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OFDM For Next Generation Mobile Wireless Internet

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OFDM For Next Generation Mobile Wireless Internet. Rajiv Laroia CTO, Flarion Technologies. Anywhere anytime Internet connectivity (WAN) Typically over licensed spectrum Seamless extension of the Internet: end-to-end IP Support for voice and broadband data Provide QoS (Quality of Service)

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slide1
OFDM For Next GenerationMobile Wireless Internet

Rajiv Laroia

CTO, Flarion Technologies

what is mobile wireless internet
Anywhere anytime Internet connectivity (WAN)

Typically over licensed spectrum

Seamless extension of the Internet: end-to-end IP

Support for voice and broadband data

Provide QoS (Quality of Service)

Affordable to end users

What is Mobile Wireless Internet?
is ofdm technology the answer
Is OFDM Technology the Answer?

Is 2.5/3G the Answer?

United States --- CDMA 2000

Europe --- GPRS (TDMA) / UMTS (W-CDMA)

  • Circuit switched approach, complex network
  • Not seamless, Internet protocols don’t work
  • Circuit voice, packet data
  • No interactive data support, no QoS support
  • Expensive to end users
ofdm based wireless technology the right answer
OFDM Based Wireless TechnologyThe Right Answer

Flarion Technologies has developed flash-OFDM™, a new packet data air-interface technology for mobile wireless Internet.

flash ofdm network architecture
flash-OFDMNetwork Architecture

Public Internet

Gateway

Gateway

PSTN

Operator’s

IP Network

Base Stations

Cellular Air Interface

User Terminals

End-to-End IP

flash ofdm air interface advantage
Packet data systems
    • Create fat pipe (physical layer)
    • Share pipe efficiently between users (MAC layer)
  • Create reliable links for data (link layer)
  • Send packet data over links (higher layers)
flash-OFDM Air-Interface Advantage
  • Circuit switched systems
    • Create pipes (physical layer)
flash ofdm physical layer advantage
flash-OFDM Physical Layer Advantage
  • Downlink & Uplink based on OFDM
    • Orthogonal --- TDMA benefits
    • Spread Spectrum --- CDMA benefits

Tones

Fat Pipe

Fast Hopped - Spread Spectrum

1/T

T

sym

Time

flash ofdm mac link layer advantage
01flash-OFDM MAC/Link Layer Advantage
  • OFDM granular resource partition
    • No overhead control messaging
    • Data as frames

Data Frame

Tones

1/T

T

sym

Time

flash ofdm mac link layer advantage9
QoSflash-OFDM MAC/Link Layer Advantage
  • Fast retransmission over airlink
    • Few millisecond retransmission loop time
    • Supports interactive applications
  • Uplink transmission requests
    • No contention based access
    • Uplink/downlink data frames scheduled

Interactive Data

flash ofdm higher layer advantage
flash-OFDM Higher Layer Advantage

Better

User Experience

  • Reliable link
    • Far fewer end-to-end retransmissions
  • Low delay
    • Efficient transport layer (TCP/IP)
    • Higher burst rates meaningful
    • Interactive applications supported (VoIP)
  • Mobile IP for hand-off
    • True make-before-break with no soft-handoff
    • IP to the RadioRouter™
    • Reliable seamless handoffs
flash ofdm system advantages
flash-OFDM System Advantages
  • Transmit antenna and multi-user diversity
  • Autonomous RadioRouters™
    • No common timing reference (no GPS)
    • No need for frequency or code planning
    • No knowledge of neighboring RadioRouters™
  • Scalable, flexible architecture
  • Lower cost:
    • System planning
    • System deployment
    • Maintenance

Highest bits/Hz/$

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