1. Technologies for Wireless Multimedia in the XXI Century Porto Seguro, Brazil 5 June 2001 Joanne C. Wilson ArrayComm, Inc.

2. Convergence creates a huge opportunity Market Size 200 Million Subs 1998 2005 300 Million Subs 1 Billion Subs WIRELESS INTERNET “WIRELESS INTERNET” Source: ITU, DLJ

3. But not guaranteed success “Gold standard” for performance is wired (dialup or LAN) connection Service providers, ASP’s, application and content providers will focus on the moderate-to-high bandwidth customers Pricing of wireless must be competitive with wireline alternatives

4. Requirements for realizing the opportunity The best aspects of wired connections –reliability … per-user throughput … low cost … rich content The best aspects of wireless connections –freedom to move … always on … ubiquity PlayStation

5. Requirements for realizing the opportunity (cont’d) Low barriers to entry for service and content providers –cost … complexity Low barriers to entry for access operators –cost … complexity

6. Traditional cellular systems Provide a partial solution –ubiquity and high-speed mobility But... –designed to support low bandwidth, intermittent subscribers –can not provide significant per-user throughput at low cost –expensive and complex networks Best suited to high mobility, low bandwidth applications with specialized content

7. Fixed Wireless Access systems (MMDS, …) Meets a different set of the requirements –ubiquity, moderate- high per user bandwidth, reliability But … –neither mobile nor portable –typically require professional installation of end-user equipment (not low cost)

8. Fixed Wireless Access systems (MMDS, …) Only moderate spectral efficiency, and limited capacity below 3 GHz Best suited as “local loop bypass” solutions

9. Central elements of the “right” solution Massive capacity to deliver high speed, high quality service to all customers Spectral efficiency to enable economical operation in crowded bands below 3 GHz (portability requirement)

10. Central elements of the “right” solution (cont’d) Mass market pricing Data-centric, open, IP architecture for content and services  All of the above are achievable today

11. Open Services Platform SubscribersNSP Enterprise ContentProvider Content & ApplicationProvider Access & Transport Service Base station WAN Tunnel Switch(es) PSTN/ DSL Cable

12. Open Service Features End to end IP connectivity for end- users –widest choice of end- user terminals and applications –common service and content base for wired and wireless users

13. Open Service Features (cont’d) PPP connectivity model –leverages existing ISP provisioning, management and billing tools –PPP sessions backhauled via L2TP

14. Open Service Features (cont’d) Clear separation of access and end-user service –shared access and transport network –connectivity to multiple ISP’s, ASP’s, content and VPN providers

15. Radio Access Platform Optimized air interface for reliable and efficient packet data transport Time Division Duplexed (TDD) –maximizes flexibility in band selection (key below 3 GHz) –maximizes flexibility in accommodating asymmetry Peak per-user data rates >1 Mbps PC Card, USB, Ethernet end-user devices

16. Radio Access Platform (cont’d) “Smart” antennas using spatial processing maximize capacity and coverage

17. Radio Access Features Spatial processing + TDD –maximizes flexibility in band selection –provides unmatched coverage and spectral efficiency, 4 b/s/Hz or 40 Mbps/cell in 10 MHz Native IP interface to wired network –simplifies network architecture –allows operator broadest choice in wired network elements –reduces network cost

18. Keys to Delivering Portable Broadband Multimedia Access Massive Capacity Enabling High Speed, High-Quality Service for ALL –Adaptive antenna technology (spectral efficiency) Ubiquitous Coverage & Mass Market Pricing Internet/Open Architecture for Content and Services

19. Wireless DSL System Features 4 Bits/Sec./Hz/cell Spectral Efficiency Provides 400x capacity over 2G and 40x over 3G 1 Mbps to 40 Mbps User Data Rates Powered by IntelliCell Adaptive Smart Antenna Processing with Packet Switching End to End Wireless IP Access and Transport TDMA/TDD Packet Air Interface Licensed Spectrum Below 3 GHz

20. Wireless DSL Subscribers Core spatial processing systems expertise PSTN/DSL Cable WAN frame relay ATM etc. Tunnel switch L2TP network server “W-DSL” Mobility Solution Content provider Enterprise Application service provider ISP AAA Standard ISP infrastructure “W-DSL” chipset “W-DSL” radio infrastructureExisting wired Broadband access Services “W-DSL” Base Station “W-DSL” Base Station “W-DSL” Base Station Internet “W-DSL” Wireless air interface Wireless DSL End to End Architecture

21. IMT-2000 & Wireless DSL compatibility Telephone Voice & Data Tariffs –Voice-per minute –Data-per packet Terminal ALL IP Wireless Tariffs –Flat Rate –Premium DSL rate IMT-2000 Wireless DSL Wireless DSL protects Operators high value voice services by relieving network of extended duration high-speed data traffic.

22. IMT-2000 & Wireless DSL compatibility IMT-2000 Wireless DSL Wireless DSL does not need to be backward compatible with 2 nd Generation voice standards

23. Summary The potential market is huge Successful solutions have to address all of the market’s needs –the performance of the wired network –the applications of the wired network (the availability of the wireless link will foster new app’s) –the freedom of wireless The challenge can be met with proven technologies in a Wireless DSL architecture

24. The Reward... 1 Billion 275 Million 180 Million 65 Million 675 Million PlayStatio n Many Millions 250 Million