1. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary Access to the Global Internet: Which Technology Will Win? Evolution +3G builds on existing networks +Huge volumes +Global spectrum –Separate network –Optimized for voice –Old technology Revolution +IP networks +Optimized air interfaces +Design for converged traffic +New technology for low cost –No global spectrum or approval –No market momentum –Timing? For most of the world in 5 years (aside from North America and part of Europe): Phone = Cell Phone Internet = Wireless Internet

2. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary RadioRouter – Enabling Wireless Data Internet mobility prospect is supercharging ‘Wireless Data’ demand RadioRouter networks are designed specifically for data; enabling Wireless data with wireline quality, broadband speed and low cost which will drive end-user adoption of wireless data Wireless Service Providers to maximize their Return on Spectrum which will drive deployment of RadioRouter networks Evolving cellular networks have a systematically flawed data approach 3G is spectrally inefficient and 3G data are prohibitively expensive

3. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary RadioRouter Rajiv Laroia, PhD laroia@lucent.com Phone: 908-582-5409 Head, Digital Communications Research Dept. Wireless Research Center Bell Labs

4. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary Why RadioRouter? Today’s cellular network is an artifact of yesterday’s constraints RadioRouter is the result of optimizing against today’s requirements and demands to create a highly efficient wireless data network RadioRouter technology consists of two fundamental innovations: Low-cost, micro-cell network that is simple to deploy, easy to operate and low- effort to maintain Air-link technology that is seamless with IP network and capable of landline quality of service RadioRouter will enable a new class wireless service providers to realize the economic value of wireless data

5. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary Yesterday’s Constraints Dictates Today’s Cellular Network Yesterday’s constraints Voice traffic Centralized switching Expensive back-haul access High cost electronics Today’s network architecture “Smart” (translation, expensive) basestations with high-power, tall antennae carefully optimized to provide large geographic coverage Uniformly distributed, shared air-link designed to serve a large number of low data-rate users Expensive circuit-switched networking

6. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary World Has Changed! Technology, demand and access economics have changed Cheaper access --- xDSL/cable Smaller electronics Data demand --- Internet Network requirements have changed Many low cost basestations connected directly to an IP network Lower total system cost --- reduced cost of high-speed data Higher capacity Low antenna height --- 10 feet Longer battery life

7. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary RadioRouter Wireless Data Access Network RadioRouter Access Network Cable Modem RadioRouter IP Packet Networks Low-cost, micro-cell architecture - maximizing bit/Hz/$ and capacity through spatial reuse Flash-OFDM - optimizing air-interface for packet traffic Autonomous basestations - Minimizing network planning Distributed networks - Leveraging IP to manage data traffic and mobility Low latency - enabling real time interactive applications Internet PSTN Circuit Switching Intranets WAN IP Backbone Central Wireless Network Servers Packet Routing DSL 7 – 12 RadioRouters deployed in coverage area of ONE Cell-Tower DSLAM Coax To IP Network

8. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary New system designed from ground up to do data efficiently Low cost Higher capacity (spatial reuse) /spectral efficiency Flexible, demand driven data rates Direct connection to IP network Wireline not wireless error probability Power efficient for long battery life Low latency RadioRouter Is Designed for Wireless Data $3000 PC BASE STATION DSL INTERNET

9. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary RadioRouter’s Micro-Cell Innovation RadioRouter connects to the IP backbone via low cost xDSL or cable modem Mobile IP for mobility management - no expensive switches Dumb basestations --- sophisticated airlink Autonomous basestations do not require a priori knowledge of the network nor their basestation neighbors --- simple installation lead to extremely scalable networks lower planning and maintenance cost --- enable non-traditional service providers Simplicity of Wireless IP RadioRouter networks leads to lower installation and operating costs

10. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary RadioRouter’s Seamless IP and Landline Interface Innovation Flash OFDM uses multiple tones (~400) and fast hopping to spread signals over a 5 MHz band Format is tolerant of both multipath and high-speed Doppler FDD airlink has 5MHz uplink and 5 MHz downlink bands OFDM has no interference between users in the same cell and interference between users from different cells is minimized due to use of hopping patterns OFDM air-interface enables 3 times higher data rate than 3G air-interfaces Flash OFDM permits autonomous basestations

11. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary RadioRouter--Wireless Service Provider’s Best Friend RadioRouters have the complexity and cost of a ‘Pentium with Antenna’ plugged directly to the internet Low antenna height with small cellsites ~ 1km radius (100 m to 15 miles) --- airlink specifically designed for this Philosophy is not to maximize the capacity per basestation but rather to maximize the capacity per dollar spent! $3000 PC BASE STATION DSL INTERNET

12. Lucent Technologies Bell Labs Innovations Lucent Technologies - Proprietary RadioRouter Alone Meets Wireless Data Challenge 3G expensive infrastructure, problems with capacity and latency and scaling GSM CDMA-2000 TX IP ? IEEE 802.11 -local area only, inefficient spectrally Ricochet low capacity ham radio