Access to the Global Internet: Which Technology Will Win?

1
Access to the Global Internet Which Technology
Will Win?
For most of the world in 5 years (aside from
North America and part of Europe) Phone Cell
Phone Internet Wireless Internet

• 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?

2
RadioRouter Enabling Wireless Data

• Internet mobility prospect is supercharging
  Wireless Data demand

• Evolving cellular networks have a systematically
  flawed data approach
• 3G is spectrally inefficient and 3G data are
  prohibitively expensive

• 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

3
RadioRouter

• Rajiv Laroia, PhD
• laroia_at_lucent.com Phone
  908-582-5409
• Head, Digital Communications Research Dept.
• Wireless Research Center
• Bell Labs

4
Why RadioRouter?

• Todays cellular network is an artifact of
  yesterdays constraints
• RadioRouter is the result of optimizing against
  todays 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
Yesterdays Constraints Dictates Todays Cellular
Network

• Yesterdays constraints
• Voice traffic
• Centralized switching
• Expensive back-haul access
• High cost electronics
• Todays 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
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
RadioRouter Wireless Data Access Network

• 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
Central Wireless Network Servers
Intranets
Packet Routing
DSLAM
PSTN
WAN IP Backbone
DSL
Circuit Switching
To IP Network
Cable Modem
To IP Network
Coax
To IP Network
To IP Network
RadioRouter Access Network
7 12 RadioRouters deployed in coverage area of
ONE Cell-Tower
8
RadioRouter Is Designed for Wireless Data

• 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

INTERNET
DSL
3000 PC BASE STATION
9
RadioRouters 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
RadioRouters 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
RadioRouter--Wireless Service Providers 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!

INTERNET
DSL
3000 PC BASE STATION
12
RadioRouter Alone Meets Wireless Data Challenge

• 3G expensive infrastructure, problems with
  capacity and latency and scaling

• Ricochet low capacity ham radio

• IEEE 802.11 -local area only, inefficient
  spectrally