA2000 is strongly positioned to serve operator requirements for the long run High spectral efficiency in all environments Lower Total Cost of Ownership Capacity Robust mobility support with seamless handoffs across multiple air interfaces Better user experience Mobility Speed Ultra-high data speeds in downlink and uplink across entire coverage area Better user experience Large non- contiguous or ubiquitous coverage. Lower Total Cost of Ownership Coverage Devices Multimode devices support multiple radio interfaces Economies of Scale Ecosystem Large client base and experienced global suppliers.CompetitiveIndustry Lower end-to-end latency to support delay sensitive applications Better user experience Latency Time-to-Market Revenue-generating services become commercially available in early Improved Earnings VoIP Large numbers of VoIP calls coexist with high capacity data services. Improved Earnings IP-based Flat IP-based core network interconnectivity Improved Performance & Convergence